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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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{$ENDIF} |
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|
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{$IFDEF FPC} |
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{$mode delphi} |
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{$interfaces COM} |
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{$ENDIF} |
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|
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interface |
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|
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uses |
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Classes, SysUtils, {$IFDEF WINDOWS} windows, {$ENDIF} IB, FBParamBlock, FBActivityMonitor; |
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|
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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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|
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{ TFBAttachment } |
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|
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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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|
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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 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 HasDefaultCharSet: boolean read FHasDefaultCharSet; |
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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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|
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implementation |
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|
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uses FBMessages, FBTransaction; |
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|
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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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|
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|
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|
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|
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{ TFBAttachment } |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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Result := 'CREATE DATABASE ''' + DatabaseName + ''' ' + CreateParams; {do not localize} |
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end; |
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|
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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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|
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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 |
| 272 |
if SQLParams.Count <> Length(params) then |
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IBError(ibxeInvalidParamCount,[SQLParams.Count,Length(params)]); |
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|
| 275 |
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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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 := params[i].VString^; |
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vtPChar : |
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SQLParams[i].AsString := strpas(params[i].VPChar); |
| 292 |
vtAnsiString : |
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SQLParams[i].AsString := AnsiString(params[i].VAnsiString^); |
| 294 |
vtVariant: |
