client/2.5/FB25Attachment.pas

(*
 *  Firebird Interface (fbintf). The fbintf components provide a set of
 *  Pascal language bindings for the Firebird API.
 *
 *  The contents of this file are subject to the Initial Developer's
 *  Public License Version 1.0 (the "License"); you may not use this
 *  file except in compliance with the License. You may obtain a copy
 *  of the License here:
 *
 *    http://www.firebirdsql.org/index.php?op=doc&id=idpl
 *
 *  Software distributed under the License is distributed on an "AS
 *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 *  implied. See the License for the specific language governing rights
 *  and limitations under the License.
 *
 *  The Initial Developer of the Original Code is Tony Whyman.
 *
 *  The Original Code is (C) 2016 Tony Whyman, MWA Software
 *  (http://www.mwasoftware.co.uk).
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): ______________________________________.
 *
*)
unit FB25Attachment;

{$IFDEF FPC}
{$mode objfpc}{$H+}
{$interfaces COM}
{$ENDIF}

interface

uses
  Classes, SysUtils, IB,  FBAttachment, FB25ClientAPI, IBHeader,
  FBParamBlock, FBOutputBlock, FBActivityMonitor;

type
  { TFB25Attachment }

  TFB25Attachment = class(TFBAttachment, IAttachment, IActivityMonitor)
  private
    FHandle: TISC_DB_HANDLE;
  protected
    procedure CheckHandle; override;
  public
    constructor Create(DatabaseName: string; aDPB: IDPB;
      RaiseExceptionOnConnectError: boolean);
    constructor CreateDatabase(DatabaseName: string; aDPB: IDPB; RaiseExceptionOnError: boolean);
    property Handle: TISC_DB_HANDLE read FHandle;

  public
    {IAttachment}
    procedure Connect;
    procedure Disconnect(Force: boolean=false); override;
    function IsConnected: boolean;
    procedure DropDatabase;
    function StartTransaction(TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction; override;
    function StartTransaction(TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction; override;
    procedure ExecImmediate(transaction: ITransaction; sql: string; aSQLDialect: integer); override;
    function Prepare(transaction: ITransaction; sql: string; aSQLDialect: integer): IStatement; override;
    function PrepareWithNamedParameters(transaction: ITransaction; sql: string;
                       aSQLDialect: integer; GenerateParamNames: boolean=false): IStatement; override;
    function GetEventHandler(Events: TStrings): IEvents; override;
    function CreateBlob(transaction: ITransaction; RelationName, ColumnName: string; BPB: IBPB=nil): IBlob; overload;
    function CreateBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BPB: IBPB=nil): IBlob; overload;
    function CreateBlob(transaction: ITransaction; SubType: integer; aCharSetID: cardinal=0; BPB: IBPB=nil): IBlob; overload;
    function OpenBlob(transaction: ITransaction; RelationName, ColumnName: string; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload;
    function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; override; overload;

    function OpenArray(transaction: ITransaction; RelationName, ColumnName: string;
      ArrayID: TISC_QUAD): IArray;
    function CreateArray(transaction: ITransaction; RelationName, ColumnName: string
      ): IArray; overload;
    function CreateArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData): IArray; overload;

    {Database Information}

    function GetBlobMetaData(Transaction: ITransaction; tableName, columnName: string): IBlobMetaData;
    function GetArrayMetaData(Transaction: ITransaction; tableName, columnName: string): IArrayMetaData;
    function GetDBInformation(Requests: array of byte): IDBInformation; overload;
    function GetDBInformation(Request: byte): IDBInformation; overload;
  end;

implementation

uses FB25Events,FB25Transaction, FBMessages, FB25Blob,
  FB25Statement, FB25Array;

