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;
    FFirebird25ClientAPI: TFB25ClientAPI;
  protected
    procedure CheckHandle; override;
  public
    constructor Create(api: TFB25ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
      RaiseExceptionOnConnectError: boolean);
    constructor CreateDatabase(api: TFB25ClientAPI; DatabaseName: AnsiString; aDPB: IDPB; RaiseExceptionOnError: boolean); overload;
    constructor CreateDatabase(api: TFB25ClientAPI; sql: AnsiString; aSQLDialect: integer;
      RaiseExceptionOnError: boolean); overload;
    function GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer): IDBInformation; override;
    property Handle: TISC_DB_HANDLE read FHandle;
    property Firebird25ClientAPI: TFB25ClientAPI read FFirebird25ClientAPI;

  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;
  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(api: TFB25ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
  RaiseExceptionOnConnectError: boolean);
begin
  FFirebird25ClientAPI := api;
  if aDPB = nil then
  begin
    if RaiseExceptionOnConnectError then
       IBError(ibxeNoDPB,[nil]);
    Exit;
  end;
  inherited Create(api,DatabaseName,aDPB,RaiseExceptionOnConnectError);
  Connect;
end;

constructor TFB25Attachment.CreateDatabase(api: TFB25ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
  RaiseExceptionOnError: boolean);
var sql: AnsiString;
    tr_handle: TISC_TR_HANDLE;
begin
  inherited Create(api,DatabaseName,aDPB,RaiseExceptionOnError);
  FFirebird25ClientAPI := api;
  sql := GenerateCreateDatabaseSQL(DatabaseName,aDPB);
  tr_handle := nil;
  with FFirebird25ClientAPI 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(api: TFB25ClientAPI; sql: AnsiString; aSQLDialect: integer;
    RaiseExceptionOnError: boolean);
var tr_handle: TISC_TR_HANDLE;
begin
  inherited Create(api,'',nil,RaiseExceptionOnError);
  FFirebird25ClientAPI := api;
  FSQLDialect := aSQLDialect;
  tr_handle := nil;
  with FFirebird25ClientAPI 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;

function TFB25Attachment.GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer
  ): IDBInformation;
begin
  Result := TDBInformation.Create(FFirebird25ClientAPI);
  with FFirebird25ClientAPI, Result as TDBInformation do
     if isc_database_info(StatusVector, @(FHandle), ReqBufLen, ReqBuffer,
                               getBufSize, Buffer) > 0 then
          IBDataBaseError;
end;

procedure TFB25Attachment.Connect;
begin
  FSQLDialect := 3;

  with FFirebird25ClientAPI 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 FFirebird25ClientAPI 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 FFirebird25ClientAPI 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(FFirebird25ClientAPI,self,TPB,DefaultCompletion);
end;

function TFB25Attachment.StartTransaction(TPB: ITPB;
  DefaultCompletion: TTransactionCompletion): ITransaction;
begin
  CheckHandle;
  Result := TFB25Transaction.Create(FFirebird25ClientAPI,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 FFirebird25ClientAPI 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;

end.

