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Comparing ibx/trunk/runtime/IBDatabase.pas (file contents):
Revision 16 by tony, Thu Nov 22 22:53:40 2012 UTC vs.
Revision 17 by tony, Sat Dec 28 19:22:24 2013 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 ReadState(Reader: TReader); override;
219	<	procedure SetConnected (Value : boolean); override;
220	<	public
221	<	constructor Create(AOwner: TComponent); override;
222	<	destructor Destroy; override;
223	<	procedure ApplyUpdates(const DataSets: array of TDataSet);
224	<	procedure CloseDataSets;
225	<	procedure CheckActive;
226	<	procedure CheckInactive;
227	<	procedure CreateDatabase;
228	<	procedure DropDatabase;
229	<	procedure ForceClose;
230	<	procedure GetFieldNames(const TableName: string; List: TStrings);
231	<	procedure GetTableNames(List: TStrings; SystemTables: Boolean = False);
232	<	function IndexOfDBConst(st: String): Integer;
233	<	function TestConnected: Boolean;
234	<	procedure CheckDatabaseName;
235	<	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
236	<	function AddTransaction(TR: TIBTransaction): Integer;
237	<	function FindTransaction(TR: TIBTransaction): Integer;
238	<	function FindDefaultTransaction(): TIBTransaction;
239	<	procedure RemoveTransaction(Idx: Integer);
240	<	procedure RemoveTransactions;
241	<	procedure SetHandle(Value: TISC_DB_HANDLE);
242	<
243	<	property Handle: TISC_DB_HANDLE read FHandle;
244	<	property IsReadOnly: Boolean read GetIsReadOnly;
245	<	property DBParamByDPB[const Idx: Integer]: String read GetDBParamByDPB
246	<	write SetDBParamByDPB;
247	<	property SQLObjectCount: Integer read GetSQLObjectCount;
248	<	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
249	<	property HandleIsShared: Boolean read FHandleIsShared;
250	<	property TransactionCount: Integer read GetTransactionCount;
251	<	property Transactions[Index: Integer]: TIBTransaction read GetTransaction;
252	<	property InternalTransaction: TIBTransaction read FInternalTransaction;
253	<
254	<	published
255	<	property Connected;
256	<	property AllowStreamedConnected: boolean read FAllowStreamedConnected
257	<	write FAllowStreamedConnected;
258	<	property DatabaseName: TIBFileName read FDBName write SetDatabaseName;
259	<	property Params: TStrings read FDBParams write SetDBParams;
260	<	property LoginPrompt default True;
261	<	property DefaultTransaction: TIBTransaction read FDefaultTransaction
262	<	write SetDefaultTransaction;
263	<	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer;
264	<	property SQLDialect : Integer read GetSQLDialect write SetSQLDialect default 3;
265	<	property DBSQLDialect : Integer read FDBSQLDialect;
266	<	property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
267	<	property AfterConnect;
268	<	property AfterDisconnect;
269	<	property BeforeConnect;
270	<	property BeforeDisconnect;
271	<	property OnLogin: TIBDatabaseLoginEvent read FOnLogin write FOnLogin;
272	<	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
273	<	property OnDialectDowngradeWarning: TNotifyEvent read FOnDialectDowngradeWarning write FOnDialectDowngradeWarning;
274	<	end;
275	<
276	<	{ TIBTransaction }
277	<
278	<	TTransactionAction         = (TARollback, TACommit, TARollbackRetaining, TACommitRetaining);
279	<
280	<	TIBTransaction = class(TComponent)
281	<	private
282	<	FIBLoaded: Boolean;
283	<	FCanTimeout         : Boolean;
284	<	FDatabases          : TList;
285	<	FSQLObjects         : TList;
286	<	FDefaultDatabase    : TIBDatabase;
287	<	FHandle             : TISC_TR_HANDLE;
288	<	FHandleIsShared     : Boolean;
289	<	FOnIdleTimer          : TNotifyEvent;
290	<	FStreamedActive     : Boolean;
