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Comparing ibx/trunk/runtime/IBDatabase.pas (file contents):
Revision 7 by tony, Sun Aug 5 18:28:19 2012 UTC vs.
Revision 29 by tony, Sat May 9 11:37:49 2015 UTC

#	Line 1 | Line 1
1	<	{************************************************************************}
2	<	{                                                                        }
3	<	{       Borland Delphi Visual Component Library                          }
4	<	{       InterBase Express core components                                }
5	<	{                                                                        }
6	<	{       Copyright (c) 1998-2000 Inprise Corporation                      }
7	<	{                                                                        }
8	<	{    InterBase Express is based in part on the product                   }
9	<	{    Free IB Components, written by Gregory H. Deatz for                 }
10	<	{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
11	<	{    Free IB Components is used under license.                           }
12	<	{                                                                        }
13	<	{    The contents of this file are subject to the InterBase              }
14	<	{    Public License Version 1.0 (the "License"); you may not             }
15	<	{    use this file except in compliance with the License. You            }
16	<	{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	<	{    Software distributed under the License is distributed on            }
18	<	{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
19	<	{    express or implied. See the License for the specific language       }
20	<	{    governing rights and limitations under the License.                 }
21	<	{    The Original Code was created by InterBase Software Corporation     }
22	<	{       and its successors.                                              }
23	<	{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
24	<	{       Corporation. All Rights Reserved.                                }
25	<	{    Contributor(s): Jeff Overcash                                       }
26	<	{                                                                        }
27	<	{    IBX For Lazarus (Firebird Express)                                  }
28	<	{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	<	{    Portions created by MWA Software are copyright McCallum Whyman      }
30	<	{    Associates Ltd 2011                                                 }
31	<	{                                                                        }
32	<	{************************************************************************}
33	<
34	<	unit IBDatabase;
35	<
36	<	{$Mode Delphi}
37	<
38	<	interface
39	<
40	<	uses
41	<	{$IFDEF WINDOWS }
42	<	Windows,
43	<	{$ELSE}
44	<	unix,
45	<	{$ENDIF}
46	<	Dialogs, Controls, StdCtrls, SysUtils, Classes, Forms, ExtCtrls, IBHeader, IBExternals, DB,
47	<	IB, DBLoginDlg;
48	<
49	<	const
50	<	DPBPrefix = 'isc_dpb_';
51	<	DPBConstantNames: array[1..isc_dpb_last_dpb_constant] of string = (
52	<	'cdd_pathname',
53	<	'allocation',
54	<	'journal',
55	<	'page_size',
56	<	'num_buffers',
57	<	'buffer_length',
58	<	'debug',
59	<	'garbage_collect',
60	<	'verify',
61	<	'sweep',
62	<	'enable_journal',
63	<	'disable_journal',
64	<	'dbkey_scope',
65	<	'number_of_users',
66	<	'trace',
67	<	'no_garbage_collect',
68	<	'damaged',
69	<	'license',
70	<	'sys_user_name',
71	<	'encrypt_key',
72	<	'activate_shadow',
73	<	'sweep_interval',
74	<	'delete_shadow',
75	<	'force_write',
76	<	'begin_log',
77	<	'quit_log',
78	<	'no_reserve',
79	<	'user_name',
80	<	'password',
81	<	'password_enc',
82	<	'sys_user_name_enc',
83	<	'interp',
84	<	'online_dump',
85	<	'old_file_size',
86	<	'old_num_files',
87	<	'old_file',
88	<	'old_start_page',
89	<	'old_start_seqno',
90	<	'old_start_file',
91	<	'drop_walfile',
92	<	'old_dump_id',
93	<	'wal_backup_dir',
94	<	'wal_chkptlen',
95	<	'wal_numbufs',
96	<	'wal_bufsize',
97	<	'wal_grp_cmt_wait',
98	<	'lc_messages',
99	<	'lc_ctype',
100	<	'cache_manager',
101	<	'shutdown',
102	<	'online',
103	<	'shutdown_delay',
104	<	'reserved',
105	<	'overwrite',
106	<	'sec_attach',
107	<	'disable_wal',
108	<	'connect_timeout',
109	<	'dummy_packet_interval',
110	<	'gbak_attach',
111	<	'sql_role_name',
112	<	'set_page_buffers',
113	<	'working_directory',
114	<	'sql_dialect',
115	<	'set_db_readonly',
116	<	'set_db_sql_dialect',
117	<	'gfix_attach',
118	<	'gstat_attach'
119	<	);
120	<
121	<	TPBPrefix = 'isc_tpb_';
122	<	TPBConstantNames: array[1..isc_tpb_last_tpb_constant] of string = (
123	<	'consistency',
124	<	'concurrency',
125	<	'shared',
126	<	'protected',
127	<	'exclusive',
128	<	'wait',
129	<	'nowait',
130	<	'read',
131	<	'write',
132	<	'lock_read',
133	<	'lock_write',
134	<	'verb_time',
135	<	'commit_time',
136	<	'ignore_limbo',
137	<	'read_committed',
138	<	'autocommit',
139	<	'rec_version',
140	<	'no_rec_version',
141	<	'restart_requests',
142	<	'no_auto_undo'
143	<	);
144	<
145	<	type
146	<
147	<	TIBDatabase = class;
148	<	TIBTransaction = class;
149	<	TIBBase = class;
150	<
151	<	TIBDatabaseLoginEvent = procedure(Database: TIBDatabase;
152	<	LoginParams: TStrings) of object;
153	<
154	<	TIBFileName = type string;
155	<	{ TIBDatabase }
156	<	TIBDataBase = class(TCustomConnection)
157	<	private
158	<	FAllowStreamedConnected: boolean;
159	<	FHiddenPassword: string;
160	<	FIBLoaded: Boolean;
161	<	FOnLogin: TIBDatabaseLoginEvent;
162	<	FTraceFlags: TTraceFlags;
163	<	FDBSQLDialect: Integer;
164	<	FSQLDialect: Integer;
165	<	FOnDialectDowngradeWarning: TNotifyEvent;
166	<	FCanTimeout: Boolean;
167	<	FSQLObjects: TList;
168	<	FTransactions: TList;
169	<	FDBName: TIBFileName;
170	<	FDBParams: TStrings;
171	<	FDBParamsChanged: Boolean;
172	<	FDPB: PChar;
173	<	FDPBLength: Short;
174	<	FHandle: TISC_DB_HANDLE;
175	<	FHandleIsShared: Boolean;
176	<	FOnIdleTimer: TNotifyEvent;
177	<	FDefaultTransaction: TIBTransaction;
178	<	FInternalTransaction: TIBTransaction;
179	<	FStreamedConnected: Boolean;
180	<	FTimer: TTimer;
181	<	FUserNames: TStringList;
182	<	FDataSets: TList;
183	<	FLoginCalled: boolean;
184	<	procedure EnsureInactive;
185	<	function GetDBSQLDialect: Integer;
186	<	function GetSQLDialect: Integer;
187	<	procedure SetSQLDialect(const Value: Integer);
188	<	procedure ValidateClientSQLDialect;
189	<	procedure DBParamsChange(Sender: TObject);
190	<	procedure DBParamsChanging(Sender: TObject);
191	<	function GetSQLObject(Index: Integer): TIBBase;
192	<	function GetSQLObjectCount: Integer;
193	<	function GetDBParamByDPB(const Idx: Integer): String;
194	<	function GetIdleTimer: Integer;
195	<	function GetTransaction(Index: Integer): TIBTransaction;
196	<	function GetTransactionCount: Integer;
197	<	function Login: Boolean;
198	<	procedure SetDatabaseName(const Value: TIBFileName);
199	<	procedure SetDBParamByDPB(const Idx: Integer; Value: String);
200	<	procedure SetDBParams(Value: TStrings);
201	<	procedure SetDefaultTransaction(Value: TIBTransaction);
202	<	procedure SetIdleTimer(Value: Integer);
203	<	procedure TimeoutConnection(Sender: TObject);
204	<	function GetIsReadOnly: Boolean;
205	<	function AddSQLObject(ds: TIBBase): Integer;
206	<	procedure RemoveSQLObject(Idx: Integer);
207	<	procedure RemoveSQLObjects;
208	<	procedure InternalClose(Force: Boolean);
209	<
210	<	protected
211	<	procedure DoConnect; override;
212	<	procedure DoDisconnect; override;
213	<	function GetConnected: Boolean; override;
214	<	procedure CheckStreamConnect;
215	<	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
216	<	function GetDataset(Index : longint) : TDataset; override;
217	<	function GetDataSetCount : Longint; override;
218	<	procedure SetConnected (Value : boolean); override;
219	<	public
220	<	constructor Create(AOwner: TComponent); override;
221	<	destructor Destroy; override;
222	<	procedure ApplyUpdates(const DataSets: array of TDataSet);
223	<	procedure CloseDataSets;
224	<	procedure CheckActive;
225	<	procedure CheckInactive;
226	<	procedure CreateDatabase;
227	<	procedure DropDatabase;
228	<	procedure ForceClose;
229	<	procedure GetFieldNames(const TableName: string; List: TStrings);
230	<	procedure GetTableNames(List: TStrings; SystemTables: Boolean = False);
231	<	function IndexOfDBConst(st: String): Integer;
232	<	function TestConnected: Boolean;
233	<	procedure CheckDatabaseName;
234	<	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
235	<	function AddTransaction(TR: TIBTransaction): Integer;
236	<	function FindTransaction(TR: TIBTransaction): Integer;
237	<	function FindDefaultTransaction(): TIBTransaction;
238	<	procedure RemoveTransaction(Idx: Integer);
239	<	procedure RemoveTransactions;
240	<	procedure SetHandle(Value: TISC_DB_HANDLE);
241	<
242	<	property Handle: TISC_DB_HANDLE read FHandle;
243	<	property IsReadOnly: Boolean read GetIsReadOnly;
244	<	property DBParamByDPB[const Idx: Integer]: String read GetDBParamByDPB
245	<	write SetDBParamByDPB;
246	<	property SQLObjectCount: Integer read GetSQLObjectCount;
247	<	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
248	<	property HandleIsShared: Boolean read FHandleIsShared;
249	<	property TransactionCount: Integer read GetTransactionCount;
250	<	property Transactions[Index: Integer]: TIBTransaction read GetTransaction;
251	<	property InternalTransaction: TIBTransaction read FInternalTransaction;
252	<
253	<	published
254	<	property Connected;
255	<	property AllowStreamedConnected: boolean read FAllowStreamedConnected
256	<	write FAllowStreamedConnected;
257	<	property DatabaseName: TIBFileName read FDBName write SetDatabaseName;
258	<	property Params: TStrings read FDBParams write SetDBParams;
259	<	property LoginPrompt default True;
260	<	property DefaultTransaction: TIBTransaction read FDefaultTransaction
261	<	write SetDefaultTransaction;
262	<	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer;
263	<	property SQLDialect : Integer read GetSQLDialect write SetSQLDialect default 3;
264	<	property DBSQLDialect : Integer read FDBSQLDialect;
265	<	property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
266	<	property AfterConnect;
267	<	property AfterDisconnect;
268	<	property BeforeConnect;
269	<	property BeforeDisconnect;
270	<	property OnLogin: TIBDatabaseLoginEvent read FOnLogin write FOnLogin;
271	<	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
272	<	property OnDialectDowngradeWarning: TNotifyEvent read FOnDialectDowngradeWarning write FOnDialectDowngradeWarning;
273	<	end;
274	<
275	<	{ TIBTransaction }
276	<
277	<	TTransactionAction         = (TARollback, TACommit, TARollbackRetaining, TACommitRetaining);
278	<
279	<	TIBTransaction = class(TComponent)
280	<	private
281	<	FIBLoaded: Boolean;
282	<	FCanTimeout         : Boolean;
283	<	FDatabases          : TList;
284	<	FSQLObjects         : TList;
285	<	FDefaultDatabase    : TIBDatabase;
286	<	FHandle             : TISC_TR_HANDLE;
287	<	FHandleIsShared     : Boolean;
288	<	FOnIdleTimer          : TNotifyEvent;
289	<	FStreamedActive     : Boolean;
290	<	FTPB                : PChar;
291	<	FTPBLength          : Short;
292	<	FTimer              : TTimer;
293	<	FDefaultAction      : TTransactionAction;
294	<	FTRParams           : TStrings;
295	<	FTRParamsChanged    : Boolean;
296	<	FInEndTransaction   : boolean;
297	<	procedure EnsureNotInTransaction;
298	<	procedure EndTransaction(Action: TTransactionAction; Force: Boolean);
299	<	function GetDatabase(Index: Integer): TIBDatabase;
300	<	function GetDatabaseCount: Integer;
301	<	function GetSQLObject(Index: Integer): TIBBase;
302	<	function GetSQLObjectCount: Integer;
303	<	function GetInTransaction: Boolean;
304	<	function GetIdleTimer: Integer;
305	<	procedure BeforeDatabaseDisconnect(DB: TIBDatabase);
306	<	procedure SetActive(Value: Boolean);
307	<	procedure SetDefaultAction(Value: TTransactionAction);
308	<	procedure SetDefaultDatabase(Value: TIBDatabase);
309	<	procedure SetIdleTimer(Value: Integer);
310	<	procedure SetTRParams(Value: TStrings);
311	<	procedure TimeoutTransaction(Sender: TObject);
312	<	procedure TRParamsChange(Sender: TObject);
313	<	procedure TRParamsChanging(Sender: TObject);
314	<	function AddSQLObject(ds: TIBBase): Integer;
315	<	procedure RemoveSQLObject(Idx: Integer);
316	<	procedure RemoveSQLObjects;
317	<
318	<	protected
319	<	procedure Loaded; override;
320	<	procedure SetHandle(Value: TISC_TR_HANDLE);
321	<	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
322	<
323	<	public
324	<	constructor Create(AOwner: TComponent); override;
325	<	destructor Destroy; override;
326	<	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
327	<	procedure Commit;
328	<	procedure CommitRetaining;
329	<	procedure Rollback;
330	<	procedure RollbackRetaining;
331	<	procedure StartTransaction;
332	<	procedure CheckInTransaction;
333	<	procedure CheckNotInTransaction;
334	<
335	<	function AddDatabase(db: TIBDatabase): Integer;
336	<	function FindDatabase(db: TIBDatabase): Integer;
337	<	function FindDefaultDatabase: TIBDatabase;
338	<	procedure RemoveDatabase(Idx: Integer);
339	<	procedure RemoveDatabases;
340	<	procedure CheckDatabasesInList;
341	<
342	<	property DatabaseCount: Integer read GetDatabaseCount;
343	<	property Databases[Index: Integer]: TIBDatabase read GetDatabase;
344	<	property SQLObjectCount: Integer read GetSQLObjectCount;
345	<	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
346	<	property Handle: TISC_TR_HANDLE read FHandle;
347	<	property HandleIsShared: Boolean read FHandleIsShared;
348	<	property InTransaction: Boolean read GetInTransaction;
349	<	property TPB: PChar read FTPB;
350	<	property TPBLength: Short read FTPBLength;
351	<	published
352	<	property Active: Boolean read GetInTransaction write SetActive;
353	<	property DefaultDatabase: TIBDatabase read FDefaultDatabase
354	<	write SetDefaultDatabase;
355	<	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer default 0;
356	<	property DefaultAction: TTransactionAction read FDefaultAction write SetDefaultAction default taCommit;
357	<	property Params: TStrings read FTRParams write SetTRParams;
358	<	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
359	<	end;
360	<
361	<	{ TIBBase }
362	<
363	<	{ Virtually all components in IB are "descendents" of TIBBase.
