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