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{************************************************************************} |
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{ } |
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{ Borland Delphi Visual Component Library } |
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{ InterBase Express core components } |
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{ } |
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{ Copyright (c) 1998-2000 Inprise Corporation } |
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{ } |
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{ InterBase Express is based in part on the product } |
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{ Free IB Components, written by Gregory H. Deatz for } |
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{ Hoagland, Longo, Moran, Dunst & Doukas Company. } |
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{ Free IB Components is used under license. } |
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{ } |
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{ The contents of this file are subject to the InterBase } |
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{ Public License Version 1.0 (the "License"); you may not } |
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{ use this file except in compliance with the License. You } |
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{ may obtain a copy of the License at http://www.Inprise.com/IPL.html } |
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{ Software distributed under the License is distributed on } |
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{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either } |
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{ express or implied. See the License for the specific language } |
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{ governing rights and limitations under the License. } |
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{ The Original Code was created by InterBase Software Corporation } |
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{ and its successors. } |
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{ Portions created by Inprise Corporation are Copyright (C) Inprise } |
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{ Corporation. All Rights Reserved. } |
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{ Contributor(s): Jeff Overcash } |
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{ } |
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{ IBX For Lazarus (Firebird Express) } |
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{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk } |
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{ Portions created by MWA Software are copyright McCallum Whyman } |
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{ Associates Ltd 2011 } |
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{ } |
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{************************************************************************} |
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|
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unit IBCustomDataSet; |
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|
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{$Mode Delphi} |
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|
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{$IFDEF DELPHI} |
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{$DEFINE TDBDFIELD_IS_BCD} |
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{$ENDIF} |
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|
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interface |
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|
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uses |
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{$IFDEF WINDOWS } |
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Windows, |
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{$ELSE} |
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unix, |
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{$ENDIF} |
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SysUtils, Classes, Forms, Controls, IBDatabase, |
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IBExternals, IB, IBHeader, IBSQL, Db, |
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IBUtils, IBBlob; |
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|
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const |
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BufferCacheSize = 1000; { Allocate cache in this many record chunks} |
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UniCache = 2; { Uni-directional cache is 2 records big } |
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|
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type |
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TIBCustomDataSet = class; |
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TIBDataSet = class; |
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|
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{ TIBDataSetUpdateObject } |
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|
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TIBDataSetUpdateObject = class(TComponent) |
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private |
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FRefreshSQL: TStrings; |
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procedure SetRefreshSQL(value: TStrings); |
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protected |
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function GetDataSet: TIBCustomDataSet; virtual; abstract; |
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procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract; |
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procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract; |
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function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract; |
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procedure InternalSetParams(Query: TIBSQL; buff: PChar); |
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property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet; |
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public |
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constructor Create(AOwner: TComponent); override; |
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destructor Destroy; override; |
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published |
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property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL; |
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end; |
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|
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TBlobDataArray = array[0..0] of TIBBlobStream; |
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PBlobDataArray = ^TBlobDataArray; |
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|
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{ TIBCustomDataSet } |
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TFieldData = record |
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fdDataType: Short; |
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fdDataScale: Short; |
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fdNullable: Boolean; |
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fdIsNull: Boolean; |
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fdDataSize: Short; |
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fdDataLength: Short; |
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fdDataOfs: Integer; |
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end; |
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PFieldData = ^TFieldData; |
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|
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TCachedUpdateStatus = ( |
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cusUnmodified, cusModified, cusInserted, |
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cusDeleted, cusUninserted |
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); |
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TIBDBKey = record |
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DBKey: array[0..7] of Byte; |
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end; |
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PIBDBKey = ^TIBDBKey; |
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|
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TRecordData = record |
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rdBookmarkFlag: TBookmarkFlag; |
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rdFieldCount: Short; |
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rdRecordNumber: Integer; |
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rdCachedUpdateStatus: TCachedUpdateStatus; |
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rdUpdateStatus: TUpdateStatus; |
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rdSavedOffset: DWORD; |
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rdDBKey: TIBDBKey; |
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rdFields: array[1..1] of TFieldData; |
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end; |
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PRecordData = ^TRecordData; |
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|
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{ TIBStringField allows us to have strings longer than 8196 } |
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|
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TIBStringField = class(TStringField) |
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public |
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constructor create(AOwner: TComponent); override; |
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class procedure CheckTypeSize(Value: Integer); override; |
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function GetAsString: string; override; |
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function GetAsVariant: Variant; override; |
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function GetValue(var Value: string): Boolean; |
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procedure SetAsString(const Value: string); override; |
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end; |
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|
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{ TIBBCDField } |
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{ Actually, there is no BCD involved in this type, |
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instead it deals with currency types. |
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In IB, this is an encapsulation of Numeric (x, y) |
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where x < 18 and y <= 4. |
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Note: y > 4 will default to Floats |
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} |
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TIBBCDField = class(TBCDField) |
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protected |
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class procedure CheckTypeSize(Value: Integer); override; |
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function GetAsCurrency: Currency; override; |
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function GetAsString: string; override; |
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function GetAsVariant: Variant; override; |
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function GetDataSize: Integer; override; |
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public |
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constructor Create(AOwner: TComponent); override; |
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published |
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property Size default 8; |
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end; |
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|
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TIBDataLink = class(TDetailDataLink) |
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private |
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FDataSet: TIBCustomDataSet; |
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protected |
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procedure ActiveChanged; override; |
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procedure RecordChanged(Field: TField); override; |
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function GetDetailDataSet: TDataSet; override; |
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procedure CheckBrowseMode; override; |
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public |
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constructor Create(ADataSet: TIBCustomDataSet); |
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destructor Destroy; override; |
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end; |
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|
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TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord); |
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|
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{ TIBGenerator } |
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|
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TIBGenerator = class(TPersistent) |
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private |
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FOwner: TIBCustomDataSet; |
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FApplyOnEvent: TIBGeneratorApplyOnEvent; |
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FFieldName: string; |
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FGeneratorName: string; |
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FIncrement: integer; |
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procedure SetIncrement(const AValue: integer); |
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protected |
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function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer; |
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public |
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constructor Create(Owner: TIBCustomDataSet); |
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procedure Apply; |
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property Owner: TIBCustomDataSet read FOwner; |
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published |
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property Generator: string read FGeneratorName write FGeneratorName; |
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property Field: string read FFieldName write FFieldName; |
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property Increment: integer read FIncrement write SetIncrement default 1; |
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property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent; |
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end; |
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|
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{ TIBCustomDataSet } |
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TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied); |
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|
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TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError; |
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UpdateKind: TUpdateKind; var UpdateAction: TIBUpdateAction) |
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of object; |
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TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind; |
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var UpdateAction: TIBUpdateAction) of object; |
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|
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TIBUpdateRecordTypes = set of TCachedUpdateStatus; |
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|
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TIBCustomDataSet = class(TDataset) |
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private |
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FGeneratorField: TIBGenerator; |
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FNeedsRefresh: Boolean; |
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FForcedRefresh: Boolean; |
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FDidActivate: Boolean; |
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FIBLoaded: Boolean; |
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FBase: TIBBase; |
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FBlobCacheOffset: Integer; |
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FBlobStreamList: TList; |
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FBufferChunks: Integer; |
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FBufferCache, |
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FOldBufferCache: PChar; |
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FBufferChunkSize, |
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FCacheSize, |
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FOldCacheSize: Integer; |
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FFilterBuffer: PChar; |
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FBPos, |
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FOBPos, |
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FBEnd, |
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FOBEnd: DWord; |
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FCachedUpdates: Boolean; |
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FCalcFieldsOffset: Integer; |
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FCurrentRecord: Long; |
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FDeletedRecords: Long; |
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FModelBuffer, |
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FOldBuffer: PChar; |
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FOpen: Boolean; |
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FInternalPrepared: Boolean; |
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FQDelete, |
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FQInsert, |
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FQRefresh, |
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FQSelect, |
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FQModify: TIBSQL; |
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FRecordBufferSize: Integer; |
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FRecordCount: Integer; |
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FRecordSize: Integer; |
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FUniDirectional: Boolean; |
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FUpdateMode: TUpdateMode; |
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FUpdateObject: TIBDataSetUpdateObject; |
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FParamCheck: Boolean; |
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FUpdatesPending: Boolean; |
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FUpdateRecordTypes: TIBUpdateRecordTypes; |
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FMappedFieldPosition: array of Integer; |
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FDataLink: TIBDataLink; |
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|
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FBeforeDatabaseDisconnect, |
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FAfterDatabaseDisconnect, |
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FDatabaseFree: TNotifyEvent; |
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FOnUpdateError: TIBUpdateErrorEvent; |
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FOnUpdateRecord: TIBUpdateRecordEvent; |
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FBeforeTransactionEnd, |
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FAfterTransactionEnd, |
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FTransactionFree: TNotifyEvent; |
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|
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function GetSelectStmtHandle: TISC_STMT_HANDLE; |
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procedure SetUpdateMode(const Value: TUpdateMode); |
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procedure SetUpdateObject(Value: TIBDataSetUpdateObject); |
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|
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function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult; |
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procedure AdjustRecordOnInsert(Buffer: Pointer); |
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function CanEdit: Boolean; |
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function CanInsert: Boolean; |
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function CanDelete: Boolean; |
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function CanRefresh: Boolean; |
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procedure CheckEditState; |
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procedure ClearBlobCache; |
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procedure CopyRecordBuffer(Source, Dest: Pointer); |
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procedure DoBeforeDatabaseDisconnect(Sender: TObject); |
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procedure DoAfterDatabaseDisconnect(Sender: TObject); |
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procedure DoDatabaseFree(Sender: TObject); |
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procedure DoBeforeTransactionEnd(Sender: TObject); |
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procedure DoAfterTransactionEnd(Sender: TObject); |
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procedure DoTransactionFree(Sender: TObject); |
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procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer; |
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Buffer: PChar); |
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function GetDatabase: TIBDatabase; |
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function GetDBHandle: PISC_DB_HANDLE; |
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function GetDeleteSQL: TStrings; |
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function GetInsertSQL: TStrings; |
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function GetSQLParams: TIBXSQLDA; |
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function GetRefreshSQL: TStrings; |
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function GetSelectSQL: TStrings; |
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function GetStatementType: TIBSQLTypes; |
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function GetModifySQL: TStrings; |
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function GetTransaction: TIBTransaction; |
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function GetTRHandle: PISC_TR_HANDLE; |
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procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual; |
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function InternalLocate(const KeyFields: string; const KeyValues: Variant; |
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Options: TLocateOptions): Boolean; virtual; |
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procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual; |
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procedure InternalRevertRecord(RecordNumber: Integer); virtual; |
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function IsVisible(Buffer: PChar): Boolean; |
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procedure SaveOldBuffer(Buffer: PChar); |
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procedure SetBufferChunks(Value: Integer); |
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procedure SetDatabase(Value: TIBDatabase); |
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procedure SetDeleteSQL(Value: TStrings); |
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procedure SetInsertSQL(Value: TStrings); |
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procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer); |
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procedure SetRefreshSQL(Value: TStrings); |
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procedure SetSelectSQL(Value: TStrings); |
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procedure SetModifySQL(Value: TStrings); |
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procedure SetTransaction(Value: TIBTransaction); |
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procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes); |
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procedure SetUniDirectional(Value: Boolean); |
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procedure RefreshParams; |
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procedure SQLChanging(Sender: TObject); virtual; |
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function AdjustPosition(FCache: PChar; Offset: DWORD; |
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Origin: Integer): DWORD; |
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procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer; |
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Buffer: PChar); |
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procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar; |
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ReadOldBuffer: Boolean); |
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procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer; |
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Buffer: PChar); |
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procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar); |
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function InternalGetRecord(Buffer: PChar; GetMode: TGetMode; |
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DoCheck: Boolean): TGetResult; virtual; |
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|
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protected |
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procedure ActivateConnection; |
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function ActivateTransaction: Boolean; |
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procedure DeactivateTransaction; |
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procedure CheckDatasetClosed; |
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procedure CheckDatasetOpen; |
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function GetActiveBuf: PChar; |
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procedure InternalBatchInput(InputObject: TIBBatchInput); virtual; |
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procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual; |
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procedure InternalPrepare; virtual; |
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procedure InternalUnPrepare; virtual; |
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procedure InternalExecQuery; virtual; |
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procedure InternalRefreshRow; virtual; |
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procedure InternalSetParamsFromCursor; virtual; |
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procedure CheckNotUniDirectional; |
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|
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(* { IProviderSupport } |
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procedure PSEndTransaction(Commit: Boolean); override; |
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function PSExecuteStatement(const ASQL: string; AParams: TParams; |
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ResultSet: Pointer = nil): Integer; override; |
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function PsGetTableName: string; override; |
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function PSGetQuoteChar: string; override; |
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function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override; |
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function PSInTransaction: Boolean; override; |
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function PSIsSQLBased: Boolean; override; |
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function PSIsSQLSupported: Boolean; override; |
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procedure PSStartTransaction; override; |
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procedure PSReset; override; |
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function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override; |
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*) |
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{ TDataSet support } |
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procedure InternalInsert; override; |
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procedure InitRecord(Buffer: PChar); override; |
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procedure Disconnect; virtual; |
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function ConstraintsStored: Boolean; |
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procedure ClearCalcFields(Buffer: PChar); override; |
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function AllocRecordBuffer: PChar; override; |
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procedure DoBeforeDelete; override; |
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procedure DoBeforeEdit; override; |
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procedure DoBeforeInsert; override; |
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procedure DoAfterInsert; override; |
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procedure DoBeforePost; override; |
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procedure FreeRecordBuffer(var Buffer: PChar); override; |
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procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override; |
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function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override; |
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function GetCanModify: Boolean; override; |
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function GetDataSource: TDataSource; override; |
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< |
function GetFieldClass(FieldType: TFieldType): TFieldClass; override; |
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function GetRecNo: Integer; override; |
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function GetRecord(Buffer: PChar; GetMode: TGetMode; |
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DoCheck: Boolean): TGetResult; override; |
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function GetRecordCount: Integer; override; |
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function GetRecordSize: Word; override; |
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< |
procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override; |
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procedure InternalCancel; override; |
| 373 |
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procedure InternalClose; override; |
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procedure InternalDelete; override; |
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procedure InternalFirst; override; |
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function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual; |
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procedure InternalGotoBookmark(Bookmark: Pointer); override; |
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procedure InternalHandleException; override; |
| 379 |
< |
procedure InternalInitFieldDefs; override; |
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< |
procedure InternalInitRecord(Buffer: PChar); override; |
| 381 |
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procedure InternalLast; override; |
| 382 |
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procedure InternalOpen; override; |
| 383 |
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procedure InternalPost; override; |
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procedure InternalRefresh; override; |
| 385 |
< |
procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual; |
| 386 |
< |
procedure InternalSetToRecord(Buffer: PChar); override; |
| 387 |
< |
function IsCursorOpen: Boolean; override; |
| 388 |
< |
procedure ReQuery; |
| 389 |
< |
procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override; |
| 390 |
< |
procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override; |
| 391 |
< |
procedure SetCachedUpdates(Value: Boolean); |
| 392 |
< |
procedure SetDataSource(Value: TDataSource); |
| 393 |
< |
procedure SetFieldData(Field : TField; Buffer : Pointer); override; |
| 394 |
< |
procedure SetFieldData(Field : TField; Buffer : Pointer; |
| 395 |
< |
NativeFormat : Boolean); overload; override; |
| 396 |
< |
procedure SetRecNo(Value: Integer); override; |
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< |
|
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protected |
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< |
{Likely to be made public by descendant classes} |
| 400 |
< |
property SQLParams: TIBXSQLDA read GetSQLParams; |
| 401 |
< |
property Params: TIBXSQLDA read GetSQLParams; |
| 402 |
< |
property InternalPrepared: Boolean read FInternalPrepared; |
| 403 |
< |
property QDelete: TIBSQL read FQDelete; |
| 404 |
< |
property QInsert: TIBSQL read FQInsert; |
| 405 |
< |
property QRefresh: TIBSQL read FQRefresh; |
| 406 |
< |
property QSelect: TIBSQL read FQSelect; |
| 407 |
< |
property QModify: TIBSQL read FQModify; |
| 408 |
< |
property StatementType: TIBSQLTypes read GetStatementType; |
| 409 |
< |
property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle; |
| 410 |
< |
|
| 411 |
< |
{Likely to be made published by descendant classes} |
| 412 |
< |
property BufferChunks: Integer read FBufferChunks write SetBufferChunks; |
| 413 |
< |
property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates; |
| 414 |
< |
property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False; |
| 415 |
< |
property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField; |
| 416 |
< |
property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL; |
| 417 |
< |
property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL; |
| 418 |
< |
property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL; |
| 419 |
< |
property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL; |
| 420 |
< |
property ModifySQL: TStrings read GetModifySQL write SetModifySQL; |
| 421 |
< |
property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll; |
| 422 |
< |
property ParamCheck: Boolean read FParamCheck write FParamCheck default True; |
| 423 |
< |
|
| 424 |
< |
property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect |
| 425 |
< |
write FBeforeDatabaseDisconnect; |
| 426 |
< |
property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect |
| 427 |
< |
write FAfterDatabaseDisconnect; |
| 428 |
< |
property DatabaseFree: TNotifyEvent read FDatabaseFree |
| 429 |
< |
write FDatabaseFree; |
| 430 |
< |
property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd |
| 431 |
< |
write FBeforeTransactionEnd; |
| 432 |
< |
property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd |
| 433 |
< |
write FAfterTransactionEnd; |
| 434 |
< |
property TransactionFree: TNotifyEvent read FTransactionFree |
| 435 |
< |
write FTransactionFree; |
| 436 |
< |
|
| 437 |
< |
public |
| 438 |
< |
constructor Create(AOwner: TComponent); override; |
| 439 |
< |
destructor Destroy; override; |
| 440 |
< |
procedure ApplyUpdates; |
| 441 |
< |
function CachedUpdateStatus: TCachedUpdateStatus; |
| 442 |
< |
procedure CancelUpdates; |
| 443 |
< |
procedure FetchAll; |
| 444 |
< |
function LocateNext(const KeyFields: string; const KeyValues: Variant; |
| 445 |
< |
Options: TLocateOptions): Boolean; |
| 446 |
< |
procedure RecordModified(Value: Boolean); |
| 447 |
< |
procedure RevertRecord; |
| 448 |
< |
procedure Undelete; |
| 449 |
< |
|
| 450 |
< |
{ TDataSet support methods } |
| 451 |
< |
function BookmarkValid(Bookmark: TBookmark): Boolean; override; |
| 452 |
< |
function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override; |
| 453 |
< |
function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override; |
| 454 |
< |
function GetCurrentRecord(Buffer: PChar): Boolean; override; |
| 455 |
< |
function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override; |
| 456 |
< |
function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*) |
| 457 |
< |
function GetFieldData(Field : TField; Buffer : Pointer; |
| 458 |
< |
NativeFormat : Boolean) : Boolean; overload; override; |
| 459 |
< |
function Locate(const KeyFields: string; const KeyValues: Variant; |
| 460 |
< |
Options: TLocateOptions): Boolean; override; |
| 461 |
< |
function Lookup(const KeyFields: string; const KeyValues: Variant; |
| 462 |
< |
const ResultFields: string): Variant; override; |
| 463 |
< |
function UpdateStatus: TUpdateStatus; override; |
| 464 |
< |
function IsSequenced: Boolean; override; |
| 465 |
< |
function ParamByName(ParamName: String): TIBXSQLVAR; |
| 466 |
< |
property DBHandle: PISC_DB_HANDLE read GetDBHandle; |
| 467 |
< |
property TRHandle: PISC_TR_HANDLE read GetTRHandle; |
| 468 |
< |
property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject; |
| 469 |
< |
property UpdatesPending: Boolean read FUpdatesPending; |
| 470 |
< |
property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes |
| 471 |
< |
write SetUpdateRecordTypes; |
| 472 |
< |
|
| 473 |
< |
published |
| 474 |
< |
property Database: TIBDatabase read GetDatabase write SetDatabase; |
| 475 |
< |
property Transaction: TIBTransaction read GetTransaction |
| 476 |
< |
write SetTransaction; |
| 477 |
< |
property ForcedRefresh: Boolean read FForcedRefresh |
| 478 |
< |
write FForcedRefresh default False; |
| 479 |
< |
property AutoCalcFields; |
| 480 |
< |
|
| 481 |
< |
property AfterCancel; |
| 482 |
< |
property AfterClose; |
| 483 |
< |
property AfterDelete; |
| 484 |
< |
property AfterEdit; |
| 485 |
< |
property AfterInsert; |
| 486 |
< |
property AfterOpen; |
| 487 |
< |
property AfterPost; |
| 488 |
< |
property AfterRefresh; |
| 489 |
< |
property AfterScroll; |
| 490 |
< |
property BeforeCancel; |
| 491 |
< |
property BeforeClose; |
| 492 |
< |
property BeforeDelete; |
| 493 |
< |
property BeforeEdit; |
| 494 |
< |
property BeforeInsert; |
| 495 |
< |
property BeforeOpen; |
| 496 |
< |
property BeforePost; |
| 497 |
< |
property BeforeRefresh; |
| 498 |
< |
property BeforeScroll; |
| 499 |
< |
property OnCalcFields; |
| 500 |
< |
property OnDeleteError; |
| 501 |
< |
property OnEditError; |
| 502 |
< |
property OnNewRecord; |
| 503 |
< |
property OnPostError; |
| 504 |
< |
property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError |
| 505 |
< |
write FOnUpdateError; |
| 506 |
< |
property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord |
| 507 |
< |
write FOnUpdateRecord; |
| 508 |
< |
end; |
| 509 |
< |
|
| 510 |
< |
TIBDataSet = class(TIBCustomDataSet) |
| 511 |
< |
private |
| 512 |
< |
function GetPrepared: Boolean; |
| 513 |
< |
|
| 514 |
< |
protected |
| 515 |
< |
procedure SetFiltered(Value: Boolean); override; |
| 516 |
< |