364	<	It is to more easily manage the database and transaction
365	<	connections. }
366	<	TIBBase = class(TObject)
367	<	protected
368	<	FDatabase: TIBDatabase;
369	<	FIndexInDatabase: Integer;
370	<	FTransaction: TIBTransaction;
371	<	FIndexInTransaction: Integer;
372	<	FOwner: TObject;
373	<	FBeforeDatabaseDisconnect: TNotifyEvent;
374	<	FAfterDatabaseDisconnect: TNotifyEvent;
375	<	FAfterDatabaseConnect: TNotifyEvent;
376	<	FOnDatabaseFree: TNotifyEvent;
377	<	FBeforeTransactionEnd: TNotifyEvent;
378	<	FAfterTransactionEnd: TNotifyEvent;
379	<	FOnTransactionFree: TNotifyEvent;
380	<
381	<	procedure DoAfterDatabaseConnect; virtual;
382	<	procedure DoBeforeDatabaseDisconnect; virtual;
383	<	procedure DoAfterDatabaseDisconnect; virtual;
384	<	procedure DoDatabaseFree; virtual;
385	<	procedure DoBeforeTransactionEnd; virtual;
386	<	procedure DoAfterTransactionEnd; virtual;
387	<	procedure DoTransactionFree; virtual;
388	<	function GetDBHandle: PISC_DB_HANDLE; virtual;
389	<	function GetTRHandle: PISC_TR_HANDLE; virtual;
390	<	procedure SetDatabase(Value: TIBDatabase); virtual;
391	<	procedure SetTransaction(Value: TIBTransaction); virtual;
392	<	public
393	<	constructor Create(AOwner: TObject);
394	<	destructor Destroy; override;
395	<	procedure CheckDatabase; virtual;
396	<	procedure CheckTransaction; virtual;
397	<	public
398	<	property AfterDatabaseConnect: TNotifyEvent read FAfterDatabaseConnect
399	<	write FAfterDatabaseConnect;
400	<	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
401	<	write FBeforeDatabaseDisconnect;
402	<	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
403	<	write FAfterDatabaseDisconnect;
404	<	property OnDatabaseFree: TNotifyEvent read FOnDatabaseFree write FOnDatabaseFree;
405	<	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd write FBeforeTransactionEnd;
406	<	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd write FAfterTransactionEnd;
407	<	property OnTransactionFree: TNotifyEvent read FOnTransactionFree write FOnTransactionFree;
408	<	property Database: TIBDatabase read FDatabase
409	<	write SetDatabase;
410	<	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
411	<	property Owner: TObject read FOwner;
412	<	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
413	<	property Transaction: TIBTransaction read FTransaction
414	<	write SetTransaction;
415	<	end;
416	<
417	<	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
418	<	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
419	<
420	<
421	<	implementation
422	<
423	<	uses IBIntf, IBSQLMonitor, IBCustomDataSet, IBDatabaseInfo, IBSQL, IBUtils, typInfo;
424	<
425	<	{ TIBDatabase }
426	<
427	<	constructor TIBDatabase.Create(AOwner: TComponent);
428	<	begin
429	<	inherited Create(AOwner);
430	<	FIBLoaded := False;
431	<	CheckIBLoaded;
432	<	FIBLoaded := True;
433	<	LoginPrompt := True;
434	<	FSQLObjects := TList.Create;
435	<	FTransactions := TList.Create;
436	<	FDBName := '';
437	<	FDBParams := TStringList.Create;
438	<	FDBParamsChanged := True;
439	<	TStringList(FDBParams).OnChange := DBParamsChange;
440	<	TStringList(FDBParams).OnChanging := DBParamsChanging;
441	<	FDPB := nil;
442	<	FHandle := nil;
443	<	FUserNames := nil;
444	<	FInternalTransaction := TIBTransaction.Create(self);
445	<	FInternalTransaction.DefaultDatabase := Self;
446	<	FTimer := TTimer.Create(Self);
447	<	FTimer.Enabled := False;
448	<	FTimer.Interval := 0;
449	<	FTimer.OnTimer := TimeoutConnection;
450	<	FDBSQLDialect := 1;
451	<	FSQLDialect := 3;
452	<	FTraceFlags := [];
453	<	FDataSets := TList.Create;
454	<	CheckStreamConnect;
455	<	end;
456	<
457	<	destructor TIBDatabase.Destroy;
458	<	var
459	<	i: Integer;
460	<	begin
461	<	if FIBLoaded then
462	<	begin
463	<	IdleTimer := 0;
464	<	if FHandle <> nil then
465	<	ForceClose;
466	<	for i := 0 to FSQLObjects.Count - 1 do
467	<	if FSQLObjects[i] <> nil then
468	<	SQLObjects[i].DoDatabaseFree;
469	<	RemoveSQLObjects;
470	<	RemoveTransactions;
471	<	FInternalTransaction.Free;
472	<	FreeMem(FDPB);
473	<	FDPB := nil;
474	<	FDBParams.Free;
475	<	FSQLObjects.Free;
476	<	FUserNames.Free;
477	<	FTransactions.Free;
478	<	end;
479	<	FDataSets.Free;
480	<	inherited Destroy;
481	<	end;
482	<
483	<	function TIBDatabase.Call(ErrCode: ISC_STATUS;
484	<	RaiseError: Boolean): ISC_STATUS;
485	<	begin
486	<	result := ErrCode;
487	<	FCanTimeout := False;
488	<	if RaiseError and (ErrCode > 0) then
489	<	IBDataBaseError;
490	<	end;
491	<
492	<	procedure TIBDatabase.CheckActive;
493	<	begin
494	<	if StreamedConnected and (not Connected) then
495	<	Loaded;
496	<	if FHandle = nil then
497	<	IBError(ibxeDatabaseClosed, [nil]);
498	<	end;
499	<
500	<	procedure TIBDatabase.EnsureInactive;
501	<	begin
502	<	if csDesigning in ComponentState then
503	<	begin
504	<	if FHandle <> nil then
505	<	Close;
506	<	end
507	<	end;
508	<
509	<	procedure TIBDatabase.CheckInactive;
510	<	begin
511	<	if FHandle <> nil then
512	<	IBError(ibxeDatabaseOpen, [nil]);
513	<	end;
514	<
515	<	procedure TIBDatabase.CheckDatabaseName;
516	<	begin
517	<	if (FDBName = '') then
518	<	IBError(ibxeDatabaseNameMissing, [nil]);
519	<	end;
520	<
521	<	function TIBDatabase.AddSQLObject(ds: TIBBase): Integer;
522	<	begin
523	<	result := 0;
524	<	if (ds.Owner is TIBCustomDataSet) then
525	<	FDataSets.Add(ds.Owner);
526	<	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
527	<	Inc(result);
528	<	if (result = FSQLObjects.Count) then
529	<	FSQLObjects.Add(ds)
530	<	else
531	<	FSQLObjects[result] := ds;
532	<	end;
533	<
534	<	function TIBDatabase.AddTransaction(TR: TIBTransaction): Integer;
535	<	begin
536	<	result := FindTransaction(TR);
537	<	if result <> -1 then
538	<	begin
539	<	result := -1;
540	<	exit;
541	<	end;
542	<	result := 0;
543	<	while (result < FTransactions.Count) and (FTransactions[result] <> nil) do
544	<	Inc(result);
545	<	if (result = FTransactions.Count) then
546	<	FTransactions.Add(TR)
547	<	else
548	<	FTransactions[result] := TR;
549	<	end;
550	<
551	<	procedure TIBDatabase.DoDisconnect;
552	<	begin
553	<	if Connected then
554	<	InternalClose(False);
555	<	FDBSQLDialect := 1;
556	<	end;
557	<
558	<	procedure TIBDatabase.CreateDatabase;
559	<	var
560	<	tr_handle: TISC_TR_HANDLE;
561	<	begin
562	<	CheckInactive;
563	<	tr_handle := nil;
564	<	Call(
565	<	isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0,
566	<	PChar('CREATE DATABASE ''' + FDBName + ''' ' + {do not localize}
567	<	Params.Text), SQLDialect, nil),
568	<	True);
569	<	end;
570	<
571	<	procedure TIBDatabase.DropDatabase;
572	<	begin
573	<	CheckActive;
574	<	Call(isc_drop_database(StatusVector, @FHandle), True);
575	<	end;
576	<
577	<	procedure TIBDatabase.DBParamsChange(Sender: TObject);
578	<	begin
579	<	FDBParamsChanged := True;
580	<	end;
581	<
582	<	procedure TIBDatabase.DBParamsChanging(Sender: TObject);
583	<	begin
584	<	EnsureInactive;
585	<	CheckInactive;
586	<	end;
587	<
588	<	function TIBDatabase.FindTransaction(TR: TIBTransaction): Integer;
589	<	var
590	<	i: Integer;
591	<	begin
592	<	result := -1;
593	<	for i := 0 to FTransactions.Count - 1 do
594	<	if TR = Transactions[i] then
595	<	begin
596	<	result := i;
597	<	break;
598	<	end;
599	<	end;
600	<
601	<	function TIBDatabase.FindDefaultTransaction(): TIBTransaction;
602	<	var
603	<	i: Integer;
604	<	begin
605	<	result := FDefaultTransaction;
606	<	if result = nil then
607	<	begin
608	<	for i := 0 to FTransactions.Count - 1 do
609	<	if (Transactions[i] <> nil) and
610	<	(TIBTransaction(Transactions[i]).DefaultDatabase = self) and
611	<	(TIBTransaction(Transactions[i]) <> FInternalTransaction) then
612	<	begin
613	<	result := TIBTransaction(Transactions[i]);
614	<	break;
615	<	end;
616	<	end;
617	<	end;
618	<
619	<	procedure TIBDatabase.ForceClose;
620	<	begin
621	<	if Connected then
622	<	InternalClose(True);
623	<	end;
624	<
625	<	function TIBDatabase.GetConnected: Boolean;
626	<	begin
627	<	result := FHandle <> nil;
628	<	end;
629	<
630	<	function TIBDatabase.GetSQLObject(Index: Integer): TIBBase;
631	<	begin
632	<	result := FSQLObjects[Index];
633	<	end;
634	<
635	<	function TIBDatabase.GetSQLObjectCount: Integer;
636	<	var
637	<	i: Integer;
638	<	begin
639	<	result := 0;
640	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
641	<	Inc(result);
642	<	end;
643	<
644	<	function TIBDatabase.GetDBParamByDPB(const Idx: Integer): String;
645	<	var
646	<	ConstIdx, EqualsIdx: Integer;
647	<	begin
648	<	if (Idx > 0) and (Idx <= isc_dpb_last_dpb_constant) then
649	<	begin
650	<	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
651	<	if ConstIdx = -1 then
652	<	result := ''
653	<	else
654	<	begin
655	<	result := Params[ConstIdx];
656	<	EqualsIdx := Pos('=', result); {mbcs ok}
657	<	if EqualsIdx = 0 then
658	<	result := ''
659	<	else
660	<	result := Copy(result, EqualsIdx + 1, Length(result));
661	<	end;
662	<	end
663	<	else
664	<	result := '';
665	<	end;
666	<
667	<	function TIBDatabase.GetIdleTimer: Integer;
668	<	begin
669	<	result := FTimer.Interval;
670	<	end;
671	<
672	<	function TIBDatabase.GetTransaction(Index: Integer): TIBTransaction;
673	<	begin
674	<	result := FTransactions[Index];
675	<	end;
676	<
677	<	function TIBDatabase.GetTransactionCount: Integer;
678	<	var
679	<	i: Integer;
680	<	begin
681	<	result := 0;
682	<	for i := 0 to FTransactions.Count - 1 do
683	<	if FTransactions[i] <> nil then
684	<	Inc(result);
685	<	end;
686	<
687	<	function TIBDatabase.IndexOfDBConst(st: String): Integer;
688	<	var
689	<	i, pos_of_str: Integer;
690	<	begin
691	<	result := -1;
692	<	for i := 0 to Params.Count - 1 do
693	<	begin
694	<	pos_of_str := Pos(st, AnsiLowerCase(Params[i])); {mbcs ok}
695	<	if (pos_of_str = 1) or (pos_of_str = Length(DPBPrefix) + 1) then
696	<	begin
697	<	result := i;
698	<	break;
699	<	end;
700	<	end;
701	<	end;
702	<
703	<	procedure TIBDatabase.InternalClose(Force: Boolean);
704	<	var
705	<	i: Integer;
706	<	begin
707	<	CheckActive;
708	<	{ Tell all connected transactions that we're disconnecting.
709	<	This is so transactions can commit/rollback, accordingly
710	<	}
711	<	for i := 0 to FTransactions.Count - 1 do
712	<	begin
713	<	try
714	<	if FTransactions[i] <> nil then
715	<	Transactions[i].BeforeDatabaseDisconnect(Self);
716	<	except
717	<	if not Force then
718	<	raise;
719	<	end;
720	<	end;
721	<	for i := 0 to FSQLObjects.Count - 1 do
722	<	begin
723	<	try
724	<	if FSQLObjects[i] <> nil then
725	<	SQLObjects[i].DoBeforeDatabaseDisconnect;
726	<	except
727	<	if not Force then
728	<	raise;
729	<	end;
730	<	end;
731	<
732	<	if (not HandleIsShared) and
733	<	(Call(isc_detach_database(StatusVector, @FHandle), False) > 0) and
734	<	(not Force) then
735	<	IBDataBaseError
736	<	else
737	<	begin
738	<	FHandle := nil;
739	<	FHandleIsShared := False;
740	<	end;
741	<
742	<	if not (csDesigning in ComponentState) then
743	<	MonitorHook.DBDisconnect(Self);
744	<
745	<	for i := 0 to FSQLObjects.Count - 1 do
746	<	if FSQLObjects[i] <> nil then
747	<	SQLObjects[i].DoAfterDatabaseDisconnect;
748	<	end;
749	<
750	<	procedure TIBDataBase.CheckStreamConnect;
751	<	var
752	<	i: integer;
753	<	begin
754	<	try
755	<	if not (csDesigning in ComponentState) and StreamedConnected and (not Connected) then
756	<	begin
757	<	for i := 0 to FTransactions.Count - 1 do
758	<	if  FTransactions[i] <> nil then
759	<	begin
760	<	with TIBTransaction(FTransactions[i]) do
761	<	if not Active then
762	<	if FStreamedActive and not InTransaction then
763	<	begin
764	<	StartTransaction;
765	<	FStreamedActive := False;
766	<	end;
767	<	end;
768	<	if (FDefaultTransaction <> nil) and
769	<	(FDefaultTransaction.FStreamedActive) and
770	<	(not FDefaultTransaction.InTransaction) then
771	<	FDefaultTransaction.StartTransaction;
772	<	FStreamedConnected := False;
773	<	end;
774	<	except
775	<	if csDesigning in ComponentState then
776	<	Application.HandleException(Self)
777	<	else
778	<	raise;
779	<	end;
780	<	end;
781	<
782	<	procedure TIBDatabase.Notification( AComponent: TComponent;
783	<	Operation: TOperation);
784	<	var
785	<	i: Integer;
786	<	begin
787	<	inherited Notification( AComponent, Operation);
788	<	if (Operation = opRemove) and (AComponent = FDefaultTransaction) then
789	<	begin
790	<	i := FindTransaction(FDefaultTransaction);
791	<	if (i <> -1) then
792	<	RemoveTransaction(i);
793	<	FDefaultTransaction := nil;
794	<	end;
795	<	end;
796	<
797	<	function TIBDatabase.Login: Boolean;
798	<	var
799	<	IndexOfUser, IndexOfPassword: Integer;
800	<	Username, Password, OldPassword: String;
801	<	LoginParams: TStrings;
802	<
803	<	procedure HidePassword;
804	<	var
805	<	I: Integer;
806	<	IndexAt: Integer;
807	<	begin
808	<	IndexAt := 0;
809	<	for I := 0 to Params.Count -1 do
810	<	if Pos('password', LowerCase(Trim(Params.Names[i]))) = 1 then {mbcs ok}
811	<	begin
812	<	FHiddenPassword := Params.Values[Params.Names[i]];
813	<	IndexAt := I;
814	<	break;
815	<	end;
816	<	if IndexAt <> 0 then
817	<	Params.Delete(IndexAt);
818	<	end;
819	<
820	<	begin
821	<	Result := false;
822	<	if FLoginCalled then Exit;
823	<	FLoginCalled := true;
824	<	try
825	<	if Assigned(FOnLogin) and not (csDesigning in ComponentState) then
826	<	begin
827	<	result := True;
828	<	LoginParams := TStringList.Create;
829	<	try
830	<	LoginParams.Assign(Params);
831	<	FOnLogin(Self, LoginParams);
832	<	Params.Assign (LoginParams);
833	<	HidePassword;
834	<	finally
835	<	LoginParams.Free;
836	<	end;
837	<	end
838	<	else
839	<	begin
840	<	IndexOfUser := IndexOfDBConst(DPBConstantNames[isc_dpb_user_name]);
841	<	if IndexOfUser <> -1 then
842	<	Username := Copy(Params[IndexOfUser],
843	<	Pos('=', Params[IndexOfUser]) + 1, {mbcs ok}
844	<	Length(Params[IndexOfUser]));
845	<	IndexOfPassword := IndexOfDBConst(DPBConstantNames[isc_dpb_password]);
846	<	if IndexOfPassword <> -1 then
847	<	begin
848	<	Password := Copy(Params[IndexOfPassword],
849	<	Pos('=', Params[IndexOfPassword]) + 1, {mbcs ok}
850	<	Length(Params[IndexOfPassword]));
851	<	OldPassword := password;
852	<	end;
853	<	result := LoginDialogEx(DatabaseName, Username, Password, False);
854	<	if result then
855	<	begin
856	<	if IndexOfUser = -1 then
857	<	Params.Add(DPBConstantNames[isc_dpb_user_name] + '=' + Username)
858	<	else
859	<	Params[IndexOfUser] := DPBConstantNames[isc_dpb_user_name] +
860	<	'=' + Username;
861	<	if (Password = OldPassword) then
862	<	FHiddenPassword := ''
863	<	else
864	<	begin
865	<	FHiddenPassword := Password;
866	<	if OldPassword <> '' then
867	<	HidePassword;
868	<	end;
869	<	end;
870	<	end;
871	<	finally
872	<	FLoginCalled := false
873	<	end;
874	<	end;
875	<
876	<	procedure TIBDatabase.DoConnect;
877	<	var
878	<	DPB: String;
879	<	TempDBParams: TStrings;
880	<	I: integer;
881	<
882	<	begin
883	<	CheckInactive;
884	<	CheckDatabaseName;
885	<	if (not LoginPrompt) and (FHiddenPassword <> '') then
886	<	begin
887	<	FHiddenPassword := '';
888	<	FDBParamsChanged := True;
889	<	end;
890	<	{ Use builtin login prompt if requested }
891	<	if (LoginPrompt or (csDesigning in ComponentState)) and not Login then
892	<	IBError(ibxeOperationCancelled, [nil]);
893	<	{ Generate a new DPB if necessary }
894	<	if (FDBParamsChanged) then
895	<	begin
896	<	FDBParamsChanged := False;
897	<	if (not LoginPrompt and not (csDesigning in ComponentState)) or (FHiddenPassword = '') then
898	<	GenerateDPB(FDBParams, DPB, FDPBLength)
899	<	else
900	<	begin
901	<	TempDBParams := TStringList.Create;
902	<	try
903	<	TempDBParams.Assign(FDBParams);
904	<	TempDBParams.Add('password=' + FHiddenPassword);
905	<	GenerateDPB(TempDBParams, DPB, FDPBLength);
906	<	finally
907	<	TempDBParams.Free;
908	<	end;
909	<	end;
910	<	IBAlloc(FDPB, 0, FDPBLength);
911	<	Move(DPB[1], FDPB[0], FDPBLength);
912	<	end;
913	<	if Call(isc_attach_database(StatusVector, Length(FDBName),
914	<	PChar(FDBName), @FHandle,
915	<	FDPBLength, FDPB), False) > 0 then
916	<	begin
917	<	FHandle := nil;
918	<	IBDataBaseError;
919	<	end;
920	<	FDBSQLDialect := GetDBSQLDialect;
921	<	ValidateClientSQLDialect;
922	<	for i := 0 to FSQLObjects.Count - 1 do
923	<	begin
924	<	if FSQLObjects[i] <> nil then
925	<	SQLObjects[i].DoAfterDatabaseConnect;
926	<	end;
927	<	if not (csDesigning in ComponentState) then
928	<	MonitorHook.DBConnect(Self);
929	<	end;
930	<
931	<	procedure TIBDatabase.RemoveSQLObject(Idx: Integer);
932	<	var
933	<	ds: TIBBase;
