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{************************************************************************}
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{ }
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{ Borland Delphi Visual Component Library }
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{ InterBase Express core components }
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{ }
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{ Copyright (c) 1998-2000 Inprise Corporation }
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{ }
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{ InterBase Express is based in part on the product }
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{ Free IB Components, written by Gregory H. Deatz for }
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{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
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{ Free IB Components is used under license. }
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{ }
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{ The contents of this file are subject to the InterBase }
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{ Public License Version 1.0 (the "License"); you may not }
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{ use this file except in compliance with the License. You }
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{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
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{ Software distributed under the License is distributed on }
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{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
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{ express or implied. See the License for the specific language }
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{ governing rights and limitations under the License. }
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{ The Original Code was created by InterBase Software Corporation }
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{ and its successors. }
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{ Portions created by Inprise Corporation are Copyright (C) Inprise }
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{ Corporation. All Rights Reserved. }
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{ Contributor(s): Jeff Overcash }
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{ }
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{ IBX For Lazarus (Firebird Express) }
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{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
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{ Portions created by MWA Software are copyright McCallum Whyman }
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{ Associates Ltd 2011 - 2015 }
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{ }
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{************************************************************************}
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unit IBCustomDataSet;
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{$R-}
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{$IFDEF FPC}
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{$Mode Delphi}
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{$codepage UTF8}
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{$ENDIF}
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{$IFDEF DELPHI}
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{$DEFINE TDBDFIELD_IS_BCD}
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{$ENDIF}
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interface
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uses
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{$IFDEF WINDOWS }
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Windows,
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{$ENDIF}
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{$IFDEF UNIX}
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unix,
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{$ENDIF}
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SysUtils, Classes, IBDatabase, IBExternals, IB, IBSQL, Db,
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IBUtils, IBBlob, IBSQLParser, IBDatabaseInfo, fpTimer;
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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 }
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TIBDataSetUpdateObject = class(TComponent)
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private
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FRefreshSQL: TStrings;
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procedure SetRefreshSQL(value: TStrings);
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protected
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function GetDataSet: TIBCustomDataSet; virtual; abstract;
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procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
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procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
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function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
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procedure InternalSetParams(Params: ISQLParams; buff: PChar); overload;
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procedure InternalSetParams(Query: TIBSQL; buff: PChar); overload;
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procedure UpdateRecordFromQuery(UpdateKind: TUpdateKind; QryResults: IResults; Buffer: PChar);
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property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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function GetRowsAffected(var SelectCount, InsertCount, UpdateCount,
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DeleteCount: integer): boolean; virtual;
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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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TIBArrayField = class;
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{ TIBArray }
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{Wrapper class to support array cache in TIBCustomDataset and event handling}
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TIBArray = class
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private
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FArray: IArray;
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FRecNo: integer;
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FField: TIBArrayField;
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procedure EventHandler(Sender: IArray; Reason: TArrayEventReason);
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public
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constructor Create(aField: TIBArrayField; anArray: IArray);
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destructor Destroy; override;
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property ArrayIntf: IArray read FArray;
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end;
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TArrayDataArray = array [0..0] of TIBArray;
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PArrayDataArray = ^TArrayDataArray;
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{ TIBCustomDataSet }
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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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PFieldData = ^TFieldData;
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TFieldData = record
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fdIsNull: Boolean;
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fdDataLength: Short;
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end;
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PColumnData = ^TColumnData;
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TColumnData = record
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fdDataType: Short;
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fdDataScale: Short;
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fdNullable: Boolean;
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fdDataSize: Short;
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fdDataOfs: Integer;
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fdCodePage: TSystemCodePage;
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end;
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PFieldColumns = ^TFieldColumns;
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TFieldColumns = array[1..1] of TColumnData;
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TRecordData = record
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rdBookmarkFlag: TBookmarkFlag;
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rdFieldCount: Short;
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rdRecordNumber: Integer;
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rdCachedUpdateStatus: TCachedUpdateStatus;
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rdUpdateStatus: TUpdateStatus;
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rdSavedOffset: DWORD;
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rdDBKey: TIBDBKey;
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rdFields: array[1..1] of TFieldData;
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end;
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PRecordData = ^TRecordData;
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{ TIBArrayField }
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TIBArrayField = class(TField)
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private
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FArrayBounds: TArrayBounds;
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FArrayDimensions: integer;
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FRelationName: string;
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FCacheOffset: word;
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function GetArrayID: TISC_QUAD;
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function GetArrayIntf: IArray;
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procedure SetArrayIntf(AValue: IArray);
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protected
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class procedure CheckTypeSize(AValue: Longint); override;
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function GetAsString: string; override;
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function GetDataSize: Integer; override;
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procedure Bind(Binding: Boolean); override;
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public
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constructor Create(AOwner: TComponent); override;
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function CreateArray: IArray;
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property ArrayID: TISC_QUAD read GetArrayID;
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property ArrayIntf: IArray read GetArrayIntf write SetArrayIntf;
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property ArrayDimensions: integer read FArrayDimensions write FArrayDimensions;
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property ArrayBounds: TArrayBounds read FArrayBounds write FArrayBounds;
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end;
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{ TIBStringField allows us to have strings longer than 8196 }
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TIBStringField = class(TStringField)
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private
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FCharacterSetName: RawByteString;
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FCharacterSetSize: integer;
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FAutoFieldSize: boolean;
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FCodePage: TSystemCodePage;
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FDataSize: integer;
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protected
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procedure Bind(Binding: Boolean); 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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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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property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
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property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
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property CodePage: TSystemCodePage read FCodePage write FCodePage;
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published
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property AutoFieldSize: boolean read FAutoFieldSize write FAutoFieldSize default true;
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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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private
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FIdentityColumn: boolean;
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protected
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procedure Bind(Binding: Boolean); override;
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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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property IdentityColumn: boolean read FIdentityColumn;
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published
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property Size default 8;
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end;
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{The following integer field types extend the built in versions to enable IBX appplications
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to check for an Identity column}
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{ TIBSmallintField }
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TIBSmallintField = class(TSmallintField)
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private
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FIdentityColumn: boolean;
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protected
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procedure Bind(Binding: Boolean); override;
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public
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property IdentityColumn: boolean read FIdentityColumn;
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end;
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{ TIBIntegerField }
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TIBIntegerField = class(TIntegerField)
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private
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FIdentityColumn: boolean;
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protected
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procedure Bind(Binding: Boolean); override;
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public
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property IdentityColumn: boolean read FIdentityColumn;
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end;
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{ TIBLargeIntField }
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TIBLargeIntField = class(TLargeIntField)
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private
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FIdentityColumn: boolean;
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protected
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procedure Bind(Binding: Boolean); override;
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public
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property IdentityColumn: boolean read FIdentityColumn;
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end;
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{TIBMemoField}
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{Allows us to show truncated text in DBGrids and anything else that uses
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DisplayText}
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TIBMemoField = class(TMemoField)
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private
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FCharacterSetName: RawByteString;
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FCharacterSetSize: integer;
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FDisplayTextAsClassName: boolean;
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function GetTruncatedText: string;
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protected
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procedure Bind(Binding: Boolean); override;
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function GetAsString: string; override;
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function GetDefaultWidth: Longint; override;
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procedure GetText(var AText: string; ADisplayText: Boolean); override;
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procedure SetAsString(const AValue: string); override;
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public
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constructor Create(AOwner: TComponent); override;
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property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
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property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
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published
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property DisplayTextAsClassName: boolean read FDisplayTextAsClassName
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write FDisplayTextAsClassName;
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private
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FCodePage: TSystemCodePage;
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FFCodePage: TSystemCodePage;
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public
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property CodePage: TSystemCodePage read FFCodePage write FFCodePage;
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end;
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{ TIBDataLink }
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TIBDataLink = class(TDetailDataLink)
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private
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FDataSet: TIBCustomDataSet;
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FDelayTimerValue: integer;
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FTimer: TFPTimer;
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procedure HandleRefreshTimer(Sender: TObject);
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procedure SetDelayTimerValue(AValue: integer);
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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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property DelayTimerValue: integer {in Milliseconds}
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read FDelayTimerValue write SetDelayTimerValue;
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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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FQuery: TIBSQL;
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function GetDatabase: TIBDatabase;
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function GetTransaction: TIBTransaction;
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procedure SetDatabase(AValue: TIBDatabase);
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procedure SetGeneratorName(AValue: string);
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procedure SetIncrement(const AValue: integer);
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procedure SetTransaction(AValue: TIBTransaction);
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procedure SetQuerySQL;
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protected
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function GetNextValue: integer;
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public
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constructor Create(Owner: TIBCustomDataSet);
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destructor Destroy; override;
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procedure Apply;
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property Owner: TIBCustomDataSet read FOwner;
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property Database: TIBDatabase read GetDatabase write SetDatabase;
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property Transaction: TIBTransaction read GetTransaction write SetTransaction;
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published
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property Generator: string read FGeneratorName write SetGeneratorName;
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property Field: string read FFieldName write FFieldName;
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property Increment: integer read FIncrement write SetIncrement default 1;
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property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
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end;
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{TIBControlLink - Allows IB Aware controls to react to dataset state changes}
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TIBControlLink = class
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private
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FTIBDataSet: TIBCustomDataSet;
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procedure SetIBDataSet(AValue: TIBCustomDataSet);
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protected