procedure InternalOpen; override; |
| 517 |
< |
|
| 518 |
< |
public |
| 519 |
< |
procedure Prepare; |
| 520 |
< |
procedure UnPrepare; |
| 521 |
< |
procedure BatchInput(InputObject: TIBBatchInput); |
| 522 |
< |
procedure BatchOutput(OutputObject: TIBBatchOutput); |
| 523 |
< |
procedure ExecSQL; |
| 524 |
< |
|
| 525 |
< |
public |
| 526 |
< |
property Params; |
| 527 |
< |
property Prepared : Boolean read GetPrepared; |
| 528 |
< |
property QDelete; |
| 529 |
< |
property QInsert; |
| 530 |
< |
property QRefresh; |
| 531 |
< |
property QSelect; |
| 532 |
< |
property QModify; |
| 533 |
< |
property StatementType; |
| 534 |
< |
property SelectStmtHandle; |
| 535 |
< |
|
| 536 |
< |
published |
| 537 |
< |
{ TIBCustomDataSet } |
| 538 |
< |
property BufferChunks; |
| 539 |
< |
property CachedUpdates; |
| 540 |
< |
property DeleteSQL; |
| 541 |
< |
property InsertSQL; |
| 542 |
< |
property RefreshSQL; |
| 543 |
< |
property SelectSQL; |
| 544 |
< |
property ModifySQL; |
| 545 |
< |
property GeneratorField; |
| 546 |
< |
property ParamCheck; |
| 547 |
< |
property UniDirectional; |
| 548 |
< |
property Filtered; |
| 549 |
< |
|
| 550 |
< |
property BeforeDatabaseDisconnect; |
| 551 |
< |
property AfterDatabaseDisconnect; |
| 552 |
< |
property DatabaseFree; |
| 553 |
< |
property BeforeTransactionEnd; |
| 554 |
< |
property AfterTransactionEnd; |
| 555 |
< |
property TransactionFree; |
| 556 |
< |
|
| 557 |
< |
{ TIBDataSet } |
| 558 |
< |
property Active; |
| 559 |
< |
property AutoCalcFields; |
| 560 |
< |
property DataSource read GetDataSource write SetDataSource; |
| 561 |
< |
|
| 562 |
< |
property AfterCancel; |
| 563 |
< |
property AfterClose; |
| 564 |
< |
property AfterDelete; |
| 565 |
< |
property AfterEdit; |
| 566 |
< |
property AfterInsert; |
| 567 |
< |
property AfterOpen; |
| 568 |
< |
property AfterPost; |
| 569 |
< |
property AfterScroll; |
| 570 |
< |
property BeforeCancel; |
| 571 |
< |
property BeforeClose; |
| 572 |
< |
property BeforeDelete; |
| 573 |
< |
property BeforeEdit; |
| 574 |
< |
property BeforeInsert; |
| 575 |
< |
property BeforeOpen; |
| 576 |
< |
property BeforePost; |
| 577 |
< |
property BeforeScroll; |
| 578 |
< |
property OnCalcFields; |
| 579 |
< |
property OnDeleteError; |
| 580 |
< |
property OnEditError; |
| 581 |
< |
property OnFilterRecord; |
| 582 |
< |
property OnNewRecord; |
| 583 |
< |
property OnPostError; |
| 584 |
< |
end; |
| 585 |
< |
|
| 586 |
< |
{ TIBDSBlobStream } |
| 587 |
< |
TIBDSBlobStream = class(TStream) |
| 588 |
< |
protected |
| 589 |
< |
FField: TField; |
| 590 |
< |
FBlobStream: TIBBlobStream; |
| 591 |
< |
public |
| 592 |
< |
constructor Create(AField: TField; ABlobStream: TIBBlobStream; |
| 593 |
< |
Mode: TBlobStreamMode); |
| 594 |
< |
function Read(var Buffer; Count: Longint): Longint; override; |
| 595 |
< |
function Seek(Offset: Longint; Origin: Word): Longint; override; |
| 596 |
< |
procedure SetSize(NewSize: Longint); override; |
| 597 |
< |
function Write(const Buffer; Count: Longint): Longint; override; |
| 598 |
< |
end; |
| 599 |
< |
|
| 600 |
< |
const |
| 601 |
< |
DefaultFieldClasses: array[TFieldType] of TFieldClass = ( |
| 602 |
< |
nil, { ftUnknown } |
| 603 |
< |
TIBStringField, { ftString } |
| 604 |
< |
TSmallintField, { ftSmallint } |
| 605 |
< |
TIntegerField, { ftInteger } |
| 606 |
< |
TWordField, { ftWord } |
| 607 |
< |
TBooleanField, { ftBoolean } |
| 608 |
< |
TFloatField, { ftFloat } |
| 609 |
< |
TCurrencyField, { ftCurrency } |
| 610 |
< |
TIBBCDField, { ftBCD } |
| 611 |
< |
TDateField, { ftDate } |
| 612 |
< |
TTimeField, { ftTime } |
| 613 |
< |
TDateTimeField, { ftDateTime } |
| 614 |
< |
TBytesField, { ftBytes } |
| 615 |
< |
TVarBytesField, { ftVarBytes } |
| 616 |
< |
TAutoIncField, { ftAutoInc } |
| 617 |
< |
TBlobField, { ftBlob } |
| 618 |
< |
TMemoField, { ftMemo } |
| 619 |
< |
TGraphicField, { ftGraphic } |
| 620 |
< |
TBlobField, { ftFmtMemo } |
| 621 |
< |
TBlobField, { ftParadoxOle } |
| 622 |
< |
TBlobField, { ftDBaseOle } |
| 623 |
< |
TBlobField, { ftTypedBinary } |
| 624 |
< |
nil, { ftCursor } |
| 625 |
< |
TStringField, { ftFixedChar } |
| 626 |
< |
TWideStringField, { ftWideString } |
| 627 |
< |
TLargeIntField, { ftLargeInt } |
| 628 |
< |
nil, { ftADT } |
| 629 |
< |
nil, { ftArray } |
| 630 |
< |
nil, { ftReference } |
| 631 |
< |
nil, { ftDataSet } |
| 632 |
< |
TBlobField, { ftOraBlob } |
| 633 |
< |
TMemoField, { ftOraClob } |
| 634 |
< |
TVariantField, { ftVariant } |
| 635 |
< |
nil, { ftInterface } |
| 636 |
< |
nil, { ftIDispatch } |
| 637 |
< |
TGuidField, { ftGuid } |
| 638 |
< |
TDateTimeField, {ftTimestamp} |
| 639 |
< |
TIBBCDField, {ftFMTBcd} |
| 640 |
< |
nil, {ftFixedWideChar} |
| 641 |
< |
TWideMemoField); {ftWideMemo} |
| 642 |
< |
(* |
| 643 |
< |
TADTField, { ftADT } |
| 644 |
< |
TArrayField, { ftArray } |
| 645 |
< |
TReferenceField, { ftReference } |
| 646 |
< |
TDataSetField, { ftDataSet } |
| 647 |
< |
TBlobField, { ftOraBlob } |
| 648 |
< |
TMemoField, { ftOraClob } |
| 649 |
< |
TVariantField, { ftVariant } |
| 650 |
< |
TInterfaceField, { ftInterface } |
| 651 |
< |
TIDispatchField, { ftIDispatch } |
| 652 |
< |
TGuidField); { ftGuid } *) |
| 653 |
< |
(*var |
| 654 |
< |
CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*) |
| 655 |
< |
|
| 656 |
< |
implementation |
| 657 |
< |
|
| 658 |
< |
uses IBIntf, Variants, FmtBCD; |
| 659 |
< |
|
| 660 |
< |
const FILE_BEGIN = 0; |
| 661 |
< |
FILE_CURRENT = 1; |
| 662 |
< |
FILE_END = 2; |
| 663 |
< |
|
| 664 |
< |
type |
| 665 |
< |
|
| 666 |
< |
TFieldNode = class(TObject) |
| 667 |
< |
protected |
| 668 |
< |
FieldName : String; |
| 669 |
< |
COMPUTED_BLR : Boolean; |
| 670 |
< |
DEFAULT_VALUE : boolean; |
| 671 |
< |
NextField : TFieldNode; |
| 672 |
< |
end; |
| 673 |
< |
|
| 674 |
< |
TRelationNode = class(TObject) |
| 675 |
< |
protected |
| 676 |
< |
RelationName : String; |
| 677 |
< |
FieldNodes : TFieldNode; |
| 678 |
< |
NextRelation : TRelationNode; |
| 679 |
< |
end; |
| 680 |
< |
|
| 681 |
< |
|
| 682 |
< |
{ TIBStringField} |
| 683 |
< |
|
| 684 |
< |
constructor TIBStringField.Create(AOwner: TComponent); |
| 685 |
< |
begin |
| 686 |
< |
inherited Create(AOwner); |
| 687 |
< |
end; |
| 688 |
< |
|
| 689 |
< |
class procedure TIBStringField.CheckTypeSize(Value: Integer); |
| 690 |
< |
begin |
| 691 |
< |
{ don't check string size. all sizes valid } |
| 692 |
< |
end; |
| 693 |
< |
|
| 694 |
< |
function TIBStringField.GetAsString: string; |
| 695 |
< |
begin |
| 696 |
< |
if not GetValue(Result) then Result := ''; |
| 697 |
< |
end; |
| 698 |
< |
|
| 699 |
< |
function TIBStringField.GetAsVariant: Variant; |
| 700 |
< |
var |
| 701 |
< |
S: string; |
| 702 |
< |
begin |
| 703 |
< |
if GetValue(S) then Result := S else Result := Null; |
| 704 |
< |
end; |
| 705 |
< |
|
| 706 |
< |
function TIBStringField.GetValue(var Value: string): Boolean; |
| 707 |
< |
var |
| 708 |
< |
Buffer: PChar; |
| 709 |
< |
begin |
| 710 |
< |
Buffer := nil; |
| 711 |
< |
IBAlloc(Buffer, 0, Size + 1); |
| 712 |
< |
try |
| 713 |
< |
Result := GetData(Buffer); |
| 714 |
< |
if Result then |
| 715 |
< |
begin |
| 716 |
< |
Value := string(Buffer); |
| 717 |
< |
if Transliterate and (Value <> '') then |
| 718 |
< |
DataSet.Translate(PChar(Value), PChar(Value), False); |
| 719 |
< |
end |
| 720 |
< |
finally |
| 721 |
< |
FreeMem(Buffer); |
| 722 |
< |
end; |
| 723 |
< |
end; |
| 724 |
< |
|
| 725 |
< |
procedure TIBStringField.SetAsString(const Value: string); |
| 726 |
< |
var |
| 727 |
< |
Buffer: PChar; |
| 728 |
< |
begin |
| 729 |
< |
Buffer := nil; |
| 730 |
< |
IBAlloc(Buffer, 0, Size + 1); |
| 731 |
< |
try |
| 732 |
< |
StrLCopy(Buffer, PChar(Value), Size); |
| 733 |
< |
if Transliterate then |
| 734 |
< |
DataSet.Translate(Buffer, Buffer, True); |
| 735 |
< |
SetData(Buffer); |
| 736 |
< |
finally |
| 737 |
< |
FreeMem(Buffer); |
| 738 |
< |
end; |
| 739 |
< |
end; |
| 740 |
< |
|
| 741 |
< |
{ TIBBCDField } |
| 742 |
< |
|
| 743 |
< |
constructor TIBBCDField.Create(AOwner: TComponent); |
| 744 |
< |
begin |
| 745 |
< |
inherited Create(AOwner); |
| 746 |
< |
SetDataType(ftBCD); |
| 747 |
< |
Size := 8; |
| 748 |
< |
end; |
| 749 |
< |
|
| 750 |
< |
class procedure TIBBCDField.CheckTypeSize(Value: Integer); |
| 751 |
< |
begin |
| 752 |
< |
{ No need to check as the base type is currency, not BCD } |
| 753 |
< |
end; |
| 754 |
< |
|
| 755 |
< |
function TIBBCDField.GetAsCurrency: Currency; |
| 756 |
< |
begin |
| 757 |
< |
if not GetValue(Result) then |
| 758 |
< |
Result := 0; |
| 759 |
< |
end; |
| 760 |
< |
|
| 761 |
< |
function TIBBCDField.GetAsString: string; |
| 762 |
< |
var |
| 763 |
< |
C: System.Currency; |
| 764 |
< |
begin |
| 765 |
< |
if GetValue(C) then |
| 766 |
< |
Result := CurrToStr(C) |
| 767 |
< |
else |
| 768 |
< |
Result := ''; |
| 769 |
< |
end; |
| 770 |
< |
|
| 771 |
< |
function TIBBCDField.GetAsVariant: Variant; |
| 772 |
< |
var |
| 773 |
< |
C: System.Currency; |
| 774 |
< |
begin |
| 775 |
< |
if GetValue(C) then |
| 776 |
< |
Result := C |
| 777 |
< |
else |
| 778 |
< |
Result := Null; |
| 779 |
< |
end; |
| 780 |
< |
|
| 781 |
< |
function TIBBCDField.GetDataSize: Integer; |
| 782 |
< |
begin |
| 783 |
< |
{$IFDEF TBCDFIELD_IS_BCD} |
| 784 |
< |
Result := 8; |
| 785 |
< |
{$ELSE} |
| 786 |
< |
Result := inherited GetDataSize |
| 787 |
< |
{$ENDIF} |
| 788 |
< |
end; |
| 789 |
< |
|
| 790 |
< |
{ TIBDataLink } |
| 791 |
< |
|
| 792 |
< |
constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet); |
| 793 |
< |
begin |
| 794 |
< |
inherited Create; |
| 795 |
< |
FDataSet := ADataSet; |
| 796 |
< |
end; |
| 797 |
< |
|
| 798 |
< |
destructor TIBDataLink.Destroy; |
| 799 |
< |
begin |
| 800 |
< |
FDataSet.FDataLink := nil; |
| 801 |
< |
inherited Destroy; |
| 802 |
< |
end; |
| 803 |
< |
|
| 804 |
< |
|
| 805 |
< |
procedure TIBDataLink.ActiveChanged; |
| 806 |
< |
begin |
| 807 |
< |
if FDataSet.Active then |
| 808 |
< |
FDataSet.RefreshParams; |
| 809 |
< |
end; |
| 810 |
< |
|
| 811 |
< |
|
| 812 |
< |
function TIBDataLink.GetDetailDataSet: TDataSet; |
| 813 |
< |
begin |
| 814 |
< |
Result := FDataSet; |
| 815 |
< |
end; |
| 816 |
< |
|
| 817 |
< |
procedure TIBDataLink.RecordChanged(Field: TField); |
| 818 |
< |
begin |
| 819 |
< |
if (Field = nil) and FDataSet.Active then |
| 820 |
< |
FDataSet.RefreshParams; |
| 821 |
< |
end; |
| 822 |
< |
|
| 823 |
< |
procedure TIBDataLink.CheckBrowseMode; |
| 824 |
< |
begin |
| 825 |
< |
if FDataSet.Active then |
| 826 |
< |
FDataSet.CheckBrowseMode; |
| 827 |
< |
end; |
| 828 |
< |
|
| 829 |
< |
{ TIBCustomDataSet } |
| 830 |
< |
|
| 831 |
< |
constructor TIBCustomDataSet.Create(AOwner: TComponent); |
| 832 |
< |
begin |
| 833 |
< |
inherited Create(AOwner); |
| 834 |
< |
FIBLoaded := False; |
| 835 |
< |
CheckIBLoaded; |
| 836 |
< |
FIBLoaded := True; |
| 837 |
< |
FBase := TIBBase.Create(Self); |
| 838 |
< |
FCurrentRecord := -1; |
| 839 |
< |
FDeletedRecords := 0; |
| 840 |
< |
FUniDirectional := False; |
| 841 |
< |
FBufferChunks := BufferCacheSize; |
| 842 |
< |
FBlobStreamList := TList.Create; |
| 843 |
< |
FGeneratorField := TIBGenerator.Create(self); |
| 844 |
< |
FDataLink := TIBDataLink.Create(Self); |
| 845 |
< |
FQDelete := TIBSQL.Create(Self); |
| 846 |
< |
FQDelete.OnSQLChanging := SQLChanging; |
| 847 |
< |
FQDelete.GoToFirstRecordOnExecute := False; |
| 848 |
< |
FQInsert := TIBSQL.Create(Self); |
| 849 |
< |
FQInsert.OnSQLChanging := SQLChanging; |
| 850 |
< |
FQInsert.GoToFirstRecordOnExecute := False; |
| 851 |
< |
FQRefresh := TIBSQL.Create(Self); |
| 852 |
< |
FQRefresh.OnSQLChanging := SQLChanging; |
| 853 |
< |
FQRefresh.GoToFirstRecordOnExecute := False; |
| 854 |
< |
FQSelect := TIBSQL.Create(Self); |
| 855 |
< |
FQSelect.OnSQLChanging := SQLChanging; |
| 856 |
< |
FQSelect.GoToFirstRecordOnExecute := False; |
| 857 |
< |
FQModify := TIBSQL.Create(Self); |
| 858 |
< |
FQModify.OnSQLChanging := SQLChanging; |
| 859 |
< |
FQModify.GoToFirstRecordOnExecute := False; |
| 860 |
< |
FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted]; |
| 861 |
< |
FParamCheck := True; |
| 862 |
< |
FForcedRefresh := False; |
| 863 |
< |
{Bookmark Size is Integer for IBX} |
| 864 |
< |
BookmarkSize := SizeOf(Integer); |
| 865 |
< |
FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect; |
| 866 |
< |
FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect; |
| 867 |
< |
FBase.OnDatabaseFree := DoDatabaseFree; |
| 868 |
< |
FBase.BeforeTransactionEnd := DoBeforeTransactionEnd; |
| 869 |
< |
FBase.AfterTransactionEnd := DoAfterTransactionEnd; |
| 870 |
< |
FBase.OnTransactionFree := DoTransactionFree; |
| 871 |
< |
if AOwner is TIBDatabase then |
| 872 |
< |
Database := TIBDatabase(AOwner) |
| 873 |
< |
else |
| 874 |
< |
if AOwner is TIBTransaction then |
| 875 |
< |
Transaction := TIBTransaction(AOwner); |
| 876 |
< |
end; |
| 877 |
< |
|
| 878 |
< |
destructor TIBCustomDataSet.Destroy; |
| 879 |
< |
begin |
| 880 |
< |
if Active then Active := false; |
| 881 |
< |
if FIBLoaded then |
| 882 |
< |
begin |
| 883 |
< |
if assigned(FGeneratorField) then FGeneratorField.Free; |
| 884 |
< |
FDataLink.Free; |
| 885 |
< |
FBase.Free; |
| 886 |
< |
ClearBlobCache; |
| 887 |
< |
FBlobStreamList.Free; |
| 888 |
< |
FreeMem(FBufferCache); |
| 889 |
< |
FBufferCache := nil; |
| 890 |
< |
FreeMem(FOldBufferCache); |
| 891 |
< |
FOldBufferCache := nil; |
| 892 |
< |
FCacheSize := 0; |
| 893 |
< |
FOldCacheSize := 0; |
| 894 |
< |
FMappedFieldPosition := nil; |
| 895 |
< |
end; |
| 896 |
< |
inherited Destroy; |
| 897 |
< |
end; |
| 898 |
< |
|
| 899 |
< |
function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): |
| 900 |
< |
TGetResult; |
| 901 |
< |
begin |
| 902 |
< |
while not IsVisible(Buffer) do |
| 903 |
< |
begin |
| 904 |
< |
if GetMode = gmPrior then |
| 905 |
< |
begin |
| 906 |
< |
Dec(FCurrentRecord); |
| 907 |
< |
if FCurrentRecord = -1 then |
| 908 |
< |
begin |
| 909 |
< |
result := grBOF; |
| 910 |
< |
exit; |
| 911 |
< |
end; |
| 912 |
< |
ReadRecordCache(FCurrentRecord, Buffer, False); |
| 913 |
< |
end |
| 914 |
< |
else begin |
| 915 |
< |
Inc(FCurrentRecord); |
| 916 |
< |
if (FCurrentRecord = FRecordCount) then |
| 917 |
< |
begin |
| 918 |
< |
if (not FQSelect.EOF) and (FQSelect.Next <> nil) then |
| 919 |
< |
begin |
| 920 |
< |
FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer); |
| 921 |
< |
Inc(FRecordCount); |
| 922 |
< |
end |
| 923 |
< |
else begin |
| 924 |
< |
result := grEOF; |
| 925 |
< |
exit; |
| 926 |
< |
end; |
| 927 |
< |
end |
| 928 |
< |
else |
| 929 |
< |
ReadRecordCache(FCurrentRecord, Buffer, False); |
| 930 |
< |
end; |
| 931 |
< |
end; |
| 932 |
< |
result := grOK; |
| 933 |
< |
end; |
| 934 |
< |
|
| 935 |
< |
procedure TIBCustomDataSet.ApplyUpdates; |
| 936 |
< |
var |
| 937 |
< |
{$IF FPC_FULLVERSION > 20600 } |
| 938 |
< |
CurBookmark: TBookmark; |
| 939 |
< |
{$ELSE} |
| 940 |
< |
CurBookmark: string; |
| 941 |
< |
{$ENDIF} |
| 942 |
< |
Buffer: PRecordData; |
| 943 |
< |
CurUpdateTypes: TIBUpdateRecordTypes; |
| 944 |
< |
UpdateAction: TIBUpdateAction; |
| 945 |
< |
UpdateKind: TUpdateKind; |
| 946 |
< |
bRecordsSkipped: Boolean; |
| 947 |
< |
|
| 948 |
< |
procedure GetUpdateKind; |
| 949 |
< |
begin |
| 950 |
< |
case Buffer^.rdCachedUpdateStatus of |
| 951 |
< |
cusModified: |
| 952 |
< |
UpdateKind := ukModify; |
| 953 |
< |
cusInserted: |
| 954 |
< |
UpdateKind := ukInsert; |
| 955 |
< |
else |
| 956 |
< |
UpdateKind := ukDelete; |
| 957 |
< |
end; |
| 958 |
< |
end; |
| 959 |
< |
|
| 960 |
< |
procedure ResetBufferUpdateStatus; |
| 961 |
< |
begin |
| 962 |
< |
case Buffer^.rdCachedUpdateStatus of |
| 963 |
< |
cusModified: |
| 964 |
< |
begin |
| 965 |
< |
PRecordData(Buffer)^.rdUpdateStatus := usUnmodified; |
| 966 |
< |
PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified; |
| 967 |
< |
end; |
| 968 |
< |
cusInserted: |
| 969 |
< |
begin |
| 970 |
< |
PRecordData(Buffer)^.rdUpdateStatus := usUnmodified; |
| 971 |
< |
PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified; |
| 972 |
< |
end; |
| 973 |
< |
cusDeleted: |
| 974 |
< |
begin |
| 975 |
< |
PRecordData(Buffer)^.rdUpdateStatus := usDeleted; |
| 976 |
< |
PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified; |
| 977 |
< |
end; |
| 978 |
< |
end; |
| 979 |
< |
WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer)); |
| 980 |
< |
end; |
| 981 |
< |
|
| 982 |
< |
procedure UpdateUsingOnUpdateRecord; |
| 983 |
< |
begin |
| 984 |
< |
UpdateAction := uaFail; |
| 985 |
< |
try |
| 986 |
< |
FOnUpdateRecord(Self, UpdateKind, UpdateAction); |
| 987 |
< |
except |
| 988 |
< |
on E: Exception do |
| 989 |
< |
begin |
| 990 |
< |
if (E is EDatabaseError) and Assigned(FOnUpdateError) then |
| 991 |
< |
FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction); |
| 992 |
< |
if UpdateAction = uaFail then |
| 993 |
< |
raise; |
| 994 |
< |
end; |
| 995 |
< |
end; |
| 996 |
< |
end; |
| 997 |
< |
|
| 998 |
< |
procedure UpdateUsingUpdateObject; |
| 999 |
< |
begin |
| 1000 |
< |
try |
| 1001 |
< |
FUpdateObject.Apply(UpdateKind,PChar(Buffer)); |
| 1002 |
< |
ResetBufferUpdateStatus; |
| 1003 |
< |
except |
| 1004 |
< |
on E: Exception do |
| 1005 |
< |
if (E is EDatabaseError) and Assigned(FOnUpdateError) then |
| 1006 |
< |
FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction); |
| 1007 |
< |
end; |
| 1008 |
< |
end; |
| 1009 |
< |
|
| 1010 |
< |
procedure UpdateUsingInternalquery; |
| 1011 |
< |
begin |
| 1012 |
< |
try |
| 1013 |
< |
case Buffer^.rdCachedUpdateStatus of |
| 1014 |
< |
cusModified: |
| 1015 |
< |
InternalPostRecord(FQModify, Buffer); |
| 1016 |
< |
cusInserted: |
| 1017 |
< |
InternalPostRecord(FQInsert, Buffer); |
| 1018 |
< |
cusDeleted: |
| 1019 |
< |
InternalDeleteRecord(FQDelete, Buffer); |
| 1020 |
< |
end; |
| 1021 |
< |
except |
| 1022 |
< |
on E: EIBError do begin |
| 1023 |
< |
UpdateAction := uaFail; |
| 1024 |
< |
if Assigned(FOnUpdateError) then |
| 1025 |
< |
FOnUpdateError(Self, E, UpdateKind, UpdateAction); |
| 1026 |
< |
case UpdateAction of |
| 1027 |
< |
uaFail: raise; |
| 1028 |
< |
uaAbort: SysUtils.Abort; |
| 1029 |
< |
uaSkip: bRecordsSkipped := True; |
| 1030 |
< |
end; |
| 1031 |
< |
end; |
| 1032 |
< |
end; |
| 1033 |
< |
end; |
| 1034 |
< |
|
| 1035 |
< |
begin |
| 1036 |
< |
if State in [dsEdit, dsInsert] then |
| 1037 |
< |
Post; |
| 1038 |
< |
FBase.CheckDatabase; |
| 1039 |
< |
FBase.CheckTransaction; |
| 1040 |
< |
DisableControls; |
| 1041 |
< |
CurBookmark := Bookmark; |
| 1042 |
< |
CurUpdateTypes := FUpdateRecordTypes; |
| 1043 |
< |
FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted]; |
| 1044 |
< |
try |
| 1045 |
< |
First; |
| 1046 |
< |
bRecordsSkipped := False; |
| 1047 |
< |
while not EOF do |
| 1048 |
< |
begin |
| 1049 |
< |
Buffer := PRecordData(GetActiveBuf); |
| 1050 |
< |
GetUpdateKind; |
| 1051 |
< |
UpdateAction := uaApply; |
| 1052 |
< |
if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then |
| 1053 |
< |
begin |
| 1054 |
< |
if (Assigned(FOnUpdateRecord)) then |
| 1055 |
< |
UpdateUsingOnUpdateRecord |
| 1056 |
< |
else |
| 1057 |
< |
if Assigned(FUpdateObject) then |
| 1058 |
< |
UpdateUsingUpdateObject; |
| 1059 |
< |
case UpdateAction of |
| 1060 |
< |
uaFail: |
| 1061 |
< |
IBError(ibxeUserAbort, [nil]); |
| 1062 |
< |
uaAbort: |
| 1063 |
< |
SysUtils.Abort; |
| 1064 |
< |
uaApplied: |
| 1065 |
< |
ResetBufferUpdateStatus; |
| 1066 |
< |
uaSkip: |
| 1067 |
< |
bRecordsSkipped := True; |
| 1068 |
< |
uaRetry: |
| 1069 |
< |
Continue; |
| 1070 |
< |
end; |
| 1071 |
< |
end; |
| 1072 |
< |
if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then |
| 1073 |
< |
begin |
| 1074 |
< |
UpdateUsingInternalquery; |
| 1075 |
< |
UpdateAction := uaApplied; |
| 1076 |
< |
end; |
| 1077 |
< |
Next; |
| 1078 |
< |
end; |
| 1079 |
< |
FUpdatesPending := bRecordsSkipped; |
| 1080 |
< |
finally |
| 1081 |
< |
FUpdateRecordTypes := CurUpdateTypes; |
| 1082 |
< |
Bookmark := CurBookmark; |
| 1083 |
< |
EnableControls; |
| 1084 |
< |
end; |
| 1085 |
< |
end; |
| 1086 |
< |
|
| 1087 |
< |
procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput); |
| 1088 |
< |
begin |
| 1089 |
< |
FQSelect.BatchInput(InputObject); |
| 1090 |
< |
end; |
| 1091 |
< |
|
| 1092 |
< |
procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput); |
| 1093 |
< |
var |
| 1094 |
< |
Qry: TIBSQL; |
| 1095 |
< |
begin |
| 1096 |
< |
Qry := TIBSQL.Create(Self); |
| 1097 |
< |
try |
| 1098 |
< |
Qry.Database := FBase.Database; |
| 1099 |
< |
Qry.Transaction := FBase.Transaction; |
| 1100 |
< |
Qry.SQL.Assign(FQSelect.SQL); |
| 1101 |
< |
Qry.BatchOutput(OutputObject); |
| 1102 |
< |
finally |
| 1103 |
< |
Qry.Free; |
| 1104 |
< |
end; |
| 1105 |
< |
end; |
| 1106 |
< |
|
| 1107 |
< |
procedure TIBCustomDataSet.CancelUpdates; |
| 1108 |
< |
var |
| 1109 |
< |
CurUpdateTypes: TIBUpdateRecordTypes; |
| 1110 |
< |
begin |
| 1111 |
< |
if State in [dsEdit, dsInsert] then |
| 1112 |
< |
Post; |
| 1113 |
< |
if FCachedUpdates and FUpdatesPending then |
| 1114 |
< |
begin |
| 1115 |
< |
DisableControls; |
| 1116 |
< |
CurUpdateTypes := UpdateRecordTypes; |
| 1117 |
< |
UpdateRecordTypes := [cusModified, cusInserted, cusDeleted]; |
| 1118 |
< |
try |
| 1119 |
< |
First; |
| 1120 |
< |
while not EOF do |
| 1121 |
< |
begin |
| 1122 |
< |
if UpdateStatus = usInserted then |
| 1123 |
< |
RevertRecord |
| 1124 |
< |
else |
| 1125 |
< |
begin |
| 1126 |
< |
RevertRecord; |
| 1127 |
< |
Next; |
| 1128 |
< |
end; |
| 1129 |
< |
end; |
| 1130 |
< |
finally |
| 1131 |
< |
UpdateRecordTypes := CurUpdateTypes; |
| 1132 |
< |
First; |
| 1133 |
< |
FUpdatesPending := False; |
| 1134 |
< |
EnableControls; |
| 1135 |
< |
end; |
| 1136 |
< |
end; |
| 1137 |
< |
end; |
| 1138 |
< |
|
| 1139 |
< |
procedure TIBCustomDataSet.ActivateConnection; |
| 1140 |
< |
begin |
| 1141 |
< |
if not Assigned(Database) then |
| 1142 |
< |
IBError(ibxeDatabaseNotAssigned, [nil]); |
| 1143 |
< |
if not Assigned(Transaction) then |
| 1144 |
< |
IBError(ibxeTransactionNotAssigned, [nil]); |
| 1145 |
< |
if not Database.Connected then Database.Open; |
| 1146 |
< |
end; |
| 1147 |
< |
|
| 1148 |
< |
function TIBCustomDataSet.ActivateTransaction: Boolean; |
| 1149 |
< |
begin |
| 1150 |
< |
Result := False; |
| 1151 |
< |
if not Assigned(Transaction) then |
| 1152 |
< |
IBError(ibxeTransactionNotAssigned, [nil]); |
| 1153 |
< |
if not Transaction.Active then |
| 1154 |
< |
begin |
| 1155 |
< |
Result := True; |
| 1156 |
< |
Transaction.StartTransaction; |
| 1157 |
< |
FDidActivate := True; |
| 1158 |
< |
end; |
| 1159 |
< |
end; |
| 1160 |
< |
|
| 1161 |
< |
procedure TIBCustomDataSet.DeactivateTransaction; |
| 1162 |
< |
var |
| 1163 |
< |
i: Integer; |
| 1164 |
< |
begin |
| 1165 |
< |
if not Assigned(Transaction) then |
| 1166 |
< |
IBError(ibxeTransactionNotAssigned, [nil]); |
| 1167 |
< |
with Transaction do |
| 1168 |
< |
begin |
| 1169 |
< |
for i := 0 to SQLObjectCount - 1 do |
| 1170 |
< |
begin |
| 1171 |
< |
if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then |
| 1172 |
< |
begin |
| 1173 |
< |
if TDataSet(SQLObjects[i].owner).Active then |
| 1174 |
< |
begin |
| 1175 |
< |
FDidActivate := False; |
| 1176 |
< |
exit; |
| 1177 |
< |
end; |
| 1178 |
< |
end; |
| 1179 |
< |
end; |
| 1180 |
< |
end; |
| 1181 |
< |
FInternalPrepared := False; |
| 1182 |
< |
if Transaction.InTransaction then |
| 1183 |
< |
Transaction.Commit; |
| 1184 |
< |
FDidActivate := False; |
| 1185 |
< |
end; |
| 1186 |
< |
|
| 1187 |
< |
procedure TIBCustomDataSet.CheckDatasetClosed; |
| 1188 |
< |
begin |
| 1189 |
< |
if FOpen then |
| 1190 |
< |
IBError(ibxeDatasetOpen, [nil]); |
| 1191 |
< |
end; |
| 1192 |
< |
|
| 1193 |
< |
procedure TIBCustomDataSet.CheckDatasetOpen; |
| 1194 |
< |
begin |
| 1195 |
< |
if not FOpen then |
| 1196 |
< |
IBError(ibxeDatasetClosed, [nil]); |
| 1197 |
< |
end; |
| 1198 |
< |
|
| 1199 |
< |
procedure TIBCustomDataSet.CheckNotUniDirectional; |
| 1200 |
< |
begin |
| 1201 |
< |
if UniDirectional then |
| 1202 |
< |
IBError(ibxeDataSetUniDirectional, [nil]); |
| 1203 |
< |
end; |
| 1204 |
< |
|
| 1205 |
< |
procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer); |
| 1206 |
< |
begin |
| 1207 |
< |
with PRecordData(Buffer)^ do |
| 1208 |
< |
if (State = dsInsert) and (not Modified) then |
| 1209 |
< |
begin |
| 1210 |
< |
rdRecordNumber := FRecordCount; |
| 1211 |
< |
FCurrentRecord := FRecordCount; |
| 1212 |
< |
end; |
| 1213 |
< |
end; |
| 1214 |
< |
|
| 1215 |
< |
function TIBCustomDataSet.CanEdit: Boolean; |
| 1216 |
< |
var |
| 1217 |
< |
Buff: PRecordData; |
| 1218 |
< |
begin |
| 1219 |
< |
Buff := PRecordData(GetActiveBuf); |
| 1220 |
< |
result := (FQModify.SQL.Text <> '') or |
| 1221 |
< |
(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or |
| 1222 |
< |
((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and |
| 1223 |
< |
(FCachedUpdates)); |
| 1224 |
< |
end; |
| 1225 |
< |
|
| 1226 |
< |
function TIBCustomDataSet.CanInsert: Boolean; |
| 1227 |
< |
begin |
| 1228 |
< |
result := (FQInsert.SQL.Text <> '') or |
| 1229 |
< |
(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> '')); |
| 1230 |
< |
end; |
| 1231 |
< |
|
| 1232 |
< |
function TIBCustomDataSet.CanDelete: Boolean; |
| 1233 |
< |
begin |
| 1234 |
< |
if (FQDelete.SQL.Text <> '') or |
| 1235 |
< |
(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then |
| 1236 |
< |
result := True |
| 1237 |
< |
else |
| 1238 |
< |
result := False; |
| 1239 |
< |
end; |
| 1240 |
< |
|
| 1241 |
< |
function TIBCustomDataSet.CanRefresh: Boolean; |
| 1242 |
< |
begin |
| 1243 |
< |
result := (FQRefresh.SQL.Text <> '') or |
| 1244 |
< |
(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')); |
| 1245 |
< |
end; |
| 1246 |
< |
|
| 1247 |
< |
procedure TIBCustomDataSet.CheckEditState; |
| 1248 |
< |
begin |
| 1249 |
< |
case State of |
| 1250 |
< |
{ Check all the wsEditMode types } |
| 1251 |
< |
dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter, |
| 1252 |
< |
dsNewValue, dsInternalCalc : |
| 1253 |
< |
begin |
| 1254 |
< |
if (State in [dsEdit]) and (not CanEdit) then |
| 1255 |
< |
IBError(ibxeCannotUpdate, [nil]); |
| 1256 |
< |
if (State in [dsInsert]) and (not CanInsert) then |
| 1257 |
< |
IBError(ibxeCannotInsert, [nil]); |
| 1258 |
< |
end; |
| 1259 |
< |
else |
| 1260 |
< |
IBError(ibxeNotEditing, []) |
| 1261 |
< |
end; |
| 1262 |
< |
end; |
| 1263 |
< |
|
| 1264 |
< |
procedure TIBCustomDataSet.ClearBlobCache; |
| 1265 |
< |
var |
| 1266 |
< |
i: Integer; |
| 1267 |
< |
begin |
| 1268 |
< |
for i := 0 to FBlobStreamList.Count - 1 do |
| 1269 |
< |
begin |
| 1270 |
< |
TIBBlobStream(FBlobStreamList[i]).Free; |
| 1271 |
< |
FBlobStreamList[i] := nil; |
| 1272 |
< |
end; |
| 1273 |
< |
FBlobStreamList.Pack; |
| 1274 |
< |
end; |
| 1275 |
< |
|
| 1276 |
< |
procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer); |
| 1277 |
< |
begin |
| 1278 |
< |
Move(Source^, Dest^, FRecordBufferSize); |
| 1279 |
< |
end; |
| 1280 |
< |
|
| 1281 |
< |
procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject); |
| 1282 |
< |
begin |
| 1283 |
< |
if Active then |
| 1284 |
< |
Active := False; |
| 1285 |
< |
FInternalPrepared := False; |
| 1286 |
< |
if Assigned(FBeforeDatabaseDisconnect) then |
| 1287 |
< |
FBeforeDatabaseDisconnect(Sender); |
| 1288 |
< |
end; |
| 1289 |
< |
|
| 1290 |
< |
procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject); |
| 1291 |
< |
begin |
| 1292 |
< |
if Assigned(FAfterDatabaseDisconnect) then |
| 1293 |
< |
FAfterDatabaseDisconnect(Sender); |
| 1294 |
< |
end; |
| 1295 |
< |
|
| 1296 |
< |
procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject); |
| 1297 |
< |
begin |
| 1298 |
< |
if Assigned(FDatabaseFree) then |
| 1299 |
< |
FDatabaseFree(Sender); |
| 1300 |
< |
end; |
| 1301 |
< |
|
| 1302 |
< |
procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject); |
| 1303 |
< |
begin |
| 1304 |
< |
if Active then |
| 1305 |
< |
Active := False; |
| 1306 |
< |
if FQSelect <> nil then |
| 1307 |
< |
FQSelect.FreeHandle; |
| 1308 |
< |
if FQDelete <> nil then |
| 1309 |
< |
FQDelete.FreeHandle; |
| 1310 |
< |
if FQInsert <> nil then |
| 1311 |
< |
FQInsert.FreeHandle; |
| 1312 |
< |
if FQModify <> nil then |
| 1313 |
< |
FQModify.FreeHandle; |
| 1314 |
< |
if FQRefresh <> nil then |
| 1315 |
< |
FQRefresh.FreeHandle; |
| 1316 |
< |
if Assigned(FBeforeTransactionEnd) then |
| 1317 |
< |
FBeforeTransactionEnd(Sender); |
| 1318 |
< |
end; |
| 1319 |
< |
|
| 1320 |
< |
procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject); |
| 1321 |
< |
begin |
| 1322 |
< |
if Assigned(FAfterTransactionEnd) then |
| 1323 |
< |
FAfterTransactionEnd(Sender); |
| 1324 |
< |
end; |
| 1325 |
< |
|
| 1326 |
< |
procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject); |
| 1327 |
< |
begin |
| 1328 |
< |
if Assigned(FTransactionFree) then |
| 1329 |
< |
FTransactionFree(Sender); |
| 1330 |
< |
end; |
| 1331 |
< |
|
| 1332 |
< |
{ Read the record from FQSelect.Current into the record buffer |
| 1333 |
< |
Then write the buffer to in memory cache } |
| 1334 |
< |
procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL; |
| 1335 |
< |
RecordNumber: Integer; Buffer: PChar); |
| 1336 |
< |
var |
| 1337 |
< |
p: PRecordData; |
| 1338 |
< |
pbd: PBlobDataArray; |
| 1339 |
< |
i, j: Integer; |
| 1340 |
< |
LocalData: Pointer; |
| 1341 |
< |
LocalDate, LocalDouble: Double; |
| 1342 |
< |
LocalInt: Integer; |
| 1343 |
< |
LocalInt64: Int64; |
| 1344 |
< |
LocalCurrency: Currency; |
| 1345 |
< |
FieldsLoaded: Integer; |
| 1346 |
< |
temp: TIBXSQLVAR; |
| 1347 |
< |
begin |
| 1348 |
< |
p := PRecordData(Buffer); |
| 1349 |
< |
{ Make sure blob cache is empty } |
| 1350 |
< |
pbd := PBlobDataArray(Buffer + FBlobCacheOffset); |
| 1351 |
< |
if RecordNumber > -1 then |
| 1352 |
< |
for i := 0 to BlobFieldCount - 1 do |
| 1353 |
< |
pbd^[i] := nil; |
| 1354 |
< |
{ Get record information } |
| 1355 |
< |
p^.rdBookmarkFlag := bfCurrent; |
| 1356 |
< |
p^.rdFieldCount := Qry.Current.Count; |
| 1357 |
< |
p^.rdRecordNumber := RecordNumber; |
| 1358 |
< |
p^.rdUpdateStatus := usUnmodified; |
| 1359 |
< |
p^.rdCachedUpdateStatus := cusUnmodified; |
| 1360 |
< |
p^.rdSavedOffset := $FFFFFFFF; |
| 1361 |
< |
|
| 1362 |
< |
{ Load up the fields } |
| 1363 |
< |
FieldsLoaded := FQSelect.Current.Count; |
| 1364 |
< |
j := 1; |
| 1365 |
< |
for i := 0 to Qry.Current.Count - 1 do |
| 1366 |
< |
begin |
| 1367 |
< |
if (Qry = FQSelect) then |
| 1368 |
< |
j := i + 1 |
| 1369 |
< |
else begin |
| 1370 |
< |
if FieldsLoaded = 0 then |
| 1371 |
< |
break; |
| 1372 |
< |
j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1; |
| 1373 |
< |
if j < 1 then |
| 1374 |
< |
continue |
| 1375 |
< |
else |
| 1376 |
< |
Dec(FieldsLoaded); |
| 1377 |
< |
end; |
| 1378 |
< |
with FQSelect.Current[j - 1].Data^ do |
| 1379 |
< |
if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize} |
| 1380 |
< |
begin |
| 1381 |
< |
if sqllen <= 8 then |
| 1382 |
< |
p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^; |
| 1383 |
< |
continue; |
| 1384 |
< |
end; |
| 1385 |
< |
if j > 0 then with p^ do |
| 1386 |
< |
begin |
| 1387 |
< |
rdFields[j].fdDataType := |
| 1388 |
< |
Qry.Current[i].Data^.sqltype and (not 1); |
| 1389 |
< |
rdFields[j].fdDataScale := |
| 1390 |
< |
Qry.Current[i].Data^.sqlscale; |
| 1391 |
< |
rdFields[j].fdNullable := |
| 1392 |
< |
(Qry.Current[i].Data^.sqltype and 1 = 1); |
| 1393 |
< |
rdFields[j].fdIsNull := |
| 1394 |
< |
(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1)); |
| 1395 |
< |
LocalData := Qry.Current[i].Data^.sqldata; |
| 1396 |
< |
case rdFields[j].fdDataType of |
| 1397 |
< |
SQL_TIMESTAMP: |
| 1398 |
< |
begin |
| 1399 |
< |
rdFields[j].fdDataSize := SizeOf(TDateTime); |
| 1400 |
< |
if RecordNumber >= 0 then |
| 1401 |
< |
LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime)); |
| 1402 |
< |
LocalData := PChar(@LocalDate); |
| 1403 |
< |
end; |
| 1404 |
< |
SQL_TYPE_DATE: |
| 1405 |
< |
begin |
| 1406 |
< |
rdFields[j].fdDataSize := SizeOf(TDateTime); |
| 1407 |
< |
if RecordNumber >= 0 then |
| 1408 |
< |
LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date; |
| 1409 |
< |
LocalData := PChar(@LocalInt); |
| 1410 |
< |
end; |
| 1411 |
< |
SQL_TYPE_TIME: |
| 1412 |
< |
begin |
| 1413 |
< |
rdFields[j].fdDataSize := SizeOf(TDateTime); |
| 1414 |
< |
if RecordNumber >= 0 then |
| 1415 |
< |
LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time; |
| 1416 |
< |
LocalData := PChar(@LocalInt); |
| 1417 |
< |
end; |
| 1418 |
< |
SQL_SHORT, SQL_LONG: |
| 1419 |
< |
begin |
| 1420 |
< |
if (rdFields[j].fdDataScale = 0) then |
| 1421 |
< |
begin |
| 1422 |
< |
rdFields[j].fdDataSize := SizeOf(Integer); |
| 1423 |
< |
if RecordNumber >= 0 then |
| 1424 |
< |
LocalInt := Qry.Current[i].AsLong; |
| 1425 |
< |
LocalData := PChar(@LocalInt); |
| 1426 |
< |
end |
| 1427 |
< |
else if (rdFields[j].fdDataScale >= (-4)) then |
| 1428 |
< |
begin |
| 1429 |
< |
rdFields[j].fdDataSize := SizeOf(Currency); |
| 1430 |
< |
if RecordNumber >= 0 then |
| 1431 |
< |
LocalCurrency := Qry.Current[i].AsCurrency; |
| 1432 |
< |
LocalData := PChar(@LocalCurrency); |
| 1433 |
< |
end |
| 1434 |
< |
else begin |
| 1435 |
< |
rdFields[j].fdDataSize := SizeOf(Double); |
| 1436 |
< |
if RecordNumber >= 0 then |
| 1437 |
< |
LocalDouble := Qry.Current[i].AsDouble; |
| 1438 |
< |
LocalData := PChar(@LocalDouble); |
| 1439 |
< |
end; |
| 1440 |
< |
end; |
| 1441 |
< |
SQL_INT64: |
| 1442 |
< |
begin |
| 1443 |
< |
if (rdFields[j].fdDataScale = 0) then |
| 1444 |
< |
begin |
| 1445 |
< |
rdFields[j].fdDataSize := SizeOf(Int64); |
| 1446 |
< |
if RecordNumber >= 0 then |
| 1447 |
< |
LocalInt64 := Qry.Current[i].AsInt64; |
| 1448 |
< |
LocalData := PChar(@LocalInt64); |
| 1449 |
< |
end |
| 1450 |
< |
else if (rdFields[j].fdDataScale >= (-4)) then |
| 1451 |
< |
begin |
| 1452 |
< |
rdFields[j].fdDataSize := SizeOf(Currency); |
| 1453 |
< |
if RecordNumber >= 0 then |
| 1454 |
< |
LocalCurrency := Qry.Current[i].AsCurrency; |
| 1455 |
< |
LocalData := PChar(@LocalCurrency); |
| 1456 |
< |
end |
| 1457 |
< |
else begin |
| 1458 |
< |
rdFields[j].fdDataSize := SizeOf(Double); |
| 1459 |
< |
if RecordNumber >= 0 then |
| 1460 |
< |
LocalDouble := Qry.Current[i].AsDouble; |
| 1461 |
< |
LocalData := PChar(@LocalDouble); |
| 1462 |
< |
end |
| 1463 |
< |
end; |
| 1464 |
< |
SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: |
| 1465 |
< |
begin |
| 1466 |
< |
rdFields[j].fdDataSize := SizeOf(Double); |
| 1467 |
< |
if RecordNumber >= 0 then |
| 1468 |
< |
LocalDouble := Qry.Current[i].AsDouble; |
| 1469 |
< |
LocalData := PChar(@LocalDouble); |
| 1470 |
< |
end; |
| 1471 |
< |
SQL_VARYING: |
| 1472 |
< |
begin |
| 1473 |
< |
rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen; |
| 1474 |
< |
rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2); |
| 1475 |
< |
if RecordNumber >= 0 then |
| 1476 |
< |
begin |
| 1477 |
< |
if (rdFields[j].fdDataLength = 0) then |
| 1478 |
< |
LocalData := nil |
| 1479 |
< |
else |
| 1480 |
< |
begin |
| 1481 |
< |
temp := Qry.Current[i]; |
| 1482 |
< |
LocalData := @temp.Data^.sqldata[2]; |
| 1483 |
< |
(* LocalData := @Qry.Current[i].Data^.sqldata[2];*) |
| 1484 |
< |
end; |
| 1485 |
< |
end; |
| 1486 |
< |
end; |
| 1487 |
< |
else { SQL_TEXT, SQL_BLOB, SQL_ARRAY, SQL_QUAD } |
| 1488 |
< |
begin |
| 1489 |
< |
rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen; |
| 1490 |
< |
if (rdFields[j].fdDataType = SQL_TEXT) then |
| 1491 |
< |
rdFields[j].fdDataLength := rdFields[j].fdDataSize; |
| 1492 |
< |
end; |
| 1493 |
< |
end; |
| 1494 |
< |
if RecordNumber < 0 then |
| 1495 |
< |
begin |
| 1496 |
< |
rdFields[j].fdIsNull := True; |
| 1497 |
< |
rdFields[j].fdDataOfs := FRecordSize; |
| 1498 |
< |
Inc(FRecordSize, rdFields[j].fdDataSize); |
| 1499 |
< |
end |
| 1500 |
< |
else begin |
| 1501 |
< |
if rdFields[j].fdDataType = SQL_VARYING then |
| 1502 |
< |
begin |
| 1503 |
< |
if LocalData <> nil then |
| 1504 |
< |
Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength) |
| 1505 |
< |
end |
| 1506 |
< |
else |
| 1507 |
< |
Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize) |
| 1508 |
< |
end; |
| 1509 |
< |
end; |
| 1510 |
< |
end; |
| 1511 |
< |
WriteRecordCache(RecordNumber, PChar(p)); |
| 1512 |
< |
end; |
| 1513 |
< |
|
| 1514 |
< |
function TIBCustomDataSet.GetActiveBuf: PChar; |
| 1515 |
< |
begin |
| 1516 |
< |
case State of |
| 1517 |
< |
dsBrowse: |
| 1518 |
< |
if IsEmpty then |
| 1519 |
< |
result := nil |
| 1520 |
< |
else |
| 1521 |
< |
result := ActiveBuffer; |
| 1522 |
< |
dsEdit, dsInsert: |
| 1523 |
< |
result := ActiveBuffer; |
| 1524 |
< |
dsCalcFields: |
| 1525 |
< |
result := CalcBuffer; |
| 1526 |
< |
dsFilter: |
| 1527 |
< |
result := FFilterBuffer; |
| 1528 |
< |
dsNewValue: |
| 1529 |
< |
result := ActiveBuffer; |
| 1530 |
< |
dsOldValue: |
| 1531 |
< |
if (PRecordData(ActiveBuffer)^.rdRecordNumber = |
| 1532 |
< |
PRecordData(FOldBuffer)^.rdRecordNumber) then |
| 1533 |
< |
result := FOldBuffer |
| 1534 |
< |
else |
| 1535 |
< |
result := ActiveBuffer; |
| 1536 |
< |
else if not FOpen then |
| 1537 |
< |
result := nil |
| 1538 |
< |
else |
| 1539 |
< |
result := ActiveBuffer; |
| 1540 |
< |
end; |
| 1541 |
< |
end; |
| 1542 |
< |
|
| 1543 |
< |
function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus; |
| 1544 |
< |
begin |
| 1545 |
< |
if Active then |
| 1546 |
< |
result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus |
| 1547 |
< |
else |
| 1548 |
< |
result := cusUnmodified; |
| 1549 |
< |
end; |
| 1550 |
< |
|
| 1551 |
< |
function TIBCustomDataSet.GetDatabase: TIBDatabase; |
| 1552 |
< |
begin |
| 1553 |
< |
result := FBase.Database; |
| 1554 |
< |
end; |
| 1555 |
< |
|
| 1556 |
< |
function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE; |
| 1557 |
< |
begin |
| 1558 |
< |
result := FBase.DBHandle; |
| 1559 |
< |
end; |
| 1560 |
< |
|
| 1561 |
< |
function TIBCustomDataSet.GetDeleteSQL: TStrings; |
| 1562 |
< |
begin |
| 1563 |
< |
result := FQDelete.SQL; |
| 1564 |
< |
end; |
| 1565 |
< |
|
| 1566 |
< |
function TIBCustomDataSet.GetInsertSQL: TStrings; |
| 1567 |
< |
begin |
| 1568 |
< |
result := FQInsert.SQL; |
| 1569 |
< |
end; |
| 1570 |
< |
|
| 1571 |
< |
function TIBCustomDataSet.GetSQLParams: TIBXSQLDA; |
| 1572 |
< |
begin |
| 1573 |
< |
if not FInternalPrepared then |
| 1574 |
< |
InternalPrepare; |
| 1575 |
< |
result := FQSelect.Params; |
| 1576 |
< |
end; |
| 1577 |
< |
|
| 1578 |
< |
function TIBCustomDataSet.GetRefreshSQL: TStrings; |
| 1579 |
< |
begin |
| 1580 |
< |
result := FQRefresh.SQL; |
| 1581 |
< |
end; |
| 1582 |
< |
|
| 1583 |
< |
function TIBCustomDataSet.GetSelectSQL: TStrings; |
| 1584 |
< |
begin |
| 1585 |
< |
result := FQSelect.SQL; |
| 1586 |
< |
end; |
| 1587 |
< |
|
| 1588 |
< |
function TIBCustomDataSet.GetStatementType: TIBSQLTypes; |
| 1589 |
< |
begin |
| 1590 |
< |
result := FQSelect.SQLType; |
| 1591 |
< |
end; |
| 1592 |
< |
|
| 1593 |
< |
function TIBCustomDataSet.GetModifySQL: TStrings; |
| 1594 |
< |
begin |
| 1595 |
< |
result := FQModify.SQL; |
| 1596 |
< |
end; |
| 1597 |
< |
|
| 1598 |
< |
function TIBCustomDataSet.GetTransaction: TIBTransaction; |
| 1599 |
< |
begin |
| 1600 |
< |
result := FBase.Transaction; |
| 1601 |
< |
end; |
| 1602 |
< |
|
| 1603 |
< |
function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE; |
| 1604 |
< |
begin |
| 1605 |
< |
result := FBase.TRHandle; |
| 1606 |
< |
end; |
| 1607 |
< |
|
| 1608 |
< |
procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); |
| 1609 |
< |
begin |
| 1610 |
< |
if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then |
| 1611 |
< |
FUpdateObject.Apply(ukDelete,Buff) |
| 1612 |
< |
else |
| 1613 |
< |
begin |
| 1614 |
< |
SetInternalSQLParams(FQDelete, Buff); |
| 1615 |
< |
FQDelete.ExecQuery; |
| 1616 |
< |
end; |
| 1617 |
< |
with PRecordData(Buff)^ do |
| 1618 |
< |
begin |
| 1619 |
< |
rdUpdateStatus := usDeleted; |
| 1620 |
< |
rdCachedUpdateStatus := cusUnmodified; |
| 1621 |
< |
end; |
| 1622 |
< |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 1623 |
< |
end; |
| 1624 |
< |
|
| 1625 |
< |
function TIBCustomDataSet.InternalLocate(const KeyFields: string; |
| 1626 |
< |
const KeyValues: Variant; Options: TLocateOptions): Boolean; |
| 1627 |
< |
var |
| 1628 |
< |
keyFieldList: TList; |
| 1629 |
< |
{$IF FPC_FULLVERSION > 20600 } |
| 1630 |
< |
CurBookmark: TBookmark; |
| 1631 |
< |
{$ELSE} |
| 1632 |
< |
CurBookmark: string; |
| 1633 |
< |
{$ENDIF} |
| 1634 |
< |
fieldValue: Variant; |
| 1635 |
< |
lookupValues: array of variant; |
| 1636 |
< |
i, fieldCount: Integer; |
| 1637 |
< |
fieldValueAsString: string; |
| 1638 |
< |
lookupValueAsString: string; |
| 1639 |
< |
begin |
| 1640 |
< |
keyFieldList := TList.Create; |
| 1641 |
< |
try |