934	<	begin
935	<	if (Idx >= 0) and (FSQLObjects[Idx] <> nil) then
936	<	begin
937	<	ds := SQLObjects[Idx];
938	<	FSQLObjects[Idx] := nil;
939	<	ds.Database := nil;
940	<	if (ds.owner is TDataSet) then
941	<	FDataSets.Remove(TDataSet(ds.Owner));
942	<	end;
943	<	end;
944	<
945	<	procedure TIBDatabase.RemoveSQLObjects;
946	<	var
947	<	i: Integer;
948	<	begin
949	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
950	<	begin
951	<	RemoveSQLObject(i);
952	<	if (TIBBase(FSQLObjects[i]).owner is TDataSet) then
953	<	FDataSets.Remove(TDataSet(TIBBase(FSQLObjects[i]).owner));
954	<	end;
955	<	end;
956	<
957	<	procedure TIBDatabase.RemoveTransaction(Idx: Integer);
958	<	var
959	<	TR: TIBTransaction;
960	<	begin
961	<	if ((Idx >= 0) and (FTransactions[Idx] <> nil)) then
962	<	begin
963	<	TR := Transactions[Idx];
964	<	FTransactions[Idx] := nil;
965	<	TR.RemoveDatabase(TR.FindDatabase(Self));
966	<	if TR = FDefaultTransaction then
967	<	FDefaultTransaction := nil;
968	<	end;
969	<	end;
970	<
971	<	procedure TIBDatabase.RemoveTransactions;
972	<	var
973	<	i: Integer;
974	<	begin
975	<	for i := 0 to FTransactions.Count - 1 do if FTransactions[i] <> nil then
976	<	RemoveTransaction(i);
977	<	end;
978	<
979	<	procedure TIBDatabase.SetDatabaseName(const Value: TIBFileName);
980	<	begin
981	<	if FDBName <> Value then
982	<	begin
983	<	EnsureInactive;
984	<	CheckInactive;
985	<	FDBName := Value;
986	<	end;
987	<	end;
988	<
989	<	procedure TIBDatabase.SetDBParamByDPB(const Idx: Integer; Value: String);
990	<	var
991	<	ConstIdx: Integer;
992	<	begin
993	<	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
994	<	if (Value = '') then
995	<	begin
996	<	if ConstIdx <> -1 then
997	<	Params.Delete(ConstIdx);
998	<	end
999	<	else
1000	<	begin
1001	<	if (ConstIdx = -1) then
1002	<	Params.Add(DPBConstantNames[Idx] + '=' + Value)
1003	<	else
1004	<	Params[ConstIdx] := DPBConstantNames[Idx] + '=' + Value;
1005	<	end;
1006	<	end;
1007	<
1008	<	procedure TIBDatabase.SetDBParams(Value: TStrings);
1009	<	begin
1010	<	FDBParams.Assign(Value);
1011	<	end;
1012	<
1013	<	procedure TIBDatabase.SetDefaultTransaction(Value: TIBTransaction);
1014	<	var
1015	<	i: Integer;
1016	<	begin
1017	<	if (FDefaultTransaction <> nil) and (FDefaultTransaction <> Value) then
1018	<	begin
1019	<	i := FindTransaction(FDefaultTransaction);
1020	<	if (i <> -1) and (FDefaultTransaction.DefaultDatabase <> self) then
1021	<	RemoveTransaction(i);
1022	<	end;
1023	<	if (Value <> nil) and (FDefaultTransaction <> Value) then
1024	<	begin
1025	<	Value.AddDatabase(Self);
1026	<	AddTransaction(Value);
1027	<	end;
1028	<	FDefaultTransaction := Value;
1029	<	end;
1030	<
1031	<	procedure TIBDatabase.SetHandle(Value: TISC_DB_HANDLE);
1032	<	begin
1033	<	if HandleIsShared then
1034	<	Close
1035	<	else
1036	<	CheckInactive;
1037	<	FHandle := Value;
1038	<	FHandleIsShared := (Value <> nil);
1039	<	end;
1040	<
1041	<	procedure TIBDatabase.SetIdleTimer(Value: Integer);
1042	<	begin
1043	<	if Value < 0 then
1044	<	IBError(ibxeTimeoutNegative, [nil])
1045	<	else
1046	<	if (Value = 0) then
1047	<	begin
1048	<	FTimer.Enabled := False;
1049	<	FTimer.Interval := 0;
1050	<	end
1051	<	else
1052	<	if (Value > 0) then
1053	<	begin
1054	<	FTimer.Interval := Value;
1055	<	if not (csDesigning in ComponentState) then
1056	<	FTimer.Enabled := True;
1057	<	end;
1058	<	end;
1059	<
1060	<	function TIBDatabase.TestConnected: Boolean;
1061	<	var
1062	<	DatabaseInfo: TIBDatabaseInfo;
1063	<	begin
1064	<	result := Connected;
1065	<	if result then
1066	<	begin
1067	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1068	<	try
1069	<	DatabaseInfo.Database := self;
1070	<	{ poke the server to see if connected }
1071	<	if DatabaseInfo.BaseLevel = 0 then ;
1072	<	DatabaseInfo.Free;
1073	<	except
1074	<	ForceClose;
1075	<	result := False;
1076	<	DatabaseInfo.Free;
1077	<	end;
1078	<	end;
1079	<	end;
1080	<
1081	<	procedure TIBDatabase.TimeoutConnection(Sender: TObject);
1082	<	begin
1083	<	if Connected then
1084	<	begin
1085	<	if FCanTimeout then
1086	<	begin
1087	<	ForceClose;
1088	<	if Assigned(FOnIdleTimer) then
1089	<	FOnIdleTimer(Self);
1090	<	end
1091	<	else
1092	<	FCanTimeout := True;
1093	<	end;
1094	<	end;
1095	<
1096	<	function TIBDatabase.GetIsReadOnly: Boolean;
1097	<	var
1098	<	DatabaseInfo: TIBDatabaseInfo;
1099	<	begin
1100	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1101	<	DatabaseInfo.Database := self;
1102	<	if (DatabaseInfo.ODSMajorVersion < 10) then
1103	<	result := false
1104	<	else
1105	<	begin
1106	<	if (DatabaseInfo.ReadOnly = 0) then
1107	<	result := false
1108	<	else
1109	<	result := true;
1110	<	end;
1111	<	DatabaseInfo.Free;
1112	<	end;
1113	<
1114	<	function TIBDatabase.GetSQLDialect: Integer;
1115	<	begin
1116	<	Result := FSQLDialect;
1117	<	end;
1118	<
1119	<
1120	<	procedure TIBDatabase.SetSQLDialect(const Value: Integer);
1121	<	begin
1122	<	if (Value < 1) then IBError(ibxeSQLDialectInvalid, [nil]);
1123	<	if ((FHandle = nil) or (Value <= FDBSQLDialect))  then
1124	<	FSQLDialect := Value
1125	<	else
1126	<	IBError(ibxeSQLDialectInvalid, [nil]);
1127	<	end;
1128	<
1129	<	function TIBDatabase.GetDBSQLDialect: Integer;
1130	<	var
1131	<	DatabaseInfo: TIBDatabaseInfo;
1132	<	begin
1133	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1134	<	DatabaseInfo.Database := self;
1135	<	result := DatabaseInfo.DBSQLDialect;
1136	<	DatabaseInfo.Free;
1137	<	end;
1138	<
1139	<	procedure TIBDatabase.ValidateClientSQLDialect;
1140	<	begin
1141	<	if (FDBSQLDialect < FSQLDialect) then
1142	<	begin
1143	<	FSQLDialect := FDBSQLDialect;
1144	<	if Assigned (FOnDialectDowngradeWarning) then
1145	<	FOnDialectDowngradeWarning(self);
1146	<	end;
1147	<	end;
1148	<
1149	<	procedure TIBDatabase.ApplyUpdates(const DataSets: array of TDataSet);
1150	<	var
1151	<	I: Integer;
1152	<	DS: TIBCustomDataSet;
1153	<	TR: TIBTransaction;
1154	<	begin
1155	<	TR := nil;
1156	<	for I := 0 to High(DataSets) do
1157	<	begin
1158	<	DS := TIBCustomDataSet(DataSets[I]);
1159	<	if DS.Database <> Self then
1160	<	IBError(ibxeUpdateWrongDB, [nil]);
1161	<	if TR = nil then
1162	<	TR := DS.Transaction;
1163	<	if (DS.Transaction <> TR) or (TR = nil) then
1164	<	IBError(ibxeUpdateWrongTR, [nil]);
1165	<	end;
1166	<	TR.CheckInTransaction;
1167	<	for I := 0 to High(DataSets) do
1168	<	begin
1169	<	DS := TIBCustomDataSet(DataSets[I]);
1170	<	DS.ApplyUpdates;
1171	<	end;
1172	<	TR.CommitRetaining;
1173	<	end;
1174	<
1175	<	procedure TIBDatabase.CloseDataSets;
1176	<	var
1177	<	i: Integer;
1178	<	begin
1179	<	for i := 0 to DataSetCount - 1 do
1180	<	if (DataSets[i] <> nil) then
1181	<	DataSets[i].close;
1182	<	end;
1183	<
1184	<	function TIBDatabase.GetDataset(Index : longint) : TDataset;
1185	<	begin
1186	<	if (Index >= 0) and (Index < FDataSets.Count) then
1187	<	Result := TDataSet(FDataSets[Index])
1188	<	else
1189	<	raise Exception.Create('Invalid Index to DataSets');
1190	<	end;
1191	<
1192	<	function TIBDatabase.GetDataSetCount : Longint;
1193	<	begin
1194	<	Result := FDataSets.Count;
1195	<	end;
1196	<
1197	<	procedure TIBDataBase.SetConnected(Value: boolean);
1198	<	begin
1199	<	if StreamedConnected and not AllowStreamedConnected then
1200	<	begin
1201	<	StreamedConnected := false;
1202	<	Value := false
1203	<	end;
1204	<	inherited SetConnected(Value);
1205	<	end;
1206	<
1207	<	procedure TIBDatabase.GetFieldNames(const TableName: string; List: TStrings);
1208	<	var
1209	<	Query: TIBSQL;
1210	<	begin
1211	<	if TableName = '' then
1212	<	IBError(ibxeNoTableName, [nil]);
1213	<	if not Connected then
1214	<	Open;
1215	<	if not FInternalTransaction.Active then
1216	<	FInternalTransaction.StartTransaction;
1217	<	Query := TIBSQL.Create(self);
1218	<	try
1219	<	Query.GoToFirstRecordOnExecute := False;
1220	<	Query.Database := Self;
1221	<	Query.Transaction := FInternalTransaction;
1222	<	Query.SQL.Text := 'Select R.RDB$FIELD_NAME ' + {do not localize}
1223	<	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
1224	<	'where R.RDB$RELATION_NAME = ' + {do not localize}
1225	<	'''' +
1226	<	FormatIdentifierValue(SQLDialect, TableName) +
1227	<	''' ' +
1228	<	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '; {do not localize}
1229	<	Query.Prepare;
1230	<	Query.ExecQuery;
1231	<	with List do
1232	<	begin
1233	<	BeginUpdate;
1234	<	try
1235	<	Clear;
1236	<	while (not Query.EOF) and (Query.Next <> nil) do
1237	<	List.Add(TrimRight(Query.Current.ByName('RDB$FIELD_NAME').AsString)); {do not localize}
1238	<	finally
1239	<	EndUpdate;
1240	<	end;
1241	<	end;
1242	<	finally
1243	<	Query.free;
1244	<	FInternalTransaction.Commit;
1245	<	end;
1246	<	end;
1247	<
1248	<	procedure TIBDatabase.GetTableNames(List: TStrings; SystemTables: Boolean);
1249	<	var
1250	<	Query : TIBSQL;
1251	<	begin
1252	<	if not (csReading in ComponentState) then
1253	<	begin
1254	<	if not Connected then
1255	<	Open;
1256	<	if not FInternalTransaction.Active then
1257	<	FInternalTransaction.StartTransaction;
1258	<	Query := TIBSQL.Create(self);
1259	<	try
1260	<	Query.GoToFirstRecordOnExecute := False;
1261	<	Query.Database := Self;
1262	<	Query.Transaction := FInternalTransaction;
1263	<	if SystemTables then
1264	<	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1265	<	' where RDB$VIEW_BLR is NULL' {do not localize}
1266	<	else
1267	<	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1268	<	' where RDB$VIEW_BLR is NULL and RDB$SYSTEM_FLAG = 0'; {do not localize}
1269	<	Query.Prepare;
1270	<	Query.ExecQuery;
1271	<	with List do
1272	<	begin
1273	<	BeginUpdate;
1274	<	try
1275	<	Clear;
1276	<	while (not Query.EOF) and (Query.Next <> nil) do
1277	<	List.Add(TrimRight(Query.Current[0].AsString));
1278	<	finally
1279	<	EndUpdate;
1280	<	end;
1281	<	end;
1282	<	finally
1283	<	Query.Free;
1284	<	FInternalTransaction.Commit;
1285	<	end;
1286	<	end;
1287	<	end;
1288	<
1289	<	{ TIBTransaction }
1290	<
1291	<	constructor TIBTransaction.Create(AOwner: TComponent);
1292	<	begin
1293	<	inherited Create(AOwner);
1294	<	FIBLoaded := False;
1295	<	CheckIBLoaded;
1296	<	FIBLoaded := True;
1297	<	CheckIBLoaded;
1298	<	FDatabases := TList.Create;
1299	<	FSQLObjects := TList.Create;
1300	<	FHandle := nil;
1301	<	FTPB := nil;
1302	<	FTPBLength := 0;
1303	<	FTRParams := TStringList.Create;
1304	<	FTRParamsChanged := True;
1305	<	TStringList(FTRParams).OnChange := TRParamsChange;
1306	<	TStringList(FTRParams).OnChanging := TRParamsChanging;
1307	<	FTimer := TTimer.Create(Self);
1308	<	FTimer.Enabled := False;
1309	<	FTimer.Interval := 0;
1310	<	FTimer.OnTimer := TimeoutTransaction;
1311	<	FDefaultAction := taCommit;
1312	<	end;
1313	<
1314	<	destructor TIBTransaction.Destroy;
1315	<	var
1316	<	i: Integer;
1317	<	begin
1318	<	if FIBLoaded then
1319	<	begin
1320	<	if InTransaction then
1321	<	EndTransaction(FDefaultAction, True);
1322	<	for i := 0 to FSQLObjects.Count - 1 do
1323	<	if FSQLObjects[i] <> nil then
1324	<	SQLObjects[i].DoTransactionFree;
1325	<	RemoveSQLObjects;
1326	<	RemoveDatabases;
1327	<	FreeMem(FTPB);
1328	<	FTPB := nil;
1329	<	FTRParams.Free;
1330	<	FSQLObjects.Free;
1331	<	FDatabases.Free;
1332	<	end;
1333	<	inherited Destroy;
1334	<	end;
1335	<
1336	<	function TIBTransaction.Call(ErrCode: ISC_STATUS;
1337	<	RaiseError: Boolean): ISC_STATUS;
1338	<	var
1339	<	i: Integer;
1340	<	begin
1341	<	result := ErrCode;
1342	<	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1343	<	Databases[i].FCanTimeout := False;
1344	<	FCanTimeout := False;
1345	<	if RaiseError and (result > 0) then
1346	<	IBDataBaseError;
1347	<	end;
1348	<
1349	<	procedure TIBTransaction.CheckDatabasesInList;
1350	<	begin
1351	<	if GetDatabaseCount = 0 then
1352	<	IBError(ibxeNoDatabasesInTransaction, [nil]);
1353	<	end;
1354	<
1355	<	procedure TIBTransaction.CheckInTransaction;
1356	<	begin
1357	<	if FStreamedActive and (not InTransaction) then
1358	<	Loaded;
1359	<	if (FHandle = nil) then
1360	<	IBError(ibxeNotInTransaction, [nil]);
1361	<	end;
1362	<
1363	<	procedure TIBTransaction.EnsureNotInTransaction;
1364	<	begin
1365	<	if csDesigning in ComponentState then
1366	<	begin
1367	<	if FHandle <> nil then
1368	<	Rollback;
1369	<	end;
1370	<	end;
1371	<
1372	<	procedure TIBTransaction.CheckNotInTransaction;
1373	<	begin
1374	<	if (FHandle <> nil) then
1375	<	IBError(ibxeInTransaction, [nil]);
1376	<	end;
1377	<
1378	<	function TIBTransaction.AddDatabase(db: TIBDatabase): Integer;
1379	<	var
1380	<	i: Integer;
1381	<	NilFound: Boolean;
1382	<	begin
1383	<	i := FindDatabase(db);
1384	<	if i <> -1 then
1385	<	begin
1386	<	result := i;
1387	<	exit;
1388	<	end;
1389	<	NilFound := False;
1390	<	i := 0;
1391	<	while (not NilFound) and (i < FDatabases.Count) do
1392	<	begin
1393	<	NilFound := (FDatabases[i] = nil);
1394	<	if (not NilFound) then
1395	<	Inc(i);
1396	<	end;
1397	<	if (NilFound) then
1398	<	begin
1399	<	FDatabases[i] := db;
1400	<	result := i;
1401	<	end
1402	<	else
1403	<	begin
1404	<	result := FDatabases.Count;
1405	<	FDatabases.Add(db);
1406	<	end;
1407	<	end;
1408	<
1409	<	function TIBTransaction.AddSQLObject(ds: TIBBase): Integer;
1410	<	begin
1411	<	result := 0;
1412	<	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
1413	<	Inc(result);
1414	<	if (result = FSQLObjects.Count) then
1415	<	FSQLObjects.Add(ds)
1416	<	else
1417	<	FSQLObjects[result] := ds;
1418	<	end;
1419	<
1420	<	procedure TIBTransaction.Commit;
1421	<	begin
1422	<	EndTransaction(TACommit, False);
1423	<	end;
1424	<
1425	<	procedure TIBTransaction.CommitRetaining;
1426	<	begin
1427	<	EndTransaction(TACommitRetaining, False);
1428	<	end;
1429	<
1430	<	procedure TIBTransaction.EndTransaction(Action: TTransactionAction;
1431	<	Force: Boolean);
1432	<	var
1433	<	status: ISC_STATUS;
1434	<	i: Integer;
1435	<	begin
1436	<	CheckInTransaction;
1437	<	if FInEndTransaction then Exit;
1438	<	FInEndTransaction := true;
1439	<	try
1440	<	case Action of
1441	<	TARollback, TACommit:
1442	<	begin
1443	<	if (HandleIsShared) and
1444	<	(Action <> FDefaultAction) and
1445	<	(not Force) then
1446	<	IBError(ibxeCantEndSharedTransaction, [nil]);
1447	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1448	<	SQLObjects[i].DoBeforeTransactionEnd;
1449	<	if InTransaction then
1450	<	begin
1451	<	if HandleIsShared then
1452	<	begin
1453	<	FHandle := nil;
1454	<	FHandleIsShared := False;
1455	<	status := 0;
1456	<	end
1457	<	else
1458	<	if (Action = TARollback) then
1459	<	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False)
1460	<	else
1461	<	status := Call(isc_commit_transaction(StatusVector, @FHandle), False);
1462	<	if ((Force) and (status > 0)) then
1463	<	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False);
1464	<	if Force then
1465	<	FHandle := nil
1466	<	else
1467	<	if (status > 0) then
1468	<	IBDataBaseError;
1469	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1470	<	SQLObjects[i].DoAfterTransactionEnd;
1471	<	end;
1472	<	end;
1473	<	TACommitRetaining:
1474	<	Call(isc_commit_retaining(StatusVector, @FHandle), True);
1475	<	TARollbackRetaining:
1476	<	Call(isc_rollback_retaining(StatusVector, @FHandle), True);
1477	<	end;
1478	<	if not (csDesigning in ComponentState) then
1479	<	begin
1480	<	case Action of
1481	<	TACommit:
1482	<	MonitorHook.TRCommit(Self);
1483	<	TARollback:
1484	<	MonitorHook.TRRollback(Self);
1485	<	TACommitRetaining:
1486	<	MonitorHook.TRCommitRetaining(Self);
1487	<	TARollbackRetaining:
1488	<	MonitorHook.TRRollbackRetaining(Self);
1489	<	end;
1490	<	end;
1491	<	finally
1492	<	FInEndTransaction := false
1493	<	end;
1494	<	end;
1495	<
1496	<	function TIBTransaction.GetDatabase(Index: Integer): TIBDatabase;
1497	<	begin
1498	<	result := FDatabases[Index];
1499	<	end;
1500	<
1501	<	function TIBTransaction.GetDatabaseCount: Integer;
1502	<	var
1503	<	i, Cnt: Integer;
1504	<	begin
1505	<	result := 0;
1506	<	Cnt := FDatabases.Count - 1;
1507	<	for i := 0 to Cnt do if FDatabases[i] <> nil then
1508	<	Inc(result);
1509	<	end;
1510	<
1511	<	function TIBTransaction.GetSQLObject(Index: Integer): TIBBase;
1512	<	begin
1513	<	result := FSQLObjects[Index];
1514	<	end;
1515	<
1516	<	function TIBTransaction.GetSQLObjectCount: Integer;
1517	<	var
1518	<	i, Cnt: Integer;
1519	<	begin
1520	<	result := 0;
1521	<	Cnt := FSQLObjects.Count - 1;
1522	<	for i := 0 to Cnt do if FSQLObjects[i] <> nil then