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procedure UpdateSQL(Sender: TObject); virtual;
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procedure UpdateParams(Sender: TObject); virtual;
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public
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destructor Destroy; override;
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property IBDataSet: TIBCustomDataSet read FTIBDataSet write SetIBDataSet;
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end;
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TIBAutoCommit = (acDisabled, acCommitRetaining);
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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 TheUpdateAction: 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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TDataSetCloseAction = (dcDiscardChanges, dcSaveChanges);
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TOnValidatePost = procedure (Sender: TObject; var CancelPost: boolean) of object;
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TOnDeleteReturning = procedure (Sender: TObject; QryResults: IResults) of object;
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TIBCustomDataSet = class(TDataset)
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private
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FAllowAutoActivateTransaction: Boolean;
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FArrayFieldCount: integer;
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FArrayCacheOffset: integer;
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FAutoCommit: TIBAutoCommit;
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FEnableStatistics: boolean;
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FGenerateParamNames: Boolean;
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FGeneratorField: TIBGenerator;
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FNeedsRefresh: Boolean;
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FForcedRefresh: Boolean;
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FDidActivate: Boolean;
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FBase: TIBBase;
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FBlobCacheOffset: Integer;
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FBlobStreamList: TList;
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FArrayList: 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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FOnDeleteReturning: TOnDeleteReturning;
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FOnValidatePost: TOnValidatePost;
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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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FDatabaseInfo: TIBDatabaseInfo;
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FRecordBufferSize: Integer;
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FRecordCount: Integer;
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FRecordSize: Integer;
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FDataSetCloseAction: TDataSetCloseAction;
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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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FAliasNameMap: array of string;
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FAliasNameList: array of string;
|
453 |
FBaseSQLSelect: TStrings;
|
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FParser: TSelectSQLParser;
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FCloseAction: TTransactionAction;
|
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FInTransactionEnd: boolean;
|
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FIBLinks: TList;
|
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FFieldColumns: PFieldColumns;
|
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FBufferUpdatedOnQryReturn: boolean;
|
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FSelectCount: integer;
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FInsertCount: integer;
|
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FUpdateCount: integer;
|
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FDeleteCount: integer;
|
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procedure ColumnDataToBuffer(QryResults: IResults; ColumnIndex,
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FieldIndex: integer; Buffer: PChar);
|
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procedure InitModelBuffer(Qry: TIBSQL; Buffer: PChar);
|
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function GetSelectStmtIntf: IStatement;
|
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procedure SetUpdateMode(const Value: TUpdateMode);
|
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procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
|
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|
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function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
|
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procedure AdjustRecordOnInsert(Buffer: Pointer);
|
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function CanEdit: Boolean;
|
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function CanInsert: Boolean;
|
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function CanDelete: Boolean;
|
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function CanRefresh: Boolean;
|
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procedure CheckEditState;
|
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procedure ClearBlobCache;
|
479 |
procedure ClearArrayCache;
|
480 |
procedure ClearIBLinks;
|
481 |
procedure CopyRecordBuffer(Source, Dest: Pointer);
|
482 |
procedure DoBeforeDatabaseDisconnect(Sender: TObject);
|
483 |
procedure DoAfterDatabaseDisconnect(Sender: TObject);
|
484 |
procedure DoDatabaseFree(Sender: TObject);
|
485 |
procedure DoBeforeTransactionEnd(Sender: TObject; Action: TTransactionAction);
|
486 |
procedure DoAfterTransactionEnd(Sender: TObject);
|
487 |
procedure DoTransactionFree(Sender: TObject);
|
488 |
procedure DoDeleteReturning(QryResults: IResults);
|
489 |
procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
|
490 |
Buffer: PChar);
|
491 |
function GetDatabase: TIBDatabase;
|
492 |
function GetDeleteSQL: TStrings;
|
493 |
function GetInsertSQL: TStrings;
|
494 |
function GetSQLParams: ISQLParams;
|
495 |
function GetRefreshSQL: TStrings;
|
496 |
function GetSelectSQL: TStrings;
|
497 |
function GetStatementType: TIBSQLStatementTypes;
|
498 |
function GetModifySQL: TStrings;
|
499 |
function GetTransaction: TIBTransaction;
|
500 |
function GetParser: TSelectSQLParser;
|
501 |
procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
|
502 |
function InternalLocate(const KeyFields: string; const KeyValues: Variant;
|
503 |
Options: TLocateOptions): Boolean; virtual;
|
504 |
procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
|
505 |
procedure InternalRevertRecord(RecordNumber: Integer); virtual;
|
506 |
function IsVisible(Buffer: PChar): Boolean;
|
507 |
procedure RegisterIBLink(Sender: TIBControlLink);
|
508 |
procedure UnRegisterIBLink(Sender: TIBControlLink);
|
509 |
procedure SaveOldBuffer(Buffer: PChar);
|
510 |
procedure SetBufferChunks(Value: Integer);
|
511 |
procedure SetDatabase(Value: TIBDatabase);
|
512 |
procedure SetDeleteSQL(Value: TStrings);
|
513 |
procedure SetInsertSQL(Value: TStrings);
|
514 |
procedure SetInternalSQLParams(Params: ISQLParams; Buffer: Pointer);
|
515 |
procedure SetRefreshSQL(Value: TStrings);
|
516 |
procedure SetSelectSQL(Value: TStrings);
|
517 |
procedure SetModifySQL(Value: TStrings);
|
518 |
procedure SetTransaction(Value: TIBTransaction);
|
519 |
procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
|
520 |
procedure SetUniDirectional(Value: Boolean);
|
521 |
procedure UpdateRecordFromQuery(QryResults: IResults; Buffer: PChar);
|
522 |
procedure RefreshParams;
|
523 |
function AdjustPosition(FCache: PChar; Offset: DWORD;
|
524 |
Origin: Integer): DWORD;
|
525 |
procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
|
526 |
Buffer: PChar);
|
527 |
procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
|
528 |
ReadOldBuffer: Boolean);
|
529 |
procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
|
530 |
Buffer: PChar);
|
531 |
procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
|
532 |
function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
|
533 |
DoCheck: Boolean): TGetResult; virtual;
|
534 |
|
535 |
protected
|
536 |
function GetMasterDetailDelay: integer; virtual;
|
537 |
procedure SetMasterDetailDelay(AValue: integer); virtual;
|
538 |
procedure ActivateConnection;
|
539 |
function ActivateTransaction: Boolean;
|
540 |
procedure DeactivateTransaction;
|
541 |
procedure CheckDatasetClosed;
|
542 |
procedure CheckDatasetOpen;
|
543 |
function CreateParser: TSelectSQLParser; virtual;
|
544 |
procedure FieldDefsFromQuery(SourceQuery: TIBSQL);
|
545 |
function GetActiveBuf: PChar;
|
546 |
procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
|
547 |
procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
|
548 |
procedure InternalPrepare; virtual;
|
549 |
procedure InternalUnPrepare; virtual;
|
550 |
procedure InternalExecQuery; virtual;
|
551 |
procedure InternalRefreshRow; virtual;
|
552 |
procedure InternalSetParamsFromCursor; virtual;
|
553 |
procedure CheckNotUniDirectional;
|
554 |
procedure SQLChanging(Sender: TObject); virtual;
|
555 |
procedure SQLChanged(Sender: TObject); virtual;
|
556 |
|
557 |
{ IProviderSupport }
|
558 |
procedure PSEndTransaction(Commit: Boolean); override;
|
559 |
function PSExecuteStatement(const ASQL: string; AParams: TParams;
|
560 |
ResultSet: Pointer = nil): Integer; override;
|
561 |
function PsGetTableName: string; override;
|
562 |
function PSGetQuoteChar: string; override;
|
563 |
function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
|
564 |
function PSInTransaction: Boolean; override;
|
565 |
function PSIsSQLBased: Boolean; override;
|
566 |
function PSIsSQLSupported: Boolean; override;
|
567 |
procedure PSStartTransaction; override;
|
568 |
procedure PSReset; override;
|
569 |
function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
|
570 |
|
571 |
{ TDataSet support }
|
572 |
procedure InternalInsert; override;
|
573 |
procedure InitRecord(Buffer: PChar); override;
|
574 |
procedure Disconnect; virtual;
|
575 |
function ConstraintsStored: Boolean;
|
576 |
procedure ClearCalcFields(Buffer: PChar); override;
|
577 |
function AllocRecordBuffer: PChar; override;
|
578 |
procedure DoBeforeDelete; override;
|
579 |
procedure DoAfterDelete; override;
|
580 |
procedure DoBeforeEdit; override;
|
581 |
procedure DoAfterEdit; override;
|
582 |
procedure DoBeforeInsert; override;
|
583 |
procedure DoAfterInsert; override;
|
584 |
procedure DoBeforeClose; override;
|
585 |
procedure DoBeforeOpen; override;
|
586 |
procedure DoBeforePost; override;
|
587 |
procedure DoAfterPost; override;
|
588 |
procedure FreeRecordBuffer(var Buffer: PChar); override;
|
589 |
procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
|
590 |
function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
|
591 |
function GetCanModify: Boolean; override;
|
592 |
function GetDataSource: TDataSource; override;
|
593 |
function GetDBAliasName(FieldNo: integer): string;
|
594 |
function GetFieldDefFromAlias(aliasName: string): TFieldDef;
|
595 |
function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
|
596 |
function GetRecNo: Integer; override;
|
597 |
function GetRecord(Buffer: PChar; GetMode: TGetMode;
|
598 |
DoCheck: Boolean): TGetResult; override;
|
599 |
function GetRecordCount: Integer; override;
|
600 |
function GetRecordSize: Word; override;
|
601 |
procedure InternalAutoCommit;
|
602 |
procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
|
603 |
procedure InternalCancel; override;
|
604 |
procedure InternalClose; override;
|
605 |
procedure InternalDelete; override;
|
606 |
procedure InternalFirst; override;
|
607 |
function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
|
608 |
procedure InternalGotoBookmark(Bookmark: Pointer); override;
|
609 |
procedure InternalHandleException; override;
|
610 |
procedure InternalInitFieldDefs; override;
|
611 |
procedure InternalInitRecord(Buffer: PChar); override;
|
612 |
procedure InternalLast; override;
|
613 |
procedure InternalOpen; override;
|
614 |
procedure InternalPost; override;
|
615 |
procedure InternalRefresh; override;
|
616 |
procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
|
617 |
procedure InternalSetToRecord(Buffer: PChar); override;
|
618 |
function IsCursorOpen: Boolean; override;
|
619 |
procedure Loaded; override;
|
620 |
procedure ReQuery;
|
621 |
procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
|
622 |
procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
|
623 |
procedure SetCachedUpdates(Value: Boolean);
|
624 |
procedure SetDataSource(Value: TDataSource);
|
625 |
procedure SetGenerateParamNames(AValue: Boolean); virtual;
|
626 |
procedure SetFieldData(Field : TField; Buffer : Pointer); override;
|
627 |
procedure SetFieldData(Field : TField; Buffer : Pointer;
|
628 |
NativeFormat : Boolean); overload; override;
|
629 |
procedure SetRecNo(Value: Integer); override;
|
630 |
|
631 |
protected
|
632 |
{Likely to be made public by descendant classes}
|
633 |
property AutoCommit: TIBAutoCommit read FAutoCommit write FAutoCommit default acDisabled;
|
634 |
property SQLParams: ISQLParams read GetSQLParams;
|
635 |
property Params: ISQLParams read GetSQLParams;
|
636 |
property InternalPrepared: Boolean read FInternalPrepared;
|
637 |
property QDelete: TIBSQL read FQDelete;
|
638 |
property QInsert: TIBSQL read FQInsert;
|
639 |
property QRefresh: TIBSQL read FQRefresh;
|
640 |
property QSelect: TIBSQL read FQSelect;
|
641 |
property QModify: TIBSQL read FQModify;
|
642 |
property StatementType: TIBSQLStatementTypes read GetStatementType;
|
643 |
property SelectStmtHandle: IStatement read GetSelectStmtIntf;
|
644 |
|
645 |
{Likely to be made published by descendant classes}
|
646 |
property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
|
647 |
property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
|
648 |
property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
|
649 |
property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
|
650 |
property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
|
651 |
property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
|
652 |
property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
|
653 |
property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
|
654 |
property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
|
655 |
property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
|
656 |
property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
|
657 |
property Parser: TSelectSQLParser read GetParser;
|
658 |
property BaseSQLSelect: TStrings read FBaseSQLSelect;
|
659 |
|
660 |
property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
|
661 |
write FBeforeDatabaseDisconnect;
|
662 |
property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
|
663 |
write FAfterDatabaseDisconnect;
|
664 |
property DatabaseFree: TNotifyEvent read FDatabaseFree
|
665 |
write FDatabaseFree;
|
666 |
property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
|
667 |
write FBeforeTransactionEnd;
|
668 |
property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
|
669 |
write FAfterTransactionEnd;
|
670 |
property TransactionFree: TNotifyEvent read FTransactionFree
|
671 |
write FTransactionFree;
|
672 |
property OnValidatePost: TOnValidatePost read FOnValidatePost write FOnValidatePost;
|
673 |
|
674 |
public
|
675 |
constructor Create(AOwner: TComponent); override;
|
676 |
destructor Destroy; override;
|
677 |
procedure ApplyUpdates;
|
678 |
function CachedUpdateStatus: TCachedUpdateStatus;
|
679 |
procedure CancelUpdates;
|
680 |
function GetFieldPosition(AliasName: string): integer;
|
681 |
procedure FetchAll;
|
682 |
function LocateNext(const KeyFields: string; const KeyValues: Variant;
|
683 |
Options: TLocateOptions): Boolean;
|
684 |
procedure RecordModified(Value: Boolean);
|
685 |
procedure RevertRecord;
|
686 |
procedure Undelete;
|
687 |
procedure ResetParser; virtual;
|
688 |
function HasParser: boolean;
|
689 |
|
690 |
{ TDataSet support methods }
|
691 |
function BookmarkValid(Bookmark: TBookmark): Boolean; override;
|
692 |
function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
|
693 |
function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
|
694 |
function GetArray(Field: TIBArrayField): IArray;
|
695 |
procedure SetArrayIntf(AnArray: IArray; Field: TIBArrayField);
|
696 |
function GetCurrentRecord(Buffer: PChar): Boolean; override;
|
697 |
function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
|
698 |
function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
|
699 |
function GetFieldData(Field : TField; Buffer : Pointer;
|
700 |
NativeFormat : Boolean) : Boolean; overload; override;
|
701 |
property GenerateParamNames: Boolean read FGenerateParamNames write SetGenerateParamNames;
|
702 |
function Locate(const KeyFields: string; const KeyValues: Variant;
|
703 |
Options: TLocateOptions): Boolean; override;
|
704 |
function Lookup(const KeyFields: string; const KeyValues: Variant;
|
705 |
const ResultFields: string): Variant; override;
|
706 |
function UpdateStatus: TUpdateStatus; override;
|
707 |
function IsSequenced: Boolean; override;
|
708 |
procedure Post; override;
|
709 |
function ParamByName(ParamName: String): ISQLParam;
|
710 |
property ArrayFieldCount: integer read FArrayFieldCount;
|
711 |
property DatabaseInfo: TIBDatabaseInfo read FDatabaseInfo;
|
712 |
property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
|
713 |
property UpdatesPending: Boolean read FUpdatesPending;
|
714 |
property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
|
715 |
write SetUpdateRecordTypes;
|
716 |
property MasterDetailDelay: integer read GetMasterDetailDelay write SetMasterDetailDelay;
|
717 |
property DataSetCloseAction: TDataSetCloseAction
|
718 |
read FDataSetCloseAction write FDataSetCloseAction;
|
719 |
|
720 |
public
|
721 |
{Performance Statistics}
|
722 |
function GetRowsAffected(var SelectCount, InsertCount, UpdateCount, DeleteCount: integer): boolean;
|
723 |
function GetPerfStatistics(var stats: TPerfCounters): boolean;
|
724 |
property EnableStatistics: boolean read FEnableStatistics write FEnableStatistics;
|
725 |
|
726 |
published
|
727 |
property AllowAutoActivateTransaction: Boolean read FAllowAutoActivateTransaction
|
728 |
write FAllowAutoActivateTransaction;
|
729 |
property Database: TIBDatabase read GetDatabase write SetDatabase;
|
730 |
property Transaction: TIBTransaction read GetTransaction
|
731 |
write SetTransaction;
|
732 |
property ForcedRefresh: Boolean read FForcedRefresh
|
733 |
write FForcedRefresh default False;
|
734 |
property AutoCalcFields;
|
735 |
|
736 |
property AfterCancel;
|
737 |
property AfterClose;
|
738 |
property AfterDelete;
|
739 |
property AfterEdit;
|
740 |
property AfterInsert;
|
741 |
property AfterOpen;
|
742 |
property AfterPost;
|
743 |
property AfterRefresh;
|
744 |
property AfterScroll;
|
745 |
property BeforeCancel;
|
746 |
property BeforeClose;
|
747 |
property BeforeDelete;
|
748 |
property BeforeEdit;
|
749 |
property BeforeInsert;
|
750 |
property BeforeOpen;
|
751 |
property BeforePost;
|
752 |
property BeforeRefresh;
|
753 |
property BeforeScroll;
|
754 |
property OnCalcFields;
|
755 |
property OnDeleteError;
|
756 |
property OnEditError;
|
757 |
property OnNewRecord;
|
758 |
property OnPostError;
|
759 |
property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
|
760 |
write FOnUpdateError;
|
761 |
property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
|
762 |
write FOnUpdateRecord;
|
763 |
property OnDeleteReturning: TOnDeleteReturning read FOnDeleteReturning
|
764 |
write FOnDeleteReturning;
|
765 |
end;
|
766 |
|
767 |
TIBParserDataSet = class(TIBCustomDataSet)
|
768 |
public
|
769 |
property Parser;
|
770 |
end;
|
771 |
|
772 |
TIBDataSet = class(TIBParserDataSet)
|
773 |
private
|
774 |
function GetPrepared: Boolean;
|
775 |
|
776 |
protected
|
777 |
procedure SetFiltered(Value: Boolean); override;
|
778 |
procedure InternalOpen; override;
|
779 |
|
780 |
public
|
781 |
procedure Prepare;
|
782 |
procedure UnPrepare;
|
783 |
procedure BatchInput(InputObject: TIBBatchInput);
|
784 |
procedure BatchOutput(OutputObject: TIBBatchOutput);
|
785 |
procedure ExecSQL;
|
786 |
|
787 |
public
|
788 |
property Params;
|
789 |
property Prepared : Boolean read GetPrepared;
|
790 |
property QDelete;
|
791 |
property QInsert;
|
792 |
property QRefresh;
|
793 |
property QSelect;
|
794 |
property QModify;
|
795 |
property StatementType;
|
796 |
property SelectStmtHandle;
|
797 |
property BaseSQLSelect;
|
798 |
|
799 |
published
|
800 |
{ TIBCustomDataSet }
|
801 |
property AutoCommit;
|
802 |
property BufferChunks;
|
803 |
property CachedUpdates;
|
804 |
property EnableStatistics;
|
805 |
property DeleteSQL;
|
806 |
property InsertSQL;
|
807 |
property RefreshSQL;
|
808 |
property SelectSQL;
|
809 |
property ModifySQL;
|
810 |
property GeneratorField;
|
811 |
property GenerateParamNames;
|
812 |
property MasterDetailDelay;
|
813 |
property ParamCheck;
|
814 |
property UniDirectional;
|
815 |
property Filtered;
|
816 |
property DataSetCloseAction;
|
817 |
|
818 |
property BeforeDatabaseDisconnect;
|
819 |
property AfterDatabaseDisconnect;
|
820 |
property DatabaseFree;
|
821 |
property BeforeTransactionEnd;
|
822 |
property AfterTransactionEnd;
|
823 |
property TransactionFree;
|
824 |
|
825 |
{ TIBDataSet }
|
826 |
property Active;
|
827 |
property AutoCalcFields;
|
828 |
property DataSource read GetDataSource write SetDataSource;
|
829 |
|
830 |
property AfterCancel;
|
831 |
property AfterClose;
|
832 |
property AfterDelete;
|
833 |
property AfterEdit;
|
834 |
property AfterInsert;
|
835 |
property AfterOpen;
|
836 |
property AfterPost;
|
837 |
property AfterScroll;
|
838 |
property BeforeCancel;
|
839 |
property BeforeClose;
|
840 |
property BeforeDelete;
|
841 |
property BeforeEdit;
|
842 |
property BeforeInsert;
|
843 |
property BeforeOpen;
|
844 |
property BeforePost;
|
845 |
property BeforeScroll;
|
846 |
property OnCalcFields;
|
847 |
property OnDeleteError;
|
848 |
property OnEditError;
|
849 |
property OnFilterRecord;
|
850 |
property OnNewRecord;
|
851 |
property OnPostError;
|
852 |
