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(*
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* Firebird Interface (fbintf). The fbintf components provide a set of
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* Pascal language bindings for the Firebird API.
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*
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* The contents of this file are subject to the Initial Developer's
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* Public License Version 1.0 (the "License"); you may not use this
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* file except in compliance with the License. You may obtain a copy
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* of the License here:
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*
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* http://www.firebirdsql.org/index.php?op=doc&id=idpl
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Initial Developer of the Original Code is Tony Whyman.
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*
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* The Original Code is (C) 2016 Tony Whyman, MWA Software
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* (http://www.mwasoftware.co.uk).
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*
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* All Rights Reserved.
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*
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* Contributor(s): ______________________________________.
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*
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*)
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unit FBAttachment;
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{$IFDEF MSWINDOWS}
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{$DEFINE WINDOWS}
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{$ENDIF}
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{$IFDEF FPC}
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{$mode delphi}
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{$interfaces COM}
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{$ENDIF}
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interface
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uses
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Classes, SysUtils, {$IFDEF WINDOWS} windows, {$ENDIF} IB, FBParamBlock, FBActivityMonitor;
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type
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TCharsetMap = record
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CharsetID: integer;
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CharSetName: AnsiString;
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CharSetWidth: integer;
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CodePage: TSystemCodePage;
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AllowReverseLookup: boolean; {used to ensure that lookup of CP_UTF* does not return UNICODE_FSS}
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end;
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{ TFBAttachment }
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TFBAttachment = class(TActivityHandler)
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private
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FDPB: IDPB;
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FFirebirdAPI: IFirebirdAPI;
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FUserCharSetMap: array of TCharSetMap;
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protected
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FDatabaseName: AnsiString;
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FRaiseExceptionOnConnectError: boolean;
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FSQLDialect: integer;
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FHasDefaultCharSet: boolean;
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FCharSetID: integer;
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FCodePage: TSystemCodePage;
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constructor Create(DatabaseName: AnsiString; DPB: IDPB;
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RaiseExceptionOnConnectError: boolean);
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procedure CheckHandle; virtual; abstract;
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function GenerateCreateDatabaseSQL(DatabaseName: AnsiString; aDPB: IDPB): AnsiString;
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procedure EndAllTransactions;
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procedure SetParameters(SQLParams: ISQLParams; params: array of const);
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public
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destructor Destroy; override;
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function getDPB: IDPB;
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function AllocateBPB: IBPB;
