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;
{$IFDEF MSWINDOWS} 
{$DEFINE WINDOWS} 
{$ENDIF}

{$IFDEF FPC}
{$mode delphi}
{$interfaces COM}
{$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: AnsiString; aDPB: IDPB;
      RaiseExceptionOnConnectError: boolean);
    constructor CreateDatabase(DatabaseName: AnsiString; aDPB: IDPB; RaiseExceptionOnError: boolean); overload;
    constructor CreateDatabase(sql: AnsiString; aSQLDialect: integer;
      RaiseExceptionOnError: boolean); overload;
    property Handle: TISC_DB_HANDLE read FHandle;

  public
    {IAttachment}
    procedure Connect;
    procedure Disconnect(Force: boolean=false); override;
    function IsConnected: boolean; override;
    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: AnsiString; aSQLDialect: integer); override;
    function Prepare(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer): IStatement; override;
    function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
                       aSQLDialect: integer; GenerateParamNames: boolean=false): IStatement; override;
    function GetEventHandler(Events: TStrings): IEvents; override;
    function CreateBlob(transaction: ITransaction; RelationName, ColumnName: AnsiString; 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: AnsiString; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload;
    function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload; override;

    function OpenArray(transaction: ITransaction; RelationName, ColumnName: AnsiString;
      ArrayID: TISC_QUAD): IArray;
    function CreateArray(transaction: ITransaction; RelationName, ColumnName: AnsiString
      ): IArray; overload;
    function CreateArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData): IArray; overload;
    function CreateArrayMetaData(SQLType: cardinal; tableName: AnsiString; columnName: AnsiString;
      Scale: integer; size: cardinal;
      acharSetID: cardinal; dimensions: cardinal; bounds: TArrayBounds
  ): IArrayMetaData;

    {Database Information}

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

implementation

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

  { TFB25Attachment }

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

constructor TFB25Attachment.Create(DatabaseName: AnsiString; 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: AnsiString; aDPB: IDPB;
  RaiseExceptionOnError: boolean);
var sql: AnsiString;
    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, PAnsiChar(sql),
                                  SQLDialect, nil) > 0) and RaiseExceptionOnError then
    IBDataBaseError;
  if DPB <> nil then
  {Connect using known parameters}
  begin
    Disconnect;
    Connect;
  end
  else
    GetODSAndConnectionInfo;
end;

constructor TFB25Attachment.CreateDatabase(sql: AnsiString; aSQLDialect: integer;
    RaiseExceptionOnError: boolean);
var tr_handle: TISC_TR_HANDLE;
begin
  inherited Create('',nil,RaiseExceptionOnError);
  FSQLDialect := aSQLDialect;
  tr_handle := nil;
  with Firebird25ClientAPI do
  begin
    if (isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0, PAnsiChar(sql),
                                  aSQLDialect, nil) > 0) and RaiseExceptionOnError then
      IBDataBaseError;

  end;
  GetODSAndConnectionInfo;
  ExtractConnectString(sql,FDatabaseName);
  DPBFromCreateSQL(sql);
end;

procedure TFB25Attachment.Connect;
begin
  FSQLDialect := 3;

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

  end;
  GetODSAndConnectionInfo;
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: AnsiString; 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: AnsiString; 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: AnsiString;
  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,PAnsiChar(sql), aSQLDialect, nil) > 0 then
      IBDatabaseError;
  SignalActivity;
end;

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

function TFB25Attachment.PrepareWithNamedParameters(transaction: ITransaction;
  sql: AnsiString; 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: AnsiString;
  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: AnsiString): 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.CreateArrayMetaData(SQLType: cardinal;
  tableName: AnsiString; columnName: AnsiString; Scale: integer; size: cardinal;
  acharSetID: cardinal; dimensions: cardinal; bounds: TArrayBounds
  ): IArrayMetaData;
begin
  Result := TFB25ArrayMetaData.Create(self,SQLType,tableName,ColumnName,Scale,size,acharSetID,dimensions,bounds);
end;