Revision:	263
Committed:	Thu Dec 6 15:55:01 2018 UTC (5 years, 4 months ago) by tony
Content type:	text/x-pascal
File size:	12741 byte(s)
Log Message:	Release 2.3.2 committed
#	Content
1	(*
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	{$IFDEF MSWINDOWS}
29	{$DEFINE WINDOWS}
30	{$ENDIF}
31
32	{$IFDEF FPC}
33	{$mode delphi}
34	{$interfaces COM}
35	{$ENDIF}
36
37	interface
38
39	uses
40	Classes, SysUtils, IB, FBAttachment, FB25ClientAPI, IBHeader,
41	FBParamBlock, FBOutputBlock, FBActivityMonitor;
42
43	type
44	{ TFB25Attachment }
45
46	TFB25Attachment = class(TFBAttachment, IAttachment, IActivityMonitor)
47	private
48	FHandle: TISC_DB_HANDLE;
49	FFirebird25ClientAPI: TFB25ClientAPI;
50	protected
51	procedure CheckHandle; override;
52	public
53	constructor Create(api: TFB25ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
54	RaiseExceptionOnConnectError: boolean);
55	constructor CreateDatabase(api: TFB25ClientAPI; DatabaseName: AnsiString; aDPB: IDPB; RaiseExceptionOnError: boolean); overload;
56	constructor CreateDatabase(api: TFB25ClientAPI; sql: AnsiString; aSQLDialect: integer;
57	RaiseExceptionOnError: boolean); overload;
58	function GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer): IDBInformation; override;
59	property Handle: TISC_DB_HANDLE read FHandle;
60	property Firebird25ClientAPI: TFB25ClientAPI read FFirebird25ClientAPI;
61
62	public
63	{IAttachment}
64	procedure Connect;
65	procedure Disconnect(Force: boolean=false); override;
66	function IsConnected: boolean; override;
67	procedure DropDatabase;
68	function StartTransaction(TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction; override;
69	function StartTransaction(TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction; override;
70	procedure ExecImmediate(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer); override;
71	function Prepare(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer): IStatement; override;
72	function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
73	aSQLDialect: integer; GenerateParamNames: boolean=false): IStatement; override;
74	function GetEventHandler(Events: TStrings): IEvents; override;
75	function CreateBlob(transaction: ITransaction; RelationName, ColumnName: AnsiString; BPB: IBPB=nil): IBlob; overload;
76	function CreateBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BPB: IBPB=nil): IBlob; overload;
77	function CreateBlob(transaction: ITransaction; SubType: integer; aCharSetID: cardinal=0; BPB: IBPB=nil): IBlob; overload;
78	function OpenBlob(transaction: ITransaction; RelationName, ColumnName: AnsiString; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload;
79	function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload; override;
80
81	function OpenArray(transaction: ITransaction; RelationName, ColumnName: AnsiString;
82	ArrayID: TISC_QUAD): IArray;
83	function CreateArray(transaction: ITransaction; RelationName, ColumnName: AnsiString
84	): IArray; overload;
85	function CreateArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData): IArray; overload;
86	function CreateArrayMetaData(SQLType: cardinal; tableName: AnsiString; columnName: AnsiString;
87	Scale: integer; size: cardinal;
88	acharSetID: cardinal; dimensions: cardinal; bounds: TArrayBounds
89	): IArrayMetaData;
90
91	{Database Information}
92
93	function GetBlobMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IBlobMetaData;
94	function GetArrayMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IArrayMetaData;
95	end;
96
97	implementation
98
99	uses FB25Events,FB25Transaction, FBMessages, FB25Blob,
100	FB25Statement, FB25Array, IBUtils;
101
102	{ TFB25Attachment }
103
104	procedure TFB25Attachment.CheckHandle;
105	begin
106	if FHandle = nil then
107	IBError(ibxeDatabaseClosed,[nil]);
108	end;
109
110	constructor TFB25Attachment.Create(api: TFB25ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
111	RaiseExceptionOnConnectError: boolean);
112	begin
113	FFirebird25ClientAPI := api;
114	if aDPB = nil then
115	begin
116	if RaiseExceptionOnConnectError then
117	IBError(ibxeNoDPB,[nil]);