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function StartTransaction(TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction; overload; virtual; abstract;
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function StartTransaction(TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction; overload; virtual; abstract;
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procedure Disconnect(Force: boolean=false); virtual; abstract;
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procedure ExecImmediate(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer); overload; virtual; abstract;
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procedure ExecImmediate(TPB: array of byte; sql: AnsiString; aSQLDialect: integer); overload;
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procedure ExecImmediate(transaction: ITransaction; sql: AnsiString); overload;
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procedure ExecImmediate(TPB: array of byte; sql: AnsiString); overload;
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function ExecuteSQL(TPB: array of byte; sql: AnsiString; SQLDialect: integer; params: array of const): IResults; overload;
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function ExecuteSQL(transaction: ITransaction; sql: AnsiString; SQLDialect: integer; params: array of const): IResults; overload;
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function ExecuteSQL(TPB: array of byte; sql: AnsiString; params: array of const): IResults; overload;
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function ExecuteSQL(transaction: ITransaction; sql: AnsiString; params: array of const): IResults; overload;
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function OpenCursor(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer): IResultSet; overload;
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function OpenCursor(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer;
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params: array of const): IResultSet; overload;
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function OpenCursor(transaction: ITransaction; sql: AnsiString): IResultSet; overload;
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function OpenCursor(transaction: ITransaction; sql: AnsiString;
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params: array of const): IResultSet; overload;
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function OpenCursorAtStart(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer): IResultSet; overload;
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function OpenCursorAtStart(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer;
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params: array of const): IResultSet; overload;
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function OpenCursorAtStart(transaction: ITransaction; sql: AnsiString): IResultSet; overload;
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function OpenCursorAtStart(transaction: ITransaction; sql: AnsiString;
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params: array of const): IResultSet; overload;
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function OpenCursorAtStart(sql: AnsiString): IResultSet; overload;
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function OpenCursorAtStart(sql: AnsiString;
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params: array of const): IResultSet; overload;
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function Prepare(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer): IStatement; overload; virtual; abstract;
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function Prepare(transaction: ITransaction; sql: AnsiString): IStatement; overload;
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function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
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aSQLDialect: integer; GenerateParamNames: boolean=false): IStatement; overload; virtual; abstract;
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function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
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GenerateParamNames: boolean=false): IStatement; overload;
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function GetEventHandler(Events: TStrings): IEvents; overload; virtual; abstract;
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function GetEventHandler(Event: AnsiString): IEvents; overload;
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function GetSQLDialect: integer;
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function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload; virtual; abstract;
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function OpenBlob(transaction: ITransaction; Field: ISQLData; BPB: IBPB=nil): IBlob; overload;
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property SQLDialect: integer read FSQLDialect;
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property DPB: IDPB read FDPB;