1523	<	Inc(result);
1524	<	end;
1525	<
1526	<	function TIBTransaction.GetInTransaction: Boolean;
1527	<	begin
1528	<	result := (FHandle <> nil);
1529	<	end;
1530	<
1531	<	function TIBTransaction.FindDatabase(db: TIBDatabase): Integer;
1532	<	var
1533	<	i: Integer;
1534	<	begin
1535	<	result := -1;
1536	<	for i := 0 to FDatabases.Count - 1 do
1537	<	if db = TIBDatabase(FDatabases[i]) then
1538	<	begin
1539	<	result := i;
1540	<	break;
1541	<	end;
1542	<	end;
1543	<
1544	<	function TIBTransaction.FindDefaultDatabase: TIBDatabase;
1545	<	var
1546	<	i: Integer;
1547	<	begin
1548	<	result := FDefaultDatabase;
1549	<	if result = nil then
1550	<	begin
1551	<	for i := 0 to FDatabases.Count - 1 do
1552	<	if (TIBDatabase(FDatabases[i]) <> nil) and
1553	<	(TIBDatabase(FDatabases[i]).DefaultTransaction = self) then
1554	<	begin
1555	<	result := TIBDatabase(FDatabases[i]);
1556	<	break;
1557	<	end;
1558	<	end;
1559	<	end;
1560	<
1561	<
1562	<	function TIBTransaction.GetIdleTimer: Integer;
1563	<	begin
1564	<	result := FTimer.Interval;
1565	<	end;
1566	<
1567	<	procedure TIBTransaction.Loaded;
1568	<	begin
1569	<	inherited Loaded;
1570	<	end;
1571	<
1572	<	procedure TIBTransaction.BeforeDatabaseDisconnect(DB: TIBDatabase);
1573	<	begin
1574	<	if InTransaction then
1575	<	EndTransaction(FDefaultAction, True);
1576	<	end;
1577	<
1578	<	procedure TIBTransaction.RemoveDatabase(Idx: Integer);
1579	<	var
1580	<	DB: TIBDatabase;
1581	<	begin
1582	<	if ((Idx >= 0) and (FDatabases[Idx] <> nil)) then
1583	<	begin
1584	<	DB := Databases[Idx];
1585	<	FDatabases[Idx] := nil;
1586	<	DB.RemoveTransaction(DB.FindTransaction(Self));
1587	<	if DB = FDefaultDatabase then
1588	<	FDefaultDatabase := nil;
1589	<	end;
1590	<	end;
1591	<
1592	<	procedure TIBTransaction.RemoveDatabases;
1593	<	var
1594	<	i: Integer;
1595	<	begin
1596	<	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1597	<	RemoveDatabase(i);
1598	<	end;
1599	<
1600	<	procedure TIBTransaction.RemoveSQLObject(Idx: Integer);
1601	<	var
1602	<	ds: TIBBase;
1603	<	begin
1604	<	if ((Idx >= 0) and (FSQLObjects[Idx] <> nil)) then
1605	<	begin
1606	<	ds := SQLObjects[Idx];
1607	<	FSQLObjects[Idx] := nil;
1608	<	ds.Transaction := nil;
1609	<	end;
1610	<	end;
1611	<
1612	<	procedure TIBTransaction.RemoveSQLObjects;
1613	<	var
1614	<	i: Integer;
1615	<	begin
1616	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1617	<	RemoveSQLObject(i);
1618	<	end;
1619	<
1620	<	procedure TIBTransaction.Rollback;
1621	<	begin
1622	<	EndTransaction(TARollback, False);
1623	<	end;
1624	<
1625	<	procedure TIBTransaction.RollbackRetaining;
1626	<	begin
1627	<	EndTransaction(TARollbackRetaining, False);
1628	<	end;
1629	<
1630	<	procedure TIBTransaction.SetActive(Value: Boolean);
1631	<	begin
1632	<	if csReading in ComponentState then
1633	<	FStreamedActive := Value
1634	<	else
1635	<	if Value and not InTransaction then
1636	<	StartTransaction
1637	<	else
1638	<	if not Value and InTransaction then
1639	<	Rollback;
1640	<	end;
1641	<
1642	<	procedure TIBTransaction.SetDefaultAction(Value: TTransactionAction);
1643	<	begin
1644	<	(*  if (Value = taRollbackRetaining) and (GetIBClientVersion < 6) then
1645	<	IBError(ibxeIB60feature, [nil]);*)
1646	<	FDefaultAction := Value;
1647	<	end;
1648	<
1649	<	procedure TIBTransaction.SetDefaultDatabase(Value: TIBDatabase);
1650	<	var
1651	<	i: integer;
1652	<	begin
1653	<	if (FDefaultDatabase <> nil) and (FDefaultDatabase <> Value) then
1654	<	begin
1655	<	i := FDefaultDatabase.FindTransaction(self);
1656	<	if (i <> -1) then
1657	<	FDefaultDatabase.RemoveTransaction(i);
1658	<	end;
1659	<	if (Value <> nil) and (FDefaultDatabase <> Value) then
1660	<	begin
1661	<	Value.AddTransaction(Self);
1662	<	AddDatabase(Value);
1663	<	for i := 0 to FSQLObjects.Count - 1 do
1664	<	if (FSQLObjects[i] <> nil) and
1665	<	(TIBBase(FSQLObjects[i]).Database = nil) then
1666	<	SetOrdProp(TIBBase(FSQLObjects[i]).Owner, 'Database', Integer(Value));
1667	<	end;
1668	<	FDefaultDatabase := Value;
1669	<	end;
1670	<
1671	<	procedure TIBTransaction.SetHandle(Value: TISC_TR_HANDLE);
1672	<	begin
1673	<	if (HandleIsShared) then
1674	<	EndTransaction(DefaultAction, True)
1675	<	else
1676	<	CheckNotInTransaction;
1677	<	FHandle := Value;
1678	<	FHandleIsShared := (Value <> nil);
1679	<	end;
1680	<
1681	<	procedure TIBTransaction.Notification( AComponent: TComponent;
1682	<	Operation: TOperation);
1683	<	var
1684	<	i: Integer;
1685	<	begin
1686	<	inherited Notification( AComponent, Operation);
1687	<	if (Operation = opRemove) and (AComponent = FDefaultDatabase) then
1688	<	begin
1689	<	i := FindDatabase(FDefaultDatabase);
1690	<	if (i <> -1) then
1691	<	RemoveDatabase(i);
1692	<	FDefaultDatabase := nil;
1693	<	end;
1694	<	end;
1695	<
1696	<	procedure TIBTransaction.SetIdleTimer(Value: Integer);
1697	<	begin
1698	<	if Value < 0 then
1699	<	IBError(ibxeTimeoutNegative, [nil])
1700	<	else
1701	<	if (Value = 0) then
1702	<	begin
1703	<	FTimer.Enabled := False;
1704	<	FTimer.Interval := 0;
1705	<	end
1706	<	else
1707	<	if (Value > 0) then
1708	<	begin
1709	<	FTimer.Interval := Value;
1710	<	if not (csDesigning in ComponentState) then
1711	<	FTimer.Enabled := True;
1712	<	end;
1713	<	end;
1714	<
1715	<	procedure TIBTransaction.SetTRParams(Value: TStrings);
1716	<	begin
1717	<	FTRParams.Assign(Value);
1718	<	end;
1719	<
1720	<	procedure TIBTransaction.StartTransaction;
1721	<	var
1722	<	pteb: PISC_TEB_ARRAY;
1723	<	TPB: String;
1724	<	i: Integer;
1725	<	begin
1726	<	CheckNotInTransaction;
1727	<	CheckDatabasesInList;
1728	<	for i := 0 to FDatabases.Count - 1 do
1729	<	if  FDatabases[i] <> nil then
1730	<	begin
1731	<	with TIBDatabase(FDatabases[i]) do
1732	<	if not Connected then
1733	<	if FStreamedConnected then
1734	<	begin
1735	<	Open;
1736	<	FStreamedConnected := False;
1737	<	end
1738	<	else
1739	<	IBError(ibxeDatabaseClosed, [nil]);
1740	<	end;
1741	<	if FTRParamsChanged then
1742	<	begin
1743	<	FTRParamsChanged := False;
1744	<	GenerateTPB(FTRParams, TPB, FTPBLength);
1745	<	if FTPBLength > 0 then
1746	<	begin
1747	<	IBAlloc(FTPB, 0, FTPBLength);
1748	<	Move(TPB[1], FTPB[0], FTPBLength);
1749	<	end;
1750	<	end;
1751	<
1752	<	pteb := nil;
1753	<	IBAlloc(pteb, 0, DatabaseCount * SizeOf(TISC_TEB));
1754	<	try
1755	<	for i := 0 to DatabaseCount - 1 do if Databases[i] <> nil then
1756	<	begin
1757	<	pteb^[i].db_handle := @(Databases[i].Handle);
1758	<	pteb^[i].tpb_length := FTPBLength;
1759	<	pteb^[i].tpb_address := FTPB;
1760	<	end;
1761	<	if Call(isc_start_multiple(StatusVector, @FHandle,
1762	<	DatabaseCount, PISC_TEB(pteb)), False) > 0 then
1763	<	begin
1764	<	FHandle := nil;
1765	<	IBDataBaseError;
1766	<	end;
1767	<	if not (csDesigning in ComponentState) then
1768	<	MonitorHook.TRStart(Self);
1769	<	finally
1770	<	FreeMem(pteb);
1771	<	end;
1772	<	end;
1773	<
1774	<	procedure TIBTransaction.TimeoutTransaction(Sender: TObject);
1775	<	begin
1776	<	if InTransaction then
1777	<	begin
1778	<	if FCanTimeout then
1779	<	begin
1780	<	EndTransaction(FDefaultAction, True);
1781	<	if Assigned(FOnIdleTimer) then
1782	<	FOnIdleTimer(Self);
1783	<	end
1784	<	else
1785	<	FCanTimeout := True;
1786	<	end;
1787	<	end;
1788	<
1789	<	procedure TIBTransaction.TRParamsChange(Sender: TObject);
1790	<	begin
1791	<	FTRParamsChanged := True;
1792	<	end;
1793	<
1794	<	procedure TIBTransaction.TRParamsChanging(Sender: TObject);
1795	<	begin
1796	<	EnsureNotInTransaction;
1797	<	CheckNotInTransaction;
1798	<	end;
1799	<
1800	<	{ TIBBase }
1801	<	constructor TIBBase.Create(AOwner: TObject);
1802	<	begin
1803	<	FOwner := AOwner;
1804	<	end;
1805	<
1806	<	destructor TIBBase.Destroy;
1807	<	begin
1808	<	SetDatabase(nil);
1809	<	SetTransaction(nil);
1810	<	inherited Destroy;
1811	<	end;
1812	<
1813	<	procedure TIBBase.CheckDatabase;
1814	<	begin
1815	<	if (FDatabase = nil) then
1816	<	IBError(ibxeDatabaseNotAssigned, [nil]);
1817	<	FDatabase.CheckActive;
1818	<	end;
1819	<
1820	<	procedure TIBBase.CheckTransaction;
1821	<	begin
1822	<	if FTransaction = nil then
1823	<	IBError(ibxeTransactionNotAssigned, [nil]);
1824	<	FTransaction.CheckInTransaction;
1825	<	end;
1826	<
1827	<	function TIBBase.GetDBHandle: PISC_DB_HANDLE;
1828	<	begin
1829	<	CheckDatabase;
1830	<	result := @FDatabase.Handle;
1831	<	end;
1832	<
1833	<	function TIBBase.GetTRHandle: PISC_TR_HANDLE;
1834	<	begin
1835	<	CheckTransaction;
1836	<	result := @FTransaction.Handle;
1837	<	end;
1838	<
1839	<	procedure TIBBase.DoAfterDatabaseConnect;
1840	<	begin
1841	<	if assigned(FAfterDatabaseConnect) then
1842	<	AfterDatabaseConnect(self);
1843	<	end;
1844	<
1845	<	procedure TIBBase.DoBeforeDatabaseDisconnect;
1846	<	begin
1847	<	if Assigned(BeforeDatabaseDisconnect) then
1848	<	BeforeDatabaseDisconnect(Self);
1849	<	end;
1850	<
1851	<	procedure TIBBase.DoAfterDatabaseDisconnect;
1852	<	begin
1853	<	if Assigned(AfterDatabaseDisconnect) then
1854	<	AfterDatabaseDisconnect(Self);
1855	<	end;
1856	<
1857	<	procedure TIBBase.DoDatabaseFree;
1858	<	begin
1859	<	if Assigned(OnDatabaseFree) then
1860	<	OnDatabaseFree(Self);
1861	<	SetDatabase(nil);
1862	<	SetTransaction(nil);
1863	<	end;
1864	<
1865	<	procedure TIBBase.DoBeforeTransactionEnd;
1866	<	begin
1867	<	if Assigned(BeforeTransactionEnd) then
1868	<	BeforeTransactionEnd(Self);
1869	<	end;
1870	<
1871	<	procedure TIBBase.DoAfterTransactionEnd;
1872	<	begin
1873	<	if Assigned(AfterTransactionEnd) then
1874	<	AfterTransactionEnd(Self);
1875	<	end;
1876	<
1877	<	procedure TIBBase.DoTransactionFree;
1878	<	begin
1879	<	if Assigned(OnTransactionFree) then
1880	<	OnTransactionFree(Self);
1881	<	FTransaction := nil;
1882	<	end;
1883	<
1884	<	procedure TIBBase.SetDatabase(Value: TIBDatabase);
1885	<	begin
1886	<	if (FDatabase <> nil) then
1887	<	FDatabase.RemoveSQLObject(FIndexInDatabase);
1888	<	FDatabase := Value;
1889	<	if (FDatabase <> nil) then
1890	<	begin
1891	<	FIndexInDatabase := FDatabase.AddSQLObject(Self);
1892	<	if (FTransaction = nil) then
1893	<	Transaction := FDatabase.FindDefaultTransaction;
1894	<	end;
1895	<	end;
1896	<
1897	<	procedure TIBBase.SetTransaction(Value: TIBTransaction);
1898	<	begin
1899	<	if (FTransaction <> nil) then
1900	<	FTransaction.RemoveSQLObject(FIndexInTransaction);
1901	<	FTransaction := Value;
1902	<	if (FTransaction <> nil) then
1903	<	begin
1904	<	FIndexInTransaction := FTransaction.AddSQLObject(Self);
1905	<	if (FDatabase = nil) then
1906	<	Database := FTransaction.FindDefaultDatabase;
1907	<	end;
1908	<	end;
1909	<
1910	<	{ GenerateDPB -
1911	<	Given a string containing a textual representation
1912	<	of the database parameters, generate a database
1913	<	parameter buffer, and return it and its length
1914	<	in DPB and DPBLength, respectively. }
1915	<
1916	<	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
1917	<	var
1918	<	i, j, pval: Integer;
1919	<	DPBVal: UShort;
1920	<	ParamName, ParamValue: string;
1921	<	begin
1922	<	{ The DPB is initially empty, with the exception that
1923	<	the DPB version must be the first byte of the string. }
1924	<	DPBLength := 1;
1925	<	DPB := Char(isc_dpb_version1);
1926	<
1927	<	{Iterate through the textual database parameters, constructing
1928	<	a DPB on-the-fly }
1929	<	for i := 0 to sl.Count - 1 do
1930	<	begin
1931	<	{ Get the parameter's name and value from the list,
1932	<	and make sure that the name is all lowercase with
1933	<	no leading 'isc_dpb_' prefix
1934	<	}
1935	<	if (Trim(sl.Names[i]) = '') then
1936	<	continue;
1937	<	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
1938	<	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
1939	<	if (Pos(DPBPrefix, ParamName) = 1) then {mbcs ok}
1940	<	Delete(ParamName, 1, Length(DPBPrefix));
1941	<	{ We want to translate the parameter name to some Integer
1942	<	value. We do this by scanning through a list of known
1943	<	database parameter names (DPBConstantNames, defined above) }
1944	<	DPBVal := 0;
1945	<	{ Find the parameter }
1946	<	for j := 1 to isc_dpb_last_dpb_constant do
1947	<	if (ParamName = DPBConstantNames[j]) then
1948	<	begin
1949	<	DPBVal := j;
1950	<	break;
1951	<	end;
1952	<	{  A database parameter either contains a string value (case 1)
1953	<	or an Integer value (case 2)
1954	<	or no value at all (case 3)
1955	<	or an error needs to be generated (case else)  }
1956	<	case DPBVal of
1957	<	isc_dpb_user_name, isc_dpb_password, isc_dpb_password_enc,
1958	<	isc_dpb_sys_user_name, isc_dpb_license, isc_dpb_encrypt_key,
1959	<	isc_dpb_lc_messages, isc_dpb_lc_ctype,
1960	<	isc_dpb_sql_role_name, isc_dpb_sql_dialect:
1961	<	begin
1962	<	if DPBVal = isc_dpb_sql_dialect then
1963	<	ParamValue[1] := Char(Ord(ParamValue[1]) - 48);
1964	<	DPB := DPB +
1965	<	Char(DPBVal) +
1966	<	Char(Length(ParamValue)) +
1967	<	ParamValue;
1968	<	Inc(DPBLength, 2 + Length(ParamValue));
1969	<	end;
1970	<	isc_dpb_num_buffers, isc_dpb_dbkey_scope, isc_dpb_force_write,
1971	<	isc_dpb_no_reserve, isc_dpb_damaged, isc_dpb_verify:
1972	<	begin
1973	<	DPB := DPB +
1974	<	Char(DPBVal) +
1975	<	#1 +
1976	<	Char(StrToInt(ParamValue));
1977	<	Inc(DPBLength, 3);
1978	<	end;
1979	<	isc_dpb_sweep:
1980	<	begin
1981	<	DPB := DPB +
1982	<	Char(DPBVal) +
1983	<	#1 +
1984	<	Char(isc_dpb_records);
1985	<	Inc(DPBLength, 3);
1986	<	end;
1987	<	isc_dpb_sweep_interval:
1988	<	begin
1989	<	pval := StrToInt(ParamValue);
1990	<	DPB := DPB +
1991	<	Char(DPBVal) +
1992	<	#4 +
1993	<	PChar(@pval)[0] +
1994	<	PChar(@pval)[1] +
1995	<	PChar(@pval)[2] +
1996	<	PChar(@pval)[3];
1997	<	Inc(DPBLength, 6);
1998	<	end;
1999	<	isc_dpb_activate_shadow, isc_dpb_delete_shadow, isc_dpb_begin_log,
2000	<	isc_dpb_quit_log:
2001	<	begin
2002	<	DPB := DPB +
2003	<	Char(DPBVal) +
2004	<	#1 + #0;
2005	<	Inc(DPBLength, 3);
2006	<	end;
2007	<	else
2008	<	begin
2009	<	if (DPBVal > 0) and
2010	<	(DPBVal <= isc_dpb_last_dpb_constant) then
2011	<	IBError(ibxeDPBConstantNotSupported, [DPBConstantNames[DPBVal]])
2012	<	else
2013	<	IBError(ibxeDPBConstantUnknownEx, [sl.Names[i]]);
2014	<	end;
2015	<	end;
2016	<	end;
2017	<	end;
2018	<
2019	<	{ GenerateTPB -
2020	<	Given a string containing a textual representation
2021	<	of the transaction parameters, generate a transaction
2022	<	parameter buffer, and return it and its length in
2023	<	TPB and TPBLength, respectively. }
2024	<	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
2025	<	var
2026	<	i, j, TPBVal, ParamLength: Integer;
2027	<	ParamName, ParamValue: string;
2028	<	begin
2029	<	TPB := '';
2030	<	if (sl.Count = 0) then
2031	<	TPBLength := 0
2032	<	else
2033	<	begin
2034	<	TPBLength := sl.Count + 1;
2035	<	TPB := TPB + Char(isc_tpb_version3);
2036	<	end;
2037	<	for i := 0 to sl.Count - 1 do
2038	<	begin
2039	<	if (Trim(sl[i]) =  '') then
2040	<	begin
2041	<	Dec(TPBLength);
2042	<	Continue;
2043	<	end;
2044	<	if (Pos('=', sl[i]) = 0) then {mbcs ok}
2045	<	ParamName := LowerCase(sl[i]) {mbcs ok}
2046	<	else
2047	<	begin
2048	<	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
2049	<	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
2050	<	end;
2051	<	if (Pos(TPBPrefix, ParamName) = 1) then {mbcs ok}
2052	<	Delete(ParamName, 1, Length(TPBPrefix));
2053	<	TPBVal := 0;
2054	<	{ Find the parameter }
2055	<	for j := 1 to isc_tpb_last_tpb_constant do
2056	<	if (ParamName = TPBConstantNames[j]) then
2057	<	begin
2058	<	TPBVal := j;
2059	<	break;
2060	<	end;
2061	<	{ Now act on it }
2062	<	case TPBVal of
2063	<	isc_tpb_consistency, isc_tpb_exclusive, isc_tpb_protected,
2064	<	isc_tpb_concurrency, isc_tpb_shared, isc_tpb_wait, isc_tpb_nowait,
2065	<	isc_tpb_read, isc_tpb_write, isc_tpb_ignore_limbo,
2066	<	isc_tpb_read_committed, isc_tpb_rec_version, isc_tpb_no_rec_version:
2067	<	TPB := TPB + Char(TPBVal);
2068	<	isc_tpb_lock_read, isc_tpb_lock_write:
2069	<	begin
2070	<	TPB := TPB + Char(TPBVal);
2071	<	{ Now set the string parameter }
2072	<	ParamLength := Length(ParamValue);
2073	<	Inc(TPBLength, ParamLength + 1);
2074	<	TPB := TPB + Char(ParamLength) + ParamValue;
2075	<	end;
2076	<	else
2077	<	begin
2078	<	if (TPBVal > 0) and
2079	<	(TPBVal <= isc_tpb_last_tpb_constant) then
2080	<	IBError(ibxeTPBConstantNotSupported, [TPBConstantNames[TPBVal]])
2081	<	else
2082	<	IBError(ibxeTPBConstantUnknownEx, [sl.Names[i]]);
2083	<	end;
2084	<	end;
2085	<	end;
2086	<	end;
2087	<
2088	<	end.
