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;
    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;
    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: 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;
end;

constructor TFB25Attachment.CreateDatabase(sql: AnsiString; aSQLDialect: integer;
    RaiseExceptionOnError: boolean);
var tr_handle: TISC_TR_HANDLE;
    info: IDBInformation;
    ConnectionType: integer;
    SiteName: AnsiString;
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;

    FCharSetID := 0;
    FCodePage := CP_NONE;
    FHasDefaultCharSet := false;
    info := GetDBInformation(isc_info_db_id);
    info[0].DecodeIDCluster(ConnectionType,FDatabaseName,SiteName);
  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),
                        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;

    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: 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(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:	56
Committed:	Mon Mar 6 10:20:02 2017 UTC (7 years, 8 months ago) by tony
Content type:	text/x-pascal
File size:	13631 byte(s)
Log Message:	Committing updates for Trunk
#	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	protected
50	procedure CheckHandle; override;
51	public
52	constructor Create(DatabaseName: AnsiString; aDPB: IDPB;
53	RaiseExceptionOnConnectError: boolean);
54	constructor CreateDatabase(DatabaseName: AnsiString; aDPB: IDPB; RaiseExceptionOnError: boolean); overload;
55	constructor CreateDatabase(sql: AnsiString; aSQLDialect: integer;
56	RaiseExceptionOnError: boolean); overload;
57	property Handle: TISC_DB_HANDLE read FHandle;
58
59	public
60	{IAttachment}
61	procedure Connect;
62	procedure Disconnect(Force: boolean=false); override;
63	function IsConnected: boolean;
64	procedure DropDatabase;
65	function StartTransaction(TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction; override;
66	function StartTransaction(TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction; override;
67	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	aSQLDialect: integer; GenerateParamNames: boolean=false): IStatement; override;
71	function GetEventHandler(Events: TStrings): IEvents; override;
72	function CreateBlob(transaction: ITransaction; RelationName, ColumnName: AnsiString; BPB: IBPB=nil): IBlob; overload;
73	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	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
78	function OpenArray(transaction: ITransaction; RelationName, ColumnName: AnsiString;
79	ArrayID: TISC_QUAD): IArray;
80	function CreateArray(transaction: ITransaction; RelationName, ColumnName: AnsiString
81	): IArray; overload;
82	function CreateArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData): IArray; overload;
83	function CreateArrayMetaData(SQLType: cardinal; tableName: AnsiString; columnName: AnsiString;
84	Scale: integer; size: cardinal;
85	acharSetID: cardinal; dimensions: cardinal; bounds: TArrayBounds
86	): IArrayMetaData;
87
88	{Database Information}
89
90	function GetBlobMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IBlobMetaData;
91	function GetArrayMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IArrayMetaData;
92	function GetDBInformation(Requests: array of byte): IDBInformation; overload;
93	function GetDBInformation(Request: byte): IDBInformation; overload;
94	end;
95
96	implementation
97
98	uses FB25Events,FB25Transaction, FBMessages, FB25Blob,
99	FB25Statement, FB25Array;
100
101	{ TFB25Attachment }
102
103	procedure TFB25Attachment.CheckHandle;
104	begin
105	if FHandle = nil then
106	IBError(ibxeDatabaseClosed,[nil]);
107	end;
108
109	constructor TFB25Attachment.Create(DatabaseName: AnsiString; aDPB: IDPB;
110	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	constructor TFB25Attachment.CreateDatabase(DatabaseName: AnsiString; aDPB: IDPB;
123	RaiseExceptionOnError: boolean);
124	var sql: AnsiString;
125	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	if (isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0, PAnsiChar(sql),
132	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	end;
140	end;
141
142	constructor TFB25Attachment.CreateDatabase(sql: AnsiString; aSQLDialect: integer;
143	RaiseExceptionOnError: boolean);
144	var tr_handle: TISC_TR_HANDLE;
145	info: IDBInformation;
146	ConnectionType: integer;
147	SiteName: AnsiString;
148	begin
149	inherited Create('',nil,RaiseExceptionOnError);
150	FSQLDialect := aSQLDialect;
151	tr_handle := nil;
152	with Firebird25ClientAPI do
153	begin
154	if (isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0, PAnsiChar(sql),
155	aSQLDialect, nil) > 0) and RaiseExceptionOnError then
156	IBDataBaseError;
157
158	FCharSetID := 0;
159	FCodePage := CP_NONE;
160	FHasDefaultCharSet := false;
161	info := GetDBInformation(isc_info_db_id);
162	info[0].DecodeIDCluster(ConnectionType,FDatabaseName,SiteName);
163	end;
164	end;
165
166	procedure TFB25Attachment.Connect;
167	var Param: IDPBItem;
168	begin
169	FSQLDialect := 3;
170
171	with Firebird25ClientAPI do
172	if DPB = nil then
173	begin
174	if (isc_attach_database(StatusVector, Length(FDatabaseName),
175	PAnsiChar(FDatabaseName), @FHandle, 0, nil) > 0) and FRaiseExceptionOnConnectError then
176	IBDatabaseError;
177	end
178	else
179	begin
180	if (isc_attach_database(StatusVector, Length(FDatabaseName),
181	PAnsiChar(FDatabaseName), @FHandle,
182	(DPB as TDPB).getDataLength,
183	(DPB as TDPB).getBuffer) > 0 ) and FRaiseExceptionOnConnectError then
184	IBDatabaseError;
185
186	if IsConnected then
187	begin
188	Param := DPB.Find(isc_dpb_set_db_SQL_dialect);
189	if Param <> nil then
190	FSQLDialect := Param.AsByte;
191	Param := DPB.Find(isc_dpb_lc_ctype);
192	FHasDefaultCharSet := (Param <> nil) and
193	CharSetName2CharSetID(Param.AsString,FCharSetID) and
194	CharSetID2CodePage(FCharSetID,FCodePage) and
195	(FCharSetID > 1);
196	end;
197	end;
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 Firebird25ClientAPI 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 Firebird25ClientAPI 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(self,TPB,DefaultCompletion);
236	end;
237
238	function TFB25Attachment.StartTransaction(TPB: ITPB;
239	DefaultCompletion: TTransactionCompletion): ITransaction;
240	begin
241	CheckHandle;
242	Result := TFB25Transaction.Create(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 Firebird25ClientAPI 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(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	function TFB25Attachment.GetDBInformation(Requests: array of byte
361	): IDBInformation;
362	var ReqBuffer: PByte;
363	i: integer;
364	begin
365	CheckHandle;
366	if Length(Requests) = 1 then
367	Result := GetDBInformation(Requests[0])
368	else
369	begin
370	Result := TDBInformation.Create;
371	GetMem(ReqBuffer,Length(Requests));
372	try
373	for i := 0 to Length(Requests) - 1 do
374	ReqBuffer[i] := Requests[i];
375
376	with Firebird25ClientAPI, Result as TDBInformation do
377	if isc_database_info(StatusVector, @(FHandle), Length(Requests), ReqBuffer,
378	getBufSize, Buffer) > 0 then
379	IBDataBaseError;
380
381	finally
382	FreeMem(ReqBuffer);
383	end;
384	end;
385	end;
386
387	function TFB25Attachment.GetDBInformation(Request: byte): IDBInformation;
388	begin
389	CheckHandle;
390	Result := TDBInformation.Create;
391	with Firebird25ClientAPI, Result as TDBInformation do
392	if isc_database_info(StatusVector, @(FHandle), 1, @Request,
393	getBufSize, Buffer) > 0 then
394	IBDataBaseError;
395	end;
396
397	end.
398