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public
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{Character Sets}
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function HasDefaultCharSet: boolean;
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function GetDefaultCharSetID: integer;
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function GetCharsetName(CharSetID: integer): AnsiString;
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function CharSetID2CodePage(CharSetID: integer; var CodePage: TSystemCodePage): boolean;
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function CodePage2CharSetID(CodePage: TSystemCodePage; var CharSetID: integer): boolean;
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function CharSetName2CharSetID(CharSetName: AnsiString; var CharSetID: integer): boolean;
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function CharSetWidth(CharSetID: integer; var Width: integer): boolean;
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procedure RegisterCharSet(CharSetName: AnsiString; CodePage: TSystemCodePage;
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AllowReverseLookup:boolean; out CharSetID: integer);
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property CharSetID: integer read FCharSetID;
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property CodePage: TSystemCodePage read FCodePage;
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end;
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implementation
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uses FBMessages, FBTransaction;
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const
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CharSetMap: array [0..69] of TCharsetMap = (
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(CharsetID: 0; CharSetName: 'NONE'; CharSetWidth: 1; CodePage: CP_ACP; AllowReverseLookup: true),
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(CharsetID: 1; CharSetName: 'OCTETS'; CharSetWidth: 1; CodePage: CP_NONE; AllowReverseLookup: true),
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(CharsetID: 2; CharSetName: 'ASCII'; CharSetWidth: 1; CodePage: CP_ASCII; AllowReverseLookup: true),
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(CharsetID: 3; CharSetName: 'UNICODE_FSS'; CharSetWidth: 3; CodePage: CP_UTF8; AllowReverseLookup: false),
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(CharsetID: 4; CharSetName: 'UTF8'; CharSetWidth: 4; CodePage: CP_UTF8; AllowReverseLookup: true),
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(CharsetID: 5; CharSetName: 'SJIS_0208'; CharSetWidth: 2; CodePage: 20932; AllowReverseLookup: true),
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(CharsetID: 6; CharSetName: 'EUCJ_0208'; CharSetWidth: 2; CodePage: 20932; AllowReverseLookup: true),
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(CharsetID: 7; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: true),
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(CharsetID: 8; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: true),
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(CharsetID: 9; CharSetName: 'DOS737'; CharSetWidth: 1; CodePage: 737; AllowReverseLookup: true),
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(CharsetID: 10; CharSetName: 'DOS437'; CharSetWidth: 1; CodePage: 437; AllowReverseLookup: true),
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(CharsetID: 11; CharSetName: 'DOS850'; CharSetWidth: 1; CodePage: 850; AllowReverseLookup: true),
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(CharsetID: 12; CharSetName: 'DOS865'; CharSetWidth: 1; CodePage: 865; AllowReverseLookup: true),
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(CharsetID: 13; CharSetName: 'DOS860'; CharSetWidth: 1; CodePage: 860; AllowReverseLookup: true),
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(CharsetID: 14; CharSetName: 'DOS863'; CharSetWidth: 1; CodePage: 863; AllowReverseLookup: true),
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(CharsetID: 15; CharSetName: 'DOS775'; CharSetWidth: 1; CodePage: 775; AllowReverseLookup: true),
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(CharsetID: 16; CharSetName: 'DOS858'; CharSetWidth: 1; CodePage: 858; AllowReverseLookup: true),
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(CharsetID: 17; CharSetName: 'DOS862'; CharSetWidth: 1; CodePage: 862; AllowReverseLookup: true),
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(CharsetID: 18; CharSetName: 'DOS864'; CharSetWidth: 1; CodePage: 864; AllowReverseLookup: true),
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(CharsetID: 19; CharSetName: 'NEXT'; CharSetWidth: 1; CodePage: CP_NONE; AllowReverseLookup: true),
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(CharsetID: 20; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: true),
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(CharsetID: 21; CharSetName: 'ISO8859_1'; CharSetWidth: 1; CodePage: 28591; AllowReverseLookup: true),