property OnValidatePost;
|
853 |
property OnDeleteReturning;
|
854 |
end;
|
855 |
|
856 |
{ TIBDSBlobStream }
|
857 |
TIBDSBlobStream = class(TStream)
|
858 |
private
|
859 |
FHasWritten: boolean;
|
860 |
protected
|
861 |
FField: TField;
|
862 |
FBlobStream: TIBBlobStream;
|
863 |
function GetSize: Int64; override;
|
864 |
public
|
865 |
constructor Create(AField: TField; ABlobStream: TIBBlobStream;
|
866 |
Mode: TBlobStreamMode);
|
867 |
destructor Destroy; override;
|
868 |
function Read(var Buffer; Count: Longint): Longint; override;
|
869 |
function Seek(Offset: Longint; Origin: Word): Longint; override;
|
870 |
procedure SetSize(NewSize: Longint); override;
|
871 |
function Write(const Buffer; Count: Longint): Longint; override;
|
872 |
end;
|
873 |
|
874 |
{Extended Field Def for character set info}
|
875 |
|
876 |
{ TIBFieldDef }
|
877 |
|
878 |
TIBFieldDef = class(TFieldDef)
|
879 |
private
|
880 |
FArrayBounds: TArrayBounds;
|
881 |
FArrayDimensions: integer;
|
882 |
FCharacterSetName: RawByteString;
|
883 |
FCharacterSetSize: integer;
|
884 |
FCodePage: TSystemCodePage;
|
885 |
FIdentityColumn: boolean;
|
886 |
FRelationName: string;
|
887 |
FDataSize: integer;
|
888 |
published
|
889 |
property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
|
890 |
property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
|
891 |
property CodePage: TSystemCodePage read FCodePage write FCodePage;
|
892 |
property DataSize: integer read FDataSize write FDataSize;
|
893 |
property RelationName: string read FRelationName write FRelationName;
|
894 |
property ArrayDimensions: integer read FArrayDimensions write FArrayDimensions;
|
895 |
property ArrayBounds: TArrayBounds read FArrayBounds write FArrayBounds;
|
896 |
property IdentityColumn: boolean read FIdentityColumn write FIdentityColumn default false;
|
897 |
end;
|
898 |
|
899 |
const
|
900 |
DefaultFieldClasses: array[TFieldType] of TFieldClass = (
|
901 |
nil, { ftUnknown }
|
902 |
TIBStringField, { ftString }
|
903 |
TIBSmallintField, { ftSmallint }
|
904 |
TIBIntegerField, { ftInteger }
|
905 |
TWordField, { ftWord }
|
906 |
TBooleanField, { ftBoolean }
|
907 |
TFloatField, { ftFloat }
|
908 |
TCurrencyField, { ftCurrency }
|
909 |
TIBBCDField, { ftBCD }
|
910 |
TDateField, { ftDate }
|
911 |
TTimeField, { ftTime }
|
912 |
TDateTimeField, { ftDateTime }
|
913 |
TBytesField, { ftBytes }
|
914 |
TVarBytesField, { ftVarBytes }
|
915 |
TAutoIncField, { ftAutoInc }
|
916 |
TBlobField, { ftBlob }
|
917 |
TIBMemoField, { ftMemo }
|
918 |
TGraphicField, { ftGraphic }
|
919 |
TBlobField, { ftFmtMemo }
|
920 |
TBlobField, { ftParadoxOle }
|
921 |
TBlobField, { ftDBaseOle }
|
922 |
TBlobField, { ftTypedBinary }
|
923 |
nil, { ftCursor }
|
924 |
TStringField, { ftFixedChar }
|
925 |
nil, { ftWideString }
|
926 |
TIBLargeIntField, { ftLargeInt }
|
927 |
nil, { ftADT }
|
928 |
TIBArrayField, { ftArray }
|
929 |
nil, { ftReference }
|
930 |
nil, { ftDataSet }
|
931 |
TBlobField, { ftOraBlob }
|
932 |
TMemoField, { ftOraClob }
|
933 |
TVariantField, { ftVariant }
|
934 |
nil, { ftInterface }
|
935 |
nil, { ftIDispatch }
|
936 |
TGuidField, { ftGuid }
|
937 |
TDateTimeField, {ftTimestamp}
|
938 |
TIBBCDField, {ftFMTBcd}
|
939 |
nil, {ftFixedWideChar}
|
940 |
nil); {ftWideMemo}
|
941 |
(*
|
942 |
TADTField, { ftADT }
|
943 |
TArrayField, { ftArray }
|
944 |
TReferenceField, { ftReference }
|
945 |
TDataSetField, { ftDataSet }
|
946 |
TBlobField, { ftOraBlob }
|
947 |
TMemoField, { ftOraClob }
|
948 |
TVariantField, { ftVariant }
|
949 |
TInterfaceField, { ftInterface }
|
950 |
TIDispatchField, { ftIDispatch }
|
951 |
TGuidField); { ftGuid } *)
|
952 |
(*var
|
953 |
CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
|
954 |
|
955 |
implementation
|
956 |
|
957 |
uses Variants, FmtBCD, LazUTF8, FBMessages, IBQuery;
|
958 |
|
959 |
const FILE_BEGIN = 0;
|
960 |
FILE_CURRENT = 1;
|
961 |
FILE_END = 2;
|
962 |
|
963 |
type
|
964 |
|
965 |
TFieldNode = class(TObject)
|
966 |
protected
|
967 |
FieldName : String;
|
968 |
COMPUTED_BLR : Boolean;
|
969 |
DEFAULT_VALUE : boolean;
|
970 |
IDENTITY_COLUMN : boolean;
|
971 |
NextField : TFieldNode;
|
972 |
end;
|
973 |
|
974 |
TRelationNode = class(TObject)
|
975 |
protected
|
976 |
RelationName : String;
|
977 |
FieldNodes : TFieldNode;
|
978 |
NextRelation : TRelationNode;
|
979 |
end;
|
980 |
|
981 |
|
982 |
{ Copied from LCLProc in order to avoid LCL dependency
|
983 |
|
984 |
Ensures the covenient look of multiline string
|
985 |
when displaying it in the single line
|
986 |
* Replaces CR and LF with spaces
|
987 |
* Removes duplicate spaces
|
988 |
}
|
989 |
function TextToSingleLine(const AText: string): string;
|
990 |
var
|
991 |
str: string;
|
992 |
i, wstart, wlen: Integer;
|
993 |
begin
|
994 |
str := Trim(AText);
|
995 |
wstart := 0;
|
996 |
wlen := 0;
|
997 |
i := 1;
|
998 |
while i < Length(str) - 1 do
|
999 |
begin
|
1000 |
if (str[i] in [' ', #13, #10]) then
|
1001 |
begin
|
1002 |
if (wstart = 0) then
|
1003 |
begin
|
1004 |
wstart := i;
|
1005 |
wlen := 1;
|
1006 |
end else
|
1007 |
Inc(wlen);
|
1008 |
end else
|
1009 |
begin
|
1010 |
if wstart > 0 then
|
1011 |
begin
|
1012 |
str[wstart] := ' ';
|
1013 |
Delete(str, wstart+1, wlen-1);
|
1014 |
Dec(i, wlen-1);
|
1015 |
wstart := 0;
|
1016 |
end;
|
1017 |
end;
|
1018 |
Inc(i);
|
1019 |
end;
|
1020 |
Result := str;
|
1021 |
end;
|
1022 |
|
1023 |
{ TIBLargeIntField }
|
1024 |
|
1025 |
procedure TIBLargeIntField.Bind(Binding: Boolean);
|
1026 |
begin
|
1027 |
inherited Bind(Binding);
|
1028 |
if Binding and (FieldDef <> nil) then
|
1029 |
FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
|
1030 |
end;
|
1031 |
|
1032 |
{ TIBIntegerField }
|
1033 |
|
1034 |
procedure TIBIntegerField.Bind(Binding: Boolean);
|
1035 |
begin
|
1036 |
inherited Bind(Binding);
|
1037 |
if Binding and (FieldDef <> nil) then
|
1038 |
FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
|
1039 |
end;
|
1040 |
|
1041 |
{ TIBSmallintField }
|
1042 |
|
1043 |
procedure TIBSmallintField.Bind(Binding: Boolean);
|
1044 |
begin
|
1045 |
inherited Bind(Binding);
|
1046 |
if Binding and (FieldDef <> nil) then
|
1047 |
FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
|
1048 |
end;
|
1049 |
|
1050 |
{ TIBArray }
|
1051 |
|
1052 |
procedure TIBArray.EventHandler(Sender: IArray; Reason: TArrayEventReason);
|
1053 |
begin
|
1054 |
case Reason of
|
1055 |
arChanging:
|
1056 |
if FRecNo <> FField.Dataset.RecNo then
|
1057 |
IBError(ibxeNotCurrentArray,[nil]);
|
1058 |
|
1059 |
arChanged:
|
1060 |
FField.DataChanged;
|
1061 |
end;
|
1062 |
end;
|
1063 |
|
1064 |
constructor TIBArray.Create(aField: TIBArrayField; anArray: IArray);
|
1065 |
begin
|
1066 |
inherited Create;
|
1067 |
FField := aField;
|
1068 |
FArray := anArray;
|
1069 |
FRecNo := FField.Dataset.RecNo;
|
1070 |
FArray.AddEventHandler(EventHandler);
|
1071 |
end;
|
1072 |
|
1073 |
destructor TIBArray.Destroy;
|
1074 |
begin
|
1075 |
FArray.RemoveEventHandler(EventHandler);
|
1076 |
inherited Destroy;
|
1077 |
end;
|
1078 |
|
1079 |
{ TIBArrayField }
|
1080 |
|
1081 |
function TIBArrayField.GetArrayIntf: IArray;
|
1082 |
begin
|
1083 |
Result := TIBCustomDataSet(DataSet).GetArray(self);
|
1084 |
end;
|
1085 |
|
1086 |
function TIBArrayField.GetArrayID: TISC_QUAD;
|
1087 |
begin
|
1088 |
GetData(@Result);
|
1089 |
end;
|
1090 |
|
1091 |
procedure TIBArrayField.SetArrayIntf(AValue: IArray);
|
1092 |
begin
|
1093 |
TIBCustomDataSet(DataSet).SetArrayIntf(AValue,self);
|
1094 |
DataChanged;
|
1095 |
end;
|
1096 |
|
1097 |
class procedure TIBArrayField.CheckTypeSize(AValue: Longint);
|
1098 |
begin
|
1099 |
//Ignore
|
1100 |
end;
|
1101 |
|
1102 |
function TIBArrayField.GetAsString: string;
|
1103 |
begin
|
1104 |
Result := '(Array)';
|
1105 |
end;
|
1106 |
|
1107 |
function TIBArrayField.GetDataSize: Integer;
|
1108 |
begin
|
1109 |
Result := sizeof(TISC_QUAD);
|
1110 |
end;
|
1111 |
|
1112 |
procedure TIBArrayField.Bind(Binding: Boolean);
|
1113 |
begin
|
1114 |
inherited Bind(Binding);
|
1115 |
if Binding then
|
1116 |
begin
|
1117 |
FCacheOffset := TIBCustomDataSet(DataSet).ArrayFieldCount;
|
1118 |
Inc(TIBCustomDataSet(DataSet).FArrayFieldCount);
|
1119 |
if FieldDef <> nil then
|
1120 |
begin
|
1121 |
FRelationName := TIBFieldDef(FieldDef).FRelationName;
|
1122 |
FArrayDimensions := TIBFieldDef(FieldDef).ArrayDimensions;
|
1123 |
FArrayBounds := TIBFieldDef(FieldDef).ArrayBounds;
|
1124 |
end;
|
1125 |
end;
|
1126 |
end;
|
1127 |
|
1128 |
constructor TIBArrayField.Create(AOwner: TComponent);
|
1129 |
begin
|
1130 |
inherited Create(AOwner);
|
1131 |
SetDataType(ftArray);
|
1132 |
end;
|
1133 |
|
1134 |
function TIBArrayField.CreateArray: IArray;
|
1135 |
begin
|
1136 |
with DataSet as TIBCustomDataSet do
|
1137 |
Result := Database.Attachment.CreateArray(Transaction.TransactionIntf,FRelationName,FieldName);
|
1138 |
end;
|
1139 |
|
1140 |
{ TIBMemoField }
|
1141 |
|
1142 |
function TIBMemoField.GetTruncatedText: string;
|
1143 |
begin
|
1144 |
Result := GetAsString;
|
1145 |
|
1146 |
if Result <> '' then
|
1147 |
begin
|
1148 |
case CharacterSetSize of
|
1149 |
1:
|
1150 |
if DisplayWidth = 0 then
|
1151 |
Result := TextToSingleLine(Result)
|
1152 |
else
|
1153 |
if Length(Result) > DisplayWidth then {Show truncation with elipses}
|
1154 |
Result := TextToSingleLine(system.copy(Result,1,DisplayWidth-3)) + '...';
|
1155 |
|
1156 |
{2: case 2 ignored. This should be handled by TIBWideMemo}
|
1157 |
|
1158 |
3, {Assume UNICODE_FSS is really UTF8}
|
1159 |
4: {Include GB18030 - assuming UTF8 routines work for this codeset}
|
1160 |
if DisplayWidth = 0 then
|
1161 |
{$if not defined(ValidUTF8String)}
|
1162 |
Result := Utf8EscapeControlChars(TextToSingleLine(Result))
|
1163 |
{$else}
|
1164 |
Result := ValidUTF8String(TextToSingleLine(Result))
|
1165 |
{$endif}
|
1166 |
else
|
1167 |
if UTF8Length(Result) > DisplayWidth then {Show truncation with elipses}
|
1168 |
{$if not defined(ValidUTF8String)}
|
1169 |
Result := Utf8EscapeControlChars(TextToSingleLine(UTF8Copy(Result,1,DisplayWidth-3))) + '...';
|
1170 |
{$else}
|
1171 |
Result := ValidUTF8String(TextToSingleLine(UTF8Copy(Result,1,DisplayWidth-3))) + '...';
|
1172 |
{$endif}
|
1173 |
end;
|
1174 |
end
|
1175 |
end;
|
1176 |
|
1177 |
procedure TIBMemoField.Bind(Binding: Boolean);
|
1178 |
var IBFieldDef: TIBFieldDef;
|
1179 |
begin
|
1180 |
inherited Bind(Binding);
|
1181 |
if Binding and (FieldDef <> nil) then
|
1182 |
begin
|
1183 |
IBFieldDef := FieldDef as TIBFieldDef;
|
1184 |
CharacterSetSize := IBFieldDef.CharacterSetSize;
|
1185 |
CharacterSetName := IBFieldDef.CharacterSetName;
|
1186 |
CodePage := IBFieldDef.CodePage;
|
1187 |
end;
|
1188 |
end;
|
1189 |
|
1190 |
function TIBMemoField.GetAsString: string;
|
1191 |
var s: RawByteString;
|
1192 |
begin
|
1193 |
s := inherited GetAsString;
|
1194 |
SetCodePage(s,CodePage,false);
|
1195 |
if (CodePage <> CP_NONE) and (CodePage <> CP_UTF8) then
|
1196 |
SetCodePage(s,CP_UTF8,true); {LCL only accepts UTF8}
|
1197 |
Result := s;
|
1198 |
end;
|
1199 |
|
1200 |
function TIBMemoField.GetDefaultWidth: Longint;
|
1201 |
begin
|
1202 |
if DisplayTextAsClassName then
|
1203 |
Result := inherited
|
1204 |
else
|
1205 |
Result := 128;
|
1206 |
end;
|
1207 |
|
1208 |
procedure TIBMemoField.GetText(var AText: string; ADisplayText: Boolean);
|
1209 |
begin
|
1210 |
if ADisplayText then
|
1211 |
begin
|
1212 |
if not DisplayTextAsClassName and (CharacterSetName <> '') then
|
1213 |
AText := GetTruncatedText
|
1214 |
else
|
1215 |
inherited GetText(AText, ADisplayText);
|
1216 |
end
|
1217 |
else
|
1218 |
AText := GetAsString;
|
1219 |
end;
|
1220 |
|
1221 |
procedure TIBMemoField.SetAsString(const AValue: string);
|
1222 |
var s: RawByteString;
|
1223 |
begin
|
1224 |
s := AValue;
|
1225 |
if StringCodePage(s) <> CodePage then
|
1226 |
SetCodePage(s,CodePage,CodePage<>CP_NONE);
|
1227 |
inherited SetAsString(s);
|
1228 |
end;
|
1229 |
|
1230 |
constructor TIBMemoField.Create(AOwner: TComponent);
|
1231 |
begin
|
1232 |
inherited Create(AOwner);
|
1233 |
BlobType := ftMemo;
|
1234 |
FCodePage := CP_NONE;
|
1235 |
end;
|
1236 |
|
1237 |
{ TIBControlLink }
|
1238 |
|
1239 |
destructor TIBControlLink.Destroy;
|
1240 |
begin
|
1241 |
IBDataSet := nil;
|
1242 |
inherited Destroy;
|
1243 |
end;
|
1244 |
|
1245 |
procedure TIBControlLink.UpdateParams(Sender: TObject);
|
1246 |
begin
|
1247 |
|
1248 |
end;
|
1249 |
|
1250 |
procedure TIBControlLink.UpdateSQL(Sender: TObject);
|
1251 |
begin
|
1252 |
|
1253 |
end;
|
1254 |
|
1255 |
procedure TIBControlLink.SetIBDataSet(AValue: TIBCustomDataSet);
|
1256 |
begin
|
1257 |
if FTIBDataSet = AValue then Exit;
|
1258 |
if IBDataSet <> nil then
|
1259 |
IBDataSet.UnRegisterIBLink(self);
|
1260 |
FTIBDataSet := AValue;
|
1261 |
if IBDataSet <> nil then
|
1262 |
IBDataSet.RegisterIBLink(self);
|
1263 |
end;
|
1264 |
|
1265 |
|
1266 |
{ TIBStringField}
|
1267 |
|
1268 |
procedure TIBStringField.Bind(Binding: Boolean);
|
1269 |
var IBFieldDef: TIBFieldDef;
|
1270 |
begin
|
1271 |
inherited Bind(Binding);
|
1272 |
if Binding and (FieldDef <> nil) then
|
1273 |
begin
|
1274 |
IBFieldDef := FieldDef as TIBFieldDef;
|
1275 |
CharacterSetSize := IBFieldDef.CharacterSetSize;
|
1276 |
CharacterSetName := IBFieldDef.CharacterSetName;
|
1277 |
FDataSize := IBFieldDef.DataSize + 1;
|
1278 |
if AutoFieldSize then
|
1279 |
Size := IBFieldDef.Size;
|
1280 |
CodePage := IBFieldDef.CodePage;
|
1281 |
end;
|
1282 |
end;
|
1283 |
|
1284 |
function TIBStringField.GetDataSize: Integer;
|
1285 |
begin
|
1286 |
Result := FDataSize;
|
1287 |
end;
|
1288 |
|
1289 |
constructor TIBStringField.Create(aOwner: TComponent);
|
1290 |
begin
|
1291 |
inherited Create(aOwner);
|
1292 |
FCharacterSetSize := 1;
|
1293 |
FCodePage := CP_NONE;
|
1294 |
FAutoFieldSize := true;
|
1295 |
end;
|
1296 |
|
1297 |
class procedure TIBStringField.CheckTypeSize(Value: Integer);
|
1298 |
begin
|
1299 |
{ don't check string size. all sizes valid }
|
1300 |
end;
|
1301 |
|
1302 |
function TIBStringField.GetAsString: string;
|
1303 |
begin
|
1304 |
if not GetValue(Result) then Result := '';
|
1305 |
end;
|
1306 |
|
1307 |
function TIBStringField.GetAsVariant: Variant;
|
1308 |
var
|
1309 |
S: string;
|
1310 |
begin
|
1311 |
if GetValue(S) then Result := S else Result := Null;
|
1312 |
end;
|
1313 |
|
1314 |
function TIBStringField.GetValue(var Value: string): Boolean;
|
1315 |
var
|
1316 |
Buffer: PChar;
|
1317 |
s: RawByteString;
|
1318 |
begin
|
1319 |
Buffer := nil;
|
1320 |
IBAlloc(Buffer, 0, DataSize);
|
1321 |
try
|
1322 |
Result := GetData(Buffer);
|
1323 |
if Result then
|
1324 |
begin
|
1325 |
s := strpas(Buffer);
|
1326 |
SetCodePage(s,CodePage,false);
|
1327 |
if (CodePage <> CP_NONE) and (CodePage <> CP_UTF8) then
|
1328 |
SetCodePage(s,CP_UTF8,true); {LCL only accepts UTF8}
|
1329 |
Value := s;
|
1330 |
// writeln(FieldName,': ', StringCodePage(Value),', ',Value);
|
1331 |
if Transliterate and (Value <> '') then
|
1332 |
DataSet.Translate(PChar(Value), PChar(Value), False);
|
1333 |
end
|
1334 |
finally
|
1335 |
FreeMem(Buffer);
|
1336 |
end;
|
1337 |
end;
|
1338 |
|
1339 |
procedure TIBStringField.SetAsString(const Value: string);
|
1340 |
var
|
1341 |
Buffer: PChar;
|
1342 |
s: RawByteString;
|
1343 |
begin
|
1344 |
Buffer := nil;
|
1345 |
IBAlloc(Buffer, 0, DataSize);
|
1346 |
try
|
1347 |
s := Value;
|
1348 |
if StringCodePage(s) <> CodePage then
|
1349 |
SetCodePage(s,CodePage,CodePage<>CP_NONE);
|
1350 |
StrLCopy(Buffer, PChar(s), DataSize-1);
|
1351 |
if Transliterate then
|
1352 |
DataSet.Translate(Buffer, Buffer, True);
|
1353 |
SetData(Buffer);
|
1354 |
finally
|
1355 |
FreeMem(Buffer);
|
1356 |
end;
|
1357 |
end;
|
1358 |
|
1359 |
|
1360 |
{ TIBBCDField }
|
1361 |
|
1362 |
constructor TIBBCDField.Create(AOwner: TComponent);
|
1363 |
begin
|
1364 |
inherited Create(AOwner);
|
1365 |
SetDataType(ftBCD);
|
1366 |
Size := 8;
|
1367 |
end;
|
1368 |
|
1369 |
procedure TIBBCDField.Bind(Binding: Boolean);
|
1370 |
begin
|
1371 |
inherited Bind(Binding);
|
1372 |
if Binding and (FieldDef <> nil) then
|
1373 |
FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
|
1374 |
end;
|
1375 |
|
1376 |
class procedure TIBBCDField.CheckTypeSize(Value: Integer);
|
1377 |
begin
|
1378 |
{ No need to check as the base type is currency, not BCD }
|
1379 |
end;
|
1380 |
|
1381 |
function TIBBCDField.GetAsCurrency: Currency;
|
1382 |
begin
|
1383 |
if not GetValue(Result) then
|
1384 |
Result := 0;
|
1385 |
end;
|
1386 |
|
1387 |
function TIBBCDField.GetAsString: string;
|
1388 |
var
|
1389 |
C: System.Currency;
|
1390 |
begin
|
1391 |
if GetValue(C) then
|
1392 |
Result := CurrToStr(C)
|
1393 |
else
|
1394 |
Result := '';
|
1395 |
end;
|
1396 |
|
1397 |
function TIBBCDField.GetAsVariant: Variant;
|
1398 |
var
|
1399 |
C: System.Currency;
|
1400 |
begin
|
1401 |
if GetValue(C) then
|
1402 |
Result := C
|
1403 |
else
|
1404 |
Result := Null;
|
1405 |
end;
|
1406 |
|
1407 |
function TIBBCDField.GetDataSize: Integer;
|
1408 |
begin
|
1409 |
{$IFDEF TBCDFIELD_IS_BCD}
|
1410 |
Result := 8;
|
1411 |
{$ELSE}
|
1412 |
Result := inherited GetDataSize
|
1413 |
{$ENDIF}
|
1414 |
end;
|
1415 |
|
1416 |
{ TIBDataLink }
|
1417 |
|
1418 |
constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
|
1419 |
begin
|
1420 |
inherited Create;
|
1421 |
FDataSet := ADataSet;
|
1422 |
FTimer := TFPTimer.Create(nil);
|
1423 |
FTimer.Enabled := false;
|
1424 |
FTimer.Interval := 0;
|
1425 |
FTimer.OnTimer := HandleRefreshTimer;
|
1426 |
FDelayTimerValue := 0;
|
1427 |
end;
|
1428 |
|
1429 |
destructor TIBDataLink.Destroy;
|
1430 |
begin
|
1431 |
FDataSet.FDataLink := nil;
|
1432 |
if assigned(FTimer) then FTimer.Free;
|
1433 |
inherited Destroy;
|
1434 |
end;
|
1435 |
|
1436 |
procedure TIBDataLink.HandleRefreshTimer(Sender: TObject);
|
1437 |
begin
|
1438 |
FTimer.Enabled := false;
|
1439 |
if FDataSet.Active then
|
1440 |
FDataSet.RefreshParams;
|
1441 |
end;
|
1442 |
|
1443 |
procedure TIBDataLink.SetDelayTimerValue(AValue: integer);
|
1444 |
begin
|
1445 |
if FDelayTimerValue = AValue then Exit;
|
1446 |
FDelayTimerValue := AValue;
|
1447 |
{$IF FPC_FULLVERSION >= 30002}
|
1448 |
if (AValue > 0) and not IsMultiThread then
|
1449 |
IBError(ibxeMultiThreadRequired,['TIBQuery/TIBDataset MasterDetailDelay']);
|
1450 |
FTimer.Interval := FDelayTimerValue;
|
1451 |
{$IFEND}
|
1452 |
end;
|
1453 |
|
1454 |
procedure TIBDataLink.ActiveChanged;
|
1455 |
begin
|
1456 |
if FDataSet.Active then
|
1457 |
FDataSet.RefreshParams;
|
1458 |
end;
|
1459 |
|
1460 |
|
1461 |
function TIBDataLink.GetDetailDataSet: TDataSet;
|
1462 |
begin
|
1463 |
Result := FDataSet;
|
1464 |
end;
|
1465 |
|
1466 |
procedure TIBDataLink.RecordChanged(Field: TField);
|
1467 |
begin
|
1468 |
if (Field = nil) and FDataSet.Active then
|
1469 |
begin
|
1470 |
{$IF FPC_FULLVERSION >= 30002}
|
1471 |
if FDelayTimerValue > 0 then
|
1472 |
with FTimer do
|
1473 |
begin
|
1474 |
CheckSynchronize; {Ensure not waiting on Synchronize}
|
1475 |
if Enabled then
|
1476 |
begin
|
1477 |
StopTimer;
|
1478 |
StartTimer;
|
1479 |
end
|
1480 |
else
|
1481 |
Enabled := true;
|
1482 |
end
|
1483 |
else
|
1484 |
{$IFEND}
|
1485 |
FDataSet.RefreshParams;
|
1486 |
end;
|
1487 |
end;
|
1488 |
|
1489 |
procedure TIBDataLink.CheckBrowseMode;
|
1490 |
begin
|
1491 |
if FDataSet.Active then
|
1492 |
FDataSet.CheckBrowseMode;
|
1493 |
end;
|
1494 |
|
1495 |
{ TIBCustomDataSet }
|
1496 |
|
1497 |
constructor TIBCustomDataSet.Create(AOwner: TComponent);
|
1498 |
begin
|
1499 |
inherited Create(AOwner);
|
1500 |
FBase := TIBBase.Create(Self);
|
1501 |
FDatabaseInfo := TIBDatabaseInfo.Create(self);
|
1502 |
FIBLinks := TList.Create;
|
1503 |
FCurrentRecord := -1;
|
1504 |
FDeletedRecords := 0;
|
1505 |
FUniDirectional := False;
|
1506 |
FBufferChunks := BufferCacheSize;
|
1507 |
FBlobStreamList := TList.Create;
|
1508 |
FArrayList := TList.Create;
|
1509 |
FGeneratorField := TIBGenerator.Create(self);
|
1510 |
FDataLink := TIBDataLink.Create(Self);
|
1511 |
FQDelete := TIBSQL.Create(Self);
|
1512 |
FQDelete.OnSQLChanging := SQLChanging;
|
1513 |
FQDelete.GoToFirstRecordOnExecute := False;
|
1514 |
FQInsert := TIBSQL.Create(Self);
|
1515 |
FQInsert.OnSQLChanging := SQLChanging;
|
1516 |
FQInsert.GoToFirstRecordOnExecute := False;
|
1517 |
FQRefresh := TIBSQL.Create(Self);
|
1518 |
FQRefresh.OnSQLChanging := SQLChanging;
|
1519 |
FQRefresh.GoToFirstRecordOnExecute := False;
|
1520 |
FQSelect := TIBSQL.Create(Self);
|
1521 |
FQSelect.OnSQLChanging := SQLChanging;
|
1522 |
FQSelect.OnSQLChanged := SQLChanged;
|
1523 |
FQSelect.GoToFirstRecordOnExecute := False;
|
1524 |
FQModify := TIBSQL.Create(Self);
|
1525 |
FQModify.OnSQLChanging := SQLChanging;
|
1526 |
FQModify.GoToFirstRecordOnExecute := False;
|
1527 |
FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
|
1528 |
FParamCheck := True;
|
1529 |
FGenerateParamNames := False;
|
1530 |
FForcedRefresh := False;
|
1531 |
FAutoCommit:= acDisabled;
|
1532 |
FDataSetCloseAction := dcDiscardChanges;
|
1533 |
{Bookmark Size is Integer for IBX}
|
1534 |
BookmarkSize := SizeOf(Integer);
|
1535 |
FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
|
1536 |
FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
|
1537 |
FBase.OnDatabaseFree := DoDatabaseFree;
|
1538 |
FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
|
1539 |
FBase.AfterTransactionEnd := DoAfterTransactionEnd;
|
1540 |
FBase.OnTransactionFree := DoTransactionFree;
|
1541 |
if AOwner is TIBDatabase then
|
1542 |
Database := TIBDatabase(AOwner)
|
1543 |
else
|
1544 |
if AOwner is TIBTransaction then
|
1545 |
Transaction := TIBTransaction(AOwner);
|
1546 |
FBaseSQLSelect := TStringList.Create;
|
1547 |
end;
|
1548 |
|
1549 |
destructor TIBCustomDataSet.Destroy;
|
1550 |
begin
|
1551 |
if Active then Active := false;
|
1552 |
if assigned(FGeneratorField) then FGeneratorField.Free;
|
1553 |
FDataLink.Free;
|
1554 |
FBase.Free;
|
1555 |
ClearBlobCache;
|
1556 |
ClearIBLinks;
|
1557 |
FIBLinks.Free;
|
1558 |
FBlobStreamList.Free;
|
1559 |
FArrayList.Free;
|
1560 |
FreeMem(FBufferCache);
|
1561 |
FBufferCache := nil;
|
1562 |
FreeMem(FOldBufferCache);
|
1563 |
FOldBufferCache := nil;
|
1564 |
FCacheSize := 0;
|
1565 |
FOldCacheSize := 0;
|
1566 |
FMappedFieldPosition := nil;
|
1567 |
if assigned(FBaseSQLSelect) then FBaseSQLSelect.Free;
|
1568 |
if assigned(FParser) then FParser.Free;
|
1569 |
inherited Destroy;
|
1570 |
end;
|
1571 |
|
1572 |
function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
|
1573 |
TGetResult;
|
1574 |
begin
|
1575 |
while not IsVisible(Buffer) do
|
1576 |
begin
|
1577 |
if GetMode = gmPrior then
|
1578 |
begin
|
1579 |
Dec(FCurrentRecord);
|
1580 |
if FCurrentRecord = -1 then
|