118	Exit;
119	end;
120	inherited Create(api,DatabaseName,aDPB,RaiseExceptionOnConnectError);
121	Connect;
122	end;
123
124	constructor TFB25Attachment.CreateDatabase(api: TFB25ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
125	RaiseExceptionOnError: boolean);
126	var sql: AnsiString;
127	tr_handle: TISC_TR_HANDLE;
128	begin
129	inherited Create(api,DatabaseName,aDPB,RaiseExceptionOnError);
130	FFirebird25ClientAPI := api;
131	sql := GenerateCreateDatabaseSQL(DatabaseName,aDPB);
132	tr_handle := nil;
133	with FFirebird25ClientAPI do
134	if (isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0, PAnsiChar(sql),
135	SQLDialect, nil) > 0) and RaiseExceptionOnError then
136	IBDataBaseError;
137	if DPB <> nil then
138	{Connect using known parameters}
139	begin
140	Disconnect;
141	Connect;
142	end
143	else
144	GetODSAndConnectionInfo;
145	end;
146
147	constructor TFB25Attachment.CreateDatabase(api: TFB25ClientAPI; sql: AnsiString; aSQLDialect: integer;
148	RaiseExceptionOnError: boolean);
149	var tr_handle: TISC_TR_HANDLE;
150	begin
151	inherited Create(api,'',nil,RaiseExceptionOnError);
152	FFirebird25ClientAPI := api;
153	FSQLDialect := aSQLDialect;
154	tr_handle := nil;
155	with FFirebird25ClientAPI do
156	begin
157	if (isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0, PAnsiChar(sql),
158	aSQLDialect, nil) > 0) and RaiseExceptionOnError then
159	IBDataBaseError;
160
161	end;
162	GetODSAndConnectionInfo;
163	ExtractConnectString(sql,FDatabaseName);
164	DPBFromCreateSQL(sql);
165	end;
166
167	function TFB25Attachment.GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer
168	): IDBInformation;
169	begin
170	Result := TDBInformation.Create(FFirebird25ClientAPI);
171	with FFirebird25ClientAPI, Result as TDBInformation do
172	if isc_database_info(StatusVector, @(FHandle), ReqBufLen, ReqBuffer,
173	getBufSize, Buffer) > 0 then
174	IBDataBaseError;
175	end;
176
177	procedure TFB25Attachment.Connect;
178	begin
179	FSQLDialect := 3;
180
181	with FFirebird25ClientAPI do
182	if DPB = nil then
183	begin
184	if (isc_attach_database(StatusVector, Length(FDatabaseName),
185	PAnsiChar(FDatabaseName), @FHandle, 0, nil) > 0) and FRaiseExceptionOnConnectError then
186	IBDatabaseError;
187	end
188	else
189	begin
190	if (isc_attach_database(StatusVector, Length(FDatabaseName),
191	PAnsiChar(FDatabaseName), @FHandle,
192	(DPB as TDPB).getDataLength,
193	(DPB as TDPB).getBuffer) > 0 ) and FRaiseExceptionOnConnectError then
194	IBDatabaseError;
195
196	end;
197	GetODSAndConnectionInfo;
198	end;
199
200	procedure TFB25Attachment.Disconnect(Force: boolean);
201	begin
202	if FHandle = nil then
203	Exit;
204
205	EndAllTransactions;
206	{Disconnect}
207	with FFirebird25ClientAPI do
208	if (isc_detach_database(StatusVector, @FHandle) > 0) and not Force then
209	IBDatabaseError;
210	FHandle := nil;
211	FHasDefaultCharSet := false;
212	FCodePage := CP_NONE;
213	FCharSetID := 0;
214	end;
215
216	function TFB25Attachment.IsConnected: boolean;
217	begin
218	Result := FHandle <> nil;
219	end;
220
221	procedure TFB25Attachment.DropDatabase;
222	begin
223	CheckHandle;
224	EndAllTransactions;
225	with FFirebird25ClientAPI do
226	if isc_drop_database(StatusVector, @FHandle) > 0 then
227	IBDatabaseError;
228	FHandle := nil;
229	end;
230
231	function TFB25Attachment.StartTransaction(TPB: array of byte;
232	DefaultCompletion: TTransactionCompletion): ITransaction;
233	begin
234	CheckHandle;
235	Result := TFB25Transaction.Create(FFirebird25ClientAPI,self,TPB,DefaultCompletion);
236	end;
237
238	function TFB25Attachment.StartTransaction(TPB: ITPB;
239	DefaultCompletion: TTransactionCompletion): ITransaction;
240	begin
241	CheckHandle;
242	Result := TFB25Transaction.Create(FFirebird25ClientAPI,self,TPB,DefaultCompletion);
243	end;
244
245	function TFB25Attachment.CreateBlob(transaction: ITransaction; RelationName,
246	ColumnName: AnsiString; BPB: IBPB): IBlob;
247	begin
248	CheckHandle;
249	Result := TFB25Blob.Create(self,transaction as TFB25transaction,
250	TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,RelationName,ColumnName),BPB);