291	<	FTPB                : PChar;
292	<	FTPBLength          : Short;
293	<	FTimer              : TTimer;
294	<	FDefaultAction      : TTransactionAction;
295	<	FTRParams           : TStrings;
296	<	FTRParamsChanged    : Boolean;
297	<	FInEndTransaction   : boolean;
298	<	procedure EnsureNotInTransaction;
299	<	procedure EndTransaction(Action: TTransactionAction; Force: Boolean);
300	<	function GetDatabase(Index: Integer): TIBDatabase;
301	<	function GetDatabaseCount: Integer;
302	<	function GetSQLObject(Index: Integer): TIBBase;
303	<	function GetSQLObjectCount: Integer;
304	<	function GetInTransaction: Boolean;
305	<	function GetIdleTimer: Integer;
306	<	procedure BeforeDatabaseDisconnect(DB: TIBDatabase);
307	<	procedure SetActive(Value: Boolean);
308	<	procedure SetDefaultAction(Value: TTransactionAction);
309	<	procedure SetDefaultDatabase(Value: TIBDatabase);
310	<	procedure SetIdleTimer(Value: Integer);
311	<	procedure SetTRParams(Value: TStrings);
312	<	procedure TimeoutTransaction(Sender: TObject);
313	<	procedure TRParamsChange(Sender: TObject);
314	<	procedure TRParamsChanging(Sender: TObject);
315	<	function AddSQLObject(ds: TIBBase): Integer;
316	<	procedure RemoveSQLObject(Idx: Integer);
317	<	procedure RemoveSQLObjects;
318	<
319	<	protected
320	<	procedure Loaded; override;
321	<	procedure SetHandle(Value: TISC_TR_HANDLE);
322	<	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
323	<
324	<	public
325	<	constructor Create(AOwner: TComponent); override;
326	<	destructor Destroy; override;
327	<	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
328	<	procedure Commit;
329	<	procedure CommitRetaining;
330	<	procedure Rollback;
331	<	procedure RollbackRetaining;
332	<	procedure StartTransaction;
333	<	procedure CheckInTransaction;
334	<	procedure CheckNotInTransaction;
335	<
336	<	function AddDatabase(db: TIBDatabase): Integer;
337	<	function FindDatabase(db: TIBDatabase): Integer;
338	<	function FindDefaultDatabase: TIBDatabase;
339	<	procedure RemoveDatabase(Idx: Integer);
340	<	procedure RemoveDatabases;
341	<	procedure CheckDatabasesInList;
342	<
343	<	property DatabaseCount: Integer read GetDatabaseCount;
344	<	property Databases[Index: Integer]: TIBDatabase read GetDatabase;
345	<	property SQLObjectCount: Integer read GetSQLObjectCount;
346	<	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
347	<	property Handle: TISC_TR_HANDLE read FHandle;
348	<	property HandleIsShared: Boolean read FHandleIsShared;
349	<	property InTransaction: Boolean read GetInTransaction;
350	<	property TPB: PChar read FTPB;
351	<	property TPBLength: Short read FTPBLength;
352	<	published
353	<	property Active: Boolean read GetInTransaction write SetActive;
354	<	property DefaultDatabase: TIBDatabase read FDefaultDatabase
355	<	write SetDefaultDatabase;
356	<	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer default 0;
357	<	property DefaultAction: TTransactionAction read FDefaultAction write SetDefaultAction default taCommit;
358	<	property Params: TStrings read FTRParams write SetTRParams;
359	<	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
360	<	end;
361	<
362	<	{ TIBBase }
363	<
364	<	{ Virtually all components in IB are "descendents" of TIBBase.
365	<	It is to more easily manage the database and transaction
366	<	connections. }
367	<	TIBBase = class(TObject)
368	<	protected
369	<	FDatabase: TIBDatabase;
370	<	FIndexInDatabase: Integer;
371	<	FTransaction: TIBTransaction;
372	<	FIndexInTransaction: Integer;
373	<	FOwner: TObject;
374	<	FBeforeDatabaseDisconnect: TNotifyEvent;
375	<	FAfterDatabaseDisconnect: TNotifyEvent;
376	<	FAfterDatabaseConnect: TNotifyEvent;