2089	<
2090	<
2091	<
2092	<
2093	<
1	>	{************************************************************************}
2	>	{                                                                        }
3	>	{       Borland Delphi Visual Component Library                          }
4	>	{       InterBase Express core components                                }
5	>	{                                                                        }
6	>	{       Copyright (c) 1998-2000 Inprise Corporation                      }
7	>	{                                                                        }
8	>	{    InterBase Express is based in part on the product                   }
9	>	{    Free IB Components, written by Gregory H. Deatz for                 }
10	>	{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
11	>	{    Free IB Components is used under license.                           }
12	>	{                                                                        }
13	>	{    The contents of this file are subject to the InterBase              }
14	>	{    Public License Version 1.0 (the "License"); you may not             }
15	>	{    use this file except in compliance with the License. You            }
16	>	{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	>	{    Software distributed under the License is distributed on            }
18	>	{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
19	>	{    express or implied. See the License for the specific language       }
20	>	{    governing rights and limitations under the License.                 }
21	>	{    The Original Code was created by InterBase Software Corporation     }
22	>	{       and its successors.                                              }
23	>	{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
24	>	{       Corporation. All Rights Reserved.                                }
25	>	{    Contributor(s): Jeff Overcash                                       }
26	>	{                                                                        }
27	>	{    IBX For Lazarus (Firebird Express)                                  }
28	>	{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	>	{    Portions created by MWA Software are copyright McCallum Whyman      }
30	>	{    Associates Ltd 2011                                                 }
31	>	{                                                                        }
32	>	{************************************************************************}
33	>
34	>	unit IBDatabase;
35	>
36	>	{$Mode Delphi}
37	>
38	>	interface
39	>
40	>	uses
41	>	{$IFDEF WINDOWS }
42	>	Windows,
43	>	{$ELSE}
44	>	unix,
45	>	{$ENDIF}
46	>	Dialogs, Controls, StdCtrls, SysUtils, Classes, Forms, ExtCtrls, IBHeader, IBExternals, DB,
47	>	IB, DBLoginDlg;
48	>
49	>	const
50	>	DPBPrefix = 'isc_dpb_';
51	>	DPBConstantNames: array[1..isc_dpb_last_dpb_constant] of string = (
52	>	'cdd_pathname',
53	>	'allocation',
54	>	'journal',
55	>	'page_size',
56	>	'num_buffers',
57	>	'buffer_length',
58	>	'debug',
59	>	'garbage_collect',
60	>	'verify',
61	>	'sweep',
62	>	'enable_journal',
63	>	'disable_journal',
64	>	'dbkey_scope',
65	>	'number_of_users',
66	>	'trace',
67	>	'no_garbage_collect',
68	>	'damaged',
69	>	'license',
70	>	'sys_user_name',
71	>	'encrypt_key',
72	>	'activate_shadow',
73	>	'sweep_interval',
74	>	'delete_shadow',
75	>	'force_write',
76	>	'begin_log',
77	>	'quit_log',
78	>	'no_reserve',
79	>	'user_name',
80	>	'password',
81	>	'password_enc',
82	>	'sys_user_name_enc',
83	>	'interp',
84	>	'online_dump',
85	>	'old_file_size',
86	>	'old_num_files',
87	>	'old_file',
88	>	'old_start_page',
89	>	'old_start_seqno',
90	>	'old_start_file',
91	>	'drop_walfile',
92	>	'old_dump_id',
93	>	'wal_backup_dir',
94	>	'wal_chkptlen',
95	>	'wal_numbufs',
96	>	'wal_bufsize',
97	>	'wal_grp_cmt_wait',
98	>	'lc_messages',
99	>	'lc_ctype',
100	>	'cache_manager',
101	>	'shutdown',
102	>	'online',
103	>	'shutdown_delay',
104	>	'reserved',
105	>	'overwrite',
106	>	'sec_attach',
107	>	'disable_wal',
108	>	'connect_timeout',
109	>	'dummy_packet_interval',
110	>	'gbak_attach',
111	>	'sql_role_name',
112	>	'set_page_buffers',
113	>	'working_directory',
114	>	'sql_dialect',
115	>	'set_db_readonly',
116	>	'set_db_sql_dialect',
117	>	'gfix_attach',
118	>	'gstat_attach'
119	>	);
120	>
121	>	TPBPrefix = 'isc_tpb_';
122	>	TPBConstantNames: array[1..isc_tpb_last_tpb_constant] of string = (
123	>	'consistency',
124	>	'concurrency',
125	>	'shared',
126	>	'protected',
127	>	'exclusive',
128	>	'wait',
129	>	'nowait',
130	>	'read',
131	>	'write',
132	>	'lock_read',
133	>	'lock_write',
134	>	'verb_time',
135	>	'commit_time',
136	>	'ignore_limbo',
137	>	'read_committed',
138	>	'autocommit',
139	>	'rec_version',
140	>	'no_rec_version',
141	>	'restart_requests',
142	>	'no_auto_undo'
143	>	);
144	>
145	>	type
146	>
147	>	TIBDatabase = class;
148	>	TIBTransaction = class;
149	>	TIBBase = class;
150	>
151	>	TIBDatabaseLoginEvent = procedure(Database: TIBDatabase;
152	>	LoginParams: TStrings) of object;
153	>
154	>	TIBFileName = type string;
155	>	{ TIBDatabase }
156	>	TIBDataBase = class(TCustomConnection)
157	>	private
158	>	FAllowStreamedConnected: boolean;
159	>	FHiddenPassword: string;
160	>	FIBLoaded: Boolean;
161	>	FOnLogin: TIBDatabaseLoginEvent;
162	>	FSQLHourGlass: Boolean;
163	>	FTraceFlags: TTraceFlags;
164	>	FDBSQLDialect: Integer;
165	>	FSQLDialect: Integer;
166	>	FOnDialectDowngradeWarning: TNotifyEvent;
167	>	FCanTimeout: Boolean;
168	>	FSQLObjects: TList;
169	>	FTransactions: TList;
170	>	FDBName: TIBFileName;
171	>	FDBParams: TStrings;
172	>	FDBParamsChanged: Boolean;
173	>	FDPB: PChar;
174	>	FDPBLength: Short;
175	>	FHandle: TISC_DB_HANDLE;
176	>	FHandleIsShared: Boolean;
177	>	FOnIdleTimer: TNotifyEvent;
178	>	FDefaultTransaction: TIBTransaction;
179	>	FInternalTransaction: TIBTransaction;
180	>	FStreamedConnected: Boolean;
181	>	FTimer: TTimer;
182	>	FUserNames: TStringList;
183	>	FDataSets: TList;
184	>	FLoginCalled: boolean;
185	>	FCharSetSizes: array of integer;
186	>	procedure EnsureInactive;
187	>	function GetDBSQLDialect: Integer;
188	>	function GetSQLDialect: Integer;
189	>	procedure SetSQLDialect(const Value: Integer);
190	>	procedure ValidateClientSQLDialect;
191	>	procedure DBParamsChange(Sender: TObject);
192	>	procedure DBParamsChanging(Sender: TObject);
193	>	function GetSQLObject(Index: Integer): TIBBase;
194	>	function GetSQLObjectCount: Integer;
195	>	function GetDBParamByDPB(const Idx: Integer): String;
196	>	function GetIdleTimer: Integer;
197	>	function GetTransaction(Index: Integer): TIBTransaction;
198	>	function GetTransactionCount: Integer;
199	>	function Login: Boolean;
200	>	procedure LoadCharSetInfo;
201	>	procedure SetDatabaseName(const Value: TIBFileName);
202	>	procedure SetDBParamByDPB(const Idx: Integer; Value: String);
203	>	procedure SetDBParams(Value: TStrings);
204	>	procedure SetDefaultTransaction(Value: TIBTransaction);
205	>	procedure SetIdleTimer(Value: Integer);
206	>	procedure TimeoutConnection(Sender: TObject);
207	>	function GetIsReadOnly: Boolean;
208	>	function AddSQLObject(ds: TIBBase): Integer;
209	>	procedure RemoveSQLObject(Idx: Integer);
210	>	procedure RemoveSQLObjects;
211	>	procedure InternalClose(Force: Boolean);
212	>
213	>	protected
214	>	procedure DoConnect; override;
215	>	procedure DoDisconnect; override;
216	>	function GetConnected: Boolean; override;
217	>	procedure CheckStreamConnect;
218	>	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
219	>	function GetDataset(Index : longint) : TDataset; override;
220	>	function GetDataSetCount : Longint; override;
221	>	procedure ReadState(Reader: TReader); override;
222	>	procedure SetConnected (Value : boolean); override;
223	>	public
224	>	constructor Create(AOwner: TComponent); override;
225	>	destructor Destroy; override;
226	>	procedure ApplyUpdates(const DataSets: array of TDataSet);
227	>	procedure CloseDataSets;
228	>	procedure CheckActive;
229	>	procedure CheckInactive;
230	>	procedure CreateDatabase;
231	>	procedure DropDatabase;
232	>	procedure ForceClose;
233	>	procedure GetFieldNames(const TableName: string; List: TStrings);
234	>	procedure GetTableNames(List: TStrings; SystemTables: Boolean = False);
235	>	function IndexOfDBConst(st: String): Integer;
236	>	function TestConnected: Boolean;
237	>	procedure CheckDatabaseName;
238	>	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
239	>	function AddTransaction(TR: TIBTransaction): Integer;
240	>	function FindTransaction(TR: TIBTransaction): Integer;
241	>	function FindDefaultTransaction(): TIBTransaction;
242	>	procedure RemoveTransaction(Idx: Integer);
243	>	procedure RemoveTransactions;
244	>	procedure SetHandle(Value: TISC_DB_HANDLE);
245	>
246	>	property Handle: TISC_DB_HANDLE read FHandle;
247	>	property IsReadOnly: Boolean read GetIsReadOnly;
248	>	property DBParamByDPB[const Idx: Integer]: String read GetDBParamByDPB
249	>	write SetDBParamByDPB;
250	>	property SQLObjectCount: Integer read GetSQLObjectCount;
251	>	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
252	>	property HandleIsShared: Boolean read FHandleIsShared;
253	>	property TransactionCount: Integer read GetTransactionCount;
254	>	property Transactions[Index: Integer]: TIBTransaction read GetTransaction;
255	>	property InternalTransaction: TIBTransaction read FInternalTransaction;
256	>
257	>	published
258	>	property Connected;
259	>	property AllowStreamedConnected: boolean read FAllowStreamedConnected
260	>	write FAllowStreamedConnected;
261	>	property DatabaseName: TIBFileName read FDBName write SetDatabaseName;
262	>	property Params: TStrings read FDBParams write SetDBParams;
263	>	property LoginPrompt default True;
264	>	property DefaultTransaction: TIBTransaction read FDefaultTransaction
265	>	write SetDefaultTransaction;
266	>	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer;
267	>	property SQLDialect : Integer read GetSQLDialect write SetSQLDialect default 3;
268	>	property SQLHourGlass: Boolean read FSQLHourGlass write FSQLHourGlass default true;
269	>	property DBSQLDialect : Integer read FDBSQLDialect;
270	>	property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
271	>	property AfterConnect;
272	>	property AfterDisconnect;
273	>	property BeforeConnect;
274	>	property BeforeDisconnect;
275	>	property OnLogin: TIBDatabaseLoginEvent read FOnLogin write FOnLogin;
276	>	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
277	>	property OnDialectDowngradeWarning: TNotifyEvent read FOnDialectDowngradeWarning write FOnDialectDowngradeWarning;
278	>	end;
279	>
280	>	{ TIBTransaction }
281	>
282	>	TTransactionAction         = (TARollback, TACommit, TARollbackRetaining, TACommitRetaining);
283	>
284	>	TIBTransaction = class(TComponent)
285	>	private
286	>	FAfterDelete: TNotifyEvent;
287	>	FAfterEdit: TNotifyEvent;
288	>	FAfterExecQuery: TNotifyEvent;
289	>	FAfterInsert: TNotifyEvent;
290	>	FAfterPost: TNotifyEvent;
291	>	FAfterTransactionEnd: TNotifyEvent;
292	>	FBeforeTransactionEnd: TNotifyEvent;
293	>	FIBLoaded: Boolean;
294	>	FCanTimeout         : Boolean;
295	>	FDatabases          : TList;
296	>	FOnStartTransaction: TNotifyEvent;
297	>	FSQLObjects         : TList;
298	>	FDefaultDatabase    : TIBDatabase;
299	>	FHandle             : TISC_TR_HANDLE;
300	>	FHandleIsShared     : Boolean;
301	>	FOnIdleTimer          : TNotifyEvent;
302	>	FStreamedActive     : Boolean;
303	>	FTPB                : PChar;
304	>	FTPBLength          : Short;
305	>	FTimer              : TTimer;
306	>	FDefaultAction      : TTransactionAction;
307	>	FTRParams           : TStrings;
308	>	FTRParamsChanged    : Boolean;
309	>	FInEndTransaction   : boolean;
310	>	FEndAction          : TTransactionAction;
311	>	procedure DoBeforeTransactionEnd;
312	>	procedure DoAfterTransactionEnd;
313	>	procedure DoOnStartTransaction;
314	>	procedure DoAfterExecQuery(Sender: TObject);
315	>	procedure DoAfterEdit(Sender: TObject);
316	>	procedure DoAfterDelete(Sender: TObject);
317	>	procedure DoAfterInsert(Sender: TObject);
318	>	procedure DoAfterPost(Sender: TObject);
319	>	procedure EnsureNotInTransaction;
320	>	procedure EndTransaction(Action: TTransactionAction; Force: Boolean);
321	>	function GetDatabase(Index: Integer): TIBDatabase;
322	>	function GetDatabaseCount: Integer;
323	>	function GetSQLObject(Index: Integer): TIBBase;
324	>	function GetSQLObjectCount: Integer;
325	>	function GetInTransaction: Boolean;
326	>	function GetIdleTimer: Integer;
327	>	procedure BeforeDatabaseDisconnect(DB: TIBDatabase);
328	>	procedure SetActive(Value: Boolean);
329	>	procedure SetDefaultAction(Value: TTransactionAction);
330	>	procedure SetDefaultDatabase(Value: TIBDatabase);
331	>	procedure SetIdleTimer(Value: Integer);
332	>	procedure SetTRParams(Value: TStrings);
333	>	procedure TimeoutTransaction(Sender: TObject);
334	>	procedure TRParamsChange(Sender: TObject);
335	>	procedure TRParamsChanging(Sender: TObject);
336	>	function AddSQLObject(ds: TIBBase): Integer;
337	>	procedure RemoveSQLObject(Idx: Integer);
338	>	procedure RemoveSQLObjects;
339	>
340	>	protected
341	>	procedure Loaded; override;
342	>	procedure SetHandle(Value: TISC_TR_HANDLE);
343	>	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
344	>
345	>	public
346	>	constructor Create(AOwner: TComponent); override;
347	>	destructor Destroy; override;
348	>	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
349	>	procedure Commit;
350	>	procedure CommitRetaining;
351	>	procedure Rollback;
352	>	procedure RollbackRetaining;
353	>	procedure StartTransaction;
354	>	procedure CheckInTransaction;
355	>	procedure CheckNotInTransaction;
356	>
357	>	function AddDatabase(db: TIBDatabase): Integer;
358	>	function FindDatabase(db: TIBDatabase): Integer;
359	>	function FindDefaultDatabase: TIBDatabase;
360	>	function GetEndAction: TTransactionAction;
361	>	procedure RemoveDatabase(Idx: Integer);
362	>	procedure RemoveDatabases;
363	>	procedure CheckDatabasesInList;
364	>
365	>	property DatabaseCount: Integer read GetDatabaseCount;
366	>	property Databases[Index: Integer]: TIBDatabase read GetDatabase;
367	>	property SQLObjectCount: Integer read GetSQLObjectCount;
368	>	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
369	>	property Handle: TISC_TR_HANDLE read FHandle;
370	>	property HandleIsShared: Boolean read FHandleIsShared;
371	>	property InTransaction: Boolean read GetInTransaction;
372	>	property TPB: PChar read FTPB;
373	>	property TPBLength: Short read FTPBLength;
374	>	published
375	>	property Active: Boolean read GetInTransaction write SetActive;
376	>	property DefaultDatabase: TIBDatabase read FDefaultDatabase
377	>	write SetDefaultDatabase;
378	>	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer default 0;
379	>	property DefaultAction: TTransactionAction read FDefaultAction write SetDefaultAction default taCommit;
380	>	property Params: TStrings read FTRParams write SetTRParams;
381	>	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
382	>	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
383	>	write FBeforeTransactionEnd;
384	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
385	>	write FAfterTransactionEnd;
386	>	property OnStartTransaction: TNotifyEvent read FOnStartTransaction
387	>	write FOnStartTransaction;
388	>	property AfterExecQuery: TNotifyEvent read FAfterExecQuery
389	>	write FAfterExecQuery;
390	>	property AfterEdit: TNotifyEvent read FAfterEdit write FAfterEdit;
391	>	property AfterDelete: TNotifyEvent read FAfterDelete write FAfterDelete;
392	>	property AfterInsert: TNotifyEvent read FAfterInsert write FAfterInsert;
393	>	property AfterPost: TNotifyEvent read FAfterPost write FAfterPost;
394	>	end;
395	>
396	>	TTransactionEndEvent = procedure(Sender:TObject; Action: TTransactionAction) of object;
397	>	TBeforeDatabaseConnectEvent = procedure (Sender: TObject; DBParams: TStrings;
398	>	var DBName: string) of object;
399	>
400	>	{ TIBBase }
401	>
402	>	{ Virtually all components in IB are "descendents" of TIBBase.
403	>	It is to more easily manage the database and transaction
404	>	connections. }
405	>	TIBBase = class(TObject)
406	>	protected
407	>	FBeforeDatabaseConnect: TBeforeDatabaseConnectEvent;
408	>	FDatabase: TIBDatabase;
409	>	FIndexInDatabase: Integer;
410	>	FTransaction: TIBTransaction;
411	>	FIndexInTransaction: Integer;
412	>	FOwner: TObject;
413	>	FBeforeDatabaseDisconnect: TNotifyEvent;
414	>	FAfterDatabaseDisconnect: TNotifyEvent;
415	>	FAfterDatabaseConnect: TNotifyEvent;
416	>	FOnDatabaseFree: TNotifyEvent;
417	>	FBeforeTransactionEnd: TTransactionEndEvent;
418	>	FAfterTransactionEnd: TNotifyEvent;
419	>	FOnTransactionFree: TNotifyEvent;
420	>
421	>	procedure DoBeforeDatabaseConnect(DBParams: TStrings;
422	>	var DBName: string); virtual;
423	>	procedure DoAfterDatabaseConnect; virtual;
424	>	procedure DoBeforeDatabaseDisconnect; virtual;
425	>	procedure DoAfterDatabaseDisconnect; virtual;
426	>	procedure DoDatabaseFree; virtual;
427	>	procedure DoBeforeTransactionEnd(Action: TTransactionAction); virtual;
428	>	procedure DoAfterTransactionEnd; virtual;
429	>	procedure DoTransactionFree; virtual;
430	>	function GetDBHandle: PISC_DB_HANDLE; virtual;
431	>	function GetTRHandle: PISC_TR_HANDLE; virtual;
432	>	procedure SetDatabase(Value: TIBDatabase); virtual;
433	>	procedure SetTransaction(Value: TIBTransaction); virtual;
434	>	public
435	>	constructor Create(AOwner: TObject);
436	>	destructor Destroy; override;
437	>	procedure CheckDatabase; virtual;
438	>	procedure CheckTransaction; virtual;
439	>	procedure DoAfterExecQuery(Sender: TObject); virtual;
440	>	procedure DoAfterEdit(Sender: TObject); virtual;
441	>	procedure DoAfterDelete(Sender: TObject); virtual;
442	>	procedure DoAfterInsert(Sender: TObject); virtual;
443	>	procedure DoAfterPost(Sender: TObject); virtual;
444	>	function GetCharSetSize(CharSetID: integer): integer;
445	>	public
446	>	property BeforeDatabaseConnect: TBeforeDatabaseConnectEvent read FBeforeDatabaseConnect
447	>	write FBeforeDatabaseConnect;
448	>	property AfterDatabaseConnect: TNotifyEvent read FAfterDatabaseConnect
449	>	write FAfterDatabaseConnect;
450	>	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
451	>	write FBeforeDatabaseDisconnect;
452	>	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
453	>	write FAfterDatabaseDisconnect;
454	>	property OnDatabaseFree: TNotifyEvent read FOnDatabaseFree write FOnDatabaseFree;
455	>	property BeforeTransactionEnd: TTransactionEndEvent read FBeforeTransactionEnd write FBeforeTransactionEnd;
456	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd write FAfterTransactionEnd;
457	>	property OnTransactionFree: TNotifyEvent read FOnTransactionFree write FOnTransactionFree;
458	>	property Database: TIBDatabase read FDatabase
459	>	write SetDatabase;
460	>	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
461	>	property Owner: TObject read FOwner;
462	>	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
463	>	property Transaction: TIBTransaction read FTransaction
464	>	write SetTransaction;
465	>	end;
466	>
467	>	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
468	>	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
469	>
470	>
471	>	implementation
472	>
473	>	uses IBIntf, IBSQLMonitor, IBCustomDataSet, IBDatabaseInfo, IBSQL, IBUtils,
474	>	typInfo;
475	>
476	>	{ TIBDatabase }
477	>
478	>	constructor TIBDataBase.Create(AOwner: TComponent);
479	>	{$ifdef WINDOWS}
480	>	var acp: uint;
481	>	{$endif}
482	>	begin
483	>	inherited Create(AOwner);
484	>	FIBLoaded := False;
485	>	CheckIBLoaded;
486	>	FIBLoaded := True;
487	>	LoginPrompt := True;
488	>	FSQLObjects := TList.Create;
489	>	FTransactions := TList.Create;
490	>	FDBName := '';
491	>	FDBParams := TStringList.Create;
492	>	FSQLHourGlass := true;
493	>	{$ifdef UNIX}
494	>	if csDesigning in ComponentState then
495	>	FDBParams.Add('lc_ctype=UTF-8');
496	>	{$else}
497	>	{$ifdef WINDOWS}
498	>	if csDesigning in ComponentState then
499	>	begin
500	>	acp := GetACP;
501	>	if (acp >= 1250) and (acp <= 1254) then
502	>	FDBParams.Values['lc_ctype'] := Format('WIN%d',[acp]);
503	>	end;
504	>	{$endif}
505	>	{$endif}
506	>	FDBParamsChanged := True;
507	>	TStringList(FDBParams).OnChange := DBParamsChange;
508	>	TStringList(FDBParams).OnChanging := DBParamsChanging;
509	>	FDPB := nil;
510	>	FHandle := nil;
511	>	FUserNames := nil;
512	>	FInternalTransaction := TIBTransaction.Create(self);
513	>	FInternalTransaction.DefaultDatabase := Self;
514	>	FTimer := TTimer.Create(Self);
515	>	FTimer.Enabled := False;
516	>	FTimer.Interval := 0;
517	>	FTimer.OnTimer := TimeoutConnection;
518	>	FDBSQLDialect := 1;
519	>	FSQLDialect := 3;
520	>	FTraceFlags := [];
521	>	FDataSets := TList.Create;
522	>	CheckStreamConnect;
523	>	end;
524	>
525	>	destructor TIBDataBase.Destroy;
526	>	var
527	>	i: Integer;
528	>	begin
529	>	if FIBLoaded then
530	>	begin
531	>	IdleTimer := 0;
532	>	if FHandle <> nil then
533	>	ForceClose;
534	>	for i := 0 to FSQLObjects.Count - 1 do
535	>	if FSQLObjects[i] <> nil then
536	>	SQLObjects[i].DoDatabaseFree;
537	>	RemoveSQLObjects;
538	>	RemoveTransactions;
539	>	FInternalTransaction.Free;
540	>	FreeMem(FDPB);
541	>	FDPB := nil;
542	>	FDBParams.Free;
543	>	FSQLObjects.Free;
544	>	FUserNames.Free;
545	>	FTransactions.Free;
546	>	end;
547	>	FDataSets.Free;
548	>	inherited Destroy;
549	>	end;
550	>
551	>	function TIBDataBase.Call(ErrCode: ISC_STATUS; RaiseError: Boolean
552	>	): ISC_STATUS;
553	>	begin
554	>	result := ErrCode;
555	>	FCanTimeout := False;
556	>	if RaiseError and (ErrCode > 0) then
557	>	IBDataBaseError;
558	>	end;
559	>
560	>	procedure TIBDataBase.CheckActive;
561	>	begin
562	>	if StreamedConnected and (not Connected) then
563	>	Loaded;
564	>	if FHandle = nil then
565	>	IBError(ibxeDatabaseClosed, [nil]);
566	>	end;
567	>
568	>	procedure TIBDataBase.EnsureInactive;
569	>	begin
570	>	if csDesigning in ComponentState then
571	>	begin
572	>	if FHandle <> nil then
573	>	Close;
574	>	end
575	>	end;
576	>
577	>	procedure TIBDataBase.CheckInactive;
578	>	begin
579	>	if FHandle <> nil then
580	>	IBError(ibxeDatabaseOpen, [nil]);
581	>	end;
582	>
583	>	procedure TIBDataBase.CheckDatabaseName;
584	>	begin
585	>	if (FDBName = '') then
586	>	IBError(ibxeDatabaseNameMissing, [nil]);
587	>	end;
588	>
589	>	function TIBDataBase.AddSQLObject(ds: TIBBase): Integer;
590	>	begin
591	>	result := 0;
592	>	if (ds.Owner is TIBCustomDataSet) then
593	>	FDataSets.Add(ds.Owner);
594	>	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
595	>	Inc(result);
596	>	if (result = FSQLObjects.Count) then
597	>	FSQLObjects.Add(ds)
598	>	else
599	>	FSQLObjects[result] := ds;
600	>	end;
601	>
602	>	function TIBDataBase.AddTransaction(TR: TIBTransaction): Integer;
603	>	begin
604	>	result := FindTransaction(TR);
605	>	if result <> -1 then
606	>	begin
607	>	result := -1;
608	>	exit;
609	>	end;
610	>	result := 0;
611	>	while (result < FTransactions.Count) and (FTransactions[result] <> nil) do
612	>	Inc(result);
613	>	if (result = FTransactions.Count) then
614	>	FTransactions.Add(TR)
615	>	else
616	>	FTransactions[result] := TR;
617	>	end;
618	>
619	>	procedure TIBDataBase.DoDisconnect;
620	>	begin
621	>	if Connected then
622	>	InternalClose(False);
623	>	FDBSQLDialect := 1;
624	>	SetLength(FCharSetSizes,0);
625	>	end;
626	>
627	>	procedure TIBDataBase.CreateDatabase;
628	>	var
629	>	tr_handle: TISC_TR_HANDLE;
630	>	begin
631	>	CheckInactive;
632	>	tr_handle := nil;
633	>	Call(
634	>	isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0,
635	>	PChar('CREATE DATABASE ''' + FDBName + ''' ' + {do not localize}
636	>	Params.Text), SQLDialect, nil),
637	>	True);
638	>	end;
639	>
640	>	procedure TIBDataBase.DropDatabase;
641	>	begin
642	>	CheckActive;
643	>	Call(isc_drop_database(StatusVector, @FHandle), True);
644	>	end;
645	>
646	>	procedure TIBDataBase.DBParamsChange(Sender: TObject);
647	>	begin
648	>	FDBParamsChanged := True;
649	>	end;
650	>
651	>	procedure TIBDataBase.DBParamsChanging(Sender: TObject);
652	>	begin
653	>	EnsureInactive;
654	>	CheckInactive;
655	>	end;
656	>
657	>	function TIBDataBase.FindTransaction(TR: TIBTransaction): Integer;
658	>	var
659	>	i: Integer;
660	>	begin
661	>	result := -1;
662	>	for i := 0 to FTransactions.Count - 1 do
663	>	if TR = Transactions[i] then
664	>	begin
665	>	result := i;
666	>	break;
667	>	end;
668	>	end;
669	>
670	>	function TIBDataBase.FindDefaultTransaction: TIBTransaction;
671	>	var
672	>	i: Integer;
673	>	begin
674	>	result := FDefaultTransaction;
675	>	if result = nil then
676	>	begin
677	>	for i := 0 to FTransactions.Count - 1 do
678	>	if (Transactions[i] <> nil) and
679	>	(TIBTransaction(Transactions[i]).DefaultDatabase = self) and
680	>	(TIBTransaction(Transactions[i]) <> FInternalTransaction) then
681	>	begin
682	>	result := TIBTransaction(Transactions[i]);
683	>	break;
684	>	end;
685	>	end;
686	>	end;
687	>
688	>	procedure TIBDataBase.ForceClose;
689	>	begin
690	>	if Connected then
691	>	InternalClose(True);
692	>	end;
693	>
694	>	function TIBDataBase.GetConnected: Boolean;
695	>	begin
696	>	result := FHandle <> nil;
697	>	end;
698	>
699	>	function TIBDataBase.GetSQLObject(Index: Integer): TIBBase;
700	>	begin
701	>	result := FSQLObjects[Index];
702	>	end;
703	>
704	>	function TIBDataBase.GetSQLObjectCount: Integer;
705	>	var
706	>	i: Integer;
707	>	begin
708	>	result := 0;
709	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
710	>	Inc(result);
711	>	end;
712	>
713	>	function TIBDataBase.GetDBParamByDPB( const Idx: Integer): String;
714	>	var
715	>	ConstIdx, EqualsIdx: Integer;
716	>	begin
717	>	if (Idx > 0) and (Idx <= isc_dpb_last_dpb_constant) then
718	>	begin
719	>	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
720	>	if ConstIdx = -1 then
721	>	result := ''
722	>	else
723	>	begin
724	>	result := Params[ConstIdx];
725	>	EqualsIdx := Pos('=', result); {mbcs ok}
726	>	if EqualsIdx = 0 then
727	>	result := ''
728	>	else
729	>	result := Copy(result, EqualsIdx + 1, Length(result));
730	>	end;
731	>	end
732	>	else
733	>	result := '';
734	>	end;
735	>
736	>	function TIBDataBase.GetIdleTimer: Integer;
737	>	begin
738	>	result := FTimer.Interval;
739	>	end;
740	>
741	>	function TIBDataBase.GetTransaction(Index: Integer): TIBTransaction;
742	>	begin
743	>	result := FTransactions[Index];
744	>	end;
745	>
746	>	function TIBDataBase.GetTransactionCount: Integer;
747	>	var
748	>	i: Integer;
749	>	begin
750	>	result := 0;
751	>	for i := 0 to FTransactions.Count - 1 do
752	>	if FTransactions[i] <> nil then
753	>	Inc(result);
754	>	end;
755	>
756	>	function TIBDataBase.IndexOfDBConst(st: String): Integer;
757	>	var
758	>	i, pos_of_str: Integer;
759	>	begin
760	>	result := -1;
761	>	for i := 0 to Params.Count - 1 do
762	>	begin
763	>	pos_of_str := Pos(st, AnsiLowerCase(Params[i])); {mbcs ok}
764	>	if (pos_of_str = 1) or (pos_of_str = Length(DPBPrefix) + 1) then
765	>	begin
766	>	result := i;
767	>	break;
768	>	end;
769	>	end;
770	>	end;
771	>
772	>	procedure TIBDataBase.InternalClose(Force: Boolean);
773	>	var
774	>	i: Integer;
775	>	begin
776	>	CheckActive;
777	>	{ Tell all connected transactions that we're disconnecting.