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

function TFB25Attachment.GetArrayMetaData(Transaction: ITransaction; tableName,
  columnName: AnsiString): 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), 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:	117
Committed:	Mon Jan 22 13:58:11 2018 UTC (6 years, 3 months ago) by tony
Content type:	text/x-pascal
Original Path:	*ibx/trunk/fbintf/client/2.5/FB25Attachment.pas*
File size:	13086 byte(s)
Log Message:	Fixes Merged
#	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	tony	56	{$IFDEF MSWINDOWS}
29			{$DEFINE WINDOWS}
30			{$ENDIF}
31	tony	45
32			{$IFDEF FPC}
33	tony	56	{$mode delphi}
34	tony	45	{$interfaces COM}
35			{$ENDIF}
36
37			interface
38
39			uses
40			Classes, SysUtils, IB, FBAttachment, FB25ClientAPI, IBHeader,
41	tony	56	FBParamBlock, FBOutputBlock, FBActivityMonitor;
42	tony	45
43			type
44			{ TFB25Attachment }
45
46			TFB25Attachment = class(TFBAttachment, IAttachment, IActivityMonitor)
47			private
48			FHandle: TISC_DB_HANDLE;
49			protected
50			procedure CheckHandle; override;
51			public
52	tony	56	constructor Create(DatabaseName: AnsiString; aDPB: IDPB;
53	tony	45	RaiseExceptionOnConnectError: boolean);
54	tony	56	constructor CreateDatabase(DatabaseName: AnsiString; aDPB: IDPB; RaiseExceptionOnError: boolean); overload;
55			constructor CreateDatabase(sql: AnsiString; aSQLDialect: integer;
56	tony	47	RaiseExceptionOnError: boolean); overload;
57	tony	45	property Handle: TISC_DB_HANDLE read FHandle;
58
59			public
60			{IAttachment}
61			procedure Connect;
62			procedure Disconnect(Force: boolean=false); override;
63	tony	117	function IsConnected: boolean; override;
64	tony	45	procedure DropDatabase;
65			function StartTransaction(TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction; override;
66			function StartTransaction(TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction; override;
67	tony	56	procedure ExecImmediate(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer); override;
68			function Prepare(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer): IStatement; override;
69			function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
70	tony	45	aSQLDialect: integer; GenerateParamNames: boolean=false): IStatement; override;
71			function GetEventHandler(Events: TStrings): IEvents; override;
72	tony	56	function CreateBlob(transaction: ITransaction; RelationName, ColumnName: AnsiString; BPB: IBPB=nil): IBlob; overload;
73	tony	45	function CreateBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BPB: IBPB=nil): IBlob; overload;
74			function CreateBlob(transaction: ITransaction; SubType: integer; aCharSetID: cardinal=0; BPB: IBPB=nil): IBlob; overload;
75	tony	56	function OpenBlob(transaction: ITransaction; RelationName, ColumnName: AnsiString; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload;
76			function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload; override;
77	tony	45
78	tony	56	function OpenArray(transaction: ITransaction; RelationName, ColumnName: AnsiString;
79	tony	45	ArrayID: TISC_QUAD): IArray;
80	tony	56	function CreateArray(transaction: ITransaction; RelationName, ColumnName: AnsiString
81	tony	45	): IArray; overload;
82			function CreateArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData): IArray; overload;
83	tony	56	function CreateArrayMetaData(SQLType: cardinal; tableName: AnsiString; columnName: AnsiString;
84	tony	47	Scale: integer; size: cardinal;