| 1642 |
< |
GetFieldList(keyFieldList, KeyFields); |
| 1643 |
< |
fieldCount := keyFieldList.Count; |
| 1644 |
< |
CurBookmark := Bookmark; |
| 1645 |
< |
result := false; |
| 1646 |
< |
SetLength(lookupValues, fieldCount); |
| 1647 |
< |
if not EOF then |
| 1648 |
< |
begin |
| 1649 |
< |
for i := 0 to fieldCount - 1 do {expand key values into lookupValues array} |
| 1650 |
< |
begin |
| 1651 |
< |
if VarIsArray(KeyValues) then |
| 1652 |
< |
lookupValues[i] := KeyValues[i] |
| 1653 |
< |
else |
| 1654 |
< |
if i > 0 then |
| 1655 |
< |
lookupValues[i] := NULL |
| 1656 |
< |
else |
| 1657 |
< |
lookupValues[0] := KeyValues; |
| 1658 |
< |
|
| 1659 |
< |
{convert to upper case is case insensitive search} |
| 1660 |
< |
if (TField(keyFieldList[i]).DataType = ftString) and |
| 1661 |
< |
not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then |
| 1662 |
< |
lookupValues[i] := UpperCase(lookupValues[i]); |
| 1663 |
< |
end; |
| 1664 |
< |
end; |
| 1665 |
< |
while not result and not EOF do {search for a matching record} |
| 1666 |
< |
begin |
| 1667 |
< |
i := 0; |
| 1668 |
< |
result := true; |
| 1669 |
< |
while result and (i < fieldCount) do |
| 1670 |
< |
{see if all of the key fields matches} |
| 1671 |
< |
begin |
| 1672 |
< |
fieldValue := TField(keyFieldList[i]).Value; |
| 1673 |
< |
result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i])); |
| 1674 |
< |
if result and not VarIsNull(fieldValue) then |
| 1675 |
< |
begin |
| 1676 |
< |
try |
| 1677 |
< |
if TField(keyFieldList[i]).DataType = ftString then |
| 1678 |
< |
begin |
| 1679 |
< |
{strings need special handling because of the locate options that |
| 1680 |
< |
apply to them} |
| 1681 |
< |
fieldValueAsString := TField(keyFieldList[i]).AsString; |
| 1682 |
< |
lookupValueAsString := lookupValues[i]; |
| 1683 |
< |
if (loCaseInsensitive in Options) then |
| 1684 |
< |
fieldValueAsString := UpperCase(fieldValueAsString); |
| 1685 |
< |
|
| 1686 |
< |
if (loPartialKey in Options) then |
| 1687 |
< |
result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1) |
| 1688 |
< |
else |
| 1689 |
< |
result := result and (fieldValueAsString = lookupValueAsString); |
| 1690 |
< |
end |
| 1691 |
< |
else |
| 1692 |
< |
result := result and (lookupValues[i] = |
| 1693 |
< |
VarAsType(fieldValue, VarType(lookupValues[i]))); |
| 1694 |
< |
except on EVariantError do |
| 1695 |
< |
result := False; |
| 1696 |
< |
end; |
| 1697 |
< |
end; |
| 1698 |
< |
Inc(i); |
| 1699 |
< |
end; |
| 1700 |
< |
if not result then |
| 1701 |
< |
Next; |
| 1702 |
< |
end; |
| 1703 |
< |
if not result then |
| 1704 |
< |
Bookmark := CurBookmark |
| 1705 |
< |
else |
| 1706 |
< |
CursorPosChanged; |
| 1707 |
< |
finally |
| 1708 |
< |
keyFieldList.Free; |
| 1709 |
< |
SetLength(lookupValues,0) |
| 1710 |
< |
end; |
| 1711 |
< |
end; |
| 1712 |
< |
|
| 1713 |
< |
procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer); |
| 1714 |
< |
var |
| 1715 |
< |
i, j, k: Integer; |
| 1716 |
< |
pbd: PBlobDataArray; |
| 1717 |
< |
begin |
| 1718 |
< |
pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset); |
| 1719 |
< |
j := 0; |
| 1720 |
< |
for i := 0 to FieldCount - 1 do |
| 1721 |
< |
if Fields[i].IsBlob then |
| 1722 |
< |
begin |
| 1723 |
< |
k := FMappedFieldPosition[Fields[i].FieldNo -1]; |
| 1724 |
< |
if pbd^[j] <> nil then |
| 1725 |
< |
begin |
| 1726 |
< |
pbd^[j].Finalize; |
| 1727 |
< |
PISC_QUAD( |
| 1728 |
< |
PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ := |
| 1729 |
< |
pbd^[j].BlobID; |
| 1730 |
< |
PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0; |
| 1731 |
< |
end; |
| 1732 |
< |
Inc(j); |
| 1733 |
< |
end; |
| 1734 |
< |
if Assigned(FUpdateObject) then |
| 1735 |
< |
begin |
| 1736 |
< |
if (Qry = FQDelete) then |
| 1737 |
< |
FUpdateObject.Apply(ukDelete,Buff) |
| 1738 |
< |
else if (Qry = FQInsert) then |
| 1739 |
< |
FUpdateObject.Apply(ukInsert,Buff) |
| 1740 |
< |
else |
| 1741 |
< |
FUpdateObject.Apply(ukModify,Buff); |
| 1742 |
< |
end |
| 1743 |
< |
else begin |
| 1744 |
< |
SetInternalSQLParams(Qry, Buff); |
| 1745 |
< |
Qry.ExecQuery; |
| 1746 |
< |
end; |
| 1747 |
< |
PRecordData(Buff)^.rdUpdateStatus := usUnmodified; |
| 1748 |
< |
PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified; |
| 1749 |
< |
SetModified(False); |
| 1750 |
< |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 1751 |
< |
if (FForcedRefresh or FNeedsRefresh) and CanRefresh then |
| 1752 |
< |
InternalRefreshRow; |
| 1753 |
< |
end; |
| 1754 |
< |
|
| 1755 |
< |
procedure TIBCustomDataSet.InternalRefreshRow; |
| 1756 |
< |
var |
| 1757 |
< |
Buff: PChar; |
| 1758 |
< |
SetCursor: Boolean; |
| 1759 |
< |
ofs: DWORD; |
| 1760 |
< |
Qry: TIBSQL; |
| 1761 |
< |
begin |
| 1762 |
< |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 1763 |
< |
if SetCursor then |
| 1764 |
< |
Screen.Cursor := crHourGlass; |
| 1765 |
< |
try |
| 1766 |
< |
Buff := GetActiveBuf; |
| 1767 |
< |
if CanRefresh then |
| 1768 |
< |
begin |
| 1769 |
< |
if Buff <> nil then |
| 1770 |
< |
begin |
| 1771 |
< |
if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then |
| 1772 |
< |
begin |
| 1773 |
< |
Qry := TIBSQL.Create(self); |
| 1774 |
< |
Qry.Database := Database; |
| 1775 |
< |
Qry.Transaction := Transaction; |
| 1776 |
< |
Qry.GoToFirstRecordOnExecute := False; |
| 1777 |
< |
Qry.SQL.Text := FUpdateObject.RefreshSQL.Text; |
| 1778 |
< |
end |
| 1779 |
< |
else |
| 1780 |
< |
Qry := FQRefresh; |
| 1781 |
< |
SetInternalSQLParams(Qry, Buff); |
| 1782 |
< |
Qry.ExecQuery; |
| 1783 |
< |
try |
| 1784 |
< |
if (Qry.SQLType = SQLExecProcedure) or |
| 1785 |
< |
(Qry.Next <> nil) then |
| 1786 |
< |
begin |
| 1787 |
< |
ofs := PRecordData(Buff)^.rdSavedOffset; |
| 1788 |
< |
FetchCurrentRecordToBuffer(Qry, |
| 1789 |
< |
PRecordData(Buff)^.rdRecordNumber, |
| 1790 |
< |
Buff); |
| 1791 |
< |
if FCachedUpdates and (ofs <> $FFFFFFFF) then |
| 1792 |
< |
begin |
| 1793 |
< |
PRecordData(Buff)^.rdSavedOffset := ofs; |
| 1794 |
< |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 1795 |
< |
SaveOldBuffer(Buff); |
| 1796 |
< |
end; |
| 1797 |
< |
end; |
| 1798 |
< |
finally |
| 1799 |
< |
Qry.Close; |
| 1800 |
< |
end; |
| 1801 |
< |
if Qry <> FQRefresh then |
| 1802 |
< |
Qry.Free; |
| 1803 |
< |
end |
| 1804 |
< |
end |
| 1805 |
< |
else |
| 1806 |
< |
IBError(ibxeCannotRefresh, [nil]); |
| 1807 |
< |
finally |
| 1808 |
< |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 1809 |
< |
Screen.Cursor := crDefault; |
| 1810 |
< |
end; |
| 1811 |
< |
end; |
| 1812 |
< |
|
| 1813 |
< |
procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer); |
| 1814 |
< |
var |
| 1815 |
< |
NewBuffer, OldBuffer: PRecordData; |
| 1816 |
< |
|
| 1817 |
< |
begin |
| 1818 |
< |
NewBuffer := nil; |
| 1819 |
< |
OldBuffer := nil; |
| 1820 |
< |
NewBuffer := PRecordData(AllocRecordBuffer); |
| 1821 |
< |
OldBuffer := PRecordData(AllocRecordBuffer); |
| 1822 |
< |
try |
| 1823 |
< |
ReadRecordCache(RecordNumber, PChar(NewBuffer), False); |
| 1824 |
< |
ReadRecordCache(RecordNumber, PChar(OldBuffer), True); |
| 1825 |
< |
case NewBuffer^.rdCachedUpdateStatus of |
| 1826 |
< |
cusInserted: |
| 1827 |
< |
begin |
| 1828 |
< |
NewBuffer^.rdCachedUpdateStatus := cusUninserted; |
| 1829 |
< |
Inc(FDeletedRecords); |
| 1830 |
< |
end; |
| 1831 |
< |
cusModified, |
| 1832 |
< |
cusDeleted: |
| 1833 |
< |
begin |
| 1834 |
< |
if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then |
| 1835 |
< |
Dec(FDeletedRecords); |
| 1836 |
< |
CopyRecordBuffer(OldBuffer, NewBuffer); |
| 1837 |
< |
end; |
| 1838 |
< |
end; |
| 1839 |
< |
|
| 1840 |
< |
if State in dsEditModes then |
| 1841 |
< |
Cancel; |
| 1842 |
< |
|
| 1843 |
< |
WriteRecordCache(RecordNumber, PChar(NewBuffer)); |
| 1844 |
< |
|
| 1845 |
< |
if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then |
| 1846 |
< |
ReSync([]); |
| 1847 |
< |
finally |
| 1848 |
< |
FreeRecordBuffer(PChar(NewBuffer)); |
| 1849 |
< |
FreeRecordBuffer(PChar(OldBuffer)); |
| 1850 |
< |
end; |
| 1851 |
< |
end; |
| 1852 |
< |
|
| 1853 |
< |
{ A visible record is one that is not truly deleted, |
| 1854 |
< |
and it is also listed in the FUpdateRecordTypes set } |
| 1855 |
< |
|
| 1856 |
< |
function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean; |
| 1857 |
< |
begin |
| 1858 |
< |
result := True; |
| 1859 |
< |
if not (State = dsOldValue) then |
| 1860 |
< |
result := |
| 1861 |
< |
(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and |
| 1862 |
< |
(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and |
| 1863 |
< |
(PRecordData(Buffer)^.rdUpdateStatus = usDeleted))); |
| 1864 |
< |
end; |
| 1865 |
< |
|
| 1866 |
< |
|
| 1867 |
< |
function TIBCustomDataSet.LocateNext(const KeyFields: string; |
| 1868 |
< |
const KeyValues: Variant; Options: TLocateOptions): Boolean; |
| 1869 |
< |
begin |
| 1870 |
< |
DisableControls; |
| 1871 |
< |
try |
| 1872 |
< |
result := InternalLocate(KeyFields, KeyValues, Options); |
| 1873 |
< |
finally |
| 1874 |
< |
EnableControls; |
| 1875 |
< |
end; |
| 1876 |
< |
end; |
| 1877 |
< |
|
| 1878 |
< |
procedure TIBCustomDataSet.InternalPrepare; |
| 1879 |
< |
var |
| 1880 |
< |
SetCursor: Boolean; |
| 1881 |
< |
DidActivate: Boolean; |
| 1882 |
< |
begin |
| 1883 |
< |
if FInternalPrepared then |
| 1884 |
< |
Exit; |
| 1885 |
< |
DidActivate := False; |
| 1886 |
< |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 1887 |
< |
if SetCursor then |
| 1888 |
< |
Screen.Cursor := crHourGlass; |
| 1889 |
< |
try |
| 1890 |
< |
ActivateConnection; |
| 1891 |
< |
DidActivate := ActivateTransaction; |
| 1892 |
< |
FBase.CheckDatabase; |
| 1893 |
< |
FBase.CheckTransaction; |
| 1894 |
< |
if FQSelect.SQL.Text <> '' then |
| 1895 |
< |
begin |
| 1896 |
< |
if not FQSelect.Prepared then |
| 1897 |
< |
begin |
| 1898 |
< |
FQSelect.ParamCheck := ParamCheck; |
| 1899 |
< |
FQSelect.Prepare; |
| 1900 |
< |
end; |
| 1901 |
< |
if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then |
| 1902 |
< |
FQDelete.Prepare; |
| 1903 |
< |
if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then |
| 1904 |
< |
FQInsert.Prepare; |
| 1905 |
< |
if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then |
| 1906 |
< |
FQRefresh.Prepare; |
| 1907 |
< |
if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then |
| 1908 |
< |
FQModify.Prepare; |
| 1909 |
< |
FInternalPrepared := True; |
| 1910 |
< |
InternalInitFieldDefs; |
| 1911 |
< |
end else |
| 1912 |
< |
IBError(ibxeEmptyQuery, [nil]); |
| 1913 |
< |
finally |
| 1914 |
< |
if DidActivate then |
| 1915 |
< |
DeactivateTransaction; |
| 1916 |
< |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 1917 |
< |
Screen.Cursor := crDefault; |
| 1918 |
< |
end; |
| 1919 |
< |
end; |
| 1920 |
< |
|
| 1921 |
< |
procedure TIBCustomDataSet.RecordModified(Value: Boolean); |
| 1922 |
< |
begin |
| 1923 |
< |
SetModified(Value); |
| 1924 |
< |
end; |
| 1925 |
< |
|
| 1926 |
< |
procedure TIBCustomDataSet.RevertRecord; |
| 1927 |
< |
var |
| 1928 |
< |
Buff: PRecordData; |
| 1929 |
< |
begin |
| 1930 |
< |
if FCachedUpdates and FUpdatesPending then |
| 1931 |
< |
begin |
| 1932 |
< |
Buff := PRecordData(GetActiveBuf); |
| 1933 |
< |
InternalRevertRecord(Buff^.rdRecordNumber); |
| 1934 |
< |
ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False); |
| 1935 |
< |
DataEvent(deRecordChange, 0); |
| 1936 |
< |
end; |
| 1937 |
< |
end; |
| 1938 |
< |
|
| 1939 |
< |
procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar); |
| 1940 |
< |
var |
| 1941 |
< |
OldBuffer: Pointer; |
| 1942 |
< |
procedure CopyOldBuffer; |
| 1943 |
< |
begin |
| 1944 |
< |
CopyRecordBuffer(Buffer, OldBuffer); |
| 1945 |
< |
if BlobFieldCount > 0 then |
| 1946 |
< |
FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream), |
| 1947 |
< |
0); |
| 1948 |
< |
end; |
| 1949 |
< |
|
| 1950 |
< |
begin |
| 1951 |
< |
if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then |
| 1952 |
< |
begin |
| 1953 |
< |
OldBuffer := AllocRecordBuffer; |
| 1954 |
< |
try |
| 1955 |
< |
if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then |
| 1956 |
< |
begin |
| 1957 |
< |
PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0, |
| 1958 |
< |
FILE_END); |
| 1959 |
< |
CopyOldBuffer; |
| 1960 |
< |
WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer); |
| 1961 |
< |
WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize, |
| 1962 |
< |
FILE_BEGIN, Buffer); |
| 1963 |
< |
end |
| 1964 |
< |
else begin |
| 1965 |
< |
CopyOldBuffer; |
| 1966 |
< |
WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN, |
| 1967 |
< |
OldBuffer); |
| 1968 |
< |
end; |
| 1969 |
< |
finally |
| 1970 |
< |
FreeRecordBuffer(PChar(OldBuffer)); |
| 1971 |
< |
end; |
| 1972 |
< |
end; |
| 1973 |
< |
end; |
| 1974 |
< |
|
| 1975 |
< |
procedure TIBCustomDataSet.SetBufferChunks(Value: Integer); |
| 1976 |
< |
begin |
| 1977 |
< |
if (Value <= 0) then |
| 1978 |
< |
FBufferChunks := BufferCacheSize |
| 1979 |
< |
else |
| 1980 |
< |
FBufferChunks := Value; |
| 1981 |
< |
end; |
| 1982 |
< |
|
| 1983 |
< |
procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase); |
| 1984 |
< |
begin |
| 1985 |
< |
if (FBase.Database <> Value) then |
| 1986 |
< |
begin |
| 1987 |
< |
CheckDatasetClosed; |
| 1988 |
< |
FBase.Database := Value; |
| 1989 |
< |
FQDelete.Database := Value; |
| 1990 |
< |
FQInsert.Database := Value; |
| 1991 |
< |
FQRefresh.Database := Value; |
| 1992 |
< |
FQSelect.Database := Value; |
| 1993 |
< |
FQModify.Database := Value; |
| 1994 |
< |
end; |
| 1995 |
< |
end; |
| 1996 |
< |
|
| 1997 |
< |
procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings); |
| 1998 |
< |
begin |
| 1999 |
< |
if FQDelete.SQL.Text <> Value.Text then |
| 2000 |
< |
begin |
| 2001 |
< |
Disconnect; |
| 2002 |
< |
FQDelete.SQL.Assign(Value); |
| 2003 |
< |
end; |
| 2004 |
< |
end; |
| 2005 |
< |
|
| 2006 |
< |
procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings); |
| 2007 |
< |
begin |
| 2008 |
< |
if FQInsert.SQL.Text <> Value.Text then |
| 2009 |
< |
begin |
| 2010 |
< |
Disconnect; |
| 2011 |
< |
FQInsert.SQL.Assign(Value); |
| 2012 |
< |
end; |
| 2013 |
< |
end; |
| 2014 |
< |
|
| 2015 |
< |
procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer); |
| 2016 |
< |
var |
| 2017 |
< |
i, j: Integer; |
| 2018 |
< |
cr, data: PChar; |
| 2019 |
< |
fn, st: string; |
| 2020 |
< |
OldBuffer: Pointer; |
| 2021 |
< |
ts: TTimeStamp; |
| 2022 |
< |
begin |
| 2023 |
< |
if (Buffer = nil) then |
| 2024 |
< |
IBError(ibxeBufferNotSet, [nil]); |
| 2025 |
< |
if (not FInternalPrepared) then |
| 2026 |
< |
InternalPrepare; |
| 2027 |
< |
OldBuffer := nil; |
| 2028 |
< |
try |
| 2029 |
< |
for i := 0 to Qry.Params.Count - 1 do |
| 2030 |
< |
begin |
| 2031 |
< |
fn := Qry.Params[i].Name; |
| 2032 |
< |
if (Pos('OLD_', fn) = 1) then {mbcs ok} |
| 2033 |
< |
begin |
| 2034 |
< |
fn := Copy(fn, 5, Length(fn)); |
| 2035 |
< |
if not Assigned(OldBuffer) then |
| 2036 |
< |
begin |
| 2037 |
< |
OldBuffer := AllocRecordBuffer; |
| 2038 |
< |
ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True); |
| 2039 |
< |
end; |
| 2040 |
< |
cr := OldBuffer; |
| 2041 |
< |
end |
| 2042 |
< |
else if (Pos('NEW_', fn) = 1) then {mbcs ok} |
| 2043 |
< |
begin |
| 2044 |
< |
fn := Copy(fn, 5, Length(fn)); |
| 2045 |
< |
cr := Buffer; |
| 2046 |
< |
end |
| 2047 |
< |
else |
| 2048 |
< |
cr := Buffer; |
| 2049 |
< |
j := FQSelect.FieldIndex[fn] + 1; |
| 2050 |
< |
if (j > 0) then |
| 2051 |
< |
with PRecordData(cr)^ do |
| 2052 |
< |
begin |
| 2053 |
< |
if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize} |
| 2054 |
< |
begin |
| 2055 |
< |
PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey; |
| 2056 |
< |
continue; |
| 2057 |
< |
end; |
| 2058 |
< |
if rdFields[j].fdIsNull then |
| 2059 |
< |
Qry.Params[i].IsNull := True |
| 2060 |
< |
else begin |
| 2061 |
< |
Qry.Params[i].IsNull := False; |
| 2062 |
< |
data := cr + rdFields[j].fdDataOfs; |
| 2063 |
< |
case rdFields[j].fdDataType of |
| 2064 |
< |
SQL_TEXT, SQL_VARYING: |
| 2065 |
< |
begin |
| 2066 |
< |
SetString(st, data, rdFields[j].fdDataLength); |
| 2067 |
< |
Qry.Params[i].AsString := st; |
| 2068 |
< |
end; |
| 2069 |
< |
SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT: |
| 2070 |
< |
Qry.Params[i].AsDouble := PDouble(data)^; |
| 2071 |
< |
SQL_SHORT, SQL_LONG: |
| 2072 |
< |
begin |
| 2073 |
< |
if rdFields[j].fdDataScale = 0 then |
| 2074 |
< |
Qry.Params[i].AsLong := PLong(data)^ |
| 2075 |
< |
else if rdFields[j].fdDataScale >= (-4) then |
| 2076 |
< |
Qry.Params[i].AsCurrency := PCurrency(data)^ |
| 2077 |
< |
else |
| 2078 |
< |
Qry.Params[i].AsDouble := PDouble(data)^; |
| 2079 |
< |
end; |
| 2080 |
< |
SQL_INT64: |
| 2081 |
< |
begin |
| 2082 |
< |
if rdFields[j].fdDataScale = 0 then |
| 2083 |
< |
Qry.Params[i].AsInt64 := PInt64(data)^ |
| 2084 |
< |
else if rdFields[j].fdDataScale >= (-4) then |
| 2085 |
< |
Qry.Params[i].AsCurrency := PCurrency(data)^ |
| 2086 |
< |
else |
| 2087 |
< |
Qry.Params[i].AsDouble := PDouble(data)^; |
| 2088 |
< |
end; |
| 2089 |
< |
SQL_BLOB, SQL_ARRAY, SQL_QUAD: |
| 2090 |
< |
Qry.Params[i].AsQuad := PISC_QUAD(data)^; |
| 2091 |
< |
SQL_TYPE_DATE: |
| 2092 |
< |
begin |
| 2093 |
< |
ts.Date := PInt(data)^; |
| 2094 |
< |
ts.Time := 0; |
| 2095 |
< |
Qry.Params[i].AsDate := |
| 2096 |
< |
TimeStampToDateTime(ts); |
| 2097 |
< |
end; |
| 2098 |
< |
SQL_TYPE_TIME: |
| 2099 |
< |
begin |
| 2100 |
< |
ts.Date := 0; |
| 2101 |
< |
ts.Time := PInt(data)^; |
| 2102 |
< |
Qry.Params[i].AsTime := |
| 2103 |
< |
TimeStampToDateTime(ts); |
| 2104 |
< |
end; |
| 2105 |
< |
SQL_TIMESTAMP: |
| 2106 |
< |
Qry.Params[i].AsDateTime := |
| 2107 |
< |
TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^))); |
| 2108 |
< |
end; |
| 2109 |
< |
end; |
| 2110 |
< |
end; |
| 2111 |
< |
end; |
| 2112 |
< |
finally |
| 2113 |
< |
if (OldBuffer <> nil) then |
| 2114 |
< |
FreeRecordBuffer(PChar(OldBuffer)); |
| 2115 |
< |
end; |
| 2116 |
< |
end; |
| 2117 |
< |
|
| 2118 |
< |
procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings); |
| 2119 |
< |
begin |
| 2120 |
< |
if FQRefresh.SQL.Text <> Value.Text then |
| 2121 |
< |
begin |
| 2122 |
< |
Disconnect; |
| 2123 |
< |
FQRefresh.SQL.Assign(Value); |
| 2124 |
< |
end; |
| 2125 |
< |
end; |
| 2126 |
< |
|
| 2127 |
< |
procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings); |
| 2128 |
< |
begin |
| 2129 |
< |
if FQSelect.SQL.Text <> Value.Text then |
| 2130 |
< |
begin |
| 2131 |
< |
Disconnect; |
| 2132 |
< |
FQSelect.SQL.Assign(Value); |
| 2133 |
< |
end; |
| 2134 |
< |
end; |
| 2135 |
< |
|
| 2136 |
< |
procedure TIBCustomDataSet.SetModifySQL(Value: TStrings); |
| 2137 |
< |
begin |
| 2138 |
< |
if FQModify.SQL.Text <> Value.Text then |
| 2139 |
< |
begin |
| 2140 |
< |
Disconnect; |
| 2141 |
< |
FQModify.SQL.Assign(Value); |
| 2142 |
< |
end; |
| 2143 |
< |
end; |
| 2144 |
< |
|
| 2145 |
< |
procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction); |
| 2146 |
< |
begin |
| 2147 |
< |
if (FBase.Transaction <> Value) then |
| 2148 |
< |
begin |
| 2149 |
< |
CheckDatasetClosed; |
| 2150 |
< |
FBase.Transaction := Value; |
| 2151 |
< |
FQDelete.Transaction := Value; |
| 2152 |
< |
FQInsert.Transaction := Value; |
| 2153 |
< |
FQRefresh.Transaction := Value; |
| 2154 |
< |
FQSelect.Transaction := Value; |
| 2155 |
< |
FQModify.Transaction := Value; |
| 2156 |
< |
end; |
| 2157 |
< |
end; |
| 2158 |
< |
|
| 2159 |
< |
procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean); |
| 2160 |
< |
begin |
| 2161 |
< |
CheckDatasetClosed; |
| 2162 |
< |
FUniDirectional := Value; |
| 2163 |
< |
end; |
| 2164 |
< |
|
| 2165 |
< |
procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes); |
| 2166 |
< |
begin |
| 2167 |
< |
FUpdateRecordTypes := Value; |
| 2168 |
< |
if Active then |
| 2169 |
< |
First; |
| 2170 |
< |
end; |
| 2171 |
< |
|
| 2172 |
< |
procedure TIBCustomDataSet.RefreshParams; |
| 2173 |
< |
var |
| 2174 |
< |
DataSet: TDataSet; |
| 2175 |
< |
begin |
| 2176 |
< |
DisableControls; |
| 2177 |
< |
try |
| 2178 |
< |
if FDataLink.DataSource <> nil then |
| 2179 |
< |
begin |
| 2180 |
< |
DataSet := FDataLink.DataSource.DataSet; |
| 2181 |
< |
if DataSet <> nil then |
| 2182 |
< |
if DataSet.Active and (DataSet.State <> dsSetKey) then |
| 2183 |
< |
begin |
| 2184 |
< |
Close; |
| 2185 |
< |
Open; |
| 2186 |
< |
end; |
| 2187 |
< |
end; |
| 2188 |
< |
finally |
| 2189 |
< |
EnableControls; |
| 2190 |
< |
end; |
| 2191 |
< |
end; |
| 2192 |
< |
|
| 2193 |
< |
|
| 2194 |
< |
procedure TIBCustomDataSet.SQLChanging(Sender: TObject); |
| 2195 |
< |
begin |
| 2196 |
< |
if FOpen then |
| 2197 |
< |
InternalClose; |
| 2198 |
< |
if FInternalPrepared then |
| 2199 |
< |
InternalUnPrepare; |
| 2200 |
< |
end; |
| 2201 |
< |
|
| 2202 |
< |
{ I can "undelete" uninserted records (make them "inserted" again). |
| 2203 |
< |
I can "undelete" cached deleted (the deletion hasn't yet occurred) } |
| 2204 |
< |
procedure TIBCustomDataSet.Undelete; |
| 2205 |
< |
var |
| 2206 |
< |
Buff: PRecordData; |
| 2207 |
< |
begin |
| 2208 |
< |
CheckActive; |
| 2209 |
< |
Buff := PRecordData(GetActiveBuf); |
| 2210 |
< |
with Buff^ do |
| 2211 |
< |
begin |
| 2212 |
< |
if rdCachedUpdateStatus = cusUninserted then |
| 2213 |
< |
begin |
| 2214 |
< |
rdCachedUpdateStatus := cusInserted; |
| 2215 |
< |
Dec(FDeletedRecords); |
| 2216 |
< |
end |
| 2217 |
< |
else if (rdUpdateStatus = usDeleted) and |
| 2218 |
< |
(rdCachedUpdateStatus = cusDeleted) then |
| 2219 |
< |
begin |
| 2220 |
< |
rdCachedUpdateStatus := cusUnmodified; |
| 2221 |
< |
rdUpdateStatus := usUnmodified; |
| 2222 |
< |
Dec(FDeletedRecords); |
| 2223 |
< |
end; |
| 2224 |
< |
WriteRecordCache(rdRecordNumber, PChar(Buff)); |
| 2225 |
< |
end; |
| 2226 |
< |
end; |
| 2227 |
< |
|
| 2228 |
< |
function TIBCustomDataSet.UpdateStatus: TUpdateStatus; |
| 2229 |
< |
begin |
| 2230 |
< |
if Active then |
| 2231 |
< |
if GetActiveBuf <> nil then |
| 2232 |
< |
result := PRecordData(GetActiveBuf)^.rdUpdateStatus |
| 2233 |
< |
else |
| 2234 |
< |
result := usUnmodified |
| 2235 |
< |
else |
| 2236 |
< |
result := usUnmodified; |
| 2237 |
< |
end; |
| 2238 |
< |
|
| 2239 |
< |
function TIBCustomDataSet.IsSequenced: Boolean; |
| 2240 |
< |
begin |
| 2241 |
< |
Result := Assigned( FQSelect ) and FQSelect.EOF; |
| 2242 |
< |
end; |
| 2243 |
< |
|
| 2244 |
< |
function TIBCustomDataSet.ParamByName(ParamName: String): TIBXSQLVAR; |
| 2245 |
< |
begin |
| 2246 |
< |
ActivateConnection; |
| 2247 |
< |
ActivateTransaction; |
| 2248 |
< |
if not FInternalPrepared then |
| 2249 |
< |
InternalPrepare; |
| 2250 |
< |
Result := Params.ByName(ParamName); |
| 2251 |
< |
end; |
| 2252 |
< |
|
| 2253 |
< |
{Beware: the parameter FCache is used as an identifier to determine which |
| 2254 |
< |
cache is being operated on and is not referenced in the computation. |
| 2255 |
< |
The result is an adjusted offset into the identified cache, either the |
| 2256 |
< |
Buffer Cache or the old Buffer Cache.} |
| 2257 |
< |
|
| 2258 |
< |
function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD; |
| 2259 |
< |
Origin: Integer): DWORD; |
| 2260 |
< |
var |
| 2261 |
< |
OldCacheSize: Integer; |
| 2262 |
< |
begin |
| 2263 |
< |
if (FCache = FBufferCache) then |
| 2264 |
< |
begin |
| 2265 |
< |
case Origin of |
| 2266 |
< |
FILE_BEGIN: FBPos := Offset; |
| 2267 |
< |
FILE_CURRENT: FBPos := FBPos + Offset; |
| 2268 |
< |
FILE_END: FBPos := DWORD(FBEnd) + Offset; |
| 2269 |
< |
end; |
| 2270 |
< |
OldCacheSize := FCacheSize; |
| 2271 |
< |
while (FBPos >= DWORD(FCacheSize)) do |
| 2272 |
< |
Inc(FCacheSize, FBufferChunkSize); |
| 2273 |
< |
if FCacheSize > OldCacheSize then |
| 2274 |
< |
IBAlloc(FBufferCache, FCacheSize, FCacheSize); |
| 2275 |
< |
result := FBPos; |
| 2276 |
< |
end |
| 2277 |
< |
else begin |
| 2278 |
< |
case Origin of |
| 2279 |
< |
FILE_BEGIN: FOBPos := Offset; |
| 2280 |
< |
FILE_CURRENT: FOBPos := FOBPos + Offset; |
| 2281 |
< |
FILE_END: FOBPos := DWORD(FOBEnd) + Offset; |
| 2282 |
< |
end; |
| 2283 |
< |
OldCacheSize := FOldCacheSize; |
| 2284 |
< |
while (FBPos >= DWORD(FOldCacheSize)) do |
| 2285 |
< |
Inc(FOldCacheSize, FBufferChunkSize); |
| 2286 |
< |
if FOldCacheSize > OldCacheSize then |
| 2287 |
< |
IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize); |
| 2288 |
< |
result := FOBPos; |
| 2289 |
< |
end; |
| 2290 |
< |
end; |
| 2291 |
< |
|
| 2292 |
< |
procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer; |
| 2293 |
< |
Buffer: PChar); |
| 2294 |
< |
var |
| 2295 |
< |
pCache: PChar; |
| 2296 |
< |
AdjustedOffset: DWORD; |
| 2297 |
< |
bOld: Boolean; |
| 2298 |
< |
begin |
| 2299 |
< |
bOld := (FCache = FOldBufferCache); |
| 2300 |
< |
AdjustedOffset := AdjustPosition(FCache, Offset, Origin); |
| 2301 |
< |
if not bOld then |
| 2302 |
< |
pCache := FBufferCache + AdjustedOffset |
| 2303 |
< |
else |
| 2304 |
< |
pCache := FOldBufferCache + AdjustedOffset; |
| 2305 |
< |
Move(pCache^, Buffer^, DWORD(FRecordBufferSize)); |
| 2306 |
< |
AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT); |
| 2307 |
< |
end; |
| 2308 |
< |
|
| 2309 |
< |
procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar; |
| 2310 |
< |
ReadOldBuffer: Boolean); |
| 2311 |
< |
begin |
| 2312 |
< |
if FUniDirectional then |
| 2313 |
< |
RecordNumber := RecordNumber mod UniCache; |
| 2314 |
< |
if (ReadOldBuffer) then |
| 2315 |
< |
begin |
| 2316 |
< |
ReadRecordCache(RecordNumber, Buffer, False); |
| 2317 |
< |
if FCachedUpdates and |
| 2318 |
< |
(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then |
| 2319 |
< |
ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN, |
| 2320 |
< |
Buffer) |
| 2321 |
< |
else |
| 2322 |
< |
if ReadOldBuffer and |
| 2323 |
< |
(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then |
| 2324 |
< |
CopyRecordBuffer( FOldBuffer, Buffer ) |
| 2325 |
< |
end |
| 2326 |
< |
else |
| 2327 |
< |
ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer); |
| 2328 |
< |
end; |
| 2329 |
< |
|
| 2330 |
< |
procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer; |
| 2331 |
< |
Buffer: PChar); |
| 2332 |
< |
var |
| 2333 |
< |
pCache: PChar; |
| 2334 |
< |
AdjustedOffset: DWORD; |
| 2335 |
< |
bOld: Boolean; |
| 2336 |
< |
dwEnd: DWORD; |
| 2337 |
< |
begin |
| 2338 |
< |
bOld := (FCache = FOldBufferCache); |
| 2339 |
< |
AdjustedOffset := AdjustPosition(FCache, Offset, Origin); |
| 2340 |
< |
if not bOld then |
| 2341 |
< |
pCache := FBufferCache + AdjustedOffset |
| 2342 |
< |
else |
| 2343 |
< |
pCache := FOldBufferCache + AdjustedOffset; |
| 2344 |
< |
Move(Buffer^, pCache^, FRecordBufferSize); |
| 2345 |
< |
dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT); |
| 2346 |
< |
if not bOld then |
| 2347 |
< |
begin |
| 2348 |
< |
if (dwEnd > FBEnd) then |
| 2349 |
< |
FBEnd := dwEnd; |
| 2350 |
< |
end |
| 2351 |
< |
else begin |
| 2352 |
< |
if (dwEnd > FOBEnd) then |
| 2353 |
< |
FOBEnd := dwEnd; |
| 2354 |
< |
end; |
| 2355 |
< |
end; |
| 2356 |
< |
|
| 2357 |
< |
procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar); |
| 2358 |
< |
begin |
| 2359 |
< |
if RecordNumber >= 0 then |
| 2360 |
< |
begin |
| 2361 |
< |
if FUniDirectional then |
| 2362 |
< |
RecordNumber := RecordNumber mod UniCache; |
| 2363 |
< |
WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer); |
| 2364 |
< |
end; |
| 2365 |
< |
end; |
| 2366 |
< |
|
| 2367 |
< |
function TIBCustomDataSet.AllocRecordBuffer: PChar; |
| 2368 |
< |
begin |
| 2369 |
< |
result := nil; |
| 2370 |
< |
IBAlloc(result, FRecordBufferSize, FRecordBufferSize); |
| 2371 |
< |
Move(FModelBuffer^, result^, FRecordBufferSize); |
| 2372 |
< |
end; |
| 2373 |
< |
|
| 2374 |
< |
function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; |
| 2375 |
< |
var |
| 2376 |
< |
pb: PBlobDataArray; |
| 2377 |
< |
fs: TIBBlobStream; |
| 2378 |
< |
Buff: PChar; |
| 2379 |
< |
bTr, bDB: Boolean; |
| 2380 |
< |
begin |
| 2381 |
< |
Buff := GetActiveBuf; |
| 2382 |
< |
if Buff = nil then |
| 2383 |
< |
begin |
| 2384 |
< |
fs := TIBBlobStream.Create; |
| 2385 |
< |
fs.Mode := bmReadWrite; |
| 2386 |
< |
FBlobStreamList.Add(Pointer(fs)); |
| 2387 |
< |
result := TIBDSBlobStream.Create(Field, fs, Mode); |
| 2388 |
< |
exit; |
| 2389 |
< |
end; |
| 2390 |
< |
pb := PBlobDataArray(Buff + FBlobCacheOffset); |
| 2391 |
< |
if pb^[Field.Offset] = nil then |
| 2392 |
< |
begin |
| 2393 |
< |
AdjustRecordOnInsert(Buff); |
| 2394 |
< |
pb^[Field.Offset] := TIBBlobStream.Create; |
| 2395 |
< |
fs := pb^[Field.Offset]; |
| 2396 |
< |
FBlobStreamList.Add(Pointer(fs)); |
| 2397 |
< |
fs.Mode := bmReadWrite; |
| 2398 |
< |
fs.Database := Database; |
| 2399 |
< |
fs.Transaction := Transaction; |
| 2400 |
< |
fs.BlobID := |
| 2401 |
< |
PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^; |
| 2402 |
< |
if (CachedUpdates) then |
| 2403 |
< |
begin |
| 2404 |
< |
bTr := not Transaction.InTransaction; |
| 2405 |
< |
bDB := not Database.Connected; |
| 2406 |
< |
if bDB then |
| 2407 |
< |
Database.Open; |
| 2408 |
< |
if bTr then |
| 2409 |
< |
Transaction.StartTransaction; |
| 2410 |
< |
fs.Seek(0, soFromBeginning); |
| 2411 |
< |
if bTr then |
| 2412 |
< |
Transaction.Commit; |
| 2413 |
< |
if bDB then |
| 2414 |
< |
Database.Close; |
| 2415 |
< |
end; |
| 2416 |
< |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff)); |
| 2417 |
< |
end else |
| 2418 |
< |
fs := pb^[Field.Offset]; |
| 2419 |
< |
result := TIBDSBlobStream.Create(Field, fs, Mode); |
| 2420 |
< |
end; |
| 2421 |
< |
|
| 2422 |
< |
function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; |
| 2423 |
< |
const |
| 2424 |
< |
CMPLess = -1; |
| 2425 |
< |
CMPEql = 0; |
| 2426 |
< |
CMPGtr = 1; |
| 2427 |
< |
RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess), |
| 2428 |
< |
(CMPGtr, CMPEql)); |
| 2429 |
< |
begin |
| 2430 |
< |
result := RetCodes[Bookmark1 = nil, Bookmark2 = nil]; |
| 2431 |
< |
|
| 2432 |
< |
if Result = 2 then |
| 2433 |
< |
begin |
| 2434 |
< |
if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then |
| 2435 |
< |
Result := CMPLess |
| 2436 |
< |
else |
| 2437 |
< |
if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then |
| 2438 |
< |
Result := CMPGtr |
| 2439 |
< |
else |
| 2440 |
< |
Result := CMPEql; |
| 2441 |
< |
end; |
| 2442 |
< |
end; |
| 2443 |
< |
|
| 2444 |
< |
procedure TIBCustomDataSet.DoBeforeDelete; |
| 2445 |
< |
var |
| 2446 |
< |
Buff: PRecordData; |
| 2447 |
< |
begin |
| 2448 |
< |
if not CanDelete then |
| 2449 |
< |
IBError(ibxeCannotDelete, [nil]); |
| 2450 |
< |
Buff := PRecordData(GetActiveBuf); |
| 2451 |
< |
if FCachedUpdates and |
| 2452 |
< |
(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then |
| 2453 |
< |
SaveOldBuffer(PChar(Buff)); |
| 2454 |
< |
inherited DoBeforeDelete; |
| 2455 |
< |
end; |
| 2456 |
< |
|
| 2457 |
< |
procedure TIBCustomDataSet.DoBeforeEdit; |
| 2458 |
< |
var |
| 2459 |
< |
Buff: PRecordData; |
| 2460 |
< |
begin |
| 2461 |
< |
Buff := PRecordData(GetActiveBuf); |
| 2462 |
< |
if not(CanEdit or (FQModify.SQL.Count <> 0) or |
| 2463 |
< |
(FCachedUpdates and Assigned(FOnUpdateRecord))) then |
| 2464 |
< |
IBError(ibxeCannotUpdate, [nil]); |
| 2465 |
< |
if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then |
| 2466 |
< |
SaveOldBuffer(PChar(Buff)); |
| 2467 |
< |
CopyRecordBuffer(GetActiveBuf, FOldBuffer); |
| 2468 |
< |
inherited DoBeforeEdit; |
| 2469 |
< |
end; |
| 2470 |
< |
|
| 2471 |
< |
procedure TIBCustomDataSet.DoBeforeInsert; |
| 2472 |
< |
begin |
| 2473 |
< |
if not CanInsert then |
| 2474 |
< |
IBError(ibxeCannotInsert, [nil]); |
| 2475 |
< |
inherited DoBeforeInsert; |
| 2476 |
< |
end; |
| 2477 |
< |
|
| 2478 |
< |
procedure TIBCustomDataSet.DoAfterInsert; |
| 2479 |
< |
begin |
| 2480 |
< |
if GeneratorField.ApplyOnEvent = gaeOnNewRecord then |
| 2481 |
< |
GeneratorField.Apply; |
| 2482 |
< |
inherited DoAfterInsert; |
| 2483 |
< |
end; |
| 2484 |
< |
|
| 2485 |
< |
procedure TIBCustomDataSet.DoBeforePost; |
| 2486 |
< |
begin |
| 2487 |
< |
inherited DoBeforePost; |
| 2488 |
< |
if (State = dsInsert) and |
| 2489 |
< |
(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then |
| 2490 |
< |
GeneratorField.Apply |
| 2491 |
< |
end; |
| 2492 |
< |
|
| 2493 |
< |
procedure TIBCustomDataSet.FetchAll; |
| 2494 |
< |
var |
| 2495 |
< |
SetCursor: Boolean; |
| 2496 |
< |
{$IF FPC_FULLVERSION > 20600 } |
| 2497 |
< |
CurBookmark: TBookmark; |
| 2498 |
< |
{$ELSE} |
| 2499 |
< |
CurBookmark: string; |
| 2500 |
< |
{$ENDIF} |
| 2501 |
< |
begin |
| 2502 |
< |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 2503 |
< |
if SetCursor then |
| 2504 |
< |
Screen.Cursor := crHourGlass; |
| 2505 |
< |
try |
| 2506 |
< |
if FQSelect.EOF or not FQSelect.Open then |
| 2507 |
< |
exit; |
| 2508 |
< |
DisableControls; |
| 2509 |
< |
try |
| 2510 |
< |
CurBookmark := Bookmark; |
| 2511 |
< |
Last; |
| 2512 |
< |
Bookmark := CurBookmark; |
| 2513 |
< |
finally |
| 2514 |
< |
EnableControls; |
| 2515 |
< |
end; |
| 2516 |
< |
finally |
| 2517 |
< |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 2518 |
< |
Screen.Cursor := crDefault; |
| 2519 |
< |
end; |
| 2520 |
< |
end; |
| 2521 |
< |
|
| 2522 |
< |
procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar); |
| 2523 |
< |
begin |
| 2524 |
< |
FreeMem(Buffer); |
| 2525 |
< |
Buffer := nil; |
| 2526 |
< |
end; |
| 2527 |
< |
|
| 2528 |
< |
procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer); |
| 2529 |
< |
begin |
| 2530 |
< |
Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize); |
| 2531 |
< |
end; |
| 2532 |
< |
|
| 2533 |
< |
function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; |
| 2534 |
< |
begin |
| 2535 |
< |
result := PRecordData(Buffer)^.rdBookmarkFlag; |
| 2536 |
< |
end; |
| 2537 |
< |
|
| 2538 |
< |
function TIBCustomDataSet.GetCanModify: Boolean; |
| 2539 |
< |
begin |
| 2540 |
< |
result := (FQInsert.SQL.Text <> '') or |
| 2541 |
< |
(FQModify.SQL.Text <> '') or |
| 2542 |
< |
(FQDelete.SQL.Text <> '') or |
| 2543 |
< |
(Assigned(FUpdateObject)); |
| 2544 |
< |
end; |
| 2545 |
< |
|
| 2546 |
< |
function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean; |
| 2547 |
< |
begin |
| 2548 |
< |
if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then |
| 2549 |
< |
begin |
| 2550 |
< |
UpdateCursorPos; |
| 2551 |
< |
ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False); |
| 2552 |
< |
result := True; |
| 2553 |
< |
end |
| 2554 |
< |
else |
| 2555 |
< |
result := False; |
| 2556 |
< |
end; |
| 2557 |
< |
|
| 2558 |
< |
function TIBCustomDataSet.GetDataSource: TDataSource; |
| 2559 |
< |
begin |
| 2560 |
< |
if FDataLink = nil then |
| 2561 |
< |
result := nil |
| 2562 |
< |
else |
| 2563 |
< |
result := FDataLink.DataSource; |
| 2564 |
< |
end; |
| 2565 |
< |
|
| 2566 |
< |
function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass; |
| 2567 |
< |
begin |
| 2568 |
< |
Result := DefaultFieldClasses[FieldType]; |
| 2569 |
< |
end; |
| 2570 |
< |
|
| 2571 |
< |
function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; |
| 2572 |
< |
begin |
| 2573 |
< |
result := GetFieldData(FieldByNumber(FieldNo), buffer); |
| 2574 |
< |
end; |
| 2575 |
< |
|
| 2576 |
< |
function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; |
| 2577 |
< |
var |
| 2578 |
< |
Buff, Data: PChar; |
| 2579 |
< |
CurrentRecord: PRecordData; |
| 2580 |
< |
begin |
| 2581 |
< |
result := False; |
| 2582 |
< |
Buff := GetActiveBuf; |
| 2583 |
< |
if (Buff = nil) or |
| 2584 |
< |
(not IsVisible(Buff)) or not assigned(Field.DataSet) then |
| 2585 |
< |
exit; |
| 2586 |
< |
{ The intention here is to stuff the buffer with the data for the |
| 2587 |
< |
referenced field for the current record } |
| 2588 |
< |
CurrentRecord := PRecordData(Buff); |
| 2589 |
< |
if (Field.FieldNo < 0) then |
| 2590 |
< |
begin |
| 2591 |
< |
Inc(Buff, FRecordSize + Field.Offset); |
| 2592 |
< |
result := Boolean(Buff[0]); |
| 2593 |
< |
if result and (Buffer <> nil) then |
| 2594 |
< |
Move(Buff[1], Buffer^, Field.DataSize); |
| 2595 |
< |
end |
| 2596 |
< |
else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and |
| 2597 |
< |
(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then |
| 2598 |
< |
begin |
| 2599 |
< |
result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull; |
| 2600 |
< |
if result and (Buffer <> nil) then |
| 2601 |
< |
with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do |
| 2602 |
< |
begin |
| 2603 |
< |
Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs; |
| 2604 |
< |
if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then |
| 2605 |
< |
begin |
| 2606 |
< |
if fdDataLength <= Field.Size then |
| 2607 |
< |
begin |
| 2608 |
< |
Move(Data^, Buffer^, fdDataLength); |
| 2609 |
< |
PChar(Buffer)[fdDataLength] := #0; |
| 2610 |
< |
end |
| 2611 |
< |
else |
| 2612 |
< |
IBError(ibxeFieldSizeError,[Field.FieldName]) |
| 2613 |
< |
end |
| 2614 |
< |
else |
| 2615 |
< |
Move(Data^, Buffer^, Field.DataSize); |
| 2616 |
< |
end; |
| 2617 |
< |
end; |
| 2618 |
< |
end; |
| 2619 |
< |
|
| 2620 |
< |
{ GetRecNo and SetRecNo both operate off of 1-based indexes as |
| 2621 |
< |
opposed to 0-based indexes. |
| 2622 |
< |
This is because we want LastRecordNumber/RecordCount = 1 } |
| 2623 |
< |
|
| 2624 |
< |
function TIBCustomDataSet.GetRecNo: Integer; |
| 2625 |
< |
begin |
| 2626 |
< |
if GetActiveBuf = nil then |
| 2627 |
< |
result := 0 |
| 2628 |
< |
else |
| 2629 |
< |
result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1; |
| 2630 |
< |
end; |
| 2631 |
< |
|
| 2632 |
< |
function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode; |
| 2633 |
< |
DoCheck: Boolean): TGetResult; |
| 2634 |
< |
var |
| 2635 |
< |
Accept: Boolean; |
| 2636 |
< |
SaveState: TDataSetState; |
| 2637 |
< |
begin |
| 2638 |
< |
Result := grOK; |
| 2639 |
< |
if Filtered and Assigned(OnFilterRecord) then |
| 2640 |
< |
begin |
| 2641 |
< |
Accept := False; |
| 2642 |
< |
SaveState := SetTempState(dsFilter); |
| 2643 |
< |
while not Accept do |
| 2644 |
< |
begin |
| 2645 |
< |
Result := InternalGetRecord(Buffer, GetMode, DoCheck); |
| 2646 |
< |
if Result <> grOK then |
| 2647 |
< |
break; |
| 2648 |
< |
FFilterBuffer := Buffer; |
| 2649 |
< |
try |
| 2650 |
< |
Accept := True; |
| 2651 |
< |
OnFilterRecord(Self, Accept); |
| 2652 |
< |
if not Accept and (GetMode = gmCurrent) then |
| 2653 |
< |
GetMode := gmPrior; |
| 2654 |
< |
except |
| 2655 |
< |
// Application.HandleException(Self); |
| 2656 |
< |
end; |
| 2657 |
< |
end; |
| 2658 |
< |
RestoreState(SaveState); |
| 2659 |
< |
end |
| 2660 |
< |
else |
| 2661 |
< |
Result := InternalGetRecord(Buffer, GetMode, DoCheck); |
| 2662 |
< |
end; |
| 2663 |
< |
|
| 2664 |
< |
function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode; |
| 2665 |
< |
DoCheck: Boolean): TGetResult; |
| 2666 |
< |
begin |
| 2667 |
< |
result := grError; |
| 2668 |
< |
case GetMode of |
| 2669 |
< |
gmCurrent: begin |
| 2670 |
< |
if (FCurrentRecord >= 0) then begin |
| 2671 |
< |
if FCurrentRecord < FRecordCount then |
| 2672 |
< |
ReadRecordCache(FCurrentRecord, Buffer, False) |
| 2673 |
< |
else begin |
| 2674 |
< |
while (not FQSelect.EOF) and |
| 2675 |
< |
(FQSelect.Next <> nil) and |
| 2676 |
< |
(FCurrentRecord >= FRecordCount) do begin |
| 2677 |
< |
FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer); |
| 2678 |
< |
Inc(FRecordCount); |
| 2679 |
< |
end; |
| 2680 |
< |
FCurrentRecord := FRecordCount - 1; |
| 2681 |
< |
if (FCurrentRecord >= 0) then |
| 2682 |
< |
ReadRecordCache(FCurrentRecord, Buffer, False); |
| 2683 |
< |
end; |
| 2684 |
< |
result := grOk; |
| 2685 |
< |
end else |
| 2686 |
< |
result := grBOF; |
| 2687 |
< |
end; |
| 2688 |
< |
gmNext: begin |
| 2689 |
< |
result := grOk; |
| 2690 |
< |
if FCurrentRecord = FRecordCount then |
| 2691 |
< |
result := grEOF |
| 2692 |
< |
else if FCurrentRecord = FRecordCount - 1 then begin |
| 2693 |
< |
if (not FQSelect.EOF) then begin |
| 2694 |
< |
FQSelect.Next; |
| 2695 |
< |
Inc(FCurrentRecord); |
| 2696 |
< |
end; |
| 2697 |
< |
if (FQSelect.EOF) then begin |
| 2698 |
< |
result := grEOF; |
| 2699 |
< |
end else begin |
| 2700 |
< |
Inc(FRecordCount); |
| 2701 |
< |
FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer); |
| 2702 |
< |
end; |
| 2703 |
< |
end else if (FCurrentRecord < FRecordCount) then begin |
| 2704 |
< |
Inc(FCurrentRecord); |
| 2705 |
< |
ReadRecordCache(FCurrentRecord, Buffer, False); |
| 2706 |
< |
end; |
| 2707 |
< |
end; |
| 2708 |
< |
else { gmPrior } |
| 2709 |
< |
begin |
| 2710 |
< |
if (FCurrentRecord = 0) then begin |
| 2711 |
< |
Dec(FCurrentRecord); |
| 2712 |
< |
result := grBOF; |
| 2713 |
< |
end else if (FCurrentRecord > 0) and |
| 2714 |
< |
(FCurrentRecord <= FRecordCount) then begin |
| 2715 |
< |
Dec(FCurrentRecord); |
| 2716 |
< |
ReadRecordCache(FCurrentRecord, Buffer, False); |
| 2717 |