778	>	This is so transactions can commit/rollback, accordingly
779	>	}
780	>	for i := 0 to FTransactions.Count - 1 do
781	>	begin
782	>	try
783	>	if FTransactions[i] <> nil then
784	>	Transactions[i].BeforeDatabaseDisconnect(Self);
785	>	except
786	>	if not Force then
787	>	raise;
788	>	end;
789	>	end;
790	>	for i := 0 to FSQLObjects.Count - 1 do
791	>	begin
792	>	try
793	>	if FSQLObjects[i] <> nil then
794	>	SQLObjects[i].DoBeforeDatabaseDisconnect;
795	>	except
796	>	if not Force then
797	>	raise;
798	>	end;
799	>	end;
800	>
801	>	if (not HandleIsShared) and
802	>	(Call(isc_detach_database(StatusVector, @FHandle), False) > 0) and
803	>	(not Force) then
804	>	IBDataBaseError
805	>	else
806	>	begin
807	>	FHandle := nil;
808	>	FHandleIsShared := False;
809	>	end;
810	>
811	>	if not (csDesigning in ComponentState) then
812	>	MonitorHook.DBDisconnect(Self);
813	>
814	>	for i := 0 to FSQLObjects.Count - 1 do
815	>	if FSQLObjects[i] <> nil then
816	>	SQLObjects[i].DoAfterDatabaseDisconnect;
817	>	end;
818	>
819	>	procedure TIBDataBase.LoadCharSetInfo;
820	>	var Query: TIBSQL;
821	>	i: integer;
822	>	begin
823	>	if not FInternalTransaction.Active then
824	>	FInternalTransaction.StartTransaction;
825	>	Query := TIBSQL.Create(self);
826	>	try
827	>	Query.Database := Self;
828	>	Query.Transaction := FInternalTransaction;
829	>	Query.SQL.Text := 'Select RDB$CHARACTER_SET_ID, RDB$BYTES_PER_CHARACTER ' +
830	>	'From RDB$CHARACTER_SETS Order by 1 DESC'; {do not localize}
831	>	Query.Prepare;
832	>	Query.ExecQuery;
833	>	if not Query.EOF then
834	>	begin
835	>	SetLength(FCharSetSizes,Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger + 1);
836	>	for i := 0 to Length(FCharSetSizes) - 1 do FCharSetSizes[i] := 1;
837	>	repeat
838	>	FCharSetSizes[Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger] :=
839	>	Query.FieldByName('RDB$BYTES_PER_CHARACTER').AsInteger;
840	>	Query.Next;
841	>	until Query.EOF;
842	>	end;
843	>	finally
844	>	Query.free;
845	>	FInternalTransaction.Commit;
846	>	end;
847	>	end;
848	>
849	>	procedure TIBDataBase.CheckStreamConnect;
850	>	var
851	>	i: integer;
852	>	begin
853	>	try
854	>	if not (csDesigning in ComponentState) and StreamedConnected and (not Connected) then
855	>	begin
856	>	for i := 0 to FTransactions.Count - 1 do
857	>	if  FTransactions[i] <> nil then
858	>	begin
859	>	with TIBTransaction(FTransactions[i]) do
860	>	if not Active then
861	>	if FStreamedActive and not InTransaction then
862	>	begin
863	>	StartTransaction;
864	>	FStreamedActive := False;
865	>	end;
866	>	end;
867	>	if (FDefaultTransaction <> nil) and
868	>	(FDefaultTransaction.FStreamedActive) and
869	>	(not FDefaultTransaction.InTransaction) then
870	>	FDefaultTransaction.StartTransaction;
871	>	FStreamedConnected := False;
872	>	end;
873	>	except
874	>	if csDesigning in ComponentState then
875	>	Application.HandleException(Self)
876	>	else
877	>	raise;
878	>	end;
879	>	end;
880	>
881	>	procedure TIBDataBase.Notification(AComponent: TComponent;
882	>	Operation: TOperation);
883	>	var
884	>	i: Integer;
885	>	begin
886	>	inherited Notification( AComponent, Operation);
887	>	if (Operation = opRemove) and (AComponent = FDefaultTransaction) then
888	>	begin
889	>	i := FindTransaction(FDefaultTransaction);
890	>	if (i <> -1) then
891	>	RemoveTransaction(i);
892	>	FDefaultTransaction := nil;
893	>	end;
894	>	end;
895	>
896	>	function TIBDataBase.Login: Boolean;
897	>	var
898	>	IndexOfUser, IndexOfPassword: Integer;
899	>	Username, Password, OldPassword: String;
900	>	LoginParams: TStrings;
901	>
902	>	procedure HidePassword;
903	>	var
904	>	I: Integer;
905	>	IndexAt: Integer;
906	>	begin
907	>	IndexAt := 0;
908	>	for I := 0 to Params.Count -1 do
909	>	if Pos('password', LowerCase(Trim(Params.Names[i]))) = 1 then {mbcs ok}
910	>	begin
911	>	FHiddenPassword := Params.Values[Params.Names[i]];
912	>	IndexAt := I;
913	>	break;
914	>	end;
915	>	if IndexAt <> 0 then
916	>	Params.Delete(IndexAt);
917	>	end;
918	>
919	>	begin
920	>	Result := false;
921	>	if FLoginCalled then Exit;
922	>	FLoginCalled := true;
923	>	try
924	>	if Assigned(FOnLogin) and not (csDesigning in ComponentState) then
925	>	begin
926	>	result := True;
927	>	LoginParams := TStringList.Create;
928	>	try
929	>	LoginParams.Assign(Params);
930	>	FOnLogin(Self, LoginParams);
931	>	Params.Assign (LoginParams);
932	>	HidePassword;
933	>	finally
934	>	LoginParams.Free;
935	>	end;
936	>	end
937	>	else
938	>	begin
939	>	IndexOfUser := IndexOfDBConst(DPBConstantNames[isc_dpb_user_name]);
940	>	if IndexOfUser <> -1 then
941	>	Username := Copy(Params[IndexOfUser],
942	>	Pos('=', Params[IndexOfUser]) + 1, {mbcs ok}
943	>	Length(Params[IndexOfUser]));
944	>	IndexOfPassword := IndexOfDBConst(DPBConstantNames[isc_dpb_password]);
945	>	if IndexOfPassword <> -1 then
946	>	begin
947	>	Password := Copy(Params[IndexOfPassword],
948	>	Pos('=', Params[IndexOfPassword]) + 1, {mbcs ok}
949	>	Length(Params[IndexOfPassword]));
950	>	OldPassword := password;
951	>	end;
952	>	result := LoginDialogEx(DatabaseName, Username, Password, False);
953	>	if result then
954	>	begin
955	>	if IndexOfUser = -1 then
956	>	Params.Add(DPBConstantNames[isc_dpb_user_name] + '=' + Username)
957	>	else
958	>	Params[IndexOfUser] := DPBConstantNames[isc_dpb_user_name] +
959	>	'=' + Username;
960	>	if (Password = OldPassword) then
961	>	FHiddenPassword := ''
962	>	else
963	>	begin
964	>	FHiddenPassword := Password;
965	>	if OldPassword <> '' then
966	>	HidePassword;
967	>	end;
968	>	end;
969	>	end;
970	>	finally
971	>	FLoginCalled := false
972	>	end;
973	>	end;
974	>
975	>	procedure TIBDataBase.DoConnect;
976	>	var
977	>	DPB: String;
978	>	TempDBParams: TStrings;
979	>	I: integer;
980	>	aDBName: string;
981	>	begin
982	>	CheckInactive;
983	>	CheckDatabaseName;
984	>	if (not LoginPrompt) and (FHiddenPassword <> '') then
985	>	begin
986	>	FHiddenPassword := '';
987	>	FDBParamsChanged := True;
988	>	end;
989	>	{ Use builtin login prompt if requested }
990	>	if (LoginPrompt or (csDesigning in ComponentState)) and not Login then
991	>	IBError(ibxeOperationCancelled, [nil]);
992	>
993	>	TempDBParams := TStringList.Create;
994	>	try
995	>	TempDBParams.Assign(FDBParams);
996	>	aDBName := FDBName;
997	>	{Opportuning to override defaults}
998	>	for i := 0 to FSQLObjects.Count - 1 do
999	>	begin
1000	>	if FSQLObjects[i] <> nil then
1001	>	SQLObjects[i].DoBeforeDatabaseConnect(TempDBParams,aDBName);
1002	>	end;
1003	>
1004	>	{ Generate a new DPB if necessary }
1005	>	if (FDBParamsChanged or (TempDBParams.Text <> FDBParams.Text)) then
1006	>	begin
1007	>	FDBParamsChanged := False;
1008	>	if (not LoginPrompt and not (csDesigning in ComponentState)) or (FHiddenPassword = '') then
1009	>	GenerateDPB(TempDBParams, DPB, FDPBLength)
1010	>	else
1011	>	begin
1012	>	TempDBParams.Add('password=' + FHiddenPassword);
1013	>	GenerateDPB(TempDBParams, DPB, FDPBLength);
1014	>	end;
1015	>	IBAlloc(FDPB, 0, FDPBLength);
1016	>	Move(DPB[1], FDPB[0], FDPBLength);
1017	>	end;
1018	>	finally
1019	>	TempDBParams.Free;
1020	>	end;
1021	>	if Call(isc_attach_database(StatusVector, Length(aDBName),
1022	>	PChar(aDBName), @FHandle,
1023	>	FDPBLength, FDPB), False) > 0 then
1024	>	begin
1025	>	FHandle := nil;
1026	>	IBDataBaseError;
1027	>	end;
1028	>	if not (csDesigning in ComponentState) then
1029	>	FDBName := aDBName; {Synchronise at run time}
1030	>	FDBSQLDialect := GetDBSQLDialect;
1031	>	ValidateClientSQLDialect;
1032	>	for i := 0 to FSQLObjects.Count - 1 do
1033	>	begin
1034	>	if FSQLObjects[i] <> nil then
1035	>	SQLObjects[i].DoAfterDatabaseConnect;
1036	>	end;
1037	>	if not (csDesigning in ComponentState) then
1038	>	MonitorHook.DBConnect(Self);
1039	>	LoadCharSetInfo;
1040	>	end;
1041	>
1042	>	procedure TIBDataBase.RemoveSQLObject(Idx: Integer);
1043	>	var
1044	>	ds: TIBBase;
1045	>	begin
1046	>	if (Idx >= 0) and (FSQLObjects[Idx] <> nil) then
1047	>	begin
1048	>	ds := SQLObjects[Idx];
1049	>	FSQLObjects[Idx] := nil;
1050	>	ds.Database := nil;
1051	>	if (ds.owner is TDataSet) then
1052	>	FDataSets.Remove(TDataSet(ds.Owner));
1053	>	end;
1054	>	end;
1055	>
1056	>	procedure TIBDataBase.RemoveSQLObjects;
1057	>	var
1058	>	i: Integer;
1059	>	begin
1060	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1061	>	begin
1062	>	RemoveSQLObject(i);
1063	>	if (TIBBase(FSQLObjects[i]).owner is TDataSet) then
1064	>	FDataSets.Remove(TDataSet(TIBBase(FSQLObjects[i]).owner));
1065	>	end;
1066	>	end;
1067	>
1068	>	procedure TIBDataBase.RemoveTransaction(Idx: Integer);
1069	>	var
1070	>	TR: TIBTransaction;
1071	>	begin
1072	>	if ((Idx >= 0) and (FTransactions[Idx] <> nil)) then
1073	>	begin
1074	>	TR := Transactions[Idx];
1075	>	FTransactions[Idx] := nil;
1076	>	TR.RemoveDatabase(TR.FindDatabase(Self));
1077	>	if TR = FDefaultTransaction then
1078	>	FDefaultTransaction := nil;
1079	>	end;
1080	>	end;
1081	>
1082	>	procedure TIBDataBase.RemoveTransactions;
1083	>	var
1084	>	i: Integer;
1085	>	begin
1086	>	for i := 0 to FTransactions.Count - 1 do if FTransactions[i] <> nil then
1087	>	RemoveTransaction(i);
1088	>	end;
1089	>
1090	>	procedure TIBDataBase.SetDatabaseName( const Value: TIBFileName);
1091	>	begin
1092	>	if FDBName <> Value then
1093	>	begin
1094	>	EnsureInactive;
1095	>	CheckInactive;
1096	>	FDBName := Value;
1097	>	end;
1098	>	end;
1099	>
1100	>	procedure TIBDataBase.SetDBParamByDPB( const Idx: Integer; Value: String);
1101	>	var
1102	>	ConstIdx: Integer;
1103	>	begin
1104	>	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
1105	>	if (Value = '') then
1106	>	begin
1107	>	if ConstIdx <> -1 then
1108	>	Params.Delete(ConstIdx);
1109	>	end
1110	>	else
1111	>	begin
1112	>	if (ConstIdx = -1) then
1113	>	Params.Add(DPBConstantNames[Idx] + '=' + Value)
1114	>	else
1115	>	Params[ConstIdx] := DPBConstantNames[Idx] + '=' + Value;
1116	>	end;
1117	>	end;
1118	>
1119	>	procedure TIBDataBase.SetDBParams(Value: TStrings);
1120	>	begin
1121	>	FDBParams.Assign(Value);
1122	>	end;
1123	>
1124	>	procedure TIBDataBase.SetDefaultTransaction(Value: TIBTransaction);
1125	>	var
1126	>	i: Integer;
1127	>	begin
1128	>	if (FDefaultTransaction <> nil) and (FDefaultTransaction <> Value) then
1129	>	begin
1130	>	i := FindTransaction(FDefaultTransaction);
1131	>	if (i <> -1) and (FDefaultTransaction.DefaultDatabase <> self) then
1132	>	RemoveTransaction(i);
1133	>	end;
1134	>	if (Value <> nil) and (FDefaultTransaction <> Value) then
1135	>	begin
1136	>	Value.AddDatabase(Self);
1137	>	AddTransaction(Value);
1138	>	end;
1139	>	FDefaultTransaction := Value;
1140	>	end;
1141	>
1142	>	procedure TIBDataBase.SetHandle(Value: TISC_DB_HANDLE);
1143	>	begin
1144	>	if HandleIsShared then
1145	>	Close
1146	>	else
1147	>	CheckInactive;
1148	>	FHandle := Value;
1149	>	FHandleIsShared := (Value <> nil);
1150	>	end;
1151	>
1152	>	procedure TIBDataBase.SetIdleTimer(Value: Integer);
1153	>	begin
1154	>	if Value < 0 then
1155	>	IBError(ibxeTimeoutNegative, [nil])
1156	>	else
1157	>	if (Value = 0) then
1158	>	begin
1159	>	FTimer.Enabled := False;
1160	>	FTimer.Interval := 0;
1161	>	end
1162	>	else
1163	>	if (Value > 0) then
1164	>	begin
1165	>	FTimer.Interval := Value;
1166	>	if not (csDesigning in ComponentState) then
1167	>	FTimer.Enabled := True;
1168	>	end;
1169	>	end;
1170	>
1171	>	function TIBDataBase.TestConnected: Boolean;
1172	>	var
1173	>	DatabaseInfo: TIBDatabaseInfo;
1174	>	begin
1175	>	result := Connected;
1176	>	if result then
1177	>	begin
1178	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1179	>	try
1180	>	DatabaseInfo.Database := self;
1181	>	{ poke the server to see if connected }
1182	>	if DatabaseInfo.BaseLevel = 0 then ;
1183	>	DatabaseInfo.Free;
1184	>	except
1185	>	ForceClose;
1186	>	result := False;
1187	>	DatabaseInfo.Free;
1188	>	end;
1189	>	end;
1190	>	end;
1191	>
1192	>	procedure TIBDataBase.TimeoutConnection(Sender: TObject);
1193	>	begin
1194	>	if Connected then
1195	>	begin
1196	>	if FCanTimeout then
1197	>	begin
1198	>	ForceClose;
1199	>	if Assigned(FOnIdleTimer) then
1200	>	FOnIdleTimer(Self);
1201	>	end
1202	>	else
1203	>	FCanTimeout := True;
1204	>	end;
1205	>	end;
1206	>
1207	>	function TIBDataBase.GetIsReadOnly: Boolean;
1208	>	var
1209	>	DatabaseInfo: TIBDatabaseInfo;
1210	>	begin
1211	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1212	>	DatabaseInfo.Database := self;
1213	>	if (DatabaseInfo.ODSMajorVersion < 10) then
1214	>	result := false
1215	>	else
1216	>	begin
1217	>	if (DatabaseInfo.ReadOnly = 0) then
1218	>	result := false
1219	>	else
1220	>	result := true;
1221	>	end;
1222	>	DatabaseInfo.Free;
1223	>	end;
1224	>
1225	>	function TIBDataBase.GetSQLDialect: Integer;
1226	>	begin
1227	>	Result := FSQLDialect;
1228	>	end;
1229	>
1230	>
1231	>	procedure TIBDataBase.SetSQLDialect( const Value: Integer);
1232	>	begin
1233	>	if (Value < 1) then IBError(ibxeSQLDialectInvalid, [nil]);
1234	>	if ((FHandle = nil) or (Value <= FDBSQLDialect))  then
1235	>	FSQLDialect := Value
1236	>	else
1237	>	IBError(ibxeSQLDialectInvalid, [nil]);
1238	>	end;
1239	>
1240	>	function TIBDataBase.GetDBSQLDialect: Integer;
1241	>	var
1242	>	DatabaseInfo: TIBDatabaseInfo;
1243	>	begin
1244	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1245	>	DatabaseInfo.Database := self;
1246	>	result := DatabaseInfo.DBSQLDialect;
1247	>	DatabaseInfo.Free;
1248	>	end;
1249	>
1250	>	procedure TIBDataBase.ValidateClientSQLDialect;
1251	>	begin
1252	>	if (FDBSQLDialect < FSQLDialect) then
1253	>	begin
1254	>	FSQLDialect := FDBSQLDialect;
1255	>	if Assigned (FOnDialectDowngradeWarning) then
1256	>	FOnDialectDowngradeWarning(self);
1257	>	end;
1258	>	end;
1259	>
1260	>	procedure TIBDataBase.ApplyUpdates( const DataSets: array of TDataSet);
1261	>	var
1262	>	I: Integer;
1263	>	DS: TIBCustomDataSet;
1264	>	TR: TIBTransaction;
1265	>	begin
1266	>	TR := nil;
1267	>	for I := 0 to High(DataSets) do
1268	>	begin
1269	>	DS := TIBCustomDataSet(DataSets[I]);
1270	>	if DS.Database <> Self then
1271	>	IBError(ibxeUpdateWrongDB, [nil]);
1272	>	if TR = nil then
1273	>	TR := DS.Transaction;
1274	>	if (DS.Transaction <> TR) or (TR = nil) then
1275	>	IBError(ibxeUpdateWrongTR, [nil]);
1276	>	end;
1277	>	TR.CheckInTransaction;
1278	>	for I := 0 to High(DataSets) do
1279	>	begin
1280	>	DS := TIBCustomDataSet(DataSets[I]);
1281	>	DS.ApplyUpdates;
1282	>	end;
1283	>	TR.CommitRetaining;
1284	>	end;
1285	>
1286	>	procedure TIBDataBase.CloseDataSets;
1287	>	var
1288	>	i: Integer;
1289	>	begin
1290	>	for i := 0 to DataSetCount - 1 do
1291	>	if (DataSets[i] <> nil) then
1292	>	DataSets[i].close;
1293	>	end;
1294	>
