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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 FB30Attachment;
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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, FBAttachment, FBClientAPI, FB30ClientAPI, Firebird, IB,
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FBActivityMonitor, FBParamBlock;
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type
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{ TFB30Attachment }
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TFB30Attachment = class(TFBAttachment,IAttachment, IActivityMonitor)
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private
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FAttachmentIntf: Firebird.IAttachment;
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FFirebird30ClientAPI: TFB30ClientAPI;
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FTimeZoneServices: ITimeZoneServices;
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FUsingRemoteICU: boolean;
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FOwnsAttachmentHandle: boolean;
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procedure SetAttachmentIntf(AValue: Firebird.IAttachment);
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procedure SetUseRemoteICU(aValue: boolean);
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protected
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procedure CheckHandle; override;
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function GetAttachment: IAttachment; override;
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public
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constructor Create(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
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RaiseExceptionOnConnectError: boolean); overload;
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constructor Create(api: TFB30ClientAPI;
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attachment: Firebird.IAttachment; aDatabaseName: AnsiString); overload;
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constructor CreateDatabase(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB; RaiseExceptionOnError: boolean); overload;
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constructor CreateDatabase(api: TFB30ClientAPI; sql: AnsiString; aSQLDialect: integer;
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RaiseExceptionOnError: boolean); overload;
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function GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer): IDBInformation;
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override;
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property AttachmentIntf: Firebird.IAttachment read FAttachmentIntf write SetAttachmentIntf;
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property Firebird30ClientAPI: TFB30ClientAPI read FFirebird30ClientAPI;
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public
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{IAttachment}
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procedure Connect;
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procedure Disconnect(Force: boolean=false); override;
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function IsConnected: boolean; override;
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procedure DropDatabase;
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function StartTransaction(TPB: array of byte; DefaultCompletion: TTransactionCompletion; aName: AnsiString=''): ITransaction; override;
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function StartTransaction(TPB: ITPB; DefaultCompletion: TTransactionCompletion; aName: AnsiString=''): ITransaction; override;
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procedure ExecImmediate(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer); override;
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function Prepare(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer; CursorName: AnsiString=''): IStatement; override;
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function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
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aSQLDialect: integer; GenerateParamNames: boolean=false;
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CaseSensitiveParams: boolean=false; CursorName: AnsiString=''): IStatement; override;
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{Events}
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function GetEventHandler(Events: TStrings): IEvents; override;
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{Blob - may use to open existing Blobs. However, ISQLData.AsBlob is preferred}
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function CreateBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BPB: IBPB=nil): IBlob; overload; override;
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function CreateBlob(transaction: ITransaction; SubType: integer; aCharSetID: cardinal=0; BPB: IBPB=nil): IBlob; overload;
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function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload; override;
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{Array}
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function OpenArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData; ArrayID: TISC_QUAD): IArray; overload; override;
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function CreateArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData): IArray; overload; override;
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function CreateArrayMetaData(SQLType: cardinal; tableName: AnsiString;
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columnName: AnsiString; Scale: integer; size: cardinal; aCharSetID: cardinal;
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dimensions: cardinal; bounds: TArrayBounds): IArrayMetaData;
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{Database Information}
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function GetBlobMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IBlobMetaData; override;
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function GetArrayMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IArrayMetaData; override;
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procedure getFBVersion(version: TStrings);
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function HasDecFloatSupport: boolean; override;
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function HasBatchMode: boolean; override;
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function HasScollableCursors: boolean;
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{Time Zone Support}
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function GetTimeZoneServices: ITimeZoneServices; override;
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function HasTimeZoneSupport: boolean; override;
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end;
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implementation
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uses FB30Transaction, FB30Statement, FB30Array, FB30Blob, FBMessages,
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FBOutputBlock, FB30Events, IBUtils, FB30TimeZoneServices;
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type
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{ TVersionCallback }
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TVersionCallback = class(Firebird.IVersionCallbackImpl)
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private
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FOutput: TStrings;
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FFirebirdClientAPI: TFBClientAPI;
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public
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constructor Create(FirebirdClientAPI: TFBClientAPI; output: TStrings);
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procedure callback(status: Firebird.IStatus; text: PAnsiChar); override;
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end;