< |
result := grOk; |
| 2718 |
< |
end else if (FCurrentRecord = -1) then |
| 2719 |
< |
result := grBOF; |
| 2720 |
< |
end; |
| 2721 |
< |
end; |
| 2722 |
< |
if result = grOk then |
| 2723 |
< |
result := AdjustCurrentRecord(Buffer, GetMode); |
| 2724 |
< |
if result = grOk then with PRecordData(Buffer)^ do begin |
| 2725 |
< |
rdBookmarkFlag := bfCurrent; |
| 2726 |
< |
GetCalcFields(Buffer); |
| 2727 |
< |
end else if (result = grEOF) then begin |
| 2728 |
< |
CopyRecordBuffer(FModelBuffer, Buffer); |
| 2729 |
< |
PRecordData(Buffer)^.rdBookmarkFlag := bfEOF; |
| 2730 |
< |
end else if (result = grBOF) then begin |
| 2731 |
< |
CopyRecordBuffer(FModelBuffer, Buffer); |
| 2732 |
< |
PRecordData(Buffer)^.rdBookmarkFlag := bfBOF; |
| 2733 |
< |
end else if (result = grError) then begin |
| 2734 |
< |
CopyRecordBuffer(FModelBuffer, Buffer); |
| 2735 |
< |
PRecordData(Buffer)^.rdBookmarkFlag := bfEOF; |
| 2736 |
< |
end;; |
| 2737 |
< |
end; |
| 2738 |
< |
|
| 2739 |
< |
function TIBCustomDataSet.GetRecordCount: Integer; |
| 2740 |
< |
begin |
| 2741 |
< |
result := FRecordCount - FDeletedRecords; |
| 2742 |
< |
end; |
| 2743 |
< |
|
| 2744 |
< |
function TIBCustomDataSet.GetRecordSize: Word; |
| 2745 |
< |
begin |
| 2746 |
< |
result := FRecordBufferSize; |
| 2747 |
< |
end; |
| 2748 |
< |
|
| 2749 |
< |
procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean); |
| 2750 |
< |
begin |
| 2751 |
< |
CheckEditState; |
| 2752 |
< |
begin |
| 2753 |
< |
{ When adding records, we *always* append. |
| 2754 |
< |
Insertion is just too costly } |
| 2755 |
< |
AdjustRecordOnInsert(Buffer); |
| 2756 |
< |
with PRecordData(Buffer)^ do |
| 2757 |
< |
begin |
| 2758 |
< |
rdUpdateStatus := usInserted; |
| 2759 |
< |
rdCachedUpdateStatus := cusInserted; |
| 2760 |
< |
end; |
| 2761 |
< |
if not CachedUpdates then |
| 2762 |
< |
InternalPostRecord(FQInsert, Buffer) |
| 2763 |
< |
else begin |
| 2764 |
< |
WriteRecordCache(FCurrentRecord, Buffer); |
| 2765 |
< |
FUpdatesPending := True; |
| 2766 |
< |
end; |
| 2767 |
< |
Inc(FRecordCount); |
| 2768 |
< |
InternalSetToRecord(Buffer); |
| 2769 |
< |
end |
| 2770 |
< |
end; |
| 2771 |
< |
|
| 2772 |
< |
procedure TIBCustomDataSet.InternalCancel; |
| 2773 |
< |
var |
| 2774 |
< |
Buff: PChar; |
| 2775 |
< |
CurRec: Integer; |
| 2776 |
< |
begin |
| 2777 |
< |
inherited InternalCancel; |
| 2778 |
< |
Buff := GetActiveBuf; |
| 2779 |
< |
if Buff <> nil then begin |
| 2780 |
< |
CurRec := FCurrentRecord; |
| 2781 |
< |
AdjustRecordOnInsert(Buff); |
| 2782 |
< |
if (State = dsEdit) then begin |
| 2783 |
< |
CopyRecordBuffer(FOldBuffer, Buff); |
| 2784 |
< |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 2785 |
< |
end else begin |
| 2786 |
< |
CopyRecordBuffer(FModelBuffer, Buff); |
| 2787 |
< |
PRecordData(Buff)^.rdUpdateStatus := usDeleted; |
| 2788 |
< |
PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified; |
| 2789 |
< |
PRecordData(Buff)^.rdBookmarkFlag := bfEOF; |
| 2790 |
< |
FCurrentRecord := CurRec; |
| 2791 |
< |
end; |
| 2792 |
< |
end; |
| 2793 |
< |
end; |
| 2794 |
< |
|
| 2795 |
< |
|
| 2796 |
< |
procedure TIBCustomDataSet.InternalClose; |
| 2797 |
< |
begin |
| 2798 |
< |
if FDidActivate then |
| 2799 |
< |
DeactivateTransaction; |
| 2800 |
< |
FQSelect.Close; |
| 2801 |
< |
ClearBlobCache; |
| 2802 |
< |
FreeRecordBuffer(FModelBuffer); |
| 2803 |
< |
FreeRecordBuffer(FOldBuffer); |
| 2804 |
< |
FCurrentRecord := -1; |
| 2805 |
< |
FOpen := False; |
| 2806 |
< |
FRecordCount := 0; |
| 2807 |
< |
FDeletedRecords := 0; |
| 2808 |
< |
FRecordSize := 0; |
| 2809 |
< |
FBPos := 0; |
| 2810 |
< |
FOBPos := 0; |
| 2811 |
< |
FCacheSize := 0; |
| 2812 |
< |
FOldCacheSize := 0; |
| 2813 |
< |
FBEnd := 0; |
| 2814 |
< |
FOBEnd := 0; |
| 2815 |
< |
FreeMem(FBufferCache); |
| 2816 |
< |
FBufferCache := nil; |
| 2817 |
< |
FreeMem(FOldBufferCache); |
| 2818 |
< |
FOldBufferCache := nil; |
| 2819 |
< |
BindFields(False); |
| 2820 |
< |
if DefaultFields then DestroyFields; |
| 2821 |
< |
end; |
| 2822 |
< |
|
| 2823 |
< |
procedure TIBCustomDataSet.InternalDelete; |
| 2824 |
< |
var |
| 2825 |
< |
Buff: PChar; |
| 2826 |
< |
SetCursor: Boolean; |
| 2827 |
< |
begin |
| 2828 |
< |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 2829 |
< |
if SetCursor then |
| 2830 |
< |
Screen.Cursor := crHourGlass; |
| 2831 |
< |
try |
| 2832 |
< |
Buff := GetActiveBuf; |
| 2833 |
< |
if CanDelete then |
| 2834 |
< |
begin |
| 2835 |
< |
if not CachedUpdates then |
| 2836 |
< |
InternalDeleteRecord(FQDelete, Buff) |
| 2837 |
< |
else |
| 2838 |
< |
begin |
| 2839 |
< |
with PRecordData(Buff)^ do |
| 2840 |
< |
begin |
| 2841 |
< |
if rdCachedUpdateStatus = cusInserted then |
| 2842 |
< |
rdCachedUpdateStatus := cusUninserted |
| 2843 |
< |
else begin |
| 2844 |
< |
rdUpdateStatus := usDeleted; |
| 2845 |
< |
rdCachedUpdateStatus := cusDeleted; |
| 2846 |
< |
end; |
| 2847 |
< |
end; |
| 2848 |
< |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 2849 |
< |
end; |
| 2850 |
< |
Inc(FDeletedRecords); |
| 2851 |
< |
FUpdatesPending := True; |
| 2852 |
< |
end else |
| 2853 |
< |
IBError(ibxeCannotDelete, [nil]); |
| 2854 |
< |
finally |
| 2855 |
< |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 2856 |
< |
Screen.Cursor := crDefault; |
| 2857 |
< |
end; |
| 2858 |
< |
end; |
| 2859 |
< |
|
| 2860 |
< |
procedure TIBCustomDataSet.InternalFirst; |
| 2861 |
< |
begin |
| 2862 |
< |
FCurrentRecord := -1; |
| 2863 |
< |
end; |
| 2864 |
< |
|
| 2865 |
< |
procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer); |
| 2866 |
< |
begin |
| 2867 |
< |
FCurrentRecord := PInteger(Bookmark)^; |
| 2868 |
< |
end; |
| 2869 |
< |
|
| 2870 |
< |
procedure TIBCustomDataSet.InternalHandleException; |
| 2871 |
< |
begin |
| 2872 |
< |
Application.HandleException(Self) |
| 2873 |
< |
end; |
| 2874 |
< |
|
| 2875 |
< |
procedure TIBCustomDataSet.InternalInitFieldDefs; |
| 2876 |
< |
const |
| 2877 |
< |
DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize} |
| 2878 |
< |
'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize} |
| 2879 |
< |
'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize} |
| 2880 |
< |
'where R.RDB$RELATION_NAME = :RELATION ' + {do not localize} |
| 2881 |
< |
'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize} |
| 2882 |
< |
'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize} |
| 2883 |
< |
' (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize} |
| 2884 |
< |
var |
| 2885 |
< |
FieldType: TFieldType; |
| 2886 |
< |
FieldSize: Word; |
| 2887 |
< |
FieldNullable : Boolean; |
| 2888 |
< |
i, FieldPosition, FieldPrecision: Integer; |
| 2889 |
< |
FieldAliasName: string; |
| 2890 |
< |
RelationName, FieldName: string; |
| 2891 |
< |
Query : TIBSQL; |
| 2892 |
< |
FieldIndex: Integer; |
| 2893 |
< |
FRelationNodes : TRelationNode; |
| 2894 |
< |
|
| 2895 |
< |
function Add_Node(Relation, Field : String) : TRelationNode; |
| 2896 |
< |
var |
| 2897 |
< |
FField : TFieldNode; |
| 2898 |
< |
begin |
| 2899 |
< |
if FRelationNodes.RelationName = '' then |
| 2900 |
< |
Result := FRelationNodes |
| 2901 |
< |
else |
| 2902 |
< |
begin |
| 2903 |
< |
Result := TRelationNode.Create; |
| 2904 |
< |
Result.NextRelation := FRelationNodes; |
| 2905 |
< |
end; |
| 2906 |
< |
Result.RelationName := Relation; |
| 2907 |
< |
FRelationNodes := Result; |
| 2908 |
< |
Query.Params[0].AsString := Relation; |
| 2909 |
< |
Query.ExecQuery; |
| 2910 |
< |
while not Query.Eof do |
| 2911 |
< |
begin |
| 2912 |
< |
FField := TFieldNode.Create; |
| 2913 |
< |
FField.FieldName := Query.Fields[2].AsString; |
| 2914 |
< |
FField.DEFAULT_VALUE := not Query.Fields[1].IsNull; |
| 2915 |
< |
FField.COMPUTED_BLR := not Query.Fields[0].IsNull; |
| 2916 |
< |
FField.NextField := Result.FieldNodes; |
| 2917 |
< |
Result.FieldNodes := FField; |
| 2918 |
< |
Query.Next; |
| 2919 |
< |
end; |
| 2920 |
< |
Query.Close; |
| 2921 |
< |
end; |
| 2922 |
< |
|
| 2923 |
< |
function Has_COMPUTED_BLR(Relation, Field : String) : Boolean; |
| 2924 |
< |
var |
| 2925 |
< |
FRelation : TRelationNode; |
| 2926 |
< |
FField : TFieldNode; |
| 2927 |
< |
begin |
| 2928 |
< |
FRelation := FRelationNodes; |
| 2929 |
< |
while Assigned(FRelation) and |
| 2930 |
< |
(FRelation.RelationName <> Relation) do |
| 2931 |
< |
FRelation := FRelation.NextRelation; |
| 2932 |
< |
if not Assigned(FRelation) then |
| 2933 |
< |
FRelation := Add_Node(Relation, Field); |
| 2934 |
< |
Result := false; |
| 2935 |
< |
FField := FRelation.FieldNodes; |
| 2936 |
< |
while Assigned(FField) do |
| 2937 |
< |
if FField.FieldName = Field then |
| 2938 |
< |
begin |
| 2939 |
< |
Result := Ffield.COMPUTED_BLR; |
| 2940 |
< |
Exit; |
| 2941 |
< |
end |
| 2942 |
< |
else |
| 2943 |
< |
FField := Ffield.NextField; |
| 2944 |
< |
end; |
| 2945 |
< |
|
| 2946 |
< |
function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean; |
| 2947 |
< |
var |
| 2948 |
< |
FRelation : TRelationNode; |
| 2949 |
< |
FField : TFieldNode; |
| 2950 |
< |
begin |
| 2951 |
< |
FRelation := FRelationNodes; |
| 2952 |
< |
while Assigned(FRelation) and |
| 2953 |
< |
(FRelation.RelationName <> Relation) do |
| 2954 |
< |
FRelation := FRelation.NextRelation; |
| 2955 |
< |
if not Assigned(FRelation) then |
| 2956 |
< |
FRelation := Add_Node(Relation, Field); |
| 2957 |
< |
Result := false; |
| 2958 |
< |
FField := FRelation.FieldNodes; |
| 2959 |
< |
while Assigned(FField) do |
| 2960 |
< |
if FField.FieldName = Field then |
| 2961 |
< |
begin |
| 2962 |
< |
Result := Ffield.DEFAULT_VALUE; |
| 2963 |
< |
Exit; |
| 2964 |
< |
end |
| 2965 |
< |
else |
| 2966 |
< |
FField := Ffield.NextField; |
| 2967 |
< |
end; |
| 2968 |
< |
|
| 2969 |
< |
Procedure FreeNodes; |
| 2970 |
< |
var |
| 2971 |
< |
FRelation : TRelationNode; |
| 2972 |
< |
FField : TFieldNode; |
| 2973 |
< |
begin |
| 2974 |
< |
while Assigned(FRelationNodes) do |
| 2975 |
< |
begin |
| 2976 |
< |
While Assigned(FRelationNodes.FieldNodes) do |
| 2977 |
< |
begin |
| 2978 |
< |
FField := FRelationNodes.FieldNodes.NextField; |
| 2979 |
< |
FRelationNodes.FieldNodes.Free; |
| 2980 |
< |
FRelationNodes.FieldNodes := FField; |
| 2981 |
< |
end; |
| 2982 |
< |
FRelation := FRelationNodes.NextRelation; |
| 2983 |
< |
FRelationNodes.Free; |
| 2984 |
< |
FRelationNodes := FRelation; |
| 2985 |
< |
end; |
| 2986 |
< |
end; |
| 2987 |
< |
|
| 2988 |
< |
begin |
| 2989 |
< |
if not InternalPrepared then |
| 2990 |
< |
begin |
| 2991 |
< |
InternalPrepare; |
| 2992 |
< |
exit; |
| 2993 |
< |
end; |
| 2994 |
< |
FRelationNodes := TRelationNode.Create; |
| 2995 |
< |
FNeedsRefresh := False; |
| 2996 |
< |
Database.InternalTransaction.StartTransaction; |
| 2997 |
< |
Query := TIBSQL.Create(self); |
| 2998 |
< |
try |
| 2999 |
< |
Query.Database := DataBase; |
| 3000 |
< |
Query.Transaction := Database.InternalTransaction; |
| 3001 |
< |
FieldDefs.BeginUpdate; |
| 3002 |
< |
FieldDefs.Clear; |
| 3003 |
< |
FieldIndex := 0; |
| 3004 |
< |
if (Length(FMappedFieldPosition) < FQSelect.Current.Count) then |
| 3005 |
< |
SetLength(FMappedFieldPosition, FQSelect.Current.Count); |
| 3006 |
< |
Query.SQL.Text := DefaultSQL; |
| 3007 |
< |
Query.Prepare; |
| 3008 |
< |
for i := 0 to FQSelect.Current.Count - 1 do |
| 3009 |
< |
with FQSelect.Current[i].Data^ do |
| 3010 |
< |
begin |
| 3011 |
< |
{ Get the field name } |
| 3012 |
< |
SetString(FieldAliasName, aliasname, aliasname_length); |
| 3013 |
< |
SetString(RelationName, relname, relname_length); |
| 3014 |
< |
SetString(FieldName, sqlname, sqlname_length); |
| 3015 |
< |
FieldSize := 0; |
| 3016 |
< |
FieldPrecision := 0; |
| 3017 |
< |
FieldNullable := FQSelect.Current[i].IsNullable; |
| 3018 |
< |
case sqltype and not 1 of |
| 3019 |
< |
{ All VARCHAR's must be converted to strings before recording |
| 3020 |
< |
their values } |
| 3021 |
< |
SQL_VARYING, SQL_TEXT: |
| 3022 |
< |
begin |
| 3023 |
< |
FieldSize := sqllen; |
| 3024 |
< |
FieldType := ftString; |
| 3025 |
< |
end; |
| 3026 |
< |
{ All Doubles/Floats should be cast to doubles } |
| 3027 |
< |
SQL_DOUBLE, SQL_FLOAT: |
| 3028 |
< |
FieldType := ftFloat; |
| 3029 |
< |
SQL_SHORT: |
| 3030 |
< |
begin |
| 3031 |
< |
if (sqlscale = 0) then |
| 3032 |
< |
FieldType := ftSmallInt |
| 3033 |
< |
else begin |
| 3034 |
< |
FieldType := ftBCD; |
| 3035 |
< |
FieldPrecision := 4; |
| 3036 |
< |
FieldSize := -sqlscale; |
| 3037 |
< |
end; |
| 3038 |
< |
end; |
| 3039 |
< |
SQL_LONG: |
| 3040 |
< |
begin |
| 3041 |
< |
if (sqlscale = 0) then |
| 3042 |
< |
FieldType := ftInteger |
| 3043 |
< |
else if (sqlscale >= (-4)) then |
| 3044 |
< |
begin |
| 3045 |
< |
FieldType := ftBCD; |
| 3046 |
< |
FieldPrecision := 9; |
| 3047 |
< |
FieldSize := -sqlscale; |
| 3048 |
< |
end |
| 3049 |
< |
else |
| 3050 |
< |
if Database.SQLDialect = 1 then |
| 3051 |
< |
FieldType := ftFloat |
| 3052 |
< |
else |
| 3053 |
< |
if (FieldCount > i) and (Fields[i] is TFloatField) then |
| 3054 |
< |
FieldType := ftFloat |
| 3055 |
< |
else |
| 3056 |
< |
begin |
| 3057 |
< |
FieldType := ftFMTBCD; |
| 3058 |
< |
FieldPrecision := 9; |
| 3059 |
< |
FieldSize := -sqlscale; |
| 3060 |
< |
end; |
| 3061 |
< |
end; |
| 3062 |
< |
|
| 3063 |
< |
SQL_INT64: |
| 3064 |
< |
begin |
| 3065 |
< |
if (sqlscale = 0) then |
| 3066 |
< |
FieldType := ftLargeInt |
| 3067 |
< |
else if (sqlscale >= (-4)) then |
| 3068 |
< |
begin |
| 3069 |
< |
FieldType := ftBCD; |
| 3070 |
< |
FieldPrecision := 18; |
| 3071 |
< |
FieldSize := -sqlscale; |
| 3072 |
< |
end |
| 3073 |
< |
else |
| 3074 |
< |
FieldType := ftFloat |
| 3075 |
< |
end; |
| 3076 |
< |
SQL_TIMESTAMP: FieldType := ftDateTime; |
| 3077 |
< |
SQL_TYPE_TIME: FieldType := ftTime; |
| 3078 |
< |
SQL_TYPE_DATE: FieldType := ftDate; |
| 3079 |
< |
SQL_BLOB: |
| 3080 |
< |
begin |
| 3081 |
< |
FieldSize := sizeof (TISC_QUAD); |
| 3082 |
< |
if (sqlsubtype = 1) then |
| 3083 |
< |
FieldType := ftmemo |
| 3084 |
< |
else |
| 3085 |
< |
FieldType := ftBlob; |
| 3086 |
< |
end; |
| 3087 |
< |
SQL_ARRAY: |
| 3088 |
< |
begin |
| 3089 |
< |
FieldSize := sizeof (TISC_QUAD); |
| 3090 |
< |
FieldType := ftUnknown; |
| 3091 |
< |
end; |
| 3092 |
< |
else |
| 3093 |
< |
FieldType := ftUnknown; |
| 3094 |
< |
end; |
| 3095 |
< |
FieldPosition := i + 1; |
| 3096 |
< |
if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize} |
| 3097 |
< |
begin |
| 3098 |
< |
FMappedFieldPosition[FieldIndex] := FieldPosition; |
| 3099 |
< |
Inc(FieldIndex); |
| 3100 |
< |
with FieldDefs.AddFieldDef do |
| 3101 |
< |
begin |
| 3102 |
< |
Name := FieldAliasName; |
| 3103 |
< |
(* FieldNo := FieldPosition;*) |
| 3104 |
< |
DataType := FieldType; |
| 3105 |
< |
Size := FieldSize; |
| 3106 |
< |
Precision := FieldPrecision; |
| 3107 |
< |
Required := not FieldNullable; |
| 3108 |
< |
InternalCalcField := False; |
| 3109 |
< |
if (FieldName <> '') and (RelationName <> '') then |
| 3110 |
< |
begin |
| 3111 |
< |
if Has_COMPUTED_BLR(RelationName, FieldName) then |
| 3112 |
< |
begin |
| 3113 |
< |
Attributes := [faReadOnly]; |
| 3114 |
< |
InternalCalcField := True; |
| 3115 |
< |
FNeedsRefresh := True; |
| 3116 |
< |
end |
| 3117 |
< |
else |
| 3118 |
< |
begin |
| 3119 |
< |
if Has_DEFAULT_VALUE(RelationName, FieldName) then |
| 3120 |
< |
begin |
| 3121 |
< |
if not FieldNullable then |
| 3122 |
< |
Attributes := [faRequired]; |
| 3123 |
< |
end |
| 3124 |
< |
else |
| 3125 |
< |
FNeedsRefresh := True; |
| 3126 |
< |
end; |
| 3127 |
< |
end; |
| 3128 |
< |
end; |
| 3129 |
< |
end; |
| 3130 |
< |
end; |
| 3131 |
< |
finally |
| 3132 |
< |
Query.free; |
| 3133 |
< |
FreeNodes; |
| 3134 |
< |
Database.InternalTransaction.Commit; |
| 3135 |
< |
FieldDefs.EndUpdate; |
| 3136 |
< |
end; |
| 3137 |
< |
end; |
| 3138 |
< |
|
| 3139 |
< |
procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar); |
| 3140 |
< |
begin |
| 3141 |
< |
CopyRecordBuffer(FModelBuffer, Buffer); |
| 3142 |
< |
end; |
| 3143 |
< |
|
| 3144 |
< |
procedure TIBCustomDataSet.InternalLast; |
| 3145 |
< |
var |
| 3146 |
< |
Buffer: PChar; |
| 3147 |
< |
begin |
| 3148 |
< |
if (FQSelect.EOF) then |
| 3149 |
< |
FCurrentRecord := FRecordCount |
| 3150 |
< |
else begin |
| 3151 |
< |
Buffer := AllocRecordBuffer; |
| 3152 |
< |
try |
| 3153 |
< |
while FQSelect.Next <> nil do |
| 3154 |
< |
begin |
| 3155 |
< |
FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer); |
| 3156 |
< |
Inc(FRecordCount); |
| 3157 |
< |
end; |
| 3158 |
< |
FCurrentRecord := FRecordCount; |
| 3159 |
< |
finally |
| 3160 |
< |
FreeRecordBuffer(Buffer); |
| 3161 |
< |
end; |
| 3162 |
< |
end; |
| 3163 |
< |
end; |
| 3164 |
< |
|
| 3165 |
< |
procedure TIBCustomDataSet.InternalSetParamsFromCursor; |
| 3166 |
< |
var |
| 3167 |
< |
i: Integer; |
| 3168 |
< |
cur_param: TIBXSQLVAR; |
| 3169 |
< |
cur_field: TField; |
| 3170 |
< |
s: TStream; |
| 3171 |
< |
begin |
| 3172 |
< |
if FQSelect.SQL.Text = '' then |
| 3173 |
< |
IBError(ibxeEmptyQuery, [nil]); |
| 3174 |
< |
if not FInternalPrepared then |
| 3175 |
< |
InternalPrepare; |
| 3176 |
< |
if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then |
| 3177 |
< |
begin |
| 3178 |
< |
for i := 0 to SQLParams.Count - 1 do |
| 3179 |
< |
begin |
| 3180 |
< |
cur_field := DataSource.DataSet.FindField(SQLParams[i].Name); |
| 3181 |
< |
cur_param := SQLParams[i]; |
| 3182 |
< |
if (cur_field <> nil) then begin |
| 3183 |
< |
if (cur_field.IsNull) then |
| 3184 |
< |
cur_param.IsNull := True |
| 3185 |
< |
else case cur_field.DataType of |
| 3186 |
< |
ftString: |
| 3187 |
< |
cur_param.AsString := cur_field.AsString; |
| 3188 |
< |
ftBoolean, ftSmallint, ftWord: |
| 3189 |
< |
cur_param.AsShort := cur_field.AsInteger; |
| 3190 |
< |
ftInteger: |
| 3191 |
< |
cur_param.AsLong := cur_field.AsInteger; |
| 3192 |
< |
ftLargeInt: |
| 3193 |
< |
cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt; |
| 3194 |
< |
ftFloat, ftCurrency: |
| 3195 |
< |
cur_param.AsDouble := cur_field.AsFloat; |
| 3196 |
< |
ftBCD: |
| 3197 |
< |
cur_param.AsCurrency := cur_field.AsCurrency; |
| 3198 |
< |
ftDate: |
| 3199 |
< |
cur_param.AsDate := cur_field.AsDateTime; |
| 3200 |
< |
ftTime: |
| 3201 |
< |
cur_param.AsTime := cur_field.AsDateTime; |
| 3202 |
< |
ftDateTime: |
| 3203 |
< |
cur_param.AsDateTime := cur_field.AsDateTime; |
| 3204 |
< |
ftBlob, ftMemo: |
| 3205 |
< |
begin |
| 3206 |
< |
s := nil; |
| 3207 |
< |
try |
| 3208 |
< |
s := DataSource.DataSet. |
| 3209 |
< |
CreateBlobStream(cur_field, bmRead); |
| 3210 |
< |
cur_param.LoadFromStream(s); |
| 3211 |
< |
finally |
| 3212 |
< |
s.free; |
| 3213 |
< |
end; |
| 3214 |
< |
end; |
| 3215 |
< |
else |
| 3216 |
< |
IBError(ibxeNotSupported, [nil]); |
| 3217 |
< |
end; |
| 3218 |
< |
end; |
| 3219 |
< |
end; |
| 3220 |
< |
end; |
| 3221 |
< |
end; |
| 3222 |
< |
|
| 3223 |
< |
procedure TIBCustomDataSet.ReQuery; |
| 3224 |
< |
begin |
| 3225 |
< |
FQSelect.Close; |
| 3226 |
< |
ClearBlobCache; |
| 3227 |
< |
FCurrentRecord := -1; |
| 3228 |
< |
FRecordCount := 0; |
| 3229 |
< |
FDeletedRecords := 0; |
| 3230 |
< |
FBPos := 0; |
| 3231 |
< |
FOBPos := 0; |
| 3232 |
< |
FBEnd := 0; |
| 3233 |
< |
FOBEnd := 0; |
| 3234 |
< |
FQSelect.Close; |
| 3235 |
< |
FQSelect.ExecQuery; |
| 3236 |
< |
FOpen := FQSelect.Open; |
| 3237 |
< |
First; |
| 3238 |
< |
end; |
| 3239 |
< |
|
| 3240 |
< |
procedure TIBCustomDataSet.InternalOpen; |
| 3241 |
< |
var |
| 3242 |
< |
SetCursor: Boolean; |
| 3243 |
< |
|
| 3244 |
< |
function RecordDataLength(n: Integer): Long; |
| 3245 |
< |
begin |
| 3246 |
< |
result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData)); |
| 3247 |
< |
end; |
| 3248 |
< |
|
| 3249 |
< |
begin |
| 3250 |
< |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 3251 |
< |
if SetCursor then |
| 3252 |
< |
Screen.Cursor := crHourGlass; |
| 3253 |
< |
try |
| 3254 |
< |
ActivateConnection; |
| 3255 |
< |
ActivateTransaction; |
| 3256 |
< |
if FQSelect.SQL.Text = '' then |
| 3257 |
< |
IBError(ibxeEmptyQuery, [nil]); |
| 3258 |
< |
if not FInternalPrepared then |
| 3259 |
< |
InternalPrepare; |
| 3260 |
< |
if FQSelect.SQLType = SQLSelect then |
| 3261 |
< |
begin |
| 3262 |
< |
if DefaultFields then |
| 3263 |
< |
CreateFields; |
| 3264 |
< |
BindFields(True); |
| 3265 |
< |
FCurrentRecord := -1; |
| 3266 |
< |
FQSelect.ExecQuery; |
| 3267 |
< |
FOpen := FQSelect.Open; |
| 3268 |
< |
|
| 3269 |
< |
{ Initialize offsets, buffer sizes, etc... |
| 3270 |
< |
1. Initially FRecordSize is just the "RecordDataLength". |
| 3271 |
< |
2. Allocate a "model" buffer and do a dummy fetch |
| 3272 |
< |
3. After the dummy fetch, FRecordSize will be appropriately |
| 3273 |
< |
adjusted to reflect the additional "weight" of the field |
| 3274 |
< |
data. |
| 3275 |
< |
4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize. |
| 3276 |
< |
5. Now, with the BufferSize available, allocate memory for chunks of records |
| 3277 |
< |
6. Re-allocate the model buffer, accounting for the new |
| 3278 |
< |
FRecordBufferSize. |
| 3279 |
< |
7. Finally, calls to AllocRecordBuffer will work!. |
| 3280 |
< |
} |
| 3281 |
< |
{Step 1} |
| 3282 |
< |
FRecordSize := RecordDataLength(FQSelect.Current.Count); |
| 3283 |
< |
{Step 2, 3} |
| 3284 |
< |
IBAlloc(FModelBuffer, 0, FRecordSize); |
| 3285 |
< |
FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer); |
| 3286 |
< |
{Step 4} |
| 3287 |
< |
FCalcFieldsOffset := FRecordSize; |
| 3288 |
< |
FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize; |
| 3289 |
< |
FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream))); |
| 3290 |
< |
{Step 5} |
| 3291 |
< |
if UniDirectional then |
| 3292 |
< |
FBufferChunkSize := FRecordBufferSize * UniCache |
| 3293 |
< |
else |
| 3294 |
< |
FBufferChunkSize := FRecordBufferSize * BufferChunks; |
| 3295 |
< |
IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize); |
| 3296 |
< |
if FCachedUpdates or (csReading in ComponentState) then |
| 3297 |
< |
IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize); |
| 3298 |
< |
FBPos := 0; |
| 3299 |
< |
FOBPos := 0; |
| 3300 |
< |
FBEnd := 0; |
| 3301 |
< |
FOBEnd := 0; |
| 3302 |
< |
FCacheSize := FBufferChunkSize; |
| 3303 |
< |
FOldCacheSize := FBufferChunkSize; |
| 3304 |
< |
{Step 6} |
| 3305 |
< |
IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count), |
| 3306 |
< |
FRecordBufferSize); |
| 3307 |
< |
{Step 7} |
| 3308 |
< |
FOldBuffer := AllocRecordBuffer; |
| 3309 |
< |
end |
| 3310 |
< |
else |
| 3311 |
< |
FQSelect.ExecQuery; |
| 3312 |
< |
finally |
| 3313 |
< |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 3314 |
< |
Screen.Cursor := crDefault; |
| 3315 |
< |
end; |
| 3316 |
< |
end; |
| 3317 |
< |
|
| 3318 |
< |
procedure TIBCustomDataSet.InternalPost; |
| 3319 |
< |
var |
| 3320 |
< |
Qry: TIBSQL; |
| 3321 |
< |
Buff: PChar; |
| 3322 |
< |
SetCursor: Boolean; |
| 3323 |
< |
bInserting: Boolean; |
| 3324 |
< |
begin |
| 3325 |
< |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 3326 |
< |
if SetCursor then |
| 3327 |
< |
Screen.Cursor := crHourGlass; |
| 3328 |
< |
try |
| 3329 |
< |
Buff := GetActiveBuf; |
| 3330 |
< |
CheckEditState; |
| 3331 |
< |
AdjustRecordOnInsert(Buff); |
| 3332 |
< |
if (State = dsInsert) then |
| 3333 |
< |
begin |
| 3334 |
< |
bInserting := True; |
| 3335 |
< |
Qry := FQInsert; |
| 3336 |
< |
PRecordData(Buff)^.rdUpdateStatus := usInserted; |
| 3337 |
< |
PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted; |
| 3338 |
< |
WriteRecordCache(FRecordCount, Buff); |
| 3339 |
< |
FCurrentRecord := FRecordCount; |
| 3340 |
< |
end |
| 3341 |
< |
else begin |
| 3342 |
< |
bInserting := False; |
| 3343 |
< |
Qry := FQModify; |
| 3344 |
< |
if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then |
| 3345 |
< |
begin |
| 3346 |
< |
PRecordData(Buff)^.rdUpdateStatus := usModified; |
| 3347 |
< |
PRecordData(Buff)^.rdCachedUpdateStatus := cusModified; |
| 3348 |
< |
end |
| 3349 |
< |
else if PRecordData(Buff)^. |
| 3350 |
< |
rdCachedUpdateStatus = cusUninserted then |
| 3351 |
< |
begin |
| 3352 |
< |
PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted; |
| 3353 |
< |
Dec(FDeletedRecords); |
| 3354 |
< |
end; |
| 3355 |
< |
end; |
| 3356 |
< |
if (not CachedUpdates) then |
| 3357 |
< |
InternalPostRecord(Qry, Buff) |
| 3358 |
< |
else begin |
| 3359 |
< |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 3360 |
< |
FUpdatesPending := True; |
| 3361 |
< |
end; |
| 3362 |
< |
if bInserting then |
| 3363 |
< |
Inc(FRecordCount); |
| 3364 |
< |
finally |
| 3365 |
< |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 3366 |
< |
Screen.Cursor := crDefault; |
| 3367 |
< |
end; |
| 3368 |
< |
end; |
| 3369 |
< |
|
| 3370 |
< |
procedure TIBCustomDataSet.InternalRefresh; |
| 3371 |
< |
begin |
| 3372 |
< |
inherited InternalRefresh; |
| 3373 |
< |
InternalRefreshRow; |
| 3374 |
< |
end; |
| 3375 |
< |
|
| 3376 |
< |
procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar); |
| 3377 |
< |
begin |
| 3378 |
< |
InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber)); |
| 3379 |
< |
end; |
| 3380 |
< |
|
| 3381 |
< |
function TIBCustomDataSet.IsCursorOpen: Boolean; |
| 3382 |
< |
begin |
| 3383 |
< |
result := FOpen; |
| 3384 |
< |
end; |
| 3385 |
< |
|
| 3386 |
< |
function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant; |
| 3387 |
< |
Options: TLocateOptions): Boolean; |
| 3388 |
< |
var |
| 3389 |
< |
{$IF FPC_FULLVERSION > 20600 } |
| 3390 |
< |
CurBookmark: TBookmark; |
| 3391 |
< |
{$ELSE} |
| 3392 |
< |
CurBookmark: string; |
| 3393 |
< |
{$ENDIF} |
| 3394 |
< |
begin |
| 3395 |
< |
DisableControls; |
| 3396 |
< |
try |
| 3397 |
< |
CurBookmark := Bookmark; |
| 3398 |
< |
First; |
| 3399 |
< |
result := InternalLocate(KeyFields, KeyValues, Options); |
| 3400 |
< |
if not result then |
| 3401 |
< |
Bookmark := CurBookmark; |
| 3402 |
< |
finally |
| 3403 |
< |
EnableControls; |
| 3404 |
< |
end; |
| 3405 |
< |
end; |
| 3406 |
< |
|
| 3407 |
< |
function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant; |
| 3408 |
< |
const ResultFields: string): Variant; |
| 3409 |
< |
var |
| 3410 |
< |
fl: TList; |
| 3411 |
< |
{$IF FPC_FULLVERSION > 20600 } |
| 3412 |
< |
CurBookmark: TBookmark; |
| 3413 |
< |
{$ELSE} |
| 3414 |
< |
CurBookmark: string; |
| 3415 |
< |
{$ENDIF} |
| 3416 |
< |
begin |
| 3417 |
< |
DisableControls; |
| 3418 |
< |
fl := TList.Create; |
| 3419 |
< |
CurBookmark := Bookmark; |
| 3420 |
< |
try |
| 3421 |
< |
First; |
| 3422 |
< |
if InternalLocate(KeyFields, KeyValues, []) then |
| 3423 |
< |
begin |
| 3424 |
< |
if (ResultFields <> '') then |
| 3425 |
< |
result := FieldValues[ResultFields] |
| 3426 |
< |
else |
| 3427 |
< |
result := NULL; |
| 3428 |
< |
end |
| 3429 |
< |
else |
| 3430 |
< |
result := Null; |
| 3431 |
< |
finally |
| 3432 |
< |
Bookmark := CurBookmark; |
| 3433 |
< |
fl.Free; |
| 3434 |
< |
EnableControls; |
| 3435 |
< |
end; |
| 3436 |
< |
end; |
| 3437 |
< |
|
| 3438 |
< |
procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer); |
| 3439 |
< |
begin |
| 3440 |
< |
PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^; |
| 3441 |
< |
end; |
| 3442 |
< |
|
| 3443 |
< |
procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); |
| 3444 |
< |
begin |
| 3445 |
< |
PRecordData(Buffer)^.rdBookmarkFlag := Value; |
| 3446 |
< |
end; |
| 3447 |
< |
|
| 3448 |
< |
procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean); |
| 3449 |
< |
begin |
| 3450 |
< |
if not Value and FCachedUpdates then |
| 3451 |
< |
CancelUpdates; |
| 3452 |
< |
if (not (csReading in ComponentState)) and Value then |
| 3453 |
< |
CheckDatasetClosed; |
| 3454 |
< |
FCachedUpdates := Value; |
| 3455 |
< |
end; |
| 3456 |
< |
|
| 3457 |
< |
procedure TIBCustomDataSet.SetDataSource(Value: TDataSource); |
| 3458 |
< |
begin |
| 3459 |
< |
if IsLinkedTo(Value) then |
| 3460 |
< |
IBError(ibxeCircularReference, [nil]); |
| 3461 |
< |
if FDataLink <> nil then |
| 3462 |
< |
FDataLink.DataSource := Value; |
| 3463 |
< |
end; |
| 3464 |
< |
|
| 3465 |
< |
procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer); |
| 3466 |
< |
var |
| 3467 |
< |
Buff, TmpBuff: PChar; |
| 3468 |
< |
begin |
| 3469 |
< |
Buff := GetActiveBuf; |
| 3470 |
< |
if Field.FieldNo < 0 then |
| 3471 |
< |
begin |
| 3472 |
< |
TmpBuff := Buff + FRecordSize + Field.Offset; |
| 3473 |
< |
Boolean(TmpBuff[0]) := LongBool(Buffer); |
| 3474 |
< |
if Boolean(TmpBuff[0]) then |
| 3475 |
< |
Move(Buffer^, TmpBuff[1], Field.DataSize); |
| 3476 |
< |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 3477 |
< |
end |
| 3478 |
< |
else begin |
| 3479 |
< |
CheckEditState; |
| 3480 |
< |
with PRecordData(Buff)^ do |
| 3481 |
< |
begin |
| 3482 |
< |
{ If inserting, Adjust record position } |
| 3483 |
< |
AdjustRecordOnInsert(Buff); |
| 3484 |
< |
if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and |
| 3485 |
< |
(FMappedFieldPosition[Field.FieldNo - 1] <= rdFieldCount) then |
| 3486 |
< |
begin |
| 3487 |
< |
Field.Validate(Buffer); |
| 3488 |
< |
if (Buffer = nil) or |
| 3489 |
< |
(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then |
| 3490 |
< |
rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull := True |
| 3491 |
< |
else begin |
| 3492 |
< |
Move(Buffer^, Buff[rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs], |
| 3493 |
< |
rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataSize); |
| 3494 |
< |
if (rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataType = SQL_TEXT) or |
| 3495 |
< |
(rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataType = SQL_VARYING) then |
| 3496 |
< |
rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataLength := StrLen(PChar(Buffer)); |
| 3497 |
< |
rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull := False; |
| 3498 |
< |
if rdUpdateStatus = usUnmodified then |
| 3499 |
< |
begin |
| 3500 |
< |
if CachedUpdates then |
| 3501 |
< |
begin |
| 3502 |
< |
FUpdatesPending := True; |
| 3503 |
< |
if State = dsInsert then |
| 3504 |
< |
rdCachedUpdateStatus := cusInserted |
| 3505 |
< |
else if State = dsEdit then |
| 3506 |
< |
rdCachedUpdateStatus := cusModified; |
| 3507 |
< |
end; |
| 3508 |
< |
|
| 3509 |
< |
if State = dsInsert then |
| 3510 |
< |
rdUpdateStatus := usInserted |
| 3511 |
< |
else |
| 3512 |
< |
rdUpdateStatus := usModified; |
| 3513 |
< |
end; |
| 3514 |
< |
WriteRecordCache(rdRecordNumber, Buff); |
| 3515 |
< |
SetModified(True); |
| 3516 |
< |
end; |
| 3517 |
< |
end; |
| 3518 |
< |
end; |
| 3519 |
< |
end; |
| 3520 |
< |
if not (State in [dsCalcFields, dsFilter, dsNewValue]) then |
| 3521 |
< |
DataEvent(deFieldChange, PtrInt(Field)); |
| 3522 |
< |
end; |
| 3523 |
< |
|
| 3524 |
< |
procedure TIBCustomDataSet.SetRecNo(Value: Integer); |
| 3525 |
< |
begin |
| 3526 |
< |
CheckBrowseMode; |
| 3527 |
< |
if (Value < 1) then |
| 3528 |
< |
Value := 1 |
| 3529 |
< |
else if Value > FRecordCount then |
| 3530 |
< |
begin |
| 3531 |
< |
InternalLast; |
| 3532 |
< |
Value := Min(FRecordCount, Value); |
| 3533 |
< |
end; |
| 3534 |
< |
if (Value <> RecNo) then |
| 3535 |
< |
begin |
| 3536 |
< |
DoBeforeScroll; |
| 3537 |
< |
FCurrentRecord := Value - 1; |
| 3538 |
< |
Resync([]); |
| 3539 |
< |
DoAfterScroll; |
| 3540 |
< |
end; |
| 3541 |
< |
end; |
| 3542 |
< |
|
| 3543 |
< |
procedure TIBCustomDataSet.Disconnect; |
| 3544 |
< |
begin |
| 3545 |
< |
Close; |
| 3546 |
< |
InternalUnPrepare; |
| 3547 |
< |
end; |
| 3548 |
< |
|
| 3549 |
< |
procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode); |
| 3550 |
< |
begin |
| 3551 |
< |
if not CanModify then |
| 3552 |
< |
IBError(ibxeCannotUpdate, [nil]) |
| 3553 |
< |
else |
| 3554 |
< |
FUpdateMode := Value; |
| 3555 |
< |
end; |
| 3556 |
< |
|
| 3557 |
< |
|
| 3558 |
< |
procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject); |
| 3559 |
< |
begin |
| 3560 |
< |
if Value <> FUpdateObject then |
| 3561 |
< |
begin |
| 3562 |
< |
if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then |
| 3563 |
< |
FUpdateObject.DataSet := nil; |
| 3564 |
< |
FUpdateObject := Value; |
| 3565 |
< |
if Assigned(FUpdateObject) then |
| 3566 |
< |
begin |
| 3567 |
< |
if Assigned(FUpdateObject.DataSet) and |
| 3568 |
< |
(FUpdateObject.DataSet <> Self) then |
| 3569 |
< |
FUpdateObject.DataSet.UpdateObject := nil; |
| 3570 |
< |
FUpdateObject.DataSet := Self; |
| 3571 |
< |
end; |
| 3572 |
< |
end; |
| 3573 |
< |
end; |
| 3574 |
< |
|
| 3575 |
< |
function TIBCustomDataSet.ConstraintsStored: Boolean; |
| 3576 |
< |
begin |
| 3577 |
< |
Result := Constraints.Count > 0; |
| 3578 |
< |
end; |
| 3579 |
< |
|
| 3580 |
< |
procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar); |
| 3581 |
< |
begin |
| 3582 |
< |
FillChar(Buffer[FRecordSize], CalcFieldsSize, 0); |
| 3583 |
< |
end; |
| 3584 |
< |
|
| 3585 |
< |
|
| 3586 |
< |
procedure TIBCustomDataSet.InternalUnPrepare; |
| 3587 |
< |
begin |
| 3588 |
< |
if FInternalPrepared then |
| 3589 |
< |
begin |
| 3590 |
< |
CheckDatasetClosed; |
| 3591 |
< |
FieldDefs.Clear; |
| 3592 |
< |
FInternalPrepared := False; |
| 3593 |
< |
end; |
| 3594 |
< |
end; |
| 3595 |
< |
|
| 3596 |
< |
procedure TIBCustomDataSet.InternalExecQuery; |
| 3597 |
< |
var |
| 3598 |
< |
DidActivate: Boolean; |
| 3599 |
< |
SetCursor: Boolean; |
| 3600 |
< |
begin |
| 3601 |
< |
DidActivate := False; |
| 3602 |
< |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 3603 |
< |
if SetCursor then |
| 3604 |
< |
Screen.Cursor := crHourGlass; |
| 3605 |
< |
try |
| 3606 |
< |
ActivateConnection; |
| 3607 |
< |
DidActivate := ActivateTransaction; |
| 3608 |
< |
if FQSelect.SQL.Text = '' then |
| 3609 |
< |
IBError(ibxeEmptyQuery, [nil]); |
| 3610 |
< |
if not FInternalPrepared then |
| 3611 |
< |
InternalPrepare; |
| 3612 |
< |
if FQSelect.SQLType = SQLSelect then |
| 3613 |
< |
begin |
| 3614 |
< |
IBError(ibxeIsASelectStatement, [nil]); |
| 3615 |
< |
end |
| 3616 |
< |
else |
| 3617 |
< |
FQSelect.ExecQuery; |
| 3618 |
< |
finally |
| 3619 |
< |
if DidActivate then |
| 3620 |
< |
DeactivateTransaction; |
| 3621 |
< |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 3622 |
< |
Screen.Cursor := crDefault; |
| 3623 |
< |
end; |
| 3624 |
< |
end; |
| 3625 |
< |
|
| 3626 |
< |
function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE; |
| 3627 |
< |
begin |
| 3628 |
< |
Result := FQSelect.Handle; |
| 3629 |
< |
end; |
| 3630 |
< |
|
| 3631 |
< |
procedure TIBCustomDataSet.InitRecord(Buffer: PChar); |
| 3632 |
< |
begin |
| 3633 |
< |
inherited InitRecord(Buffer); |
| 3634 |
< |
with PRecordData(Buffer)^ do |
| 3635 |
< |
begin |
| 3636 |
< |
rdUpdateStatus := TUpdateStatus(usInserted); |
| 3637 |
< |
rdBookMarkFlag := bfInserted; |
| 3638 |
< |
rdRecordNumber := -1; |
| 3639 |
< |
end; |
| 3640 |
< |
end; |
| 3641 |
< |
|
| 3642 |
< |
procedure TIBCustomDataSet.InternalInsert; |
| 3643 |
< |
begin |
| 3644 |
< |
CursorPosChanged; |
| 3645 |
< |
end; |
| 3646 |
< |
|
| 3647 |
< |
{ TIBDataSet IProviderSupport } |
| 3648 |
< |
|
| 3649 |
< |
(*procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean); |
| 3650 |
< |
begin |
| 3651 |
< |
if Commit then |
| 3652 |
< |
Transaction.Commit else |
| 3653 |
< |
Transaction.Rollback; |
| 3654 |
< |
end; |
| 3655 |
< |
|
| 3656 |
< |
function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams; |
| 3657 |
< |
ResultSet: Pointer = nil): Integer; |
| 3658 |
< |
var |
| 3659 |
< |
FQuery: TIBQuery; |
| 3660 |
< |
begin |
| 3661 |
< |
if Assigned(ResultSet) then |
| 3662 |
< |
begin |
| 3663 |
< |
TDataSet(ResultSet^) := TIBQuery.Create(nil); |
| 3664 |
< |
with TIBQuery(ResultSet^) do |
| 3665 |
< |
begin |
| 3666 |
< |
SQL.Text := ASQL; |
| 3667 |
< |
Params.Assign(AParams); |
| 3668 |
< |
Open; |
| 3669 |
< |
Result := RowsAffected; |
| 3670 |
< |
end; |
| 3671 |
< |
end |
| 3672 |
< |
else |
| 3673 |
< |
begin |
| 3674 |
< |
FQuery := TIBQuery.Create(nil); |
| 3675 |
< |
try |
| 3676 |
< |
FQuery.Database := Database; |
| 3677 |
< |
FQuery.Transaction := Transaction; |
| 3678 |
< |
FQuery.GenerateParamNames := True; |
| 3679 |
< |
FQuery.SQL.Text := ASQL; |
| 3680 |
< |
FQuery.Params.Assign(AParams); |
| 3681 |
< |
FQuery.ExecSQL; |
| 3682 |
< |
Result := FQuery.RowsAffected; |
| 3683 |
< |
finally |
| 3684 |
< |
FQuery.Free; |
| 3685 |
< |
end; |
| 3686 |
< |
end; |
| 3687 |
< |
end; |
| 3688 |
< |
|
| 3689 |
< |
function TIBCustomDataSet.PSGetQuoteChar: string; |
| 3690 |
< |
begin |
| 3691 |
< |
if Database.SQLDialect = 3 then |
| 3692 |
< |
Result := '"' else |
| 3693 |
< |
Result := ''; |
| 3694 |
< |
end; |
| 3695 |
< |
|
| 3696 |
< |
function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; |
| 3697 |
< |
var |
| 3698 |
< |
PrevErr: Integer; |
| 3699 |
< |
begin |
| 3700 |
< |
if Prev <> nil then |
| 3701 |
< |
PrevErr := Prev.ErrorCode else |
| 3702 |
< |
PrevErr := 0; |
| 3703 |
< |
if E is EIBError then |
| 3704 |
< |
with EIBError(E) do |
| 3705 |
< |
Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else |
| 3706 |
< |
Result := inherited PSGetUpdateException(E, Prev); |
| 3707 |
< |
end; |
| 3708 |
< |
|
| 3709 |
< |
function TIBCustomDataSet.PSInTransaction: Boolean; |
| 3710 |
< |
begin |
| 3711 |
< |
Result := Transaction.InTransaction; |
| 3712 |
< |
end; |
| 3713 |
< |
|
| 3714 |
< |
function TIBCustomDataSet.PSIsSQLBased: Boolean; |
| 3715 |
< |
begin |
| 3716 |
< |
Result := True; |
| 3717 |
< |
end; |
| 3718 |
< |
|
| 3719 |
< |
function TIBCustomDataSet.PSIsSQLSupported: Boolean; |
| 3720 |
< |
begin |
| 3721 |
< |
Result := True; |
| 3722 |
< |
end; |
| 3723 |
< |
|
| 3724 |
< |
procedure TIBCustomDataSet.PSReset; |
| 3725 |
< |
begin |
| 3726 |
< |
inherited PSReset; |
| 3727 |
< |
if Active then |
| 3728 |
< |
begin |
| 3729 |
< |
Close; |
| 3730 |
< |
Open; |
| 3731 |
< |
end; |
| 3732 |
< |
end; |
| 3733 |
< |
|
| 3734 |
< |
function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; |
| 3735 |
< |
var |
| 3736 |
< |
UpdateAction: TIBUpdateAction; |
| 3737 |
< |
SQL: string; |
| 3738 |
< |
Params: TParams; |
| 3739 |
< |
|
| 3740 |
< |
procedure AssignParams(DataSet: TDataSet; Params: TParams); |
| 3741 |
< |
var |
| 3742 |
< |
I: Integer; |
| 3743 |
< |
Old: Boolean; |
| 3744 |
< |
Param: TParam; |
| 3745 |
< |
PName: string; |
| 3746 |
< |
Field: TField; |
| 3747 |
< |
Value: Variant; |
| 3748 |
< |
begin |
| 3749 |
< |
for I := 0 to Params.Count - 1 do |
| 3750 |
< |
begin |
| 3751 |
< |
Param := Params[I]; |
| 3752 |
< |
PName := Param.Name; |
| 3753 |
< |
Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize} |
| 3754 |
< |
if Old then System.Delete(PName, 1, 4); |
| 3755 |
< |
Field := DataSet.FindField(PName); |
| 3756 |
< |
if not Assigned(Field) then Continue; |
| 3757 |
< |
if Old then Param.AssignFieldValue(Field, Field.OldValue) else |
| 3758 |
< |
begin |
| 3759 |
< |
Value := Field.NewValue; |
| 3760 |
< |
if VarIsEmpty(Value) then Value := Field.OldValue; |
| 3761 |
< |
Param.AssignFieldValue(Field, Value); |
| 3762 |
< |
end; |
| 3763 |
< |
end; |
| 3764 |
< |
end; |
| 3765 |
< |
|
| 3766 |
< |
begin |
| 3767 |
< |
Result := False; |
| 3768 |
< |
if Assigned(OnUpdateRecord) then |
| 3769 |
< |
begin |
| 3770 |
< |
UpdateAction := uaFail; |
| 3771 |
< |
if Assigned(FOnUpdateRecord) then |
| 3772 |
< |
begin |
| 3773 |
< |
FOnUpdateRecord(Delta, UpdateKind, UpdateAction); |
| 3774 |
< |
Result := UpdateAction = uaApplied; |
| 3775 |
< |
end; |
| 3776 |
< |
end |
| 3777 |
< |
else if Assigned(FUpdateObject) then |
| 3778 |
< |
begin |
| 3779 |
< |
SQL := FUpdateObject.GetSQL(UpdateKind).Text; |
| 3780 |
< |
if SQL <> '' then |
| 3781 |
< |
begin |
| 3782 |
< |
Params := TParams.Create; |
| 3783 |
< |
try |
| 3784 |
< |
Params.ParseSQL(SQL, True); |
| 3785 |
< |
AssignParams(Delta, Params); |
| 3786 |
< |
if PSExecuteStatement(SQL, Params) = 0 then |
| 3787 |
< |
IBError(ibxeNoRecordsAffected, [nil]); |
| 3788 |
< |
Result := True; |
| 3789 |
< |
finally |
| 3790 |
< |
Params.Free; |
| 3791 |
< |
end; |
| 3792 |
< |
end; |
| 3793 |
< |
end; |
| 3794 |
< |
end; |
| 3795 |
< |
|
| 3796 |
< |
procedure TIBCustomDataSet.PSStartTransaction; |
| 3797 |
< |
begin |
| 3798 |
< |
ActivateConnection; |
| 3799 |
< |
Transaction.StartTransaction; |
| 3800 |
< |
end; |
| 3801 |
< |
|
| 3802 |
< |
function TIBCustomDataSet.PSGetTableName: string; |
| 3803 |
< |
begin |
| 3804 |
< |
// if not FInternalPrepared then |
| 3805 |
< |
// InternalPrepare; |
| 3806 |
< |
{ It is possible for the FQSelectSQL to be unprepared |
| 3807 |
< |
with FInternalPreprepared being true (see DoBeforeTransactionEnd). |
| 3808 |
< |
So check the Prepared of the SelectSQL instead } |
| 3809 |
< |
if not FQSelect.Prepared then |
| 3810 |
< |
FQSelect.Prepare; |
| 3811 |
< |
Result := FQSelect.UniqueRelationName; |
| 3812 |
< |
end;*) |
| 3813 |
< |
|
| 3814 |
< |
procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput); |
| 3815 |
< |
begin |
| 3816 |
< |
InternalBatchInput(InputObject); |