  { TFB25Attachment }

procedure TFB25Attachment.CheckHandle;
begin
  if FHandle = nil then
    IBError(ibxeDatabaseClosed,[nil]);
end;

constructor TFB25Attachment.Create(DatabaseName: string; aDPB: IDPB;
  RaiseExceptionOnConnectError: boolean);
begin
  if aDPB = nil then
  begin
    if RaiseExceptionOnConnectError then
       IBError(ibxeNoDPB,[nil]);
    Exit;
  end;
  inherited Create(DatabaseName,aDPB,RaiseExceptionOnConnectError);
  Connect;
end;

constructor TFB25Attachment.CreateDatabase(DatabaseName: string; aDPB: IDPB;
  RaiseExceptionOnError: boolean);
var sql: string;
    tr_handle: TISC_TR_HANDLE;
begin
  inherited Create(DatabaseName,aDPB,RaiseExceptionOnError);
  sql := GenerateCreateDatabaseSQL(DatabaseName,aDPB);
  tr_handle := nil;
  with Firebird25ClientAPI do
  if (isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0, PChar(sql),
                                  SQLDialect, nil) > 0) and RaiseExceptionOnError then
    IBDataBaseError;
  if DPB <> nil then
  {Connect using known parameters}
  begin
    Disconnect;
    Connect;
  end;
end;

procedure TFB25Attachment.Connect;
var Param: IDPBItem;
begin
  FSQLDialect := 3;

  with Firebird25ClientAPI do
  if DPB = nil then
  begin
    if (isc_attach_database(StatusVector, Length(FDatabaseName),
                        PChar(FDatabaseName), @FHandle, 0, nil) > 0) and FRaiseExceptionOnConnectError then
      IBDatabaseError;
  end
  else
  begin
    if (isc_attach_database(StatusVector, Length(FDatabaseName),
                         PChar(FDatabaseName), @FHandle,
                         (DPB as TDPB).getDataLength,
                         (DPB as TDPB).getBuffer) > 0 ) and FRaiseExceptionOnConnectError then
      IBDatabaseError;

    if IsConnected then
    begin
     Param := DPB.Find(isc_dpb_set_db_SQL_dialect);
     if Param <> nil then
       FSQLDialect := Param.AsByte;
     Param :=  DPB.Find(isc_dpb_lc_ctype);
     FHasDefaultCharSet :=  (Param <> nil) and
                             CharSetName2CharSetID(Param.AsString,FCharSetID) and
                             CharSetID2CodePage(FCharSetID,FCodePage) and
                             (FCharSetID > 1);
    end;
  end;
end;

procedure TFB25Attachment.Disconnect(Force: boolean);
begin
  if FHandle = nil then
    Exit;

  EndAllTransactions;
  {Disconnect}
  with Firebird25ClientAPI do
    if (isc_detach_database(StatusVector, @FHandle) > 0) and not Force then
      IBDatabaseError;
  FHandle := nil;
  FHasDefaultCharSet := false;
  FCodePage := CP_NONE;
  FCharSetID := 0;
end;

function TFB25Attachment.IsConnected: boolean;
begin
  Result := FHandle <> nil;
end;

procedure TFB25Attachment.DropDatabase;
begin
  CheckHandle;
  EndAllTransactions;
  with Firebird25ClientAPI do
    if isc_drop_database(StatusVector, @FHandle) > 0 then
      IBDatabaseError;
  FHandle := nil;
end;

function TFB25Attachment.StartTransaction(TPB: array of byte;
  DefaultCompletion: TTransactionCompletion): ITransaction;
begin
  CheckHandle;
  Result := TFB25Transaction.Create(self,TPB,DefaultCompletion);
end;

function TFB25Attachment.StartTransaction(TPB: ITPB;
  DefaultCompletion: TTransactionCompletion): ITransaction;
begin
  CheckHandle;
  Result := TFB25Transaction.Create(self,TPB,DefaultCompletion);
end;

function TFB25Attachment.CreateBlob(transaction: ITransaction; RelationName,
  ColumnName: string; BPB: IBPB): IBlob;
begin
  CheckHandle;
  Result := TFB25Blob.Create(self,transaction as TFB25transaction,
                TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,RelationName,ColumnName),BPB);
end;