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{ TVersionCallback }
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constructor TVersionCallback.Create(FirebirdClientAPI: TFBClientAPI;
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output: TStrings);
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begin
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inherited Create;
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FFirebirdClientAPI := FirebirdClientAPI;
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FOutput := output;
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end;
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procedure TVersionCallback.callback(status: Firebird.IStatus; text: PAnsiChar);
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var aStatus: IStatus;
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begin
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aStatus := TFB30Status.Create(FFirebirdClientAPI,status);
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if aStatus.InErrorState then
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raise EIBInterBaseError.Create(aStatus);
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FOutput.Add(text);
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end;
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{ TFB30Attachment }
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procedure TFB30Attachment.SetUseRemoteICU(aValue: boolean);
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begin
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if (FUsingRemoteICU <> aValue) and (GetODSMajorVersion >= 13) then
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begin
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if aValue then
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ExecImmediate([isc_tpb_write,isc_tpb_wait,isc_tpb_concurrency],'SET BIND OF TIME ZONE TO EXTENDED')
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else
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ExecImmediate([isc_tpb_write,isc_tpb_wait,isc_tpb_concurrency],'SET BIND OF TIME ZONE TO NATIVE');
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FUsingRemoteICU := aValue;
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end;
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end;
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procedure TFB30Attachment.SetAttachmentIntf(AValue: Firebird.IAttachment);
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begin
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if FAttachmentIntf = AValue then Exit;
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if FAttachmentIntf <> nil then
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try
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FAttachmentIntf.release;
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except {ignore - forced release}
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end;
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FOwnsAttachmentHandle := false;
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ClearCachedInfo;
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FTimeZoneServices := nil;
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FAttachmentIntf := AValue;
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if FAttachmentIntf <> nil then
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FAttachmentIntf.AddRef;
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end;
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procedure TFB30Attachment.CheckHandle;
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begin
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if FAttachmentIntf = nil then
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IBError(ibxeDatabaseClosed,[nil]);
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end;
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function TFB30Attachment.GetAttachment: IAttachment;
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begin
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Result := self;
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end;
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constructor TFB30Attachment.Create(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
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RaiseExceptionOnConnectError: boolean);
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begin
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FFirebird30ClientAPI := api;
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if aDPB = nil then
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begin
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if RaiseExceptionOnConnectError then
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IBError(ibxeNoDPB,[nil]);
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Exit;
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end;
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inherited Create(api,DatabaseName,aDPB,RaiseExceptionOnConnectError);
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Connect;
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end;
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constructor TFB30Attachment.CreateDatabase(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
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RaiseExceptionOnError: boolean);
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var Param: IDPBItem;
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sql: AnsiString;
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IsCreateDB: boolean;
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Intf: Firebird.IAttachment;
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begin
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inherited Create(api,DatabaseName,aDPB,RaiseExceptionOnError);
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FFirebird30ClientAPI := api;
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IsCreateDB := true;
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if aDPB <> nil then
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begin
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Param := aDPB.Find(isc_dpb_set_db_SQL_dialect);
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if Param <> nil then
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SetSQLDialect(Param.AsByte);
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end;
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sql := GenerateCreateDatabaseSQL(DatabaseName,aDPB);
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with FFirebird30ClientAPI do
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begin
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Intf := UtilIntf.executeCreateDatabase(StatusIntf,Length(sql),
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PAnsiChar(sql),SQLDialect,@IsCreateDB);
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if FRaiseExceptionOnConnectError then Check4DataBaseError;
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if not InErrorState then
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begin
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if aDPB <> nil then
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{Connect using known parameters}
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begin
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Intf.Detach(StatusIntf); {releases interface}
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Check4DataBaseError;
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Connect;
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end
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else
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AttachmentIntf := Intf;
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FOwnsAttachmentHandle:= true;
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end;
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end;
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end;