| 3817 |
< |
end; |
| 3818 |
< |
|
| 3819 |
< |
procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput); |
| 3820 |
< |
begin |
| 3821 |
< |
InternalBatchOutput(OutputObject); |
| 3822 |
< |
end; |
| 3823 |
< |
|
| 3824 |
< |
procedure TIBDataSet.ExecSQL; |
| 3825 |
< |
begin |
| 3826 |
< |
InternalExecQuery; |
| 3827 |
< |
end; |
| 3828 |
< |
|
| 3829 |
< |
procedure TIBDataSet.Prepare; |
| 3830 |
< |
begin |
| 3831 |
< |
InternalPrepare; |
| 3832 |
< |
end; |
| 3833 |
< |
|
| 3834 |
< |
procedure TIBDataSet.UnPrepare; |
| 3835 |
< |
begin |
| 3836 |
< |
InternalUnPrepare; |
| 3837 |
< |
end; |
| 3838 |
< |
|
| 3839 |
< |
function TIBDataSet.GetPrepared: Boolean; |
| 3840 |
< |
begin |
| 3841 |
< |
Result := InternalPrepared; |
| 3842 |
< |
end; |
| 3843 |
< |
|
| 3844 |
< |
procedure TIBDataSet.InternalOpen; |
| 3845 |
< |
begin |
| 3846 |
< |
ActivateConnection; |
| 3847 |
< |
ActivateTransaction; |
| 3848 |
< |
InternalSetParamsFromCursor; |
| 3849 |
< |
Inherited InternalOpen; |
| 3850 |
< |
end; |
| 3851 |
< |
|
| 3852 |
< |
procedure TIBDataSet.SetFiltered(Value: Boolean); |
| 3853 |
< |
begin |
| 3854 |
< |
if(Filtered <> Value) then |
| 3855 |
< |
begin |
| 3856 |
< |
inherited SetFiltered(value); |
| 3857 |
< |
if Active then |
| 3858 |
< |
begin |
| 3859 |
< |
Close; |
| 3860 |
< |
Open; |
| 3861 |
< |
end; |
| 3862 |
< |
end |
| 3863 |
< |
else |
| 3864 |
< |
inherited SetFiltered(value); |
| 3865 |
< |
end; |
| 3866 |
< |
|
| 3867 |
< |
function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean; |
| 3868 |
< |
begin |
| 3869 |
< |
Result := false; |
| 3870 |
< |
if not Assigned(Bookmark) then |
| 3871 |
< |
exit; |
| 3872 |
< |
Result := PInteger(Bookmark)^ < FRecordCount; |
| 3873 |
< |
end; |
| 3874 |
< |
|
| 3875 |
< |
function TIBCustomDataSet.GetFieldData(Field: TField; |
| 3876 |
< |
Buffer: Pointer): Boolean; |
| 3877 |
< |
{$IFDEF TBCDFIELD_IS_BCD} |
| 3878 |
< |
var |
| 3879 |
< |
lTempCurr : System.Currency; |
| 3880 |
< |
begin |
| 3881 |
< |
if (Field.DataType = ftBCD) and (Buffer <> nil) then |
| 3882 |
< |
begin |
| 3883 |
< |
Result := InternalGetFieldData(Field, @lTempCurr); |
| 3884 |
< |
if Result then |
| 3885 |
< |
CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size); |
| 3886 |
< |
end |
| 3887 |
< |
else |
| 3888 |
< |
{$ELSE} |
| 3889 |
< |
begin |
| 3890 |
< |
{$ENDIF} |
| 3891 |
< |
Result := InternalGetFieldData(Field, Buffer); |
| 3892 |
< |
end; |
| 3893 |
< |
|
| 3894 |
< |
function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer; |
| 3895 |
< |
NativeFormat: Boolean): Boolean; |
| 3896 |
< |
begin |
| 3897 |
< |
if (Field.DataType = ftBCD) and not NativeFormat then |
| 3898 |
< |
Result := InternalGetFieldData(Field, Buffer) |
| 3899 |
< |
else |
| 3900 |
< |
Result := inherited GetFieldData(Field, Buffer, NativeFormat); |
| 3901 |
< |
end; |
| 3902 |
< |
|
| 3903 |
< |
procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer); |
| 3904 |
< |
{$IFDEF TDBDFIELD_IS_BCD} |
| 3905 |
< |
var |
| 3906 |
< |
lTempCurr : System.Currency; |
| 3907 |
< |
begin |
| 3908 |
< |
if (Field.DataType = ftBCD) and (Buffer <> nil) then |
| 3909 |
< |
begin |
| 3910 |
< |
BCDToCurr(TBCD(Buffer^), lTempCurr); |
| 3911 |
< |
InternalSetFieldData(Field, @lTempCurr); |
| 3912 |
< |
end |
| 3913 |
< |
else |
| 3914 |
< |
{$ELSE} |
| 3915 |
< |
begin |
| 3916 |
< |
{$ENDIF} |
| 3917 |
< |
InternalSetFieldData(Field, Buffer); |
| 3918 |
< |
end; |
| 3919 |
< |
|
| 3920 |
< |
procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer; |
| 3921 |
< |
NativeFormat: Boolean); |
| 3922 |
< |
begin |
| 3923 |
< |
if (not NativeFormat) and (Field.DataType = ftBCD) then |
| 3924 |
< |
InternalSetfieldData(Field, Buffer) |
| 3925 |
< |
else |
| 3926 |
< |
inherited SetFieldData(Field, buffer, NativeFormat); |
| 3927 |
< |
end; |
| 3928 |
< |
|
| 3929 |
< |
{ TIBDataSetUpdateObject } |
| 3930 |
< |
|
| 3931 |
< |
constructor TIBDataSetUpdateObject.Create(AOwner: TComponent); |
| 3932 |
< |
begin |
| 3933 |
< |
inherited Create(AOwner); |
| 3934 |
< |
FRefreshSQL := TStringList.Create; |
| 3935 |
< |
end; |
| 3936 |
< |
|
| 3937 |
< |
destructor TIBDataSetUpdateObject.Destroy; |
| 3938 |
< |
begin |
| 3939 |
< |
FRefreshSQL.Free; |
| 3940 |
< |
inherited Destroy; |
| 3941 |
< |
end; |
| 3942 |
< |
|
| 3943 |
< |
procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings); |
| 3944 |
< |
begin |
| 3945 |
< |
FRefreshSQL.Assign(Value); |
| 3946 |
< |
end; |
| 3947 |
< |
|
| 3948 |
< |
procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar); |
| 3949 |
< |
begin |
| 3950 |
< |
if not Assigned(DataSet) then Exit; |
| 3951 |
< |
DataSet.SetInternalSQLParams(Query, buff); |
| 3952 |
< |
end; |
| 3953 |
< |
|
| 3954 |
< |
{ TIBDSBlobStream } |
| 3955 |
< |
constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream; |
| 3956 |
< |
Mode: TBlobStreamMode); |
| 3957 |
< |
begin |
| 3958 |
< |
FField := AField; |
| 3959 |
< |
FBlobStream := ABlobStream; |
| 3960 |
< |
FBlobStream.Seek(0, soFromBeginning); |
| 3961 |
< |
if (Mode = bmWrite) then |
| 3962 |
< |
FBlobStream.Truncate; |
| 3963 |
< |
end; |
| 3964 |
< |
|
| 3965 |
< |
function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint; |
| 3966 |
< |
begin |
| 3967 |
< |
result := FBlobStream.Read(Buffer, Count); |
| 3968 |
< |
end; |
| 3969 |
< |
|
| 3970 |
< |
function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint; |
| 3971 |
< |
begin |
| 3972 |
< |
result := FBlobStream.Seek(Offset, Origin); |
| 3973 |
< |
end; |
| 3974 |
< |
|
| 3975 |
< |
procedure TIBDSBlobStream.SetSize(NewSize: Longint); |
| 3976 |
< |
begin |
| 3977 |
< |
FBlobStream.SetSize(NewSize); |
| 3978 |
< |
end; |
| 3979 |
< |
|
| 3980 |
< |
function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint; |
| 3981 |
< |
begin |
| 3982 |
< |
if not (FField.DataSet.State in [dsEdit, dsInsert]) then |
| 3983 |
< |
IBError(ibxeNotEditing, [nil]); |
| 3984 |
< |
TIBCustomDataSet(FField.DataSet).RecordModified(True); |
| 3985 |
< |
TBlobField(FField).Modified := true; |
| 3986 |
< |
result := FBlobStream.Write(Buffer, Count); |
| 3987 |
< |
TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField)); |
| 3988 |
< |
end; |
| 3989 |
< |
|
| 3990 |
< |
{ TIBGenerator } |
| 3991 |
< |
|
| 3992 |
< |
procedure TIBGenerator.SetIncrement(const AValue: integer); |
| 3993 |
< |
begin |
| 3994 |
< |
if AValue < 0 then |
| 3995 |
< |
raise Exception.Create('A Generator Increment cannot be negative'); |
| 3996 |
< |
FIncrement := AValue |
| 3997 |
< |
end; |
| 3998 |
< |
|
| 3999 |
< |
function TIBGenerator.GetNextValue(ADatabase: TIBDatabase; |
| 4000 |
< |
ATransaction: TIBTransaction): integer; |
| 4001 |
< |
begin |
| 4002 |
< |
with TIBSQL.Create(nil) do |
| 4003 |
< |
try |
| 4004 |
< |
Database := ADatabase; |
| 4005 |
< |
Transaction := ATransaction; |
| 4006 |
< |
if not assigned(Database) then |
| 4007 |
< |
IBError(ibxeCannotSetDatabase,[]); |
| 4008 |
< |
if not assigned(Transaction) then |
| 4009 |
< |
IBError(ibxeCannotSetTransaction,[]); |
| 4010 |
< |
with Transaction do |
| 4011 |
< |
if not InTransaction then StartTransaction; |
| 4012 |
< |
SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]); |
| 4013 |
< |
Prepare; |
| 4014 |
< |
ExecQuery; |
| 4015 |
< |
try |
| 4016 |
< |
Result := FieldByName('ID').AsInteger |
| 4017 |
< |
finally |
| 4018 |
< |
Close |
| 4019 |
< |
end; |
| 4020 |
< |
finally |
| 4021 |
< |
Free |
| 4022 |
< |
end; |
| 4023 |
< |
end; |
| 4024 |
< |
|
| 4025 |
< |
constructor TIBGenerator.Create(Owner: TIBCustomDataSet); |
| 4026 |
< |
begin |
| 4027 |
< |
FOwner := Owner; |
| 4028 |
< |
FIncrement := 1; |
| 4029 |
< |
end; |
| 4030 |
< |
|
| 4031 |
< |
|
| 4032 |
< |
procedure TIBGenerator.Apply; |
| 4033 |
< |
begin |
| 4034 |
< |
if (FGeneratorName <> '') and (FFieldName <> '') then |
| 4035 |
< |
Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction); |
| 4036 |
< |
end; |
| 4037 |
< |
|
| 4038 |
< |
end. |
| 1 |
> |
{************************************************************************} |
| 2 |
> |
{ } |
| 3 |
> |
{ Borland Delphi Visual Component Library } |
| 4 |
> |
{ InterBase Express core components } |
| 5 |
> |
{ } |
| 6 |
> |
{ Copyright (c) 1998-2000 Inprise Corporation } |
| 7 |
> |
{ } |
| 8 |
> |
{ InterBase Express is based in part on the product } |
| 9 |
> |
{ Free IB Components, written by Gregory H. Deatz for } |
| 10 |
> |
{ Hoagland, Longo, Moran, Dunst & Doukas Company. } |
| 11 |
> |
{ Free IB Components is used under license. } |
| 12 |
> |
{ } |
| 13 |
> |
{ The contents of this file are subject to the InterBase } |
| 14 |
> |
{ Public License Version 1.0 (the "License"); you may not } |
| 15 |
> |
{ use this file except in compliance with the License. You } |
| 16 |
> |
{ may obtain a copy of the License at http://www.Inprise.com/IPL.html } |
| 17 |
> |
{ Software distributed under the License is distributed on } |
| 18 |
> |
{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either } |
| 19 |
> |
{ express or implied. See the License for the specific language } |
| 20 |
> |
{ governing rights and limitations under the License. } |
| 21 |
> |
{ The Original Code was created by InterBase Software Corporation } |
| 22 |
> |
{ and its successors. } |
| 23 |
> |
{ Portions created by Inprise Corporation are Copyright (C) Inprise } |
| 24 |
> |
{ Corporation. All Rights Reserved. } |
| 25 |
> |
{ Contributor(s): Jeff Overcash } |
| 26 |
> |
{ } |
| 27 |
> |
{ IBX For Lazarus (Firebird Express) } |
| 28 |
> |
{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk } |
| 29 |
> |
{ Portions created by MWA Software are copyright McCallum Whyman } |
| 30 |
> |
{ Associates Ltd 2011 } |
| 31 |
> |
{ } |
| 32 |
> |
{************************************************************************} |
| 33 |
> |
|
| 34 |
> |
unit IBCustomDataSet; |
| 35 |
> |
|
| 36 |
> |
{$Mode Delphi} |
| 37 |
> |
|
| 38 |
> |
{$IFDEF DELPHI} |
| 39 |
> |
{$DEFINE TDBDFIELD_IS_BCD} |
| 40 |
> |
{$ENDIF} |
| 41 |
> |
|
| 42 |
> |
interface |
| 43 |
> |
|
| 44 |
> |
uses |
| 45 |
> |
{$IFDEF WINDOWS } |
| 46 |
> |
Windows, |
| 47 |
> |
{$ELSE} |
| 48 |
> |
unix, |
| 49 |
> |
{$ENDIF} |
| 50 |
> |
SysUtils, Classes, Forms, Controls, IBDatabase, |
| 51 |
> |
IBExternals, IB, IBHeader, IBSQL, Db, |
| 52 |
> |
IBUtils, IBBlob; |
| 53 |
> |
|
| 54 |
> |
const |
| 55 |
> |
BufferCacheSize = 1000; { Allocate cache in this many record chunks} |
| 56 |
> |
UniCache = 2; { Uni-directional cache is 2 records big } |
| 57 |
> |
|
| 58 |
> |
type |
| 59 |
> |
TIBCustomDataSet = class; |
| 60 |
> |
TIBDataSet = class; |
| 61 |
> |
|
| 62 |
> |
{ TIBDataSetUpdateObject } |
| 63 |
> |
|
| 64 |
> |
TIBDataSetUpdateObject = class(TComponent) |
| 65 |
> |
private |
| 66 |
> |
FRefreshSQL: TStrings; |
| 67 |
> |
procedure SetRefreshSQL(value: TStrings); |
| 68 |
> |
protected |
| 69 |
> |
function GetDataSet: TIBCustomDataSet; virtual; abstract; |
| 70 |
> |
procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract; |
| 71 |
> |
procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract; |
| 72 |
> |
function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract; |
| 73 |
> |
procedure InternalSetParams(Query: TIBSQL; buff: PChar); |
| 74 |
> |
property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet; |
| 75 |
> |
public |
| 76 |
> |
constructor Create(AOwner: TComponent); override; |
| 77 |
> |
destructor Destroy; override; |
| 78 |
> |
published |
| 79 |
> |
property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL; |
| 80 |
> |
end; |
| 81 |
> |
|
| 82 |
> |
TBlobDataArray = array[0..0] of TIBBlobStream; |
| 83 |
> |
PBlobDataArray = ^TBlobDataArray; |
| 84 |
> |
|
| 85 |
> |
{ TIBCustomDataSet } |
| 86 |
> |
TFieldData = record |
| 87 |
> |
fdDataType: Short; |
| 88 |
> |
fdDataScale: Short; |
| 89 |
> |
fdNullable: Boolean; |
| 90 |
> |
fdIsNull: Boolean; |
| 91 |
> |
fdDataSize: Short; |
| 92 |
> |
fdDataLength: Short; |
| 93 |
> |
fdDataOfs: Integer; |
| 94 |
> |
end; |
| 95 |
> |
PFieldData = ^TFieldData; |
| 96 |
> |
|
| 97 |
> |
TCachedUpdateStatus = ( |
| 98 |
> |
cusUnmodified, cusModified, cusInserted, |
| 99 |
> |
cusDeleted, cusUninserted |
| 100 |
> |
); |
| 101 |
> |
TIBDBKey = record |
| 102 |
> |
DBKey: array[0..7] of Byte; |
| 103 |
> |
end; |
| 104 |
> |
PIBDBKey = ^TIBDBKey; |
| 105 |
> |
|
| 106 |
> |
TRecordData = record |
| 107 |
> |
rdBookmarkFlag: TBookmarkFlag; |
| 108 |
> |
rdFieldCount: Short; |
| 109 |
> |
rdRecordNumber: Integer; |
| 110 |
> |
rdCachedUpdateStatus: TCachedUpdateStatus; |
| 111 |
> |
rdUpdateStatus: TUpdateStatus; |
| 112 |
> |
rdSavedOffset: DWORD; |
| 113 |
> |
rdDBKey: TIBDBKey; |
| 114 |
> |
rdFields: array[1..1] of TFieldData; |
| 115 |
> |
end; |
| 116 |
> |
PRecordData = ^TRecordData; |
| 117 |
> |
|
| 118 |
> |
{ TIBStringField allows us to have strings longer than 8196 } |
| 119 |
> |
|
| 120 |
> |
TIBStringField = class(TStringField) |
| 121 |
> |
public |
| 122 |
> |
constructor create(AOwner: TComponent); override; |
| 123 |
> |
class procedure CheckTypeSize(Value: Integer); override; |
| 124 |
> |
function GetAsString: string; override; |
| 125 |
> |
function GetAsVariant: Variant; override; |
| 126 |
> |
function GetValue(var Value: string): Boolean; |
| 127 |
> |
procedure SetAsString(const Value: string); override; |
| 128 |
> |
end; |
| 129 |
> |
|
| 130 |
> |
{ TIBBCDField } |
| 131 |
> |
{ Actually, there is no BCD involved in this type, |
| 132 |
> |
instead it deals with currency types. |
| 133 |
> |
In IB, this is an encapsulation of Numeric (x, y) |
| 134 |
> |
where x < 18 and y <= 4. |
| 135 |
> |
Note: y > 4 will default to Floats |
| 136 |
> |
} |
| 137 |
> |
TIBBCDField = class(TBCDField) |
| 138 |
> |
protected |
| 139 |
> |
class procedure CheckTypeSize(Value: Integer); override; |
| 140 |
> |
function GetAsCurrency: Currency; override; |
| 141 |
> |
function GetAsString: string; override; |
| 142 |
> |
function GetAsVariant: Variant; override; |
| 143 |
> |
function GetDataSize: Integer; override; |
| 144 |
> |
public |
| 145 |
> |
constructor Create(AOwner: TComponent); override; |
| 146 |
> |
published |
| 147 |
> |
property Size default 8; |
| 148 |
> |
end; |
| 149 |
> |
|
| 150 |
> |
TIBDataLink = class(TDetailDataLink) |
| 151 |
> |
private |
| 152 |
> |
FDataSet: TIBCustomDataSet; |
| 153 |
> |
protected |
| 154 |
> |
procedure ActiveChanged; override; |
| 155 |
> |
procedure RecordChanged(Field: TField); override; |
| 156 |
> |
function GetDetailDataSet: TDataSet; override; |
| 157 |
> |
procedure CheckBrowseMode; override; |
| 158 |
> |
public |
| 159 |
> |
constructor Create(ADataSet: TIBCustomDataSet); |
| 160 |
> |
destructor Destroy; override; |
| 161 |
> |
end; |
| 162 |
> |
|
| 163 |
> |
TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord); |
| 164 |
> |
|
| 165 |
> |
{ TIBGenerator } |
| 166 |
> |
|
| 167 |
> |
TIBGenerator = class(TPersistent) |
| 168 |
> |
private |
| 169 |
> |
FOwner: TIBCustomDataSet; |
| 170 |
> |
FApplyOnEvent: TIBGeneratorApplyOnEvent; |
| 171 |
> |
FFieldName: string; |
| 172 |
> |
FGeneratorName: string; |
| 173 |
> |
FIncrement: integer; |
| 174 |
> |
procedure SetIncrement(const AValue: integer); |
| 175 |
> |
protected |
| 176 |
> |
function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer; |
| 177 |
> |
public |
| 178 |
> |
constructor Create(Owner: TIBCustomDataSet); |
| 179 |
> |
procedure Apply; |
| 180 |
> |
property Owner: TIBCustomDataSet read FOwner; |
| 181 |
> |
published |
| 182 |
> |
property Generator: string read FGeneratorName write FGeneratorName; |
| 183 |
> |
property Field: string read FFieldName write FFieldName; |
| 184 |
> |
property Increment: integer read FIncrement write SetIncrement default 1; |
| 185 |
> |
property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent; |
| 186 |
> |
end; |
| 187 |
> |
|
| 188 |
> |
{ TIBCustomDataSet } |
| 189 |
> |
TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied); |
| 190 |
> |
|
| 191 |
> |
TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError; |
| 192 |
> |
UpdateKind: TUpdateKind; var UpdateAction: TIBUpdateAction) |
| 193 |
> |
of object; |
| 194 |
> |
TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind; |
| 195 |
> |
var UpdateAction: TIBUpdateAction) of object; |
| 196 |
> |
|
| 197 |
> |
TIBUpdateRecordTypes = set of TCachedUpdateStatus; |
| 198 |
> |
|
| 199 |
> |
TIBCustomDataSet = class(TDataset) |
| 200 |
> |
private |
| 201 |
> |
FGeneratorField: TIBGenerator; |
| 202 |
> |
FNeedsRefresh: Boolean; |
| 203 |
> |
FForcedRefresh: Boolean; |
| 204 |
> |
FDidActivate: Boolean; |
| 205 |
> |
FIBLoaded: Boolean; |
| 206 |
> |
FBase: TIBBase; |
| 207 |
> |
FBlobCacheOffset: Integer; |
| 208 |
> |
FBlobStreamList: TList; |
| 209 |
> |
FBufferChunks: Integer; |
| 210 |
> |
FBufferCache, |
| 211 |
> |
FOldBufferCache: PChar; |
| 212 |
> |
FBufferChunkSize, |
| 213 |
> |
FCacheSize, |
| 214 |
> |
FOldCacheSize: Integer; |
| 215 |
> |
FFilterBuffer: PChar; |
| 216 |
> |
FBPos, |
| 217 |
> |
FOBPos, |
| 218 |
> |
FBEnd, |
| 219 |
> |
FOBEnd: DWord; |
| 220 |
> |
FCachedUpdates: Boolean; |
| 221 |
> |
FCalcFieldsOffset: Integer; |
| 222 |
> |
FCurrentRecord: Long; |
| 223 |
> |
FDeletedRecords: Long; |
| 224 |
> |
FModelBuffer, |
| 225 |
> |
FOldBuffer: PChar; |
| 226 |
> |
FOpen: Boolean; |
| 227 |
> |
FInternalPrepared: Boolean; |
| 228 |
> |
FQDelete, |
| 229 |
> |
FQInsert, |
| 230 |
> |
FQRefresh, |
| 231 |
> |
FQSelect, |
| 232 |
> |
FQModify: TIBSQL; |
| 233 |
> |
FRecordBufferSize: Integer; |
| 234 |
> |
FRecordCount: Integer; |
| 235 |
> |
FRecordSize: Integer; |
| 236 |
> |
FUniDirectional: Boolean; |
| 237 |
> |
FUpdateMode: TUpdateMode; |
| 238 |
> |
FUpdateObject: TIBDataSetUpdateObject; |
| 239 |
> |
FParamCheck: Boolean; |
| 240 |
> |
FUpdatesPending: Boolean; |
| 241 |
> |
FUpdateRecordTypes: TIBUpdateRecordTypes; |
| 242 |
> |
FMappedFieldPosition: array of Integer; |
| 243 |
> |
FDataLink: TIBDataLink; |
| 244 |
> |
|
| 245 |
> |
FBeforeDatabaseDisconnect, |
| 246 |
> |
FAfterDatabaseDisconnect, |
| 247 |
> |
FDatabaseFree: TNotifyEvent; |
| 248 |
> |
FOnUpdateError: TIBUpdateErrorEvent; |
| 249 |
> |
FOnUpdateRecord: TIBUpdateRecordEvent; |
| 250 |
> |
FBeforeTransactionEnd, |
| 251 |
> |
FAfterTransactionEnd, |
| 252 |
> |
FTransactionFree: TNotifyEvent; |
| 253 |
> |
|
| 254 |
> |
function GetSelectStmtHandle: TISC_STMT_HANDLE; |
| 255 |
> |
procedure SetUpdateMode(const Value: TUpdateMode); |
| 256 |
> |
procedure SetUpdateObject(Value: TIBDataSetUpdateObject); |
| 257 |
> |
|
| 258 |
> |
function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult; |
| 259 |
> |
procedure AdjustRecordOnInsert(Buffer: Pointer); |
| 260 |
> |
function CanEdit: Boolean; |
| 261 |
> |
function CanInsert: Boolean; |
| 262 |
> |
function CanDelete: Boolean; |
| 263 |
> |
function CanRefresh: Boolean; |
| 264 |
> |
procedure CheckEditState; |
| 265 |
> |
procedure ClearBlobCache; |
| 266 |
> |
procedure CopyRecordBuffer(Source, Dest: Pointer); |
| 267 |
> |
procedure DoBeforeDatabaseDisconnect(Sender: TObject); |
| 268 |
> |
procedure DoAfterDatabaseDisconnect(Sender: TObject); |
| 269 |
> |
procedure DoDatabaseFree(Sender: TObject); |
| 270 |
> |
procedure DoBeforeTransactionEnd(Sender: TObject); |
| 271 |
> |
procedure DoAfterTransactionEnd(Sender: TObject); |
| 272 |
> |
procedure DoTransactionFree(Sender: TObject); |
| 273 |
> |
procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer; |
| 274 |
> |
Buffer: PChar); |
| 275 |
> |
function GetDatabase: TIBDatabase; |
| 276 |
> |
function GetDBHandle: PISC_DB_HANDLE; |
| 277 |
> |
function GetDeleteSQL: TStrings; |
| 278 |
> |
function GetInsertSQL: TStrings; |
| 279 |
> |
function GetSQLParams: TIBXSQLDA; |
| 280 |
> |
function GetRefreshSQL: TStrings; |
| 281 |
> |
function GetSelectSQL: TStrings; |
| 282 |
> |
function GetStatementType: TIBSQLTypes; |
| 283 |
> |
function GetModifySQL: TStrings; |
| 284 |
> |
function GetTransaction: TIBTransaction; |
| 285 |
> |
function GetTRHandle: PISC_TR_HANDLE; |
| 286 |
> |
procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual; |
| 287 |
> |
function InternalLocate(const KeyFields: string; const KeyValues: Variant; |
| 288 |
> |
Options: TLocateOptions): Boolean; virtual; |
| 289 |
> |
procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual; |
| 290 |
> |
procedure InternalRevertRecord(RecordNumber: Integer); virtual; |
| 291 |
> |
function IsVisible(Buffer: PChar): Boolean; |
| 292 |
> |
procedure SaveOldBuffer(Buffer: PChar); |
| 293 |
> |
procedure SetBufferChunks(Value: Integer); |
| 294 |
> |
procedure SetDatabase(Value: TIBDatabase); |
| 295 |
> |
procedure SetDeleteSQL(Value: TStrings); |
| 296 |
> |
procedure SetInsertSQL(Value: TStrings); |
| 297 |
> |
procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer); |
| 298 |
> |
procedure SetRefreshSQL(Value: TStrings); |
| 299 |
> |
procedure SetSelectSQL(Value: TStrings); |
| 300 |
> |
procedure SetModifySQL(Value: TStrings); |
| 301 |
> |
procedure SetTransaction(Value: TIBTransaction); |
| 302 |
> |
procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes); |
| 303 |
> |
procedure SetUniDirectional(Value: Boolean); |
| 304 |
> |
procedure RefreshParams; |
| 305 |
> |
procedure SQLChanging(Sender: TObject); virtual; |
| 306 |
> |
function AdjustPosition(FCache: PChar; Offset: DWORD; |
| 307 |
> |
Origin: Integer): DWORD; |
| 308 |
> |
procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer; |
| 309 |
> |
Buffer: PChar); |
| 310 |
> |
procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar; |
| 311 |
> |
ReadOldBuffer: Boolean); |
| 312 |
> |
procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer; |
| 313 |
> |
Buffer: PChar); |
| 314 |
> |
procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar); |
| 315 |
> |
function InternalGetRecord(Buffer: PChar; GetMode: TGetMode; |
| 316 |
> |
DoCheck: Boolean): TGetResult; virtual; |
| 317 |
> |
|
| 318 |
> |
protected |
| 319 |
> |
procedure ActivateConnection; |
| 320 |
> |
function ActivateTransaction: Boolean; |
| 321 |
> |
procedure DeactivateTransaction; |
| 322 |
> |
procedure CheckDatasetClosed; |
| 323 |
> |
procedure CheckDatasetOpen; |
| 324 |
> |
function GetActiveBuf: PChar; |
| 325 |
> |
procedure InternalBatchInput(InputObject: TIBBatchInput); virtual; |
| 326 |
> |
procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual; |
| 327 |
> |
procedure InternalPrepare; virtual; |
| 328 |
> |
procedure InternalUnPrepare; virtual; |
| 329 |
> |
procedure InternalExecQuery; virtual; |
| 330 |
> |
procedure InternalRefreshRow; virtual; |
| 331 |
> |
procedure InternalSetParamsFromCursor; virtual; |
| 332 |
> |
procedure CheckNotUniDirectional; |
| 333 |
> |
|
| 334 |
> |
(* { IProviderSupport } |
| 335 |
> |
procedure PSEndTransaction(Commit: Boolean); override; |
| 336 |
> |
function PSExecuteStatement(const ASQL: string; AParams: TParams; |
| 337 |
> |
ResultSet: Pointer = nil): Integer; override; |
| 338 |
> |
function PsGetTableName: string; override; |
| 339 |
> |
function PSGetQuoteChar: string; override; |
| 340 |
> |
function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override; |
| 341 |
> |
function PSInTransaction: Boolean; override; |
| 342 |
> |
function PSIsSQLBased: Boolean; override; |
| 343 |
> |
function PSIsSQLSupported: Boolean; override; |
| 344 |
> |
procedure PSStartTransaction; override; |
| 345 |
> |
procedure PSReset; override; |
| 346 |
> |
function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override; |
| 347 |
> |
*) |
| 348 |
> |
{ TDataSet support } |
| 349 |
> |
procedure InternalInsert; override; |
| 350 |
> |
procedure InitRecord(Buffer: PChar); override; |
| 351 |
> |
procedure Disconnect; virtual; |
| 352 |
> |
function ConstraintsStored: Boolean; |
| 353 |
> |
procedure ClearCalcFields(Buffer: PChar); override; |
| 354 |
> |
function AllocRecordBuffer: PChar; override; |
| 355 |
> |
procedure DoBeforeDelete; override; |
| 356 |
> |
procedure DoBeforeEdit; override; |
| 357 |
> |
procedure DoBeforeInsert; override; |
| 358 |
> |
procedure DoAfterInsert; override; |
| 359 |
> |
procedure DoBeforePost; override; |
| 360 |
> |
procedure FreeRecordBuffer(var Buffer: PChar); override; |
| 361 |
> |
procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override; |
| 362 |
> |
function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override; |
| 363 |
> |
function GetCanModify: Boolean; override; |
| 364 |
> |
function GetDataSource: TDataSource; override; |
| 365 |
> |
function GetFieldClass(FieldType: TFieldType): TFieldClass; override; |
| 366 |
> |
function GetRecNo: Integer; override; |
| 367 |
> |
function GetRecord(Buffer: PChar; GetMode: TGetMode; |
| 368 |
> |
DoCheck: Boolean): TGetResult; override; |
| 369 |
> |
function GetRecordCount: Integer; override; |
| 370 |
> |
function GetRecordSize: Word; override; |
| 371 |
> |
procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override; |
| 372 |
> |
procedure InternalCancel; override; |
| 373 |
> |
procedure InternalClose; override; |
| 374 |
> |
procedure InternalDelete; override; |
| 375 |
> |
procedure InternalFirst; override; |
| 376 |
> |
function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual; |
| 377 |
> |
procedure InternalGotoBookmark(Bookmark: Pointer); override; |
| 378 |
> |
procedure InternalHandleException; override; |
| 379 |
> |
procedure InternalInitFieldDefs; override; |
| 380 |
> |
procedure InternalInitRecord(Buffer: PChar); override; |
| 381 |
> |
procedure InternalLast; override; |
| 382 |
> |
procedure InternalOpen; override; |
| 383 |
> |
procedure InternalPost; override; |
| 384 |
> |
procedure InternalRefresh; override; |
| 385 |
> |
procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual; |
| 386 |
> |
procedure InternalSetToRecord(Buffer: PChar); override; |
| 387 |
> |
function IsCursorOpen: Boolean; override; |
| 388 |
> |
procedure ReQuery; |
| 389 |
> |
procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override; |
| 390 |
> |
procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override; |
| 391 |
> |
procedure SetCachedUpdates(Value: Boolean); |
| 392 |
> |
procedure SetDataSource(Value: TDataSource); |
| 393 |
> |
procedure SetFieldData(Field : TField; Buffer : Pointer); override; |
| 394 |
> |
procedure SetFieldData(Field : TField; Buffer : Pointer; |
| 395 |
> |
NativeFormat : Boolean); overload; override; |
| 396 |
> |
procedure SetRecNo(Value: Integer); override; |
| 397 |
> |
|
| 398 |
> |
protected |
| 399 |
> |
{Likely to be made public by descendant classes} |
| 400 |
> |
property SQLParams: TIBXSQLDA read GetSQLParams; |
| 401 |
> |
property Params: TIBXSQLDA read GetSQLParams; |
| 402 |
> |
property InternalPrepared: Boolean read FInternalPrepared; |
| 403 |
> |
property QDelete: TIBSQL read FQDelete; |
| 404 |
> |
property QInsert: TIBSQL read FQInsert; |
| 405 |
> |
property QRefresh: TIBSQL read FQRefresh; |
| 406 |
> |
property QSelect: TIBSQL read FQSelect; |
| 407 |
> |
property QModify: TIBSQL read FQModify; |
| 408 |
> |
property StatementType: TIBSQLTypes read GetStatementType; |
| 409 |
> |
property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle; |
| 410 |
> |
|
| 411 |
> |
{Likely to be made published by descendant classes} |
| 412 |
> |
property BufferChunks: Integer read FBufferChunks write SetBufferChunks; |
| 413 |
> |
property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates; |
| 414 |
> |
property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False; |
| 415 |
> |
property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField; |
| 416 |
> |
property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL; |
| 417 |
> |
property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL; |
| 418 |
> |
property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL; |
| 419 |
> |
property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL; |
| 420 |
> |
property ModifySQL: TStrings read GetModifySQL write SetModifySQL; |
| 421 |
> |
property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll; |
| 422 |
> |
property ParamCheck: Boolean read FParamCheck write FParamCheck default True; |
| 423 |
> |
|
| 424 |
> |
property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect |
| 425 |
> |
write FBeforeDatabaseDisconnect; |
| 426 |
> |
property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect |
| 427 |
> |
write FAfterDatabaseDisconnect; |
| 428 |
> |
property DatabaseFree: TNotifyEvent read FDatabaseFree |
| 429 |
> |
write FDatabaseFree; |
| 430 |
> |
property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd |
| 431 |
> |
write FBeforeTransactionEnd; |
| 432 |
> |
property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd |
| 433 |
> |
write FAfterTransactionEnd; |
| 434 |
> |
property TransactionFree: TNotifyEvent read FTransactionFree |
| 435 |
> |
write FTransactionFree; |
| 436 |
> |
|
| 437 |
> |
public |
| 438 |
> |
constructor Create(AOwner: TComponent); override; |
| 439 |
> |
destructor Destroy; override; |
| 440 |
> |
procedure ApplyUpdates; |
| 441 |
> |
function CachedUpdateStatus: TCachedUpdateStatus; |
| 442 |
> |
procedure CancelUpdates; |
| 443 |
> |
procedure FetchAll; |
| 444 |
> |
function LocateNext(const KeyFields: string; const KeyValues: Variant; |
| 445 |
> |
Options: TLocateOptions): Boolean; |
| 446 |
> |
procedure RecordModified(Value: Boolean); |
| 447 |
> |
procedure RevertRecord; |
| 448 |
> |
procedure Undelete; |
| 449 |
> |
|
| 450 |
> |
{ TDataSet support methods } |
| 451 |
> |
function BookmarkValid(Bookmark: TBookmark): Boolean; override; |
| 452 |
> |
function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override; |
| 453 |
> |
function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override; |
| 454 |
> |
function GetCurrentRecord(Buffer: PChar): Boolean; override; |
| 455 |
> |
function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override; |
| 456 |
> |
function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*) |
| 457 |
> |
function GetFieldData(Field : TField; Buffer : Pointer; |
| 458 |
> |
NativeFormat : Boolean) : Boolean; overload; override; |
| 459 |
> |
function Locate(const KeyFields: string; const KeyValues: Variant; |
| 460 |
> |
Options: TLocateOptions): Boolean; override; |
| 461 |
> |
function Lookup(const KeyFields: string; const KeyValues: Variant; |
| 462 |
> |
const ResultFields: string): Variant; override; |
| 463 |
> |
function UpdateStatus: TUpdateStatus; override; |
| 464 |
> |
function IsSequenced: Boolean; override; |
| 465 |
> |
function ParamByName(ParamName: String): TIBXSQLVAR; |
| 466 |
> |
property DBHandle: PISC_DB_HANDLE read GetDBHandle; |
| 467 |
> |
property TRHandle: PISC_TR_HANDLE read GetTRHandle; |
| 468 |
> |
property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject; |
| 469 |
> |
property UpdatesPending: Boolean read FUpdatesPending; |
| 470 |
> |
property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes |
| 471 |
> |
write SetUpdateRecordTypes; |
| 472 |
> |
|
| 473 |
> |
published |
| 474 |
> |
property Database: TIBDatabase read GetDatabase write SetDatabase; |
| 475 |
> |
property Transaction: TIBTransaction read GetTransaction |
| 476 |
> |
write SetTransaction; |
| 477 |
> |
property ForcedRefresh: Boolean read FForcedRefresh |
| 478 |
> |
write FForcedRefresh default False; |
| 479 |
> |
property AutoCalcFields; |
| 480 |
> |
|
| 481 |
> |
property AfterCancel; |
| 482 |
> |
property AfterClose; |
| 483 |
> |
property AfterDelete; |
| 484 |
> |
property AfterEdit; |
| 485 |
> |
property AfterInsert; |
| 486 |
> |
property AfterOpen; |
| 487 |
> |
property AfterPost; |
| 488 |
> |
property AfterRefresh; |
| 489 |
> |
property AfterScroll; |
| 490 |
> |
property BeforeCancel; |
| 491 |
> |
property BeforeClose; |
| 492 |
> |
property BeforeDelete; |
| 493 |
> |
property BeforeEdit; |
| 494 |
> |
property BeforeInsert; |
| 495 |
> |
property BeforeOpen; |
| 496 |
> |
property BeforePost; |
| 497 |
> |
property BeforeRefresh; |
| 498 |
> |
property BeforeScroll; |
| 499 |
> |
property OnCalcFields; |
| 500 |
> |
property OnDeleteError; |
| 501 |
> |
property OnEditError; |
| 502 |
> |
property OnNewRecord; |
| 503 |
> |
property OnPostError; |
| 504 |
> |
property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError |
| 505 |
> |
write FOnUpdateError; |
| 506 |
> |
property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord |
| 507 |
> |
write FOnUpdateRecord; |
| 508 |
> |
end; |
| 509 |
> |
|
| 510 |
> |
TIBDataSet = class(TIBCustomDataSet) |
| 511 |
> |
private |
| 512 |
> |
function GetPrepared: Boolean; |
| 513 |
> |
|
| 514 |
> |
protected |
| 515 |
> |
procedure SetFiltered(Value: Boolean); override; |
| 516 |
> |
procedure InternalOpen; override; |
| 517 |
> |
|
| 518 |
> |
public |
| 519 |
> |
procedure Prepare; |
| 520 |
> |
procedure UnPrepare; |
| 521 |
> |
procedure BatchInput(InputObject: TIBBatchInput); |
| 522 |
> |
procedure BatchOutput(OutputObject: TIBBatchOutput); |
| 523 |
> |
procedure ExecSQL; |
| 524 |
> |
|
| 525 |
> |
public |
| 526 |
> |
property Params; |
| 527 |
> |
property Prepared : Boolean read GetPrepared; |
| 528 |
> |
property QDelete; |
| 529 |
> |
property QInsert; |
| 530 |
> |
property QRefresh; |
| 531 |
> |
property QSelect; |
| 532 |
> |
property QModify; |
| 533 |
> |
property StatementType; |
| 534 |
> |
property SelectStmtHandle; |
| 535 |
> |
|
| 536 |
> |
published |
| 537 |
> |
{ TIBCustomDataSet } |
| 538 |
> |
property BufferChunks; |
| 539 |
> |
property CachedUpdates; |
| 540 |
> |
property DeleteSQL; |
| 541 |
> |
property InsertSQL; |
| 542 |
> |
property RefreshSQL; |
| 543 |
> |
property SelectSQL; |
| 544 |
> |
property ModifySQL; |
| 545 |
> |
property GeneratorField; |
| 546 |
> |
property ParamCheck; |
| 547 |
> |
property UniDirectional; |
| 548 |
> |
property Filtered; |
| 549 |
> |
|
| 550 |
> |
property BeforeDatabaseDisconnect; |
| 551 |
> |
property AfterDatabaseDisconnect; |
| 552 |
> |
property DatabaseFree; |
| 553 |
> |
property BeforeTransactionEnd; |
| 554 |
> |
property AfterTransactionEnd; |
| 555 |
> |
property TransactionFree; |
| 556 |
> |
|
| 557 |
> |
{ TIBDataSet } |
| 558 |
> |
property Active; |
| 559 |
> |
property AutoCalcFields; |
| 560 |
> |
property DataSource read GetDataSource write SetDataSource; |
| 561 |
> |
|
| 562 |
> |
property AfterCancel; |
| 563 |
> |
property AfterClose; |
| 564 |
> |
property AfterDelete; |
| 565 |
> |
property AfterEdit; |
| 566 |
> |
property AfterInsert; |
| 567 |
> |
property AfterOpen; |
| 568 |
> |
property AfterPost; |
| 569 |
> |
property AfterScroll; |
| 570 |
> |
property BeforeCancel; |
| 571 |
> |
property BeforeClose; |
| 572 |
> |
property BeforeDelete; |
| 573 |
> |
property BeforeEdit; |
| 574 |
> |
property BeforeInsert; |
| 575 |
> |
property BeforeOpen; |
| 576 |
> |
property BeforePost; |
| 577 |
> |
property BeforeScroll; |
| 578 |
> |
property OnCalcFields; |
| 579 |
> |
property OnDeleteError; |
| 580 |
> |
property OnEditError; |
| 581 |
> |
property OnFilterRecord; |
| 582 |
> |
property OnNewRecord; |
| 583 |
> |
property OnPostError; |
| 584 |
> |
end; |
| 585 |
> |
|
| 586 |
> |
{ TIBDSBlobStream } |
| 587 |
> |
TIBDSBlobStream = class(TStream) |
| 588 |
> |
protected |
| 589 |
> |
FField: TField; |
| 590 |
> |
FBlobStream: TIBBlobStream; |
| 591 |
> |
public |
| 592 |
> |
constructor Create(AField: TField; ABlobStream: TIBBlobStream; |
| 593 |
> |
Mode: TBlobStreamMode); |
| 594 |
> |
function Read(var Buffer; Count: Longint): Longint; override; |
| 595 |
> |
function Seek(Offset: Longint; Origin: Word): Longint; override; |
| 596 |
> |
procedure SetSize(NewSize: Longint); override; |
| 597 |
> |
function Write(const Buffer; Count: Longint): Longint; override; |
| 598 |
> |
end; |
| 599 |
> |
|
| 600 |
> |
const |
| 601 |
> |
DefaultFieldClasses: array[TFieldType] of TFieldClass = ( |
| 602 |
> |
nil, { ftUnknown } |
| 603 |
> |
TIBStringField, { ftString } |
| 604 |
> |
TSmallintField, { ftSmallint } |
| 605 |
> |
TIntegerField, { ftInteger } |
| 606 |
> |
TWordField, { ftWord } |
| 607 |
> |
TBooleanField, { ftBoolean } |
| 608 |
> |
TFloatField, { ftFloat } |
| 609 |
> |
TCurrencyField, { ftCurrency } |
| 610 |
> |
TIBBCDField, { ftBCD } |
| 611 |
> |
TDateField, { ftDate } |
| 612 |
> |
TTimeField, { ftTime } |
| 613 |
> |
TDateTimeField, { ftDateTime } |
| 614 |
> |
TBytesField, { ftBytes } |
| 615 |
> |
TVarBytesField, { ftVarBytes } |
| 616 |
> |
TAutoIncField, { ftAutoInc } |
| 617 |
> |
TBlobField, { ftBlob } |
| 618 |
> |
TMemoField, { ftMemo } |
| 619 |
> |
TGraphicField, { ftGraphic } |
| 620 |
> |
TBlobField, { ftFmtMemo } |
| 621 |
> |
TBlobField, { ftParadoxOle } |
| 622 |
> |
TBlobField, { ftDBaseOle } |
| 623 |
> |
TBlobField, { ftTypedBinary } |
| 624 |
> |
nil, { ftCursor } |
| 625 |
> |
TStringField, { ftFixedChar } |
| 626 |
> |
TWideStringField, { ftWideString } |
| 627 |
> |
TLargeIntField, { ftLargeInt } |
| 628 |
> |
nil, { ftADT } |
| 629 |
> |
nil, { ftArray } |
| 630 |
> |
nil, { ftReference } |
| 631 |
> |
nil, { ftDataSet } |
| 632 |
> |
TBlobField, { ftOraBlob } |
| 633 |
> |
TMemoField, { ftOraClob } |
| 634 |
> |
TVariantField, { ftVariant } |
| 635 |
> |
nil, { ftInterface } |
| 636 |
> |
nil, { ftIDispatch } |
| 637 |
> |
TGuidField, { ftGuid } |
| 638 |
> |
TDateTimeField, {ftTimestamp} |
| 639 |
> |
TIBBCDField, {ftFMTBcd} |
| 640 |
> |
nil, {ftFixedWideChar} |
| 641 |
> |
TWideMemoField); {ftWideMemo} |
| 642 |
> |
(* |
| 643 |
> |
TADTField, { ftADT } |
| 644 |
> |
TArrayField, { ftArray } |
| 645 |
> |
TReferenceField, { ftReference } |
| 646 |
> |
TDataSetField, { ftDataSet } |
| 647 |
> |
TBlobField, { ftOraBlob } |
| 648 |
> |
TMemoField, { ftOraClob } |
| 649 |
> |
TVariantField, { ftVariant } |
| 650 |
> |
TInterfaceField, { ftInterface } |
| 651 |
> |
TIDispatchField, { ftIDispatch } |
| 652 |
> |
TGuidField); { ftGuid } *) |
| 653 |
> |
(*var |
| 654 |
> |
CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*) |
| 655 |
> |
|
| 656 |
> |
implementation |
| 657 |
> |
|
| 658 |
> |
uses IBIntf, Variants, FmtBCD; |
| 659 |
> |
|
| 660 |
> |
const FILE_BEGIN = 0; |
| 661 |
> |
FILE_CURRENT = 1; |
| 662 |
> |
FILE_END = 2; |
| 663 |
> |
|
| 664 |
> |
type |
| 665 |
> |
|
| 666 |
> |
TFieldNode = class(TObject) |
| 667 |
> |
protected |
| 668 |
> |
FieldName : String; |
| 669 |
> |
COMPUTED_BLR : Boolean; |
| 670 |
> |
DEFAULT_VALUE : boolean; |
| 671 |
> |
NextField : TFieldNode; |
| 672 |
> |
end; |
| 673 |
> |
|
| 674 |
> |
TRelationNode = class(TObject) |
| 675 |
> |
protected |
| 676 |
> |
RelationName : String; |
| 677 |
> |
FieldNodes : TFieldNode; |
| 678 |
> |
NextRelation : TRelationNode; |
| 679 |
> |
end; |
| 680 |
> |
|
| 681 |
> |
|
| 682 |
> |
{ TIBStringField} |
| 683 |
> |
|
| 684 |
> |
constructor TIBStringField.Create(AOwner: TComponent); |
| 685 |
> |
begin |
| 686 |
> |
inherited Create(AOwner); |
| 687 |
> |
end; |
| 688 |
> |
|
| 689 |
> |
class procedure TIBStringField.CheckTypeSize(Value: Integer); |
| 690 |
> |
begin |
| 691 |
> |
{ don't check string size. all sizes valid } |
| 692 |
> |
end; |
| 693 |
> |
|
| 694 |
> |
function TIBStringField.GetAsString: string; |
| 695 |
> |
begin |
| 696 |
> |
if not GetValue(Result) then Result := ''; |
| 697 |
> |
end; |
| 698 |
> |
|
| 699 |
> |
function TIBStringField.GetAsVariant: Variant; |
| 700 |
> |
var |
| 701 |
> |
S: string; |
| 702 |
> |
begin |
| 703 |
> |
if GetValue(S) then Result := S else Result := Null; |
| 704 |
> |
end; |
| 705 |
> |
|
| 706 |
> |
function TIBStringField.GetValue(var Value: string): Boolean; |
| 707 |
> |
var |
| 708 |
> |
Buffer: PChar; |
| 709 |
> |
begin |
| 710 |
> |
Buffer := nil; |
| 711 |
> |
IBAlloc(Buffer, 0, Size + 1); |
| 712 |
> |
try |
| 713 |
> |
Result := GetData(Buffer); |
| 714 |
> |
if Result then |
| 715 |
> |
begin |
| 716 |
> |
Value := string(Buffer); |
| 717 |
> |
if Transliterate and (Value <> '') then |
| 718 |
> |
DataSet.Translate(PChar(Value), PChar(Value), False); |
| 719 |
> |
end |
| 720 |
> |
finally |
| 721 |
> |
FreeMem(Buffer); |
| 722 |
> |
end; |
| 723 |
> |
end; |
| 724 |
> |
|
| 725 |
> |
procedure TIBStringField.SetAsString(const Value: string); |
| 726 |
> |
var |
| 727 |
> |
Buffer: PChar; |
| 728 |
> |
begin |
| 729 |
> |
Buffer := nil; |
| 730 |
> |
IBAlloc(Buffer, 0, Size + 1); |
| 731 |
> |
try |
| 732 |
> |
StrLCopy(Buffer, PChar(Value), Size); |
| 733 |
> |
if Transliterate then |
| 734 |
> |
DataSet.Translate(Buffer, Buffer, True); |
| 735 |
> |
SetData(Buffer); |
| 736 |
> |
finally |
| 737 |
> |
FreeMem(Buffer); |
| 738 |
> |
end; |
| 739 |
> |
end; |
| 740 |
> |
|
| 741 |
> |
{ TIBBCDField } |
| 742 |
> |
|
| 743 |
> |