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(CharsetID: 22; CharSetName: 'ISO8859_2'; CharSetWidth: 1; CodePage: 28592; AllowReverseLookup: true),
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(CharsetID: 23; CharSetName: 'ISO8859_3'; CharSetWidth: 1; CodePage: 28593; AllowReverseLookup: true),
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(CharsetID: 24; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 25; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 26; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 27; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 28; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 29; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 30; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 31; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 32; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 33; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 34; CharSetName: 'ISO8859_4'; CharSetWidth: 1; CodePage: 28594; AllowReverseLookup: true),
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(CharsetID: 35; CharSetName: 'ISO8859_5'; CharSetWidth: 1; CodePage: 28595; AllowReverseLookup: true),
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(CharsetID: 36; CharSetName: 'ISO8859_6'; CharSetWidth: 1; CodePage: 28596; AllowReverseLookup: true),
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(CharsetID: 37; CharSetName: 'ISO8859_7'; CharSetWidth: 1; CodePage: 28597; AllowReverseLookup: true),
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(CharsetID: 38; CharSetName: 'ISO8859_8'; CharSetWidth: 1; CodePage: 28598; AllowReverseLookup: true),
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(CharsetID: 39; CharSetName: 'ISO8859_9'; CharSetWidth: 1; CodePage: 28599; AllowReverseLookup: true),
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(CharsetID: 40; CharSetName: 'ISO8859_13'; CharSetWidth: 1; CodePage: 28603; AllowReverseLookup: true),
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(CharsetID: 41; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 42; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 43; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 44; CharSetName: 'KSC_5601'; CharSetWidth: 2; CodePage: 949; AllowReverseLookup: true),
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(CharsetID: 45; CharSetName: 'DOS852'; CharSetWidth: 1; CodePage: 852; AllowReverseLookup: true),
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(CharsetID: 46; CharSetName: 'DOS857'; CharSetWidth: 1; CodePage: 857; AllowReverseLookup: true),
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(CharsetID: 47; CharSetName: 'DOS861'; CharSetWidth: 1; CodePage: 861; AllowReverseLookup: true),
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(CharsetID: 48; CharSetName: 'DOS866'; CharSetWidth: 1; CodePage: 866; AllowReverseLookup: true),
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(CharsetID: 49; CharSetName: 'DOS869'; CharSetWidth: 1; CodePage: 869; AllowReverseLookup: true),
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(CharsetID: 50; CharSetName: 'CYRL'; CharSetWidth: 1; CodePage: 1251; AllowReverseLookup: true),
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(CharsetID: 51; CharSetName: 'WIN1250'; CharSetWidth: 1; CodePage: 1250; AllowReverseLookup: true),
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(CharsetID: 52; CharSetName: 'WIN1251'; CharSetWidth: 1; CodePage: 1251; AllowReverseLookup: true),
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(CharsetID: 53; CharSetName: 'WIN1252'; CharSetWidth: 1; CodePage: 1252; AllowReverseLookup: true),
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(CharsetID: 54; CharSetName: 'WIN1253'; CharSetWidth: 1; CodePage: 1253; AllowReverseLookup: true),
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(CharsetID: 55; CharSetName: 'WIN1254'; CharSetWidth: 1; CodePage: 1254; AllowReverseLookup: true),
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(CharsetID: 56; CharSetName: 'BIG_5'; CharSetWidth: 2; CodePage: 950; AllowReverseLookup: true),
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(CharsetID: 57; CharSetName: 'GB_2312'; CharSetWidth: 2; CodePage: 936; AllowReverseLookup: true),
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(CharsetID: 58; CharSetName: 'WIN1255'; CharSetWidth: 1; CodePage: 1255; AllowReverseLookup: true),
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(CharsetID: 59; CharSetName: 'WIN1256'; CharSetWidth: 1; CodePage: 1256; AllowReverseLookup: true),
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(CharsetID: 60; CharSetName: 'WIN1257'; CharSetWidth: 1; CodePage: 1257; AllowReverseLookup: true),
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(CharsetID: 61; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 62; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
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(CharsetID: 63; CharSetName: 'KOI8R'; CharSetWidth: 1; CodePage: 20866; AllowReverseLookup: true),
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(CharsetID: 64; CharSetName: 'KOI8U'; CharSetWidth: 1; CodePage: 21866; AllowReverseLookup: true),