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constructor TFB30Attachment.CreateDatabase(api: TFB30ClientAPI; sql: AnsiString; aSQLDialect: integer;
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RaiseExceptionOnError: boolean);
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var IsCreateDB: boolean;
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Intf: Firebird.IAttachment;
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begin
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inherited Create(api,'',nil,RaiseExceptionOnError);
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FFirebird30ClientAPI := api;
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SetSQLDialect(aSQLDialect);
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with FFirebird30ClientAPI do
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begin
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Intf := UtilIntf.executeCreateDatabase(StatusIntf,Length(sql),
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PAnsiChar(sql),aSQLDialect,@IsCreateDB);
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if FRaiseExceptionOnConnectError then Check4DataBaseError;
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if InErrorState then
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Exit;
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end;
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AttachmentIntf := Intf;
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FOwnsAttachmentHandle:= true;
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ExtractConnectString(sql,FDatabaseName);
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DPBFromCreateSQL(sql);
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end;
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constructor TFB30Attachment.Create(api: TFB30ClientAPI;
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attachment: Firebird.IAttachment; aDatabaseName: AnsiString);
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begin
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inherited Create(api,aDatabaseName,nil,false);
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FFirebird30ClientAPI := api;
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AttachmentIntf := attachment;
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end;
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function TFB30Attachment.GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer): IDBInformation;
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begin
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Result := TDBInformation.Create(Firebird30ClientAPI);
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with FFirebird30ClientAPI, Result as TDBInformation do
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begin
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FAttachmentIntf.getInfo(StatusIntf, ReqBufLen, BytePtr(ReqBuffer),
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getBufSize, BytePtr(Buffer));
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Check4DataBaseError;
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end
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end;
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procedure TFB30Attachment.Connect;
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var Intf: Firebird.IAttachment;
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begin
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with FFirebird30ClientAPI do
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begin
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Intf := ProviderIntf.attachDatabase(StatusIntf,PAnsiChar(FDatabaseName),
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(DPB as TDPB).getDataLength,
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BytePtr((DPB as TDPB).getBuffer));
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if FRaiseExceptionOnConnectError then Check4DataBaseError;
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if not InErrorState then
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begin
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AttachmentIntf := Intf;
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FOwnsAttachmentHandle := true;
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end;
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end;
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end;
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procedure TFB30Attachment.Disconnect(Force: boolean);
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begin
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if IsConnected then
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begin
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EndAllTransactions;
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if FOwnsAttachmentHandle then
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with FFirebird30ClientAPI do
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begin
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FAttachmentIntf.Detach(StatusIntf);
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if not Force and InErrorState then
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IBDataBaseError;
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end;
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AttachmentIntf := nil;
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end;
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inherited Disconnect(Force);
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end;
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function TFB30Attachment.IsConnected: boolean;
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begin
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Result := FAttachmentIntf <> nil;
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end;
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procedure TFB30Attachment.DropDatabase;
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begin
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if IsConnected then
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begin
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if not FOwnsAttachmentHandle then
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IBError(ibxeCantDropAcquiredDB,[nil]);
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with FFirebird30ClientAPI do
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begin
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EndAllTransactions;
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EndSession(false);
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FAttachmentIntf.dropDatabase(StatusIntf);
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Check4DataBaseError;
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end;
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AttachmentIntf := nil;
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end;
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end;
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function TFB30Attachment.StartTransaction(TPB: array of byte;
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DefaultCompletion: TTransactionCompletion; aName: AnsiString): ITransaction;
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begin
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CheckHandle;
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Result := TFB30Transaction.Create(FFirebird30ClientAPI,self,TPB,DefaultCompletion, aName);
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end;
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function TFB30Attachment.StartTransaction(TPB: ITPB;
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DefaultCompletion: TTransactionCompletion; aName: AnsiString): ITransaction;
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begin
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CheckHandle;
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Result := TFB30Transaction.Create(FFirebird30ClientAPI,self,TPB,DefaultCompletion,aName);
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end;