1581 |
begin
|
1582 |
result := grBOF;
|
1583 |
exit;
|
1584 |
end;
|
1585 |
ReadRecordCache(FCurrentRecord, Buffer, False);
|
1586 |
end
|
1587 |
else begin
|
1588 |
Inc(FCurrentRecord);
|
1589 |
if (FCurrentRecord = FRecordCount) then
|
1590 |
begin
|
1591 |
if (not FQSelect.EOF) and FQSelect.Next then
|
1592 |
begin
|
1593 |
FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
|
1594 |
Inc(FRecordCount);
|
1595 |
end
|
1596 |
else begin
|
1597 |
result := grEOF;
|
1598 |
exit;
|
1599 |
end;
|
1600 |
end
|
1601 |
else
|
1602 |
ReadRecordCache(FCurrentRecord, Buffer, False);
|
1603 |
end;
|
1604 |
end;
|
1605 |
result := grOK;
|
1606 |
end;
|
1607 |
|
1608 |
procedure TIBCustomDataSet.ApplyUpdates;
|
1609 |
var
|
1610 |
CurBookmark: TBookmark;
|
1611 |
Buffer: PRecordData;
|
1612 |
CurUpdateTypes: TIBUpdateRecordTypes;
|
1613 |
UpdateAction: TIBUpdateAction;
|
1614 |
UpdateKind: TUpdateKind;
|
1615 |
bRecordsSkipped: Boolean;
|
1616 |
|
1617 |
procedure GetUpdateKind;
|
1618 |
begin
|
1619 |
case Buffer^.rdCachedUpdateStatus of
|
1620 |
cusModified:
|
1621 |
UpdateKind := ukModify;
|
1622 |
cusInserted:
|
1623 |
UpdateKind := ukInsert;
|
1624 |
else
|
1625 |
UpdateKind := ukDelete;
|
1626 |
end;
|
1627 |
end;
|
1628 |
|
1629 |
procedure ResetBufferUpdateStatus;
|
1630 |
begin
|
1631 |
case Buffer^.rdCachedUpdateStatus of
|
1632 |
cusModified:
|
1633 |
begin
|
1634 |
PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
|
1635 |
PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
|
1636 |
end;
|
1637 |
cusInserted:
|
1638 |
begin
|
1639 |
PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
|
1640 |
PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
|
1641 |
end;
|
1642 |
cusDeleted:
|
1643 |
begin
|
1644 |
PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
|
1645 |
PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
|
1646 |
end;
|
1647 |
end;
|
1648 |
WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
|
1649 |
end;
|
1650 |
|
1651 |
procedure UpdateUsingOnUpdateRecord;
|
1652 |
begin
|
1653 |
UpdateAction := uaFail;
|
1654 |
try
|
1655 |
FOnUpdateRecord(Self, UpdateKind, UpdateAction);
|
1656 |
except
|
1657 |
on E: Exception do
|
1658 |
begin
|
1659 |
if (E is EDatabaseError) and Assigned(FOnUpdateError) then
|
1660 |
FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
|
1661 |
if UpdateAction = uaFail then
|
1662 |
raise;
|
1663 |
end;
|
1664 |
end;
|
1665 |
end;
|
1666 |
|
1667 |
procedure UpdateUsingUpdateObject;
|
1668 |
begin
|
1669 |
try
|
1670 |
FUpdateObject.Apply(UpdateKind,PChar(Buffer));
|
1671 |
ResetBufferUpdateStatus;
|
1672 |
except
|
1673 |
on E: Exception do
|
1674 |
if (E is EDatabaseError) and Assigned(FOnUpdateError) then
|
1675 |
FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
|
1676 |
end;
|
1677 |
end;
|
1678 |
|
1679 |
procedure UpdateUsingInternalquery;
|
1680 |
begin
|
1681 |
try
|
1682 |
case Buffer^.rdCachedUpdateStatus of
|
1683 |
cusModified:
|
1684 |
InternalPostRecord(FQModify, Buffer);
|
1685 |
cusInserted:
|
1686 |
InternalPostRecord(FQInsert, Buffer);
|
1687 |
cusDeleted:
|
1688 |
InternalDeleteRecord(FQDelete, Buffer);
|
1689 |
end;
|
1690 |
except
|
1691 |
on E: EIBError do begin
|
1692 |
UpdateAction := uaFail;
|
1693 |
if Assigned(FOnUpdateError) then
|
1694 |
FOnUpdateError(Self, E, UpdateKind, UpdateAction);
|
1695 |
case UpdateAction of
|
1696 |
uaFail: raise;
|
1697 |
uaAbort: SysUtils.Abort;
|
1698 |
uaSkip: bRecordsSkipped := True;
|
1699 |
end;
|
1700 |
end;
|
1701 |
end;
|
1702 |
end;
|
1703 |
|
1704 |
begin
|
1705 |
if State in [dsEdit, dsInsert] then
|
1706 |
Post;
|
1707 |
FBase.CheckDatabase;
|
1708 |
FBase.CheckTransaction;
|
1709 |
DisableControls;
|
1710 |
CurBookmark := Bookmark;
|
1711 |
CurUpdateTypes := FUpdateRecordTypes;
|
1712 |
FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
|
1713 |
try
|
1714 |
First;
|
1715 |
bRecordsSkipped := False;
|
1716 |
while not EOF do
|
1717 |
begin
|
1718 |
Buffer := PRecordData(GetActiveBuf);
|
1719 |
GetUpdateKind;
|
1720 |
UpdateAction := uaApply;
|
1721 |
if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
|
1722 |
begin
|
1723 |
if (Assigned(FOnUpdateRecord)) then
|
1724 |
UpdateUsingOnUpdateRecord
|
1725 |
else
|
1726 |
if Assigned(FUpdateObject) then
|
1727 |
UpdateUsingUpdateObject;
|
1728 |
case UpdateAction of
|
1729 |
uaFail:
|
1730 |
IBError(ibxeUserAbort, [nil]);
|
1731 |
uaAbort:
|
1732 |
SysUtils.Abort;
|
1733 |
uaApplied:
|
1734 |
ResetBufferUpdateStatus;
|
1735 |
uaSkip:
|
1736 |
bRecordsSkipped := True;
|
1737 |
uaRetry:
|
1738 |
Continue;
|
1739 |
end;
|
1740 |
end;
|
1741 |
if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
|
1742 |
begin
|
1743 |
UpdateUsingInternalquery;
|
1744 |
UpdateAction := uaApplied;
|
1745 |
end;
|
1746 |
Next;
|
1747 |
end;
|
1748 |
FUpdatesPending := bRecordsSkipped;
|
1749 |
finally
|
1750 |
FUpdateRecordTypes := CurUpdateTypes;
|
1751 |
Bookmark := CurBookmark;
|
1752 |
EnableControls;
|
1753 |
end;
|
1754 |
end;
|
1755 |
|
1756 |
procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
|
1757 |
begin
|
1758 |
FQSelect.BatchInput(InputObject);
|
1759 |
end;
|
1760 |
|
1761 |
procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
|
1762 |
var
|
1763 |
Qry: TIBSQL;
|
1764 |
begin
|
1765 |
Qry := TIBSQL.Create(Self);
|
1766 |
try
|
1767 |
Qry.Database := FBase.Database;
|
1768 |
Qry.Transaction := FBase.Transaction;
|
1769 |
Qry.SQL.Assign(FQSelect.SQL);
|
1770 |
Qry.BatchOutput(OutputObject);
|
1771 |
finally
|
1772 |
Qry.Free;
|
1773 |
end;
|
1774 |
end;
|
1775 |
|
1776 |
procedure TIBCustomDataSet.CancelUpdates;
|
1777 |
var
|
1778 |
CurUpdateTypes: TIBUpdateRecordTypes;
|
1779 |
begin
|
1780 |
if State in [dsEdit, dsInsert] then
|
1781 |
Post;
|
1782 |
if FCachedUpdates and FUpdatesPending then
|
1783 |
begin
|
1784 |
DisableControls;
|
1785 |
CurUpdateTypes := UpdateRecordTypes;
|
1786 |
UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
|
1787 |
try
|
1788 |
First;
|
1789 |
while not EOF do
|
1790 |
begin
|
1791 |
if UpdateStatus = usInserted then
|
1792 |
RevertRecord
|
1793 |
else
|
1794 |
begin
|
1795 |
RevertRecord;
|
1796 |
Next;
|
1797 |
end;
|
1798 |
end;
|
1799 |
finally
|
1800 |
UpdateRecordTypes := CurUpdateTypes;
|
1801 |
First;
|
1802 |
FUpdatesPending := False;
|
1803 |
EnableControls;
|
1804 |
end;
|
1805 |
end;
|
1806 |
end;
|
1807 |
|
1808 |
function TIBCustomDataSet.GetFieldPosition(AliasName: string): integer;
|
1809 |
var i: integer;
|
1810 |
Prepared: boolean;
|
1811 |
begin
|
1812 |
Result := 0;
|
1813 |
Prepared := FInternalPrepared;
|
1814 |
if not Prepared then
|
1815 |
InternalPrepare;
|
1816 |
try
|
1817 |
for i := 0 to Length(FAliasNameList) - 1 do
|
1818 |
if FAliasNameList[i] = AliasName then
|
1819 |
begin
|
1820 |
Result := i + 1;
|
1821 |
Exit
|
1822 |
end;
|
1823 |
finally
|
1824 |
if not Prepared then
|
1825 |
InternalUnPrepare;
|
1826 |
end;
|
1827 |
end;
|
1828 |
|
1829 |
procedure TIBCustomDataSet.ActivateConnection;
|
1830 |
begin
|
1831 |
if not Assigned(Database) then
|
1832 |
IBError(ibxeDatabaseNotAssigned, [nil]);
|
1833 |
if not Assigned(Transaction) then
|
1834 |
IBError(ibxeTransactionNotAssigned, [nil]);
|
1835 |
if not Database.Connected then Database.Open;
|
1836 |
end;
|
1837 |
|
1838 |
function TIBCustomDataSet.ActivateTransaction: Boolean;
|
1839 |
begin
|
1840 |
Result := False;
|
1841 |
if AllowAutoActivateTransaction or (csDesigning in ComponentState) then
|
1842 |
begin
|
1843 |
if not Assigned(Transaction) then
|
1844 |
IBError(ibxeTransactionNotAssigned, [nil]);
|
1845 |
if not Transaction.Active then
|
1846 |
begin
|
1847 |
Result := True;
|
1848 |
Transaction.StartTransaction;
|
1849 |
FDidActivate := True;
|
1850 |
end;
|
1851 |
end;
|
1852 |
end;
|
1853 |
|
1854 |
procedure TIBCustomDataSet.DeactivateTransaction;
|
1855 |
var
|
1856 |
i: Integer;
|
1857 |
begin
|
1858 |
if not Assigned(Transaction) then
|
1859 |
IBError(ibxeTransactionNotAssigned, [nil]);
|
1860 |
with Transaction do
|
1861 |
begin
|
1862 |
for i := 0 to SQLObjectCount - 1 do
|
1863 |
begin
|
1864 |
if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
|
1865 |
begin
|
1866 |
if TDataSet(SQLObjects[i].owner).Active then
|
1867 |
begin
|
1868 |
FDidActivate := False;
|
1869 |
exit;
|
1870 |
end;
|
1871 |
end;
|
1872 |
end;
|
1873 |
end;
|
1874 |
FInternalPrepared := False;
|
1875 |
if Transaction.InTransaction then
|
1876 |
Transaction.Commit;
|
1877 |
FDidActivate := False;
|
1878 |
end;
|
1879 |
|
1880 |
procedure TIBCustomDataSet.CheckDatasetClosed;
|
1881 |
begin
|
1882 |
if FOpen then
|
1883 |
IBError(ibxeDatasetOpen, [nil]);
|
1884 |
end;
|
1885 |
|
1886 |
procedure TIBCustomDataSet.CheckDatasetOpen;
|
1887 |
begin
|
1888 |
if not FOpen then
|
1889 |
IBError(ibxeDatasetClosed, [nil]);
|
1890 |
end;
|
1891 |
|
1892 |
function TIBCustomDataSet.CreateParser: TSelectSQLParser;
|
1893 |
begin
|
1894 |
Result := TSelectSQLParser.Create(self,FBaseSQLSelect);
|
1895 |
Result.OnSQLChanging := SQLChanging
|
1896 |
end;
|
1897 |
|
1898 |
procedure TIBCustomDataSet.CheckNotUniDirectional;
|
1899 |
begin
|
1900 |
if UniDirectional then
|
1901 |
IBError(ibxeDataSetUniDirectional, [nil]);
|
1902 |
end;
|
1903 |
|
1904 |
procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
|
1905 |
begin
|
1906 |
with PRecordData(Buffer)^ do
|
1907 |
if (State = dsInsert) and (not Modified) then
|
1908 |
begin
|
1909 |
rdRecordNumber := FRecordCount;
|
1910 |
FCurrentRecord := FRecordCount;
|
1911 |
end;
|
1912 |
end;
|
1913 |
|
1914 |
function TIBCustomDataSet.CanEdit: Boolean;
|
1915 |
var
|
1916 |
Buff: PRecordData;
|
1917 |
begin
|
1918 |
Buff := PRecordData(GetActiveBuf);
|
1919 |
result := (FQModify.SQL.Text <> '') or
|
1920 |
(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
|
1921 |
((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
|
1922 |
(FCachedUpdates));
|
1923 |
end;
|
1924 |
|
1925 |
function TIBCustomDataSet.CanInsert: Boolean;
|
1926 |
begin
|
1927 |
result := (FQInsert.SQL.Text <> '') or
|
1928 |
(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
|
1929 |
end;
|
1930 |
|
1931 |
function TIBCustomDataSet.CanDelete: Boolean;
|
1932 |
begin
|
1933 |
if (FQDelete.SQL.Text <> '') or
|
1934 |
(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
|
1935 |
result := True
|
1936 |
else
|
1937 |
result := False;
|
1938 |
end;
|
1939 |
|
1940 |
function TIBCustomDataSet.CanRefresh: Boolean;
|
1941 |
begin
|
1942 |
result := (FQRefresh.SQL.Text <> '') or
|
1943 |
(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
|
1944 |
end;
|
1945 |
|
1946 |
procedure TIBCustomDataSet.CheckEditState;
|
1947 |
begin
|
1948 |
case State of
|
1949 |
{ Check all the wsEditMode types }
|
1950 |
dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
|
1951 |
dsNewValue, dsInternalCalc :
|
1952 |
begin
|
1953 |
if (State in [dsEdit]) and (not CanEdit) then
|
1954 |
IBError(ibxeCannotUpdate, [nil]);
|
1955 |
if (State in [dsInsert]) and (not CanInsert) then
|
1956 |
IBError(ibxeCannotInsert, [nil]);
|
1957 |
end;
|
1958 |
else
|
1959 |
IBError(ibxeNotEditing, [])
|
1960 |
end;
|
1961 |
end;
|
1962 |
|
1963 |
procedure TIBCustomDataSet.ClearBlobCache;
|
1964 |
var
|
1965 |
i: Integer;
|
1966 |
begin
|
1967 |
for i := 0 to FBlobStreamList.Count - 1 do
|
1968 |
begin
|
1969 |
TIBBlobStream(FBlobStreamList[i]).Free;
|
1970 |
FBlobStreamList[i] := nil;
|
1971 |
end;
|
1972 |
FBlobStreamList.Pack;
|
1973 |
end;
|
1974 |
|
1975 |
procedure TIBCustomDataSet.ClearArrayCache;
|
1976 |
var
|
1977 |
i: Integer;
|
1978 |
begin
|
1979 |
for i := 0 to FArrayList.Count - 1 do
|
1980 |
begin
|
1981 |
TIBArray(FArrayList[i]).Free;
|
1982 |
FArrayList[i] := nil;
|
1983 |
end;
|
1984 |
FArrayList.Pack;
|
1985 |
end;
|
1986 |
|
1987 |
procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
|
1988 |
begin
|
1989 |
Move(Source^, Dest^, FRecordBufferSize);
|
1990 |
end;
|
1991 |
|
1992 |
procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
|
1993 |
begin
|
1994 |
if Active then
|
1995 |
Active := False;
|
1996 |
InternalUnPrepare;
|
1997 |
if Assigned(FBeforeDatabaseDisconnect) then
|
1998 |
FBeforeDatabaseDisconnect(Sender);
|
1999 |
end;
|
2000 |
|
2001 |
procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
|
2002 |
begin
|
2003 |
if Assigned(FAfterDatabaseDisconnect) then
|
2004 |
FAfterDatabaseDisconnect(Sender);
|
2005 |
end;
|
2006 |
|
2007 |
procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
|
2008 |
begin
|
2009 |
if Assigned(FDatabaseFree) then
|
2010 |
FDatabaseFree(Sender);
|
2011 |
end;
|
2012 |
|
2013 |
procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject;
|
2014 |
Action: TTransactionAction);
|
2015 |
begin
|
2016 |
FCloseAction := Action;
|
2017 |
FInTransactionEnd := true;
|
2018 |
try
|
2019 |
if Active then
|
2020 |
Active := False;
|
2021 |
finally
|
2022 |
FInTransactionEnd := false;
|
2023 |
end;
|
2024 |
if FQSelect <> nil then
|
2025 |
FQSelect.FreeHandle;
|
2026 |
if FQDelete <> nil then
|
2027 |
FQDelete.FreeHandle;
|
2028 |
if FQInsert <> nil then
|
2029 |
FQInsert.FreeHandle;
|
2030 |
if FQModify <> nil then
|
2031 |
FQModify.FreeHandle;
|
2032 |
if FQRefresh <> nil then
|
2033 |
FQRefresh.FreeHandle;
|
2034 |
InternalUnPrepare;
|
2035 |
if Assigned(FBeforeTransactionEnd) then
|
2036 |
FBeforeTransactionEnd(Sender);
|
2037 |
end;
|
2038 |
|
2039 |
procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
|
2040 |
begin
|
2041 |
if Assigned(FAfterTransactionEnd) then
|
2042 |
FAfterTransactionEnd(Sender);
|
2043 |
end;
|
2044 |
|
2045 |
procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
|
2046 |
begin
|
2047 |
if Assigned(FTransactionFree) then
|
2048 |
FTransactionFree(Sender);
|
2049 |
end;
|
2050 |
|
2051 |
procedure TIBCustomDataSet.DoDeleteReturning(QryResults: IResults);
|
2052 |
begin
|
2053 |
if assigned(FOnDeleteReturning) then
|
2054 |
OnDeleteReturning(self,QryResults);
|
2055 |
end;
|
2056 |
|
2057 |
procedure TIBCustomDataSet.InitModelBuffer(Qry: TIBSQL; Buffer: PChar);
|
2058 |
var i, j: Integer;
|
2059 |
FieldsLoaded: integer;
|
2060 |
p: PRecordData;
|
2061 |
colMetadata: IColumnMetaData;
|
2062 |
begin
|
2063 |
p := PRecordData(Buffer);
|
2064 |
{ Get record information }
|
2065 |
p^.rdBookmarkFlag := bfCurrent;
|
2066 |
p^.rdFieldCount := Qry.FieldCount;
|
2067 |
p^.rdRecordNumber := -1;
|
2068 |
p^.rdUpdateStatus := usUnmodified;
|
2069 |
p^.rdCachedUpdateStatus := cusUnmodified;
|
2070 |
p^.rdSavedOffset := $FFFFFFFF;
|
2071 |
|
2072 |
{ Load up the fields }
|
2073 |
FieldsLoaded := FQSelect.MetaData.Count;
|
2074 |
j := 1;
|
2075 |
for i := 0 to Qry.MetaData.Count - 1 do
|
2076 |
begin
|
2077 |
if (Qry = FQSelect) then
|
2078 |
j := i + 1
|
2079 |
else
|
2080 |
begin
|
2081 |
if FieldsLoaded = 0 then
|
2082 |
break;
|
2083 |
j := FQSelect.FieldIndex[Qry[i].Name] + 1;
|
2084 |
if j < 1 then
|
2085 |
continue
|
2086 |
else
|
2087 |
Dec(FieldsLoaded);
|
2088 |
end;
|
2089 |
if j > 0 then
|
2090 |
begin
|
2091 |
colMetadata := Qry.MetaData[i];
|
2092 |
with p^.rdFields[j], FFieldColumns^[j] do
|
2093 |
begin
|
2094 |
fdDataType := colMetadata.GetSQLType;
|
2095 |
if fdDataType = SQL_BLOB then
|
2096 |
fdDataScale := 0
|
2097 |
else
|
2098 |
fdDataScale := colMetadata.getScale;
|
2099 |
fdNullable := colMetadata.getIsNullable;
|
2100 |
fdIsNull := true;
|
2101 |
fdDataSize := colMetadata.GetSize;
|
2102 |
fdDataLength := 0;
|
2103 |
fdCodePage := CP_NONE;
|
2104 |
|
2105 |
case fdDataType of
|
2106 |
SQL_TIMESTAMP,
|
2107 |
SQL_TYPE_DATE,
|
2108 |
SQL_TYPE_TIME:
|
2109 |
fdDataSize := SizeOf(TDateTime);
|
2110 |
SQL_SHORT, SQL_LONG:
|
2111 |
begin
|
2112 |
if (fdDataScale = 0) then
|
2113 |
fdDataSize := SizeOf(Integer)
|
2114 |
else
|
2115 |
if (fdDataScale >= (-4)) then
|
2116 |
fdDataSize := SizeOf(Currency)
|
2117 |
else
|
2118 |
fdDataSize := SizeOf(Double);
|
2119 |
end;
|
2120 |
SQL_INT64:
|
2121 |
begin
|
2122 |
if (fdDataScale = 0) then
|
2123 |
fdDataSize := SizeOf(Int64)
|
2124 |
else
|
2125 |
if (fdDataScale >= (-4)) then
|
2126 |
fdDataSize := SizeOf(Currency)
|
2127 |
else
|
2128 |
fdDataSize := SizeOf(Double);
|
2129 |
end;
|
2130 |
SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
|
2131 |
fdDataSize := SizeOf(Double);
|
2132 |
SQL_BOOLEAN:
|
2133 |
fdDataSize := SizeOf(wordBool);
|
2134 |
SQL_VARYING,
|
2135 |
SQL_TEXT,
|
2136 |
SQL_BLOB:
|
2137 |
fdCodePage := Qry.Metadata[i].getCodePage;
|
2138 |
end;
|
2139 |
fdDataOfs := FRecordSize;
|
2140 |
Inc(FRecordSize, fdDataSize);
|
2141 |
end;
|
2142 |
end;
|
2143 |
end;
|
2144 |
end;
|
2145 |
|
2146 |
{Update Buffer Fields from Query Results}
|
2147 |
|
2148 |
procedure TIBCustomDataSet.UpdateRecordFromQuery(QryResults: IResults;
|
2149 |
Buffer: PChar);
|
2150 |
var i, j: integer;
|
2151 |
begin
|
2152 |
for i := 0 to QryResults.Count - 1 do
|
2153 |
begin
|
2154 |
j := GetFieldPosition(QryResults[i].GetAliasName);
|
2155 |
if j > 0 then
|
2156 |
begin
|
2157 |
ColumnDataToBuffer(QryResults,i,j,Buffer);
|
2158 |
FBufferUpdatedOnQryReturn := true;
|
2159 |
end;
|
2160 |
end;
|
2161 |
end;
|
2162 |
|
2163 |
|
2164 |
{Move column data returned from query to row buffer}
|
2165 |
|
2166 |
procedure TIBCustomDataSet.ColumnDataToBuffer(QryResults: IResults;
|
2167 |
ColumnIndex, FieldIndex: integer; Buffer: PChar);
|
2168 |
var
|
2169 |
LocalData: PByte;
|
2170 |
LocalDate: TDateTime;
|
2171 |
LocalDouble: Double;
|
2172 |
LocalInt: Integer;
|
2173 |
LocalBool: wordBool;
|
2174 |
LocalInt64: Int64;
|
2175 |
LocalCurrency: Currency;
|
2176 |
ColData: ISQLData;
|
2177 |
begin
|
2178 |
LocalData := nil;
|
2179 |
with PRecordData(Buffer)^.rdFields[FieldIndex], FFieldColumns^[FieldIndex] do
|
2180 |
begin
|
2181 |
QryResults.GetData(ColumnIndex,fdIsNull,fdDataLength,LocalData);
|
2182 |
if not fdIsNull then
|
2183 |
begin
|
2184 |
ColData := QryResults[ColumnIndex];
|
2185 |
case fdDataType of {Get Formatted data for column types that need formatting}
|
2186 |
SQL_TYPE_DATE,
|
2187 |
SQL_TYPE_TIME,
|
2188 |
SQL_TIMESTAMP:
|
2189 |
begin
|
2190 |
{This is an IBX native format and not the TDataset approach. See also GetFieldData}
|
2191 |
LocalDate := ColData.AsDateTime;
|
2192 |
LocalData := PByte(@LocalDate);
|
2193 |
end;
|
2194 |
SQL_SHORT, SQL_LONG:
|
2195 |
begin
|
2196 |
if (fdDataScale = 0) then
|
2197 |
begin
|
2198 |
LocalInt := ColData.AsLong;
|
2199 |
LocalData := PByte(@LocalInt);
|
2200 |
end
|
2201 |
else
|
2202 |
if (fdDataScale >= (-4)) then
|
2203 |
begin
|
2204 |
LocalCurrency := ColData.AsCurrency;
|
2205 |
LocalData := PByte(@LocalCurrency);
|
2206 |
end
|
2207 |
else
|
2208 |
begin
|
2209 |
LocalDouble := ColData.AsDouble;
|
2210 |
LocalData := PByte(@LocalDouble);
|
2211 |
end;
|
2212 |
end;
|
2213 |
SQL_INT64:
|
2214 |
begin
|
2215 |
if (fdDataScale = 0) then
|
2216 |
begin
|
2217 |
LocalInt64 := ColData.AsInt64;
|
2218 |
LocalData := PByte(@LocalInt64);
|
2219 |
end
|
2220 |
else
|
2221 |
if (fdDataScale >= (-4)) then
|
2222 |
begin
|
2223 |
LocalCurrency := ColData.AsCurrency;
|
2224 |
LocalData := PByte(@LocalCurrency);
|
2225 |
end
|
2226 |
else
|
2227 |
begin
|
2228 |
LocalDouble := ColData.AsDouble;
|
2229 |
LocalData := PByte(@LocalDouble);
|
2230 |
end
|
2231 |
end;
|
2232 |
SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
|
2233 |
begin
|
2234 |
LocalDouble := ColData.AsDouble;
|
2235 |
LocalData := PByte(@LocalDouble);
|
2236 |
end;
|
2237 |
SQL_BOOLEAN:
|
2238 |
begin
|
2239 |
LocalBool := ColData.AsBoolean;
|
2240 |
LocalData := PByte(@LocalBool);
|
2241 |
end;
|
2242 |
end;
|
2243 |
|
2244 |
if fdDataType = SQL_VARYING then
|
2245 |
Move(LocalData^, Buffer[fdDataOfs], fdDataLength)
|
2246 |
else
|
2247 |
Move(LocalData^, Buffer[fdDataOfs], fdDataSize)
|
2248 |
end
|
2249 |
else {Null column}
|
2250 |
if fdDataType = SQL_VARYING then
|
2251 |
FillChar(Buffer[fdDataOfs],fdDataLength,0)
|
2252 |
else
|
2253 |
FillChar(Buffer[fdDataOfs],fdDataSize,0);
|
2254 |
end;
|
2255 |
end;
|
2256 |
|
2257 |
function TIBCustomDataSet.GetMasterDetailDelay: integer;
|
2258 |
begin
|
2259 |
Result := FDataLink.DelayTimerValue;
|
2260 |
end;
|
2261 |
|
2262 |
{ Read the record from FQSelect.Current into the record buffer
|
2263 |
Then write the buffer to in memory cache }
|
2264 |
procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
|
2265 |
RecordNumber: Integer; Buffer: PChar);
|
2266 |
var
|
2267 |
pbd: PBlobDataArray;
|
2268 |
pda: PArrayDataArray;
|
2269 |
i, j: Integer;
|
2270 |
FieldsLoaded: Integer;
|
2271 |
p: PRecordData;
|
2272 |
begin
|
2273 |
if RecordNumber = -1 then
|
2274 |
begin
|
2275 |
InitModelBuffer(Qry,Buffer);
|
2276 |
Exit;
|
2277 |
end;
|
2278 |
p := PRecordData(Buffer);
|
2279 |
{ Make sure blob cache is empty }
|
2280 |
pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
|
2281 |
pda := PArrayDataArray(Buffer + FArrayCacheOffset);
|
2282 |
for i := 0 to BlobFieldCount - 1 do
|
2283 |
pbd^[i] := nil;
|
2284 |
for i := 0 to ArrayFieldCount - 1 do
|
2285 |
pda^[i] := nil;
|
2286 |
|
2287 |
{ Get record information }
|
2288 |
p^.rdBookmarkFlag := bfCurrent;
|
2289 |
p^.rdFieldCount := Qry.FieldCount;
|
2290 |
p^.rdRecordNumber := RecordNumber;
|
2291 |
p^.rdUpdateStatus := usUnmodified;
|
2292 |
p^.rdCachedUpdateStatus := cusUnmodified;
|
2293 |
p^.rdSavedOffset := $FFFFFFFF;
|
2294 |
|
2295 |
{ Load up the fields }
|
2296 |
FieldsLoaded := FQSelect.MetaData.Count;
|
2297 |
j := 1;
|
2298 |
for i := 0 to Qry.FieldCount - 1 do
|
2299 |
begin
|
2300 |
if (Qry = FQSelect) then
|
2301 |
j := i + 1
|
2302 |
else
|
2303 |
begin
|
2304 |
if FieldsLoaded = 0 then
|
2305 |
break;
|
2306 |
j := FQSelect.FieldIndex[Qry[i].Name] + 1;
|
2307 |
if j < 1 then
|
2308 |
continue
|
2309 |
else
|
2310 |
Dec(FieldsLoaded);
|
2311 |
end;
|
2312 |
with FQSelect.MetaData[j - 1] do
|
2313 |
if GetAliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
|
2314 |
begin
|
2315 |
if (GetSize <= 8) then
|
2316 |
p^.rdDBKey := PIBDBKEY(Qry[i].AsPointer)^;
|
2317 |
continue;
|
2318 |
end;
|
2319 |
if j > 0 then
|
2320 |
ColumnDataToBuffer(Qry.Current,i,j,Buffer);
|
2321 |
end;
|
2322 |
WriteRecordCache(RecordNumber, Buffer);
|
2323 |
end;
|
2324 |
|
2325 |
function TIBCustomDataSet.GetActiveBuf: PChar;
|
2326 |
begin
|
2327 |
case State of
|
2328 |
dsBrowse:
|
2329 |
if IsEmpty then
|
2330 |
result := nil
|
2331 |
else
|
2332 |
result := ActiveBuffer;
|
2333 |
dsEdit, dsInsert:
|
2334 |
result := ActiveBuffer;
|
2335 |
dsCalcFields:
|
2336 |
result := CalcBuffer;
|
2337 |
dsFilter:
|
2338 |
result := FFilterBuffer;
|
2339 |
dsNewValue:
|
2340 |
result := ActiveBuffer;
|
2341 |
dsOldValue:
|
2342 |
if (PRecordData(ActiveBuffer)^.rdRecordNumber =
|
2343 |
PRecordData(FOldBuffer)^.rdRecordNumber) then
|
2344 |
result := FOldBuffer