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(CharsetID: 65; CharSetName: 'WIN1258'; CharSetWidth: 1; CodePage: 1258; AllowReverseLookup: true),
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(CharsetID: 66; CharSetName: 'TIS620'; CharSetWidth: 1; CodePage: 874; AllowReverseLookup: true),
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(CharsetID: 67; CharSetName: 'GBK'; CharSetWidth: 2; CodePage: 936; AllowReverseLookup: true),
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(CharsetID: 68; CharSetName: 'CP943C'; CharSetWidth: 2; CodePage: 943; AllowReverseLookup: true),
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(CharsetID: 69; CharSetName: 'GB18030'; CharSetWidth: 4; CodePage: 54936; AllowReverseLookup: true)
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);
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{ TFBAttachment }
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constructor TFBAttachment.Create(DatabaseName: AnsiString; DPB: IDPB;
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RaiseExceptionOnConnectError: boolean);
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begin
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inherited Create;
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FFirebirdAPI := FirebirdAPI; {Keep reference to interface}
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FSQLDialect := 3;
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FDatabaseName := DatabaseName;
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FDPB := DPB;
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SetLength(FUserCharSetMap,0);
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FRaiseExceptionOnConnectError := RaiseExceptionOnConnectError;
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end;
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function TFBAttachment.GenerateCreateDatabaseSQL(DatabaseName: AnsiString; aDPB: IDPB): AnsiString;
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var CreateParams: AnsiString;
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DPBItem: IDPBItem;
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begin
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CreateParams := '';
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if aDPB <> nil then
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begin
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DPBItem := aDPB.Find(isc_dpb_user_name);
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if DPBItem <> nil then
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CreateParams := CreateParams + ' USER ''' + DPBItem.AsString + '''';
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DPBItem := aDPB.Find(isc_dpb_password);
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if DPBItem <> nil then
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CreateParams := CreateParams + ' Password ''' + DPBItem.AsString + '''';
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DPBItem := aDPB.Find(isc_dpb_page_size);
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if DPBItem <> nil then
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CreateParams := CreateParams + ' PAGE_SIZE ' + DPBItem.AsString;
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DPBItem := aDPB.Find(isc_dpb_lc_ctype);
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if DPBItem <> nil then
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CreateParams := CreateParams + ' DEFAULT CHARACTER SET ' + DPBItem.AsString;
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DPBItem := aDPB.Find(isc_dpb_sql_dialect);
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if DPBItem <> nil then
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FSQLDialect := DPBItem.AsInteger;
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end;
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Result := 'CREATE DATABASE ''' + DatabaseName + ''' ' + CreateParams; {do not localize}
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end;
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procedure TFBAttachment.EndAllTransactions;
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var i: integer;
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intf: TInterfacedObject;
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begin
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for i := 0 to InterfaceCount - 1 do
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begin
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intf := GetInterface(i);
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if (intf <> nil) and (intf is TFBTransaction) then
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TFBTransaction(intf).DoDefaultTransactionEnd(true);
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end;
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end;
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procedure TFBAttachment.SetParameters(SQLParams: ISQLParams;