377	<	FOnDatabaseFree: TNotifyEvent;
378	<	FBeforeTransactionEnd: TNotifyEvent;
379	<	FAfterTransactionEnd: TNotifyEvent;
380	<	FOnTransactionFree: TNotifyEvent;
381	<
382	<	procedure DoAfterDatabaseConnect; virtual;
383	<	procedure DoBeforeDatabaseDisconnect; virtual;
384	<	procedure DoAfterDatabaseDisconnect; virtual;
385	<	procedure DoDatabaseFree; virtual;
386	<	procedure DoBeforeTransactionEnd; virtual;
387	<	procedure DoAfterTransactionEnd; virtual;
388	<	procedure DoTransactionFree; virtual;
389	<	function GetDBHandle: PISC_DB_HANDLE; virtual;
390	<	function GetTRHandle: PISC_TR_HANDLE; virtual;
391	<	procedure SetDatabase(Value: TIBDatabase); virtual;
392	<	procedure SetTransaction(Value: TIBTransaction); virtual;
393	<	public
394	<	constructor Create(AOwner: TObject);
395	<	destructor Destroy; override;
396	<	procedure CheckDatabase; virtual;
397	<	procedure CheckTransaction; virtual;
398	<	public
399	<	property AfterDatabaseConnect: TNotifyEvent read FAfterDatabaseConnect
400	<	write FAfterDatabaseConnect;
401	<	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
402	<	write FBeforeDatabaseDisconnect;
403	<	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
404	<	write FAfterDatabaseDisconnect;
405	<	property OnDatabaseFree: TNotifyEvent read FOnDatabaseFree write FOnDatabaseFree;
406	<	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd write FBeforeTransactionEnd;
407	<	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd write FAfterTransactionEnd;
408	<	property OnTransactionFree: TNotifyEvent read FOnTransactionFree write FOnTransactionFree;
409	<	property Database: TIBDatabase read FDatabase
410	<	write SetDatabase;
411	<	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
412	<	property Owner: TObject read FOwner;
413	<	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
414	<	property Transaction: TIBTransaction read FTransaction
415	<	write SetTransaction;
416	<	end;
417	<
418	<	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
419	<	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
420	<
421	<
422	<	implementation
423	<
424	<	uses IBIntf, IBSQLMonitor, IBCustomDataSet, IBDatabaseInfo, IBSQL, IBUtils,
425	<	typInfo;
426	<
427	<	{ TIBDatabase }
428	<
429	<	constructor TIBDatabase.Create(AOwner: TComponent);
430	<	{$ifdef WINDOWS}
431	<	var acp: uint;
432	<	{$endif}
433	<	begin
434	<	inherited Create(AOwner);
435	<	FIBLoaded := False;
436	<	CheckIBLoaded;
437	<	FIBLoaded := True;
438	<	LoginPrompt := True;
439	<	FSQLObjects := TList.Create;
440	<	FTransactions := TList.Create;
441	<	FDBName := '';
442	<	FDBParams := TStringList.Create;
443	<	{$ifdef UNIX}
444	<	if csDesigning in ComponentState then
445	<	FDBParams.Add('lc_ctype=UTF-8');
446	<	{$else}
447	<	{$ifdef WINDOWS}
448	<	if csDesigning in ComponentState then
449	<	begin
450	<	acp := GetACP;
451	<	if (acp >= 1250) and (acp <= 1254) then
452	<	FDBParams.Values['lc_ctype'] := Format('WIN%d',[acp]);
453	<	end;
454	<	{$endif}
455	<	{$endif}
456	<	FDBParamsChanged := True;
457	<	TStringList(FDBParams).OnChange := DBParamsChange;
458	<	TStringList(FDBParams).OnChanging := DBParamsChanging;
459	<	FDPB := nil;
460	<	FHandle := nil;
461	<	FUserNames := nil;
462	<	FInternalTransaction := TIBTransaction.Create(self);
463	<	FInternalTransaction.DefaultDatabase := Self;
464	<	FTimer := TTimer.Create(Self);
465	<	FTimer.Enabled := False;
466	<	FTimer.Interval := 0;
467	<	FTimer.OnTimer := TimeoutConnection;
468	<	FDBSQLDialect := 1;
469	<	FSQLDialect := 3;
470	<	FTraceFlags := [];
471	<	FDataSets := TList.Create;
472	<	CheckStreamConnect;
473	<	end;
474	<
475	<	destructor TIBDatabase.Destroy;