function TFB25Attachment.CreateBlob(transaction: ITransaction;
  BlobMetaData: IBlobMetaData; BPB: IBPB): IBlob;
begin
  CheckHandle;
  Result := TFB25Blob.Create(self,transaction as TFB25transaction,BlobMetaData,BPB);
end;

function TFB25Attachment.CreateBlob(transaction: ITransaction;
  SubType: integer; aCharSetID: cardinal; BPB: IBPB): IBlob;
begin
  CheckHandle;
  Result := TFB25Blob.Create(self,transaction as TFB25transaction,SubType,aCharSetID,BPB);
end;

function TFB25Attachment.OpenBlob(transaction: ITransaction; RelationName,
  ColumnName: string; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob;
begin
  CheckHandle;
  Result := TFB25Blob.Create(self,transaction as TFB25transaction,
                TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,RelationName,ColumnName),
                BlobID,BPB);
end;

function TFB25Attachment.OpenBlob(transaction: ITransaction;
  BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob;
begin
  CheckHandle;
  Result :=  TFB25Blob.Create(self,transaction as TFB25transaction,BlobMetaData,BlobID,BPB);
end;

procedure TFB25Attachment.ExecImmediate(transaction: ITransaction; sql: string;
  aSQLDialect: integer);
var TRHandle: TISC_TR_HANDLE;
begin
  CheckHandle;
  TRHandle := (Transaction as TFB25Transaction).Handle;
  with Firebird25ClientAPI do
    if isc_dsql_execute_immediate(StatusVector, @fHandle, @TRHandle, 0,PChar(sql), aSQLDialect, nil) > 0 then
      IBDatabaseError;
  SignalActivity;
end;

function TFB25Attachment.Prepare(transaction: ITransaction; sql: string;
  aSQLDialect: integer): IStatement;
begin
  CheckHandle;
  Result := TFB25Statement.Create(self,transaction,sql,aSQLDialect);
end;

function TFB25Attachment.PrepareWithNamedParameters(transaction: ITransaction;
  sql: string; aSQLDialect: integer; GenerateParamNames: boolean): IStatement;
begin
  CheckHandle;
  Result := TFB25Statement.CreateWithParameterNames(self,transaction,sql,aSQLDialect,
         GenerateParamNames);
end;

function TFB25Attachment.GetEventHandler(Events: TStrings): IEvents;
begin
  CheckHandle;
  Result := TFB25Events.Create(self,Events);
end;

function TFB25Attachment.OpenArray(transaction: ITransaction; RelationName, ColumnName: string;
  ArrayID: TISC_QUAD): IArray;
begin
  CheckHandle;
  Result := TFB25Array.Create(self,transaction as TFB25Transaction,
                    GetArrayMetaData(transaction,RelationName,ColumnName),ArrayID);
end;

function TFB25Attachment.CreateArray(transaction: ITransaction; RelationName, ColumnName: string): IArray;
begin
  CheckHandle;
  Result := TFB25Array.Create(self,transaction as TFB25Transaction,
                    GetArrayMetaData(transaction,RelationName,ColumnName));
end;

function TFB25Attachment.CreateArray(transaction: ITransaction;
  ArrayMetaData: IArrayMetaData): IArray;
begin
  CheckHandle;
  Result := TFB25Array.Create(self,transaction as TFB25Transaction,ArrayMetaData);
end;

function TFB25Attachment.GetBlobMetaData(Transaction: ITransaction; tableName,
  columnName: string): IBlobMetaData;
begin
  CheckHandle;
  Result := TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,tableName,columnName);
end;

function TFB25Attachment.GetArrayMetaData(Transaction: ITransaction; tableName,
  columnName: string): IArrayMetaData;
begin
  CheckHandle;
  Result := TFB25ArrayMetaData.Create(self,Transaction as TFB25Transaction,tableName,columnName);
end;