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procedure TFB30Attachment.ExecImmediate(transaction: ITransaction; sql: AnsiString;
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aSQLDialect: integer);
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begin
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CheckHandle;
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with FFirebird30ClientAPI do
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try
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FAttachmentIntf.execute(StatusIntf,(transaction as TFB30Transaction).TransactionIntf,
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Length(sql),PAnsiChar(sql),aSQLDialect,nil,nil,nil,nil);
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Check4DataBaseError;
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finally
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if JournalingActive and
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((joReadOnlyQueries in GetJournalOptions) or
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(joModifyQueries in GetJournalOptions)) then
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ExecImmediateJnl(sql,transaction);
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end;
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end;
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function TFB30Attachment.Prepare(transaction: ITransaction; sql: AnsiString;
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aSQLDialect: integer; CursorName: AnsiString): IStatement;
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begin
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CheckHandle;
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Result := TFB30Statement.Create(self,transaction,sql,aSQLDialect,CursorName);
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end;
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function TFB30Attachment.PrepareWithNamedParameters(transaction: ITransaction;
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sql: AnsiString; aSQLDialect: integer; GenerateParamNames: boolean;
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CaseSensitiveParams: boolean; CursorName: AnsiString): IStatement;
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begin
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CheckHandle;
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Result := TFB30Statement.CreateWithParameterNames(self,transaction,sql,aSQLDialect,
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GenerateParamNames,CaseSensitiveParams,CursorName);
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end;
|
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function TFB30Attachment.GetEventHandler(Events: TStrings): IEvents;
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begin
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CheckHandle;
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Result := TFB30Events.Create(self,Events);
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end;
|
395 |
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function TFB30Attachment.CreateBlob(transaction: ITransaction;
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BlobMetaData: IBlobMetaData; BPB: IBPB): IBlob;
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begin
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CheckHandle;
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Result := TFB30Blob.Create(self,transaction as TFB30Transaction, BlobMetaData,BPB);
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end;
|
402 |
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function TFB30Attachment.CreateBlob(transaction: ITransaction;
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SubType: integer; aCharSetID: cardinal; BPB: IBPB): IBlob;
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begin
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CheckHandle;
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Result := TFB30Blob.Create(self,transaction as TFB30Transaction, SubType,aCharSetID,BPB);
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end;
|
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function TFB30Attachment.OpenBlob(transaction: ITransaction;
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BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB): IBlob;
|
412 |
begin
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CheckHandle;
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Result := TFB30Blob.Create(self,transaction as TFB30transaction,BlobMetaData,BlobID,BPB);
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end;
|
416 |
|
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function TFB30Attachment.OpenArray(transaction: ITransaction;
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ArrayMetaData: IArrayMetaData; ArrayID: TISC_QUAD): IArray;
|
419 |
begin
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420 |
CheckHandle;
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Result := TFB30Array.Create(self,transaction as TFB30Transaction,
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ArrayMetaData,ArrayID);
|
423 |
end;
|
424 |
|
425 |
function TFB30Attachment.CreateArray(transaction: ITransaction;
|
426 |
ArrayMetaData: IArrayMetaData): IArray;
|
427 |
begin
|
428 |
CheckHandle;
|
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Result := TFB30Array.Create(self,transaction as TFB30Transaction,ArrayMetaData);
|
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end;
|
431 |
|
432 |
function TFB30Attachment.CreateArrayMetaData(SQLType: cardinal; tableName: AnsiString; columnName: AnsiString;
|
433 |
Scale: integer; size: cardinal; aCharSetID: cardinal; dimensions: cardinal;
|
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bounds: TArrayBounds): IArrayMetaData;
|
435 |
begin
|
436 |
Result := TFB30ArrayMetaData.Create(self,SQLType,tableName,ColumnName,Scale,size,aCharSetID, dimensions,bounds);
|
437 |
end;
|
438 |
|
439 |
function TFB30Attachment.GetBlobMetaData(Transaction: ITransaction; tableName,
|
440 |
columnName: AnsiString): IBlobMetaData;
|
441 |
begin
|
442 |
CheckHandle;
|
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Result := TFB30BlobMetaData.Create(self,Transaction as TFB30Transaction,tableName,columnName);
|
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end;
|
445 |
|
446 |
function TFB30Attachment.GetArrayMetaData(Transaction: ITransaction; tableName,
|
447 |
columnName: AnsiString): IArrayMetaData;
|
448 |
begin
|
449 |
CheckHandle;
|
450 |
Result := TFB30ArrayMetaData.Create(self,Transaction as TFB30Transaction,tableName,columnName);
|
451 |
end;
|
452 |
|
453 |
procedure TFB30Attachment.getFBVersion(version: TStrings);
|
454 |
var bufferObj: TVersionCallback;
|
455 |
begin
|
456 |
version.Clear;
|
457 |
bufferObj := TVersionCallback.Create(Firebird30ClientAPI,version);
|
458 |
try
|
459 |
with FFirebird30ClientAPI do
|
460 |
begin
|
461 |
UtilIntf.getFbVersion(StatusIntf,FAttachmentIntf,bufferObj);
|
462 |
Check4DataBaseError;
|
463 |
end;
|
464 |
finally
|
465 |
bufferObj.Free;
|
466 |
end;
|
467 |
end;
|
468 |
|
469 |
function TFB30Attachment.HasDecFloatSupport: boolean;
|
470 |
begin
|
471 |
Result := (FFirebird30ClientAPI.GetClientMajor >= 4) and
|
472 |
(GetODSMajorVersion >= 13);
|
473 |
end;
|
474 |
|
475 |
function TFB30Attachment.HasBatchMode: boolean;
|
476 |
begin
|
477 |
Result := FFirebird30ClientAPI.Firebird4orLater and
|
478 |
(GetODSMajorVersion >= 13);
|
479 |
end;
|
480 |
|
481 |
function TFB30Attachment.HasScollableCursors: boolean;
|
482 |
begin
|
483 |
Result := (GetODSMajorVersion >= 12);
|
484 |
end;
|
485 |
|
486 |
function TFB30Attachment.GetTimeZoneServices: ITimeZoneServices;
|
487 |
begin
|
488 |
if not HasTimeZoneSupport then
|
489 |
IBError(ibxeNotSupported,[]);
|
490 |
|
491 |
if FTimeZoneServices = nil then
|
492 |
FTimeZoneServices := TFB30TimeZoneServices.Create(self);
|
493 |
Result := FTimeZoneServices;
|
494 |
end;
|
495 |
|
496 |
function TFB30Attachment.HasTimeZoneSupport: boolean;
|
497 |
begin
|
498 |
Result := (FFirebird30ClientAPI.GetClientMajor >= 4) and
|
499 |
(GetODSMajorVersion >= 13);
|
500 |
end;
|
501 |
|
502 |
end.
|
503 |
|