85			acharSetID: cardinal; dimensions: cardinal; bounds: TArrayBounds
86			): IArrayMetaData;
87	tony	45
88			{Database Information}
89
90	tony	56	function GetBlobMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IBlobMetaData;
91			function GetArrayMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IArrayMetaData;
92	tony	117	function GetDBInformation(Requests: array of byte): IDBInformation; overload; override;
93			function GetDBInformation(Request: byte): IDBInformation; overload; override;
94	tony	45	end;
95
96			implementation
97
98			uses FB25Events,FB25Transaction, FBMessages, FB25Blob,
99	tony	117	FB25Statement, FB25Array, IBUtils;
100	tony	45
101			{ TFB25Attachment }
102
103			procedure TFB25Attachment.CheckHandle;
104			begin
105			if FHandle = nil then
106			IBError(ibxeDatabaseClosed,[nil]);
107			end;
108
109	tony	56	constructor TFB25Attachment.Create(DatabaseName: AnsiString; aDPB: IDPB;
110	tony	45	RaiseExceptionOnConnectError: boolean);
111			begin
112			if aDPB = nil then
113			begin
114			if RaiseExceptionOnConnectError then
115			IBError(ibxeNoDPB,[nil]);
116			Exit;
117			end;
118			inherited Create(DatabaseName,aDPB,RaiseExceptionOnConnectError);
119			Connect;
120			end;
121
122	tony	56	constructor TFB25Attachment.CreateDatabase(DatabaseName: AnsiString; aDPB: IDPB;
123	tony	45	RaiseExceptionOnError: boolean);
124	tony	56	var sql: AnsiString;
125	tony	45	tr_handle: TISC_TR_HANDLE;
126			begin
127			inherited Create(DatabaseName,aDPB,RaiseExceptionOnError);
128			sql := GenerateCreateDatabaseSQL(DatabaseName,aDPB);
129			tr_handle := nil;
130			with Firebird25ClientAPI do
131	tony	56	if (isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0, PAnsiChar(sql),
132	tony	45	SQLDialect, nil) > 0) and RaiseExceptionOnError then
133			IBDataBaseError;
134			if DPB <> nil then
135			{Connect using known parameters}
136			begin
137			Disconnect;
138			Connect;
139	tony	117	end
140			else
141			GetODSAndConnectionInfo;
142	tony	45	end;
143
144	tony	56	constructor TFB25Attachment.CreateDatabase(sql: AnsiString; aSQLDialect: integer;
145	tony	47	RaiseExceptionOnError: boolean);
146			var tr_handle: TISC_TR_HANDLE;
147			begin
148			inherited Create('',nil,RaiseExceptionOnError);
149			FSQLDialect := aSQLDialect;
150			tr_handle := nil;
151			with Firebird25ClientAPI do
152			begin
153	tony	56	if (isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0, PAnsiChar(sql),
154	tony	47	aSQLDialect, nil) > 0) and RaiseExceptionOnError then
155			IBDataBaseError;
156
157			end;
158	tony	117	GetODSAndConnectionInfo;
159			ExtractConnectString(sql,FDatabaseName);
160			DPBFromCreateSQL(sql);
161	tony	47	end;
162
163	tony	45	procedure TFB25Attachment.Connect;
164			begin
165			FSQLDialect := 3;
166
167			with Firebird25ClientAPI do
168			if DPB = nil then
169			begin
170			if (isc_attach_database(StatusVector, Length(FDatabaseName),
171	tony	56	PAnsiChar(FDatabaseName), @FHandle, 0, nil) > 0) and FRaiseExceptionOnConnectError then
172	tony	45	IBDatabaseError;
173			end
174			else
175			begin
176			if (isc_attach_database(StatusVector, Length(FDatabaseName),
177	tony	56	PAnsiChar(FDatabaseName), @FHandle,
178	tony	45	(DPB as TDPB).getDataLength,
179			(DPB as TDPB).getBuffer) > 0 ) and FRaiseExceptionOnConnectError then
180			IBDatabaseError;
181
182			end;
183	tony	117	GetODSAndConnectionInfo;
184	tony	45	end;
185
186			procedure TFB25Attachment.Disconnect(Force: boolean);
187			begin
188			if FHandle = nil then
189			Exit;
190