function TFB25Attachment.GetDBInformation(Requests: array of byte
  ): IDBInformation;
var ReqBuffer: PByte;
    i: integer;
begin
  CheckHandle;
  if Length(Requests) = 1 then
    Result := GetDBInformation(Requests[0])
  else
  begin
    Result := TDBInformation.Create;
    GetMem(ReqBuffer,Length(Requests));
    try
      for i := 0 to Length(Requests) - 1 do
        ReqBuffer[i] := Requests[i];

      with Firebird25ClientAPI, Result as TDBInformation do
          if isc_database_info(StatusVector, @(FHandle), Length(Requests), PChar(ReqBuffer),
                                 getBufSize, Buffer) > 0 then
            IBDataBaseError;

    finally
      FreeMem(ReqBuffer);
    end;
  end;
end;

function TFB25Attachment.GetDBInformation(Request: byte): IDBInformation;
begin
  CheckHandle;
  Result := TDBInformation.Create;
  with Firebird25ClientAPI, Result as TDBInformation do
    if isc_database_info(StatusVector, @(FHandle), 1, @Request,
                           getBufSize, Buffer) > 0 then
      IBDataBaseError;
end;

end.

Revision:	45
Committed:	Tue Dec 6 10:33:46 2016 UTC (7 years, 4 months ago) by tony
Content type:	text/x-pascal
Original Path:	*ibx/trunk/fbintf/client/2.5/FB25Attachment.pas*
File size:	11991 byte(s)
Log Message:	Committing updates for Release R2-0-0
#	User	Rev	Content
1	tony	45	(*
2			* Firebird Interface (fbintf). The fbintf components provide a set of
3			* Pascal language bindings for the Firebird API.
4			*
5			* The contents of this file are subject to the Initial Developer's
6			* Public License Version 1.0 (the "License"); you may not use this
7			* file except in compliance with the License. You may obtain a copy
8			* of the License here:
9			*
10			* http://www.firebirdsql.org/index.php?op=doc&id=idpl
11			*
12			* Software distributed under the License is distributed on an "AS
13			* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
14			* implied. See the License for the specific language governing rights
15			* and limitations under the License.
16			*
17			* The Initial Developer of the Original Code is Tony Whyman.
18			*
19			* The Original Code is (C) 2016 Tony Whyman, MWA Software
20			* (http://www.mwasoftware.co.uk).
21			*
22			* All Rights Reserved.
23			*
24			* Contributor(s): ______________________________________.
25			*
26			*)
27			unit FB25Attachment;
28
29			{$IFDEF FPC}
30			{$mode objfpc}{$H+}
31			{$interfaces COM}
32			{$ENDIF}
33
34			interface
35
36			uses
37			Classes, SysUtils, IB, FBAttachment, FB25ClientAPI, IBHeader,
38			FBParamBlock, FBOutputBlock, FBActivityMonitor;
39
40			type
41			{ TFB25Attachment }
42
43			TFB25Attachment = class(TFBAttachment, IAttachment, IActivityMonitor)
44			private
45			FHandle: TISC_DB_HANDLE;
46			protected
47			procedure CheckHandle; override;
48			public
49			constructor Create(DatabaseName: string; aDPB: IDPB;
50			RaiseExceptionOnConnectError: boolean);
51			constructor CreateDatabase(DatabaseName: string; aDPB: IDPB; RaiseExceptionOnError: boolean);
52			property Handle: TISC_DB_HANDLE read FHandle;
53
54			public
55			{IAttachment}
56			procedure Connect;
57			procedure Disconnect(Force: boolean=false); override;
58			function IsConnected: boolean;
59			procedure DropDatabase;
60			function StartTransaction(TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction; override;
61			function StartTransaction(TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction; override;
62			procedure ExecImmediate(transaction: ITransaction; sql: string; aSQLDialect: integer); override;