|
2345 |
else
|
2346 |
result := ActiveBuffer;
|
2347 |
else if not FOpen then
|
2348 |
result := nil
|
2349 |
else
|
2350 |
result := ActiveBuffer;
|
2351 |
end;
|
2352 |
end;
|
2353 |
|
2354 |
function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
|
2355 |
begin
|
2356 |
if Active then
|
2357 |
result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
|
2358 |
else
|
2359 |
result := cusUnmodified;
|
2360 |
end;
|
2361 |
|
2362 |
function TIBCustomDataSet.GetDatabase: TIBDatabase;
|
2363 |
begin
|
2364 |
result := FBase.Database;
|
2365 |
end;
|
2366 |
|
2367 |
function TIBCustomDataSet.GetDeleteSQL: TStrings;
|
2368 |
begin
|
2369 |
result := FQDelete.SQL;
|
2370 |
end;
|
2371 |
|
2372 |
function TIBCustomDataSet.GetInsertSQL: TStrings;
|
2373 |
begin
|
2374 |
result := FQInsert.SQL;
|
2375 |
end;
|
2376 |
|
2377 |
function TIBCustomDataSet.GetSQLParams: ISQLParams;
|
2378 |
begin
|
2379 |
if not FInternalPrepared then
|
2380 |
InternalPrepare;
|
2381 |
result := FQSelect.Params;
|
2382 |
end;
|
2383 |
|
2384 |
function TIBCustomDataSet.GetRefreshSQL: TStrings;
|
2385 |
begin
|
2386 |
result := FQRefresh.SQL;
|
2387 |
end;
|
2388 |
|
2389 |
function TIBCustomDataSet.GetSelectSQL: TStrings;
|
2390 |
begin
|
2391 |
result := FQSelect.SQL;
|
2392 |
end;
|
2393 |
|
2394 |
function TIBCustomDataSet.GetStatementType: TIBSQLStatementTypes;
|
2395 |
begin
|
2396 |
result := FQSelect.SQLStatementType;
|
2397 |
end;
|
2398 |
|
2399 |
function TIBCustomDataSet.GetModifySQL: TStrings;
|
2400 |
begin
|
2401 |
result := FQModify.SQL;
|
2402 |
end;
|
2403 |
|
2404 |
function TIBCustomDataSet.GetTransaction: TIBTransaction;
|
2405 |
begin
|
2406 |
result := FBase.Transaction;
|
2407 |
end;
|
2408 |
|
2409 |
procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
|
2410 |
begin
|
2411 |
if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
|
2412 |
FUpdateObject.Apply(ukDelete,Buff)
|
2413 |
else
|
2414 |
begin
|
2415 |
SetInternalSQLParams(FQDelete.Params, Buff);
|
2416 |
FQDelete.ExecQuery;
|
2417 |
if (FQDelete.FieldCount > 0) then
|
2418 |
DoDeleteReturning(FQDelete.Current);
|
2419 |
end;
|
2420 |
with PRecordData(Buff)^ do
|
2421 |
begin
|
2422 |
rdUpdateStatus := usDeleted;
|
2423 |
rdCachedUpdateStatus := cusUnmodified;
|
2424 |
end;
|
2425 |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
|
2426 |
end;
|
2427 |
|
2428 |
function TIBCustomDataSet.InternalLocate(const KeyFields: string;
|
2429 |
const KeyValues: Variant; Options: TLocateOptions): Boolean;
|
2430 |
var
|
2431 |
keyFieldList: TList;
|
2432 |
CurBookmark: TBookmark;
|
2433 |
fieldValue: Variant;
|
2434 |
lookupValues: array of variant;
|
2435 |
i, fieldCount: Integer;
|
2436 |
fieldValueAsString: string;
|
2437 |
lookupValueAsString: string;
|
2438 |
begin
|
2439 |
keyFieldList := TList.Create;
|
2440 |
try
|
2441 |
GetFieldList(keyFieldList, KeyFields);
|
2442 |
fieldCount := keyFieldList.Count;
|
2443 |
CurBookmark := Bookmark;
|
2444 |
result := false;
|
2445 |
SetLength(lookupValues, fieldCount);
|
2446 |
if not EOF then
|
2447 |
begin
|
2448 |
for i := 0 to fieldCount - 1 do {expand key values into lookupValues array}
|
2449 |
begin
|
2450 |
if VarIsArray(KeyValues) then
|
2451 |
lookupValues[i] := KeyValues[i]
|
2452 |
else
|
2453 |
if i > 0 then
|
2454 |
lookupValues[i] := NULL
|
2455 |
else
|
2456 |
lookupValues[0] := KeyValues;
|
2457 |
|
2458 |
{convert to upper case is case insensitive search}
|
2459 |
if (TField(keyFieldList[i]).DataType = ftString) and
|
2460 |
not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
|
2461 |
lookupValues[i] := UpperCase(lookupValues[i]);
|
2462 |
end;
|
2463 |
end;
|
2464 |
while not result and not EOF do {search for a matching record}
|
2465 |
begin
|
2466 |
i := 0;
|
2467 |
result := true;
|
2468 |
while result and (i < fieldCount) do
|
2469 |
{see if all of the key fields matches}
|
2470 |
begin
|
2471 |
fieldValue := TField(keyFieldList[i]).Value;
|
2472 |
result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
|
2473 |
if result and not VarIsNull(fieldValue) then
|
2474 |
begin
|
2475 |
try
|
2476 |
if TField(keyFieldList[i]).DataType = ftString then
|
2477 |
begin
|
2478 |
{strings need special handling because of the locate options that
|
2479 |
apply to them}
|
2480 |
fieldValueAsString := TField(keyFieldList[i]).AsString;
|
2481 |
lookupValueAsString := lookupValues[i];
|
2482 |
if (loCaseInsensitive in Options) then
|
2483 |
fieldValueAsString := UpperCase(fieldValueAsString);
|
2484 |
|
2485 |
if (loPartialKey in Options) then
|
2486 |
result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
|
2487 |
else
|
2488 |
result := result and (fieldValueAsString = lookupValueAsString);
|
2489 |
end
|
2490 |
else
|
2491 |
result := result and (lookupValues[i] =
|
2492 |
VarAsType(fieldValue, VarType(lookupValues[i])));
|
2493 |
except on EVariantError do
|
2494 |
result := False;
|
2495 |
end;
|
2496 |
end;
|
2497 |
Inc(i);
|
2498 |
end;
|
2499 |
if not result then
|
2500 |
Next;
|
2501 |
end;
|
2502 |
if not result then
|
2503 |
Bookmark := CurBookmark
|
2504 |
else
|
2505 |
CursorPosChanged;
|
2506 |
finally
|
2507 |
keyFieldList.Free;
|
2508 |
SetLength(lookupValues,0)
|
2509 |
end;
|
2510 |
end;
|
2511 |
|
2512 |
procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
|
2513 |
var
|
2514 |
i, j, k, arr: Integer;
|
2515 |
pbd: PBlobDataArray;
|
2516 |
pda: PArrayDataArray;
|
2517 |
begin
|
2518 |
pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
|
2519 |
pda := PArrayDataArray(PChar(Buff) + FArrayCacheOffset);
|
2520 |
j := 0; arr := 0;
|
2521 |
for i := 0 to FieldCount - 1 do
|
2522 |
if Fields[i].IsBlob then
|
2523 |
begin
|
2524 |
k := FMappedFieldPosition[Fields[i].FieldNo -1];
|
2525 |
if pbd^[j] <> nil then
|
2526 |
begin
|
2527 |
pbd^[j].Finalize;
|
2528 |
PISC_QUAD(
|
2529 |
PChar(Buff) + FFieldColumns^[k].fdDataOfs)^ :=
|
2530 |
pbd^[j].BlobID;
|
2531 |
PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
|
2532 |
end
|
2533 |
else
|
2534 |
begin
|
2535 |
PRecordData(Buff)^.rdFields[k].fdIsNull := true;
|
2536 |
with PISC_QUAD(PChar(Buff) + FFieldColumns^[k].fdDataOfs)^ do
|
2537 |
begin
|
2538 |
gds_quad_high := 0;
|
2539 |
gds_quad_low := 0;
|
2540 |
end;
|
2541 |
end;
|
2542 |
Inc(j);
|
2543 |
end
|
2544 |
else
|
2545 |
if Fields[i] is TIBArrayField then
|
2546 |
begin
|
2547 |
if pda^[arr] <> nil then
|
2548 |
begin
|
2549 |
k := FMappedFieldPosition[Fields[i].FieldNo -1];
|
2550 |
PISC_QUAD(
|
2551 |
PChar(Buff) + FFieldColumns^[k].fdDataOfs)^ := pda^[arr].ArrayIntf.GetArrayID;
|
2552 |
PRecordData(Buff)^.rdFields[k].fdIsNull := pda^[arr].ArrayIntf.IsEmpty;
|
2553 |
end;
|
2554 |
Inc(arr);
|
2555 |
end;
|
2556 |
FBufferUpdatedOnQryReturn := false;
|
2557 |
if Assigned(FUpdateObject) then
|
2558 |
begin
|
2559 |
if (Qry = FQDelete) then
|
2560 |
FUpdateObject.Apply(ukDelete,Buff)
|
2561 |
else if (Qry = FQInsert) then
|
2562 |
FUpdateObject.Apply(ukInsert,Buff)
|
2563 |
else
|
2564 |
FUpdateObject.Apply(ukModify,Buff);
|
2565 |
FUpdateObject.GetRowsAffected(FSelectCount, FInsertCount, FUpdateCount, FDeleteCount);
|
2566 |
end
|
2567 |
else begin
|
2568 |
SetInternalSQLParams(Qry.Params, Buff);
|
2569 |
Qry.ExecQuery;
|
2570 |
Qry.Statement.GetRowsAffected(FSelectCount, FInsertCount, FUpdateCount, FDeleteCount);
|
2571 |
if Qry.FieldCount > 0 then {Has RETURNING Clause}
|
2572 |
UpdateRecordFromQuery(Qry.Current,Buff);
|
2573 |
end;
|
2574 |
PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
|
2575 |
PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
|
2576 |
SetModified(False);
|
2577 |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
|
2578 |
if (FForcedRefresh or (FNeedsRefresh and not FBufferUpdatedOnQryReturn)) and CanRefresh then
|
2579 |
InternalRefreshRow;
|
2580 |
end;
|
2581 |
|
2582 |
procedure TIBCustomDataSet.InternalRefreshRow;
|
2583 |
var
|
2584 |
Buff: PChar;
|
2585 |
ofs: DWORD;
|
2586 |
Qry: TIBSQL;
|
2587 |
begin
|
2588 |
FBase.SetCursor;
|
2589 |
try
|
2590 |
Buff := GetActiveBuf;
|
2591 |
if CanRefresh then
|
2592 |
begin
|
2593 |
if Buff <> nil then
|
2594 |
begin
|
2595 |
if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
|
2596 |
begin
|
2597 |
Qry := TIBSQL.Create(self);
|
2598 |
Qry.Database := Database;
|
2599 |
Qry.Transaction := Transaction;
|
2600 |
Qry.GoToFirstRecordOnExecute := False;
|
2601 |
Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
|
2602 |
end
|
2603 |
else
|
2604 |
Qry := FQRefresh;
|
2605 |
SetInternalSQLParams(Qry.Params, Buff);
|
2606 |
Qry.ExecQuery;
|
2607 |
try
|
2608 |
if (Qry.SQLStatementType = SQLExecProcedure) or Qry.Next then
|
2609 |
begin
|
2610 |
ofs := PRecordData(Buff)^.rdSavedOffset;
|
2611 |
FetchCurrentRecordToBuffer(Qry,
|
2612 |
PRecordData(Buff)^.rdRecordNumber,
|
2613 |
Buff);
|
2614 |
if FCachedUpdates and (ofs <> $FFFFFFFF) then
|
2615 |
begin
|
2616 |
PRecordData(Buff)^.rdSavedOffset := ofs;
|
2617 |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
|
2618 |
SaveOldBuffer(Buff);
|
2619 |
end;
|
2620 |
end;
|
2621 |
finally
|
2622 |
Qry.Close;
|
2623 |
end;
|
2624 |
if Qry <> FQRefresh then
|
2625 |
Qry.Free;
|
2626 |
end
|
2627 |
end
|
2628 |
else
|
2629 |
IBError(ibxeCannotRefresh, [nil]);
|
2630 |
finally
|
2631 |
FBase.RestoreCursor;
|
2632 |
end;
|
2633 |
end;
|
2634 |
|
2635 |
procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
|
2636 |
var
|
2637 |
NewBuffer, OldBuffer: PRecordData;
|
2638 |
|
2639 |
begin
|
2640 |
NewBuffer := nil;
|
2641 |
OldBuffer := nil;
|
2642 |
NewBuffer := PRecordData(AllocRecordBuffer);
|
2643 |
OldBuffer := PRecordData(AllocRecordBuffer);
|
2644 |
try
|
2645 |
ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
|
2646 |
ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
|
2647 |
case NewBuffer^.rdCachedUpdateStatus of
|
2648 |
cusInserted:
|
2649 |
begin
|
2650 |
NewBuffer^.rdCachedUpdateStatus := cusUninserted;
|
2651 |
Inc(FDeletedRecords);
|
2652 |
end;
|
2653 |
cusModified,
|
2654 |
cusDeleted:
|
2655 |
begin
|
2656 |
if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
|
2657 |
Dec(FDeletedRecords);
|
2658 |
CopyRecordBuffer(OldBuffer, NewBuffer);
|
2659 |
end;
|
2660 |
end;
|
2661 |
|
2662 |
if State in dsEditModes then
|
2663 |
Cancel;
|
2664 |
|
2665 |
WriteRecordCache(RecordNumber, PChar(NewBuffer));
|
2666 |
|
2667 |
if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
|
2668 |
ReSync([]);
|
2669 |
finally
|
2670 |
FreeRecordBuffer(PChar(NewBuffer));
|
2671 |
FreeRecordBuffer(PChar(OldBuffer));
|
2672 |
end;
|
2673 |
end;
|
2674 |
|
2675 |
{ A visible record is one that is not truly deleted,
|
2676 |
and it is also listed in the FUpdateRecordTypes set }
|
2677 |
|
2678 |
function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
|
2679 |
begin
|
2680 |
result := True;
|
2681 |
if not (State = dsOldValue) then
|
2682 |
result :=
|
2683 |
(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
|
2684 |
(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
|
2685 |
(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
|
2686 |
end;
|
2687 |
|
2688 |
|
2689 |
function TIBCustomDataSet.LocateNext(const KeyFields: string;
|
2690 |
const KeyValues: Variant; Options: TLocateOptions): Boolean;
|
2691 |
begin
|
2692 |
DisableControls;
|
2693 |
try
|
2694 |
result := InternalLocate(KeyFields, KeyValues, Options);
|
2695 |
finally
|
2696 |
EnableControls;
|
2697 |
end;
|
2698 |
end;
|
2699 |
|
2700 |
procedure TIBCustomDataSet.InternalPrepare;
|
2701 |
begin
|
2702 |
if FInternalPrepared then
|
2703 |
Exit;
|
2704 |
FBase.SetCursor;
|
2705 |
try
|
2706 |
ActivateConnection;
|
2707 |
ActivateTransaction;
|
2708 |
FBase.CheckDatabase;
|
2709 |
FBase.CheckTransaction;
|
2710 |
if HasParser and (FParser.SQLText <> FQSelect.SQL.Text) then
|
2711 |
begin
|
2712 |
FQSelect.OnSQLChanged := nil; {Do not react to change}
|
2713 |
try
|
2714 |
FQSelect.SQL.Text := FParser.SQLText;
|
2715 |
finally
|
2716 |
FQSelect.OnSQLChanged := SQLChanged;
|
2717 |
end;
|
2718 |
end;
|
2719 |
// writeln( FQSelect.SQL.Text);
|
2720 |
if FQSelect.SQL.Text <> '' then
|
2721 |
begin
|
2722 |
if not FQSelect.Prepared then
|
2723 |
begin
|
2724 |
FQSelect.GenerateParamNames := FGenerateParamNames;
|
2725 |
FQSelect.ParamCheck := ParamCheck;
|
2726 |
FQSelect.Prepare;
|
2727 |
end;
|
2728 |
FQDelete.GenerateParamNames := FGenerateParamNames;
|
2729 |
if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
|
2730 |
FQDelete.Prepare;
|
2731 |
FQInsert.GenerateParamNames := FGenerateParamNames;
|
2732 |
if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
|
2733 |
FQInsert.Prepare;
|
2734 |
FQRefresh.GenerateParamNames := FGenerateParamNames;
|
2735 |
if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
|
2736 |
FQRefresh.Prepare;
|
2737 |
FQModify.GenerateParamNames := FGenerateParamNames;
|
2738 |
if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
|
2739 |
FQModify.Prepare;
|
2740 |
FInternalPrepared := True;
|
2741 |
InternalInitFieldDefs;
|
2742 |
end else
|
2743 |
IBError(ibxeEmptyQuery, [nil]);
|
2744 |
finally
|
2745 |
FBase.RestoreCursor;
|
2746 |
end;
|
2747 |
end;
|
2748 |
|
2749 |
procedure TIBCustomDataSet.RecordModified(Value: Boolean);
|
2750 |
begin
|
2751 |
SetModified(Value);
|
2752 |
end;
|
2753 |
|
2754 |
procedure TIBCustomDataSet.RevertRecord;
|
2755 |
var
|
2756 |
Buff: PRecordData;
|
2757 |
begin
|
2758 |
if FCachedUpdates and FUpdatesPending then
|
2759 |
begin
|
2760 |
Buff := PRecordData(GetActiveBuf);
|
2761 |
InternalRevertRecord(Buff^.rdRecordNumber);
|
2762 |
ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
|
2763 |
DataEvent(deRecordChange, 0);
|
2764 |
end;
|
2765 |
end;
|
2766 |
|
2767 |
procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
|
2768 |
var
|
2769 |
OldBuffer: Pointer;
|
2770 |
procedure CopyOldBuffer;
|
2771 |
begin
|
2772 |
CopyRecordBuffer(Buffer, OldBuffer);
|
2773 |
if BlobFieldCount > 0 then
|
2774 |
FillChar(PChar(OldBuffer)[FBlobCacheOffset],
|
2775 |
BlobFieldCount * SizeOf(TIBBlobStream) + ArrayFieldCount * SizeOf(IArray),
|
2776 |
0);
|
2777 |
end;
|
2778 |
|
2779 |
begin
|
2780 |
if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
|
2781 |
begin
|
2782 |
OldBuffer := AllocRecordBuffer;
|
2783 |
try
|
2784 |
if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
|
2785 |
begin
|
2786 |
PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
|
2787 |
FILE_END);
|
2788 |
CopyOldBuffer;
|
2789 |
WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
|
2790 |
WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
|
2791 |
FILE_BEGIN, Buffer);
|
2792 |
end
|
2793 |
else begin
|
2794 |
CopyOldBuffer;
|
2795 |
WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
|
2796 |
OldBuffer);
|
2797 |
end;
|
2798 |
finally
|
2799 |
FreeRecordBuffer(PChar(OldBuffer));
|
2800 |
end;
|
2801 |
end;
|
2802 |
end;
|
2803 |
|
2804 |
procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
|
2805 |
begin
|
2806 |
if (Value <= 0) then
|
2807 |
FBufferChunks := BufferCacheSize
|
2808 |
else
|
2809 |
FBufferChunks := Value;
|
2810 |
end;
|
2811 |
|
2812 |
procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
|
2813 |
begin
|
2814 |
if (csLoading in ComponentState) or (FBase.Database <> Value) then
|
2815 |
begin
|
2816 |
CheckDatasetClosed;
|
2817 |
InternalUnPrepare;
|
2818 |
FBase.Database := Value;
|
2819 |
FQDelete.Database := Value;
|
2820 |
FQInsert.Database := Value;
|
2821 |
FQRefresh.Database := Value;
|
2822 |
FQSelect.Database := Value;
|
2823 |
FQModify.Database := Value;
|
2824 |
FDatabaseInfo.Database := Value;
|
2825 |
FGeneratorField.Database := Value;
|
2826 |
end;
|
2827 |
end;
|
2828 |
|
2829 |
procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
|
2830 |
begin
|
2831 |
if FQDelete.SQL.Text <> Value.Text then
|
2832 |
begin
|
2833 |
Disconnect;
|
2834 |
FQDelete.SQL.Assign(Value);
|
2835 |
end;
|
2836 |
end;
|
2837 |
|
2838 |
procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
|
2839 |
begin
|
2840 |
if FQInsert.SQL.Text <> Value.Text then
|
2841 |
begin
|
2842 |
Disconnect;
|
2843 |
FQInsert.SQL.Assign(Value);
|
2844 |
end;
|
2845 |
end;
|
2846 |
|
2847 |
procedure TIBCustomDataSet.SetInternalSQLParams(Params: ISQLParams; Buffer: Pointer);
|
2848 |
var
|
2849 |
i, j: Integer;
|
2850 |
cr, data: PChar;
|
2851 |
fn: string;
|
2852 |
st: RawByteString;
|
2853 |
OldBuffer: Pointer;
|
2854 |
Param: ISQLParam;
|
2855 |
begin
|
2856 |
if (Buffer = nil) then
|
2857 |
IBError(ibxeBufferNotSet, [nil]);
|
2858 |
if (not FInternalPrepared) then
|
2859 |
InternalPrepare;
|
2860 |
OldBuffer := nil;
|
2861 |
try
|
2862 |
for i := 0 to Params.GetCount - 1 do
|
2863 |
begin
|
2864 |
Param := Params[i];
|
2865 |
fn := Param.Name;
|
2866 |
if (Pos('OLD_', fn) = 1) then {mbcs ok}
|
2867 |
begin
|
2868 |
fn := Copy(fn, 5, Length(fn));
|
2869 |
if not Assigned(OldBuffer) then
|
2870 |
begin
|
2871 |
OldBuffer := AllocRecordBuffer;
|
2872 |
ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
|
2873 |
end;
|
2874 |
cr := OldBuffer;
|
2875 |
end
|
2876 |
else if (Pos('NEW_', fn) = 1) then {mbcs ok}
|
2877 |
begin
|
2878 |
fn := Copy(fn, 5, Length(fn));
|
2879 |
cr := Buffer;
|
2880 |
end
|
2881 |
else
|
2882 |
cr := Buffer;
|
2883 |
j := FQSelect.FieldIndex[fn] + 1;
|
2884 |
if (j > 0) then
|
2885 |
with PRecordData(cr)^,rdFields[j], FFieldColumns^[j] do
|
2886 |
begin
|
2887 |
if Param.name = 'IBX_INTERNAL_DBKEY' then {do not localize}
|
2888 |
begin
|
2889 |
PIBDBKey(Param.AsPointer)^ := rdDBKey;
|
2890 |
continue;
|
2891 |
end;
|
2892 |
if fdIsNull then
|
2893 |
Param.IsNull := True
|
2894 |
else begin
|
2895 |
Param.IsNull := False;
|
2896 |
data := cr + fdDataOfs;
|
2897 |
case fdDataType of
|
2898 |
SQL_TEXT, SQL_VARYING:
|
2899 |
begin
|
2900 |
SetString(st, data, fdDataLength);
|
2901 |
SetCodePage(st,fdCodePage,false);
|
2902 |
Param.AsString := st;
|
2903 |
end;
|
2904 |
SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
|
2905 |
Param.AsDouble := PDouble(data)^;
|
2906 |
SQL_SHORT, SQL_LONG:
|
2907 |
begin
|
2908 |
if fdDataScale = 0 then
|
2909 |
Param.AsLong := PLong(data)^
|
2910 |
else
|
2911 |
if fdDataScale >= (-4) then
|
2912 |
Param.AsCurrency := PCurrency(data)^
|
2913 |
else
|
2914 |
Param.AsDouble := PDouble(data)^;
|
2915 |
end;
|
2916 |
SQL_INT64:
|
2917 |
begin
|
2918 |
if fdDataScale = 0 then
|
2919 |
Param.AsInt64 := PInt64(data)^
|
2920 |
else
|
2921 |
if fdDataScale >= (-4) then
|
2922 |
Param.AsCurrency := PCurrency(data)^
|
2923 |
else
|
2924 |
Param.AsDouble := PDouble(data)^;
|
2925 |
end;
|
2926 |
SQL_BLOB, SQL_ARRAY, SQL_QUAD:
|
2927 |
Param.AsQuad := PISC_QUAD(data)^;
|
2928 |
SQL_TYPE_DATE,
|
2929 |
SQL_TYPE_TIME,
|
2930 |
SQL_TIMESTAMP:
|
2931 |
{This is an IBX native format and not the TDataset approach. See also SetFieldData}
|
2932 |
Param.AsDateTime := PDateTime(data)^;
|
2933 |
SQL_BOOLEAN:
|
2934 |
Param.AsBoolean := PWordBool(data)^;
|
2935 |
end;
|
2936 |
end;
|
2937 |
end;
|
2938 |
end;
|
2939 |
finally
|
2940 |
if (OldBuffer <> nil) then
|
2941 |
FreeRecordBuffer(PChar(OldBuffer));
|
2942 |
end;
|
2943 |
end;
|
2944 |
|
2945 |
procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
|
2946 |
begin
|
2947 |
if FQRefresh.SQL.Text <> Value.Text then
|
2948 |
begin
|
2949 |
Disconnect;
|
2950 |
FQRefresh.SQL.Assign(Value);
|
2951 |
end;
|
2952 |
end;
|
2953 |
|
2954 |
procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
|
2955 |
begin
|
2956 |
if FQSelect.SQL.Text <> Value.Text then
|
2957 |
begin
|
2958 |
Disconnect;
|
2959 |
FQSelect.SQL.Assign(Value);
|
2960 |
end;
|
2961 |
end;
|
2962 |
|
2963 |
procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
|
2964 |
begin
|
2965 |
if FQModify.SQL.Text <> Value.Text then
|
2966 |
begin
|
2967 |
Disconnect;
|
2968 |
FQModify.SQL.Assign(Value);
|
2969 |
end;
|
2970 |
end;
|
2971 |
|
2972 |
procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
|
2973 |
begin
|
2974 |
if (FBase.Transaction <> Value) then
|
2975 |
begin
|
2976 |
CheckDatasetClosed;
|
2977 |
FBase.Transaction := Value;
|
2978 |
FQDelete.Transaction := Value;
|
2979 |
FQInsert.Transaction := Value;
|
2980 |
FQRefresh.Transaction := Value;
|
2981 |
FQSelect.Transaction := Value;
|
2982 |
FQModify.Transaction := Value;
|
2983 |
FGeneratorField.Transaction := Value;
|
2984 |
end;
|
2985 |
end;
|
2986 |
|
2987 |
procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
|
2988 |
begin
|
2989 |
CheckDatasetClosed;
|
2990 |
FUniDirectional := Value;
|
2991 |
end;
|
2992 |
|
2993 |
procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
|
2994 |
begin
|
2995 |
FUpdateRecordTypes := Value;
|
2996 |
if Active then
|
2997 |
First;
|
2998 |
end;
|
2999 |
|
3000 |
procedure TIBCustomDataSet.RefreshParams;
|
3001 |
var
|
3002 |
DataSet: TDataSet;
|
3003 |
begin
|
3004 |
DisableControls;
|
3005 |
try
|
3006 |
if FDataLink.DataSource <> nil then
|
3007 |
begin
|
3008 |
DataSet := FDataLink.DataSource.DataSet;
|
3009 |
if DataSet <> nil then
|
3010 |
if DataSet.Active and (DataSet.State <> dsSetKey) then
|
3011 |
begin
|
3012 |
Close;
|
3013 |
Open;
|
3014 |
end;
|
3015 |
end;
|
3016 |
finally
|
3017 |
EnableControls;
|
3018 |
end;
|
3019 |
end;
|
3020 |
|
3021 |
procedure TIBCustomDataSet.RegisterIBLink(Sender: TIBControlLink);
|
3022 |
begin
|
3023 |
if FIBLinks.IndexOf(Sender) = -1 then
|
3024 |
begin
|
3025 |
FIBLinks.Add(Sender);
|
3026 |
if Active then
|
3027 |
begin
|
3028 |
Active := false;
|
3029 |
Active := true;
|
3030 |
end;
|
3031 |
end;
|
3032 |
end;
|
3033 |
|
3034 |
|
3035 |
procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
|
3036 |
begin
|
3037 |
Active := false;
|
3038 |
{ if FOpen then
|
3039 |
InternalClose;}
|
3040 |
if FInternalPrepared then
|
3041 |
InternalUnPrepare;
|
3042 |
FieldDefs.Clear;
|
3043 |
FieldDefs.Updated := false;
|
3044 |
end;
|
3045 |
|
3046 |
procedure TIBCustomDataSet.SQLChanged(Sender: TObject);
|
3047 |
begin
|
3048 |
FBaseSQLSelect.assign(FQSelect.SQL);
|
3049 |
end;
|
3050 |
|
3051 |
{ I can "undelete" uninserted records (make them "inserted" again).
|
3052 |
I can "undelete" cached deleted (the deletion hasn't yet occurred) }
|
3053 |
procedure TIBCustomDataSet.Undelete;
|
3054 |
var
|
3055 |
Buff: PRecordData;
|
3056 |
begin
|
3057 |
CheckActive;
|
3058 |
Buff := PRecordData(GetActiveBuf);
|
3059 |
with Buff^ do
|
3060 |
begin
|
3061 |
if rdCachedUpdateStatus = cusUninserted then
|
3062 |
begin
|
3063 |
rdCachedUpdateStatus := cusInserted;
|
3064 |
Dec(FDeletedRecords);
|
3065 |
end
|
3066 |
else if (rdUpdateStatus = usDeleted) and
|
3067 |
(rdCachedUpdateStatus = cusDeleted) then
|
3068 |
begin
|
3069 |
rdCachedUpdateStatus := cusUnmodified;
|
3070 |
rdUpdateStatus := usUnmodified;
|
3071 |
Dec(FDeletedRecords);
|
3072 |