191			EndAllTransactions;
192			{Disconnect}
193			with Firebird25ClientAPI do
194			if (isc_detach_database(StatusVector, @FHandle) > 0) and not Force then
195			IBDatabaseError;
196			FHandle := nil;
197			FHasDefaultCharSet := false;
198			FCodePage := CP_NONE;
199			FCharSetID := 0;
200			end;
201
202			function TFB25Attachment.IsConnected: boolean;
203			begin
204			Result := FHandle <> nil;
205			end;
206
207			procedure TFB25Attachment.DropDatabase;
208			begin
209			CheckHandle;
210			EndAllTransactions;
211			with Firebird25ClientAPI do
212			if isc_drop_database(StatusVector, @FHandle) > 0 then
213			IBDatabaseError;
214			FHandle := nil;
215			end;
216
217			function TFB25Attachment.StartTransaction(TPB: array of byte;
218			DefaultCompletion: TTransactionCompletion): ITransaction;
219			begin
220			CheckHandle;
221			Result := TFB25Transaction.Create(self,TPB,DefaultCompletion);
222			end;
223
224			function TFB25Attachment.StartTransaction(TPB: ITPB;
225			DefaultCompletion: TTransactionCompletion): ITransaction;
226			begin
227			CheckHandle;
228			Result := TFB25Transaction.Create(self,TPB,DefaultCompletion);
229			end;
230
231			function TFB25Attachment.CreateBlob(transaction: ITransaction; RelationName,
232	tony	56	ColumnName: AnsiString; BPB: IBPB): IBlob;
233	tony	45	begin
234			CheckHandle;
235			Result := TFB25Blob.Create(self,transaction as TFB25transaction,
236			TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,RelationName,ColumnName),BPB);
237			end;
238
239			function TFB25Attachment.CreateBlob(transaction: ITransaction;
240			BlobMetaData: IBlobMetaData; BPB: IBPB): IBlob;
241			begin
242			CheckHandle;
243			Result := TFB25Blob.Create(self,transaction as TFB25transaction,BlobMetaData,BPB);
244			end;
245
246			function TFB25Attachment.CreateBlob(transaction: ITransaction;
247			SubType: integer; aCharSetID: cardinal; BPB: IBPB): IBlob;
248			begin
249			CheckHandle;
250			Result := TFB25Blob.Create(self,transaction as TFB25transaction,SubType,aCharSetID,BPB);
251			end;
252
253			function TFB25Attachment.OpenBlob(transaction: ITransaction; RelationName,
254	tony	56	ColumnName: AnsiString; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob;
255	tony	45	begin
256			CheckHandle;
257			Result := TFB25Blob.Create(self,transaction as TFB25transaction,
258			TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,RelationName,ColumnName),
259			BlobID,BPB);
260			end;
261
262			function TFB25Attachment.OpenBlob(transaction: ITransaction;
263			BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob;
264			begin
265			CheckHandle;
266			Result := TFB25Blob.Create(self,transaction as TFB25transaction,BlobMetaData,BlobID,BPB);
267			end;
268
269	tony	56	procedure TFB25Attachment.ExecImmediate(transaction: ITransaction; sql: AnsiString;
270	tony	45	aSQLDialect: integer);
271			var TRHandle: TISC_TR_HANDLE;
272			begin
273			CheckHandle;
274			TRHandle := (Transaction as TFB25Transaction).Handle;
275			with Firebird25ClientAPI do
276	tony	56	if isc_dsql_execute_immediate(StatusVector, @fHandle, @TRHandle, 0,PAnsiChar(sql), aSQLDialect, nil) > 0 then
277	tony	45	IBDatabaseError;
278			SignalActivity;
279			end;
280
281	tony	56	function TFB25Attachment.Prepare(transaction: ITransaction; sql: AnsiString;
282	tony	45	aSQLDialect: integer): IStatement;
283			begin
284			CheckHandle;
285			Result := TFB25Statement.Create(self,transaction,sql,aSQLDialect);
286			end;
287