constructor TIBBCDField.Create(AOwner: TComponent); |
| 744 |
> |
begin |
| 745 |
> |
inherited Create(AOwner); |
| 746 |
> |
SetDataType(ftBCD); |
| 747 |
> |
Size := 8; |
| 748 |
> |
end; |
| 749 |
> |
|
| 750 |
> |
class procedure TIBBCDField.CheckTypeSize(Value: Integer); |
| 751 |
> |
begin |
| 752 |
> |
{ No need to check as the base type is currency, not BCD } |
| 753 |
> |
end; |
| 754 |
> |
|
| 755 |
> |
function TIBBCDField.GetAsCurrency: Currency; |
| 756 |
> |
begin |
| 757 |
> |
if not GetValue(Result) then |
| 758 |
> |
Result := 0; |
| 759 |
> |
end; |
| 760 |
> |
|
| 761 |
> |
function TIBBCDField.GetAsString: string; |
| 762 |
> |
var |
| 763 |
> |
C: System.Currency; |
| 764 |
> |
begin |
| 765 |
> |
if GetValue(C) then |
| 766 |
> |
Result := CurrToStr(C) |
| 767 |
> |
else |
| 768 |
> |
Result := ''; |
| 769 |
> |
end; |
| 770 |
> |
|
| 771 |
> |
function TIBBCDField.GetAsVariant: Variant; |
| 772 |
> |
var |
| 773 |
> |
C: System.Currency; |
| 774 |
> |
begin |
| 775 |
> |
if GetValue(C) then |
| 776 |
> |
Result := C |
| 777 |
> |
else |
| 778 |
> |
Result := Null; |
| 779 |
> |
end; |
| 780 |
> |
|
| 781 |
> |
function TIBBCDField.GetDataSize: Integer; |
| 782 |
> |
begin |
| 783 |
> |
{$IFDEF TBCDFIELD_IS_BCD} |
| 784 |
> |
Result := 8; |
| 785 |
> |
{$ELSE} |
| 786 |
> |
Result := inherited GetDataSize |
| 787 |
> |
{$ENDIF} |
| 788 |
> |
end; |
| 789 |
> |
|
| 790 |
> |
{ TIBDataLink } |
| 791 |
> |
|
| 792 |
> |
constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet); |
| 793 |
> |
begin |
| 794 |
> |
inherited Create; |
| 795 |
> |
FDataSet := ADataSet; |
| 796 |
> |
end; |
| 797 |
> |
|
| 798 |
> |
destructor TIBDataLink.Destroy; |
| 799 |
> |
begin |
| 800 |
> |
FDataSet.FDataLink := nil; |
| 801 |
> |
inherited Destroy; |
| 802 |
> |
end; |
| 803 |
> |
|
| 804 |
> |
|
| 805 |
> |
procedure TIBDataLink.ActiveChanged; |
| 806 |
> |
begin |
| 807 |
> |
if FDataSet.Active then |
| 808 |
> |
FDataSet.RefreshParams; |
| 809 |
> |
end; |
| 810 |
> |
|
| 811 |
> |
|
| 812 |
> |
function TIBDataLink.GetDetailDataSet: TDataSet; |
| 813 |
> |
begin |
| 814 |
> |
Result := FDataSet; |
| 815 |
> |
end; |
| 816 |
> |
|
| 817 |
> |
procedure TIBDataLink.RecordChanged(Field: TField); |
| 818 |
> |
begin |
| 819 |
> |
if (Field = nil) and FDataSet.Active then |
| 820 |
> |
FDataSet.RefreshParams; |
| 821 |
> |
end; |
| 822 |
> |
|
| 823 |
> |
procedure TIBDataLink.CheckBrowseMode; |
| 824 |
> |
begin |
| 825 |
> |
if FDataSet.Active then |
| 826 |
> |
FDataSet.CheckBrowseMode; |
| 827 |
> |
end; |
| 828 |
> |
|
| 829 |
> |
{ TIBCustomDataSet } |
| 830 |
> |
|
| 831 |
> |
constructor TIBCustomDataSet.Create(AOwner: TComponent); |
| 832 |
> |
begin |
| 833 |
> |
inherited Create(AOwner); |
| 834 |
> |
FIBLoaded := False; |
| 835 |
> |
CheckIBLoaded; |
| 836 |
> |
FIBLoaded := True; |
| 837 |
> |
FBase := TIBBase.Create(Self); |
| 838 |
> |
FCurrentRecord := -1; |
| 839 |
> |
FDeletedRecords := 0; |
| 840 |
> |
FUniDirectional := False; |
| 841 |
> |
FBufferChunks := BufferCacheSize; |
| 842 |
> |
FBlobStreamList := TList.Create; |
| 843 |
> |
FGeneratorField := TIBGenerator.Create(self); |
| 844 |
> |
FDataLink := TIBDataLink.Create(Self); |
| 845 |
> |
FQDelete := TIBSQL.Create(Self); |
| 846 |
> |
FQDelete.OnSQLChanging := SQLChanging; |
| 847 |
> |
FQDelete.GoToFirstRecordOnExecute := False; |
| 848 |
> |
FQInsert := TIBSQL.Create(Self); |
| 849 |
> |
FQInsert.OnSQLChanging := SQLChanging; |
| 850 |
> |
FQInsert.GoToFirstRecordOnExecute := False; |
| 851 |
> |
FQRefresh := TIBSQL.Create(Self); |
| 852 |
> |
FQRefresh.OnSQLChanging := SQLChanging; |
| 853 |
> |
FQRefresh.GoToFirstRecordOnExecute := False; |
| 854 |
> |
FQSelect := TIBSQL.Create(Self); |
| 855 |
> |
FQSelect.OnSQLChanging := SQLChanging; |
| 856 |
> |
FQSelect.GoToFirstRecordOnExecute := False; |
| 857 |
> |
FQModify := TIBSQL.Create(Self); |
| 858 |
> |
FQModify.OnSQLChanging := SQLChanging; |
| 859 |
> |
FQModify.GoToFirstRecordOnExecute := False; |
| 860 |
> |
FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted]; |
| 861 |
> |
FParamCheck := True; |
| 862 |
> |
FForcedRefresh := False; |
| 863 |
> |
{Bookmark Size is Integer for IBX} |
| 864 |
> |
BookmarkSize := SizeOf(Integer); |
| 865 |
> |
FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect; |
| 866 |
> |
FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect; |
| 867 |
> |
FBase.OnDatabaseFree := DoDatabaseFree; |
| 868 |
> |
FBase.BeforeTransactionEnd := DoBeforeTransactionEnd; |
| 869 |
> |
FBase.AfterTransactionEnd := DoAfterTransactionEnd; |
| 870 |
> |
FBase.OnTransactionFree := DoTransactionFree; |
| 871 |
> |
if AOwner is TIBDatabase then |
| 872 |
> |
Database := TIBDatabase(AOwner) |
| 873 |
> |
else |
| 874 |
> |
if AOwner is TIBTransaction then |
| 875 |
> |
Transaction := TIBTransaction(AOwner); |
| 876 |
> |
end; |
| 877 |
> |
|
| 878 |
> |
destructor TIBCustomDataSet.Destroy; |
| 879 |
> |
begin |
| 880 |
> |
if Active then Active := false; |
| 881 |
> |
if FIBLoaded then |
| 882 |
> |
begin |
| 883 |
> |
if assigned(FGeneratorField) then FGeneratorField.Free; |
| 884 |
> |
FDataLink.Free; |
| 885 |
> |
FBase.Free; |
| 886 |
> |
ClearBlobCache; |
| 887 |
> |
FBlobStreamList.Free; |
| 888 |
> |
FreeMem(FBufferCache); |
| 889 |
> |
FBufferCache := nil; |
| 890 |
> |
FreeMem(FOldBufferCache); |
| 891 |
> |
FOldBufferCache := nil; |
| 892 |
> |
FCacheSize := 0; |
| 893 |
> |
FOldCacheSize := 0; |
| 894 |
> |
FMappedFieldPosition := nil; |
| 895 |
> |
end; |
| 896 |
> |
inherited Destroy; |
| 897 |
> |
end; |
| 898 |
> |
|
| 899 |
> |
function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): |
| 900 |
> |
TGetResult; |
| 901 |
> |
begin |
| 902 |
> |
while not IsVisible(Buffer) do |
| 903 |
> |
begin |
| 904 |
> |
if GetMode = gmPrior then |
| 905 |
> |
begin |
| 906 |
> |
Dec(FCurrentRecord); |
| 907 |
> |
if FCurrentRecord = -1 then |
| 908 |
> |
begin |
| 909 |
> |
result := grBOF; |
| 910 |
> |
exit; |
| 911 |
> |
end; |
| 912 |
> |
ReadRecordCache(FCurrentRecord, Buffer, False); |
| 913 |
> |
end |
| 914 |
> |
else begin |
| 915 |
> |
Inc(FCurrentRecord); |
| 916 |
> |
if (FCurrentRecord = FRecordCount) then |
| 917 |
> |
begin |
| 918 |
> |
if (not FQSelect.EOF) and (FQSelect.Next <> nil) then |
| 919 |
> |
begin |
| 920 |
> |
FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer); |
| 921 |
> |
Inc(FRecordCount); |
| 922 |
> |
end |
| 923 |
> |
else begin |
| 924 |
> |
result := grEOF; |
| 925 |
> |
exit; |
| 926 |
> |
end; |
| 927 |
> |
end |
| 928 |
> |
else |
| 929 |
> |
ReadRecordCache(FCurrentRecord, Buffer, False); |
| 930 |
> |
end; |
| 931 |
> |
end; |
| 932 |
> |
result := grOK; |
| 933 |
> |
end; |
| 934 |
> |
|
| 935 |
> |
procedure TIBCustomDataSet.ApplyUpdates; |
| 936 |
> |
var |
| 937 |
> |
{$IF FPC_FULLVERSION >= 20700 } |
| 938 |
> |
CurBookmark: TBookmark; |
| 939 |
> |
{$ELSE} |
| 940 |
> |
CurBookmark: string; |
| 941 |
> |
{$ENDIF} |
| 942 |
> |
Buffer: PRecordData; |
| 943 |
> |
CurUpdateTypes: TIBUpdateRecordTypes; |
| 944 |
> |
UpdateAction: TIBUpdateAction; |
| 945 |
> |
UpdateKind: TUpdateKind; |
| 946 |
> |
bRecordsSkipped: Boolean; |
| 947 |
> |
|
| 948 |
> |
procedure GetUpdateKind; |
| 949 |
> |
begin |
| 950 |
> |
case Buffer^.rdCachedUpdateStatus of |
| 951 |
> |
cusModified: |
| 952 |
> |
UpdateKind := ukModify; |
| 953 |
> |
cusInserted: |
| 954 |
> |
UpdateKind := ukInsert; |
| 955 |
> |
else |
| 956 |
> |
UpdateKind := ukDelete; |
| 957 |
> |
end; |
| 958 |
> |
end; |
| 959 |
> |
|
| 960 |
> |
procedure ResetBufferUpdateStatus; |
| 961 |
> |
begin |
| 962 |
> |
case Buffer^.rdCachedUpdateStatus of |
| 963 |
> |
cusModified: |
| 964 |
> |
begin |
| 965 |
> |
PRecordData(Buffer)^.rdUpdateStatus := usUnmodified; |
| 966 |
> |
PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified; |
| 967 |
> |
end; |
| 968 |
> |
cusInserted: |
| 969 |
> |
begin |
| 970 |
> |
PRecordData(Buffer)^.rdUpdateStatus := usUnmodified; |
| 971 |
> |
PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified; |
| 972 |
> |
end; |
| 973 |
> |
cusDeleted: |
| 974 |
> |
begin |
| 975 |
> |
PRecordData(Buffer)^.rdUpdateStatus := usDeleted; |
| 976 |
> |
PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified; |
| 977 |
> |
end; |
| 978 |
> |
end; |
| 979 |
> |
WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer)); |
| 980 |
> |
end; |
| 981 |
> |
|
| 982 |
> |
procedure UpdateUsingOnUpdateRecord; |
| 983 |
> |
begin |
| 984 |
> |
UpdateAction := uaFail; |
| 985 |
> |
try |
| 986 |
> |
FOnUpdateRecord(Self, UpdateKind, UpdateAction); |
| 987 |
> |
except |
| 988 |
> |
on E: Exception do |
| 989 |
> |
begin |
| 990 |
> |
if (E is EDatabaseError) and Assigned(FOnUpdateError) then |
| 991 |
> |
FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction); |
| 992 |
> |
if UpdateAction = uaFail then |
| 993 |
> |
raise; |
| 994 |
> |
end; |
| 995 |
> |
end; |
| 996 |
> |
end; |
| 997 |
> |
|
| 998 |
> |
procedure UpdateUsingUpdateObject; |
| 999 |
> |
begin |
| 1000 |
> |
try |
| 1001 |
> |
FUpdateObject.Apply(UpdateKind,PChar(Buffer)); |
| 1002 |
> |
ResetBufferUpdateStatus; |
| 1003 |
> |
except |
| 1004 |
> |
on E: Exception do |
| 1005 |
> |
if (E is EDatabaseError) and Assigned(FOnUpdateError) then |
| 1006 |
> |
FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction); |
| 1007 |
> |
end; |
| 1008 |
> |
end; |
| 1009 |
> |
|
| 1010 |
> |
procedure UpdateUsingInternalquery; |
| 1011 |
> |
begin |
| 1012 |
> |
try |
| 1013 |
> |
case Buffer^.rdCachedUpdateStatus of |
| 1014 |
> |
cusModified: |
| 1015 |
> |
InternalPostRecord(FQModify, Buffer); |
| 1016 |
> |
cusInserted: |
| 1017 |
> |
InternalPostRecord(FQInsert, Buffer); |
| 1018 |
> |
cusDeleted: |
| 1019 |
> |
InternalDeleteRecord(FQDelete, Buffer); |
| 1020 |
> |
end; |
| 1021 |
> |
except |
| 1022 |
> |
on E: EIBError do begin |
| 1023 |
> |
UpdateAction := uaFail; |
| 1024 |
> |
if Assigned(FOnUpdateError) then |
| 1025 |
> |
FOnUpdateError(Self, E, UpdateKind, UpdateAction); |
| 1026 |
> |
case UpdateAction of |
| 1027 |
> |
uaFail: raise; |
| 1028 |
> |
uaAbort: SysUtils.Abort; |
| 1029 |
> |
uaSkip: bRecordsSkipped := True; |
| 1030 |
> |
end; |
| 1031 |
> |
end; |
| 1032 |
> |
end; |
| 1033 |
> |
end; |
| 1034 |
> |
|
| 1035 |
> |
begin |
| 1036 |
> |
if State in [dsEdit, dsInsert] then |
| 1037 |
> |
Post; |
| 1038 |
> |
FBase.CheckDatabase; |
| 1039 |
> |
FBase.CheckTransaction; |
| 1040 |
> |
DisableControls; |
| 1041 |
> |
CurBookmark := Bookmark; |
| 1042 |
> |
CurUpdateTypes := FUpdateRecordTypes; |
| 1043 |
> |
FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted]; |
| 1044 |
> |
try |
| 1045 |
> |
First; |
| 1046 |
> |
bRecordsSkipped := False; |
| 1047 |
> |
while not EOF do |
| 1048 |
> |
begin |
| 1049 |
> |
Buffer := PRecordData(GetActiveBuf); |
| 1050 |
> |
GetUpdateKind; |
| 1051 |
> |
UpdateAction := uaApply; |
| 1052 |
> |
if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then |
| 1053 |
> |
begin |
| 1054 |
> |
if (Assigned(FOnUpdateRecord)) then |
| 1055 |
> |
UpdateUsingOnUpdateRecord |
| 1056 |
> |
else |
| 1057 |
> |
if Assigned(FUpdateObject) then |
| 1058 |
> |
UpdateUsingUpdateObject; |
| 1059 |
> |
case UpdateAction of |
| 1060 |
> |
uaFail: |
| 1061 |
> |
IBError(ibxeUserAbort, [nil]); |
| 1062 |
> |
uaAbort: |
| 1063 |
> |
SysUtils.Abort; |
| 1064 |
> |
uaApplied: |
| 1065 |
> |
ResetBufferUpdateStatus; |
| 1066 |
> |
uaSkip: |
| 1067 |
> |
bRecordsSkipped := True; |
| 1068 |
> |
uaRetry: |
| 1069 |
> |
Continue; |
| 1070 |
> |
end; |
| 1071 |
> |
end; |
| 1072 |
> |
if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then |
| 1073 |
> |
begin |
| 1074 |
> |
UpdateUsingInternalquery; |
| 1075 |
> |
UpdateAction := uaApplied; |
| 1076 |
> |
end; |
| 1077 |
> |
Next; |
| 1078 |
> |
end; |
| 1079 |
> |
FUpdatesPending := bRecordsSkipped; |
| 1080 |
> |
finally |
| 1081 |
> |
FUpdateRecordTypes := CurUpdateTypes; |
| 1082 |
> |
Bookmark := CurBookmark; |
| 1083 |
> |
EnableControls; |
| 1084 |
> |
end; |
| 1085 |
> |
end; |
| 1086 |
> |
|
| 1087 |
> |
procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput); |
| 1088 |
> |
begin |
| 1089 |
> |
FQSelect.BatchInput(InputObject); |
| 1090 |
> |
end; |
| 1091 |
> |
|
| 1092 |
> |
procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput); |
| 1093 |
> |
var |
| 1094 |
> |
Qry: TIBSQL; |
| 1095 |
> |
begin |
| 1096 |
> |
Qry := TIBSQL.Create(Self); |
| 1097 |
> |
try |
| 1098 |
> |
Qry.Database := FBase.Database; |
| 1099 |
> |
Qry.Transaction := FBase.Transaction; |
| 1100 |
> |
Qry.SQL.Assign(FQSelect.SQL); |
| 1101 |
> |
Qry.BatchOutput(OutputObject); |
| 1102 |
> |
finally |
| 1103 |
> |
Qry.Free; |
| 1104 |
> |
end; |
| 1105 |
> |
end; |
| 1106 |
> |
|
| 1107 |
> |
procedure TIBCustomDataSet.CancelUpdates; |
| 1108 |
> |
var |
| 1109 |
> |
CurUpdateTypes: TIBUpdateRecordTypes; |
| 1110 |
> |
begin |
| 1111 |
> |
if State in [dsEdit, dsInsert] then |
| 1112 |
> |
Post; |
| 1113 |
> |
if FCachedUpdates and FUpdatesPending then |
| 1114 |
> |
begin |
| 1115 |
> |
DisableControls; |
| 1116 |
> |
CurUpdateTypes := UpdateRecordTypes; |
| 1117 |
> |
UpdateRecordTypes := [cusModified, cusInserted, cusDeleted]; |
| 1118 |
> |
try |
| 1119 |
> |
First; |
| 1120 |
> |
while not EOF do |
| 1121 |
> |
begin |
| 1122 |
> |
if UpdateStatus = usInserted then |
| 1123 |
> |
RevertRecord |
| 1124 |
> |
else |
| 1125 |
> |
begin |
| 1126 |
> |
RevertRecord; |
| 1127 |
> |
Next; |
| 1128 |
> |
end; |
| 1129 |
> |
end; |
| 1130 |
> |
finally |
| 1131 |
> |
UpdateRecordTypes := CurUpdateTypes; |
| 1132 |
> |
First; |
| 1133 |
> |
FUpdatesPending := False; |
| 1134 |
> |
EnableControls; |
| 1135 |
> |
end; |
| 1136 |
> |
end; |
| 1137 |
> |
end; |
| 1138 |
> |
|
| 1139 |
> |
procedure TIBCustomDataSet.ActivateConnection; |
| 1140 |
> |
begin |
| 1141 |
> |
if not Assigned(Database) then |
| 1142 |
> |
IBError(ibxeDatabaseNotAssigned, [nil]); |
| 1143 |
> |
if not Assigned(Transaction) then |
| 1144 |
> |
IBError(ibxeTransactionNotAssigned, [nil]); |
| 1145 |
> |
if not Database.Connected then Database.Open; |
| 1146 |
> |
end; |
| 1147 |
> |
|
| 1148 |
> |
function TIBCustomDataSet.ActivateTransaction: Boolean; |
| 1149 |
> |
begin |
| 1150 |
> |
Result := False; |
| 1151 |
> |
if not Assigned(Transaction) then |
| 1152 |
> |
IBError(ibxeTransactionNotAssigned, [nil]); |
| 1153 |
> |
if not Transaction.Active then |
| 1154 |
> |
begin |
| 1155 |
> |
Result := True; |
| 1156 |
> |
Transaction.StartTransaction; |
| 1157 |
> |
FDidActivate := True; |
| 1158 |
> |
end; |
| 1159 |
> |
end; |
| 1160 |
> |
|
| 1161 |
> |
procedure TIBCustomDataSet.DeactivateTransaction; |
| 1162 |
> |
var |
| 1163 |
> |
i: Integer; |
| 1164 |
> |
begin |
| 1165 |
> |
if not Assigned(Transaction) then |
| 1166 |
> |
IBError(ibxeTransactionNotAssigned, [nil]); |
| 1167 |
> |
with Transaction do |
| 1168 |
> |
begin |
| 1169 |
> |
for i := 0 to SQLObjectCount - 1 do |
| 1170 |
> |
begin |
| 1171 |
> |
if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then |
| 1172 |
> |
begin |
| 1173 |
> |
if TDataSet(SQLObjects[i].owner).Active then |
| 1174 |
> |
begin |
| 1175 |
> |
FDidActivate := False; |
| 1176 |
> |
exit; |
| 1177 |
> |
end; |
| 1178 |
> |
end; |
| 1179 |
> |
end; |
| 1180 |
> |
end; |
| 1181 |
> |
FInternalPrepared := False; |
| 1182 |
> |
if Transaction.InTransaction then |
| 1183 |
> |
Transaction.Commit; |
| 1184 |
> |
FDidActivate := False; |
| 1185 |
> |
end; |
| 1186 |
> |
|
| 1187 |
> |
procedure TIBCustomDataSet.CheckDatasetClosed; |
| 1188 |
> |
begin |
| 1189 |
> |
if FOpen then |
| 1190 |
> |
IBError(ibxeDatasetOpen, [nil]); |
| 1191 |
> |
end; |
| 1192 |
> |
|
| 1193 |
> |
procedure TIBCustomDataSet.CheckDatasetOpen; |
| 1194 |
> |
begin |
| 1195 |
> |
if not FOpen then |
| 1196 |
> |
IBError(ibxeDatasetClosed, [nil]); |
| 1197 |
> |
end; |
| 1198 |
> |
|
| 1199 |
> |
procedure TIBCustomDataSet.CheckNotUniDirectional; |
| 1200 |
> |
begin |
| 1201 |
> |
if UniDirectional then |
| 1202 |
> |
IBError(ibxeDataSetUniDirectional, [nil]); |
| 1203 |
> |
end; |
| 1204 |
> |
|
| 1205 |
> |
procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer); |
| 1206 |
> |
begin |
| 1207 |
> |
with PRecordData(Buffer)^ do |
| 1208 |
> |
if (State = dsInsert) and (not Modified) then |
| 1209 |
> |
begin |
| 1210 |
> |
rdRecordNumber := FRecordCount; |
| 1211 |
> |
FCurrentRecord := FRecordCount; |
| 1212 |
> |
end; |
| 1213 |
> |
end; |
| 1214 |
> |
|
| 1215 |
> |
function TIBCustomDataSet.CanEdit: Boolean; |
| 1216 |
> |
var |
| 1217 |
> |
Buff: PRecordData; |
| 1218 |
> |
begin |
| 1219 |
> |
Buff := PRecordData(GetActiveBuf); |
| 1220 |
> |
result := (FQModify.SQL.Text <> '') or |
| 1221 |
> |
(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or |
| 1222 |
> |
((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and |
| 1223 |
> |
(FCachedUpdates)); |
| 1224 |
> |
end; |
| 1225 |
> |
|
| 1226 |
> |
function TIBCustomDataSet.CanInsert: Boolean; |
| 1227 |
> |
begin |
| 1228 |
> |
result := (FQInsert.SQL.Text <> '') or |
| 1229 |
> |
(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> '')); |
| 1230 |
> |
end; |
| 1231 |
> |
|
| 1232 |
> |
function TIBCustomDataSet.CanDelete: Boolean; |
| 1233 |
> |
begin |
| 1234 |
> |
if (FQDelete.SQL.Text <> '') or |
| 1235 |
> |
(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then |
| 1236 |
> |
result := True |
| 1237 |
> |
else |
| 1238 |
> |
result := False; |
| 1239 |
> |
end; |
| 1240 |
> |
|
| 1241 |
> |
function TIBCustomDataSet.CanRefresh: Boolean; |
| 1242 |
> |
begin |
| 1243 |
> |
result := (FQRefresh.SQL.Text <> '') or |
| 1244 |
> |
(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')); |
| 1245 |
> |
end; |
| 1246 |
> |
|
| 1247 |
> |
procedure TIBCustomDataSet.CheckEditState; |
| 1248 |
> |
begin |
| 1249 |
> |
case State of |
| 1250 |
> |
{ Check all the wsEditMode types } |
| 1251 |
> |
dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter, |
| 1252 |
> |
dsNewValue, dsInternalCalc : |
| 1253 |
> |
begin |
| 1254 |
> |
if (State in [dsEdit]) and (not CanEdit) then |
| 1255 |
> |
IBError(ibxeCannotUpdate, [nil]); |
| 1256 |
> |
if (State in [dsInsert]) and (not CanInsert) then |
| 1257 |
> |
IBError(ibxeCannotInsert, [nil]); |
| 1258 |
> |
end; |
| 1259 |
> |
else |
| 1260 |
> |
IBError(ibxeNotEditing, []) |
| 1261 |
> |
end; |
| 1262 |
> |
end; |
| 1263 |
> |
|
| 1264 |
> |
procedure TIBCustomDataSet.ClearBlobCache; |
| 1265 |
> |
var |
| 1266 |
> |
i: Integer; |
| 1267 |
> |
begin |
| 1268 |
> |
for i := 0 to FBlobStreamList.Count - 1 do |
| 1269 |
> |
begin |
| 1270 |
> |
TIBBlobStream(FBlobStreamList[i]).Free; |
| 1271 |
> |
FBlobStreamList[i] := nil; |
| 1272 |
> |
end; |
| 1273 |
> |
FBlobStreamList.Pack; |
| 1274 |
> |
end; |
| 1275 |
> |
|
| 1276 |
> |
procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer); |
| 1277 |
> |
begin |
| 1278 |
> |
Move(Source^, Dest^, FRecordBufferSize); |
| 1279 |
> |
end; |
| 1280 |
> |
|
| 1281 |
> |
procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject); |
| 1282 |
> |
begin |
| 1283 |
> |
if Active then |
| 1284 |
> |
Active := False; |
| 1285 |
> |
FInternalPrepared := False; |
| 1286 |
> |
if Assigned(FBeforeDatabaseDisconnect) then |
| 1287 |
> |
FBeforeDatabaseDisconnect(Sender); |
| 1288 |
> |
end; |
| 1289 |
> |
|
| 1290 |
> |
procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject); |
| 1291 |
> |
begin |
| 1292 |
> |
if Assigned(FAfterDatabaseDisconnect) then |
| 1293 |
> |
FAfterDatabaseDisconnect(Sender); |
| 1294 |
> |
end; |
| 1295 |
> |
|
| 1296 |
> |
procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject); |
| 1297 |
> |
begin |
| 1298 |
> |
if Assigned(FDatabaseFree) then |
| 1299 |
> |
FDatabaseFree(Sender); |
| 1300 |
> |
end; |
| 1301 |
> |
|
| 1302 |
> |
procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject); |
| 1303 |
> |
begin |
| 1304 |
> |
if Active then |
| 1305 |
> |
Active := False; |
| 1306 |
> |
if FQSelect <> nil then |
| 1307 |
> |
FQSelect.FreeHandle; |
| 1308 |
> |
if FQDelete <> nil then |
| 1309 |
> |
FQDelete.FreeHandle; |
| 1310 |
> |
if FQInsert <> nil then |
| 1311 |
> |
FQInsert.FreeHandle; |
| 1312 |
> |
if FQModify <> nil then |
| 1313 |
> |
FQModify.FreeHandle; |
| 1314 |
> |
if FQRefresh <> nil then |
| 1315 |
> |
FQRefresh.FreeHandle; |
| 1316 |
> |
if Assigned(FBeforeTransactionEnd) then |
| 1317 |
> |
FBeforeTransactionEnd(Sender); |
| 1318 |
> |
end; |
| 1319 |
> |
|
| 1320 |
> |
procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject); |
| 1321 |
> |
begin |
| 1322 |
> |
if Assigned(FAfterTransactionEnd) then |
| 1323 |
> |
FAfterTransactionEnd(Sender); |
| 1324 |
> |
end; |
| 1325 |
> |
|
| 1326 |
> |
procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject); |
| 1327 |
> |
begin |
| 1328 |
> |
if Assigned(FTransactionFree) then |
| 1329 |
> |
FTransactionFree(Sender); |
| 1330 |
> |
end; |
| 1331 |
> |
|
| 1332 |
> |
{ Read the record from FQSelect.Current into the record buffer |
| 1333 |
> |
Then write the buffer to in memory cache } |
| 1334 |
> |
procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL; |
| 1335 |
> |
RecordNumber: Integer; Buffer: PChar); |
| 1336 |
> |
var |
| 1337 |
> |
p: PRecordData; |
| 1338 |
> |
pbd: PBlobDataArray; |
| 1339 |
> |
i, j: Integer; |
| 1340 |
> |
LocalData: Pointer; |
| 1341 |
> |
LocalDate, LocalDouble: Double; |
| 1342 |
> |
LocalInt: Integer; |
| 1343 |
> |
LocalInt64: Int64; |
| 1344 |
> |
LocalCurrency: Currency; |
| 1345 |
> |
FieldsLoaded: Integer; |
| 1346 |
> |
temp: TIBXSQLVAR; |
| 1347 |
> |
begin |
| 1348 |
> |
p := PRecordData(Buffer); |
| 1349 |
> |
{ Make sure blob cache is empty } |
| 1350 |
> |
pbd := PBlobDataArray(Buffer + FBlobCacheOffset); |
| 1351 |
> |
if RecordNumber > -1 then |
| 1352 |
> |
for i := 0 to BlobFieldCount - 1 do |
| 1353 |
> |
pbd^[i] := nil; |
| 1354 |
> |
{ Get record information } |
| 1355 |
> |
p^.rdBookmarkFlag := bfCurrent; |
| 1356 |
> |
p^.rdFieldCount := Qry.Current.Count; |
| 1357 |
> |
p^.rdRecordNumber := RecordNumber; |
| 1358 |
> |
p^.rdUpdateStatus := usUnmodified; |
| 1359 |
> |
p^.rdCachedUpdateStatus := cusUnmodified; |
| 1360 |
> |
p^.rdSavedOffset := $FFFFFFFF; |
| 1361 |
> |
|
| 1362 |
> |
{ Load up the fields } |
| 1363 |
> |
FieldsLoaded := FQSelect.Current.Count; |
| 1364 |
> |
j := 1; |
| 1365 |
> |
for i := 0 to Qry.Current.Count - 1 do |
| 1366 |
> |
begin |
| 1367 |
> |
if (Qry = FQSelect) then |
| 1368 |
> |
j := i + 1 |
| 1369 |
> |
else begin |
| 1370 |
> |
if FieldsLoaded = 0 then |
| 1371 |
> |
break; |
| 1372 |
> |
j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1; |
| 1373 |
> |
if j < 1 then |
| 1374 |
> |
continue |
| 1375 |
> |
else |
| 1376 |
> |
Dec(FieldsLoaded); |
| 1377 |
> |
end; |
| 1378 |
> |
with FQSelect.Current[j - 1].Data^ do |
| 1379 |
> |
if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize} |
| 1380 |
> |
begin |
| 1381 |
> |
if sqllen <= 8 then |
| 1382 |
> |
p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^; |
| 1383 |
> |
continue; |
| 1384 |
> |
end; |
| 1385 |
> |
if j > 0 then with p^ do |
| 1386 |
> |
begin |
| 1387 |
> |
rdFields[j].fdDataType := |
| 1388 |
> |
Qry.Current[i].Data^.sqltype and (not 1); |
| 1389 |
> |
rdFields[j].fdDataScale := |
| 1390 |
> |
Qry.Current[i].Data^.sqlscale; |
| 1391 |
> |
rdFields[j].fdNullable := |
| 1392 |
> |
(Qry.Current[i].Data^.sqltype and 1 = 1); |
| 1393 |
> |
rdFields[j].fdIsNull := |
| 1394 |
> |
(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1)); |
| 1395 |
> |
LocalData := Qry.Current[i].Data^.sqldata; |
| 1396 |
> |
case rdFields[j].fdDataType of |
| 1397 |
> |
SQL_TIMESTAMP: |
| 1398 |
> |
begin |
| 1399 |
> |
rdFields[j].fdDataSize := SizeOf(TDateTime); |
| 1400 |
> |
if RecordNumber >= 0 then |
| 1401 |
> |
LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime)); |
| 1402 |
> |
LocalData := PChar(@LocalDate); |
| 1403 |
> |
end; |
| 1404 |
> |
SQL_TYPE_DATE: |
| 1405 |
> |
begin |
| 1406 |
> |
rdFields[j].fdDataSize := SizeOf(TDateTime); |
| 1407 |
> |
if RecordNumber >= 0 then |
| 1408 |
> |
LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date; |
| 1409 |
> |
LocalData := PChar(@LocalInt); |
| 1410 |
> |
end; |
| 1411 |
> |
SQL_TYPE_TIME: |
| 1412 |
> |
begin |
| 1413 |
> |
rdFields[j].fdDataSize := SizeOf(TDateTime); |
| 1414 |
> |
if RecordNumber >= 0 then |
| 1415 |
> |
LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time; |
| 1416 |
> |
LocalData := PChar(@LocalInt); |
| 1417 |
> |
end; |
| 1418 |
> |
SQL_SHORT, SQL_LONG: |
| 1419 |
> |
begin |
| 1420 |
> |
if (rdFields[j].fdDataScale = 0) then |
| 1421 |
> |
begin |
| 1422 |
> |
rdFields[j].fdDataSize := SizeOf(Integer); |
| 1423 |
> |
if RecordNumber >= 0 then |
| 1424 |
> |
LocalInt := Qry.Current[i].AsLong; |
| 1425 |
> |
LocalData := PChar(@LocalInt); |
| 1426 |
> |
end |
| 1427 |
> |
else if (rdFields[j].fdDataScale >= (-4)) then |
| 1428 |
> |
begin |
| 1429 |
> |
rdFields[j].fdDataSize := SizeOf(Currency); |
| 1430 |
> |
if RecordNumber >= 0 then |
| 1431 |
> |
LocalCurrency := Qry.Current[i].AsCurrency; |
| 1432 |
> |
LocalData := PChar(@LocalCurrency); |
| 1433 |
> |
end |
| 1434 |
> |
else begin |
| 1435 |
> |
rdFields[j].fdDataSize := SizeOf(Double); |
| 1436 |
> |
if RecordNumber >= 0 then |
| 1437 |
> |
LocalDouble := Qry.Current[i].AsDouble; |
| 1438 |
> |
LocalData := PChar(@LocalDouble); |
| 1439 |
> |
end; |
| 1440 |
> |
end; |
| 1441 |
> |
SQL_INT64: |
| 1442 |
> |
begin |
| 1443 |
> |
if (rdFields[j].fdDataScale = 0) then |
| 1444 |
> |
begin |
| 1445 |
> |
rdFields[j].fdDataSize := SizeOf(Int64); |
| 1446 |
> |
if RecordNumber >= 0 then |
| 1447 |
> |
LocalInt64 := Qry.Current[i].AsInt64; |
| 1448 |
> |
LocalData := PChar(@LocalInt64); |
| 1449 |
> |
end |
| 1450 |
> |
else if (rdFields[j].fdDataScale >= (-4)) then |
| 1451 |
> |
begin |
| 1452 |
> |
rdFields[j].fdDataSize := SizeOf(Currency); |
| 1453 |
> |
if RecordNumber >= 0 then |
| 1454 |
> |
LocalCurrency := Qry.Current[i].AsCurrency; |
| 1455 |
> |
LocalData := PChar(@LocalCurrency); |
| 1456 |
> |
end |
| 1457 |
> |
else begin |
| 1458 |
> |
rdFields[j].fdDataSize := SizeOf(Double); |
| 1459 |
> |
if RecordNumber >= 0 then |
| 1460 |
> |
LocalDouble := Qry.Current[i].AsDouble; |
| 1461 |
> |
LocalData := PChar(@LocalDouble); |
| 1462 |
> |
end |
| 1463 |
> |
end; |
| 1464 |
> |
SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: |
| 1465 |
> |
begin |
| 1466 |
> |
rdFields[j].fdDataSize := SizeOf(Double); |
| 1467 |
> |
if RecordNumber >= 0 then |
| 1468 |
> |
LocalDouble := Qry.Current[i].AsDouble; |
| 1469 |
> |
LocalData := PChar(@LocalDouble); |
| 1470 |
> |
end; |
| 1471 |
> |
SQL_VARYING: |
| 1472 |
> |
begin |
| 1473 |
> |
rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen; |
| 1474 |
> |
rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2); |
| 1475 |
> |
if RecordNumber >= 0 then |
| 1476 |
> |
begin |
| 1477 |
> |
if (rdFields[j].fdDataLength = 0) then |
| 1478 |
> |
LocalData := nil |
| 1479 |
> |
else |
| 1480 |
> |
begin |
| 1481 |
> |
temp := Qry.Current[i]; |
| 1482 |
> |
LocalData := @temp.Data^.sqldata[2]; |
| 1483 |
> |
(* LocalData := @Qry.Current[i].Data^.sqldata[2];*) |
| 1484 |
> |
end; |
| 1485 |
> |
end; |
| 1486 |
> |
end; |
| 1487 |
> |
else { SQL_TEXT, SQL_BLOB, SQL_ARRAY, SQL_QUAD } |
| 1488 |
> |
begin |
| 1489 |
> |
rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen; |
| 1490 |
> |
if (rdFields[j].fdDataType = SQL_TEXT) then |
| 1491 |
> |
rdFields[j].fdDataLength := rdFields[j].fdDataSize; |
| 1492 |
> |
end; |
| 1493 |
> |
end; |
| 1494 |
> |
if RecordNumber < 0 then |
| 1495 |
> |
begin |
| 1496 |
> |
rdFields[j].fdIsNull := True; |
| 1497 |
> |
rdFields[j].fdDataOfs := FRecordSize; |
| 1498 |
> |
Inc(FRecordSize, rdFields[j].fdDataSize); |
| 1499 |
> |
end |
| 1500 |
> |
else begin |
| 1501 |
> |
if rdFields[j].fdDataType = SQL_VARYING then |
| 1502 |
> |
begin |
| 1503 |
> |
if LocalData <> nil then |
| 1504 |
> |
Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength) |
| 1505 |
> |
end |
| 1506 |
> |
else |
| 1507 |
> |
Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize) |
| 1508 |
> |
end; |
| 1509 |
> |
end; |
| 1510 |
> |
end; |
| 1511 |
> |
WriteRecordCache(RecordNumber, PChar(p)); |
| 1512 |
> |
end; |
| 1513 |
> |
|
| 1514 |
> |
function TIBCustomDataSet.GetActiveBuf: PChar; |
| 1515 |
> |
begin |
| 1516 |
> |
case State of |
| 1517 |
> |
dsBrowse: |
| 1518 |
> |
if IsEmpty then |
| 1519 |
> |
result := nil |
| 1520 |
> |
else |
| 1521 |
> |
result := ActiveBuffer; |
| 1522 |
> |
dsEdit, dsInsert: |
| 1523 |
> |
result := ActiveBuffer; |
| 1524 |
> |
dsCalcFields: |
| 1525 |
> |
result := CalcBuffer; |
| 1526 |
> |
dsFilter: |
| 1527 |
> |
result := FFilterBuffer; |
| 1528 |
> |
dsNewValue: |
| 1529 |
> |
result := ActiveBuffer; |
| 1530 |
> |
dsOldValue: |
| 1531 |
> |
if (PRecordData(ActiveBuffer)^.rdRecordNumber = |
| 1532 |
> |
PRecordData(FOldBuffer)^.rdRecordNumber) then |
| 1533 |
> |
result := FOldBuffer |
| 1534 |
> |
else |
| 1535 |
> |
result := ActiveBuffer; |
| 1536 |
> |
else if not FOpen then |
| 1537 |
> |
result := nil |
| 1538 |
> |
else |
| 1539 |
> |
result := ActiveBuffer; |
| 1540 |
> |
end; |
| 1541 |
> |
end; |
| 1542 |
> |
|
| 1543 |
> |
function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus; |
| 1544 |
> |
begin |
| 1545 |
> |
if Active then |
| 1546 |
> |
result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus |
| 1547 |
> |
else |
| 1548 |
> |
result := cusUnmodified; |
| 1549 |
> |
end; |
| 1550 |
> |
|
| 1551 |
> |
function TIBCustomDataSet.GetDatabase: TIBDatabase; |
| 1552 |
> |
begin |
| 1553 |
> |
result := FBase.Database; |
| 1554 |
> |
end; |
| 1555 |
> |
|
| 1556 |
> |
function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE; |
| 1557 |
> |
begin |
| 1558 |
> |
result := FBase.DBHandle; |
| 1559 |
> |
end; |
| 1560 |
> |
|
| 1561 |
> |
function TIBCustomDataSet.GetDeleteSQL: TStrings; |
| 1562 |
> |
begin |
| 1563 |
> |
result := FQDelete.SQL; |
| 1564 |
> |
end; |
| 1565 |
> |
|
| 1566 |
> |
function TIBCustomDataSet.GetInsertSQL: TStrings; |
| 1567 |
> |
begin |
| 1568 |
> |
result := FQInsert.SQL; |
| 1569 |
> |
end; |
| 1570 |
> |
|
| 1571 |
> |
function TIBCustomDataSet.GetSQLParams: TIBXSQLDA; |
| 1572 |
> |
begin |
| 1573 |
> |
if not FInternalPrepared then |
| 1574 |
> |
InternalPrepare; |
| 1575 |
> |
result := FQSelect.Params; |
| 1576 |
> |
end; |
| 1577 |
> |
|
| 1578 |
> |
function TIBCustomDataSet.GetRefreshSQL: TStrings; |
| 1579 |
> |
begin |
| 1580 |
> |
result := FQRefresh.SQL; |
| 1581 |
> |
end; |
| 1582 |
> |
|
| 1583 |
> |
function TIBCustomDataSet.GetSelectSQL: TStrings; |
| 1584 |
> |
begin |
| 1585 |
> |
result := FQSelect.SQL; |
| 1586 |
> |
end; |
| 1587 |
> |
|
| 1588 |
> |
function TIBCustomDataSet.GetStatementType: TIBSQLTypes; |
| 1589 |
> |
begin |
| 1590 |
> |
result := FQSelect.SQLType; |
| 1591 |
> |
end; |
| 1592 |
> |
|
| 1593 |
> |
function TIBCustomDataSet.GetModifySQL: TStrings; |
| 1594 |
> |
begin |
| 1595 |
> |
result := FQModify.SQL; |
| 1596 |
> |
end; |
| 1597 |
> |
|
| 1598 |
> |
function TIBCustomDataSet.GetTransaction: TIBTransaction; |
| 1599 |
> |
begin |
| 1600 |
> |
result := FBase.Transaction; |
| 1601 |
> |
end; |
| 1602 |
> |
|
| 1603 |
> |
function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE; |
| 1604 |
> |
begin |
| 1605 |
> |
result := FBase.TRHandle; |
| 1606 |
> |
end; |
| 1607 |
> |
|
| 1608 |
> |
procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); |
| 1609 |
> |
begin |
| 1610 |
> |
if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then |
| 1611 |
> |
FUpdateObject.Apply(ukDelete,Buff) |
| 1612 |
> |
else |
| 1613 |
> |
begin |
| 1614 |
> |
SetInternalSQLParams(FQDelete, Buff); |
| 1615 |
> |
FQDelete.ExecQuery; |
| 1616 |
> |
end; |
| 1617 |
> |
with PRecordData(Buff)^ do |
| 1618 |
> |
begin |
| 1619 |
> |
rdUpdateStatus := usDeleted; |
| 1620 |
> |
rdCachedUpdateStatus := cusUnmodified; |
| 1621 |
> |
end; |
| 1622 |
> |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 1623 |
> |
end; |
| 1624 |
> |
|
| 1625 |
> |
function TIBCustomDataSet.InternalLocate(const KeyFields: string; |
| 1626 |
> |
const KeyValues: Variant; Options: TLocateOptions): Boolean; |
| 1627 |
> |
var |
| 1628 |
> |
keyFieldList: TList; |
| 1629 |
> |
{$IF FPC_FULLVERSION >= 20700 } |
| 1630 |
> |
CurBookmark: TBookmark; |
| 1631 |
> |
{$ELSE} |
| 1632 |
> |
CurBookmark: string; |
| 1633 |
> |
{$ENDIF} |
| 1634 |
> |
fieldValue: Variant; |
| 1635 |
> |
lookupValues: array of variant; |
| 1636 |
> |
i, fieldCount: Integer; |
| 1637 |
> |
fieldValueAsString: string; |
| 1638 |
> |
lookupValueAsString: string; |
| 1639 |
> |
begin |
| 1640 |
> |
keyFieldList := TList.Create; |
| 1641 |
> |
try |
| 1642 |
> |
GetFieldList(keyFieldList, KeyFields); |
| 1643 |
> |
fieldCount := keyFieldList.Count; |
| 1644 |
> |
CurBookmark := Bookmark; |
| 1645 |
> |
result := false; |
| 1646 |
> |
SetLength(lookupValues, fieldCount); |
| 1647 |
> |
if not EOF then |
| 1648 |
> |
begin |
| 1649 |
> |
for i := 0 to fieldCount - 1 do {expand key values into lookupValues array} |
| 1650 |
> |
begin |
| 1651 |
> |
if VarIsArray(KeyValues) then |
| 1652 |
> |
lookupValues[i] := KeyValues[i] |
| 1653 |
> |
else |
| 1654 |
> |
if i > 0 then |
| 1655 |
> |
lookupValues[i] := NULL |
| 1656 |
> |
else |
| 1657 |
> |
lookupValues[0] := KeyValues; |
| 1658 |
> |
|
| 1659 |
> |
{convert to upper case is case insensitive search} |
| 1660 |
> |
if (TField(keyFieldList[i]).DataType = ftString) and |
| 1661 |
> |
not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then |
| 1662 |
> |
lookupValues[i] := UpperCase(lookupValues[i]); |
| 1663 |
> |
end; |
| 1664 |
> |
end; |
| 1665 |
> |
while not result and not EOF do {search for a matching record} |
| 1666 |
> |
begin |
| 1667 |
> |
i := 0; |
| 1668 |
> |
result := true; |
| 1669 |
> |
while result and (i < fieldCount) do |
| 1670 |
> |
{see if all of the key fields matches} |
| 1671 |
> |
begin |
| 1672 |
> |
fieldValue := TField(keyFieldList[i]).Value; |
| 1673 |
> |
result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i])); |
| 1674 |
> |
if result and not VarIsNull(fieldValue) then |
| 1675 |
> |
begin |
| 1676 |
> |
try |
| 1677 |
> |
if TField(keyFieldList[i]).DataType = ftString then |
| 1678 |
> |
begin |
| 1679 |
> |
{strings need special handling because of the locate options that |
| 1680 |
> |
apply to them} |
| 1681 |
> |
fieldValueAsString := TField(keyFieldList[i]).AsString; |
| 1682 |
> |
lookupValueAsString := lookupValues[i]; |
| 1683 |
> |
if (loCaseInsensitive in Options) then |
| 1684 |
> |
fieldValueAsString := UpperCase(fieldValueAsString); |
| 1685 |
> |
|
| 1686 |
> |
if (loPartialKey in Options) then |
| 1687 |
> |
result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1) |
| 1688 |
> |
else |
| 1689 |
> |
result := result and (fieldValueAsString = lookupValueAsString); |
| 1690 |
> |
end |
| 1691 |
> |
else |
| 1692 |
> |
result := result and (lookupValues[i] = |
| 1693 |
> |
VarAsType(fieldValue, VarType(lookupValues[i]))); |
| 1694 |
> |
except on EVariantError do |
| 1695 |
> |
result := False; |
| 1696 |
> |
end; |
| 1697 |
> |
end; |
| 1698 |
> |
Inc(i); |
| 1699 |
> |
end; |
| 1700 |
> |
if not result then |
| 1701 |
> |
Next; |
| 1702 |
> |
end; |
| 1703 |
> |
if not result then |
| 1704 |
> |
Bookmark := CurBookmark |
| 1705 |
> |
else |
| 1706 |
> |
CursorPosChanged; |
| 1707 |
> |
finally |
| 1708 |
> |
keyFieldList.Free; |
| 1709 |
> |
SetLength(lookupValues,0) |
| 1710 |
> |
end; |
| 1711 |
> |
end; |
| 1712 |
> |
|
| 1713 |
> |
procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer); |
| 1714 |
> |
var |
| 1715 |
> |
i, j, k: Integer; |
| 1716 |
> |
pbd: PBlobDataArray; |
| 1717 |
> |
begin |
| 1718 |
> |
pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset); |
| 1719 |
> |
j := 0; |
| 1720 |
> |
for i := 0 to FieldCount - 1 do |
| 1721 |
> |
if Fields[i].IsBlob then |
| 1722 |
> |
begin |
| 1723 |
> |
k := FMappedFieldPosition[Fields[i].FieldNo -1]; |
| 1724 |
> |
if pbd^[j] <> nil then |
| 1725 |
> |
begin |
| 1726 |
> |
pbd^[j].Finalize; |
| 1727 |
> |
PISC_QUAD( |
| 1728 |
> |
PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ := |
| 1729 |
> |
pbd^[j].BlobID; |
| 1730 |
> |
PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0; |
| 1731 |
> |
end; |
| 1732 |
> |
Inc(j); |
| 1733 |
> |
end; |
| 1734 |
> |
if Assigned(FUpdateObject) then |
| 1735 |
> |
begin |
| 1736 |
> |
if (Qry = FQDelete) then |
| 1737 |
> |
FUpdateObject.Apply(ukDelete,Buff) |
| 1738 |
> |
else if (Qry = FQInsert) then |
| 1739 |
> |
FUpdateObject.Apply(ukInsert,Buff) |
| 1740 |
> |
else |
| 1741 |
> |
FUpdateObject.Apply(ukModify,Buff); |
| 1742 |
> |
end |
| 1743 |
> |
else begin |
| 1744 |
> |
SetInternalSQLParams(Qry, Buff); |
| 1745 |
> |
Qry.ExecQuery; |
| 1746 |
> |
end; |
| 1747 |
> |
PRecordData(Buff)^.rdUpdateStatus := usUnmodified; |
| 1748 |
> |
PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified; |
| 1749 |
> |
SetModified(False); |
| 1750 |
> |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 1751 |
> |
if (FForcedRefresh or FNeedsRefresh) and CanRefresh then |
| 1752 |
> |
InternalRefreshRow; |
| 1753 |
> |
end; |
| 1754 |
> |
|
| 1755 |
> |
procedure TIBCustomDataSet.InternalRefreshRow; |
| 1756 |
> |
var |
| 1757 |
> |
Buff: PChar; |
| 1758 |
> |
SetCursor: Boolean; |
| 1759 |
> |
ofs: DWORD; |
| 1760 |
> |
Qry: TIBSQL; |
| 1761 |
> |
begin |
| 1762 |
> |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 1763 |
> |
if SetCursor then |
| 1764 |
> |
Screen.Cursor := crHourGlass; |
| 1765 |
> |
try |
| 1766 |
> |
Buff := GetActiveBuf; |
| 1767 |
> |
if CanRefresh then |
| 1768 |
> |
begin |
| 1769 |
> |
if Buff <> nil then |
| 1770 |
> |
begin |
| 1771 |
> |
if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then |
| 1772 |
> |
begin |
| 1773 |
> |
Qry := TIBSQL.Create(self); |
| 1774 |
> |
Qry.Database := Database; |
| 1775 |
> |
Qry.Transaction := Transaction; |
| 1776 |
> |
Qry.GoToFirstRecordOnExecute := False; |
| 1777 |
> |
Qry.SQL.Text := FUpdateObject.RefreshSQL.Text; |
| 1778 |
> |
end |
| 1779 |
> |
else |
| 1780 |
> |
Qry := FQRefresh; |
| 1781 |
> |
SetInternalSQLParams(Qry, Buff); |
| 1782 |
> |
Qry.ExecQuery; |
| 1783 |
> |
try |
| 1784 |
> |
if (Qry.SQLType = SQLExecProcedure) or |
| 1785 |
> |
(Qry.Next <> nil) then |
| 1786 |
> |
begin |
| 1787 |
> |
ofs := PRecordData(Buff)^.rdSavedOffset; |
| 1788 |
> |
FetchCurrentRecordToBuffer(Qry, |
| 1789 |
> |
PRecordData(Buff)^.rdRecordNumber, |
| 1790 |
> |
Buff); |
| 1791 |
> |
if FCachedUpdates and (ofs <> $FFFFFFFF) then |
| 1792 |
> |
begin |
| 1793 |
> |
PRecordData(Buff)^.rdSavedOffset := ofs; |
| 1794 |
> |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 1795 |
> |
SaveOldBuffer(Buff); |
| 1796 |
> |
end; |
| 1797 |
> |
end; |
| 1798 |
> |
finally |
| 1799 |
> |
Qry.Close; |
| 1800 |
> |
end; |
| 1801 |
> |
if Qry <> FQRefresh then |
| 1802 |
> |
Qry.Free; |
| 1803 |
> |
end |
| 1804 |
> |
end |
| 1805 |
> |
else |
| 1806 |
> |
IBError(ibxeCannotRefresh, [nil]); |
| 1807 |
> |
finally |
| 1808 |
> |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 1809 |
> |
Screen.Cursor := crDefault; |
| 1810 |
> |
end; |
| 1811 |
> |
end; |
| 1812 |
> |
|
| 1813 |
> |
procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer); |
| 1814 |
> |
var |
| 1815 |
> |
NewBuffer, OldBuffer: PRecordData; |
| 1816 |
> |
|
| 1817 |
> |
begin |
| 1818 |
> |
NewBuffer := nil; |
| 1819 |
> |
OldBuffer := nil; |
| 1820 |
> |
NewBuffer := PRecordData(AllocRecordBuffer); |
| 1821 |
> |
OldBuffer := PRecordData(AllocRecordBuffer); |
| 1822 |
> |
try |
| 1823 |
> |
ReadRecordCache(RecordNumber, PChar(NewBuffer), False); |
| 1824 |
> |
ReadRecordCache(RecordNumber, PChar(OldBuffer), True); |
| 1825 |
> |
case NewBuffer^.rdCachedUpdateStatus of |
| 1826 |
> |
cusInserted: |
| 1827 |
> |
begin |
| 1828 |
> |
NewBuffer^.rdCachedUpdateStatus := cusUninserted; |
| 1829 |
> |
Inc(FDeletedRecords); |
| 1830 |
> |
end; |
| 1831 |
> |
cusModified, |
| 1832 |
> |
cusDeleted: |
| 1833 |
> |
begin |
| 1834 |
> |
if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then |
| 1835 |
> |
Dec(FDeletedRecords); |
| 1836 |
> |
CopyRecordBuffer(OldBuffer, NewBuffer); |
| 1837 |
> |
end; |
| 1838 |
> |
end; |
| 1839 |
> |
|
| 1840 |
> |
if State in dsEditModes then |
| 1841 |
> |
Cancel; |
| 1842 |
> |
|
| 1843 |
> |
WriteRecordCache(RecordNumber, PChar(NewBuffer)); |
| 1844 |
> |
|
| 1845 |
> |
if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then |
| 1846 |
> |
ReSync([]); |
| 1847 |
> |
finally |
| 1848 |
> |
FreeRecordBuffer(PChar(NewBuffer)); |
| 1849 |
> |
FreeRecordBuffer(PChar(OldBuffer)); |
| 1850 |
> |
end; |
| 1851 |
> |