63			function Prepare(transaction: ITransaction; sql: string; aSQLDialect: integer): IStatement; override;
64			function PrepareWithNamedParameters(transaction: ITransaction; sql: string;
65			aSQLDialect: integer; GenerateParamNames: boolean=false): IStatement; override;
66			function GetEventHandler(Events: TStrings): IEvents; override;
67			function CreateBlob(transaction: ITransaction; RelationName, ColumnName: string; BPB: IBPB=nil): IBlob; overload;
68			function CreateBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BPB: IBPB=nil): IBlob; overload;
69			function CreateBlob(transaction: ITransaction; SubType: integer; aCharSetID: cardinal=0; BPB: IBPB=nil): IBlob; overload;
70			function OpenBlob(transaction: ITransaction; RelationName, ColumnName: string; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload;
71			function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; override; overload;
72
73			function OpenArray(transaction: ITransaction; RelationName, ColumnName: string;
74			ArrayID: TISC_QUAD): IArray;
75			function CreateArray(transaction: ITransaction; RelationName, ColumnName: string
76			): IArray; overload;
77			function CreateArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData): IArray; overload;
78
79			{Database Information}
80
81			function GetBlobMetaData(Transaction: ITransaction; tableName, columnName: string): IBlobMetaData;
82			function GetArrayMetaData(Transaction: ITransaction; tableName, columnName: string): IArrayMetaData;
83			function GetDBInformation(Requests: array of byte): IDBInformation; overload;
84			function GetDBInformation(Request: byte): IDBInformation; overload;
85			end;
86
87			implementation
88
89			uses FB25Events,FB25Transaction, FBMessages, FB25Blob,
90			FB25Statement, FB25Array;
91
92			{ TFB25Attachment }
93
94			procedure TFB25Attachment.CheckHandle;
95			begin
96			if FHandle = nil then
97			IBError(ibxeDatabaseClosed,[nil]);
98			end;
99
100			constructor TFB25Attachment.Create(DatabaseName: string; aDPB: IDPB;
101			RaiseExceptionOnConnectError: boolean);
102			begin
103			if aDPB = nil then
104			begin
105			if RaiseExceptionOnConnectError then
106			IBError(ibxeNoDPB,[nil]);
107			Exit;
108			end;
109			inherited Create(DatabaseName,aDPB,RaiseExceptionOnConnectError);
110			Connect;
111			end;
112
113			constructor TFB25Attachment.CreateDatabase(DatabaseName: string; aDPB: IDPB;
114			RaiseExceptionOnError: boolean);
115			var sql: string;
116			tr_handle: TISC_TR_HANDLE;
117			begin
118			inherited Create(DatabaseName,aDPB,RaiseExceptionOnError);
119			sql := GenerateCreateDatabaseSQL(DatabaseName,aDPB);
120			tr_handle := nil;
121			with Firebird25ClientAPI do
122			if (isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0, PChar(sql),
123			SQLDialect, nil) > 0) and RaiseExceptionOnError then
124			IBDataBaseError;
125			if DPB <> nil then
126			{Connect using known parameters}
127			begin
128			Disconnect;
129			Connect;
130			end;
131			end;
132
133			procedure TFB25Attachment.Connect;
134			var Param: IDPBItem;
135			begin
136			FSQLDialect := 3;
137
138			with Firebird25ClientAPI do
139			if DPB = nil then
140			begin
141			if (isc_attach_database(StatusVector, Length(FDatabaseName),
142			PChar(FDatabaseName), @FHandle, 0, nil) > 0) and FRaiseExceptionOnConnectError then
143			IBDatabaseError;
144			end
145			else
146			begin
147			if (isc_attach_database(StatusVector, Length(FDatabaseName),
148			PChar(FDatabaseName), @FHandle,