end;
|
3073 |
WriteRecordCache(rdRecordNumber, PChar(Buff));
|
3074 |
end;
|
3075 |
end;
|
3076 |
|
3077 |
procedure TIBCustomDataSet.UnRegisterIBLink(Sender: TIBControlLink);
|
3078 |
begin
|
3079 |
FIBLinks.Remove(Sender);
|
3080 |
end;
|
3081 |
|
3082 |
function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
|
3083 |
begin
|
3084 |
if Active then
|
3085 |
if GetActiveBuf <> nil then
|
3086 |
result := PRecordData(GetActiveBuf)^.rdUpdateStatus
|
3087 |
else
|
3088 |
result := usUnmodified
|
3089 |
else
|
3090 |
result := usUnmodified;
|
3091 |
end;
|
3092 |
|
3093 |
function TIBCustomDataSet.IsSequenced: Boolean;
|
3094 |
begin
|
3095 |
Result := Assigned( FQSelect ) and FQSelect.EOF;
|
3096 |
end;
|
3097 |
|
3098 |
function TIBCustomDataSet.ParamByName(ParamName: String): ISQLParam;
|
3099 |
begin
|
3100 |
ActivateConnection;
|
3101 |
ActivateTransaction;
|
3102 |
if not FInternalPrepared then
|
3103 |
InternalPrepare;
|
3104 |
Result := Params.ByName(ParamName);
|
3105 |
end;
|
3106 |
|
3107 |
function TIBCustomDataSet.GetRowsAffected(var SelectCount, InsertCount,
|
3108 |
UpdateCount, DeleteCount: integer): boolean;
|
3109 |
begin
|
3110 |
Result := Active;
|
3111 |
SelectCount := FSelectCount;
|
3112 |
InsertCount := FInsertCount;
|
3113 |
UpdateCount := FUpdateCount;
|
3114 |
DeleteCount := FDeleteCount;
|
3115 |
end;
|
3116 |
|
3117 |
function TIBCustomDataSet.GetPerfStatistics(var stats: TPerfCounters): boolean;
|
3118 |
begin
|
3119 |
Result := EnableStatistics and (FQSelect.Statement <> nil) and
|
3120 |
FQSelect.Statement.GetPerfStatistics(stats);
|
3121 |
end;
|
3122 |
|
3123 |
{Beware: the parameter FCache is used as an identifier to determine which
|
3124 |
cache is being operated on and is not referenced in the computation.
|
3125 |
The result is an adjusted offset into the identified cache, either the
|
3126 |
Buffer Cache or the old Buffer Cache.}
|
3127 |
|
3128 |
function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
|
3129 |
Origin: Integer): DWORD;
|
3130 |
var
|
3131 |
OldCacheSize: Integer;
|
3132 |
begin
|
3133 |
if (FCache = FBufferCache) then
|
3134 |
begin
|
3135 |
case Origin of
|
3136 |
FILE_BEGIN: FBPos := Offset;
|
3137 |
FILE_CURRENT: FBPos := FBPos + Offset;
|
3138 |
FILE_END: FBPos := DWORD(FBEnd) + Offset;
|
3139 |
end;
|
3140 |
OldCacheSize := FCacheSize;
|
3141 |
while (FBPos >= DWORD(FCacheSize)) do
|
3142 |
Inc(FCacheSize, FBufferChunkSize);
|
3143 |
if FCacheSize > OldCacheSize then
|
3144 |
IBAlloc(FBufferCache, FCacheSize, FCacheSize);
|
3145 |
result := FBPos;
|
3146 |
end
|
3147 |
else begin
|
3148 |
case Origin of
|
3149 |
FILE_BEGIN: FOBPos := Offset;
|
3150 |
FILE_CURRENT: FOBPos := FOBPos + Offset;
|
3151 |
FILE_END: FOBPos := DWORD(FOBEnd) + Offset;
|
3152 |
end;
|
3153 |
OldCacheSize := FOldCacheSize;
|
3154 |
while (FBPos >= DWORD(FOldCacheSize)) do
|
3155 |
Inc(FOldCacheSize, FBufferChunkSize);
|
3156 |
if FOldCacheSize > OldCacheSize then
|
3157 |
IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
|
3158 |
result := FOBPos;
|
3159 |
end;
|
3160 |
end;
|
3161 |
|
3162 |
procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
|
3163 |
Buffer: PChar);
|
3164 |
var
|
3165 |
pCache: PChar;
|
3166 |
AdjustedOffset: DWORD;
|
3167 |
bOld: Boolean;
|
3168 |
begin
|
3169 |
bOld := (FCache = FOldBufferCache);
|
3170 |
AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
|
3171 |
if not bOld then
|
3172 |
pCache := FBufferCache + AdjustedOffset
|
3173 |
else
|
3174 |
pCache := FOldBufferCache + AdjustedOffset;
|
3175 |
Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
|
3176 |
AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
|
3177 |
end;
|
3178 |
|
3179 |
procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
|
3180 |
ReadOldBuffer: Boolean);
|
3181 |
begin
|
3182 |
if FUniDirectional then
|
3183 |
RecordNumber := RecordNumber mod UniCache;
|
3184 |
if (ReadOldBuffer) then
|
3185 |
begin
|
3186 |
ReadRecordCache(RecordNumber, Buffer, False);
|
3187 |
if FCachedUpdates and
|
3188 |
(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
|
3189 |
ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
|
3190 |
Buffer)
|
3191 |
else
|
3192 |
if ReadOldBuffer and
|
3193 |
(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
|
3194 |
CopyRecordBuffer( FOldBuffer, Buffer )
|
3195 |
end
|
3196 |
else
|
3197 |
ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
|
3198 |
end;
|
3199 |
|
3200 |
procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
|
3201 |
Buffer: PChar);
|
3202 |
var
|
3203 |
pCache: PChar;
|
3204 |
AdjustedOffset: DWORD;
|
3205 |
bOld: Boolean;
|
3206 |
dwEnd: DWORD;
|
3207 |
begin
|
3208 |
bOld := (FCache = FOldBufferCache);
|
3209 |
AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
|
3210 |
if not bOld then
|
3211 |
pCache := FBufferCache + AdjustedOffset
|
3212 |
else
|
3213 |
pCache := FOldBufferCache + AdjustedOffset;
|
3214 |
Move(Buffer^, pCache^, FRecordBufferSize);
|
3215 |
dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
|
3216 |
if not bOld then
|
3217 |
begin
|
3218 |
if (dwEnd > FBEnd) then
|
3219 |
FBEnd := dwEnd;
|
3220 |
end
|
3221 |
else begin
|
3222 |
if (dwEnd > FOBEnd) then
|
3223 |
FOBEnd := dwEnd;
|
3224 |
end;
|
3225 |
end;
|
3226 |
|
3227 |
procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
|
3228 |
begin
|
3229 |
if RecordNumber >= 0 then
|
3230 |
begin
|
3231 |
if FUniDirectional then
|
3232 |
RecordNumber := RecordNumber mod UniCache;
|
3233 |
WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
|
3234 |
end;
|
3235 |
end;
|
3236 |
|
3237 |
function TIBCustomDataSet.AllocRecordBuffer: PChar;
|
3238 |
begin
|
3239 |
result := nil;
|
3240 |
IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
|
3241 |
Move(FModelBuffer^, result^, FRecordBufferSize);
|
3242 |
end;
|
3243 |
|
3244 |
function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
|
3245 |
var
|
3246 |
pb: PBlobDataArray;
|
3247 |
fs: TIBBlobStream;
|
3248 |
Buff: PChar;
|
3249 |
bTr, bDB: Boolean;
|
3250 |
begin
|
3251 |
if (Field = nil) or (Field.DataSet <> self) then
|
3252 |
IBError(ibxFieldNotinDataSet,[Field.Name,Name]);
|
3253 |
Buff := GetActiveBuf;
|
3254 |
if Buff = nil then
|
3255 |
begin
|
3256 |
fs := TIBBlobStream.Create;
|
3257 |
fs.Mode := bmReadWrite;
|
3258 |
fs.Database := Database;
|
3259 |
fs.Transaction := Transaction;
|
3260 |
fs.SetField(Field);
|
3261 |
FBlobStreamList.Add(Pointer(fs));
|
3262 |
result := TIBDSBlobStream.Create(Field, fs, Mode);
|
3263 |
exit;
|
3264 |
end;
|
3265 |
pb := PBlobDataArray(Buff + FBlobCacheOffset);
|
3266 |
if pb^[Field.Offset] = nil then
|
3267 |
begin
|
3268 |
AdjustRecordOnInsert(Buff);
|
3269 |
pb^[Field.Offset] := TIBBlobStream.Create;
|
3270 |
fs := pb^[Field.Offset];
|
3271 |
FBlobStreamList.Add(Pointer(fs));
|
3272 |
fs.Mode := bmReadWrite;
|
3273 |
fs.Database := Database;
|
3274 |
fs.Transaction := Transaction;
|
3275 |
fs.SetField(Field);
|
3276 |
fs.BlobID :=
|
3277 |
PISC_QUAD(@Buff[FFieldColumns^[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
|
3278 |
if (CachedUpdates) then
|
3279 |
begin
|
3280 |
bTr := not Transaction.InTransaction;
|
3281 |
bDB := not Database.Connected;
|
3282 |
if bDB then
|
3283 |
Database.Open;
|
3284 |
if bTr then
|
3285 |
Transaction.StartTransaction;
|
3286 |
fs.Seek(0, soFromBeginning);
|
3287 |
if bTr then
|
3288 |
Transaction.Commit;
|
3289 |
if bDB then
|
3290 |
Database.Close;
|
3291 |
end;
|
3292 |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
|
3293 |
end else
|
3294 |
fs := pb^[Field.Offset];
|
3295 |
result := TIBDSBlobStream.Create(Field, fs, Mode);
|
3296 |
end;
|
3297 |
|
3298 |
function TIBCustomDataSet.GetArray(Field: TIBArrayField): IArray;
|
3299 |
var Buff: PChar;
|
3300 |
pda: PArrayDataArray;
|
3301 |
bTr, bDB: Boolean;
|
3302 |
begin
|
3303 |
if (Field = nil) or (Field.DataSet <> self) then
|
3304 |
IBError(ibxFieldNotinDataSet,[Field.Name,Name]);
|
3305 |
Buff := GetActiveBuf;
|
3306 |
if Buff = nil then
|
3307 |
Result := Database.Attachment.CreateArray(Transaction.TransactionIntf,
|
3308 |
Field.FRelationName,Field.FieldName)
|
3309 |
else
|
3310 |
begin
|
3311 |
pda := PArrayDataArray(Buff + FArrayCacheOffset);
|
3312 |
if pda^[Field.FCacheOffset] = nil then
|
3313 |
begin
|
3314 |
AdjustRecordOnInsert(Buff);
|
3315 |
if Field.IsNull then
|
3316 |
Result := Database.Attachment.CreateArray(Transaction.TransactionIntf,
|
3317 |
Field.FRelationName,Field.FieldName)
|
3318 |
else
|
3319 |
Result := Database.Attachment.OpenArray(Transaction.TransactionIntf,
|
3320 |
Field.FRelationName,Field.FieldName,Field.ArrayID);
|
3321 |
pda^[Field.FCacheOffset] := TIBArray.Create(Field,Result);
|
3322 |
FArrayList.Add(pda^[Field.FCacheOffset]);
|
3323 |
if (CachedUpdates) then
|
3324 |
begin
|
3325 |
bTr := not Transaction.InTransaction;
|
3326 |
bDB := not Database.Connected;
|
3327 |
if bDB then
|
3328 |
Database.Open;
|
3329 |
if bTr then
|
3330 |
Transaction.StartTransaction;
|
3331 |
pda^[Field.FCacheOffset].ArrayIntf.PreLoad;
|
3332 |
if bTr then
|
3333 |
Transaction.Commit;
|
3334 |
if bDB then
|
3335 |
Database.Close;
|
3336 |
end;
|
3337 |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
|
3338 |
end
|
3339 |
else
|
3340 |
Result := pda^[Field.FCacheOffset].ArrayIntf;
|
3341 |
end;
|
3342 |
end;
|
3343 |
|
3344 |
procedure TIBCustomDataSet.SetArrayIntf(AnArray: IArray; Field: TIBArrayField);
|
3345 |
var Buff: PChar;
|
3346 |
pda: PArrayDataArray;
|
3347 |
begin
|
3348 |
if (Field = nil) or (Field.DataSet <> self) then
|
3349 |
IBError(ibxFieldNotinDataSet,[Field.Name,Name]);
|
3350 |
Buff := GetActiveBuf;
|
3351 |
if Buff <> nil then
|
3352 |
begin
|
3353 |
AdjustRecordOnInsert(Buff);
|
3354 |
pda := PArrayDataArray(Buff + FArrayCacheOffset);
|
3355 |
pda^[Field.FCacheOffset].FArray := AnArray;
|
3356 |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
|
3357 |
end;
|
3358 |
end;
|
3359 |
|
3360 |
function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
|
3361 |
const
|
3362 |
CMPLess = -1;
|
3363 |
CMPEql = 0;
|
3364 |
CMPGtr = 1;
|
3365 |
RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
|
3366 |
(CMPGtr, CMPEql));
|
3367 |
begin
|
3368 |
result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
|
3369 |
|
3370 |
if Result = 2 then
|
3371 |
begin
|
3372 |
if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
|
3373 |
Result := CMPLess
|
3374 |
else
|
3375 |
if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
|
3376 |
Result := CMPGtr
|
3377 |
else
|
3378 |
Result := CMPEql;
|
3379 |
end;
|
3380 |
end;
|
3381 |
|
3382 |
procedure TIBCustomDataSet.DoBeforeDelete;
|
3383 |
var
|
3384 |
Buff: PRecordData;
|
3385 |
begin
|
3386 |
if not CanDelete then
|
3387 |
IBError(ibxeCannotDelete, [nil]);
|
3388 |
Buff := PRecordData(GetActiveBuf);
|
3389 |
if FCachedUpdates and
|
3390 |
(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
|
3391 |
SaveOldBuffer(PChar(Buff));
|
3392 |
inherited DoBeforeDelete;
|
3393 |
end;
|
3394 |
|
3395 |
procedure TIBCustomDataSet.DoAfterDelete;
|
3396 |
begin
|
3397 |
inherited DoAfterDelete;
|
3398 |
FBase.DoAfterDelete(self);
|
3399 |
InternalAutoCommit;
|
3400 |
end;
|
3401 |
|
3402 |
procedure TIBCustomDataSet.DoBeforeEdit;
|
3403 |
var
|
3404 |
Buff: PRecordData;
|
3405 |
begin
|
3406 |
Buff := PRecordData(GetActiveBuf);
|
3407 |
if not(CanEdit or (FQModify.SQL.Count <> 0) or
|
3408 |
(FCachedUpdates and Assigned(FOnUpdateRecord))) then
|
3409 |
IBError(ibxeCannotUpdate, [nil]);
|
3410 |
if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
|
3411 |
SaveOldBuffer(PChar(Buff));
|
3412 |
CopyRecordBuffer(GetActiveBuf, FOldBuffer);
|
3413 |
inherited DoBeforeEdit;
|
3414 |
end;
|
3415 |
|
3416 |
procedure TIBCustomDataSet.DoAfterEdit;
|
3417 |
begin
|
3418 |
inherited DoAfterEdit;
|
3419 |
FBase.DoAfterEdit(self);
|
3420 |
end;
|
3421 |
|
3422 |
procedure TIBCustomDataSet.DoBeforeInsert;
|
3423 |
begin
|
3424 |
if not CanInsert then
|
3425 |
IBError(ibxeCannotInsert, [nil]);
|
3426 |
inherited DoBeforeInsert;
|
3427 |
end;
|
3428 |
|
3429 |
procedure TIBCustomDataSet.DoAfterInsert;
|
3430 |
begin
|
3431 |
if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
|
3432 |
GeneratorField.Apply;
|
3433 |
inherited DoAfterInsert;
|
3434 |
FBase.DoAfterInsert(self);
|
3435 |
end;
|
3436 |
|
3437 |
procedure TIBCustomDataSet.DoBeforeClose;
|
3438 |
begin
|
3439 |
inherited DoBeforeClose;
|
3440 |
if FInTransactionEnd and (FCloseAction = TARollback) then
|
3441 |
Exit;
|
3442 |
if State in [dsInsert,dsEdit] then
|
3443 |
begin
|
3444 |
if DataSetCloseAction = dcSaveChanges then
|
3445 |
Post;
|
3446 |
{Note this can fail with an exception e.g. due to
|
3447 |
database validation error. In which case the dataset remains open }
|
3448 |
end;
|
3449 |
if FCachedUpdates and FUpdatesPending and (DataSetCloseAction = dcSaveChanges) then
|
3450 |
ApplyUpdates;
|
3451 |
end;
|
3452 |
|
3453 |
procedure TIBCustomDataSet.DoBeforeOpen;
|
3454 |
var i: integer;
|
3455 |
begin
|
3456 |
if assigned(FParser) then
|
3457 |
FParser.Reset;
|
3458 |
for i := 0 to FIBLinks.Count - 1 do
|
3459 |
TIBControlLink(FIBLinks[i]).UpdateSQL(self);
|
3460 |
inherited DoBeforeOpen;
|
3461 |
for i := 0 to FIBLinks.Count - 1 do
|
3462 |
TIBControlLink(FIBLinks[i]).UpdateParams(self);
|
3463 |
end;
|
3464 |
|
3465 |
procedure TIBCustomDataSet.DoBeforePost;
|
3466 |
begin
|
3467 |
inherited DoBeforePost;
|
3468 |
if (State = dsInsert) and
|
3469 |
(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
|
3470 |
GeneratorField.Apply
|
3471 |
end;
|
3472 |
|
3473 |
procedure TIBCustomDataSet.DoAfterPost;
|
3474 |
begin
|
3475 |
inherited DoAfterPost;
|
3476 |
FBase.DoAfterPost(self);
|
3477 |
InternalAutoCommit;
|
3478 |
end;
|
3479 |
|
3480 |
procedure TIBCustomDataSet.FetchAll;
|
3481 |
var
|
3482 |
CurBookmark: TBookmark;
|
3483 |
begin
|
3484 |
FBase.SetCursor;
|
3485 |
try
|
3486 |
if FQSelect.EOF or not FQSelect.Open then
|
3487 |
exit;
|
3488 |
DisableControls;
|
3489 |
try
|
3490 |
CurBookmark := Bookmark;
|
3491 |
Last;
|
3492 |
Bookmark := CurBookmark;
|
3493 |
finally
|
3494 |
EnableControls;
|
3495 |
end;
|
3496 |
finally
|
3497 |
FBase.RestoreCursor;
|
3498 |
end;
|
3499 |
end;
|
3500 |
|
3501 |
procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
|
3502 |
begin
|
3503 |
FreeMem(Buffer);
|
3504 |
Buffer := nil;
|
3505 |
end;
|
3506 |
|
3507 |
procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
|
3508 |
begin
|
3509 |
Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
|
3510 |
end;
|
3511 |
|
3512 |
function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
|
3513 |
begin
|
3514 |
result := PRecordData(Buffer)^.rdBookmarkFlag;
|
3515 |
end;
|
3516 |
|
3517 |
function TIBCustomDataSet.GetCanModify: Boolean;
|
3518 |
begin
|
3519 |
result := (FQInsert.SQL.Text <> '') or
|
3520 |
(FQModify.SQL.Text <> '') or
|
3521 |
(FQDelete.SQL.Text <> '') or
|
3522 |
(Assigned(FUpdateObject));
|
3523 |
end;
|
3524 |
|
3525 |
function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
|
3526 |
begin
|
3527 |
if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
|
3528 |
begin
|
3529 |
UpdateCursorPos;
|
3530 |
ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
|
3531 |
result := True;
|
3532 |
end
|
3533 |
else
|
3534 |
result := False;
|
3535 |
end;
|
3536 |
|
3537 |
function TIBCustomDataSet.GetDataSource: TDataSource;
|
3538 |
begin
|
3539 |
if FDataLink = nil then
|
3540 |
result := nil
|
3541 |
else
|
3542 |
result := FDataLink.DataSource;
|
3543 |
end;
|
3544 |
|
3545 |
function TIBCustomDataSet.GetDBAliasName(FieldNo: integer): string;
|
3546 |
begin
|
3547 |
Result := FAliasNameMap[FieldNo-1]
|
3548 |
end;
|
3549 |
|
3550 |
function TIBCustomDataSet.GetFieldDefFromAlias(aliasName: string): TFieldDef;
|
3551 |
var
|
3552 |
i: integer;
|
3553 |
begin
|
3554 |
Result := nil;
|
3555 |
for i := 0 to Length(FAliasNameMap) - 1 do
|
3556 |
if FAliasNameMap[i] = aliasName then
|
3557 |
begin
|
3558 |
Result := FieldDefs[i];
|
3559 |
Exit
|
3560 |
end;
|
3561 |
end;
|
3562 |
|
3563 |
function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
|
3564 |
begin
|
3565 |
Result := DefaultFieldClasses[FieldType];
|
3566 |
end;
|
3567 |
|
3568 |
function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
|
3569 |
begin
|
3570 |
result := GetFieldData(FieldByNumber(FieldNo), buffer);
|
3571 |
end;
|
3572 |
|
3573 |
function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
|
3574 |
var
|
3575 |
Buff, Data: PChar;
|
3576 |
CurrentRecord: PRecordData;
|
3577 |
begin
|
3578 |
result := False;
|
3579 |
Buff := GetActiveBuf;
|
3580 |
if (Buff = nil) or
|
3581 |
(not IsVisible(Buff)) or not assigned(Field.DataSet) then
|
3582 |
exit;
|
3583 |
{ The intention here is to stuff the buffer with the data for the
|
3584 |
referenced field for the current record }
|
3585 |
CurrentRecord := PRecordData(Buff);
|
3586 |
if (Field.FieldNo < 0) then
|
3587 |
begin
|
3588 |
Inc(Buff, FRecordSize + Field.Offset);
|
3589 |
result := Boolean(Buff[0]);
|
3590 |
if result and (Buffer <> nil) then
|
3591 |
Move(Buff[1], Buffer^, Field.DataSize);
|
3592 |
end
|
3593 |
else
|
3594 |
if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
|
3595 |
(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
|
3596 |
with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]],
|
3597 |
FFieldColumns^[FMappedFieldPosition[Field.FieldNo - 1]] do
|
3598 |
begin
|
3599 |
result := not fdIsNull;
|
3600 |
if result and (Buffer <> nil) then
|
3601 |
begin
|
3602 |
Data := Buff + fdDataOfs;
|
3603 |
if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
|
3604 |
begin
|
3605 |
if fdDataLength < Field.DataSize then
|
3606 |
begin
|
3607 |
Move(Data^, Buffer^, fdDataLength);
|
3608 |
PChar(Buffer)[fdDataLength] := #0;
|
3609 |
end
|
3610 |
else
|
3611 |
IBError(ibxeFieldSizeError,[Field.FieldName])
|
3612 |
end
|
3613 |
else
|
3614 |
Move(Data^, Buffer^, Field.DataSize);
|
3615 |
end;
|
3616 |
end;
|
3617 |
end;
|
3618 |
|
3619 |
{ GetRecNo and SetRecNo both operate off of 1-based indexes as
|
3620 |
opposed to 0-based indexes.
|
3621 |
This is because we want LastRecordNumber/RecordCount = 1 }
|
3622 |
|
3623 |
function TIBCustomDataSet.GetRecNo: Integer;
|
3624 |
begin
|
3625 |
if GetActiveBuf = nil then
|
3626 |
result := 0
|
3627 |
else
|
3628 |
result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
|
3629 |
end;
|
3630 |
|
3631 |
function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
|
3632 |
DoCheck: Boolean): TGetResult;
|
3633 |
var
|
3634 |
Accept: Boolean;
|
3635 |
SaveState: TDataSetState;
|
3636 |
begin
|
3637 |
Result := grOK;
|
3638 |
if Filtered and Assigned(OnFilterRecord) then
|
3639 |
begin
|
3640 |
Accept := False;
|
3641 |
SaveState := SetTempState(dsFilter);
|
3642 |
while not Accept do
|
3643 |
begin
|
3644 |
Result := InternalGetRecord(Buffer, GetMode, DoCheck);
|
3645 |
if Result <> grOK then
|
3646 |
break;
|
3647 |
FFilterBuffer := Buffer;
|
3648 |
try
|
3649 |
Accept := True;
|
3650 |
OnFilterRecord(Self, Accept);
|
3651 |
if not Accept and (GetMode = gmCurrent) then
|
3652 |
GetMode := gmPrior;
|
3653 |
except
|
3654 |
// FBase.HandleException(Self);
|
3655 |
end;
|
3656 |
end;
|
3657 |
RestoreState(SaveState);
|
3658 |
end
|
3659 |
else
|
3660 |
Result := InternalGetRecord(Buffer, GetMode, DoCheck);
|
3661 |
end;
|
3662 |
|
3663 |
function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
|
3664 |
DoCheck: Boolean): TGetResult;
|
3665 |
begin
|
3666 |
result := grError;
|
3667 |
case GetMode of
|
3668 |
gmCurrent: begin
|
3669 |
if (FCurrentRecord >= 0) then begin
|
3670 |
if FCurrentRecord < FRecordCount then
|
3671 |
ReadRecordCache(FCurrentRecord, Buffer, False)
|
3672 |
else begin
|
3673 |
while (not FQSelect.EOF) and FQSelect.Next and
|
3674 |
(FCurrentRecord >= FRecordCount) do begin
|
3675 |
FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
|
3676 |
Inc(FRecordCount);
|
3677 |
end;
|
3678 |
FCurrentRecord := FRecordCount - 1;
|
3679 |
if (FCurrentRecord >= 0) then
|
3680 |
ReadRecordCache(FCurrentRecord, Buffer, False);
|
3681 |
end;
|
3682 |
result := grOk;
|
3683 |
end else
|
3684 |
result := grBOF;
|
3685 |
end;
|
3686 |
gmNext: begin
|
3687 |
result := grOk;
|
3688 |
if FCurrentRecord = FRecordCount then
|
3689 |
result := grEOF
|
3690 |
else if FCurrentRecord = FRecordCount - 1 then begin
|
3691 |
if (not FQSelect.EOF) then begin
|
3692 |
FQSelect.Next;
|
3693 |
Inc(FCurrentRecord);
|
3694 |
end;
|
3695 |
if (FQSelect.EOF) then begin
|
3696 |
result := grEOF;
|
3697 |
end else begin
|
3698 |
Inc(FRecordCount);
|
3699 |
FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
|
3700 |
end;
|
3701 |
end else if (FCurrentRecord < FRecordCount) then begin
|
3702 |
Inc(FCurrentRecord);
|
3703 |
ReadRecordCache(FCurrentRecord, Buffer, False);
|
3704 |
end;
|
3705 |
end;
|
3706 |
else { gmPrior }
|
3707 |
begin
|
3708 |
if (FCurrentRecord = 0) then begin
|
3709 |
Dec(FCurrentRecord);
|
3710 |
result := grBOF;
|
3711 |
end else if (FCurrentRecord > 0) and
|
3712 |
(FCurrentRecord <= FRecordCount) then begin
|
3713 |
Dec(FCurrentRecord);
|
3714 |
ReadRecordCache(FCurrentRecord, Buffer, False);
|
3715 |
result := grOk;
|
3716 |
end else if (FCurrentRecord = -1) then
|
3717 |
result := grBOF;
|
3718 |
end;
|
3719 |
end;
|
3720 |
if result = grOk then
|
3721 |
result := AdjustCurrentRecord(Buffer, GetMode);
|
3722 |
if result = grOk then with PRecordData(Buffer)^ do begin
|
3723 |
rdBookmarkFlag := bfCurrent;
|
3724 |
GetCalcFields(Buffer);
|
3725 |
end else if (result = grEOF) then begin
|
3726 |
CopyRecordBuffer(FModelBuffer, Buffer);
|
3727 |
PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
|
3728 |
end else if (result = grBOF) then begin
|
3729 |
CopyRecordBuffer(FModelBuffer, Buffer);
|
3730 |
PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
|
3731 |
end else if (result = grError) then begin
|
3732 |
CopyRecordBuffer(FModelBuffer, Buffer);
|
3733 |
PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
|
3734 |
end;;
|
3735 |
end;
|
3736 |
|
3737 |
function TIBCustomDataSet.GetRecordCount: Integer;
|
3738 |
begin
|
3739 |
result := FRecordCount - FDeletedRecords;
|
3740 |
end;
|
3741 |
|
3742 |
function TIBCustomDataSet.GetRecordSize: Word;
|
3743 |
begin
|
3744 |
result := FRecordBufferSize;
|
3745 |
end;
|
3746 |
|
3747 |
procedure TIBCustomDataSet.InternalAutoCommit;
|
3748 |
begin
|
3749 |
with Transaction do
|
3750 |
if InTransaction and (FAutoCommit = acCommitRetaining) then
|
3751 |
begin
|
3752 |
if CachedUpdates then ApplyUpdates;
|
3753 |
CommitRetaining;
|
3754 |
end;
|
3755 |
end;
|
3756 |
|
3757 |
procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
|
3758 |
begin
|
3759 |