476	<	var
477	<	i: Integer;
478	<	begin
479	<	if FIBLoaded then
480	<	begin
481	<	IdleTimer := 0;
482	<	if FHandle <> nil then
483	<	ForceClose;
484	<	for i := 0 to FSQLObjects.Count - 1 do
485	<	if FSQLObjects[i] <> nil then
486	<	SQLObjects[i].DoDatabaseFree;
487	<	RemoveSQLObjects;
488	<	RemoveTransactions;
489	<	FInternalTransaction.Free;
490	<	FreeMem(FDPB);
491	<	FDPB := nil;
492	<	FDBParams.Free;
493	<	FSQLObjects.Free;
494	<	FUserNames.Free;
495	<	FTransactions.Free;
496	<	end;
497	<	FDataSets.Free;
498	<	inherited Destroy;
499	<	end;
500	<
501	<	function TIBDatabase.Call(ErrCode: ISC_STATUS;
502	<	RaiseError: Boolean): ISC_STATUS;
503	<	begin
504	<	result := ErrCode;
505	<	FCanTimeout := False;
506	<	if RaiseError and (ErrCode > 0) then
507	<	IBDataBaseError;
508	<	end;
509	<
510	<	procedure TIBDatabase.CheckActive;
511	<	begin
512	<	if StreamedConnected and (not Connected) then
513	<	Loaded;
514	<	if FHandle = nil then
515	<	IBError(ibxeDatabaseClosed, [nil]);
516	<	end;
517	<
518	<	procedure TIBDatabase.EnsureInactive;
519	<	begin
520	<	if csDesigning in ComponentState then
521	<	begin
522	<	if FHandle <> nil then
523	<	Close;
524	<	end
525	<	end;
526	<
527	<	procedure TIBDatabase.CheckInactive;
528	<	begin
529	<	if FHandle <> nil then
530	<	IBError(ibxeDatabaseOpen, [nil]);
531	<	end;
532	<
533	<	procedure TIBDatabase.CheckDatabaseName;
534	<	begin
535	<	if (FDBName = '') then
536	<	IBError(ibxeDatabaseNameMissing, [nil]);
537	<	end;
538	<
539	<	function TIBDatabase.AddSQLObject(ds: TIBBase): Integer;
540	<	begin
541	<	result := 0;
542	<	if (ds.Owner is TIBCustomDataSet) then
543	<	FDataSets.Add(ds.Owner);
544	<	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
545	<	Inc(result);
546	<	if (result = FSQLObjects.Count) then
547	<	FSQLObjects.Add(ds)
548	<	else
549	<	FSQLObjects[result] := ds;
550	<	end;
551	<
552	<	function TIBDatabase.AddTransaction(TR: TIBTransaction): Integer;
553	<	begin
554	<	result := FindTransaction(TR);
555	<	if result <> -1 then
556	<	begin
557	<	result := -1;
558	<	exit;
559	<	end;
560	<	result := 0;
561	<	while (result < FTransactions.Count) and (FTransactions[result] <> nil) do
562	<	Inc(result);
563	<	if (result = FTransactions.Count) then
564	<	FTransactions.Add(TR)
565	<	else
566	<	FTransactions[result] := TR;
567	<	end;
568	<
569	<	procedure TIBDatabase.DoDisconnect;
570	<	begin
571	<	if Connected then
572	<	InternalClose(False);
573	<	FDBSQLDialect := 1;
574	<	end;
575	<
576	<	procedure TIBDatabase.CreateDatabase;
577	<	var
578	<	tr_handle: TISC_TR_HANDLE;
579	<	begin
580	<	CheckInactive;
581	<	tr_handle := nil;
582	<	Call(
583	<	isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0,
584	<	PChar('CREATE DATABASE ''' + FDBName + ''' ' + {do not localize}
585	<	Params.Text), SQLDialect, nil),
586	<	True);
587	<	end;
588	<
589	<	procedure TIBDatabase.DropDatabase;
590	<	begin
591	<	CheckActive;
592	<	Call(isc_drop_database(StatusVector, @FHandle), True);
593	<	end;
594	<
595	<	procedure TIBDatabase.DBParamsChange(Sender: TObject);
596	<	begin
597	<	FDBParamsChanged := True;
598	<	end;
599	<
600	<	procedure TIBDatabase.DBParamsChanging(Sender: TObject);
601	<	begin
602	<	EnsureInactive;
603	<	CheckInactive;
604	<	end;
605	<
606	<	function TIBDatabase.FindTransaction(TR: TIBTransaction): Integer;
607	<	var
608	<	i: Integer;
609	<	begin
610	<	result := -1;
611	<	for i := 0 to FTransactions.Count - 1 do
612	<	if TR = Transactions[i] then
613	<	begin
614	<	result := i;
615	<	break;
616	<	end;
617	<	end;
618	<
619	<	function TIBDatabase.FindDefaultTransaction(): TIBTransaction;
620	<	var
621	<	i: Integer;
622	<	begin