149			(DPB as TDPB).getDataLength,
150			(DPB as TDPB).getBuffer) > 0 ) and FRaiseExceptionOnConnectError then
151			IBDatabaseError;
152
153			if IsConnected then
154			begin
155			Param := DPB.Find(isc_dpb_set_db_SQL_dialect);
156			if Param <> nil then
157			FSQLDialect := Param.AsByte;
158			Param := DPB.Find(isc_dpb_lc_ctype);
159			FHasDefaultCharSet := (Param <> nil) and
160			CharSetName2CharSetID(Param.AsString,FCharSetID) and
161			CharSetID2CodePage(FCharSetID,FCodePage) and
162			(FCharSetID > 1);
163			end;
164			end;
165			end;
166
167			procedure TFB25Attachment.Disconnect(Force: boolean);
168			begin
169			if FHandle = nil then
170			Exit;
171
172			EndAllTransactions;
173			{Disconnect}
174			with Firebird25ClientAPI do
175			if (isc_detach_database(StatusVector, @FHandle) > 0) and not Force then
176			IBDatabaseError;
177			FHandle := nil;
178			FHasDefaultCharSet := false;
179			FCodePage := CP_NONE;
180			FCharSetID := 0;
181			end;
182
183			function TFB25Attachment.IsConnected: boolean;
184			begin
185			Result := FHandle <> nil;
186			end;
187
188			procedure TFB25Attachment.DropDatabase;
189			begin
190			CheckHandle;
191			EndAllTransactions;
192			with Firebird25ClientAPI do
193			if isc_drop_database(StatusVector, @FHandle) > 0 then
194			IBDatabaseError;
195			FHandle := nil;
196			end;
197
198			function TFB25Attachment.StartTransaction(TPB: array of byte;
199			DefaultCompletion: TTransactionCompletion): ITransaction;
200			begin
201			CheckHandle;
202			Result := TFB25Transaction.Create(self,TPB,DefaultCompletion);
203			end;
204
205			function TFB25Attachment.StartTransaction(TPB: ITPB;
206			DefaultCompletion: TTransactionCompletion): ITransaction;
207			begin
208			CheckHandle;
209			Result := TFB25Transaction.Create(self,TPB,DefaultCompletion);
210			end;
211
212			function TFB25Attachment.CreateBlob(transaction: ITransaction; RelationName,
213			ColumnName: string; BPB: IBPB): IBlob;
214			begin
215			CheckHandle;
216			Result := TFB25Blob.Create(self,transaction as TFB25transaction,
217			TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,RelationName,ColumnName),BPB);
218			end;
219
220			function TFB25Attachment.CreateBlob(transaction: ITransaction;
221			BlobMetaData: IBlobMetaData; BPB: IBPB): IBlob;
222			begin
223			CheckHandle;
224			Result := TFB25Blob.Create(self,transaction as TFB25transaction,BlobMetaData,BPB);
225			end;
226
227			function TFB25Attachment.CreateBlob(transaction: ITransaction;
228			SubType: integer; aCharSetID: cardinal; BPB: IBPB): IBlob;
229			begin
230			CheckHandle;
231			Result := TFB25Blob.Create(self,transaction as TFB25transaction,SubType,aCharSetID,BPB);
232			end;
233
234			function TFB25Attachment.OpenBlob(transaction: ITransaction; RelationName,
235			ColumnName: string; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob;
236			begin
237			CheckHandle;
238			Result := TFB25Blob.Create(self,transaction as TFB25transaction,
239			TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,RelationName,ColumnName),
240			BlobID,BPB);
241			end;
242
243			function TFB25Attachment.OpenBlob(transaction: ITransaction;
244			BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob;
245			begin
246			CheckHandle;
247			Result := TFB25Blob.Create(self,transaction as TFB25transaction,BlobMetaData,BlobID,BPB);
248			end;
249
250			procedure TFB25Attachment.ExecImmediate(transaction: ITransaction; sql: string;
251			aSQLDialect: integer);
252			var TRHandle: TISC_TR_HANDLE;
253			begin
254			CheckHandle;