end; |
| 1852 |
> |
|
| 1853 |
> |
{ A visible record is one that is not truly deleted, |
| 1854 |
> |
and it is also listed in the FUpdateRecordTypes set } |
| 1855 |
> |
|
| 1856 |
> |
function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean; |
| 1857 |
> |
begin |
| 1858 |
> |
result := True; |
| 1859 |
> |
if not (State = dsOldValue) then |
| 1860 |
> |
result := |
| 1861 |
> |
(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and |
| 1862 |
> |
(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and |
| 1863 |
> |
(PRecordData(Buffer)^.rdUpdateStatus = usDeleted))); |
| 1864 |
> |
end; |
| 1865 |
> |
|
| 1866 |
> |
|
| 1867 |
> |
function TIBCustomDataSet.LocateNext(const KeyFields: string; |
| 1868 |
> |
const KeyValues: Variant; Options: TLocateOptions): Boolean; |
| 1869 |
> |
begin |
| 1870 |
> |
DisableControls; |
| 1871 |
> |
try |
| 1872 |
> |
result := InternalLocate(KeyFields, KeyValues, Options); |
| 1873 |
> |
finally |
| 1874 |
> |
EnableControls; |
| 1875 |
> |
end; |
| 1876 |
> |
end; |
| 1877 |
> |
|
| 1878 |
> |
procedure TIBCustomDataSet.InternalPrepare; |
| 1879 |
> |
var |
| 1880 |
> |
SetCursor: Boolean; |
| 1881 |
> |
DidActivate: Boolean; |
| 1882 |
> |
begin |
| 1883 |
> |
if FInternalPrepared then |
| 1884 |
> |
Exit; |
| 1885 |
> |
DidActivate := False; |
| 1886 |
> |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 1887 |
> |
if SetCursor then |
| 1888 |
> |
Screen.Cursor := crHourGlass; |
| 1889 |
> |
try |
| 1890 |
> |
ActivateConnection; |
| 1891 |
> |
DidActivate := ActivateTransaction; |
| 1892 |
> |
FBase.CheckDatabase; |
| 1893 |
> |
FBase.CheckTransaction; |
| 1894 |
> |
if FQSelect.SQL.Text <> '' then |
| 1895 |
> |
begin |
| 1896 |
> |
if not FQSelect.Prepared then |
| 1897 |
> |
begin |
| 1898 |
> |
FQSelect.ParamCheck := ParamCheck; |
| 1899 |
> |
FQSelect.Prepare; |
| 1900 |
> |
end; |
| 1901 |
> |
if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then |
| 1902 |
> |
FQDelete.Prepare; |
| 1903 |
> |
if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then |
| 1904 |
> |
FQInsert.Prepare; |
| 1905 |
> |
if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then |
| 1906 |
> |
FQRefresh.Prepare; |
| 1907 |
> |
if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then |
| 1908 |
> |
FQModify.Prepare; |
| 1909 |
> |
FInternalPrepared := True; |
| 1910 |
> |
InternalInitFieldDefs; |
| 1911 |
> |
end else |
| 1912 |
> |
IBError(ibxeEmptyQuery, [nil]); |
| 1913 |
> |
finally |
| 1914 |
> |
if DidActivate then |
| 1915 |
> |
DeactivateTransaction; |
| 1916 |
> |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 1917 |
> |
Screen.Cursor := crDefault; |
| 1918 |
> |
end; |
| 1919 |
> |
end; |
| 1920 |
> |
|
| 1921 |
> |
procedure TIBCustomDataSet.RecordModified(Value: Boolean); |
| 1922 |
> |
begin |
| 1923 |
> |
SetModified(Value); |
| 1924 |
> |
end; |
| 1925 |
> |
|
| 1926 |
> |
procedure TIBCustomDataSet.RevertRecord; |
| 1927 |
> |
var |
| 1928 |
> |
Buff: PRecordData; |
| 1929 |
> |
begin |
| 1930 |
> |
if FCachedUpdates and FUpdatesPending then |
| 1931 |
> |
begin |
| 1932 |
> |
Buff := PRecordData(GetActiveBuf); |
| 1933 |
> |
InternalRevertRecord(Buff^.rdRecordNumber); |
| 1934 |
> |
ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False); |
| 1935 |
> |
DataEvent(deRecordChange, 0); |
| 1936 |
> |
end; |
| 1937 |
> |
end; |
| 1938 |
> |
|
| 1939 |
> |
procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar); |
| 1940 |
> |
var |
| 1941 |
> |
OldBuffer: Pointer; |
| 1942 |
> |
procedure CopyOldBuffer; |
| 1943 |
> |
begin |
| 1944 |
> |
CopyRecordBuffer(Buffer, OldBuffer); |
| 1945 |
> |
if BlobFieldCount > 0 then |
| 1946 |
> |
FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream), |
| 1947 |
> |
0); |
| 1948 |
> |
end; |
| 1949 |
> |
|
| 1950 |
> |
begin |
| 1951 |
> |
if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then |
| 1952 |
> |
begin |
| 1953 |
> |
OldBuffer := AllocRecordBuffer; |
| 1954 |
> |
try |
| 1955 |
> |
if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then |
| 1956 |
> |
begin |
| 1957 |
> |
PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0, |
| 1958 |
> |
FILE_END); |
| 1959 |
> |
CopyOldBuffer; |
| 1960 |
> |
WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer); |
| 1961 |
> |
WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize, |
| 1962 |
> |
FILE_BEGIN, Buffer); |
| 1963 |
> |
end |
| 1964 |
> |
else begin |
| 1965 |
> |
CopyOldBuffer; |
| 1966 |
> |
WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN, |
| 1967 |
> |
OldBuffer); |
| 1968 |
> |
end; |
| 1969 |
> |
finally |
| 1970 |
> |
FreeRecordBuffer(PChar(OldBuffer)); |
| 1971 |
> |
end; |
| 1972 |
> |
end; |
| 1973 |
> |
end; |
| 1974 |
> |
|
| 1975 |
> |
procedure TIBCustomDataSet.SetBufferChunks(Value: Integer); |
| 1976 |
> |
begin |
| 1977 |
> |
if (Value <= 0) then |
| 1978 |
> |
FBufferChunks := BufferCacheSize |
| 1979 |
> |
else |
| 1980 |
> |
FBufferChunks := Value; |
| 1981 |
> |
end; |
| 1982 |
> |
|
| 1983 |
> |
procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase); |
| 1984 |
> |
begin |
| 1985 |
> |
if (FBase.Database <> Value) then |
| 1986 |
> |
begin |
| 1987 |
> |
CheckDatasetClosed; |
| 1988 |
> |
FBase.Database := Value; |
| 1989 |
> |
FQDelete.Database := Value; |
| 1990 |
> |
FQInsert.Database := Value; |
| 1991 |
> |
FQRefresh.Database := Value; |
| 1992 |
> |
FQSelect.Database := Value; |
| 1993 |
> |
FQModify.Database := Value; |
| 1994 |
> |
end; |
| 1995 |
> |
end; |
| 1996 |
> |
|
| 1997 |
> |
procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings); |
| 1998 |
> |
begin |
| 1999 |
> |
if FQDelete.SQL.Text <> Value.Text then |
| 2000 |
> |
begin |
| 2001 |
> |
Disconnect; |
| 2002 |
> |
FQDelete.SQL.Assign(Value); |
| 2003 |
> |
end; |
| 2004 |
> |
end; |
| 2005 |
> |
|
| 2006 |
> |
procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings); |
| 2007 |
> |
begin |
| 2008 |
> |
if FQInsert.SQL.Text <> Value.Text then |
| 2009 |
> |
begin |
| 2010 |
> |
Disconnect; |
| 2011 |
> |
FQInsert.SQL.Assign(Value); |
| 2012 |
> |
end; |
| 2013 |
> |
end; |
| 2014 |
> |
|
| 2015 |
> |
procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer); |
| 2016 |
> |
var |
| 2017 |
> |
i, j: Integer; |
| 2018 |
> |
cr, data: PChar; |
| 2019 |
> |
fn, st: string; |
| 2020 |
> |
OldBuffer: Pointer; |
| 2021 |
> |
ts: TTimeStamp; |
| 2022 |
> |
begin |
| 2023 |
> |
if (Buffer = nil) then |
| 2024 |
> |
IBError(ibxeBufferNotSet, [nil]); |
| 2025 |
> |
if (not FInternalPrepared) then |
| 2026 |
> |
InternalPrepare; |
| 2027 |
> |
OldBuffer := nil; |
| 2028 |
> |
try |
| 2029 |
> |
for i := 0 to Qry.Params.Count - 1 do |
| 2030 |
> |
begin |
| 2031 |
> |
fn := Qry.Params[i].Name; |
| 2032 |
> |
if (Pos('OLD_', fn) = 1) then {mbcs ok} |
| 2033 |
> |
begin |
| 2034 |
> |
fn := Copy(fn, 5, Length(fn)); |
| 2035 |
> |
if not Assigned(OldBuffer) then |
| 2036 |
> |
begin |
| 2037 |
> |
OldBuffer := AllocRecordBuffer; |
| 2038 |
> |
ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True); |
| 2039 |
> |
end; |
| 2040 |
> |
cr := OldBuffer; |
| 2041 |
> |
end |
| 2042 |
> |
else if (Pos('NEW_', fn) = 1) then {mbcs ok} |
| 2043 |
> |
begin |
| 2044 |
> |
fn := Copy(fn, 5, Length(fn)); |
| 2045 |
> |
cr := Buffer; |
| 2046 |
> |
end |
| 2047 |
> |
else |
| 2048 |
> |
cr := Buffer; |
| 2049 |
> |
j := FQSelect.FieldIndex[fn] + 1; |
| 2050 |
> |
if (j > 0) then |
| 2051 |
> |
with PRecordData(cr)^ do |
| 2052 |
> |
begin |
| 2053 |
> |
if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize} |
| 2054 |
> |
begin |
| 2055 |
> |
PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey; |
| 2056 |
> |
continue; |
| 2057 |
> |
end; |
| 2058 |
> |
if rdFields[j].fdIsNull then |
| 2059 |
> |
Qry.Params[i].IsNull := True |
| 2060 |
> |
else begin |
| 2061 |
> |
Qry.Params[i].IsNull := False; |
| 2062 |
> |
data := cr + rdFields[j].fdDataOfs; |
| 2063 |
> |
case rdFields[j].fdDataType of |
| 2064 |
> |
SQL_TEXT, SQL_VARYING: |
| 2065 |
> |
begin |
| 2066 |
> |
SetString(st, data, rdFields[j].fdDataLength); |
| 2067 |
> |
Qry.Params[i].AsString := st; |
| 2068 |
> |
end; |
| 2069 |
> |
SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT: |
| 2070 |
> |
Qry.Params[i].AsDouble := PDouble(data)^; |
| 2071 |
> |
SQL_SHORT, SQL_LONG: |
| 2072 |
> |
begin |
| 2073 |
> |
if rdFields[j].fdDataScale = 0 then |
| 2074 |
> |
Qry.Params[i].AsLong := PLong(data)^ |
| 2075 |
> |
else if rdFields[j].fdDataScale >= (-4) then |
| 2076 |
> |
Qry.Params[i].AsCurrency := PCurrency(data)^ |
| 2077 |
> |
else |
| 2078 |
> |
Qry.Params[i].AsDouble := PDouble(data)^; |
| 2079 |
> |
end; |
| 2080 |
> |
SQL_INT64: |
| 2081 |
> |
begin |
| 2082 |
> |
if rdFields[j].fdDataScale = 0 then |
| 2083 |
> |
Qry.Params[i].AsInt64 := PInt64(data)^ |
| 2084 |
> |
else if rdFields[j].fdDataScale >= (-4) then |
| 2085 |
> |
Qry.Params[i].AsCurrency := PCurrency(data)^ |
| 2086 |
> |
else |
| 2087 |
> |
Qry.Params[i].AsDouble := PDouble(data)^; |
| 2088 |
> |
end; |
| 2089 |
> |
SQL_BLOB, SQL_ARRAY, SQL_QUAD: |
| 2090 |
> |
Qry.Params[i].AsQuad := PISC_QUAD(data)^; |
| 2091 |
> |
SQL_TYPE_DATE: |
| 2092 |
> |
begin |
| 2093 |
> |
ts.Date := PInt(data)^; |
| 2094 |
> |
ts.Time := 0; |
| 2095 |
> |
Qry.Params[i].AsDate := |
| 2096 |
> |
TimeStampToDateTime(ts); |
| 2097 |
> |
end; |
| 2098 |
> |
SQL_TYPE_TIME: |
| 2099 |
> |
begin |
| 2100 |
> |
ts.Date := 0; |
| 2101 |
> |
ts.Time := PInt(data)^; |
| 2102 |
> |
Qry.Params[i].AsTime := |
| 2103 |
> |
TimeStampToDateTime(ts); |
| 2104 |
> |
end; |
| 2105 |
> |
SQL_TIMESTAMP: |
| 2106 |
> |
Qry.Params[i].AsDateTime := |
| 2107 |
> |
TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^))); |
| 2108 |
> |
end; |
| 2109 |
> |
end; |
| 2110 |
> |
end; |
| 2111 |
> |
end; |
| 2112 |
> |
finally |
| 2113 |
> |
if (OldBuffer <> nil) then |
| 2114 |
> |
FreeRecordBuffer(PChar(OldBuffer)); |
| 2115 |
> |
end; |
| 2116 |
> |
end; |
| 2117 |
> |
|
| 2118 |
> |
procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings); |
| 2119 |
> |
begin |
| 2120 |
> |
if FQRefresh.SQL.Text <> Value.Text then |
| 2121 |
> |
begin |
| 2122 |
> |
Disconnect; |
| 2123 |
> |
FQRefresh.SQL.Assign(Value); |
| 2124 |
> |
end; |
| 2125 |
> |
end; |
| 2126 |
> |
|
| 2127 |
> |
procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings); |
| 2128 |
> |
begin |
| 2129 |
> |
if FQSelect.SQL.Text <> Value.Text then |
| 2130 |
> |
begin |
| 2131 |
> |
Disconnect; |
| 2132 |
> |
FQSelect.SQL.Assign(Value); |
| 2133 |
> |
end; |
| 2134 |
> |
end; |
| 2135 |
> |
|
| 2136 |
> |
procedure TIBCustomDataSet.SetModifySQL(Value: TStrings); |
| 2137 |
> |
begin |
| 2138 |
> |
if FQModify.SQL.Text <> Value.Text then |
| 2139 |
> |
begin |
| 2140 |
> |
Disconnect; |
| 2141 |
> |
FQModify.SQL.Assign(Value); |
| 2142 |
> |
end; |
| 2143 |
> |
end; |
| 2144 |
> |
|
| 2145 |
> |
procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction); |
| 2146 |
> |
begin |
| 2147 |
> |
if (FBase.Transaction <> Value) then |
| 2148 |
> |
begin |
| 2149 |
> |
CheckDatasetClosed; |
| 2150 |
> |
FBase.Transaction := Value; |
| 2151 |
> |
FQDelete.Transaction := Value; |
| 2152 |
> |
FQInsert.Transaction := Value; |
| 2153 |
> |
FQRefresh.Transaction := Value; |
| 2154 |
> |
FQSelect.Transaction := Value; |
| 2155 |
> |
FQModify.Transaction := Value; |
| 2156 |
> |
end; |
| 2157 |
> |
end; |
| 2158 |
> |
|
| 2159 |
> |
procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean); |
| 2160 |
> |
begin |
| 2161 |
> |
CheckDatasetClosed; |
| 2162 |
> |
FUniDirectional := Value; |
| 2163 |
> |
end; |
| 2164 |
> |
|
| 2165 |
> |
procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes); |
| 2166 |
> |
begin |
| 2167 |
> |
FUpdateRecordTypes := Value; |
| 2168 |
> |
if Active then |
| 2169 |
> |
First; |
| 2170 |
> |
end; |
| 2171 |
> |
|
| 2172 |
> |
procedure TIBCustomDataSet.RefreshParams; |
| 2173 |
> |
var |
| 2174 |
> |
DataSet: TDataSet; |
| 2175 |
> |
begin |
| 2176 |
> |
DisableControls; |
| 2177 |
> |
try |
| 2178 |
> |
if FDataLink.DataSource <> nil then |
| 2179 |
> |
begin |
| 2180 |
> |
DataSet := FDataLink.DataSource.DataSet; |
| 2181 |
> |
if DataSet <> nil then |
| 2182 |
> |
if DataSet.Active and (DataSet.State <> dsSetKey) then |
| 2183 |
> |
begin |
| 2184 |
> |
Close; |
| 2185 |
> |
Open; |
| 2186 |
> |
end; |
| 2187 |
> |
end; |
| 2188 |
> |
finally |
| 2189 |
> |
EnableControls; |
| 2190 |
> |
end; |
| 2191 |
> |
end; |
| 2192 |
> |
|
| 2193 |
> |
|
| 2194 |
> |
procedure TIBCustomDataSet.SQLChanging(Sender: TObject); |
| 2195 |
> |
begin |
| 2196 |
> |
if FOpen then |
| 2197 |
> |
InternalClose; |
| 2198 |
> |
if FInternalPrepared then |
| 2199 |
> |
InternalUnPrepare; |
| 2200 |
> |
end; |
| 2201 |
> |
|
| 2202 |
> |
{ I can "undelete" uninserted records (make them "inserted" again). |
| 2203 |
> |
I can "undelete" cached deleted (the deletion hasn't yet occurred) } |
| 2204 |
> |
procedure TIBCustomDataSet.Undelete; |
| 2205 |
> |
var |
| 2206 |
> |
Buff: PRecordData; |
| 2207 |
> |
begin |
| 2208 |
> |
CheckActive; |
| 2209 |
> |
Buff := PRecordData(GetActiveBuf); |
| 2210 |
> |
with Buff^ do |
| 2211 |
> |
begin |
| 2212 |
> |
if rdCachedUpdateStatus = cusUninserted then |
| 2213 |
> |
begin |
| 2214 |
> |
rdCachedUpdateStatus := cusInserted; |
| 2215 |
> |
Dec(FDeletedRecords); |
| 2216 |
> |
end |
| 2217 |
> |
else if (rdUpdateStatus = usDeleted) and |
| 2218 |
> |
(rdCachedUpdateStatus = cusDeleted) then |
| 2219 |
> |
begin |
| 2220 |
> |
rdCachedUpdateStatus := cusUnmodified; |
| 2221 |
> |
rdUpdateStatus := usUnmodified; |
| 2222 |
> |
Dec(FDeletedRecords); |
| 2223 |
> |
end; |
| 2224 |
> |
WriteRecordCache(rdRecordNumber, PChar(Buff)); |
| 2225 |
> |
end; |
| 2226 |
> |
end; |
| 2227 |
> |
|
| 2228 |
> |
function TIBCustomDataSet.UpdateStatus: TUpdateStatus; |
| 2229 |
> |
begin |
| 2230 |
> |
if Active then |
| 2231 |
> |
if GetActiveBuf <> nil then |
| 2232 |
> |
result := PRecordData(GetActiveBuf)^.rdUpdateStatus |
| 2233 |
> |
else |
| 2234 |
> |
result := usUnmodified |
| 2235 |
> |
else |
| 2236 |
> |
result := usUnmodified; |
| 2237 |
> |
end; |
| 2238 |
> |
|
| 2239 |
> |
function TIBCustomDataSet.IsSequenced: Boolean; |
| 2240 |
> |
begin |
| 2241 |
> |
Result := Assigned( FQSelect ) and FQSelect.EOF; |
| 2242 |
> |
end; |
| 2243 |
> |
|
| 2244 |
> |
function TIBCustomDataSet.ParamByName(ParamName: String): TIBXSQLVAR; |
| 2245 |
> |
begin |
| 2246 |
> |
ActivateConnection; |
| 2247 |
> |
ActivateTransaction; |
| 2248 |
> |
if not FInternalPrepared then |
| 2249 |
> |
InternalPrepare; |
| 2250 |
> |
Result := Params.ByName(ParamName); |
| 2251 |
> |
end; |
| 2252 |
> |
|
| 2253 |
> |
{Beware: the parameter FCache is used as an identifier to determine which |
| 2254 |
> |
cache is being operated on and is not referenced in the computation. |
| 2255 |
> |
The result is an adjusted offset into the identified cache, either the |
| 2256 |
> |
Buffer Cache or the old Buffer Cache.} |
| 2257 |
> |
|
| 2258 |
> |
function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD; |
| 2259 |
> |
Origin: Integer): DWORD; |
| 2260 |
> |
var |
| 2261 |
> |
OldCacheSize: Integer; |
| 2262 |
> |
begin |
| 2263 |
> |
if (FCache = FBufferCache) then |
| 2264 |
> |
begin |
| 2265 |
> |
case Origin of |
| 2266 |
> |
FILE_BEGIN: FBPos := Offset; |
| 2267 |
> |
FILE_CURRENT: FBPos := FBPos + Offset; |
| 2268 |
> |
FILE_END: FBPos := DWORD(FBEnd) + Offset; |
| 2269 |
> |
end; |
| 2270 |
> |
OldCacheSize := FCacheSize; |
| 2271 |
> |
while (FBPos >= DWORD(FCacheSize)) do |
| 2272 |
> |
Inc(FCacheSize, FBufferChunkSize); |
| 2273 |
> |
if FCacheSize > OldCacheSize then |
| 2274 |
> |
IBAlloc(FBufferCache, FCacheSize, FCacheSize); |
| 2275 |
> |
result := FBPos; |
| 2276 |
> |
end |
| 2277 |
> |
else begin |
| 2278 |
> |
case Origin of |
| 2279 |
> |
FILE_BEGIN: FOBPos := Offset; |
| 2280 |
> |
FILE_CURRENT: FOBPos := FOBPos + Offset; |
| 2281 |
> |
FILE_END: FOBPos := DWORD(FOBEnd) + Offset; |
| 2282 |
> |
end; |
| 2283 |
> |
OldCacheSize := FOldCacheSize; |
| 2284 |
> |
while (FBPos >= DWORD(FOldCacheSize)) do |
| 2285 |
> |
Inc(FOldCacheSize, FBufferChunkSize); |
| 2286 |
> |
if FOldCacheSize > OldCacheSize then |
| 2287 |
> |
IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize); |
| 2288 |
> |
result := FOBPos; |
| 2289 |
> |
end; |
| 2290 |
> |
end; |
| 2291 |
> |
|
| 2292 |
> |
procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer; |
| 2293 |
> |
Buffer: PChar); |
| 2294 |
> |
var |
| 2295 |
> |
pCache: PChar; |
| 2296 |
> |
AdjustedOffset: DWORD; |
| 2297 |
> |
bOld: Boolean; |
| 2298 |
> |
begin |
| 2299 |
> |
bOld := (FCache = FOldBufferCache); |
| 2300 |
> |
AdjustedOffset := AdjustPosition(FCache, Offset, Origin); |
| 2301 |
> |
if not bOld then |
| 2302 |
> |
pCache := FBufferCache + AdjustedOffset |
| 2303 |
> |
else |
| 2304 |
> |
pCache := FOldBufferCache + AdjustedOffset; |
| 2305 |
> |
Move(pCache^, Buffer^, DWORD(FRecordBufferSize)); |
| 2306 |
> |
AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT); |
| 2307 |
> |
end; |
| 2308 |
> |
|
| 2309 |
> |
procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar; |
| 2310 |
> |
ReadOldBuffer: Boolean); |
| 2311 |
> |
begin |
| 2312 |
> |
if FUniDirectional then |
| 2313 |
> |
RecordNumber := RecordNumber mod UniCache; |
| 2314 |
> |
if (ReadOldBuffer) then |
| 2315 |
> |
begin |
| 2316 |
> |
ReadRecordCache(RecordNumber, Buffer, False); |
| 2317 |
> |
if FCachedUpdates and |
| 2318 |
> |
(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then |
| 2319 |
> |
ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN, |
| 2320 |
> |
Buffer) |
| 2321 |
> |
else |
| 2322 |
> |
if ReadOldBuffer and |
| 2323 |
> |
(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then |
| 2324 |
> |
CopyRecordBuffer( FOldBuffer, Buffer ) |
| 2325 |
> |
end |
| 2326 |
> |
else |
| 2327 |
> |
ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer); |
| 2328 |
> |
end; |
| 2329 |
> |
|
| 2330 |
> |
procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer; |
| 2331 |
> |
Buffer: PChar); |
| 2332 |
> |
var |
| 2333 |
> |
pCache: PChar; |
| 2334 |
> |
AdjustedOffset: DWORD; |
| 2335 |
> |
bOld: Boolean; |
| 2336 |
> |
dwEnd: DWORD; |
| 2337 |
> |
begin |
| 2338 |
> |
bOld := (FCache = FOldBufferCache); |
| 2339 |
> |
AdjustedOffset := AdjustPosition(FCache, Offset, Origin); |
| 2340 |
> |
if not bOld then |
| 2341 |
> |
pCache := FBufferCache + AdjustedOffset |
| 2342 |
> |
else |
| 2343 |
> |
pCache := FOldBufferCache + AdjustedOffset; |
| 2344 |
> |
Move(Buffer^, pCache^, FRecordBufferSize); |
| 2345 |
> |
dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT); |
| 2346 |
> |
if not bOld then |
| 2347 |
> |
begin |
| 2348 |
> |
if (dwEnd > FBEnd) then |
| 2349 |
> |
FBEnd := dwEnd; |
| 2350 |
> |
end |
| 2351 |
> |
else begin |
| 2352 |
> |
if (dwEnd > FOBEnd) then |
| 2353 |
> |
FOBEnd := dwEnd; |
| 2354 |
> |
end; |
| 2355 |
> |
end; |
| 2356 |
> |
|
| 2357 |
> |
procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar); |
| 2358 |
> |
begin |
| 2359 |
> |
if RecordNumber >= 0 then |
| 2360 |
> |
begin |
| 2361 |
> |
if FUniDirectional then |
| 2362 |
> |
RecordNumber := RecordNumber mod UniCache; |
| 2363 |
> |
WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer); |
| 2364 |
> |
end; |
| 2365 |
> |
end; |
| 2366 |
> |
|
| 2367 |
> |
function TIBCustomDataSet.AllocRecordBuffer: PChar; |
| 2368 |
> |
begin |
| 2369 |
> |
result := nil; |
| 2370 |
> |
IBAlloc(result, FRecordBufferSize, FRecordBufferSize); |
| 2371 |
> |
Move(FModelBuffer^, result^, FRecordBufferSize); |
| 2372 |
> |
end; |
| 2373 |
> |
|
| 2374 |
> |
function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; |
| 2375 |
> |
var |
| 2376 |
> |
pb: PBlobDataArray; |
| 2377 |
> |
fs: TIBBlobStream; |
| 2378 |
> |
Buff: PChar; |
| 2379 |
> |
bTr, bDB: Boolean; |
| 2380 |
> |
begin |
| 2381 |
> |
Buff := GetActiveBuf; |
| 2382 |
> |
if Buff = nil then |
| 2383 |
> |
begin |
| 2384 |
> |
fs := TIBBlobStream.Create; |
| 2385 |
> |
fs.Mode := bmReadWrite; |
| 2386 |
> |
FBlobStreamList.Add(Pointer(fs)); |
| 2387 |
> |
result := TIBDSBlobStream.Create(Field, fs, Mode); |
| 2388 |
> |
exit; |
| 2389 |
> |
end; |
| 2390 |
> |
pb := PBlobDataArray(Buff + FBlobCacheOffset); |
| 2391 |
> |
if pb^[Field.Offset] = nil then |
| 2392 |
> |
begin |
| 2393 |
> |
AdjustRecordOnInsert(Buff); |
| 2394 |
> |
pb^[Field.Offset] := TIBBlobStream.Create; |
| 2395 |
> |
fs := pb^[Field.Offset]; |
| 2396 |
> |
FBlobStreamList.Add(Pointer(fs)); |
| 2397 |
> |
fs.Mode := bmReadWrite; |
| 2398 |
> |
fs.Database := Database; |
| 2399 |
> |
fs.Transaction := Transaction; |
| 2400 |
> |
fs.BlobID := |
| 2401 |
> |
PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^; |
| 2402 |
> |
if (CachedUpdates) then |
| 2403 |
> |
begin |
| 2404 |
> |
bTr := not Transaction.InTransaction; |
| 2405 |
> |
bDB := not Database.Connected; |
| 2406 |
> |
if bDB then |
| 2407 |
> |
Database.Open; |
| 2408 |
> |
if bTr then |
| 2409 |
> |
Transaction.StartTransaction; |
| 2410 |
> |
fs.Seek(0, soFromBeginning); |
| 2411 |
> |
if bTr then |
| 2412 |
> |
Transaction.Commit; |
| 2413 |
> |
if bDB then |
| 2414 |
> |
Database.Close; |
| 2415 |
> |
end; |
| 2416 |
> |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff)); |
| 2417 |
> |
end else |
| 2418 |
> |
fs := pb^[Field.Offset]; |
| 2419 |
> |
result := TIBDSBlobStream.Create(Field, fs, Mode); |
| 2420 |
> |
end; |
| 2421 |
> |
|
| 2422 |
> |
function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; |
| 2423 |
> |
const |
| 2424 |
> |
CMPLess = -1; |
| 2425 |
> |
CMPEql = 0; |
| 2426 |
> |
CMPGtr = 1; |
| 2427 |
> |
RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess), |
| 2428 |
> |
(CMPGtr, CMPEql)); |
| 2429 |
> |
begin |
| 2430 |
> |
result := RetCodes[Bookmark1 = nil, Bookmark2 = nil]; |
| 2431 |
> |
|
| 2432 |
> |
if Result = 2 then |
| 2433 |
> |
begin |
| 2434 |
> |
if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then |
| 2435 |
> |
Result := CMPLess |
| 2436 |
> |
else |
| 2437 |
> |
if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then |
| 2438 |
> |
Result := CMPGtr |
| 2439 |
> |
else |
| 2440 |
> |
Result := CMPEql; |
| 2441 |
> |
end; |
| 2442 |
> |
end; |
| 2443 |
> |
|
| 2444 |
> |
procedure TIBCustomDataSet.DoBeforeDelete; |
| 2445 |
> |
var |
| 2446 |
> |
Buff: PRecordData; |
| 2447 |
> |
begin |
| 2448 |
> |
if not CanDelete then |
| 2449 |
> |
IBError(ibxeCannotDelete, [nil]); |
| 2450 |
> |
Buff := PRecordData(GetActiveBuf); |
| 2451 |
> |
if FCachedUpdates and |
| 2452 |
> |
(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then |
| 2453 |
> |
SaveOldBuffer(PChar(Buff)); |
| 2454 |
> |
inherited DoBeforeDelete; |
| 2455 |
> |
end; |
| 2456 |
> |
|
| 2457 |
> |
procedure TIBCustomDataSet.DoBeforeEdit; |
| 2458 |
> |
var |
| 2459 |
> |
Buff: PRecordData; |
| 2460 |
> |
begin |
| 2461 |
> |
Buff := PRecordData(GetActiveBuf); |
| 2462 |
> |
if not(CanEdit or (FQModify.SQL.Count <> 0) or |
| 2463 |
> |
(FCachedUpdates and Assigned(FOnUpdateRecord))) then |
| 2464 |
> |
IBError(ibxeCannotUpdate, [nil]); |
| 2465 |
> |
if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then |
| 2466 |
> |
SaveOldBuffer(PChar(Buff)); |
| 2467 |
> |
CopyRecordBuffer(GetActiveBuf, FOldBuffer); |
| 2468 |
> |
inherited DoBeforeEdit; |
| 2469 |
> |
end; |
| 2470 |
> |
|
| 2471 |
> |
procedure TIBCustomDataSet.DoBeforeInsert; |
| 2472 |
> |
begin |
| 2473 |
> |
if not CanInsert then |
| 2474 |
> |
IBError(ibxeCannotInsert, [nil]); |
| 2475 |
> |
inherited DoBeforeInsert; |
| 2476 |
> |
end; |
| 2477 |
> |
|
| 2478 |
> |
procedure TIBCustomDataSet.DoAfterInsert; |
| 2479 |
> |
begin |
| 2480 |
> |
if GeneratorField.ApplyOnEvent = gaeOnNewRecord then |
| 2481 |
> |
GeneratorField.Apply; |
| 2482 |
> |
inherited DoAfterInsert; |
| 2483 |
> |
end; |
| 2484 |
> |
|
| 2485 |
> |
procedure TIBCustomDataSet.DoBeforePost; |
| 2486 |
> |
begin |
| 2487 |
> |
inherited DoBeforePost; |
| 2488 |
> |
if (State = dsInsert) and |
| 2489 |
> |
(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then |
| 2490 |
> |
GeneratorField.Apply |
| 2491 |
> |
end; |
| 2492 |
> |
|
| 2493 |
> |
procedure TIBCustomDataSet.FetchAll; |
| 2494 |
> |
var |
| 2495 |
> |
SetCursor: Boolean; |
| 2496 |
> |
{$IF FPC_FULLVERSION >= 20700 } |
| 2497 |
> |
CurBookmark: TBookmark; |
| 2498 |
> |
{$ELSE} |
| 2499 |
> |
CurBookmark: string; |
| 2500 |
> |
{$ENDIF} |
| 2501 |
> |
begin |
| 2502 |
> |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 2503 |
> |
if SetCursor then |
| 2504 |
> |
Screen.Cursor := crHourGlass; |
| 2505 |
> |
try |
| 2506 |
> |
if FQSelect.EOF or not FQSelect.Open then |
| 2507 |
> |
exit; |
| 2508 |
> |
DisableControls; |
| 2509 |
> |
try |
| 2510 |
> |
CurBookmark := Bookmark; |
| 2511 |
> |
Last; |
| 2512 |
> |
Bookmark := CurBookmark; |
| 2513 |
> |
finally |
| 2514 |
> |
EnableControls; |
| 2515 |
> |
end; |
| 2516 |
> |
finally |
| 2517 |
> |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 2518 |
> |
Screen.Cursor := crDefault; |
| 2519 |
> |
end; |
| 2520 |
> |
end; |
| 2521 |
> |
|
| 2522 |
> |
procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar); |
| 2523 |
> |
begin |
| 2524 |
> |
FreeMem(Buffer); |
| 2525 |
> |
Buffer := nil; |
| 2526 |
> |
end; |
| 2527 |
> |
|
| 2528 |
> |
procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer); |
| 2529 |
> |
begin |
| 2530 |
> |
Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize); |
| 2531 |
> |
end; |
| 2532 |
> |
|
| 2533 |
> |
function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; |
| 2534 |
> |
begin |
| 2535 |
> |
result := PRecordData(Buffer)^.rdBookmarkFlag; |
| 2536 |
> |
end; |
| 2537 |
> |
|
| 2538 |
> |
function TIBCustomDataSet.GetCanModify: Boolean; |
| 2539 |
> |
begin |
| 2540 |
> |
result := (FQInsert.SQL.Text <> '') or |
| 2541 |
> |
(FQModify.SQL.Text <> '') or |
| 2542 |
> |
(FQDelete.SQL.Text <> '') or |
| 2543 |
> |
(Assigned(FUpdateObject)); |
| 2544 |
> |
end; |
| 2545 |
> |
|
| 2546 |
> |
function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean; |
| 2547 |
> |
begin |
| 2548 |
> |
if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then |
| 2549 |
> |
begin |
| 2550 |
> |
UpdateCursorPos; |
| 2551 |
> |
ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False); |
| 2552 |
> |
result := True; |
| 2553 |
> |
end |
| 2554 |
> |
else |
| 2555 |
> |
result := False; |
| 2556 |
> |
end; |
| 2557 |
> |
|
| 2558 |
> |
function TIBCustomDataSet.GetDataSource: TDataSource; |
| 2559 |
> |
begin |
| 2560 |
> |
if FDataLink = nil then |
| 2561 |
> |
result := nil |
| 2562 |
> |
else |
| 2563 |
> |
result := FDataLink.DataSource; |
| 2564 |
> |
end; |
| 2565 |
> |
|
| 2566 |
> |
function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass; |
| 2567 |
> |
begin |
| 2568 |
> |
Result := DefaultFieldClasses[FieldType]; |
| 2569 |
> |
end; |
| 2570 |
> |
|
| 2571 |
> |
function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; |
| 2572 |
> |
begin |
| 2573 |
> |
result := GetFieldData(FieldByNumber(FieldNo), buffer); |
| 2574 |
> |
end; |
| 2575 |
> |
|
| 2576 |
> |
function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; |
| 2577 |
> |
var |
| 2578 |
> |
Buff, Data: PChar; |
| 2579 |
> |
CurrentRecord: PRecordData; |
| 2580 |
> |
begin |
| 2581 |
> |
result := False; |
| 2582 |
> |
Buff := GetActiveBuf; |
| 2583 |
> |
if (Buff = nil) or |
| 2584 |
> |
(not IsVisible(Buff)) or not assigned(Field.DataSet) then |
| 2585 |
> |
exit; |
| 2586 |
> |
{ The intention here is to stuff the buffer with the data for the |
| 2587 |
> |
referenced field for the current record } |
| 2588 |
> |
CurrentRecord := PRecordData(Buff); |
| 2589 |
> |
if (Field.FieldNo < 0) then |
| 2590 |
> |
begin |
| 2591 |
> |
Inc(Buff, FRecordSize + Field.Offset); |
| 2592 |
> |
result := Boolean(Buff[0]); |
| 2593 |
> |
if result and (Buffer <> nil) then |
| 2594 |
> |
Move(Buff[1], Buffer^, Field.DataSize); |
| 2595 |
> |
end |
| 2596 |
> |
else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and |
| 2597 |
> |
(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then |
| 2598 |
> |
begin |
| 2599 |
> |
result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull; |
| 2600 |
> |
if result and (Buffer <> nil) then |
| 2601 |
> |
with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do |
| 2602 |
> |
begin |
| 2603 |
> |
Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs; |
| 2604 |
> |
if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then |
| 2605 |
> |
begin |
| 2606 |
> |
if fdDataLength <= Field.Size then |
| 2607 |
> |
begin |
| 2608 |
> |
Move(Data^, Buffer^, fdDataLength); |
| 2609 |
> |
PChar(Buffer)[fdDataLength] := #0; |
| 2610 |
> |
end |
| 2611 |
> |
else |
| 2612 |
> |
IBError(ibxeFieldSizeError,[Field.FieldName]) |
| 2613 |
> |
end |
| 2614 |
> |
else |
| 2615 |
> |
Move(Data^, Buffer^, Field.DataSize); |
| 2616 |
> |
end; |
| 2617 |
> |
end; |
| 2618 |
> |
end; |
| 2619 |
> |
|
| 2620 |
> |
{ GetRecNo and SetRecNo both operate off of 1-based indexes as |
| 2621 |
> |
opposed to 0-based indexes. |
| 2622 |
> |
This is because we want LastRecordNumber/RecordCount = 1 } |
| 2623 |
> |
|
| 2624 |
> |
function TIBCustomDataSet.GetRecNo: Integer; |
| 2625 |
> |
begin |
| 2626 |
> |
if GetActiveBuf = nil then |
| 2627 |
> |
result := 0 |
| 2628 |
> |
else |
| 2629 |
> |
result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1; |
| 2630 |
> |
end; |
| 2631 |
> |
|
| 2632 |
> |
function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode; |
| 2633 |
> |
DoCheck: Boolean): TGetResult; |
| 2634 |
> |
var |
| 2635 |
> |
Accept: Boolean; |
| 2636 |
> |
SaveState: TDataSetState; |
| 2637 |
> |
begin |
| 2638 |
> |
Result := grOK; |
| 2639 |
> |
if Filtered and Assigned(OnFilterRecord) then |
| 2640 |
> |
begin |
| 2641 |
> |
Accept := False; |
| 2642 |
> |
SaveState := SetTempState(dsFilter); |
| 2643 |
> |
while not Accept do |
| 2644 |
> |
begin |
| 2645 |
> |
Result := InternalGetRecord(Buffer, GetMode, DoCheck); |
| 2646 |
> |
if Result <> grOK then |
| 2647 |
> |
break; |
| 2648 |
> |
FFilterBuffer := Buffer; |
| 2649 |
> |
try |
| 2650 |
> |
Accept := True; |
| 2651 |
> |
OnFilterRecord(Self, Accept); |
| 2652 |
> |
if not Accept and (GetMode = gmCurrent) then |
| 2653 |
> |
GetMode := gmPrior; |
| 2654 |
> |
except |
| 2655 |
> |
// Application.HandleException(Self); |
| 2656 |
> |
end; |
| 2657 |
> |
end; |
| 2658 |
> |
RestoreState(SaveState); |
| 2659 |
> |
end |
| 2660 |
> |
else |
| 2661 |
> |
Result := InternalGetRecord(Buffer, GetMode, DoCheck); |
| 2662 |
> |
end; |
| 2663 |
> |
|
| 2664 |
> |
function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode; |
| 2665 |
> |
DoCheck: Boolean): TGetResult; |
| 2666 |
> |
begin |
| 2667 |
> |
result := grError; |
| 2668 |
> |
case GetMode of |
| 2669 |
> |
gmCurrent: begin |
| 2670 |
> |
if (FCurrentRecord >= 0) then begin |
| 2671 |
> |
if FCurrentRecord < FRecordCount then |
| 2672 |
> |
ReadRecordCache(FCurrentRecord, Buffer, False) |
| 2673 |
> |
else begin |
| 2674 |
> |
while (not FQSelect.EOF) and |
| 2675 |
> |
(FQSelect.Next <> nil) and |
| 2676 |
> |
(FCurrentRecord >= FRecordCount) do begin |
| 2677 |
> |
FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer); |
| 2678 |
> |
Inc(FRecordCount); |
| 2679 |
> |
end; |
| 2680 |
> |
FCurrentRecord := FRecordCount - 1; |
| 2681 |
> |
if (FCurrentRecord >= 0) then |
| 2682 |
> |
ReadRecordCache(FCurrentRecord, Buffer, False); |
| 2683 |
> |
end; |
| 2684 |
> |
result := grOk; |
| 2685 |
> |
end else |
| 2686 |
> |
result := grBOF; |
| 2687 |
> |
end; |
| 2688 |
> |
gmNext: begin |
| 2689 |
> |
result := grOk; |
| 2690 |
> |
if FCurrentRecord = FRecordCount then |
| 2691 |
> |
result := grEOF |
| 2692 |
> |
else if FCurrentRecord = FRecordCount - 1 then begin |
| 2693 |
> |
if (not FQSelect.EOF) then begin |
| 2694 |
> |
FQSelect.Next; |
| 2695 |
> |
Inc(FCurrentRecord); |
| 2696 |
> |
end; |
| 2697 |
> |
if (FQSelect.EOF) then begin |
| 2698 |
> |
result := grEOF; |
| 2699 |
> |
end else begin |
| 2700 |
> |
Inc(FRecordCount); |
| 2701 |
> |
FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer); |
| 2702 |
> |
end; |
| 2703 |
> |
end else if (FCurrentRecord < FRecordCount) then begin |
| 2704 |
> |
Inc(FCurrentRecord); |
| 2705 |
> |
ReadRecordCache(FCurrentRecord, Buffer, False); |
| 2706 |
> |
end; |
| 2707 |
> |
end; |
| 2708 |
> |
else { gmPrior } |
| 2709 |
> |
begin |
| 2710 |
> |
if (FCurrentRecord = 0) then begin |
| 2711 |
> |
Dec(FCurrentRecord); |
| 2712 |
> |
result := grBOF; |
| 2713 |
> |
end else if (FCurrentRecord > 0) and |
| 2714 |
> |
(FCurrentRecord <= FRecordCount) then begin |
| 2715 |
> |
Dec(FCurrentRecord); |
| 2716 |
> |
ReadRecordCache(FCurrentRecord, Buffer, False); |
| 2717 |
> |
result := grOk; |
| 2718 |
> |
end else if (FCurrentRecord = -1) then |
| 2719 |
> |
result := grBOF; |
| 2720 |
> |
end; |
| 2721 |
> |
end; |
| 2722 |
> |
if result = grOk then |
| 2723 |
> |
result := AdjustCurrentRecord(Buffer, GetMode); |
| 2724 |
> |
if result = grOk then with PRecordData(Buffer)^ do begin |
| 2725 |
> |
rdBookmarkFlag := bfCurrent; |
| 2726 |
> |
GetCalcFields(Buffer); |
| 2727 |
> |
end else if (result = grEOF) then begin |
| 2728 |
> |
CopyRecordBuffer(FModelBuffer, Buffer); |
| 2729 |
> |
PRecordData(Buffer)^.rdBookmarkFlag := bfEOF; |
| 2730 |
> |
end else if (result = grBOF) then begin |
| 2731 |
> |
CopyRecordBuffer(FModelBuffer, Buffer); |
| 2732 |
> |
PRecordData(Buffer)^.rdBookmarkFlag := bfBOF; |
| 2733 |
> |
end else if (result = grError) then begin |
| 2734 |
> |
CopyRecordBuffer(FModelBuffer, Buffer); |
| 2735 |
> |
PRecordData(Buffer)^.rdBookmarkFlag := bfEOF; |
| 2736 |
> |
end;; |
| 2737 |
> |
end; |
| 2738 |
> |
|
| 2739 |
> |
function TIBCustomDataSet.GetRecordCount: Integer; |
| 2740 |
> |
begin |
| 2741 |
> |
result := FRecordCount - FDeletedRecords; |
| 2742 |
> |
end; |
| 2743 |
> |
|
| 2744 |
> |
function TIBCustomDataSet.GetRecordSize: Word; |
| 2745 |
> |
begin |
| 2746 |
> |
result := FRecordBufferSize; |
| 2747 |
> |
end; |
| 2748 |
> |
|
| 2749 |
> |
procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean); |
| 2750 |
> |
begin |
| 2751 |
> |
CheckEditState; |
| 2752 |
> |
begin |
| 2753 |
> |
{ When adding records, we *always* append. |
| 2754 |
> |
Insertion is just too costly } |
| 2755 |
> |
AdjustRecordOnInsert(Buffer); |
| 2756 |
> |
with PRecordData(Buffer)^ do |
| 2757 |
> |
begin |
| 2758 |
> |
rdUpdateStatus := usInserted; |
| 2759 |
> |
rdCachedUpdateStatus := cusInserted; |
| 2760 |
> |
end; |
| 2761 |
> |
if not CachedUpdates then |
| 2762 |
> |
InternalPostRecord(FQInsert, Buffer) |
| 2763 |
> |
else begin |
| 2764 |
> |
WriteRecordCache(FCurrentRecord, Buffer); |
| 2765 |
> |
FUpdatesPending := True; |
| 2766 |
> |
end; |
| 2767 |
> |
Inc(FRecordCount); |
| 2768 |
> |
InternalSetToRecord(Buffer); |
| 2769 |
> |
end |
| 2770 |
> |
end; |
| 2771 |
> |
|
| 2772 |
> |
procedure TIBCustomDataSet.InternalCancel; |
| 2773 |
> |
var |
| 2774 |
> |
Buff: PChar; |
| 2775 |
> |
CurRec: Integer; |
| 2776 |
> |
begin |
| 2777 |
> |
inherited InternalCancel; |
| 2778 |
> |
Buff := GetActiveBuf; |
| 2779 |
> |
if Buff <> nil then begin |
| 2780 |
> |
CurRec := FCurrentRecord; |
| 2781 |
> |
AdjustRecordOnInsert(Buff); |
| 2782 |
> |
if (State = dsEdit) then begin |
| 2783 |
> |
CopyRecordBuffer(FOldBuffer, Buff); |
| 2784 |
> |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 2785 |
> |
end else begin |
| 2786 |
> |
CopyRecordBuffer(FModelBuffer, Buff); |
| 2787 |
> |
PRecordData(Buff)^.rdUpdateStatus := usDeleted; |
| 2788 |
> |
PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified; |
| 2789 |
> |
PRecordData(Buff)^.rdBookmarkFlag := bfEOF; |
| 2790 |
> |
FCurrentRecord := CurRec; |
| 2791 |
> |
end; |
| 2792 |
> |
end; |
| 2793 |
> |
end; |
| 2794 |
> |
|
| 2795 |
> |
|
| 2796 |
> |
procedure TIBCustomDataSet.InternalClose; |
| 2797 |
> |
begin |
| 2798 |
> |
if FDidActivate then |
| 2799 |
> |
DeactivateTransaction; |
| 2800 |
> |
FQSelect.Close; |
| 2801 |
> |
ClearBlobCache; |
| 2802 |
> |
FreeRecordBuffer(FModelBuffer); |
| 2803 |
> |
FreeRecordBuffer(FOldBuffer); |
| 2804 |
> |
FCurrentRecord := -1; |
| 2805 |
> |
FOpen := False; |
| 2806 |
> |
FRecordCount := 0; |
| 2807 |
> |
FDeletedRecords := 0; |
| 2808 |
> |
FRecordSize := 0; |
| 2809 |
> |
FBPos := 0; |
| 2810 |
> |
FOBPos := 0; |
| 2811 |
> |
FCacheSize := 0; |
| 2812 |
> |
FOldCacheSize := 0; |
| 2813 |
> |
FBEnd := 0; |
| 2814 |
> |
FOBEnd := 0; |
| 2815 |
> |
FreeMem(FBufferCache); |
| 2816 |
> |
FBufferCache := nil; |
| 2817 |
> |
FreeMem(FOldBufferCache); |
| 2818 |
> |
FOldBufferCache := nil; |
| 2819 |
> |
BindFields(False); |
| 2820 |
> |
if DefaultFields then DestroyFields; |
| 2821 |
> |
end; |
| 2822 |
> |
|
| 2823 |
> |
procedure TIBCustomDataSet.InternalDelete; |
| 2824 |
> |
var |
| 2825 |
> |
Buff: PChar; |
| 2826 |
> |
SetCursor: Boolean; |
| 2827 |
> |
begin |
| 2828 |
> |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 2829 |
> |
if SetCursor then |
| 2830 |
> |
Screen.Cursor := crHourGlass; |
| 2831 |
> |
try |
| 2832 |
> |
Buff := GetActiveBuf; |
| 2833 |
> |
if CanDelete then |
| 2834 |
> |
begin |
| 2835 |
> |
if not CachedUpdates then |
| 2836 |
> |
InternalDeleteRecord(FQDelete, Buff) |
| 2837 |
> |
else |
| 2838 |
> |
begin |
| 2839 |
> |
with PRecordData(Buff)^ do |
| 2840 |
> |
begin |
| 2841 |
> |
if rdCachedUpdateStatus = cusInserted then |
| 2842 |
> |
rdCachedUpdateStatus := cusUninserted |
| 2843 |
> |
else begin |
| 2844 |
> |
rdUpdateStatus := usDeleted; |
| 2845 |
> |
rdCachedUpdateStatus := cusDeleted; |
| 2846 |
> |
end; |
| 2847 |
> |
end; |
| 2848 |
> |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 2849 |
> |
end; |
| 2850 |
> |
Inc(FDeletedRecords); |
| 2851 |
> |
FUpdatesPending := True; |
| 2852 |
> |
end else |
| 2853 |
> |
IBError(ibxeCannotDelete, [nil]); |
| 2854 |
> |
finally |
| 2855 |
> |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 2856 |
> |
Screen.Cursor := crDefault; |
| 2857 |
> |
end; |
| 2858 |
> |
end; |
| 2859 |
> |
|
| 2860 |
> |
procedure TIBCustomDataSet.InternalFirst; |
| 2861 |
> |
begin |
| 2862 |
> |
FCurrentRecord := -1; |
| 2863 |
> |
end; |
| 2864 |
> |
|
| 2865 |
> |
procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer); |
| 2866 |
> |
begin |
| 2867 |
> |
FCurrentRecord := PInteger(Bookmark)^; |
| 2868 |
> |
end; |
| 2869 |
> |
|
| 2870 |
> |
procedure TIBCustomDataSet.InternalHandleException; |
| 2871 |
> |
begin |
| 2872 |
> |
Application.HandleException(Self) |
| 2873 |
> |
end; |
| 2874 |
> |
|
| 2875 |
> |
procedure TIBCustomDataSet.InternalInitFieldDefs; |
| 2876 |
> |
const |
| 2877 |
> |
DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize} |
| 2878 |
> |
'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize} |
| 2879 |
> |
'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize} |
| 2880 |
> |
'where R.RDB$RELATION_NAME = :RELATION ' + {do not localize} |
| 2881 |
> |
'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize} |
| 2882 |
> |
'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize} |
| 2883 |
> |
' (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize} |
| 2884 |
> |
var |
| 2885 |
> |
FieldType: TFieldType; |
| 2886 |
> |
FieldSize: Word; |
| 2887 |
> |
FieldNullable : Boolean; |
| 2888 |
> |
i, FieldPosition, FieldPrecision: Integer; |
| 2889 |
> |
FieldAliasName: string; |
| 2890 |
> |
RelationName, FieldName: string; |
| 2891 |
> |
Query : TIBSQL; |
| 2892 |
> |
FieldIndex: Integer; |
| 2893 |
> |
FRelationNodes : TRelationNode; |
| 2894 |
> |
|
| 2895 |
> |
function Add_Node(Relation, Field : String) : TRelationNode; |
| 2896 |
> |
var |
| 2897 |
> |
FField : TFieldNode; |
| 2898 |
> |
begin |
| 2899 |
> |
if FRelationNodes.RelationName = '' then |
| 2900 |
> |
Result := FRelationNodes |
| 2901 |
> |
else |
| 2902 |
> |
begin |
| 2903 |
> |
Result := TRelationNode.Create; |
| 2904 |
> |
Result.NextRelation := FRelationNodes; |
| 2905 |
> |
end; |
| 2906 |
> |
Result.RelationName := Relation; |
| 2907 |
> |
FRelationNodes := Result; |
| 2908 |
> |
Query.Params[0].AsString := Relation; |
| 2909 |
> |
Query.ExecQuery; |
| 2910 |
> |
while not Query.Eof do |
| 2911 |
> |
begin |
| 2912 |
> |
FField := TFieldNode.Create; |
| 2913 |
> |
FField.FieldName := Query.Fields[2].AsString; |
| 2914 |
> |
FField.DEFAULT_VALUE := not Query.Fields[1].IsNull; |
| 2915 |
> |
FField.COMPUTED_BLR := not Query.Fields[0].IsNull; |
| 2916 |
> |
FField.NextField := Result.FieldNodes; |
| 2917 |
> |
Result.FieldNodes := FField; |
| 2918 |
> |
Query.Next; |
| 2919 |
> |
end; |
| 2920 |
> |
Query.Close; |
| 2921 |
> |
end; |
| 2922 |
> |
|
| 2923 |
> |
function Has_COMPUTED_BLR(Relation, Field : String) : Boolean; |