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params: array of const);
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var i: integer;
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begin
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if SQLParams.Count <> Length(params) then
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IBError(ibxeInvalidParamCount,[SQLParams.Count,Length(params)]);
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for i := 0 to High(params) do
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begin
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case params[i].vtype of
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vtinteger :
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SQLParams[i].AsInteger := params[i].vinteger;
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vtInt64:
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SQLParams[i].AsInt64 := params[i].VInt64^;
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{$IF declared (vtQWord)}
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vtQWord:
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SQLParams[i].AsInt64 := params[i].VQWord^;
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{$IFEND}
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vtboolean :
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SQLParams[i].AsBoolean := params[i].vboolean;
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vtchar :
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SQLParams[i].AsString := params[i].vchar;
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vtextended :
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SQLParams[i].AsDouble := params[i].VExtended^;
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vtCurrency:
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SQLParams[i].AsDouble := params[i].VCurrency^;
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vtString :
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SQLParams[i].AsString := strpas(PChar(params[i].VString));
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vtPChar :
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SQLParams[i].AsString := strpas(params[i].VPChar);
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vtAnsiString :
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SQLParams[i].AsString := strpas(PAnsiChar(params[i].VAnsiString));
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vtVariant:
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SQLParams[i].AsVariant := params[i].VVariant^;
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vtWideChar:
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SQLParams[i].AsString := UTF8Encode(WideCharLenToString(@params[i].VWideChar,1));
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vtPWideChar:
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SQLParams[i].AsString := UTF8Encode(strpas(PWideChar(params[i].VPWideChar)));
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vtWideString:
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SQLParams[i].AsString := UTF8Encode(strpas(PWideChar(params[i].VWideString)));
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vtUnicodeString:
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SQLParams[i].AsString := UTF8Encode(strpas(PWideChar(params[i].VUnicodeString)));
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else
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IBError(ibxeInvalidVariantType,[nil]);
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end;
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end;
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end;
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destructor TFBAttachment.Destroy;
|
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begin
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Disconnect(true);
|
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inherited Destroy;
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end;
|
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|
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function TFBAttachment.getDPB: IDPB;
|
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begin
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Result := FDPB;
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end;
|
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|
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function TFBAttachment.AllocateBPB: IBPB;
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begin
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Result := TBPB.Create;
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end;
|
332 |
|
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procedure TFBAttachment.ExecImmediate(TPB: array of byte; sql: AnsiString;
|
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aSQLDialect: integer);
|
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begin
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ExecImmediate(StartTransaction(TPB,taCommit),sql,aSQLDialect);