CheckEditState;
|
3760 |
begin
|
3761 |
{ When adding records, we *always* append.
|
3762 |
Insertion is just too costly }
|
3763 |
AdjustRecordOnInsert(Buffer);
|
3764 |
with PRecordData(Buffer)^ do
|
3765 |
begin
|
3766 |
rdUpdateStatus := usInserted;
|
3767 |
rdCachedUpdateStatus := cusInserted;
|
3768 |
end;
|
3769 |
if not CachedUpdates then
|
3770 |
InternalPostRecord(FQInsert, Buffer)
|
3771 |
else begin
|
3772 |
WriteRecordCache(FCurrentRecord, Buffer);
|
3773 |
FUpdatesPending := True;
|
3774 |
end;
|
3775 |
Inc(FRecordCount);
|
3776 |
InternalSetToRecord(Buffer);
|
3777 |
end
|
3778 |
end;
|
3779 |
|
3780 |
procedure TIBCustomDataSet.InternalCancel;
|
3781 |
var
|
3782 |
Buff: PChar;
|
3783 |
CurRec: Integer;
|
3784 |
pda: PArrayDataArray;
|
3785 |
i: integer;
|
3786 |
begin
|
3787 |
inherited InternalCancel;
|
3788 |
Buff := GetActiveBuf;
|
3789 |
if Buff <> nil then
|
3790 |
begin
|
3791 |
pda := PArrayDataArray(Buff + FArrayCacheOffset);
|
3792 |
for i := 0 to ArrayFieldCount - 1 do
|
3793 |
pda^[i].ArrayIntf.CancelChanges;
|
3794 |
CurRec := FCurrentRecord;
|
3795 |
AdjustRecordOnInsert(Buff);
|
3796 |
if (State = dsEdit) then begin
|
3797 |
CopyRecordBuffer(FOldBuffer, Buff);
|
3798 |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
|
3799 |
end else begin
|
3800 |
CopyRecordBuffer(FModelBuffer, Buff);
|
3801 |
PRecordData(Buff)^.rdUpdateStatus := usDeleted;
|
3802 |
PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
|
3803 |
PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
|
3804 |
FCurrentRecord := CurRec;
|
3805 |
end;
|
3806 |
end;
|
3807 |
end;
|
3808 |
|
3809 |
|
3810 |
procedure TIBCustomDataSet.InternalClose;
|
3811 |
begin
|
3812 |
if FDidActivate then
|
3813 |
DeactivateTransaction;
|
3814 |
FQSelect.Close;
|
3815 |
ClearBlobCache;
|
3816 |
ClearArrayCache;
|
3817 |
FreeRecordBuffer(FModelBuffer);
|
3818 |
FreeRecordBuffer(FOldBuffer);
|
3819 |
FCurrentRecord := -1;
|
3820 |
FOpen := False;
|
3821 |
FRecordCount := 0;
|
3822 |
FDeletedRecords := 0;
|
3823 |
FRecordSize := 0;
|
3824 |
FBPos := 0;
|
3825 |
FOBPos := 0;
|
3826 |
FCacheSize := 0;
|
3827 |
FOldCacheSize := 0;
|
3828 |
FBEnd := 0;
|
3829 |
FOBEnd := 0;
|
3830 |
FreeMem(FBufferCache);
|
3831 |
FBufferCache := nil;
|
3832 |
FreeMem(FFieldColumns);
|
3833 |
FFieldColumns := nil;
|
3834 |
FreeMem(FOldBufferCache);
|
3835 |
FOldBufferCache := nil;
|
3836 |
BindFields(False);
|
3837 |
ResetParser;
|
3838 |
if DefaultFields then DestroyFields;
|
3839 |
end;
|
3840 |
|
3841 |
procedure TIBCustomDataSet.InternalDelete;
|
3842 |
var
|
3843 |
Buff: PChar;
|
3844 |
begin
|
3845 |
FBase.SetCursor;
|
3846 |
try
|
3847 |
Buff := GetActiveBuf;
|
3848 |
if CanDelete then
|
3849 |
begin
|
3850 |
if not CachedUpdates then
|
3851 |
InternalDeleteRecord(FQDelete, Buff)
|
3852 |
else
|
3853 |
begin
|
3854 |
with PRecordData(Buff)^ do
|
3855 |
begin
|
3856 |
if rdCachedUpdateStatus = cusInserted then
|
3857 |
rdCachedUpdateStatus := cusUninserted
|
3858 |
else begin
|
3859 |
rdUpdateStatus := usDeleted;
|
3860 |
rdCachedUpdateStatus := cusDeleted;
|
3861 |
end;
|
3862 |
end;
|
3863 |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
|
3864 |
end;
|
3865 |
Inc(FDeletedRecords);
|
3866 |
FUpdatesPending := True;
|
3867 |
end else
|
3868 |
IBError(ibxeCannotDelete, [nil]);
|
3869 |
finally
|
3870 |
FBase.RestoreCursor;
|
3871 |
end;
|
3872 |
end;
|
3873 |
|
3874 |
procedure TIBCustomDataSet.InternalFirst;
|
3875 |
begin
|
3876 |
FCurrentRecord := -1;
|
3877 |
end;
|
3878 |
|
3879 |
procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
|
3880 |
begin
|
3881 |
FCurrentRecord := PInteger(Bookmark)^;
|
3882 |
end;
|
3883 |
|
3884 |
procedure TIBCustomDataSet.InternalHandleException;
|
3885 |
begin
|
3886 |
FBase.HandleException(Self)
|
3887 |
end;
|
3888 |
|
3889 |
procedure TIBCustomDataSet.InternalInitFieldDefs;
|
3890 |
begin
|
3891 |
if not InternalPrepared then
|
3892 |
begin
|
3893 |
InternalPrepare;
|
3894 |
exit;
|
3895 |
end;
|
3896 |
FieldDefsFromQuery(FQSelect);
|
3897 |
end;
|
3898 |
|
3899 |
procedure TIBCustomDataSet.FieldDefsFromQuery(SourceQuery: TIBSQL);
|
3900 |
const
|
3901 |
DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
|
3902 |
'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
|
3903 |
'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
|
3904 |
'where R.RDB$RELATION_NAME = :RELATION ' + {do not localize}
|
3905 |
'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
|
3906 |
'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
|
3907 |
' (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
|
3908 |
|
3909 |
DefaultSQLODS12 = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
|
3910 |
'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME, R.RDB$IDENTITY_TYPE ' + {do not localize}
|
3911 |
'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
|
3912 |
'where R.RDB$RELATION_NAME = :RELATION ' + {do not localize}
|
3913 |
'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
|
3914 |
'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
|
3915 |
' (not F.RDB$DEFAULT_VALUE is NULL) or ' + {do not localize}
|
3916 |
' ( not R.RDB$IDENTITY_TYPE is NULL))' ; {do not localize}
|
3917 |
|
3918 |
var
|
3919 |
FieldType: TFieldType;
|
3920 |
FieldSize: Word;
|
3921 |
FieldDataSize: integer;
|
3922 |
CharSetSize: integer;
|
3923 |
CharSetName: RawByteString;
|
3924 |
FieldCodePage: TSystemCodePage;
|
3925 |
FieldNullable : Boolean;
|
3926 |
i, FieldPosition, FieldPrecision: Integer;
|
3927 |
FieldAliasName, DBAliasName: string;
|
3928 |
aRelationName, FieldName: string;
|
3929 |
Query : TIBSQL;
|
3930 |
FieldIndex: Integer;
|
3931 |
FRelationNodes : TRelationNode;
|
3932 |
aArrayDimensions: integer;
|
3933 |
aArrayBounds: TArrayBounds;
|
3934 |
ArrayMetaData: IArrayMetaData;
|
3935 |
|
3936 |
function Add_Node(Relation, Field : String) : TRelationNode;
|
3937 |
var
|
3938 |
FField : TFieldNode;
|
3939 |
begin
|
3940 |
if FRelationNodes.RelationName = '' then
|
3941 |
Result := FRelationNodes
|
3942 |
else
|
3943 |
begin
|
3944 |
Result := TRelationNode.Create;
|
3945 |
Result.NextRelation := FRelationNodes;
|
3946 |
end;
|
3947 |
Result.RelationName := Relation;
|
3948 |
FRelationNodes := Result;
|
3949 |
Query.Params[0].AsString := Relation;
|
3950 |
Query.ExecQuery;
|
3951 |
while not Query.Eof do
|
3952 |
begin
|
3953 |
FField := TFieldNode.Create;
|
3954 |
FField.FieldName := Query.Fields[2].AsString;
|
3955 |
FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
|
3956 |
FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
|
3957 |
FField.IDENTITY_COLUMN := (Query.FieldCount > 3) and not Query.Fields[3].IsNull;
|
3958 |
FField.NextField := Result.FieldNodes;
|
3959 |
Result.FieldNodes := FField;
|
3960 |
Query.Next;
|
3961 |
end;
|
3962 |
Query.Close;
|
3963 |
end;
|
3964 |
|
3965 |
function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
|
3966 |
var
|
3967 |
FRelation : TRelationNode;
|
3968 |
FField : TFieldNode;
|
3969 |
begin
|
3970 |
FRelation := FRelationNodes;
|
3971 |
while Assigned(FRelation) and
|
3972 |
(FRelation.RelationName <> Relation) do
|
3973 |
FRelation := FRelation.NextRelation;
|
3974 |
if not Assigned(FRelation) then
|
3975 |
FRelation := Add_Node(Relation, Field);
|
3976 |
Result := false;
|
3977 |
FField := FRelation.FieldNodes;
|
3978 |
while Assigned(FField) do
|
3979 |
if FField.FieldName = Field then
|
3980 |
begin
|
3981 |
Result := Ffield.COMPUTED_BLR;
|
3982 |
Exit;
|
3983 |
end
|
3984 |
else
|
3985 |
FField := Ffield.NextField;
|
3986 |
end;
|
3987 |
|
3988 |
function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
|
3989 |
var
|
3990 |
FRelation : TRelationNode;
|
3991 |
FField : TFieldNode;
|
3992 |
begin
|
3993 |
FRelation := FRelationNodes;
|
3994 |
while Assigned(FRelation) and
|
3995 |
(FRelation.RelationName <> Relation) do
|
3996 |
FRelation := FRelation.NextRelation;
|
3997 |
if not Assigned(FRelation) then
|
3998 |
FRelation := Add_Node(Relation, Field);
|
3999 |
Result := false;
|
4000 |
FField := FRelation.FieldNodes;
|
4001 |
while Assigned(FField) do
|
4002 |
if FField.FieldName = Field then
|
4003 |
begin
|
4004 |
Result := Ffield.DEFAULT_VALUE;
|
4005 |
Exit;
|
4006 |
end
|
4007 |
else
|
4008 |
FField := Ffield.NextField;
|
4009 |
end;
|
4010 |
|
4011 |
function Is_IDENTITY_COLUMN(Relation, Field : String) : Boolean;
|
4012 |
var
|
4013 |
FRelation : TRelationNode;
|
4014 |
FField : TFieldNode;
|
4015 |
begin
|
4016 |
FRelation := FRelationNodes;
|
4017 |
while Assigned(FRelation) and
|
4018 |
(FRelation.RelationName <> Relation) do
|
4019 |
FRelation := FRelation.NextRelation;
|
4020 |
if not Assigned(FRelation) then
|
4021 |
FRelation := Add_Node(Relation, Field);
|
4022 |
Result := false;
|
4023 |
FField := FRelation.FieldNodes;
|
4024 |
while Assigned(FField) do
|
4025 |
if FField.FieldName = Field then
|
4026 |
begin
|
4027 |
Result := Ffield.IDENTITY_COLUMN;
|
4028 |
Exit;
|
4029 |
end
|
4030 |
else
|
4031 |
FField := Ffield.NextField;
|
4032 |
end;
|
4033 |
|
4034 |
Procedure FreeNodes;
|
4035 |
var
|
4036 |
FRelation : TRelationNode;
|
4037 |
FField : TFieldNode;
|
4038 |
begin
|
4039 |
while Assigned(FRelationNodes) do
|
4040 |
begin
|
4041 |
While Assigned(FRelationNodes.FieldNodes) do
|
4042 |
begin
|
4043 |
FField := FRelationNodes.FieldNodes.NextField;
|
4044 |
FRelationNodes.FieldNodes.Free;
|
4045 |
FRelationNodes.FieldNodes := FField;
|
4046 |
end;
|
4047 |
FRelation := FRelationNodes.NextRelation;
|
4048 |
FRelationNodes.Free;
|
4049 |
FRelationNodes := FRelation;
|
4050 |
end;
|
4051 |
end;
|
4052 |
|
4053 |
begin
|
4054 |
FRelationNodes := TRelationNode.Create;
|
4055 |
FNeedsRefresh := False;
|
4056 |
if not Database.InternalTransaction.InTransaction then
|
4057 |
Database.InternalTransaction.StartTransaction;
|
4058 |
Query := TIBSQL.Create(self);
|
4059 |
try
|
4060 |
Query.Database := DataBase;
|
4061 |
Query.Transaction := Database.InternalTransaction;
|
4062 |
FieldDefs.BeginUpdate;
|
4063 |
FieldDefs.Clear;
|
4064 |
FieldIndex := 0;
|
4065 |
if (Length(FMappedFieldPosition) < SourceQuery.MetaData.Count) then
|
4066 |
SetLength(FMappedFieldPosition, SourceQuery.MetaData.Count);
|
4067 |
if FDatabaseInfo.ODSMajorVersion >= 12 then
|
4068 |
Query.SQL.Text := DefaultSQLODS12
|
4069 |
else
|
4070 |
Query.SQL.Text := DefaultSQL;
|
4071 |
Query.Prepare;
|
4072 |
SetLength(FAliasNameMap, SourceQuery.MetaData.Count);
|
4073 |
SetLength(FAliasNameList, SourceQuery.MetaData.Count);
|
4074 |
for i := 0 to SourceQuery.MetaData.GetCount - 1 do
|
4075 |
with SourceQuery.MetaData[i] do
|
4076 |
begin
|
4077 |
{ Get the field name }
|
4078 |
FieldAliasName := GetName;
|
4079 |
DBAliasName := GetAliasname;
|
4080 |
aRelationName := getRelationName;
|
4081 |
FieldName := getSQLName;
|
4082 |
FAliasNameList[i] := DBAliasName;
|
4083 |
FieldSize := 0;
|
4084 |
FieldDataSize := GetSize;
|
4085 |
FieldPrecision := 0;
|
4086 |
FieldNullable := IsNullable;
|
4087 |
CharSetSize := 0;
|
4088 |
CharSetName := '';
|
4089 |
FieldCodePage := CP_NONE;
|
4090 |
aArrayDimensions := 0;
|
4091 |
SetLength(aArrayBounds,0);
|
4092 |
case SQLType of
|
4093 |
{ All VARCHAR's must be converted to strings before recording
|
4094 |
their values }
|
4095 |
SQL_VARYING, SQL_TEXT:
|
4096 |
begin
|
4097 |
if not Database.Attachment.CharSetWidth(getCharSetID,CharSetSize) then
|
4098 |
CharSetSize := 1;
|
4099 |
CharSetName := Database.Attachment.GetCharsetName(getCharSetID);
|
4100 |
Database.Attachment.CharSetID2CodePage(getCharSetID,FieldCodePage);
|
4101 |
FieldSize := FieldDataSize div CharSetSize;
|
4102 |
FieldType := ftString;
|
4103 |
end;
|
4104 |
{ All Doubles/Floats should be cast to doubles }
|
4105 |
SQL_DOUBLE, SQL_FLOAT:
|
4106 |
FieldType := ftFloat;
|
4107 |
SQL_SHORT:
|
4108 |
begin
|
4109 |
if (getScale = 0) then
|
4110 |
FieldType := ftSmallInt
|
4111 |
else begin
|
4112 |
FieldType := ftBCD;
|
4113 |
FieldPrecision := 4;
|
4114 |
FieldSize := -getScale;
|
4115 |
end;
|
4116 |
end;
|
4117 |
SQL_LONG:
|
4118 |
begin
|
4119 |
if (getScale = 0) then
|
4120 |
FieldType := ftInteger
|
4121 |
else if (getScale >= (-4)) then
|
4122 |
begin
|
4123 |
FieldType := ftBCD;
|
4124 |
FieldPrecision := 9;
|
4125 |
FieldSize := -getScale;
|
4126 |
end
|
4127 |
else
|
4128 |
if Database.SQLDialect = 1 then
|
4129 |
FieldType := ftFloat
|
4130 |
else
|
4131 |
if (FieldCount > i) and (Fields[i] is TFloatField) then
|
4132 |
FieldType := ftFloat
|
4133 |
else
|
4134 |
begin
|
4135 |
FieldType := ftFMTBCD;
|
4136 |
FieldPrecision := 9;
|
4137 |
FieldSize := -getScale;
|
4138 |
end;
|
4139 |
end;
|
4140 |
|
4141 |
SQL_INT64:
|
4142 |
begin
|
4143 |
if (getScale = 0) then
|
4144 |
FieldType := ftLargeInt
|
4145 |
else if (getScale >= (-4)) then
|
4146 |
begin
|
4147 |
FieldType := ftBCD;
|
4148 |
FieldPrecision := 18;
|
4149 |
FieldSize := -getScale;
|
4150 |
end
|
4151 |
else
|
4152 |
FieldType := ftFloat;
|
4153 |
end;
|
4154 |
SQL_TIMESTAMP: FieldType := ftDateTime;
|
4155 |
SQL_TYPE_TIME: FieldType := ftTime;
|
4156 |
SQL_TYPE_DATE: FieldType := ftDate;
|
4157 |
SQL_BLOB:
|
4158 |
begin
|
4159 |
FieldSize := sizeof (TISC_QUAD);
|
4160 |
if (getSubtype = 1) then
|
4161 |
begin
|
4162 |
if not Database.Attachment.CharSetWidth(getCharSetID,CharSetSize) then
|
4163 |
CharSetSize := 1;
|
4164 |
CharSetName := Database.Attachment.GetCharsetName(getCharSetID);
|
4165 |
Database.Attachment.CharSetID2CodePage(getCharSetID,FieldCodePage);
|
4166 |
FieldType := ftMemo;
|
4167 |
end
|
4168 |
else
|
4169 |
FieldType := ftBlob;
|
4170 |
end;
|
4171 |
SQL_ARRAY:
|
4172 |
begin
|
4173 |
FieldSize := sizeof (TISC_QUAD);
|
4174 |
FieldType := ftArray;
|
4175 |
ArrayMetaData := GetArrayMetaData;
|
4176 |
if ArrayMetaData <> nil then
|
4177 |
begin
|
4178 |
aArrayDimensions := ArrayMetaData.GetDimensions;
|
4179 |
aArrayBounds := ArrayMetaData.GetBounds;
|
4180 |
end;
|
4181 |
end;
|
4182 |
SQL_BOOLEAN:
|
4183 |
FieldType:= ftBoolean;
|
4184 |
else
|
4185 |
FieldType := ftUnknown;
|
4186 |
end;
|
4187 |
FieldPosition := i + 1;
|
4188 |
if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
|
4189 |
begin
|
4190 |
FMappedFieldPosition[FieldIndex] := FieldPosition;
|
4191 |
Inc(FieldIndex);
|
4192 |
with TIBFieldDef.Create(FieldDefs,'',FieldType,0,False,FieldDefs.Count+1) do
|
4193 |
begin
|
4194 |
Name := FieldAliasName;
|
4195 |
FAliasNameMap[FieldNo-1] := DBAliasName;
|
4196 |
Size := FieldSize;
|
4197 |
DataSize := FieldDataSize;
|
4198 |
Precision := FieldPrecision;
|
4199 |
Required := not FieldNullable;
|
4200 |
RelationName := aRelationName;
|
4201 |
InternalCalcField := False;
|
4202 |
CharacterSetSize := CharSetSize;
|
4203 |
CharacterSetName := CharSetName;
|
4204 |
CodePage := FieldCodePage;
|
4205 |
ArrayDimensions := aArrayDimensions;
|
4206 |
ArrayBounds := aArrayBounds;
|
4207 |
if (FieldName <> '') and (RelationName <> '') then
|
4208 |
begin
|
4209 |
IdentityColumn := Is_IDENTITY_COLUMN(RelationName, FieldName);
|
4210 |
if Has_COMPUTED_BLR(RelationName, FieldName) then
|
4211 |
begin
|
4212 |
Attributes := [faReadOnly];
|
4213 |
InternalCalcField := True;
|
4214 |
FNeedsRefresh := True;
|
4215 |
end
|
4216 |
else
|
4217 |
begin
|
4218 |
if Has_DEFAULT_VALUE(RelationName, FieldName) then
|
4219 |
begin
|
4220 |
if not FieldNullable then
|
4221 |
Attributes := [faRequired];
|
4222 |
end
|
4223 |
else
|
4224 |
FNeedsRefresh := True;
|
4225 |
end;
|
4226 |
end;
|
4227 |
end;
|
4228 |
end;
|
4229 |
end;
|
4230 |
finally
|
4231 |
Query.free;
|
4232 |
FreeNodes;
|
4233 |
Database.InternalTransaction.Commit;
|
4234 |
FieldDefs.EndUpdate;
|
4235 |
FieldDefs.Updated := true;
|
4236 |
end;
|
4237 |
end;
|
4238 |
|
4239 |
procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
|
4240 |
begin
|
4241 |
CopyRecordBuffer(FModelBuffer, Buffer);
|
4242 |
end;
|
4243 |
|
4244 |
procedure TIBCustomDataSet.InternalLast;
|
4245 |
var
|
4246 |
Buffer: PChar;
|
4247 |
begin
|
4248 |
if (FQSelect.EOF) then
|
4249 |
FCurrentRecord := FRecordCount
|
4250 |
else begin
|
4251 |
Buffer := AllocRecordBuffer;
|
4252 |
try
|
4253 |
while FQSelect.Next do
|
4254 |
begin
|
4255 |
FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
|
4256 |
Inc(FRecordCount);
|
4257 |
end;
|
4258 |
FCurrentRecord := FRecordCount;
|
4259 |
finally
|
4260 |
FreeRecordBuffer(Buffer);
|
4261 |
end;
|
4262 |
end;
|
4263 |
end;
|
4264 |
|
4265 |
procedure TIBCustomDataSet.InternalSetParamsFromCursor;
|
4266 |
var
|
4267 |
i: Integer;
|
4268 |
cur_param: ISQLParam;
|
4269 |
cur_field: TField;
|
4270 |
s: TStream;
|
4271 |
begin
|
4272 |
if FQSelect.SQL.Text = '' then
|
4273 |
IBError(ibxeEmptyQuery, [nil]);
|
4274 |
if not FInternalPrepared then
|
4275 |
InternalPrepare;
|
4276 |
if (SQLParams.GetCount > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
|
4277 |
begin
|
4278 |
for i := 0 to SQLParams.GetCount - 1 do
|
4279 |
begin
|
4280 |
cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
|
4281 |
if (cur_field <> nil) then
|
4282 |
begin
|
4283 |
cur_param := SQLParams[i];
|
4284 |
if (cur_field.IsNull) then
|
4285 |
cur_param.IsNull := True
|
4286 |
else
|
4287 |
case cur_field.DataType of
|
4288 |
ftString:
|
4289 |
cur_param.AsString := cur_field.AsString;
|
4290 |
ftBoolean:
|
4291 |
cur_param.AsBoolean := cur_field.AsBoolean;
|
4292 |
ftSmallint, ftWord:
|
4293 |
cur_param.AsShort := cur_field.AsInteger;
|
4294 |
ftInteger:
|
4295 |
cur_param.AsLong := cur_field.AsInteger;
|
4296 |
ftLargeInt:
|
4297 |
cur_param.AsInt64 := cur_field.AsLargeInt;
|
4298 |
ftFloat, ftCurrency:
|
4299 |
cur_param.AsDouble := cur_field.AsFloat;
|
4300 |
ftBCD:
|
4301 |
cur_param.AsCurrency := cur_field.AsCurrency;
|
4302 |
ftDate:
|
4303 |
cur_param.AsDate := cur_field.AsDateTime;
|
4304 |
ftTime:
|
4305 |
cur_param.AsTime := cur_field.AsDateTime;
|
4306 |
ftDateTime:
|
4307 |
cur_param.AsDateTime := cur_field.AsDateTime;
|
4308 |
ftBlob, ftMemo:
|
4309 |
begin
|
4310 |
s := nil;
|
4311 |
try
|
4312 |
s := DataSource.DataSet.
|
4313 |
CreateBlobStream(cur_field, bmRead);
|
4314 |
cur_param.AsBlob := TIBDSBlobStream(s).FBlobStream.Blob;
|
4315 |
finally
|
4316 |
s.free;
|
4317 |
end;
|
4318 |
end;
|
4319 |
ftArray:
|
4320 |
cur_param.AsArray := TIBArrayField(cur_field).ArrayIntf;
|
4321 |
else
|
4322 |
IBError(ibxeNotSupported, [nil]);
|
4323 |
end;
|
4324 |
end;
|
4325 |
end;
|
4326 |
end;
|
4327 |
end;
|
4328 |
|
4329 |
procedure TIBCustomDataSet.ReQuery;
|
4330 |
begin
|
4331 |
FQSelect.Close;
|
4332 |
ClearBlobCache;
|
4333 |
FCurrentRecord := -1;
|
4334 |
FRecordCount := 0;
|
4335 |
FDeletedRecords := 0;
|
4336 |
FBPos := 0;
|
4337 |
FOBPos := 0;
|
4338 |
FBEnd := 0;
|
4339 |
FOBEnd := 0;
|
4340 |
FQSelect.Close;
|
4341 |
FQSelect.ExecQuery;
|
4342 |
FOpen := FQSelect.Open;
|
4343 |
First;
|
4344 |
end;
|
4345 |
|
4346 |
procedure TIBCustomDataSet.InternalOpen;
|
4347 |
|
4348 |
function RecordDataLength(n: Integer): Long;
|
4349 |
begin
|
4350 |
result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
|
4351 |
end;
|
4352 |
|
4353 |
begin
|
4354 |
FBase.SetCursor;
|
4355 |
try
|
4356 |
ActivateConnection;
|
4357 |
ActivateTransaction;
|
4358 |
if FQSelect.SQL.Text = '' then
|
4359 |
IBError(ibxeEmptyQuery, [nil]);
|
4360 |
if not FInternalPrepared then
|
4361 |
InternalPrepare;
|
4362 |
if FQSelect.Statement <> nil then
|
4363 |
FQSelect.Statement.EnableStatistics(FEnableStatistics);
|
4364 |
if FQSelect.SQLStatementType = SQLSelect then
|
4365 |
begin
|
4366 |
if DefaultFields then
|
4367 |
CreateFields;
|
4368 |
FArrayFieldCount := 0;
|
4369 |
BindFields(True);
|
4370 |
FCurrentRecord := -1;
|
4371 |
FQSelect.ExecQuery;
|
4372 |
FOpen := FQSelect.Open;
|
4373 |
|
4374 |
{ Initialize offsets, buffer sizes, etc...
|
4375 |
1. Initially FRecordSize is just the "RecordDataLength".
|
4376 |
2. Allocate a "model" buffer and do a dummy fetch
|
4377 |
3. After the dummy fetch, FRecordSize will be appropriately
|
4378 |
adjusted to reflect the additional "weight" of the field
|
4379 |
data.
|
4380 |
4. Set up the FCalcFieldsOffset, FBlobCacheOffset, FArrayCacheOffset and FRecordBufferSize.
|
4381 |
5. Now, with the BufferSize available, allocate memory for chunks of records
|
4382 |
6. Re-allocate the model buffer, accounting for the new
|
4383 |
FRecordBufferSize.
|
4384 |
7. Finally, calls to AllocRecordBuffer will work!.
|
4385 |
}
|
4386 |
{Step 1}
|
4387 |
FRecordSize := RecordDataLength(FQSelect.FieldCount);
|
4388 |
{Step 2, 3}
|
4389 |
GetMem(FFieldColumns,sizeof(TFieldColumns) * (FQSelect.FieldCount));
|
4390 |
IBAlloc(FModelBuffer, 0, FRecordSize);
|
4391 |
InitModelBuffer(FQSelect, FModelBuffer);
|
4392 |
{Step 4}
|
4393 |
FCalcFieldsOffset := FRecordSize;
|
4394 |
FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
|
4395 |
FArrayCacheOffset := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
|
4396 |
FRecordBufferSize := FArrayCacheOffset + (ArrayFieldCount * sizeof(IArray));
|
4397 |
{Step 5}
|
4398 |
if UniDirectional then
|
4399 |
FBufferChunkSize := FRecordBufferSize * UniCache
|
4400 |
else
|
4401 |
FBufferChunkSize := FRecordBufferSize * BufferChunks;
|
4402 |
IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
|
4403 |
if FCachedUpdates or (csReading in ComponentState) then
|
4404 |
IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
|
4405 |
FBPos := 0;
|
4406 |
FOBPos := 0;
|
4407 |
FBEnd := 0;
|
4408 |
FOBEnd := 0;
|
4409 |
FCacheSize := FBufferChunkSize;
|
4410 |
FOldCacheSize := FBufferChunkSize;
|
4411 |
{Step 6}
|
4412 |
IBAlloc(FModelBuffer, RecordDataLength(FQSelect.FieldCount),
|
4413 |
FRecordBufferSize);
|
4414 |
{Step 7}
|
4415 |
FOldBuffer := AllocRecordBuffer;
|
4416 |
end
|
4417 |
else
|
4418 |
FQSelect.ExecQuery;
|
4419 |
finally
|
4420 |
FBase.RestoreCursor;
|
4421 |
end;
|
4422 |
end;
|
4423 |
|
4424 |
procedure TIBCustomDataSet.InternalPost;
|
4425 |
var
|
4426 |
Qry: TIBSQL;
|
4427 |
Buff: PChar;
|
4428 |
bInserting: Boolean;
|
4429 |
begin
|
4430 |
FBase.SetCursor;
|
4431 |
try
|
4432 |
Buff := GetActiveBuf;
|
4433 |
CheckEditState;
|
4434 |
AdjustRecordOnInsert(Buff);
|
4435 |
if (State = dsInsert) then
|
4436 |
begin
|
4437 |
bInserting := True;
|
4438 |
Qry := FQInsert;
|
4439 |
PRecordData(Buff)^.rdUpdateStatus := usInserted;
|
4440 |
PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
|
4441 |
WriteRecordCache(FRecordCount, Buff);
|
4442 |
FCurrentRecord := FRecordCount;
|
4443 |
end
|
4444 |
else begin
|
4445 |
bInserting := False;
|
4446 |
Qry := FQModify;
|
4447 |
if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
|
4448 |
begin
|
4449 |
PRecordData(Buff)^.rdUpdateStatus := usModified;
|
4450 |
PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
|
4451 |
end
|
4452 |
else if PRecordData(Buff)^.