251	end;
252
253	function TFB25Attachment.CreateBlob(transaction: ITransaction;
254	BlobMetaData: IBlobMetaData; BPB: IBPB): IBlob;
255	begin
256	CheckHandle;
257	Result := TFB25Blob.Create(self,transaction as TFB25transaction,BlobMetaData,BPB);
258	end;
259
260	function TFB25Attachment.CreateBlob(transaction: ITransaction;
261	SubType: integer; aCharSetID: cardinal; BPB: IBPB): IBlob;
262	begin
263	CheckHandle;
264	Result := TFB25Blob.Create(self,transaction as TFB25transaction,SubType,aCharSetID,BPB);
265	end;
266
267	function TFB25Attachment.OpenBlob(transaction: ITransaction; RelationName,
268	ColumnName: AnsiString; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob;
269	begin
270	CheckHandle;
271	Result := TFB25Blob.Create(self,transaction as TFB25transaction,
272	TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,RelationName,ColumnName),
273	BlobID,BPB);
274	end;
275
276	function TFB25Attachment.OpenBlob(transaction: ITransaction;
277	BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob;
278	begin
279	CheckHandle;
280	Result := TFB25Blob.Create(self,transaction as TFB25transaction,BlobMetaData,BlobID,BPB);
281	end;
282
283	procedure TFB25Attachment.ExecImmediate(transaction: ITransaction; sql: AnsiString;
284	aSQLDialect: integer);
285	var TRHandle: TISC_TR_HANDLE;
286	begin
287	CheckHandle;
288	TRHandle := (Transaction as TFB25Transaction).Handle;
289	with FFirebird25ClientAPI do
290	if isc_dsql_execute_immediate(StatusVector, @fHandle, @TRHandle, 0,PAnsiChar(sql), aSQLDialect, nil) > 0 then
291	IBDatabaseError;
292	SignalActivity;
293	end;
294
295	function TFB25Attachment.Prepare(transaction: ITransaction; sql: AnsiString;
296	aSQLDialect: integer): IStatement;
297	begin
298	CheckHandle;
299	Result := TFB25Statement.Create(self,transaction,sql,aSQLDialect);
300	end;
301
302	function TFB25Attachment.PrepareWithNamedParameters(transaction: ITransaction;
303	sql: AnsiString; aSQLDialect: integer; GenerateParamNames: boolean): IStatement;
304	begin
305	CheckHandle;
306	Result := TFB25Statement.CreateWithParameterNames(self,transaction,sql,aSQLDialect,
307	GenerateParamNames);
308	end;
309
310	function TFB25Attachment.GetEventHandler(Events: TStrings): IEvents;
311	begin
312	CheckHandle;
313	Result := TFB25Events.Create(self,Events);
314	end;
315
316	function TFB25Attachment.OpenArray(transaction: ITransaction; RelationName, ColumnName: AnsiString;
317	ArrayID: TISC_QUAD): IArray;
318	begin
319	CheckHandle;
320	Result := TFB25Array.Create(self,transaction as TFB25Transaction,
321	GetArrayMetaData(transaction,RelationName,ColumnName),ArrayID);
322	end;
323
324	function TFB25Attachment.CreateArray(transaction: ITransaction; RelationName, ColumnName: AnsiString): IArray;
325	begin
326	CheckHandle;
327	Result := TFB25Array.Create(self,transaction as TFB25Transaction,
328	GetArrayMetaData(transaction,RelationName,ColumnName));
329	end;
330
331	function TFB25Attachment.CreateArray(transaction: ITransaction;
332	ArrayMetaData: IArrayMetaData): IArray;
333	begin
334	CheckHandle;
335	Result := TFB25Array.Create(self,transaction as TFB25Transaction,ArrayMetaData);
336	end;
337
338	function TFB25Attachment.CreateArrayMetaData(SQLType: cardinal;
339	tableName: AnsiString; columnName: AnsiString; Scale: integer; size: cardinal;
340	acharSetID: cardinal; dimensions: cardinal; bounds: TArrayBounds
341	): IArrayMetaData;
342	begin
343	Result := TFB25ArrayMetaData.Create(self,SQLType,tableName,ColumnName,Scale,size,acharSetID,dimensions,bounds);
344	end;
345
346	function TFB25Attachment.GetBlobMetaData(Transaction: ITransaction; tableName,
347	columnName: AnsiString): IBlobMetaData;
348	begin
349	CheckHandle;
350	Result := TFB25BlobMetaData.Create(self,Transaction as TFB25Transaction,tableName,columnName);
351	end;
352
353	function TFB25Attachment.GetArrayMetaData(Transaction: ITransaction; tableName,
354	columnName: AnsiString): IArrayMetaData;
355	begin
356	CheckHandle;
357	Result := TFB25ArrayMetaData.Create(self,Transaction as TFB25Transaction,tableName,columnName);
358	end;
359
360	end.
361