|
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end;
|
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|
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procedure TFBAttachment.ExecImmediate(transaction: ITransaction; sql: AnsiString);
|
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begin
|
341 |
ExecImmediate(transaction,sql,FSQLDialect);
|
342 |
end;
|
343 |
|
344 |
procedure TFBAttachment.ExecImmediate(TPB: array of byte; sql: AnsiString);
|
345 |
begin
|
346 |
ExecImmediate(StartTransaction(TPB,taCommit),sql,FSQLDialect);
|
347 |
end;
|
348 |
|
349 |
function TFBAttachment.ExecuteSQL(TPB: array of byte; sql: AnsiString;
|
350 |
SQLDialect: integer; params: array of const): IResults;
|
351 |
begin
|
352 |
Result := ExecuteSQL(StartTransaction(TPB,taCommit),sql,FSQLDialect,params);
|
353 |
end;
|
354 |
|
355 |
function TFBAttachment.ExecuteSQL(transaction: ITransaction; sql: AnsiString;
|
356 |
SQLDialect: integer; params: array of const): IResults;
|
357 |
begin
|
358 |
with Prepare(transaction,sql,SQLDialect) do
|
359 |
begin
|
360 |
SetParameters(SQLParams,params);
|
361 |
Result := Execute;
|
362 |
end;
|
363 |
end;
|
364 |
|
365 |
function TFBAttachment.ExecuteSQL(TPB: array of byte; sql: AnsiString;
|
366 |
params: array of const): IResults;
|
367 |
begin
|
368 |
Result := ExecuteSQL(StartTransaction(TPB,taCommit),sql,params);
|
369 |
end;
|
370 |
|
371 |
function TFBAttachment.ExecuteSQL(transaction: ITransaction; sql: AnsiString;
|
372 |
params: array of const): IResults;
|
373 |
begin
|
374 |
with Prepare(transaction,sql,FSQLDialect) do
|
375 |
begin
|
376 |
SetParameters(SQLParams,params);
|
377 |
Result := Execute;
|
378 |
end;
|
379 |
end;
|
380 |
|
381 |
function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString;
|
382 |
aSQLDialect: integer): IResultSet;
|
383 |
begin
|
384 |
Result := OpenCursor(transaction,sql,aSQLDialect,[]);
|
385 |
end;
|
386 |
|
387 |
function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString;
|
388 |
aSQLDialect: integer; params: array of const): IResultSet;
|
389 |
var Statement: IStatement;
|
390 |
begin
|
391 |
CheckHandle;
|
392 |
Statement := Prepare(transaction,sql,aSQLDialect);
|
393 |
SetParameters(Statement.SQLParams,params);
|
394 |
Result := Statement.OpenCursor;
|
395 |
end;
|
396 |
|
397 |
function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString
|
398 |
): IResultSet;
|
399 |
begin
|
400 |
Result := OpenCursor(transaction,sql,FSQLDialect,[]);
|
401 |
end;
|
402 |
|
403 |
function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString;
|
404 |
params: array of const): IResultSet;
|
405 |
begin
|
406 |
Result := OpenCursor(transaction,sql,FSQLDialect,params);
|
407 |
end;
|
408 |
|
409 |
function TFBAttachment.OpenCursorAtStart(transaction: ITransaction;
|
410 |
sql: AnsiString; aSQLDialect: integer): IResultSet;
|
411 |
begin
|
412 |
Result := OpenCursor(transaction,sql,aSQLDialect,[]);
|
413 |
Result.FetchNext;
|
414 |
end;
|
415 |
|
416 |
function TFBAttachment.OpenCursorAtStart(transaction: ITransaction;
|
417 |
sql: AnsiString; aSQLDialect: integer; params: array of const): IResultSet;
|
418 |
begin
|
419 |
Result := OpenCursor(transaction,sql,aSQLDialect,params);
|
420 |
Result.FetchNext;
|
421 |
end;
|
422 |
|
423 |
function TFBAttachment.OpenCursorAtStart(transaction: ITransaction; sql: AnsiString
|
424 |
): IResultSet;
|
425 |
begin
|
426 |
Result := OpenCursorAtStart(transaction,sql,FSQLDialect,[]);
|
427 |
end;
|
428 |
|
429 |
function TFBAttachment.OpenCursorAtStart(transaction: ITransaction;
|
430 |
sql: AnsiString; params: array of const): IResultSet;
|
431 |
begin
|
432 |
Result := OpenCursorAtStart(transaction,sql,FSQLDialect,params);
|
433 |
end;
|
434 |
|
435 |
function TFBAttachment.OpenCursorAtStart(sql: AnsiString): IResultSet;
|
436 |
begin
|
437 |
Result := OpenCursorAtStart(sql,[]);
|
438 |
end;
|
439 |
|
440 |
function TFBAttachment.OpenCursorAtStart(sql: AnsiString;
|
441 |
params: array of const): IResultSet;
|
442 |
begin
|
443 |
Result := OpenCursorAtStart(StartTransaction([isc_tpb_read,isc_tpb_wait,isc_tpb_concurrency],taCommit),sql,FSQLDialect,params);
|
444 |
end;
|
445 |
|
446 |
function TFBAttachment.Prepare(transaction: ITransaction; sql: AnsiString
|
447 |
): IStatement;
|
448 |
begin
|
449 |
Result := Prepare(transaction,sql,FSQLDialect);
|
450 |
end;
|
451 |
|
452 |
function TFBAttachment.PrepareWithNamedParameters(transaction: ITransaction;
|
453 |
sql: AnsiString; GenerateParamNames: boolean): IStatement;
|
454 |
begin
|
455 |
Result := PrepareWithNamedParameters(transaction,sql,FSQLDialect,GenerateParamNames);
|
456 |
end;
|
457 |
|
458 |
function TFBAttachment.GetEventHandler(Event: AnsiString): IEvents;
|
459 |
var S: TStringList;
|
460 |
begin
|
461 |
S := TStringList.Create;
|
462 |
try
|
463 |
S.Add(Event);
|
464 |
Result := GetEventHandler(S);
|
465 |
finally
|
466 |
S.Free;
|
467 |
end;
|
468 |
end;
|
469 |
|
470 |
function TFBAttachment.GetSQLDialect: integer;
|
471 |
begin
|
472 |
Result := FSQLDialect;
|
473 |
end;
|