255			TRHandle := (Transaction as TFB25Transaction).Handle;
256			with Firebird25ClientAPI do
257			if isc_dsql_execute_immediate(StatusVector, @fHandle, @TRHandle, 0,PChar(sql), aSQLDialect, nil) > 0 then
258			IBDatabaseError;
259			SignalActivity;
260			end;
261
262			function TFB25Attachment.Prepare(transaction: ITransaction; sql: string;
263			aSQLDialect: integer): IStatement;
264			begin
265			CheckHandle;
266			Result := TFB25Statement.Create(self,transaction,sql,aSQLDialect);
267			end;
268
269			function TFB25Attachment.PrepareWithNamedParameters(transaction: ITransaction;
270			sql: string; aSQLDialect: integer; GenerateParamNames: boolean): IStatement;
271			begin
272			CheckHandle;
273			Result := TFB25Statement.CreateWithParameterNames(self,transaction,sql,aSQLDialect,
274			GenerateParamNames);
275			end;
276
277			function TFB25Attachment.GetEventHandler(Events: TStrings): IEvents;
278			begin
279			CheckHandle;
280			Result := TFB25Events.Create(self,Events);
281			end;
282
283			function TFB25Attachment.OpenArray(transaction: ITransaction; RelationName, ColumnName: string;
284			ArrayID: TISC_QUAD): IArray;
285			begin
286			CheckHandle;
287			Result := TFB25Array.Create(self,transaction as TFB25Transaction,
288			GetArrayMetaData(transaction,RelationName,ColumnName),ArrayID);
289			end;
290
291			function TFB25Attachment.CreateArray(transaction: ITransaction; RelationName, ColumnName: string): IArray;
292			begin
293			CheckHandle;
294			Result := TFB25Array.Create(self,transaction as TFB25Transaction,
295			GetArrayMetaData(transaction,RelationName,ColumnName));
296			end;
297
298			function TFB25Attachment.CreateArray(transaction: ITransaction;
299			ArrayMetaData: IArrayMetaData): IArray;
300			begin
301			CheckHandle;
302			Result := TFB25Array.Create(self,transaction as TFB25Transaction,ArrayMetaData);
303			end;
304
305			function TFB25Attachment.GetBlobMetaData(Transaction: ITransaction; tableName,
306			columnName: string): IBlobMetaData;
307			begin
308			CheckHandle;
309			Result := TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,tableName,columnName);
310			end;
311
312			function TFB25Attachment.GetArrayMetaData(Transaction: ITransaction; tableName,
313			columnName: string): IArrayMetaData;
314			begin
315			CheckHandle;
316			Result := TFB25ArrayMetaData.Create(self,Transaction as TFB25Transaction,tableName,columnName);
317			end;
318
319			function TFB25Attachment.GetDBInformation(Requests: array of byte
320			): IDBInformation;
321			var ReqBuffer: PByte;
322			i: integer;
323			begin
324			CheckHandle;
325			if Length(Requests) = 1 then
326			Result := GetDBInformation(Requests[0])
327			else
328			begin
329			Result := TDBInformation.Create;
330			GetMem(ReqBuffer,Length(Requests));
331			try
332			for i := 0 to Length(Requests) - 1 do
333			ReqBuffer[i] := Requests[i];
334
335			with Firebird25ClientAPI, Result as TDBInformation do
336			if isc_database_info(StatusVector, @(FHandle), Length(Requests), PChar(ReqBuffer),
337			getBufSize, Buffer) > 0 then
338			IBDataBaseError;
339
340			finally
341			FreeMem(ReqBuffer);
342			end;
343			end;
344			end;
345
346			function TFB25Attachment.GetDBInformation(Request: byte): IDBInformation;
347			begin
348			CheckHandle;
349			Result := TDBInformation.Create;
350			with Firebird25ClientAPI, Result as TDBInformation do
351			if isc_database_info(StatusVector, @(FHandle), 1, @Request,
352			getBufSize, Buffer) > 0 then
353			IBDataBaseError;
354			end;
355
356			end.
357