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SQLParams[i].AsVariant := params[i].VVariant^; |
| 296 |
else |
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IBError(ibxeInvalidVariantType,[nil]); |
| 298 |
end; |
| 299 |
end; |
| 300 |
end; |
| 301 |
|
| 302 |
destructor TFBAttachment.Destroy; |
| 303 |
begin |
| 304 |
Disconnect(true); |
| 305 |
inherited Destroy; |
| 306 |
end; |
| 307 |
|
| 308 |
function TFBAttachment.getDPB: IDPB; |
| 309 |
begin |
| 310 |
Result := FDPB; |
| 311 |
end; |
| 312 |
|
| 313 |
function TFBAttachment.AllocateBPB: IBPB; |
| 314 |
begin |
| 315 |
Result := TBPB.Create; |
| 316 |
end; |
| 317 |
|
| 318 |
procedure TFBAttachment.ExecImmediate(TPB: array of byte; sql: AnsiString; |
| 319 |
aSQLDialect: integer); |
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begin |
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ExecImmediate(StartTransaction(TPB,taCommit),sql,aSQLDialect); |
| 322 |
end; |
| 323 |
|
| 324 |
procedure TFBAttachment.ExecImmediate(transaction: ITransaction; sql: AnsiString); |
| 325 |
begin |
| 326 |
ExecImmediate(transaction,sql,FSQLDialect); |
| 327 |
end; |
| 328 |
|
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procedure TFBAttachment.ExecImmediate(TPB: array of byte; sql: AnsiString); |
| 330 |
begin |
| 331 |
ExecImmediate(StartTransaction(TPB,taCommit),sql,FSQLDialect); |
| 332 |
end; |
| 333 |
|
| 334 |
function TFBAttachment.ExecuteSQL(TPB: array of byte; sql: AnsiString; |
| 335 |
SQLDialect: integer; params: array of const): IResults; |
| 336 |
begin |
| 337 |
Result := ExecuteSQL(StartTransaction(TPB,taCommit),sql,FSQLDialect,params); |
| 338 |
end; |
| 339 |
|
| 340 |
function TFBAttachment.ExecuteSQL(transaction: ITransaction; sql: AnsiString; |
| 341 |
SQLDialect: integer; params: array of const): IResults; |
| 342 |
begin |
| 343 |
with Prepare(transaction,sql,SQLDialect) do |
| 344 |
begin |
| 345 |
SetParameters(SQLParams,params); |
| 346 |
Result := Execute; |
| 347 |
end; |
| 348 |
end; |
| 349 |
|
| 350 |
function TFBAttachment.ExecuteSQL(TPB: array of byte; sql: AnsiString; |
| 351 |
params: array of const): IResults; |
| 352 |
begin |
| 353 |
Result := ExecuteSQL(StartTransaction(TPB,taCommit),sql,params); |
| 354 |
end; |
| 355 |
|
| 356 |
function TFBAttachment.ExecuteSQL(transaction: ITransaction; sql: AnsiString; |
| 357 |
params: array of const): IResults; |
| 358 |
begin |
| 359 |
with Prepare(transaction,sql,FSQLDialect) do |
| 360 |
begin |
| 361 |
SetParameters(SQLParams,params); |
| 362 |
Result := Execute; |
| 363 |
end; |
| 364 |
end; |
| 365 |
|
| 366 |
function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString; |
| 367 |
aSQLDialect: integer): IResultSet; |
| 368 |
begin |
| 369 |
Result := OpenCursor(transaction,sql,aSQLDialect,[]); |
| 370 |
end; |
| 371 |
|
| 372 |
function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString; |
| 373 |
aSQLDialect: integer; params: array of const): IResultSet; |
| 374 |
var Statement: IStatement; |
| 375 |
begin |
| 376 |
CheckHandle; |
| 377 |
Statement := Prepare(transaction,sql,aSQLDialect); |
| 378 |
SetParameters(Statement.SQLParams,params); |
| 379 |
Result := Statement.OpenCursor; |
| 380 |
end; |
| 381 |
|
| 382 |
function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString |
| 383 |
): IResultSet; |
| 384 |
begin |
| 385 |
Result := OpenCursor(transaction,sql,FSQLDialect,[]); |
| 386 |
end; |
| 387 |
|
| 388 |
function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString; |
| 389 |
params: array of const): IResultSet; |
| 390 |
begin |
| 391 |
Result := OpenCursor(transaction,sql,FSQLDialect,params); |
| 392 |
end; |
| 393 |
|
| 394 |
function TFBAttachment.OpenCursorAtStart(transaction: ITransaction; |
| 395 |