474 |
|
475 |
function TFBAttachment.OpenBlob(transaction: ITransaction; Field: ISQLData;
|
476 |
BPB: IBPB): IBlob;
|
477 |
begin
|
478 |
Result := OpenBlob(Transaction,Field.GetBlobMetadata, Field.AsQuad,BPB);
|
479 |
end;
|
480 |
|
481 |
function TFBAttachment.HasDefaultCharSet: boolean;
|
482 |
begin
|
483 |
Result := FHasDefaultCharSet
|
484 |
end;
|
485 |
|
486 |
function TFBAttachment.GetDefaultCharSetID: integer;
|
487 |
begin
|
488 |
Result := FCharsetID;
|
489 |
end;
|
490 |
|
491 |
function TFBAttachment.GetCharsetName(CharSetID: integer): AnsiString;
|
492 |
var i: integer;
|
493 |
begin
|
494 |
Result := '';
|
495 |
if (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap)) and
|
496 |
(CharSetMap[CharSetID].CharSetID = CharSetID) then
|
497 |
begin
|
498 |
Result := CharSetMap[CharSetID].CharSetName;
|
499 |
Exit;
|
500 |
end;
|
501 |
|
502 |
for i := 0 to Length(FUserCharSetMap) - 1 do
|
503 |
if FUserCharSetMap[i].CharSetID = CharSetID then
|
504 |
begin
|
505 |
Result := FUserCharSetMap[i].CharSetName;
|
506 |
Exit;
|
507 |
end;
|
508 |
end;
|
509 |
|
510 |
function TFBAttachment.CharSetID2CodePage(CharSetID: integer;
|
511 |
var CodePage: TSystemCodePage): boolean;
|
512 |
var i: integer;
|
513 |
begin
|
514 |
Result := (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap))
|
515 |
and (CharSetMap[CharSetID].CharSetID = CharSetID);
|
516 |
if Result then
|
517 |
begin
|
518 |
CodePage := CharSetMap[CharSetID].CodePage;
|
519 |
Result := true;
|
520 |
Exit;
|
521 |
end;
|
522 |
|
523 |
for i := 0 to Length(FUserCharSetMap) - 1 do
|
524 |
if FUserCharSetMap[i].CharSetID = CharSetID then
|
525 |
begin
|
526 |
CodePage := FUserCharSetMap[i].CodePage;
|
527 |
Result := true;
|
528 |
Exit;
|
529 |
end;
|
530 |
end;
|
531 |
|
532 |
function TFBAttachment.CodePage2CharSetID(CodePage: TSystemCodePage;
|
533 |
var CharSetID: integer): boolean;
|
534 |
var i: integer;
|
535 |
begin
|
536 |
Result := false;
|
537 |
for i := Low(CharSetMap) to High(CharSetMap) do
|
538 |
if (CharSetMap[i].AllowReverseLookup) and (CharSetMap[i].CodePage = CodePage) then
|
539 |
begin
|
540 |
CharSetID := CharSetMap[i].CharSetID;
|
541 |
Result := true;
|
542 |
Exit;
|
543 |
end;
|
544 |
|
545 |
for i := 0 to Length(FUserCharSetMap) - 1 do
|
546 |
if (FUserCharSetMap[i].AllowReverseLookup) and (FUserCharSetMap[i].CodePage = CodePage) then
|
547 |
begin
|
548 |
CharSetID := FUserCharSetMap[i].CharSetID;
|
549 |
Result := true;
|
550 |
Exit;
|
551 |
end;
|
552 |
end;
|
553 |
|
554 |
function TFBAttachment.CharSetName2CharSetID(CharSetName: AnsiString;
|
555 |
var CharSetID: integer): boolean;
|
556 |
var i: integer;
|
557 |
begin
|
558 |
Result := false;
|
559 |
for i := Low(CharSetMap) to High(CharSetMap) do
|
560 |
if AnsiCompareStr(CharSetMap[i].CharSetName, CharSetName) = 0 then
|
561 |
begin
|
562 |
CharSetID := CharSetMap[i].CharSetID;
|
563 |
Result := true;
|
564 |
Exit;
|
565 |
end;
|
566 |
|
567 |
for i := 0 to Length(FUserCharSetMap) - 1 do
|
568 |
if AnsiCompareStr(FUserCharSetMap[i].CharSetName, CharSetName) = 0 then
|
569 |
begin
|
570 |
CharSetID := FUserCharSetMap[i].CharSetID;
|
571 |
Result := true;
|
572 |
Exit;
|
573 |
end;
|
574 |
end;
|
575 |
|
576 |
function TFBAttachment.CharSetWidth(CharSetID: integer; var Width: integer
|
577 |
): boolean;
|
578 |
var i: integer;
|
579 |
begin
|
580 |
Result := (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap))
|
581 |
and (CharSetMap[CharSetID].CharSetID = CharSetID);
|
582 |
if Result then
|
583 |
begin
|
584 |
Width := CharSetMap[CharSetID].CharSetWidth;
|
585 |
Result := true;
|
586 |
Exit;
|
587 |
end;
|
588 |
|
589 |
for i := 0 to Length(FUserCharSetMap) - 1 do
|
590 |
if FUserCharSetMap[i].CharSetID = CharSetID then
|
591 |
begin
|
592 |
Width := FUserCharSetMap[i].CharSetWidth;
|
593 |
Result := true;
|
594 |
Exit;
|
595 |
end;
|
596 |
end;
|
597 |
|
598 |
const
|
599 |
sqlLookupCharSet = 'Select RDB$CHARACTER_SET_ID, RDB$BYTES_PER_CHARACTER From RDB$CHARACTER_SETS '+
|
600 |
'Where RDB$SYSTEM_FLAG = 0 and RDB$CHARACTER_SET_NAME = UPPER(?)';
|
601 |
|
602 |
procedure TFBAttachment.RegisterCharSet(CharSetName: AnsiString;
|
603 |
CodePage: TSystemCodePage; AllowReverseLookup: boolean; out CharSetID: integer
|
604 |
);
|
605 |
var CharSets: IResultSet;
|
606 |
idx: integer;
|
607 |
begin
|
608 |
if CharSetName2CharSetID(CharSetName,CharSetID) then
|
609 |
IBError(ibxeCharacterSetExists,[CharSetName]);
|
610 |
|
611 |
CharSets := OpenCursorAtStart(sqlLookupCharSet,[CharSetName]);
|
612 |
if CharSets.IsEof then
|
613 |
IBError(ibxeUnknownUserCharSet,[CharSetName]);
|
614 |
|
615 |
idx := Length(FUserCharSetMap);
|
616 |
SetLength(FUserCharSetMap,idx+1);
|
617 |
FUserCharSetMap[idx].AllowReverseLookup := AllowReverseLookup;
|
618 |
FUserCharSetMap[idx].CharSetID := CharSets[0].AsInteger;
|
619 |
FUserCharSetMap[idx].CharSetName := AnsiUpperCase(CharSetName);
|
620 |
FUserCharSetMap[idx].CharSetWidth := CharSets[1].AsInteger;
|
621 |
FUserCharSetMap[idx].CodePage := CodePage;
|
622 |
CharSetID := CharSets[0].AsInteger;
|
623 |
end;
|
624 |
|
625 |
end.
|
626 |
|