| 2924 |
> |
var |
| 2925 |
> |
FRelation : TRelationNode; |
| 2926 |
> |
FField : TFieldNode; |
| 2927 |
> |
begin |
| 2928 |
> |
FRelation := FRelationNodes; |
| 2929 |
> |
while Assigned(FRelation) and |
| 2930 |
> |
(FRelation.RelationName <> Relation) do |
| 2931 |
> |
FRelation := FRelation.NextRelation; |
| 2932 |
> |
if not Assigned(FRelation) then |
| 2933 |
> |
FRelation := Add_Node(Relation, Field); |
| 2934 |
> |
Result := false; |
| 2935 |
> |
FField := FRelation.FieldNodes; |
| 2936 |
> |
while Assigned(FField) do |
| 2937 |
> |
if FField.FieldName = Field then |
| 2938 |
> |
begin |
| 2939 |
> |
Result := Ffield.COMPUTED_BLR; |
| 2940 |
> |
Exit; |
| 2941 |
> |
end |
| 2942 |
> |
else |
| 2943 |
> |
FField := Ffield.NextField; |
| 2944 |
> |
end; |
| 2945 |
> |
|
| 2946 |
> |
function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean; |
| 2947 |
> |
var |
| 2948 |
> |
FRelation : TRelationNode; |
| 2949 |
> |
FField : TFieldNode; |
| 2950 |
> |
begin |
| 2951 |
> |
FRelation := FRelationNodes; |
| 2952 |
> |
while Assigned(FRelation) and |
| 2953 |
> |
(FRelation.RelationName <> Relation) do |
| 2954 |
> |
FRelation := FRelation.NextRelation; |
| 2955 |
> |
if not Assigned(FRelation) then |
| 2956 |
> |
FRelation := Add_Node(Relation, Field); |
| 2957 |
> |
Result := false; |
| 2958 |
> |
FField := FRelation.FieldNodes; |
| 2959 |
> |
while Assigned(FField) do |
| 2960 |
> |
if FField.FieldName = Field then |
| 2961 |
> |
begin |
| 2962 |
> |
Result := Ffield.DEFAULT_VALUE; |
| 2963 |
> |
Exit; |
| 2964 |
> |
end |
| 2965 |
> |
else |
| 2966 |
> |
FField := Ffield.NextField; |
| 2967 |
> |
end; |
| 2968 |
> |
|
| 2969 |
> |
Procedure FreeNodes; |
| 2970 |
> |
var |
| 2971 |
> |
FRelation : TRelationNode; |
| 2972 |
> |
FField : TFieldNode; |
| 2973 |
> |
begin |
| 2974 |
> |
while Assigned(FRelationNodes) do |
| 2975 |
> |
begin |
| 2976 |
> |
While Assigned(FRelationNodes.FieldNodes) do |
| 2977 |
> |
begin |
| 2978 |
> |
FField := FRelationNodes.FieldNodes.NextField; |
| 2979 |
> |
FRelationNodes.FieldNodes.Free; |
| 2980 |
> |
FRelationNodes.FieldNodes := FField; |
| 2981 |
> |
end; |
| 2982 |
> |
FRelation := FRelationNodes.NextRelation; |
| 2983 |
> |
FRelationNodes.Free; |
| 2984 |
> |
FRelationNodes := FRelation; |
| 2985 |
> |
end; |
| 2986 |
> |
end; |
| 2987 |
> |
|
| 2988 |
> |
begin |
| 2989 |
> |
if not InternalPrepared then |
| 2990 |
> |
begin |
| 2991 |
> |
InternalPrepare; |
| 2992 |
> |
exit; |
| 2993 |
> |
end; |
| 2994 |
> |
FRelationNodes := TRelationNode.Create; |
| 2995 |
> |
FNeedsRefresh := False; |
| 2996 |
> |
Database.InternalTransaction.StartTransaction; |
| 2997 |
> |
Query := TIBSQL.Create(self); |
| 2998 |
> |
try |
| 2999 |
> |
Query.Database := DataBase; |
| 3000 |
> |
Query.Transaction := Database.InternalTransaction; |
| 3001 |
> |
FieldDefs.BeginUpdate; |
| 3002 |
> |
FieldDefs.Clear; |
| 3003 |
> |
FieldIndex := 0; |
| 3004 |
> |
if (Length(FMappedFieldPosition) < FQSelect.Current.Count) then |
| 3005 |
> |
SetLength(FMappedFieldPosition, FQSelect.Current.Count); |
| 3006 |
> |
Query.SQL.Text := DefaultSQL; |
| 3007 |
> |
Query.Prepare; |
| 3008 |
> |
for i := 0 to FQSelect.Current.Count - 1 do |
| 3009 |
> |
with FQSelect.Current[i].Data^ do |
| 3010 |
> |
begin |
| 3011 |
> |
{ Get the field name } |
| 3012 |
> |
SetString(FieldAliasName, aliasname, aliasname_length); |
| 3013 |
> |
SetString(RelationName, relname, relname_length); |
| 3014 |
> |
SetString(FieldName, sqlname, sqlname_length); |
| 3015 |
> |
FieldSize := 0; |
| 3016 |
> |
FieldPrecision := 0; |
| 3017 |
> |
FieldNullable := FQSelect.Current[i].IsNullable; |
| 3018 |
> |
case sqltype and not 1 of |
| 3019 |
> |
{ All VARCHAR's must be converted to strings before recording |
| 3020 |
> |
their values } |
| 3021 |
> |
SQL_VARYING, SQL_TEXT: |
| 3022 |
> |
begin |
| 3023 |
> |
FieldSize := sqllen; |
| 3024 |
> |
FieldType := ftString; |
| 3025 |
> |
end; |
| 3026 |
> |
{ All Doubles/Floats should be cast to doubles } |
| 3027 |
> |
SQL_DOUBLE, SQL_FLOAT: |
| 3028 |
> |
FieldType := ftFloat; |
| 3029 |
> |
SQL_SHORT: |
| 3030 |
> |
begin |
| 3031 |
> |
if (sqlscale = 0) then |
| 3032 |
> |
FieldType := ftSmallInt |
| 3033 |
> |
else begin |
| 3034 |
> |
FieldType := ftBCD; |
| 3035 |
> |
FieldPrecision := 4; |
| 3036 |
> |
FieldSize := -sqlscale; |
| 3037 |
> |
end; |
| 3038 |
> |
end; |
| 3039 |
> |
SQL_LONG: |
| 3040 |
> |
begin |
| 3041 |
> |
if (sqlscale = 0) then |
| 3042 |
> |
FieldType := ftInteger |
| 3043 |
> |
else if (sqlscale >= (-4)) then |
| 3044 |
> |
begin |
| 3045 |
> |
FieldType := ftBCD; |
| 3046 |
> |
FieldPrecision := 9; |
| 3047 |
> |
FieldSize := -sqlscale; |
| 3048 |
> |
end |
| 3049 |
> |
else |
| 3050 |
> |
if Database.SQLDialect = 1 then |
| 3051 |
> |
FieldType := ftFloat |
| 3052 |
> |
else |
| 3053 |
> |
if (FieldCount > i) and (Fields[i] is TFloatField) then |
| 3054 |
> |
FieldType := ftFloat |
| 3055 |
> |
else |
| 3056 |
> |
begin |
| 3057 |
> |
FieldType := ftFMTBCD; |
| 3058 |
> |
FieldPrecision := 9; |
| 3059 |
> |
FieldSize := -sqlscale; |
| 3060 |
> |
end; |
| 3061 |
> |
end; |
| 3062 |
> |
|
| 3063 |
> |
SQL_INT64: |
| 3064 |
> |
begin |
| 3065 |
> |
if (sqlscale = 0) then |
| 3066 |
> |
FieldType := ftLargeInt |
| 3067 |
> |
else if (sqlscale >= (-4)) then |
| 3068 |
> |
begin |
| 3069 |
> |
FieldType := ftBCD; |
| 3070 |
> |
FieldPrecision := 18; |
| 3071 |
> |
FieldSize := -sqlscale; |
| 3072 |
> |
end |
| 3073 |
> |
else |
| 3074 |
> |
FieldType := ftFloat |
| 3075 |
> |
end; |
| 3076 |
> |
SQL_TIMESTAMP: FieldType := ftDateTime; |
| 3077 |
> |
SQL_TYPE_TIME: FieldType := ftTime; |
| 3078 |
> |
SQL_TYPE_DATE: FieldType := ftDate; |
| 3079 |
> |
SQL_BLOB: |
| 3080 |
> |
begin |
| 3081 |
> |
FieldSize := sizeof (TISC_QUAD); |
| 3082 |
> |
if (sqlsubtype = 1) then |
| 3083 |
> |
FieldType := ftmemo |
| 3084 |
> |
else |
| 3085 |
> |
FieldType := ftBlob; |
| 3086 |
> |
end; |
| 3087 |
> |
SQL_ARRAY: |
| 3088 |
> |
begin |
| 3089 |
> |
FieldSize := sizeof (TISC_QUAD); |
| 3090 |
> |
FieldType := ftUnknown; |
| 3091 |
> |
end; |
| 3092 |
> |
else |
| 3093 |
> |
FieldType := ftUnknown; |
| 3094 |
> |
end; |
| 3095 |
> |
FieldPosition := i + 1; |
| 3096 |
> |
if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize} |
| 3097 |
> |
begin |
| 3098 |
> |
FMappedFieldPosition[FieldIndex] := FieldPosition; |
| 3099 |
> |
Inc(FieldIndex); |
| 3100 |
> |
with FieldDefs.AddFieldDef do |
| 3101 |
> |
begin |
| 3102 |
> |
Name := FieldAliasName; |
| 3103 |
> |
(* FieldNo := FieldPosition;*) |
| 3104 |
> |
DataType := FieldType; |
| 3105 |
> |
Size := FieldSize; |
| 3106 |
> |
Precision := FieldPrecision; |
| 3107 |
> |
Required := not FieldNullable; |
| 3108 |
> |
InternalCalcField := False; |
| 3109 |
> |
if (FieldName <> '') and (RelationName <> '') then |
| 3110 |
> |
begin |
| 3111 |
> |
if Has_COMPUTED_BLR(RelationName, FieldName) then |
| 3112 |
> |
begin |
| 3113 |
> |
Attributes := [faReadOnly]; |
| 3114 |
> |
InternalCalcField := True; |
| 3115 |
> |
FNeedsRefresh := True; |
| 3116 |
> |
end |
| 3117 |
> |
else |
| 3118 |
> |
begin |
| 3119 |
> |
if Has_DEFAULT_VALUE(RelationName, FieldName) then |
| 3120 |
> |
begin |
| 3121 |
> |
if not FieldNullable then |
| 3122 |
> |
Attributes := [faRequired]; |
| 3123 |
> |
end |
| 3124 |
> |
else |
| 3125 |
> |
FNeedsRefresh := True; |
| 3126 |
> |
end; |
| 3127 |
> |
end; |
| 3128 |
> |
end; |
| 3129 |
> |
end; |
| 3130 |
> |
end; |
| 3131 |
> |
finally |
| 3132 |
> |
Query.free; |
| 3133 |
> |
FreeNodes; |
| 3134 |
> |
Database.InternalTransaction.Commit; |
| 3135 |
> |
FieldDefs.EndUpdate; |
| 3136 |
> |
end; |
| 3137 |
> |
end; |
| 3138 |
> |
|
| 3139 |
> |
procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar); |
| 3140 |
> |
begin |
| 3141 |
> |
CopyRecordBuffer(FModelBuffer, Buffer); |
| 3142 |
> |
end; |
| 3143 |
> |
|
| 3144 |
> |
procedure TIBCustomDataSet.InternalLast; |
| 3145 |
> |
var |
| 3146 |
> |
Buffer: PChar; |
| 3147 |
> |
begin |
| 3148 |
> |
if (FQSelect.EOF) then |
| 3149 |
> |
FCurrentRecord := FRecordCount |
| 3150 |
> |
else begin |
| 3151 |
> |
Buffer := AllocRecordBuffer; |
| 3152 |
> |
try |
| 3153 |
> |
while FQSelect.Next <> nil do |
| 3154 |
> |
begin |
| 3155 |
> |
FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer); |
| 3156 |
> |
Inc(FRecordCount); |
| 3157 |
> |
end; |
| 3158 |
> |
FCurrentRecord := FRecordCount; |
| 3159 |
> |
finally |
| 3160 |
> |
FreeRecordBuffer(Buffer); |
| 3161 |
> |
end; |
| 3162 |
> |
end; |
| 3163 |
> |
end; |
| 3164 |
> |
|
| 3165 |
> |
procedure TIBCustomDataSet.InternalSetParamsFromCursor; |
| 3166 |
> |
var |
| 3167 |
> |
i: Integer; |
| 3168 |
> |
cur_param: TIBXSQLVAR; |
| 3169 |
> |
cur_field: TField; |
| 3170 |
> |
s: TStream; |
| 3171 |
> |
begin |
| 3172 |
> |
if FQSelect.SQL.Text = '' then |
| 3173 |
> |
IBError(ibxeEmptyQuery, [nil]); |
| 3174 |
> |
if not FInternalPrepared then |
| 3175 |
> |
InternalPrepare; |
| 3176 |
> |
if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then |
| 3177 |
> |
begin |
| 3178 |
> |
for i := 0 to SQLParams.Count - 1 do |
| 3179 |
> |
begin |
| 3180 |
> |
cur_field := DataSource.DataSet.FindField(SQLParams[i].Name); |
| 3181 |
> |
cur_param := SQLParams[i]; |
| 3182 |
> |
if (cur_field <> nil) then begin |
| 3183 |
> |
if (cur_field.IsNull) then |
| 3184 |
> |
cur_param.IsNull := True |
| 3185 |
> |
else case cur_field.DataType of |
| 3186 |
> |
ftString: |
| 3187 |
> |
cur_param.AsString := cur_field.AsString; |
| 3188 |
> |
ftBoolean, ftSmallint, ftWord: |
| 3189 |
> |
cur_param.AsShort := cur_field.AsInteger; |
| 3190 |
> |
ftInteger: |
| 3191 |
> |
cur_param.AsLong := cur_field.AsInteger; |
| 3192 |
> |
ftLargeInt: |
| 3193 |
> |
cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt; |
| 3194 |
> |
ftFloat, ftCurrency: |
| 3195 |
> |
cur_param.AsDouble := cur_field.AsFloat; |
| 3196 |
> |
ftBCD: |
| 3197 |
> |
cur_param.AsCurrency := cur_field.AsCurrency; |
| 3198 |
> |
ftDate: |
| 3199 |
> |
cur_param.AsDate := cur_field.AsDateTime; |
| 3200 |
> |
ftTime: |
| 3201 |
> |
cur_param.AsTime := cur_field.AsDateTime; |
| 3202 |
> |
ftDateTime: |
| 3203 |
> |
cur_param.AsDateTime := cur_field.AsDateTime; |
| 3204 |
> |
ftBlob, ftMemo: |
| 3205 |
> |
begin |
| 3206 |
> |
s := nil; |
| 3207 |
> |
try |
| 3208 |
> |
s := DataSource.DataSet. |
| 3209 |
> |
CreateBlobStream(cur_field, bmRead); |
| 3210 |
> |
cur_param.LoadFromStream(s); |
| 3211 |
> |
finally |
| 3212 |
> |
s.free; |
| 3213 |
> |
end; |
| 3214 |
> |
end; |
| 3215 |
> |
else |
| 3216 |
> |
IBError(ibxeNotSupported, [nil]); |
| 3217 |
> |
end; |
| 3218 |
> |
end; |
| 3219 |
> |
end; |
| 3220 |
> |
end; |
| 3221 |
> |
end; |
| 3222 |
> |
|
| 3223 |
> |
procedure TIBCustomDataSet.ReQuery; |
| 3224 |
> |
begin |
| 3225 |
> |
FQSelect.Close; |
| 3226 |
> |
ClearBlobCache; |
| 3227 |
> |
FCurrentRecord := -1; |
| 3228 |
> |
FRecordCount := 0; |
| 3229 |
> |
FDeletedRecords := 0; |
| 3230 |
> |
FBPos := 0; |
| 3231 |
> |
FOBPos := 0; |
| 3232 |
> |
FBEnd := 0; |
| 3233 |
> |
FOBEnd := 0; |
| 3234 |
> |
FQSelect.Close; |
| 3235 |
> |
FQSelect.ExecQuery; |
| 3236 |
> |
FOpen := FQSelect.Open; |
| 3237 |
> |
First; |
| 3238 |
> |
end; |
| 3239 |
> |
|
| 3240 |
> |
procedure TIBCustomDataSet.InternalOpen; |
| 3241 |
> |
var |
| 3242 |
> |
SetCursor: Boolean; |
| 3243 |
> |
|
| 3244 |
> |
function RecordDataLength(n: Integer): Long; |
| 3245 |
> |
begin |
| 3246 |
> |
result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData)); |
| 3247 |
> |
end; |
| 3248 |
> |
|
| 3249 |
> |
begin |
| 3250 |
> |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 3251 |
> |
if SetCursor then |
| 3252 |
> |
Screen.Cursor := crHourGlass; |
| 3253 |
> |
try |
| 3254 |
> |
ActivateConnection; |
| 3255 |
> |
ActivateTransaction; |
| 3256 |
> |
if FQSelect.SQL.Text = '' then |
| 3257 |
> |
IBError(ibxeEmptyQuery, [nil]); |
| 3258 |
> |
if not FInternalPrepared then |
| 3259 |
> |
InternalPrepare; |
| 3260 |
> |
if FQSelect.SQLType = SQLSelect then |
| 3261 |
> |
begin |
| 3262 |
> |
if DefaultFields then |
| 3263 |
> |
CreateFields; |
| 3264 |
> |
BindFields(True); |
| 3265 |
> |
FCurrentRecord := -1; |
| 3266 |
> |
FQSelect.ExecQuery; |
| 3267 |
> |
FOpen := FQSelect.Open; |
| 3268 |
> |
|
| 3269 |
> |
{ Initialize offsets, buffer sizes, etc... |
| 3270 |
> |
1. Initially FRecordSize is just the "RecordDataLength". |
| 3271 |
> |
2. Allocate a "model" buffer and do a dummy fetch |
| 3272 |
> |
3. After the dummy fetch, FRecordSize will be appropriately |
| 3273 |
> |
adjusted to reflect the additional "weight" of the field |
| 3274 |
> |
data. |
| 3275 |
> |
4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize. |
| 3276 |
> |
5. Now, with the BufferSize available, allocate memory for chunks of records |
| 3277 |
> |
6. Re-allocate the model buffer, accounting for the new |
| 3278 |
> |
FRecordBufferSize. |
| 3279 |
> |
7. Finally, calls to AllocRecordBuffer will work!. |
| 3280 |
> |
} |
| 3281 |
> |
{Step 1} |
| 3282 |
> |
FRecordSize := RecordDataLength(FQSelect.Current.Count); |
| 3283 |
> |
{Step 2, 3} |
| 3284 |
> |
IBAlloc(FModelBuffer, 0, FRecordSize); |
| 3285 |
> |
FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer); |
| 3286 |
> |
{Step 4} |
| 3287 |
> |
FCalcFieldsOffset := FRecordSize; |
| 3288 |
> |
FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize; |
| 3289 |
> |
FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream))); |
| 3290 |
> |
{Step 5} |
| 3291 |
> |
if UniDirectional then |
| 3292 |
> |
FBufferChunkSize := FRecordBufferSize * UniCache |
| 3293 |
> |
else |
| 3294 |
> |
FBufferChunkSize := FRecordBufferSize * BufferChunks; |
| 3295 |
> |
IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize); |
| 3296 |
> |
if FCachedUpdates or (csReading in ComponentState) then |
| 3297 |
> |
IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize); |
| 3298 |
> |
FBPos := 0; |
| 3299 |
> |
FOBPos := 0; |
| 3300 |
> |
FBEnd := 0; |
| 3301 |
> |
FOBEnd := 0; |
| 3302 |
> |
FCacheSize := FBufferChunkSize; |
| 3303 |
> |
FOldCacheSize := FBufferChunkSize; |
| 3304 |
> |
{Step 6} |
| 3305 |
> |
IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count), |
| 3306 |
> |
FRecordBufferSize); |
| 3307 |
> |
{Step 7} |
| 3308 |
> |
FOldBuffer := AllocRecordBuffer; |
| 3309 |
> |
end |
| 3310 |
> |
else |
| 3311 |
> |
FQSelect.ExecQuery; |
| 3312 |
> |
finally |
| 3313 |
> |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 3314 |
> |
Screen.Cursor := crDefault; |
| 3315 |
> |
end; |
| 3316 |
> |
end; |
| 3317 |
> |
|
| 3318 |
> |
procedure TIBCustomDataSet.InternalPost; |
| 3319 |
> |
var |
| 3320 |
> |
Qry: TIBSQL; |
| 3321 |
> |
Buff: PChar; |
| 3322 |
> |
SetCursor: Boolean; |
| 3323 |
> |
bInserting: Boolean; |
| 3324 |
> |
begin |
| 3325 |
> |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 3326 |
> |
if SetCursor then |
| 3327 |
> |
Screen.Cursor := crHourGlass; |
| 3328 |
> |
try |
| 3329 |
> |
Buff := GetActiveBuf; |
| 3330 |
> |
CheckEditState; |
| 3331 |
> |
AdjustRecordOnInsert(Buff); |
| 3332 |
> |
if (State = dsInsert) then |
| 3333 |
> |
begin |
| 3334 |
> |
bInserting := True; |
| 3335 |
> |
Qry := FQInsert; |
| 3336 |
> |
PRecordData(Buff)^.rdUpdateStatus := usInserted; |
| 3337 |
> |
PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted; |
| 3338 |
> |
WriteRecordCache(FRecordCount, Buff); |
| 3339 |
> |
FCurrentRecord := FRecordCount; |
| 3340 |
> |
end |
| 3341 |
> |
else begin |
| 3342 |
> |
bInserting := False; |
| 3343 |
> |
Qry := FQModify; |
| 3344 |
> |
if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then |
| 3345 |
> |
begin |
| 3346 |
> |
PRecordData(Buff)^.rdUpdateStatus := usModified; |
| 3347 |
> |
PRecordData(Buff)^.rdCachedUpdateStatus := cusModified; |
| 3348 |
> |
end |
| 3349 |
> |
else if PRecordData(Buff)^. |
| 3350 |
> |
rdCachedUpdateStatus = cusUninserted then |
| 3351 |
> |
begin |
| 3352 |
> |
PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted; |
| 3353 |
> |
Dec(FDeletedRecords); |
| 3354 |
> |
end; |
| 3355 |
> |
end; |
| 3356 |
> |
if (not CachedUpdates) then |
| 3357 |
> |
InternalPostRecord(Qry, Buff) |
| 3358 |
> |
else begin |
| 3359 |
> |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 3360 |
> |
FUpdatesPending := True; |
| 3361 |
> |
end; |
| 3362 |
> |
if bInserting then |
| 3363 |
> |
Inc(FRecordCount); |
| 3364 |
> |
finally |
| 3365 |
> |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 3366 |
> |
Screen.Cursor := crDefault; |
| 3367 |
> |
end; |
| 3368 |
> |
end; |
| 3369 |
> |
|
| 3370 |
> |
procedure TIBCustomDataSet.InternalRefresh; |
| 3371 |
> |
begin |
| 3372 |
> |
inherited InternalRefresh; |
| 3373 |
> |
InternalRefreshRow; |
| 3374 |
> |
end; |
| 3375 |
> |
|
| 3376 |
> |
procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar); |
| 3377 |
> |
begin |
| 3378 |
> |
InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber)); |
| 3379 |
> |
end; |
| 3380 |
> |
|
| 3381 |
> |
function TIBCustomDataSet.IsCursorOpen: Boolean; |
| 3382 |
> |
begin |
| 3383 |
> |
result := FOpen; |
| 3384 |
> |
end; |
| 3385 |
> |
|
| 3386 |
> |
function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant; |
| 3387 |
> |
Options: TLocateOptions): Boolean; |
| 3388 |
> |
var |
| 3389 |
> |
{$IF FPC_FULLVERSION >= 20700 } |
| 3390 |
> |
CurBookmark: TBookmark; |
| 3391 |
> |
{$ELSE} |
| 3392 |
> |
CurBookmark: string; |
| 3393 |
> |
{$ENDIF} |
| 3394 |
> |
begin |
| 3395 |
> |
DisableControls; |
| 3396 |
> |
try |
| 3397 |
> |
CurBookmark := Bookmark; |
| 3398 |
> |
First; |
| 3399 |
> |
result := InternalLocate(KeyFields, KeyValues, Options); |
| 3400 |
> |
if not result then |
| 3401 |
> |
Bookmark := CurBookmark; |
| 3402 |
> |
finally |
| 3403 |
> |
EnableControls; |
| 3404 |
> |
end; |
| 3405 |
> |
end; |
| 3406 |
> |
|
| 3407 |
> |
function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant; |
| 3408 |
> |
const ResultFields: string): Variant; |
| 3409 |
> |
var |
| 3410 |
> |
fl: TList; |
| 3411 |
> |
{$IF FPC_FULLVERSION >= 20700 } |
| 3412 |
> |
CurBookmark: TBookmark; |
| 3413 |
> |
{$ELSE} |
| 3414 |
> |
CurBookmark: string; |
| 3415 |
> |
{$ENDIF} |
| 3416 |
> |
begin |
| 3417 |
> |
DisableControls; |
| 3418 |
> |
fl := TList.Create; |
| 3419 |
> |
CurBookmark := Bookmark; |
| 3420 |
> |
try |
| 3421 |
> |
First; |
| 3422 |
> |
if InternalLocate(KeyFields, KeyValues, []) then |
| 3423 |
> |
begin |
| 3424 |
> |
if (ResultFields <> '') then |
| 3425 |
> |
result := FieldValues[ResultFields] |
| 3426 |
> |
else |
| 3427 |
> |
result := NULL; |
| 3428 |
> |
end |
| 3429 |
> |
else |
| 3430 |
> |
result := Null; |
| 3431 |
> |
finally |
| 3432 |
> |
Bookmark := CurBookmark; |
| 3433 |
> |
fl.Free; |
| 3434 |
> |
EnableControls; |
| 3435 |
> |
end; |
| 3436 |
> |
end; |
| 3437 |
> |
|
| 3438 |
> |
procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer); |
| 3439 |
> |
begin |
| 3440 |
> |
PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^; |
| 3441 |
> |
end; |
| 3442 |
> |
|
| 3443 |
> |
procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); |
| 3444 |
> |
begin |
| 3445 |
> |
PRecordData(Buffer)^.rdBookmarkFlag := Value; |
| 3446 |
> |
end; |
| 3447 |
> |
|
| 3448 |
> |
procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean); |
| 3449 |
> |
begin |
| 3450 |
> |
if not Value and FCachedUpdates then |
| 3451 |
> |
CancelUpdates; |
| 3452 |
> |
if (not (csReading in ComponentState)) and Value then |
| 3453 |
> |
CheckDatasetClosed; |
| 3454 |
> |
FCachedUpdates := Value; |
| 3455 |
> |
end; |
| 3456 |
> |
|
| 3457 |
> |
procedure TIBCustomDataSet.SetDataSource(Value: TDataSource); |
| 3458 |
> |
begin |
| 3459 |
> |
if IsLinkedTo(Value) then |
| 3460 |
> |
IBError(ibxeCircularReference, [nil]); |
| 3461 |
> |
if FDataLink <> nil then |
| 3462 |
> |
FDataLink.DataSource := Value; |
| 3463 |
> |
end; |
| 3464 |
> |
|
| 3465 |
> |
procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer); |
| 3466 |
> |
var |
| 3467 |
> |
Buff, TmpBuff: PChar; |
| 3468 |
> |
begin |
| 3469 |
> |
Buff := GetActiveBuf; |
| 3470 |
> |
if Field.FieldNo < 0 then |
| 3471 |
> |
begin |
| 3472 |
> |
TmpBuff := Buff + FRecordSize + Field.Offset; |
| 3473 |
> |
Boolean(TmpBuff[0]) := LongBool(Buffer); |
| 3474 |
> |
if Boolean(TmpBuff[0]) then |
| 3475 |
> |
Move(Buffer^, TmpBuff[1], Field.DataSize); |
| 3476 |
> |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff); |
| 3477 |
> |
end |
| 3478 |
> |
else begin |
| 3479 |
> |
CheckEditState; |
| 3480 |
> |
with PRecordData(Buff)^ do |
| 3481 |
> |
begin |
| 3482 |
> |
{ If inserting, Adjust record position } |
| 3483 |
> |
AdjustRecordOnInsert(Buff); |
| 3484 |
> |
if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and |
| 3485 |
> |
(FMappedFieldPosition[Field.FieldNo - 1] <= rdFieldCount) then |
| 3486 |
> |
begin |
| 3487 |
> |
Field.Validate(Buffer); |
| 3488 |
> |
if (Buffer = nil) or |
| 3489 |
> |
(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then |
| 3490 |
> |
rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull := True |
| 3491 |
> |
else begin |
| 3492 |
> |
Move(Buffer^, Buff[rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs], |
| 3493 |
> |
rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataSize); |
| 3494 |
> |
if (rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataType = SQL_TEXT) or |
| 3495 |
> |
(rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataType = SQL_VARYING) then |
| 3496 |
> |
rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataLength := StrLen(PChar(Buffer)); |
| 3497 |
> |
rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull := False; |
| 3498 |
> |
if rdUpdateStatus = usUnmodified then |
| 3499 |
> |
begin |
| 3500 |
> |
if CachedUpdates then |
| 3501 |
> |
begin |
| 3502 |
> |
FUpdatesPending := True; |
| 3503 |
> |
if State = dsInsert then |
| 3504 |
> |
rdCachedUpdateStatus := cusInserted |
| 3505 |
> |
else if State = dsEdit then |
| 3506 |
> |
rdCachedUpdateStatus := cusModified; |
| 3507 |
> |
end; |
| 3508 |
> |
|
| 3509 |
> |
if State = dsInsert then |
| 3510 |
> |
rdUpdateStatus := usInserted |
| 3511 |
> |
else |
| 3512 |
> |
rdUpdateStatus := usModified; |
| 3513 |
> |
end; |
| 3514 |
> |
WriteRecordCache(rdRecordNumber, Buff); |
| 3515 |
> |
SetModified(True); |
| 3516 |
> |
end; |
| 3517 |
> |
end; |
| 3518 |
> |
end; |
| 3519 |
> |
end; |
| 3520 |
> |
if not (State in [dsCalcFields, dsFilter, dsNewValue]) then |
| 3521 |
> |
DataEvent(deFieldChange, PtrInt(Field)); |
| 3522 |
> |
end; |
| 3523 |
> |
|
| 3524 |
> |
procedure TIBCustomDataSet.SetRecNo(Value: Integer); |
| 3525 |
> |
begin |
| 3526 |
> |
CheckBrowseMode; |
| 3527 |
> |
if (Value < 1) then |
| 3528 |
> |
Value := 1 |
| 3529 |
> |
else if Value > FRecordCount then |
| 3530 |
> |
begin |
| 3531 |
> |
InternalLast; |
| 3532 |
> |
Value := Min(FRecordCount, Value); |
| 3533 |
> |
end; |
| 3534 |
> |
if (Value <> RecNo) then |
| 3535 |
> |
begin |
| 3536 |
> |
DoBeforeScroll; |
| 3537 |
> |
FCurrentRecord := Value - 1; |
| 3538 |
> |
Resync([]); |
| 3539 |
> |
DoAfterScroll; |
| 3540 |
> |
end; |
| 3541 |
> |
end; |
| 3542 |
> |
|
| 3543 |
> |
procedure TIBCustomDataSet.Disconnect; |
| 3544 |
> |
begin |
| 3545 |
> |
Close; |
| 3546 |
> |
InternalUnPrepare; |
| 3547 |
> |
end; |
| 3548 |
> |
|
| 3549 |
> |
procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode); |
| 3550 |
> |
begin |
| 3551 |
> |
if not CanModify then |
| 3552 |
> |
IBError(ibxeCannotUpdate, [nil]) |
| 3553 |
> |
else |
| 3554 |
> |
FUpdateMode := Value; |
| 3555 |
> |
end; |
| 3556 |
> |
|
| 3557 |
> |
|
| 3558 |
> |
procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject); |
| 3559 |
> |
begin |
| 3560 |
> |
if Value <> FUpdateObject then |
| 3561 |
> |
begin |
| 3562 |
> |
if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then |
| 3563 |
> |
FUpdateObject.DataSet := nil; |
| 3564 |
> |
FUpdateObject := Value; |
| 3565 |
> |
if Assigned(FUpdateObject) then |
| 3566 |
> |
begin |
| 3567 |
> |
if Assigned(FUpdateObject.DataSet) and |
| 3568 |
> |
(FUpdateObject.DataSet <> Self) then |
| 3569 |
> |
FUpdateObject.DataSet.UpdateObject := nil; |
| 3570 |
> |
FUpdateObject.DataSet := Self; |
| 3571 |
> |
end; |
| 3572 |
> |
end; |
| 3573 |
> |
end; |
| 3574 |
> |
|
| 3575 |
> |
function TIBCustomDataSet.ConstraintsStored: Boolean; |
| 3576 |
> |
begin |
| 3577 |
> |
Result := Constraints.Count > 0; |
| 3578 |
> |
end; |
| 3579 |
> |
|
| 3580 |
> |
procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar); |
| 3581 |
> |
begin |
| 3582 |
> |
FillChar(Buffer[FRecordSize], CalcFieldsSize, 0); |
| 3583 |
> |
end; |
| 3584 |
> |
|
| 3585 |
> |
|
| 3586 |
> |
procedure TIBCustomDataSet.InternalUnPrepare; |
| 3587 |
> |
begin |
| 3588 |
> |
if FInternalPrepared then |
| 3589 |
> |
begin |
| 3590 |
> |
CheckDatasetClosed; |
| 3591 |
> |
FieldDefs.Clear; |
| 3592 |
> |
FInternalPrepared := False; |
| 3593 |
> |
end; |
| 3594 |
> |
end; |
| 3595 |
> |
|
| 3596 |
> |
procedure TIBCustomDataSet.InternalExecQuery; |
| 3597 |
> |
var |
| 3598 |
> |
DidActivate: Boolean; |
| 3599 |
> |
SetCursor: Boolean; |
| 3600 |
> |
begin |
| 3601 |
> |
DidActivate := False; |
| 3602 |
> |
SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault); |
| 3603 |
> |
if SetCursor then |
| 3604 |
> |
Screen.Cursor := crHourGlass; |
| 3605 |
> |
try |
| 3606 |
> |
ActivateConnection; |
| 3607 |
> |
DidActivate := ActivateTransaction; |
| 3608 |
> |
if FQSelect.SQL.Text = '' then |
| 3609 |
> |
IBError(ibxeEmptyQuery, [nil]); |
| 3610 |
> |
if not FInternalPrepared then |
| 3611 |
> |
InternalPrepare; |
| 3612 |
> |
if FQSelect.SQLType = SQLSelect then |
| 3613 |
> |
begin |
| 3614 |
> |
IBError(ibxeIsASelectStatement, [nil]); |
| 3615 |
> |
end |
| 3616 |
> |
else |
| 3617 |
> |
FQSelect.ExecQuery; |
| 3618 |
> |
finally |
| 3619 |
> |
if DidActivate then |
| 3620 |
> |
DeactivateTransaction; |
| 3621 |
> |
if SetCursor and (Screen.Cursor = crHourGlass) then |
| 3622 |
> |
Screen.Cursor := crDefault; |
| 3623 |
> |
end; |
| 3624 |
> |
end; |
| 3625 |
> |
|
| 3626 |
> |
function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE; |
| 3627 |
> |
begin |
| 3628 |
> |
Result := FQSelect.Handle; |
| 3629 |
> |
end; |
| 3630 |
> |
|
| 3631 |
> |
procedure TIBCustomDataSet.InitRecord(Buffer: PChar); |
| 3632 |
> |
begin |
| 3633 |
> |
inherited InitRecord(Buffer); |
| 3634 |
> |
with PRecordData(Buffer)^ do |
| 3635 |
> |
begin |
| 3636 |
> |
rdUpdateStatus := TUpdateStatus(usInserted); |
| 3637 |
> |
rdBookMarkFlag := bfInserted; |
| 3638 |
> |
rdRecordNumber := -1; |
| 3639 |
> |
end; |
| 3640 |
> |
end; |
| 3641 |
> |
|
| 3642 |
> |
procedure TIBCustomDataSet.InternalInsert; |
| 3643 |
> |
begin |
| 3644 |
> |
CursorPosChanged; |
| 3645 |
> |
end; |
| 3646 |
> |
|
| 3647 |
> |
{ TIBDataSet IProviderSupport } |
| 3648 |
> |
|
| 3649 |
> |
(*procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean); |
| 3650 |
> |
begin |
| 3651 |
> |
if Commit then |
| 3652 |
> |
Transaction.Commit else |
| 3653 |
> |
Transaction.Rollback; |
| 3654 |
> |
end; |
| 3655 |
> |
|
| 3656 |
> |
function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams; |
| 3657 |
> |
ResultSet: Pointer = nil): Integer; |
| 3658 |
> |
var |
| 3659 |
> |
FQuery: TIBQuery; |
| 3660 |
> |
begin |
| 3661 |
> |
if Assigned(ResultSet) then |
| 3662 |
> |
begin |
| 3663 |
> |
TDataSet(ResultSet^) := TIBQuery.Create(nil); |
| 3664 |
> |
with TIBQuery(ResultSet^) do |
| 3665 |
> |
begin |
| 3666 |
> |
SQL.Text := ASQL; |
| 3667 |
> |
Params.Assign(AParams); |
| 3668 |
> |
Open; |
| 3669 |
> |
Result := RowsAffected; |
| 3670 |
> |
end; |
| 3671 |
> |
end |
| 3672 |
> |
else |
| 3673 |
> |
begin |
| 3674 |
> |
FQuery := TIBQuery.Create(nil); |
| 3675 |
> |
try |
| 3676 |
> |
FQuery.Database := Database; |
| 3677 |
> |
FQuery.Transaction := Transaction; |
| 3678 |
> |
FQuery.GenerateParamNames := True; |
| 3679 |
> |
FQuery.SQL.Text := ASQL; |
| 3680 |
> |
FQuery.Params.Assign(AParams); |
| 3681 |
> |
FQuery.ExecSQL; |
| 3682 |
> |
Result := FQuery.RowsAffected; |
| 3683 |
> |
finally |
| 3684 |
> |
FQuery.Free; |
| 3685 |
> |
end; |
| 3686 |
> |
end; |
| 3687 |
> |
end; |
| 3688 |
> |
|
| 3689 |
> |
function TIBCustomDataSet.PSGetQuoteChar: string; |
| 3690 |
> |
begin |
| 3691 |
> |
if Database.SQLDialect = 3 then |
| 3692 |
> |
Result := '"' else |
| 3693 |
> |
Result := ''; |
| 3694 |
> |
end; |
| 3695 |
> |
|
| 3696 |
> |
function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; |
| 3697 |
> |
var |
| 3698 |
> |
PrevErr: Integer; |
| 3699 |
> |
begin |
| 3700 |
> |
if Prev <> nil then |
| 3701 |
> |
PrevErr := Prev.ErrorCode else |
| 3702 |
> |
PrevErr := 0; |
| 3703 |
> |
if E is EIBError then |
| 3704 |
> |
with EIBError(E) do |
| 3705 |
> |
Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else |
| 3706 |
> |
Result := inherited PSGetUpdateException(E, Prev); |
| 3707 |
> |
end; |
| 3708 |
> |
|
| 3709 |
> |
function TIBCustomDataSet.PSInTransaction: Boolean; |
| 3710 |
> |
begin |
| 3711 |
> |
Result := Transaction.InTransaction; |
| 3712 |
> |
end; |
| 3713 |
> |
|
| 3714 |
> |
function TIBCustomDataSet.PSIsSQLBased: Boolean; |
| 3715 |
> |
begin |
| 3716 |
> |
Result := True; |
| 3717 |
> |
end; |
| 3718 |
> |
|
| 3719 |
> |
function TIBCustomDataSet.PSIsSQLSupported: Boolean; |
| 3720 |
> |
begin |
| 3721 |
> |
Result := True; |
| 3722 |
> |
end; |
| 3723 |
> |
|
| 3724 |
> |
procedure TIBCustomDataSet.PSReset; |
| 3725 |
> |
begin |
| 3726 |
> |
inherited PSReset; |
| 3727 |
> |
if Active then |
| 3728 |
> |
begin |
| 3729 |
> |
Close; |
| 3730 |
> |
Open; |
| 3731 |
> |
end; |
| 3732 |
> |
end; |
| 3733 |
> |
|
| 3734 |
> |
function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; |
| 3735 |
> |
var |
| 3736 |
> |
UpdateAction: TIBUpdateAction; |
| 3737 |
> |
SQL: string; |
| 3738 |
> |
Params: TParams; |
| 3739 |
> |
|
| 3740 |
> |
procedure AssignParams(DataSet: TDataSet; Params: TParams); |
| 3741 |
> |
var |
| 3742 |
> |
I: Integer; |
| 3743 |
> |
Old: Boolean; |
| 3744 |
> |
Param: TParam; |
| 3745 |
> |
PName: string; |
| 3746 |
> |
Field: TField; |
| 3747 |
> |
Value: Variant; |
| 3748 |
> |
begin |
| 3749 |
> |
for I := 0 to Params.Count - 1 do |
| 3750 |
> |
begin |
| 3751 |
> |
Param := Params[I]; |
| 3752 |
> |
PName := Param.Name; |
| 3753 |
> |
Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize} |
| 3754 |
> |
if Old then System.Delete(PName, 1, 4); |
| 3755 |
> |
Field := DataSet.FindField(PName); |
| 3756 |
> |
if not Assigned(Field) then Continue; |
| 3757 |
> |
if Old then Param.AssignFieldValue(Field, Field.OldValue) else |
| 3758 |
> |
begin |
| 3759 |
> |
Value := Field.NewValue; |
| 3760 |
> |
if VarIsEmpty(Value) then Value := Field.OldValue; |
| 3761 |
> |
Param.AssignFieldValue(Field, Value); |
| 3762 |
> |
end; |
| 3763 |
> |
end; |
| 3764 |
> |
end; |
| 3765 |
> |
|
| 3766 |
> |
begin |
| 3767 |
> |
Result := False; |
| 3768 |
> |
if Assigned(OnUpdateRecord) then |
| 3769 |
> |
begin |
| 3770 |
> |
UpdateAction := uaFail; |
| 3771 |
> |
if Assigned(FOnUpdateRecord) then |
| 3772 |
> |
begin |
| 3773 |
> |
FOnUpdateRecord(Delta, UpdateKind, UpdateAction); |
| 3774 |
> |
Result := UpdateAction = uaApplied; |
| 3775 |
> |
end; |
| 3776 |
> |
end |
| 3777 |
> |
else if Assigned(FUpdateObject) then |
| 3778 |
> |
begin |
| 3779 |
> |
SQL := FUpdateObject.GetSQL(UpdateKind).Text; |
| 3780 |
> |
if SQL <> '' then |
| 3781 |
> |
begin |
| 3782 |
> |
Params := TParams.Create; |
| 3783 |
> |
try |
| 3784 |
> |
Params.ParseSQL(SQL, True); |
| 3785 |
> |
AssignParams(Delta, Params); |
| 3786 |
> |
if PSExecuteStatement(SQL, Params) = 0 then |
| 3787 |
> |
IBError(ibxeNoRecordsAffected, [nil]); |
| 3788 |
> |
Result := True; |
| 3789 |
> |
finally |
| 3790 |
> |
Params.Free; |
| 3791 |
> |
end; |
| 3792 |
> |
end; |
| 3793 |
> |
end; |
| 3794 |
> |
end; |
| 3795 |
> |
|
| 3796 |
> |
procedure TIBCustomDataSet.PSStartTransaction; |
| 3797 |
> |
begin |
| 3798 |
> |
ActivateConnection; |
| 3799 |
> |
Transaction.StartTransaction; |
| 3800 |
> |
end; |
| 3801 |
> |
|
| 3802 |
> |
function TIBCustomDataSet.PSGetTableName: string; |
| 3803 |
> |
begin |
| 3804 |
> |
// if not FInternalPrepared then |
| 3805 |
> |
// InternalPrepare; |
| 3806 |
> |
{ It is possible for the FQSelectSQL to be unprepared |
| 3807 |
> |
with FInternalPreprepared being true (see DoBeforeTransactionEnd). |
| 3808 |
> |
So check the Prepared of the SelectSQL instead } |
| 3809 |
> |
if not FQSelect.Prepared then |
| 3810 |
> |
FQSelect.Prepare; |
| 3811 |
> |
Result := FQSelect.UniqueRelationName; |
| 3812 |
> |
end;*) |
| 3813 |
> |
|
| 3814 |
> |
procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput); |
| 3815 |
> |
begin |
| 3816 |
> |
InternalBatchInput(InputObject); |
| 3817 |
> |
end; |
| 3818 |
> |
|
| 3819 |
> |
procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput); |
| 3820 |
> |
begin |
| 3821 |
> |
InternalBatchOutput(OutputObject); |
| 3822 |
> |
end; |
| 3823 |
> |
|
| 3824 |
> |
procedure TIBDataSet.ExecSQL; |
| 3825 |
> |
begin |
| 3826 |
> |
InternalExecQuery; |
| 3827 |
> |
end; |
| 3828 |
> |
|
| 3829 |
> |
procedure TIBDataSet.Prepare; |
| 3830 |
> |
begin |
| 3831 |
> |
InternalPrepare; |
| 3832 |
> |
end; |
| 3833 |
> |
|
| 3834 |
> |
procedure TIBDataSet.UnPrepare; |
| 3835 |
> |
begin |
| 3836 |
> |
InternalUnPrepare; |
| 3837 |
> |
end; |
| 3838 |
> |
|
| 3839 |
> |
function TIBDataSet.GetPrepared: Boolean; |
| 3840 |
> |
begin |
| 3841 |
> |
Result := InternalPrepared; |
| 3842 |
> |
end; |
| 3843 |
> |
|
| 3844 |
> |
procedure TIBDataSet.InternalOpen; |
| 3845 |
> |
begin |
| 3846 |
> |
ActivateConnection; |
| 3847 |
> |
ActivateTransaction; |
| 3848 |
> |
InternalSetParamsFromCursor; |
| 3849 |
> |
Inherited InternalOpen; |
| 3850 |
> |
end; |
| 3851 |
> |
|
| 3852 |
> |
procedure TIBDataSet.SetFiltered(Value: Boolean); |
| 3853 |
> |
begin |
| 3854 |
> |
if(Filtered <> Value) then |
| 3855 |
> |
begin |
| 3856 |
> |
inherited SetFiltered(value); |
| 3857 |
> |
if Active then |
| 3858 |
> |
begin |
| 3859 |
> |
Close; |
| 3860 |
> |
Open; |
| 3861 |
> |
end; |
| 3862 |
> |
end |
| 3863 |
> |
else |
| 3864 |
> |
inherited SetFiltered(value); |
| 3865 |
> |
end; |
| 3866 |
> |
|
| 3867 |
> |
function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean; |
| 3868 |
> |
begin |
| 3869 |
> |
Result := false; |
| 3870 |
> |
if not Assigned(Bookmark) then |
| 3871 |
> |
exit; |
| 3872 |
> |
Result := PInteger(Bookmark)^ < FRecordCount; |
| 3873 |
> |
end; |
| 3874 |
> |
|
| 3875 |
> |
function TIBCustomDataSet.GetFieldData(Field: TField; |
| 3876 |
> |
Buffer: Pointer): Boolean; |
| 3877 |
> |
{$IFDEF TBCDFIELD_IS_BCD} |
| 3878 |
> |
var |
| 3879 |
> |
lTempCurr : System.Currency; |
| 3880 |
> |
begin |
| 3881 |
> |
if (Field.DataType = ftBCD) and (Buffer <> nil) then |
| 3882 |
> |
begin |
| 3883 |
> |
Result := InternalGetFieldData(Field, @lTempCurr); |
| 3884 |
> |
if Result then |
| 3885 |
> |
CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size); |
| 3886 |
> |
end |
| 3887 |
> |
else |
| 3888 |
> |
{$ELSE} |
| 3889 |
> |
begin |
| 3890 |
> |
{$ENDIF} |
| 3891 |
> |
Result := InternalGetFieldData(Field, Buffer); |
| 3892 |
> |
end; |
| 3893 |
> |
|
| 3894 |
> |
function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer; |
| 3895 |
> |
NativeFormat: Boolean): Boolean; |
| 3896 |
> |
begin |
| 3897 |
> |
if (Field.DataType = ftBCD) and not NativeFormat then |
| 3898 |
> |
Result := InternalGetFieldData(Field, Buffer) |
| 3899 |
> |
else |
| 3900 |
> |
Result := inherited GetFieldData(Field, Buffer, NativeFormat); |
| 3901 |
> |
end; |
| 3902 |
> |
|
| 3903 |
> |
procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer); |
| 3904 |
> |
{$IFDEF TDBDFIELD_IS_BCD} |
| 3905 |
> |
var |
| 3906 |
> |
lTempCurr : System.Currency; |
| 3907 |
> |
begin |
| 3908 |
> |
if (Field.DataType = ftBCD) and (Buffer <> nil) then |
| 3909 |
> |
begin |
| 3910 |
> |
BCDToCurr(TBCD(Buffer^), lTempCurr); |
| 3911 |
> |
InternalSetFieldData(Field, @lTempCurr); |
| 3912 |
> |
end |
| 3913 |
> |
else |
| 3914 |
> |
{$ELSE} |
| 3915 |
> |
begin |
| 3916 |
> |
{$ENDIF} |
| 3917 |
> |
InternalSetFieldData(Field, Buffer); |
| 3918 |
> |
end; |
| 3919 |
> |
|
| 3920 |
> |
procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer; |
| 3921 |
> |
NativeFormat: Boolean); |
| 3922 |
> |
begin |
| 3923 |
> |
if (not NativeFormat) and (Field.DataType = ftBCD) then |
| 3924 |
> |
InternalSetfieldData(Field, Buffer) |
| 3925 |
> |
else |
| 3926 |
> |
inherited SetFieldData(Field, buffer, NativeFormat); |
| 3927 |
> |
end; |
| 3928 |
> |
|
| 3929 |
> |
{ TIBDataSetUpdateObject } |
| 3930 |
> |
|
| 3931 |
> |
constructor TIBDataSetUpdateObject.Create(AOwner: TComponent); |
| 3932 |
> |
begin |
| 3933 |
> |
inherited Create(AOwner); |
| 3934 |
> |
FRefreshSQL := TStringList.Create; |
| 3935 |
> |
end; |
| 3936 |
> |
|
| 3937 |
> |
destructor TIBDataSetUpdateObject.Destroy; |
| 3938 |
> |
begin |
| 3939 |
> |
FRefreshSQL.Free; |
| 3940 |
> |
inherited Destroy; |
| 3941 |
> |
end; |
| 3942 |
> |
|
| 3943 |
> |
procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings); |
| 3944 |
> |
begin |
| 3945 |
> |
FRefreshSQL.Assign(Value); |
| 3946 |
> |
end; |
| 3947 |
> |
|
| 3948 |
> |
procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar); |
| 3949 |
> |
begin |
| 3950 |
> |
if not Assigned(DataSet) then Exit; |
| 3951 |
> |
DataSet.SetInternalSQLParams(Query, buff); |
| 3952 |
> |
end; |
| 3953 |
> |
|
| 3954 |
> |
{ TIBDSBlobStream } |
| 3955 |
> |
constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream; |
| 3956 |
> |
Mode: TBlobStreamMode); |
| 3957 |
> |
begin |
| 3958 |
> |
FField := AField; |
| 3959 |
> |
FBlobStream := ABlobStream; |
| 3960 |
> |
FBlobStream.Seek(0, soFromBeginning); |
| 3961 |
> |
if (Mode = bmWrite) then |
| 3962 |
> |
FBlobStream.Truncate; |
| 3963 |
> |
end; |
| 3964 |
> |
|
| 3965 |
> |
function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint; |
| 3966 |
> |
begin |
| 3967 |
> |
result := FBlobStream.Read(Buffer, Count); |
| 3968 |
> |
end; |
| 3969 |
> |
|
| 3970 |
> |
function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint; |
| 3971 |
> |
begin |
| 3972 |
> |
result := FBlobStream.Seek(Offset, Origin); |
| 3973 |
> |
end; |
| 3974 |
> |
|
| 3975 |
> |
procedure TIBDSBlobStream.SetSize(NewSize: Longint); |
| 3976 |
> |
begin |
| 3977 |
> |
FBlobStream.SetSize(NewSize); |
| 3978 |
> |
end; |
| 3979 |
> |
|
| 3980 |
> |
function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint; |
| 3981 |
> |
begin |
| 3982 |
> |
if not (FField.DataSet.State in [dsEdit, dsInsert]) then |
| 3983 |
> |
IBError(ibxeNotEditing, [nil]); |
| 3984 |
> |
TIBCustomDataSet(FField.DataSet).RecordModified(True); |
| 3985 |
> |
TBlobField(FField).Modified := true; |
| 3986 |
> |
result := FBlobStream.Write(Buffer, Count); |
| 3987 |
> |
TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField)); |
| 3988 |
> |
end; |
| 3989 |
> |
|
| 3990 |
> |
{ TIBGenerator } |
| 3991 |
> |
|
| 3992 |
> |
procedure TIBGenerator.SetIncrement(const AValue: integer); |
| 3993 |
> |
begin |
| 3994 |
> |
if AValue < 0 then |
| 3995 |
> |
raise Exception.Create('A Generator Increment cannot be negative'); |
| 3996 |
> |
FIncrement := AValue |
| 3997 |
> |
end; |
| 3998 |
> |
|
| 3999 |
> |
function TIBGenerator.GetNextValue(ADatabase: TIBDatabase; |
| 4000 |
> |
ATransaction: TIBTransaction): integer; |
| 4001 |
> |
begin |
| 4002 |
> |
with TIBSQL.Create(nil) do |
| 4003 |
> |
try |
| 4004 |
> |
Database := ADatabase; |
| 4005 |
> |
Transaction := ATransaction; |
| 4006 |
> |
if not assigned(Database) then |
| 4007 |
> |
IBError(ibxeCannotSetDatabase,[]); |
| 4008 |
> |
if not assigned(Transaction) then |
| 4009 |
> |
IBError(ibxeCannotSetTransaction,[]); |
| 4010 |
> |
with Transaction do |
| 4011 |
> |
if not InTransaction then StartTransaction; |
| 4012 |
> |
SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]); |
| 4013 |
> |
Prepare; |
| 4014 |
> |
ExecQuery; |
| 4015 |
> |
try |
| 4016 |
> |
Result := FieldByName('ID').AsInteger |
| 4017 |
> |
finally |
| 4018 |
> |
Close |
| 4019 |
> |
end; |
| 4020 |
> |
finally |
| 4021 |
> |
Free |
| 4022 |
> |
end; |
| 4023 |
> |
end; |
| 4024 |
> |
|
| 4025 |
> |
constructor TIBGenerator.Create(Owner: TIBCustomDataSet); |
| 4026 |
> |
begin |
| 4027 |
> |
FOwner := Owner; |
| 4028 |
> |
FIncrement := 1; |
| 4029 |
> |
end; |
| 4030 |
> |
|
| 4031 |
> |
|
| 4032 |
> |
procedure TIBGenerator.Apply; |
| 4033 |
> |
begin |
| 4034 |
> |
if (FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then |
| 4035 |
> |
Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction); |
| 4036 |
> |
end; |
| 4037 |
> |
|
| 4038 |
> |
end. |