sql: AnsiString; aSQLDialect: integer): IResultSet; |
| 396 |
begin |
| 397 |
Result := OpenCursor(transaction,sql,aSQLDialect,[]); |
| 398 |
Result.FetchNext; |
| 399 |
end; |
| 400 |
|
| 401 |
function TFBAttachment.OpenCursorAtStart(transaction: ITransaction; |
| 402 |
sql: AnsiString; aSQLDialect: integer; params: array of const): IResultSet; |
| 403 |
begin |
| 404 |
Result := OpenCursor(transaction,sql,aSQLDialect,params); |
| 405 |
Result.FetchNext; |
| 406 |
end; |
| 407 |
|
| 408 |
function TFBAttachment.OpenCursorAtStart(transaction: ITransaction; sql: AnsiString |
| 409 |
): IResultSet; |
| 410 |
begin |
| 411 |
Result := OpenCursorAtStart(transaction,sql,FSQLDialect,[]); |
| 412 |
end; |
| 413 |
|
| 414 |
function TFBAttachment.OpenCursorAtStart(transaction: ITransaction; |
| 415 |
sql: AnsiString; params: array of const): IResultSet; |
| 416 |
begin |
| 417 |
Result := OpenCursorAtStart(transaction,sql,FSQLDialect,params); |
| 418 |
end; |
| 419 |
|
| 420 |
function TFBAttachment.OpenCursorAtStart(sql: AnsiString): IResultSet; |
| 421 |
begin |
| 422 |
Result := OpenCursorAtStart(sql,[]); |
| 423 |
end; |
| 424 |
|
| 425 |
function TFBAttachment.OpenCursorAtStart(sql: AnsiString; |
| 426 |
params: array of const): IResultSet; |
| 427 |
begin |
| 428 |
Result := OpenCursorAtStart(StartTransaction([isc_tpb_read,isc_tpb_wait,isc_tpb_concurrency],taCommit),sql,FSQLDialect,params); |
| 429 |
end; |
| 430 |
|
| 431 |
function TFBAttachment.Prepare(transaction: ITransaction; sql: AnsiString |
| 432 |
): IStatement; |
| 433 |
begin |
| 434 |
Result := Prepare(transaction,sql,FSQLDialect); |
| 435 |
end; |
| 436 |
|
| 437 |
function TFBAttachment.PrepareWithNamedParameters(transaction: ITransaction; |
| 438 |
sql: AnsiString; GenerateParamNames: boolean): IStatement; |
| 439 |
begin |
| 440 |
Result := PrepareWithNamedParameters(transaction,sql,FSQLDialect,GenerateParamNames); |
| 441 |
end; |
| 442 |
|
| 443 |
function TFBAttachment.GetEventHandler(Event: AnsiString): IEvents; |
| 444 |
var S: TStringList; |
| 445 |
begin |
| 446 |
S := TStringList.Create; |
| 447 |
try |
| 448 |
S.Add(Event); |
| 449 |
Result := GetEventHandler(S); |
| 450 |
finally |
| 451 |
S.Free; |
| 452 |
end; |
| 453 |
end; |
| 454 |
|
| 455 |
function TFBAttachment.GetSQLDialect: integer; |
| 456 |
begin |
| 457 |
Result := FSQLDialect; |
| 458 |
end; |
| 459 |
|
| 460 |
function TFBAttachment.OpenBlob(transaction: ITransaction; Field: ISQLData; |
| 461 |
BPB: IBPB): IBlob; |
| 462 |
begin |
| 463 |
Result := OpenBlob(Transaction,Field.GetBlobMetadata, Field.AsQuad,BPB); |
| 464 |
end; |
| 465 |
|
| 466 |
function TFBAttachment.GetCharsetName(CharSetID: integer): AnsiString; |
| 467 |
var i: integer; |
| 468 |
begin |
| 469 |
Result := ''; |
| 470 |
if (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap)) and |
| 471 |
(CharSetMap[CharSetID].CharSetID = CharSetID) then |
| 472 |
begin |
| 473 |
Result := CharSetMap[CharSetID].CharSetName; |
| 474 |
Exit; |
| 475 |
end; |
| 476 |
|
| 477 |
for i := 0 to Length(FUserCharSetMap) - 1 do |
| 478 |
if FUserCharSetMap[i].CharSetID = CharSetID then |
| 479 |
begin |
| 480 |
Result := FUserCharSetMap[i].CharSetName; |
| 481 |
Exit; |
| 482 |
end; |
| 483 |
end; |
| 484 |
|
| 485 |
function TFBAttachment.CharSetID2CodePage(CharSetID: integer; |
| 486 |
var CodePage: TSystemCodePage): boolean; |
| 487 |
var i: integer; |
| 488 |
begin |
| 489 |
Result := (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap)) |
| 490 |
and (CharSetMap[CharSetID].CharSetID = CharSetID); |
| 491 |
if Result then |
| 492 |
begin |
| 493 |
CodePage := CharSetMap[CharSetID].CodePage; |
| 494 |
Result := true; |
| 495 |
Exit; |
| 496 |
end; |
| 497 |
|
| 498 |
for i := 0 to Length(FUserCharSetMap) - 1 do |