1295	>	function TIBDataBase.GetDataset(Index: longint): TDataset;
1296	>	begin
1297	>	if (Index >= 0) and (Index < FDataSets.Count) then
1298	>	Result := TDataSet(FDataSets[Index])
1299	>	else
1300	>	raise Exception.Create('Invalid Index to DataSets');
1301	>	end;
1302	>
1303	>	function TIBDataBase.GetDataSetCount: Longint;
1304	>	begin
1305	>	Result := FDataSets.Count;
1306	>	end;
1307	>
1308	>	procedure TIBDataBase.ReadState(Reader: TReader);
1309	>	begin
1310	>	FDBParams.Clear;
1311	>	inherited ReadState(Reader);
1312	>	end;
1313	>
1314	>	procedure TIBDataBase.SetConnected(Value: boolean);
1315	>	begin
1316	>	if StreamedConnected and not AllowStreamedConnected then
1317	>	begin
1318	>	StreamedConnected := false;
1319	>	Value := false
1320	>	end;
1321	>	inherited SetConnected(Value);
1322	>	end;
1323	>
1324	>	procedure TIBDataBase.GetFieldNames( const TableName: string; List: TStrings);
1325	>	var
1326	>	Query: TIBSQL;
1327	>	begin
1328	>	if TableName = '' then
1329	>	IBError(ibxeNoTableName, [nil]);
1330	>	if not Connected then
1331	>	Open;
1332	>	if not FInternalTransaction.Active then
1333	>	FInternalTransaction.StartTransaction;
1334	>	Query := TIBSQL.Create(self);
1335	>	try
1336	>	Query.GoToFirstRecordOnExecute := False;
1337	>	Query.Database := Self;
1338	>	Query.Transaction := FInternalTransaction;
1339	>	Query.SQL.Text := 'Select R.RDB$FIELD_NAME ' + {do not localize}
1340	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
1341	>	'where R.RDB$RELATION_NAME = ' + {do not localize}
1342	>	'''' +
1343	>	FormatIdentifierValue(SQLDialect, TableName) +
1344	>	''' ' +
1345	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '; {do not localize}
1346	>	Query.Prepare;
1347	>	Query.ExecQuery;
1348	>	with List do
1349	>	begin
1350	>	BeginUpdate;
1351	>	try
1352	>	Clear;
1353	>	while (not Query.EOF) and (Query.Next <> nil) do
1354	>	List.Add(TrimRight(Query.Current.ByName('RDB$FIELD_NAME').AsString)); {do not localize}
1355	>	finally
1356	>	EndUpdate;
1357	>	end;
1358	>	end;
1359	>	finally
1360	>	Query.free;
1361	>	FInternalTransaction.Commit;
1362	>	end;
1363	>	end;
1364	>
1365	>	procedure TIBDataBase.GetTableNames(List: TStrings; SystemTables: Boolean);
1366	>	var
1367	>	Query : TIBSQL;
1368	>	begin
1369	>	if not (csReading in ComponentState) then
1370	>	begin
1371	>	if not Connected then
1372	>	Open;
1373	>	if not FInternalTransaction.Active then
1374	>	FInternalTransaction.StartTransaction;
1375	>	Query := TIBSQL.Create(self);
1376	>	try
1377	>	Query.GoToFirstRecordOnExecute := False;
1378	>	Query.Database := Self;
1379	>	Query.Transaction := FInternalTransaction;
1380	>	if SystemTables then
1381	>	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1382	>	' where RDB$VIEW_BLR is NULL' {do not localize}
1383	>	else
1384	>	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1385	>	' where RDB$VIEW_BLR is NULL and RDB$SYSTEM_FLAG = 0'; {do not localize}
1386	>	Query.Prepare;
1387	>	Query.ExecQuery;
1388	>	with List do
1389	>	begin
1390	>	BeginUpdate;
1391	>	try
1392	>	Clear;
1393	>	while (not Query.EOF) and (Query.Next <> nil) do
1394	>	List.Add(TrimRight(Query.Current[0].AsString));
1395	>	finally
1396	>	EndUpdate;
1397	>	end;
1398	>	end;
1399	>	finally
1400	>	Query.Free;
1401	>	FInternalTransaction.Commit;
1402	>	end;
1403	>	end;
1404	>	end;
1405	>
1406	>	{ TIBTransaction }
1407	>
1408	>	constructor TIBTransaction.Create(AOwner: TComponent);
1409	>	begin
1410	>	inherited Create(AOwner);
1411	>	FIBLoaded := False;
1412	>	CheckIBLoaded;
1413	>	FIBLoaded := True;
1414	>	CheckIBLoaded;
1415	>	FDatabases := TList.Create;
1416	>	FSQLObjects := TList.Create;
1417	>	FHandle := nil;
1418	>	FTPB := nil;
1419	>	FTPBLength := 0;
1420	>	FTRParams := TStringList.Create;
1421	>	FTRParamsChanged := True;
1422	>	TStringList(FTRParams).OnChange := TRParamsChange;
1423	>	TStringList(FTRParams).OnChanging := TRParamsChanging;
1424	>	FTimer := TTimer.Create(Self);
1425	>	FTimer.Enabled := False;
1426	>	FTimer.Interval := 0;
1427	>	FTimer.OnTimer := TimeoutTransaction;
1428	>	FDefaultAction := taCommit;
1429	>	end;
1430	>
1431	>	destructor TIBTransaction.Destroy;
1432	>	var
1433	>	i: Integer;
1434	>	begin
1435	>	if FIBLoaded then
1436	>	begin
1437	>	if InTransaction then
1438	>	EndTransaction(FDefaultAction, True);
1439	>	for i := 0 to FSQLObjects.Count - 1 do
1440	>	if FSQLObjects[i] <> nil then
1441	>	SQLObjects[i].DoTransactionFree;
1442	>	RemoveSQLObjects;
1443	>	RemoveDatabases;
1444	>	FreeMem(FTPB);
1445	>	FTPB := nil;
1446	>	FTRParams.Free;
1447	>	FSQLObjects.Free;
1448	>	FDatabases.Free;
1449	>	end;
1450	>	inherited Destroy;
1451	>	end;
1452	>
1453	>	function TIBTransaction.Call(ErrCode: ISC_STATUS;
1454	>	RaiseError: Boolean): ISC_STATUS;
1455	>	var
1456	>	i: Integer;
1457	>	begin
1458	>	result := ErrCode;
1459	>	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1460	>	Databases[i].FCanTimeout := False;
1461	>	FCanTimeout := False;
1462	>	if RaiseError and (result > 0) then
1463	>	IBDataBaseError;
1464	>	end;
1465	>
1466	>	procedure TIBTransaction.CheckDatabasesInList;
1467	>	begin
1468	>	if GetDatabaseCount = 0 then
1469	>	IBError(ibxeNoDatabasesInTransaction, [nil]);
1470	>	end;
1471	>
1472	>	procedure TIBTransaction.CheckInTransaction;
1473	>	begin
1474	>	if FStreamedActive and (not InTransaction) then
1475	>	Loaded;
1476	>	if (FHandle = nil) then
1477	>	IBError(ibxeNotInTransaction, [nil]);
1478	>	end;
1479	>
1480	>	procedure TIBTransaction.DoBeforeTransactionEnd;
1481	>	begin
1482	>	if Assigned(FBeforeTransactionEnd) then
1483	>	FBeforeTransactionEnd(self);
1484	>	end;
1485	>
1486	>	procedure TIBTransaction.DoAfterTransactionEnd;
1487	>	begin
1488	>	if Assigned(FAfterTransactionEnd) then
1489	>	FAfterTransactionEnd(self);
1490	>	end;
1491	>
1492	>	procedure TIBTransaction.DoOnStartTransaction;
1493	>	begin
1494	>	if assigned(FOnStartTransaction) then
1495	>	OnStartTransaction(self);
1496	>	end;
1497	>
1498	>	procedure TIBTransaction.DoAfterExecQuery(Sender: TObject);
1499	>	begin
1500	>	if assigned(FAfterExecQuery) then
1501	>	AfterExecQuery(Sender);
1502	>	end;
1503	>
1504	>	procedure TIBTransaction.DoAfterEdit(Sender: TObject);
1505	>	begin
1506	>	if assigned(FAfterEdit) then
1507	>	AfterEdit(Sender);
1508	>	end;
1509	>
1510	>	procedure TIBTransaction.DoAfterDelete(Sender: TObject);
1511	>	begin
1512	>	if assigned(FAfterDelete) then
1513	>	AfterDelete(Sender);
1514	>	end;
1515	>
1516	>	procedure TIBTransaction.DoAfterInsert(Sender: TObject);
1517	>	begin
1518	>	if assigned(FAfterInsert) then
1519	>	AfterInsert(Sender);
1520	>	end;
1521	>
1522	>	procedure TIBTransaction.DoAfterPost(Sender: TObject);
1523	>	begin
1524	>	if assigned(FAfterPost) then
1525	>	AfterPost(Sender);
1526	>	end;
1527	>
1528	>	procedure TIBTransaction.EnsureNotInTransaction;
1529	>	begin
1530	>	if csDesigning in ComponentState then
1531	>	begin
1532	>	if FHandle <> nil then
1533	>	Rollback;
1534	>	end;
1535	>	end;
1536	>
1537	>	procedure TIBTransaction.CheckNotInTransaction;
1538	>	begin
1539	>	if (FHandle <> nil) then
1540	>	IBError(ibxeInTransaction, [nil]);
1541	>	end;
1542	>
1543	>	function TIBTransaction.AddDatabase(db: TIBDatabase): Integer;
1544	>	var
1545	>	i: Integer;
1546	>	NilFound: Boolean;
1547	>	begin
1548	>	i := FindDatabase(db);
1549	>	if i <> -1 then
1550	>	begin
1551	>	result := i;
1552	>	exit;
1553	>	end;
1554	>	NilFound := False;
1555	>	i := 0;
1556	>	while (not NilFound) and (i < FDatabases.Count) do
1557	>	begin
1558	>	NilFound := (FDatabases[i] = nil);
1559	>	if (not NilFound) then
1560	>	Inc(i);
1561	>	end;
1562	>	if (NilFound) then
1563	>	begin
1564	>	FDatabases[i] := db;
1565	>	result := i;
1566	>	end
1567	>	else
1568	>	begin
1569	>	result := FDatabases.Count;
1570	>	FDatabases.Add(db);
1571	>	end;
1572	>	end;
1573	>
1574	>	function TIBTransaction.AddSQLObject(ds: TIBBase): Integer;
1575	>	begin
1576	>	result := 0;
1577	>	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
1578	>	Inc(result);
1579	>	if (result = FSQLObjects.Count) then
1580	>	FSQLObjects.Add(ds)
1581	>	else
1582	>	FSQLObjects[result] := ds;
1583	>	end;
1584	>
1585	>	procedure TIBTransaction.Commit;
1586	>	begin
1587	>	EndTransaction(TACommit, False);
1588	>	end;
1589	>
1590	>	procedure TIBTransaction.CommitRetaining;
1591	>	begin
1592	>	EndTransaction(TACommitRetaining, False);
1593	>	end;
1594	>
1595	>	procedure TIBTransaction.EndTransaction(Action: TTransactionAction;
1596	>	Force: Boolean);
1597	>	var
1598	>	status: ISC_STATUS;
1599	>	i: Integer;
1600	>	begin
1601	>	CheckInTransaction;
1602	>	if FInEndTransaction then Exit;
1603	>	FInEndTransaction := true;
1604	>	FEndAction := Action;
1605	>	try
1606	>	case Action of
1607	>	TARollback, TACommit:
1608	>	begin
1609	>	if (HandleIsShared) and
1610	>	(Action <> FDefaultAction) and
1611	>	(not Force) then
1612	>	IBError(ibxeCantEndSharedTransaction, [nil]);
1613	>	DoBeforeTransactionEnd;
1614	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1615	>	SQLObjects[i].DoBeforeTransactionEnd(Action);
1616	>	if InTransaction then
1617	>	begin
1618	>	if HandleIsShared then
1619	>	begin
1620	>	FHandle := nil;
1621	>	FHandleIsShared := False;
1622	>	status := 0;
1623	>	end
1624	>	else
1625	>	if (Action = TARollback) then
1626	>	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False)
1627	>	else
1628	>	status := Call(isc_commit_transaction(StatusVector, @FHandle), False);
1629	>	if ((Force) and (status > 0)) then
1630	>	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False);
1631	>	if Force then
1632	>	FHandle := nil
1633	>	else
1634	>	if (status > 0) then
1635	>	IBDataBaseError;
1636	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1637	>	SQLObjects[i].DoAfterTransactionEnd;
1638	>	DoAfterTransactionEnd;
1639	>	end;
1640	>	end;
1641	>	TACommitRetaining:
1642	>	Call(isc_commit_retaining(StatusVector, @FHandle), True);
1643	>	TARollbackRetaining:
1644	>	Call(isc_rollback_retaining(StatusVector, @FHandle), True);
1645	>	end;
1646	>	if not (csDesigning in ComponentState) then
1647	>	begin
1648	>	case Action of
1649	>	TACommit:
1650	>	MonitorHook.TRCommit(Self);
1651	>	TARollback:
1652	>	MonitorHook.TRRollback(Self);
1653	>	TACommitRetaining:
1654	>	MonitorHook.TRCommitRetaining(Self);
1655	>	TARollbackRetaining:
1656	>	MonitorHook.TRRollbackRetaining(Self);
1657	>	end;
1658	>	end;
1659	>	finally
1660	>	FInEndTransaction := false
1661	>	end;
1662	>	end;
1663	>
1664	>	function TIBTransaction.GetDatabase(Index: Integer): TIBDatabase;
1665	>	begin
1666	>	result := FDatabases[Index];
1667	>	end;
1668	>
1669	>	function TIBTransaction.GetDatabaseCount: Integer;
1670	>	var
1671	>	i, Cnt: Integer;
1672	>	begin
1673	>	result := 0;
1674	>	Cnt := FDatabases.Count - 1;
1675	>	for i := 0 to Cnt do if FDatabases[i] <> nil then
1676	>	Inc(result);
1677	>	end;
1678	>
1679	>	function TIBTransaction.GetSQLObject(Index: Integer): TIBBase;
1680	>	begin
1681	>	result := FSQLObjects[Index];
1682	>	end;
1683	>
1684	>	function TIBTransaction.GetSQLObjectCount: Integer;
1685	>	var
1686	>	i, Cnt: Integer;
1687	>	begin
1688	>	result := 0;
1689	>	Cnt := FSQLObjects.Count - 1;
1690	>	for i := 0 to Cnt do if FSQLObjects[i] <> nil then
1691	>	Inc(result);
1692	>	end;
1693	>
1694	>	function TIBTransaction.GetInTransaction: Boolean;
1695	>	begin
1696	>	result := (FHandle <> nil);
1697	>	end;
1698	>
1699	>	function TIBTransaction.FindDatabase(db: TIBDatabase): Integer;
1700	>	var
1701	>	i: Integer;
1702	>	begin
1703	>	result := -1;
1704	>	for i := 0 to FDatabases.Count - 1 do
1705	>	if db = TIBDatabase(FDatabases[i]) then
1706	>	begin
1707	>	result := i;
1708	>	break;
1709	>	end;
1710	>	end;
1711	>
1712	>	function TIBTransaction.FindDefaultDatabase: TIBDatabase;
1713	>	var
1714	>	i: Integer;
1715	>	begin
1716	>	result := FDefaultDatabase;
1717	>	if result = nil then
1718	>	begin
1719	>	for i := 0 to FDatabases.Count - 1 do
1720	>	if (TIBDatabase(FDatabases[i]) <> nil) and
1721	>	(TIBDatabase(FDatabases[i]).DefaultTransaction = self) then
1722	>	begin
1723	>	result := TIBDatabase(FDatabases[i]);
1724	>	break;
1725	>	end;
1726	>	end;
1727	>	end;
1728	>
1729	>	function TIBTransaction.GetEndAction: TTransactionAction;
1730	>	begin
1731	>	if FInEndTransaction then
1732	>	Result := FEndAction
1733	>	else
1734	>	IBError(ibxeIB60feature, [nil])
1735	>	end;
1736	>
1737	>
1738	>	function TIBTransaction.GetIdleTimer: Integer;
1739	>	begin
1740	>	result := FTimer.Interval;
1741	>	end;
1742	>
1743	>	procedure TIBTransaction.Loaded;
1744	>	begin
1745	>	inherited Loaded;
1746	>	end;
1747	>
1748	>	procedure TIBTransaction.BeforeDatabaseDisconnect(DB: TIBDatabase);
1749	>	begin
1750	>	if InTransaction then
1751	>	EndTransaction(FDefaultAction, True);
1752	>	end;
1753	>
1754	>	procedure TIBTransaction.RemoveDatabase(Idx: Integer);
1755	>	var
1756	>	DB: TIBDatabase;
1757	>	begin
1758	>	if ((Idx >= 0) and (FDatabases[Idx] <> nil)) then
1759	>	begin
1760	>	DB := Databases[Idx];
1761	>	FDatabases[Idx] := nil;
1762	>	DB.RemoveTransaction(DB.FindTransaction(Self));
1763	>	if DB = FDefaultDatabase then
1764	>	FDefaultDatabase := nil;
1765	>	end;
1766	>	end;
1767	>
1768	>	procedure TIBTransaction.RemoveDatabases;
1769	>	var
1770	>	i: Integer;
1771	>	begin
1772	>	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1773	>	RemoveDatabase(i);
1774	>	end;
1775	>
1776	>	procedure TIBTransaction.RemoveSQLObject(Idx: Integer);
1777	>	var
1778	>	ds: TIBBase;
1779	>	begin
1780	>	if ((Idx >= 0) and (FSQLObjects[Idx] <> nil)) then
1781	>	begin
1782	>	ds := SQLObjects[Idx];
1783	>	FSQLObjects[Idx] := nil;
1784	>	ds.Transaction := nil;
1785	>	end;
1786	>	end;
1787	>
1788	>	procedure TIBTransaction.RemoveSQLObjects;
1789	>	var
1790	>	i: Integer;
1791	>	begin
1792	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1793	>	RemoveSQLObject(i);
1794	>	end;
1795	>
1796	>	procedure TIBTransaction.Rollback;
1797	>	begin
1798	>	EndTransaction(TARollback, False);
1799	>	end;
1800	>
1801	>	procedure TIBTransaction.RollbackRetaining;
1802	>	begin
1803	>	EndTransaction(TARollbackRetaining, False);
1804	>	end;
1805	>
1806	>	procedure TIBTransaction.SetActive(Value: Boolean);
1807	>	begin
1808	>	if csReading in ComponentState then
1809	>	FStreamedActive := Value
1810	>	else
1811	>	if Value and not InTransaction then
1812	>	StartTransaction
1813	>	else
1814	>	if not Value and InTransaction then
1815	>	Rollback;
1816	>	end;
1817	>
1818	>	procedure TIBTransaction.SetDefaultAction(Value: TTransactionAction);
1819	>	begin
1820	>	(*  if (Value = taRollbackRetaining) and (GetIBClientVersion < 6) then
1821	>	IBError(ibxeIB60feature, [nil]);*)