|
4453 |
rdCachedUpdateStatus = cusUninserted then
|
4454 |
begin
|
4455 |
PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
|
4456 |
Dec(FDeletedRecords);
|
4457 |
end;
|
4458 |
end;
|
4459 |
if (not CachedUpdates) then
|
4460 |
InternalPostRecord(Qry, Buff)
|
4461 |
else begin
|
4462 |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
|
4463 |
FUpdatesPending := True;
|
4464 |
end;
|
4465 |
if bInserting then
|
4466 |
Inc(FRecordCount);
|
4467 |
finally
|
4468 |
FBase.RestoreCursor;
|
4469 |
end;
|
4470 |
end;
|
4471 |
|
4472 |
procedure TIBCustomDataSet.InternalRefresh;
|
4473 |
begin
|
4474 |
inherited InternalRefresh;
|
4475 |
InternalRefreshRow;
|
4476 |
end;
|
4477 |
|
4478 |
procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
|
4479 |
begin
|
4480 |
InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
|
4481 |
end;
|
4482 |
|
4483 |
function TIBCustomDataSet.IsCursorOpen: Boolean;
|
4484 |
begin
|
4485 |
result := FOpen;
|
4486 |
end;
|
4487 |
|
4488 |
procedure TIBCustomDataSet.Loaded;
|
4489 |
begin
|
4490 |
if assigned(FQSelect) then
|
4491 |
FBaseSQLSelect.assign(FQSelect.SQL);
|
4492 |
inherited Loaded;
|
4493 |
end;
|
4494 |
|
4495 |
procedure TIBCustomDataSet.Post;
|
4496 |
var CancelPost: boolean;
|
4497 |
begin
|
4498 |
CancelPost := false;
|
4499 |
if assigned(FOnValidatePost) then
|
4500 |
OnValidatePost(self,CancelPost);
|
4501 |
if CancelPost then
|
4502 |
Cancel
|
4503 |
else
|
4504 |
inherited Post;
|
4505 |
end;
|
4506 |
|
4507 |
function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
|
4508 |
Options: TLocateOptions): Boolean;
|
4509 |
var
|
4510 |
CurBookmark: TBookmark;
|
4511 |
begin
|
4512 |
DisableControls;
|
4513 |
try
|
4514 |
CurBookmark := Bookmark;
|
4515 |
First;
|
4516 |
result := InternalLocate(KeyFields, KeyValues, Options);
|
4517 |
if not result then
|
4518 |
Bookmark := CurBookmark;
|
4519 |
finally
|
4520 |
EnableControls;
|
4521 |
end;
|
4522 |
end;
|
4523 |
|
4524 |
function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
|
4525 |
const ResultFields: string): Variant;
|
4526 |
var
|
4527 |
fl: TList;
|
4528 |
CurBookmark: TBookmark;
|
4529 |
begin
|
4530 |
DisableControls;
|
4531 |
fl := TList.Create;
|
4532 |
CurBookmark := Bookmark;
|
4533 |
try
|
4534 |
First;
|
4535 |
if InternalLocate(KeyFields, KeyValues, []) then
|
4536 |
begin
|
4537 |
if (ResultFields <> '') then
|
4538 |
result := FieldValues[ResultFields]
|
4539 |
else
|
4540 |
result := NULL;
|
4541 |
end
|
4542 |
else
|
4543 |
result := Null;
|
4544 |
finally
|
4545 |
Bookmark := CurBookmark;
|
4546 |
fl.Free;
|
4547 |
EnableControls;
|
4548 |
end;
|
4549 |
end;
|
4550 |
|
4551 |
procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
|
4552 |
begin
|
4553 |
PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
|
4554 |
end;
|
4555 |
|
4556 |
procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
|
4557 |
begin
|
4558 |
PRecordData(Buffer)^.rdBookmarkFlag := Value;
|
4559 |
end;
|
4560 |
|
4561 |
procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
|
4562 |
begin
|
4563 |
if not Value and FCachedUpdates then
|
4564 |
CancelUpdates;
|
4565 |
if (not (csReading in ComponentState)) and Value then
|
4566 |
CheckDatasetClosed;
|
4567 |
FCachedUpdates := Value;
|
4568 |
end;
|
4569 |
|
4570 |
procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
|
4571 |
begin
|
4572 |
if IsLinkedTo(Value) then
|
4573 |
IBError(ibxeCircularReference, [nil]);
|
4574 |
if FDataLink <> nil then
|
4575 |
FDataLink.DataSource := Value;
|
4576 |
end;
|
4577 |
|
4578 |
procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
|
4579 |
var
|
4580 |
Buff, TmpBuff: PChar;
|
4581 |
MappedFieldPos: integer;
|
4582 |
begin
|
4583 |
Buff := GetActiveBuf;
|
4584 |
if Field.FieldNo < 0 then
|
4585 |
begin
|
4586 |
TmpBuff := Buff + FRecordSize + Field.Offset;
|
4587 |
Boolean(TmpBuff[0]) := LongBool(Buffer);
|
4588 |
if Boolean(TmpBuff[0]) then
|
4589 |
Move(Buffer^, TmpBuff[1], Field.DataSize);
|
4590 |
WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
|
4591 |
end
|
4592 |
else begin
|
4593 |
CheckEditState;
|
4594 |
with PRecordData(Buff)^ do
|
4595 |
begin
|
4596 |
{ If inserting, Adjust record position }
|
4597 |
AdjustRecordOnInsert(Buff);
|
4598 |
MappedFieldPos := FMappedFieldPosition[Field.FieldNo - 1];
|
4599 |
if (MappedFieldPos > 0) and
|
4600 |
(MappedFieldPos <= rdFieldCount) then
|
4601 |
with rdFields[MappedFieldPos], FFieldColumns^[MappedFieldPos] do
|
4602 |
begin
|
4603 |
Field.Validate(Buffer);
|
4604 |
if (Buffer = nil) or
|
4605 |
(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
|
4606 |
fdIsNull := True
|
4607 |
else
|
4608 |
begin
|
4609 |
Move(Buffer^, Buff[fdDataOfs],fdDataSize);
|
4610 |
if (fdDataType = SQL_TEXT) or (fdDataType = SQL_VARYING) then
|
4611 |
fdDataLength := StrLen(PChar(Buffer));
|
4612 |
fdIsNull := False;
|
4613 |
if rdUpdateStatus = usUnmodified then
|
4614 |
begin
|
4615 |
if CachedUpdates then
|
4616 |
begin
|
4617 |
FUpdatesPending := True;
|
4618 |
if State = dsInsert then
|
4619 |
rdCachedUpdateStatus := cusInserted
|
4620 |
else if State = dsEdit then
|
4621 |
rdCachedUpdateStatus := cusModified;
|
4622 |
end;
|
4623 |
|
4624 |
if State = dsInsert then
|
4625 |
rdUpdateStatus := usInserted
|
4626 |
else
|
4627 |
rdUpdateStatus := usModified;
|
4628 |
end;
|
4629 |
WriteRecordCache(rdRecordNumber, Buff);
|
4630 |
SetModified(True);
|
4631 |
end;
|
4632 |
end;
|
4633 |
end;
|
4634 |
end;
|
4635 |
if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
|
4636 |
DataEvent(deFieldChange, PtrInt(Field));
|
4637 |
end;
|
4638 |
|
4639 |
procedure TIBCustomDataSet.SetRecNo(Value: Integer);
|
4640 |
begin
|
4641 |
CheckBrowseMode;
|
4642 |
if (Value < 1) then
|
4643 |
Value := 1
|
4644 |
else if Value > FRecordCount then
|
4645 |
begin
|
4646 |
InternalLast;
|
4647 |
Value := Min(FRecordCount, Value);
|
4648 |
end;
|
4649 |
if (Value <> RecNo) then
|
4650 |
begin
|
4651 |
DoBeforeScroll;
|
4652 |
FCurrentRecord := Value - 1;
|
4653 |
Resync([]);
|
4654 |
DoAfterScroll;
|
4655 |
end;
|
4656 |
end;
|
4657 |
|
4658 |
procedure TIBCustomDataSet.Disconnect;
|
4659 |
begin
|
4660 |
Close;
|
4661 |
InternalUnPrepare;
|
4662 |
end;
|
4663 |
|
4664 |
procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
|
4665 |
begin
|
4666 |
if not CanModify then
|
4667 |
IBError(ibxeCannotUpdate, [nil])
|
4668 |
else
|
4669 |
FUpdateMode := Value;
|
4670 |
end;
|
4671 |
|
4672 |
|
4673 |
procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
|
4674 |
begin
|
4675 |
if Value <> FUpdateObject then
|
4676 |
begin
|
4677 |
if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
|
4678 |
FUpdateObject.DataSet := nil;
|
4679 |
FUpdateObject := Value;
|
4680 |
if Assigned(FUpdateObject) then
|
4681 |
begin
|
4682 |
if Assigned(FUpdateObject.DataSet) and
|
4683 |
(FUpdateObject.DataSet <> Self) then
|
4684 |
FUpdateObject.DataSet.UpdateObject := nil;
|
4685 |
FUpdateObject.DataSet := Self;
|
4686 |
end;
|
4687 |
end;
|
4688 |
end;
|
4689 |
|
4690 |
function TIBCustomDataSet.ConstraintsStored: Boolean;
|
4691 |
begin
|
4692 |
Result := Constraints.Count > 0;
|
4693 |
end;
|
4694 |
|
4695 |
procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
|
4696 |
begin
|
4697 |
FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
|
4698 |
end;
|
4699 |
|
4700 |
procedure TIBCustomDataSet.ClearIBLinks;
|
4701 |
var i: integer;
|
4702 |
begin
|
4703 |
for i := FIBLinks.Count - 1 downto 0 do
|
4704 |
TIBControlLink(FIBLinks[i]).IBDataSet := nil;
|
4705 |
end;
|
4706 |
|
4707 |
|
4708 |
procedure TIBCustomDataSet.InternalUnPrepare;
|
4709 |
begin
|
4710 |
if FInternalPrepared then
|
4711 |
begin
|
4712 |
CheckDatasetClosed;
|
4713 |
if FDidActivate then
|
4714 |
DeactivateTransaction;
|
4715 |
FieldDefs.Clear;
|
4716 |
FieldDefs.Updated := false;
|
4717 |
FInternalPrepared := False;
|
4718 |
Setlength(FAliasNameList,0);
|
4719 |
end;
|
4720 |
end;
|
4721 |
|
4722 |
procedure TIBCustomDataSet.InternalExecQuery;
|
4723 |
var
|
4724 |
DidActivate: Boolean;
|
4725 |
begin
|
4726 |
DidActivate := False;
|
4727 |
FBase.SetCursor;
|
4728 |
try
|
4729 |
ActivateConnection;
|
4730 |
DidActivate := ActivateTransaction;
|
4731 |
if FQSelect.SQL.Text = '' then
|
4732 |
IBError(ibxeEmptyQuery, [nil]);
|
4733 |
if not FInternalPrepared then
|
4734 |
InternalPrepare;
|
4735 |
if FQSelect.SQLStatementType = SQLSelect then
|
4736 |
begin
|
4737 |
IBError(ibxeIsASelectStatement, [nil]);
|
4738 |
end
|
4739 |
else
|
4740 |
FQSelect.ExecQuery;
|
4741 |
finally
|
4742 |
if DidActivate then
|
4743 |
DeactivateTransaction;
|
4744 |
FBase.RestoreCursor;
|
4745 |
end;
|
4746 |
end;
|
4747 |
|
4748 |
function TIBCustomDataSet.GetSelectStmtIntf: IStatement;
|
4749 |
begin
|
4750 |
Result := FQSelect.Statement;
|
4751 |
end;
|
4752 |
|
4753 |
procedure TIBCustomDataSet.SetMasterDetailDelay(AValue: integer);
|
4754 |
begin
|
4755 |
FDataLink.DelayTimerValue := AValue;
|
4756 |
end;
|
4757 |
|
4758 |
function TIBCustomDataSet.GetParser: TSelectSQLParser;
|
4759 |
begin
|
4760 |
if not assigned(FParser) then
|
4761 |
FParser := CreateParser;
|
4762 |
Result := FParser
|
4763 |
end;
|
4764 |
|
4765 |
procedure TIBCustomDataSet.ResetParser;
|
4766 |
begin
|
4767 |
if assigned(FParser) then
|
4768 |
begin
|
4769 |
FParser.Free;
|
4770 |
FParser := nil;
|
4771 |
FQSelect.OnSQLChanged := nil; {Do not react to change}
|
4772 |
try
|
4773 |
FQSelect.SQL.Assign(FBaseSQLSelect);
|
4774 |
finally
|
4775 |
FQSelect.OnSQLChanged := SQLChanged;
|
4776 |
end;
|
4777 |
end;
|
4778 |
end;
|
4779 |
|
4780 |
function TIBCustomDataSet.HasParser: boolean;
|
4781 |
begin
|
4782 |
Result := not (csDesigning in ComponentState) and (FParser <> nil)
|
4783 |
end;
|
4784 |
|
4785 |
procedure TIBCustomDataSet.SetGenerateParamNames(AValue: Boolean);
|
4786 |
begin
|
4787 |
if FGenerateParamNames = AValue then Exit;
|
4788 |
FGenerateParamNames := AValue;
|
4789 |
Disconnect
|
4790 |
end;
|
4791 |
|
4792 |
procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
|
4793 |
begin
|
4794 |
inherited InitRecord(Buffer);
|
4795 |
with PRecordData(Buffer)^ do
|
4796 |
begin
|
4797 |
rdUpdateStatus := TUpdateStatus(usInserted);
|
4798 |
rdBookMarkFlag := bfInserted;
|
4799 |
rdRecordNumber := -1;
|
4800 |
end;
|
4801 |
end;
|
4802 |
|
4803 |
procedure TIBCustomDataSet.InternalInsert;
|
4804 |
begin
|
4805 |
CursorPosChanged;
|
4806 |
end;
|
4807 |
|
4808 |
{ TIBDataSet IProviderSupport }
|
4809 |
|
4810 |
procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
|
4811 |
begin
|
4812 |
if Commit then
|
4813 |
Transaction.Commit else
|
4814 |
Transaction.Rollback;
|
4815 |
end;
|
4816 |
|
4817 |
function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
|
4818 |
ResultSet: Pointer = nil): Integer;
|
4819 |
var
|
4820 |
FQuery: TIBQuery;
|
4821 |
begin
|
4822 |
if Assigned(ResultSet) then
|
4823 |
begin
|
4824 |
TDataSet(ResultSet^) := TIBQuery.Create(nil);
|
4825 |
with TIBQuery(ResultSet^) do
|
4826 |
begin
|
4827 |
SQL.Text := ASQL;
|
4828 |
Params.Assign(AParams);
|
4829 |
Open;
|
4830 |
Result := RowsAffected;
|
4831 |
end;
|
4832 |
end
|
4833 |
else
|
4834 |
begin
|
4835 |
FQuery := TIBQuery.Create(nil);
|
4836 |
try
|
4837 |
FQuery.Database := Database;
|
4838 |
FQuery.Transaction := Transaction;
|
4839 |
FQuery.GenerateParamNames := True;
|
4840 |
FQuery.SQL.Text := ASQL;
|
4841 |
FQuery.Params.Assign(AParams);
|
4842 |
FQuery.ExecSQL;
|
4843 |
Result := FQuery.RowsAffected;
|
4844 |
finally
|
4845 |
FQuery.Free;
|
4846 |
end;
|
4847 |
end;
|
4848 |
end;
|
4849 |
|
4850 |
function TIBCustomDataSet.PSGetQuoteChar: string;
|
4851 |
begin
|
4852 |
if Database.SQLDialect = 3 then
|
4853 |
Result := '"' else
|
4854 |
Result := '';
|
4855 |
end;
|
4856 |
|
4857 |
function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
|
4858 |
var
|
4859 |
PrevErr: Integer;
|
4860 |
begin
|
4861 |
if Prev <> nil then
|
4862 |
PrevErr := Prev.ErrorCode else
|
4863 |
PrevErr := 0;
|
4864 |
if E is EIBError then
|
4865 |
with EIBError(E) do
|
4866 |
Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
|
4867 |
Result := inherited PSGetUpdateException(E, Prev);
|
4868 |
end;
|
4869 |
|
4870 |
function TIBCustomDataSet.PSInTransaction: Boolean;
|
4871 |
begin
|
4872 |
Result := Transaction.InTransaction;
|
4873 |
end;
|
4874 |
|
4875 |
function TIBCustomDataSet.PSIsSQLBased: Boolean;
|
4876 |
begin
|
4877 |
Result := True;
|
4878 |
end;
|
4879 |
|
4880 |
function TIBCustomDataSet.PSIsSQLSupported: Boolean;
|
4881 |
begin
|
4882 |
Result := True;
|
4883 |
end;
|
4884 |
|
4885 |
procedure TIBCustomDataSet.PSReset;
|
4886 |
begin
|
4887 |
inherited PSReset;
|
4888 |
if Active then
|
4889 |
begin
|
4890 |
Close;
|
4891 |
Open;
|
4892 |
end;
|
4893 |
end;
|
4894 |
|
4895 |
function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
|
4896 |
var
|
4897 |
UpdateAction: TIBUpdateAction;
|
4898 |
SQL: string;
|
4899 |
Params: TParams;
|
4900 |
|
4901 |
procedure AssignParams(DataSet: TDataSet; Params: TParams);
|
4902 |
var
|
4903 |
I: Integer;
|
4904 |
Old: Boolean;
|
4905 |
Param: TParam;
|
4906 |
PName: string;
|
4907 |
Field: TField;
|
4908 |
Value: Variant;
|
4909 |
begin
|
4910 |
for I := 0 to Params.Count - 1 do
|
4911 |
begin
|
4912 |
Param := Params[I];
|
4913 |
PName := Param.Name;
|
4914 |
Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
|
4915 |
if Old then System.Delete(PName, 1, 4);
|
4916 |
Field := DataSet.FindField(PName);
|
4917 |
if not Assigned(Field) then Continue;
|
4918 |
if Old then Param.AssignFieldValue(Field, Field.OldValue) else
|
4919 |
begin
|
4920 |
Value := Field.NewValue;
|
4921 |
if VarIsEmpty(Value) then Value := Field.OldValue;
|
4922 |
Param.AssignFieldValue(Field, Value);
|
4923 |
end;
|
4924 |
end;
|
4925 |
end;
|
4926 |
|
4927 |
begin
|
4928 |
Result := False;
|
4929 |
if Assigned(OnUpdateRecord) then
|
4930 |
begin
|
4931 |
UpdateAction := uaFail;
|
4932 |
if Assigned(FOnUpdateRecord) then
|
4933 |
begin
|
4934 |
FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
|
4935 |
Result := UpdateAction = uaApplied;
|
4936 |
end;
|
4937 |
end
|
4938 |
else if Assigned(FUpdateObject) then
|
4939 |
begin
|
4940 |
SQL := FUpdateObject.GetSQL(UpdateKind).Text;
|
4941 |
if SQL <> '' then
|
4942 |
begin
|
4943 |
Params := TParams.Create;
|
4944 |
try
|
4945 |
Params.ParseSQL(SQL, True);
|
4946 |
AssignParams(Delta, Params);
|
4947 |
if PSExecuteStatement(SQL, Params) = 0 then
|
4948 |
IBError(ibxeNoRecordsAffected, [nil]);
|
4949 |
Result := True;
|
4950 |
finally
|
4951 |
Params.Free;
|
4952 |
end;
|
4953 |
end;
|
4954 |
end;
|
4955 |
end;
|
4956 |
|
4957 |
procedure TIBCustomDataSet.PSStartTransaction;
|
4958 |
begin
|
4959 |
ActivateConnection;
|
4960 |
Transaction.StartTransaction;
|
4961 |
end;
|
4962 |
|
4963 |
function TIBCustomDataSet.PsGetTableName: string;
|
4964 |
begin
|
4965 |
// if not FInternalPrepared then
|
4966 |
// InternalPrepare;
|
4967 |
{ It is possible for the FQSelectSQL to be unprepared
|
4968 |
with FInternalPreprepared being true (see DoBeforeTransactionEnd).
|
4969 |
So check the Prepared of the SelectSQL instead }
|
4970 |
if not FQSelect.Prepared then
|
4971 |
FQSelect.Prepare;
|
4972 |
Result := FQSelect.UniqueRelationName;
|
4973 |
end;
|
4974 |
|
4975 |
procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
|
4976 |
begin
|
4977 |
InternalBatchInput(InputObject);
|
4978 |
end;
|
4979 |
|
4980 |
procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
|
4981 |
begin
|
4982 |
InternalBatchOutput(OutputObject);
|
4983 |
end;
|
4984 |
|
4985 |
procedure TIBDataSet.ExecSQL;
|
4986 |
begin
|
4987 |
InternalExecQuery;
|
4988 |
end;
|
4989 |
|
4990 |
procedure TIBDataSet.Prepare;
|
4991 |
begin
|
4992 |
InternalPrepare;
|
4993 |
end;
|
4994 |
|
4995 |
procedure TIBDataSet.UnPrepare;
|
4996 |
begin
|
4997 |
InternalUnPrepare;
|
4998 |
end;
|
4999 |
|
5000 |
function TIBDataSet.GetPrepared: Boolean;
|
5001 |
begin
|
5002 |
Result := InternalPrepared;
|
5003 |
end;
|
5004 |
|
5005 |
procedure TIBDataSet.InternalOpen;
|
5006 |
begin
|
5007 |
ActivateConnection;
|
5008 |
ActivateTransaction;
|
5009 |
InternalSetParamsFromCursor;
|
5010 |
Inherited InternalOpen;
|
5011 |
end;
|
5012 |
|
5013 |
procedure TIBDataSet.SetFiltered(Value: Boolean);
|
5014 |
begin
|
5015 |
if(Filtered <> Value) then
|
5016 |
begin
|
5017 |
inherited SetFiltered(value);
|
5018 |
if Active then
|
5019 |
begin
|
5020 |
Close;
|
5021 |
Open;
|
5022 |
end;
|
5023 |
end
|
5024 |
else
|
5025 |
inherited SetFiltered(value);
|
5026 |
end;
|
5027 |
|
5028 |
function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
|
5029 |
begin
|
5030 |
Result := false;
|
5031 |
if not Assigned(Bookmark) then
|
5032 |
exit;
|
5033 |
Result := PInteger(Bookmark)^ < FRecordCount;
|
5034 |
end;
|
5035 |
|
5036 |
function TIBCustomDataSet.GetFieldData(Field: TField;
|
5037 |
Buffer: Pointer): Boolean;
|
5038 |
{$IFDEF TBCDFIELD_IS_BCD}
|
5039 |
var
|
5040 |
lTempCurr : System.Currency;
|
5041 |
begin
|
5042 |
if (Field.DataType = ftBCD) and (Buffer <> nil) then
|
5043 |
begin
|
5044 |
Result := InternalGetFieldData(Field, @lTempCurr);
|
5045 |
if Result then
|
5046 |
CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
|
5047 |
end
|
5048 |
else
|
5049 |
{$ELSE}
|
5050 |
begin
|
5051 |
{$ENDIF}
|
5052 |
Result := InternalGetFieldData(Field, Buffer);
|
5053 |
end;
|
5054 |
|
5055 |
function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
|
5056 |
NativeFormat: Boolean): Boolean;
|
5057 |
begin
|
5058 |
{These datatypes use IBX conventions and not TDataset conventions}
|
5059 |
if (Field.DataType in [ftBCD,ftDateTime,ftDate,ftTime]) and not NativeFormat then
|
5060 |
Result := InternalGetFieldData(Field, Buffer)
|
5061 |
else
|
5062 |
Result := inherited GetFieldData(Field, Buffer, NativeFormat);
|
5063 |
end;
|
5064 |
|
5065 |
procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
|
5066 |
{$IFDEF TDBDFIELD_IS_BCD}
|
5067 |
var
|
5068 |
lTempCurr : System.Currency;
|
5069 |
begin
|
5070 |
if (Field.DataType = ftBCD) and (Buffer <> nil) then
|
5071 |
begin
|
5072 |
BCDToCurr(TBCD(Buffer^), lTempCurr);
|
5073 |
InternalSetFieldData(Field, @lTempCurr);
|
5074 |
end
|
5075 |
else
|
5076 |
{$ELSE}
|
5077 |
begin
|
5078 |
{$ENDIF}
|
5079 |
InternalSetFieldData(Field, Buffer);
|
5080 |
end;
|
5081 |
|
5082 |
procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
|
5083 |
NativeFormat: Boolean);
|
5084 |
begin
|
5085 |
{These datatypes use IBX conventions and not TDataset conventions}
|
5086 |
if (not NativeFormat) and (Field.DataType in [ftBCD,ftDateTime,ftDate,ftTime]) then
|
5087 |
InternalSetfieldData(Field, Buffer)
|
5088 |
else
|
5089 |
inherited SetFieldData(Field, buffer, NativeFormat);
|
5090 |
end;
|
5091 |
|
5092 |
{ TIBDataSetUpdateObject }
|
5093 |
|
5094 |
constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
|
5095 |
begin
|
5096 |
inherited Create(AOwner);
|
5097 |
FRefreshSQL := TStringList.Create;
|
5098 |
end;
|
5099 |
|
5100 |
destructor TIBDataSetUpdateObject.Destroy;
|
5101 |
begin
|
5102 |
FRefreshSQL.Free;
|
5103 |
inherited Destroy;
|
5104 |
end;
|
5105 |
|
5106 |
function TIBDataSetUpdateObject.GetRowsAffected(
|
5107 |
var SelectCount, InsertCount, UpdateCount, DeleteCount: integer): boolean;
|
5108 |
begin
|
5109 |
Result := true;
|
5110 |
SelectCount := 0;
|
5111 |
InsertCount := 0;
|
5112 |
UpdateCount := 0;
|
5113 |
DeleteCount := 0;
|
5114 |
end;
|
5115 |
|
5116 |
procedure TIBDataSetUpdateObject.SetRefreshSQL(value: TStrings);
|
5117 |
begin
|
5118 |
FRefreshSQL.Assign(Value);
|
5119 |
end;
|
5120 |
|
5121 |
procedure TIBDataSetUpdateObject.InternalSetParams(Params: ISQLParams;
|
5122 |
buff: PChar);
|
5123 |
begin
|
5124 |
if not Assigned(DataSet) then Exit;
|
5125 |
DataSet.SetInternalSQLParams(Params, buff);
|
5126 |
end;
|
5127 |
|
5128 |
procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
|
5129 |
begin
|
5130 |
InternalSetParams(Query.Params,buff);
|
5131 |
end;
|
5132 |
|
5133 |
procedure TIBDataSetUpdateObject.UpdateRecordFromQuery(UpdateKind: TUpdateKind;
|
5134 |
QryResults: IResults; Buffer: PChar);
|
5135 |
begin
|
5136 |
if not Assigned(DataSet) then Exit;
|
5137 |
case UpdateKind of
|
5138 |
ukModify, ukInsert:
|
5139 |
DataSet.UpdateRecordFromQuery(QryResults, Buffer);
|
5140 |
ukDelete:
|
5141 |
DataSet.DoDeleteReturning(QryResults);
|
5142 |
end;
|
5143 |
end;
|
5144 |
|
5145 |
function TIBDSBlobStream.GetSize: Int64;
|
5146 |
begin
|
5147 |
Result := FBlobStream.BlobSize;
|
5148 |
end;
|
5149 |
|
5150 |
{ TIBDSBlobStream }
|
5151 |
constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
|
5152 |
Mode: TBlobStreamMode);
|
5153 |
begin
|
5154 |
FField := AField;
|
5155 |
FBlobStream := ABlobStream;
|
5156 |
FBlobStream.Seek(0, soFromBeginning);
|
5157 |
if (Mode = bmWrite) then
|
5158 |
begin
|
5159 |
FBlobStream.Truncate;
|
5160 |
TIBCustomDataSet(FField.DataSet).RecordModified(True);
|
5161 |
TBlobField(FField).Modified := true;
|
5162 |
FHasWritten := true;
|
5163 |
end;
|
5164 |
end;
|
5165 |
|
5166 |
destructor TIBDSBlobStream.Destroy;
|
5167 |
begin
|
5168 |
if FHasWritten then
|
5169 |
TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
|
5170 |
inherited Destroy;
|
5171 |
end;
|
5172 |
|
5173 |
function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
|
5174 |
begin
|
5175 |
result := FBlobStream.Read(Buffer, Count);
|
5176 |
end;
|
5177 |
|
5178 |
function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
|
5179 |
begin
|
5180 |
result := FBlobStream.Seek(Offset, Origin);
|
5181 |
end;
|
5182 |
|
5183 |
procedure TIBDSBlobStream.SetSize(NewSize: Longint);
|
5184 |
begin
|
5185 |
FBlobStream.SetSize(NewSize);
|
5186 |
end;
|
5187 |
|
5188 |
function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
|
5189 |
begin
|
5190 |
if not (FField.DataSet.State in [dsEdit, dsInsert]) then
|
5191 |
IBError(ibxeNotEditing, [nil]);
|
5192 |
TIBCustomDataSet(FField.DataSet).RecordModified(True);
|
5193 |
TBlobField(FField).Modified := true;
|
5194 |
result := FBlobStream.Write(Buffer, Count);
|
5195 |
FHasWritten := true;
|
5196 |
{ TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
|
5197 |
Removed as this caused a seek to beginning of the blob stream thus corrupting
|
5198 |
the blob stream. Moved to the destructor i.e. called after blob written}
|
5199 |
end;
|
5200 |
|
5201 |
{ TIBGenerator }
|
5202 |
|
5203 |
procedure TIBGenerator.SetIncrement(const AValue: integer);
|
5204 |
begin
|
5205 |
if FIncrement = AValue then Exit;
|
5206 |
if AValue < 0 then
|
5207 |
IBError(ibxeNegativeGenerator,[]);
|
5208 |
FIncrement := AValue;
|
5209 |
SetQuerySQL;
|
5210 |
end;
|
5211 |
|
5212 |
procedure TIBGenerator.SetTransaction(AValue: TIBTransaction);
|
5213 |
begin
|
5214 |
FQuery.Transaction := AValue;
|
5215 |
end;
|
5216 |
|
5217 |
procedure TIBGenerator.SetQuerySQL;
|
5218 |
begin
|
5219 |
FQuery.SQL.Text := Format('Select Gen_ID(%s,%d) From RDB$Database',[FGeneratorName,Increment]);
|
5220 |
end;
|
5221 |
|
5222 |
function TIBGenerator.GetDatabase: TIBDatabase;
|
5223 |
begin
|
5224 |
Result := FQuery.Database;
|
5225 |
end;
|
5226 |
|
5227 |
function TIBGenerator.GetTransaction: TIBTransaction;
|
5228 |
begin
|
5229 |
Result := FQuery.Transaction;
|
5230 |
end;
|
5231 |
|
5232 |
procedure TIBGenerator.SetDatabase(AValue: TIBDatabase);
|
5233 |
begin
|
5234 |
FQuery.Database := AValue;
|
5235 |
end;
|
5236 |
|
5237 |
procedure TIBGenerator.SetGeneratorName(AValue: string);
|
5238 |
begin
|
5239 |
if FGeneratorName = AValue then Exit;
|
5240 |
FGeneratorName := AValue;
|
5241 |
SetQuerySQL;
|
5242 |
end;
|
5243 |
|
5244 |
function TIBGenerator.GetNextValue: integer;
|
5245 |
begin
|
5246 |
with FQuery do
|
5247 |
begin
|
5248 |
Transaction.Active := true;
|
5249 |
ExecQuery;
|
5250 |
try
|
5251 |
Result := Fields[0].AsInteger
|
5252 |
finally
|
5253 |
Close
|
5254 |
end;
|
5255 |
end;
|
5256 |
end;
|
5257 |
|
5258 |
constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
|
5259 |
begin
|
5260 |
FOwner := Owner;
|
5261 |
FIncrement := 1;
|
5262 |
FQuery := TIBSQL.Create(nil);
|
5263 |
end;
|
5264 |
|
5265 |
destructor TIBGenerator.Destroy;
|
5266 |
begin
|
5267 |
if assigned(FQuery) then FQuery.Free;
|
5268 |
inherited Destroy;
|
5269 |
end;
|
5270 |
|
5271 |
|
5272 |
procedure TIBGenerator.Apply;
|
5273 |
begin
|
5274 |
if assigned(Database) and assigned(Transaction) and
|
5275 |
(FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then
|
5276 |
Owner.FieldByName(FFieldName).AsInteger := GetNextValue;
|
5277 |
end;
|
5278 |
|
5279 |
|
5280 |
end.
|