| 499 |
if FUserCharSetMap[i].CharSetID = CharSetID then |
| 500 |
begin |
| 501 |
CodePage := FUserCharSetMap[i].CodePage; |
| 502 |
Result := true; |
| 503 |
Exit; |
| 504 |
end; |
| 505 |
end; |
| 506 |
|
| 507 |
function TFBAttachment.CodePage2CharSetID(CodePage: TSystemCodePage; |
| 508 |
var CharSetID: integer): boolean; |
| 509 |
var i: integer; |
| 510 |
begin |
| 511 |
Result := false; |
| 512 |
for i := Low(CharSetMap) to High(CharSetMap) do |
| 513 |
if (CharSetMap[i].AllowReverseLookup) and (CharSetMap[i].CodePage = CodePage) then |
| 514 |
begin |
| 515 |
CharSetID := CharSetMap[i].CharSetID; |
| 516 |
Result := true; |
| 517 |
Exit; |
| 518 |
end; |
| 519 |
|
| 520 |
for i := 0 to Length(FUserCharSetMap) - 1 do |
| 521 |
if (FUserCharSetMap[i].AllowReverseLookup) and (FUserCharSetMap[i].CodePage = CodePage) then |
| 522 |
begin |
| 523 |
CharSetID := FUserCharSetMap[i].CharSetID; |
| 524 |
Result := true; |
| 525 |
Exit; |
| 526 |
end; |
| 527 |
end; |
| 528 |
|
| 529 |
function TFBAttachment.CharSetName2CharSetID(CharSetName: AnsiString; |
| 530 |
var CharSetID: integer): boolean; |
| 531 |
var i: integer; |
| 532 |
begin |
| 533 |
Result := false; |
| 534 |
for i := Low(CharSetMap) to High(CharSetMap) do |
| 535 |
if AnsiCompareStr(CharSetMap[i].CharSetName, CharSetName) = 0 then |
| 536 |
begin |
| 537 |
CharSetID := CharSetMap[i].CharSetID; |
| 538 |
Result := true; |
| 539 |
Exit; |
| 540 |
end; |
| 541 |
|
| 542 |
for i := 0 to Length(FUserCharSetMap) - 1 do |
| 543 |
if AnsiCompareStr(FUserCharSetMap[i].CharSetName, CharSetName) = 0 then |
| 544 |
begin |
| 545 |
CharSetID := FUserCharSetMap[i].CharSetID; |
| 546 |
Result := true; |
| 547 |
Exit; |
| 548 |
end; |
| 549 |
end; |
| 550 |
|
| 551 |
function TFBAttachment.CharSetWidth(CharSetID: integer; var Width: integer |
| 552 |
): boolean; |
| 553 |
var i: integer; |
| 554 |
begin |
| 555 |
Result := (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap)) |
| 556 |
and (CharSetMap[CharSetID].CharSetID = CharSetID); |
| 557 |
if Result then |
| 558 |
begin |
| 559 |
Width := CharSetMap[CharSetID].CharSetWidth; |
| 560 |
Result := true; |
| 561 |
Exit; |
| 562 |
end; |
| 563 |
|
| 564 |
for i := 0 to Length(FUserCharSetMap) - 1 do |
| 565 |
if FUserCharSetMap[i].CharSetID = CharSetID then |
| 566 |
begin |
| 567 |
Width := FUserCharSetMap[i].CharSetWidth; |
| 568 |
Result := true; |
| 569 |
Exit; |
| 570 |
end; |
| 571 |
end; |
| 572 |
|
| 573 |
const |
| 574 |
sqlLookupCharSet = 'Select RDB$CHARACTER_SET_ID, RDB$BYTES_PER_CHARACTER From RDB$CHARACTER_SETS '+ |
| 575 |
'Where RDB$SYSTEM_FLAG = 0 and RDB$CHARACTER_SET_NAME = UPPER(?)'; |
| 576 |
|
| 577 |
procedure TFBAttachment.RegisterCharSet(CharSetName: AnsiString; |
| 578 |
CodePage: TSystemCodePage; AllowReverseLookup: boolean; out CharSetID: integer |
| 579 |
); |
| 580 |
var CharSets: IResultSet; |
| 581 |
idx: integer; |
| 582 |
begin |
| 583 |
if CharSetName2CharSetID(CharSetName,CharSetID) then |
| 584 |
IBError(ibxeCharacterSetExists,[CharSetName]); |
| 585 |
|
| 586 |
CharSets := OpenCursorAtStart(sqlLookupCharSet,[CharSetName]); |
| 587 |
if CharSets.IsEof then |
| 588 |
IBError(ibxeUnknownUserCharSet,[CharSetName]); |
| 589 |
|
| 590 |
idx := Length(FUserCharSetMap); |
| 591 |
SetLength(FUserCharSetMap,idx+1); |
| 592 |
FUserCharSetMap[idx].AllowReverseLookup := AllowReverseLookup; |
| 593 |
FUserCharSetMap[idx].CharSetID := CharSets[0].AsInteger; |
| 594 |
FUserCharSetMap[idx].CharSetName := AnsiUpperCase(CharSetName); |
| 595 |
FUserCharSetMap[idx].CharSetWidth := CharSets[1].AsInteger; |
| 596 |
FUserCharSetMap[idx].CodePage := CodePage; |
| 597 |
CharSetID := CharSets[0].AsInteger; |
| 598 |
end; |
| 599 |
|
| 600 |
end. |
| 601 |
|