1822	>	FDefaultAction := Value;
1823	>	end;
1824	>
1825	>	procedure TIBTransaction.SetDefaultDatabase(Value: TIBDatabase);
1826	>	var
1827	>	i: integer;
1828	>	begin
1829	>	if (FDefaultDatabase <> nil) and (FDefaultDatabase <> Value) then
1830	>	begin
1831	>	i := FDefaultDatabase.FindTransaction(self);
1832	>	if (i <> -1) then
1833	>	FDefaultDatabase.RemoveTransaction(i);
1834	>	end;
1835	>	if (Value <> nil) and (FDefaultDatabase <> Value) then
1836	>	begin
1837	>	Value.AddTransaction(Self);
1838	>	AddDatabase(Value);
1839	>	for i := 0 to FSQLObjects.Count - 1 do
1840	>	if (FSQLObjects[i] <> nil) and
1841	>	(TIBBase(FSQLObjects[i]).Database = nil) then
1842	>	SetObjectProp(TIBBase(FSQLObjects[i]).Owner, 'Database', Value);
1843	>	end;
1844	>	FDefaultDatabase := Value;
1845	>	end;
1846	>
1847	>	procedure TIBTransaction.SetHandle(Value: TISC_TR_HANDLE);
1848	>	begin
1849	>	if (HandleIsShared) then
1850	>	EndTransaction(DefaultAction, True)
1851	>	else
1852	>	CheckNotInTransaction;
1853	>	FHandle := Value;
1854	>	FHandleIsShared := (Value <> nil);
1855	>	end;
1856	>
1857	>	procedure TIBTransaction.Notification( AComponent: TComponent;
1858	>	Operation: TOperation);
1859	>	var
1860	>	i: Integer;
1861	>	begin
1862	>	inherited Notification( AComponent, Operation);
1863	>	if (Operation = opRemove) and (AComponent = FDefaultDatabase) then
1864	>	begin
1865	>	i := FindDatabase(FDefaultDatabase);
1866	>	if (i <> -1) then
1867	>	RemoveDatabase(i);
1868	>	FDefaultDatabase := nil;
1869	>	end;
1870	>	end;
1871	>
1872	>	procedure TIBTransaction.SetIdleTimer(Value: Integer);
1873	>	begin
1874	>	if Value < 0 then
1875	>	IBError(ibxeTimeoutNegative, [nil])
1876	>	else
1877	>	if (Value = 0) then
1878	>	begin
1879	>	FTimer.Enabled := False;
1880	>	FTimer.Interval := 0;
1881	>	end
1882	>	else
1883	>	if (Value > 0) then
1884	>	begin
1885	>	FTimer.Interval := Value;
1886	>	if not (csDesigning in ComponentState) then
1887	>	FTimer.Enabled := True;
1888	>	end;
1889	>	end;
1890	>
1891	>	procedure TIBTransaction.SetTRParams(Value: TStrings);
1892	>	begin
1893	>	FTRParams.Assign(Value);
1894	>	end;
1895	>
1896	>	procedure TIBTransaction.StartTransaction;
1897	>	var
1898	>	pteb: PISC_TEB_ARRAY;
1899	>	TPB: String;
1900	>	i: Integer;
1901	>	begin
1902	>	CheckNotInTransaction;
1903	>	CheckDatabasesInList;
1904	>	for i := 0 to FDatabases.Count - 1 do
1905	>	if  FDatabases[i] <> nil then
1906	>	begin
1907	>	with TIBDatabase(FDatabases[i]) do
1908	>	if not Connected then
1909	>	if FStreamedConnected then
1910	>	begin
1911	>	Open;
1912	>	FStreamedConnected := False;
1913	>	end
1914	>	else
1915	>	IBError(ibxeDatabaseClosed, [nil]);
1916	>	end;
1917	>	if FTRParamsChanged then
1918	>	begin
1919	>	FTRParamsChanged := False;
1920	>	GenerateTPB(FTRParams, TPB, FTPBLength);
1921	>	if FTPBLength > 0 then
1922	>	begin
1923	>	IBAlloc(FTPB, 0, FTPBLength);
1924	>	Move(TPB[1], FTPB[0], FTPBLength);
1925	>	end;
1926	>	end;
1927	>
1928	>	pteb := nil;
1929	>	IBAlloc(pteb, 0, DatabaseCount * SizeOf(TISC_TEB));
1930	>	try
1931	>	for i := 0 to DatabaseCount - 1 do if Databases[i] <> nil then
1932	>	begin
1933	>	pteb^[i].db_handle := @(Databases[i].Handle);
1934	>	pteb^[i].tpb_length := FTPBLength;
1935	>	pteb^[i].tpb_address := FTPB;
1936	>	end;
1937	>	if Call(isc_start_multiple(StatusVector, @FHandle,
1938	>	DatabaseCount, PISC_TEB(pteb)), False) > 0 then
1939	>	begin
1940	>	FHandle := nil;
1941	>	IBDataBaseError;
1942	>	end;
1943	>	if not (csDesigning in ComponentState) then
1944	>	MonitorHook.TRStart(Self);
1945	>	finally
1946	>	FreeMem(pteb);
1947	>	end;
1948	>	DoOnStartTransaction;
1949	>	end;
1950	>
1951	>	procedure TIBTransaction.TimeoutTransaction(Sender: TObject);
1952	>	begin
1953	>	if InTransaction then
1954	>	begin
1955	>	if FCanTimeout then
1956	>	begin
1957	>	EndTransaction(FDefaultAction, True);
1958	>	if Assigned(FOnIdleTimer) then
1959	>	FOnIdleTimer(Self);
1960	>	end
1961	>	else
1962	>	FCanTimeout := True;
1963	>	end;
1964	>	end;
1965	>
1966	>	procedure TIBTransaction.TRParamsChange(Sender: TObject);
1967	>	begin
1968	>	FTRParamsChanged := True;
1969	>	end;
1970	>
1971	>	procedure TIBTransaction.TRParamsChanging(Sender: TObject);
1972	>	begin
1973	>	EnsureNotInTransaction;
1974	>	CheckNotInTransaction;
1975	>	end;
1976	>
1977	>	{ TIBBase }
1978	>	constructor TIBBase.Create(AOwner: TObject);
1979	>	begin
1980	>	FOwner := AOwner;
1981	>	end;
1982	>
1983	>	destructor TIBBase.Destroy;
1984	>	begin
1985	>	SetDatabase(nil);
1986	>	SetTransaction(nil);
1987	>	inherited Destroy;
1988	>	end;
1989	>
1990	>	function TIBBase.GetCharSetSize(CharSetID: integer): integer;
1991	>	begin
1992	>	if (CharSetID >= 0) and (CharSetID < Length(Database.FCharSetSizes)) then
1993	>	Result := Database.FCharSetSizes[CharSetID]
1994	>	else
1995	>	Result := 1; {Unknown character set}
1996	>	end;
1997	>
1998	>	procedure TIBBase.CheckDatabase;
1999	>	begin
2000	>	if (FDatabase = nil) then
2001	>	IBError(ibxeDatabaseNotAssigned, [nil]);
2002	>	FDatabase.CheckActive;
2003	>	end;
2004	>
2005	>	procedure TIBBase.CheckTransaction;
2006	>	begin
2007	>	if FTransaction = nil then
2008	>	IBError(ibxeTransactionNotAssigned, [nil]);
2009	>	FTransaction.CheckInTransaction;
2010	>	end;
2011	>
2012	>	function TIBBase.GetDBHandle: PISC_DB_HANDLE;
2013	>	begin
2014	>	CheckDatabase;
2015	>	result := @FDatabase.Handle;
2016	>	end;
2017	>
2018	>	function TIBBase.GetTRHandle: PISC_TR_HANDLE;
2019	>	begin
2020	>	CheckTransaction;
2021	>	result := @FTransaction.Handle;
2022	>	end;
2023	>
2024	>	procedure TIBBase.DoBeforeDatabaseConnect(DBParams: TStrings; var DBName: string
2025	>	);
2026	>	begin
2027	>	if assigned(FBeforeDatabaseConnect) then
2028	>	BeforeDatabaseConnect(self,DBParams,DBName);
2029	>	end;
2030	>
2031	>	procedure TIBBase.DoAfterDatabaseConnect;
2032	>	begin
2033	>	if assigned(FAfterDatabaseConnect) then
2034	>	AfterDatabaseConnect(self);
2035	>	end;
2036	>
2037	>	procedure TIBBase.DoBeforeDatabaseDisconnect;
2038	>	begin
2039	>	if Assigned(BeforeDatabaseDisconnect) then
2040	>	BeforeDatabaseDisconnect(Self);
2041	>	end;
2042	>
2043	>	procedure TIBBase.DoAfterDatabaseDisconnect;
2044	>	begin
2045	>	if Assigned(AfterDatabaseDisconnect) then
2046	>	AfterDatabaseDisconnect(Self);
2047	>	end;
2048	>
2049	>	procedure TIBBase.DoDatabaseFree;
2050	>	begin
2051	>	if Assigned(OnDatabaseFree) then
2052	>	OnDatabaseFree(Self);
2053	>	SetDatabase(nil);
2054	>	SetTransaction(nil);
2055	>	end;
2056	>
2057	>	procedure TIBBase.DoBeforeTransactionEnd(Action: TTransactionAction);
2058	>	begin
2059	>	if Assigned(BeforeTransactionEnd) then
2060	>	BeforeTransactionEnd(Self,Action);
2061	>	end;
2062	>
2063	>	procedure TIBBase.DoAfterTransactionEnd;
2064	>	begin
2065	>	if Assigned(AfterTransactionEnd) then
2066	>	AfterTransactionEnd(Self);
2067	>	end;
2068	>
2069	>	procedure TIBBase.DoTransactionFree;
2070	>	begin
2071	>	if Assigned(OnTransactionFree) then
2072	>	OnTransactionFree(Self);
2073	>	FTransaction := nil;
2074	>	end;
2075	>
2076	>	procedure TIBBase.DoAfterExecQuery(Sender: TObject);
2077	>	begin
2078	>	if FTransaction <> nil then
2079	>	FTransaction.DoAfterExecQuery(Sender);
2080	>	end;
2081	>
2082	>	procedure TIBBase.DoAfterEdit(Sender: TObject);
2083	>	begin
2084	>	if FTransaction <> nil then
2085	>	FTransaction.DoAfterEdit(Sender);
2086	>	end;
2087	>
2088	>	procedure TIBBase.DoAfterDelete(Sender: TObject);
2089	>	begin
2090	>	if FTransaction <> nil then
2091	>	FTransaction.DoAfterDelete(Sender);
2092	>	end;
2093	>
2094	>	procedure TIBBase.DoAfterInsert(Sender: TObject);
2095	>	begin
2096	>	if FTransaction <> nil then
2097	>	FTransaction.DoAfterInsert(Sender);
2098	>	end;
2099	>
2100	>	procedure TIBBase.DoAfterPost(Sender: TObject);
2101	>	begin
2102	>	if FTransaction <> nil then
2103	>	FTransaction.DoAfterPost(Sender);
2104	>	end;
2105	>
2106	>	procedure TIBBase.SetDatabase(Value: TIBDatabase);
2107	>	begin
2108	>	if (FDatabase <> nil) then
2109	>	FDatabase.RemoveSQLObject(FIndexInDatabase);
2110	>	FDatabase := Value;
2111	>	if (FDatabase <> nil) then
2112	>	begin
2113	>	FIndexInDatabase := FDatabase.AddSQLObject(Self);
2114	>	if (FTransaction = nil) then
2115	>	Transaction := FDatabase.FindDefaultTransaction;
2116	>	end;
2117	>	end;
2118	>
2119	>	procedure TIBBase.SetTransaction(Value: TIBTransaction);
2120	>	begin
2121	>	if (FTransaction <> nil) then
2122	>	FTransaction.RemoveSQLObject(FIndexInTransaction);
2123	>	FTransaction := Value;
2124	>	if (FTransaction <> nil) then
2125	>	begin
2126	>	FIndexInTransaction := FTransaction.AddSQLObject(Self);
2127	>	if (FDatabase = nil) then
2128	>	Database := FTransaction.FindDefaultDatabase;
2129	>	end;
2130	>	end;
2131	>
2132	>	{ GenerateDPB -
2133	>	Given a string containing a textual representation
2134	>	of the database parameters, generate a database
2135	>	parameter buffer, and return it and its length
2136	>	in DPB and DPBLength, respectively. }
2137	>
2138	>	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
2139	>	var
2140	>	i, j, pval: Integer;
2141	>	DPBVal: UShort;
2142	>	ParamName, ParamValue: string;
2143	>	begin
2144	>	{ The DPB is initially empty, with the exception that
2145	>	the DPB version must be the first byte of the string. }
2146	>	DPBLength := 1;
2147	>	DPB := Char(isc_dpb_version1);
2148	>
2149	>	{Iterate through the textual database parameters, constructing
2150	>	a DPB on-the-fly }
2151	>	for i := 0 to sl.Count - 1 do
2152	>	begin
2153	>	{ Get the parameter's name and value from the list,
2154	>	and make sure that the name is all lowercase with
2155	>	no leading 'isc_dpb_' prefix
2156	>	}
2157	>	if (Trim(sl.Names[i]) = '') then
2158	>	continue;
2159	>	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
2160	>	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
2161	>	if (Pos(DPBPrefix, ParamName) = 1) then {mbcs ok}
2162	>	Delete(ParamName, 1, Length(DPBPrefix));
2163	>	{ We want to translate the parameter name to some Integer
2164	>	value. We do this by scanning through a list of known
2165	>	database parameter names (DPBConstantNames, defined above) }
2166	>	DPBVal := 0;
2167	>	{ Find the parameter }
2168	>	for j := 1 to isc_dpb_last_dpb_constant do
2169	>	if (ParamName = DPBConstantNames[j]) then
2170	>	begin
2171	>	DPBVal := j;
2172	>	break;
2173	>	end;
2174	>	{  A database parameter either contains a string value (case 1)
2175	>	or an Integer value (case 2)
2176	>	or no value at all (case 3)
2177	>	or an error needs to be generated (case else)  }
2178	>	case DPBVal of
2179	>	isc_dpb_user_name, isc_dpb_password, isc_dpb_password_enc,
2180	>	isc_dpb_sys_user_name, isc_dpb_license, isc_dpb_encrypt_key,
2181	>	isc_dpb_lc_messages, isc_dpb_lc_ctype,
2182	>	isc_dpb_sql_role_name, isc_dpb_sql_dialect:
2183	>	begin
2184	>	if DPBVal = isc_dpb_sql_dialect then
2185	>	ParamValue[1] := Char(Ord(ParamValue[1]) - 48);
2186	>	DPB := DPB +
2187	>	Char(DPBVal) +
2188	>	Char(Length(ParamValue)) +
2189	>	ParamValue;
2190	>	Inc(DPBLength, 2 + Length(ParamValue));
2191	>	end;
2192	>	isc_dpb_num_buffers, isc_dpb_dbkey_scope, isc_dpb_force_write,
2193	>	isc_dpb_no_reserve, isc_dpb_damaged, isc_dpb_verify:
2194	>	begin
2195	>	DPB := DPB +
2196	>	Char(DPBVal) +
2197	>	#1 +
2198	>	Char(StrToInt(ParamValue));
2199	>	Inc(DPBLength, 3);
2200	>	end;
2201	>	isc_dpb_sweep:
2202	>	begin
2203	>	DPB := DPB +
2204	>	Char(DPBVal) +
2205	>	#1 +
2206	>	Char(isc_dpb_records);
2207	>	Inc(DPBLength, 3);
2208	>	end;
2209	>	isc_dpb_sweep_interval:
2210	>	begin
2211	>	pval := StrToInt(ParamValue);
2212	>	DPB := DPB +
2213	>	Char(DPBVal) +
2214	>	#4 +
2215	>	PChar(@pval)[0] +
2216	>	PChar(@pval)[1] +
2217	>	PChar(@pval)[2] +
2218	>	PChar(@pval)[3];
2219	>	Inc(DPBLength, 6);
2220	>	end;
2221	>	isc_dpb_activate_shadow, isc_dpb_delete_shadow, isc_dpb_begin_log,
2222	>	isc_dpb_quit_log:
2223	>	begin
2224	>	DPB := DPB +
2225	>	Char(DPBVal) +
2226	>	#1 + #0;
2227	>	Inc(DPBLength, 3);
2228	>	end;
2229	>	else
2230	>	begin
2231	>	if (DPBVal > 0) and
2232	>	(DPBVal <= isc_dpb_last_dpb_constant) then
2233	>	IBError(ibxeDPBConstantNotSupported, [DPBConstantNames[DPBVal]])
2234	>	else
2235	>	IBError(ibxeDPBConstantUnknownEx, [sl.Names[i]]);
2236	>	end;
2237	>	end;
2238	>	end;
2239	>	end;
2240	>
2241	>	{ GenerateTPB -
2242	>	Given a string containing a textual representation
2243	>	of the transaction parameters, generate a transaction
2244	>	parameter buffer, and return it and its length in
2245	>	TPB and TPBLength, respectively. }
2246	>	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
2247	>	var
2248	>	i, j, TPBVal, ParamLength: Integer;
2249	>	ParamName, ParamValue: string;
2250	>	begin
2251	>	TPB := '';
2252	>	if (sl.Count = 0) then
2253	>	TPBLength := 0
2254	>	else
2255	>	begin
2256	>	TPBLength := sl.Count + 1;
2257	>	TPB := TPB + Char(isc_tpb_version3);
2258	>	end;
2259	>	for i := 0 to sl.Count - 1 do
2260	>	begin
2261	>	if (Trim(sl[i]) =  '') then
2262	>	begin
2263	>	Dec(TPBLength);
2264	>	Continue;
2265	>	end;
2266	>	if (Pos('=', sl[i]) = 0) then {mbcs ok}
2267	>	ParamName := LowerCase(sl[i]) {mbcs ok}
2268	>	else
2269	>	begin
2270	>	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
2271	>	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
2272	>	end;
2273	>	if (Pos(TPBPrefix, ParamName) = 1) then {mbcs ok}
2274	>	Delete(ParamName, 1, Length(TPBPrefix));
2275	>	TPBVal := 0;
2276	>	{ Find the parameter }
2277	>	for j := 1 to isc_tpb_last_tpb_constant do
2278	>	if (ParamName = TPBConstantNames[j]) then
2279	>	begin
2280	>	TPBVal := j;
2281	>	break;
2282	>	end;
2283	>	{ Now act on it }
2284	>	case TPBVal of
2285	>	isc_tpb_consistency, isc_tpb_exclusive, isc_tpb_protected,
2286	>	isc_tpb_concurrency, isc_tpb_shared, isc_tpb_wait, isc_tpb_nowait,
2287	>	isc_tpb_read, isc_tpb_write, isc_tpb_ignore_limbo,
2288	>	isc_tpb_read_committed, isc_tpb_rec_version, isc_tpb_no_rec_version:
2289	>	TPB := TPB + Char(TPBVal);
2290	>	isc_tpb_lock_read, isc_tpb_lock_write:
2291	>	begin
2292	>	TPB := TPB + Char(TPBVal);
2293	>	{ Now set the string parameter }
2294	>	ParamLength := Length(ParamValue);
2295	>	Inc(TPBLength, ParamLength + 1);
2296	>	TPB := TPB + Char(ParamLength) + ParamValue;
2297	>	end;
2298	>	else
2299	>	begin
2300	>	if (TPBVal > 0) and
2301	>	(TPBVal <= isc_tpb_last_tpb_constant) then
2302	>	IBError(ibxeTPBConstantNotSupported, [TPBConstantNames[TPBVal]])
2303	>	else
2304	>	IBError(ibxeTPBConstantUnknownEx, [sl.Names[i]]);
2305	>	end;
2306	>	end;
2307	>	end;
2308	>	end;
2309	>
2310	>	end.
2311	>
2312	>
2313	>
2314	>
2315	>

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