288			function TFB25Attachment.PrepareWithNamedParameters(transaction: ITransaction;
289	tony	56	sql: AnsiString; aSQLDialect: integer; GenerateParamNames: boolean): IStatement;
290	tony	45	begin
291			CheckHandle;
292			Result := TFB25Statement.CreateWithParameterNames(self,transaction,sql,aSQLDialect,
293			GenerateParamNames);
294			end;
295
296			function TFB25Attachment.GetEventHandler(Events: TStrings): IEvents;
297			begin
298			CheckHandle;
299			Result := TFB25Events.Create(self,Events);
300			end;
301
302	tony	56	function TFB25Attachment.OpenArray(transaction: ITransaction; RelationName, ColumnName: AnsiString;
303	tony	45	ArrayID: TISC_QUAD): IArray;
304			begin
305			CheckHandle;
306			Result := TFB25Array.Create(self,transaction as TFB25Transaction,
307			GetArrayMetaData(transaction,RelationName,ColumnName),ArrayID);
308			end;
309
310	tony	56	function TFB25Attachment.CreateArray(transaction: ITransaction; RelationName, ColumnName: AnsiString): IArray;
311	tony	45	begin
312			CheckHandle;
313			Result := TFB25Array.Create(self,transaction as TFB25Transaction,
314			GetArrayMetaData(transaction,RelationName,ColumnName));
315			end;
316
317			function TFB25Attachment.CreateArray(transaction: ITransaction;
318			ArrayMetaData: IArrayMetaData): IArray;
319			begin
320			CheckHandle;
321			Result := TFB25Array.Create(self,transaction as TFB25Transaction,ArrayMetaData);
322			end;
323
324	tony	47	function TFB25Attachment.CreateArrayMetaData(SQLType: cardinal;
325	tony	56	tableName: AnsiString; columnName: AnsiString; Scale: integer; size: cardinal;
326	tony	47	acharSetID: cardinal; dimensions: cardinal; bounds: TArrayBounds
327			): IArrayMetaData;
328			begin
329	tony	60	Result := TFB25ArrayMetaData.Create(self,SQLType,tableName,ColumnName,Scale,size,acharSetID,dimensions,bounds);
330	tony	47	end;
331
332	tony	45	function TFB25Attachment.GetBlobMetaData(Transaction: ITransaction; tableName,
333	tony	56	columnName: AnsiString): IBlobMetaData;
334	tony	45	begin
335			CheckHandle;
336			Result := TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,tableName,columnName);
337			end;
338
339			function TFB25Attachment.GetArrayMetaData(Transaction: ITransaction; tableName,
340	tony	56	columnName: AnsiString): IArrayMetaData;
341	tony	45	begin
342			CheckHandle;
343			Result := TFB25ArrayMetaData.Create(self,Transaction as TFB25Transaction,tableName,columnName);
344			end;
345
346			function TFB25Attachment.GetDBInformation(Requests: array of byte
347			): IDBInformation;
348			var ReqBuffer: PByte;
349			i: integer;
350			begin
351			CheckHandle;
352			if Length(Requests) = 1 then
353			Result := GetDBInformation(Requests[0])
354			else
355			begin
356			Result := TDBInformation.Create;
357			GetMem(ReqBuffer,Length(Requests));
358			try
359			for i := 0 to Length(Requests) - 1 do
360			ReqBuffer[i] := Requests[i];
361
362			with Firebird25ClientAPI, Result as TDBInformation do
363	tony	56	if isc_database_info(StatusVector, @(FHandle), Length(Requests), ReqBuffer,
364	tony	45	getBufSize, Buffer) > 0 then
365			IBDataBaseError;
366
367			finally
368			FreeMem(ReqBuffer);
369			end;
370			end;
371			end;
372
373			function TFB25Attachment.GetDBInformation(Request: byte): IDBInformation;
374			begin
375			CheckHandle;
376			Result := TDBInformation.Create;
377			with Firebird25ClientAPI, Result as TDBInformation do
378			if isc_database_info(StatusVector, @(FHandle), 1, @Request,
379			getBufSize, Buffer) > 0 then
380			IBDataBaseError;
381			end;
382
383			end.
384