623	<	result := FDefaultTransaction;
624	<	if result = nil then
625	<	begin
626	<	for i := 0 to FTransactions.Count - 1 do
627	<	if (Transactions[i] <> nil) and
628	<	(TIBTransaction(Transactions[i]).DefaultDatabase = self) and
629	<	(TIBTransaction(Transactions[i]) <> FInternalTransaction) then
630	<	begin
631	<	result := TIBTransaction(Transactions[i]);
632	<	break;
633	<	end;
634	<	end;
635	<	end;
636	<
637	<	procedure TIBDatabase.ForceClose;
638	<	begin
639	<	if Connected then
640	<	InternalClose(True);
641	<	end;
642	<
643	<	function TIBDatabase.GetConnected: Boolean;
644	<	begin
645	<	result := FHandle <> nil;
646	<	end;
647	<
648	<	function TIBDatabase.GetSQLObject(Index: Integer): TIBBase;
649	<	begin
650	<	result := FSQLObjects[Index];
651	<	end;
652	<
653	<	function TIBDatabase.GetSQLObjectCount: Integer;
654	<	var
655	<	i: Integer;
656	<	begin
657	<	result := 0;
658	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
659	<	Inc(result);
660	<	end;
661	<
662	<	function TIBDatabase.GetDBParamByDPB(const Idx: Integer): String;
663	<	var
664	<	ConstIdx, EqualsIdx: Integer;
665	<	begin
666	<	if (Idx > 0) and (Idx <= isc_dpb_last_dpb_constant) then
667	<	begin
668	<	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
669	<	if ConstIdx = -1 then
670	<	result := ''
671	<	else
672	<	begin
673	<	result := Params[ConstIdx];
674	<	EqualsIdx := Pos('=', result); {mbcs ok}
675	<	if EqualsIdx = 0 then
676	<	result := ''
677	<	else
678	<	result := Copy(result, EqualsIdx + 1, Length(result));
679	<	end;
680	<	end
681	<	else
682	<	result := '';
683	<	end;
684	<
685	<	function TIBDatabase.GetIdleTimer: Integer;
686	<	begin
687	<	result := FTimer.Interval;
688	<	end;
689	<
690	<	function TIBDatabase.GetTransaction(Index: Integer): TIBTransaction;
691	<	begin
692	<	result := FTransactions[Index];
693	<	end;
694	<
695	<	function TIBDatabase.GetTransactionCount: Integer;
696	<	var
697	<	i: Integer;
698	<	begin
699	<	result := 0;
700	<	for i := 0 to FTransactions.Count - 1 do
701	<	if FTransactions[i] <> nil then
702	<	Inc(result);
703	<	end;
704	<
705	<	function TIBDatabase.IndexOfDBConst(st: String): Integer;
706	<	var
707	<	i, pos_of_str: Integer;
708	<	begin
709	<	result := -1;
710	<	for i := 0 to Params.Count - 1 do
711	<	begin
712	<	pos_of_str := Pos(st, AnsiLowerCase(Params[i])); {mbcs ok}
713	<	if (pos_of_str = 1) or (pos_of_str = Length(DPBPrefix) + 1) then
714	<	begin
715	<	result := i;
716	<	break;
717	<	end;
718	<	end;
719	<	end;
720	<
721	<	procedure TIBDatabase.InternalClose(Force: Boolean);
722	<	var
723	<	i: Integer;
724	<	begin
725	<	CheckActive;
726	<	{ Tell all connected transactions that we're disconnecting.
727	<	This is so transactions can commit/rollback, accordingly
728	<	}
729	<	for i := 0 to FTransactions.Count - 1 do
730	<	begin
731	<	try
732	<	if FTransactions[i] <> nil then
733	<	Transactions[i].BeforeDatabaseDisconnect(Self);
734	<	except
735	<	if not Force then
736	<	raise;
737	<	end;
738	<	end;
739	<	for i := 0 to FSQLObjects.Count - 1 do
740	<	begin
741	<	try
742	<	if FSQLObjects[i] <> nil then
743	<	SQLObjects[i].DoBeforeDatabaseDisconnect;
744	<	except
745	<	if not Force then
746	<	raise;
747	<	end;
748	<	end;
749	<
750	<	if (not HandleIsShared) and
751	<	(Call(isc_detach_database(StatusVector, @FHandle), False) > 0) and
752	<	(not Force) then
753	<	IBDataBaseError
754	<	else
755	<	begin
756	<	FHandle := nil;
757	<	FHandleIsShared := False;
758	<	end;
759	<
760	<	if not (csDesigning in ComponentState) then
761	<	MonitorHook.DBDisconnect(Self);
762	<
763	<	for i := 0 to FSQLObjects.Count - 1 do
764	<	if FSQLObjects[i] <> nil then
765	<	SQLObjects[i].DoAfterDatabaseDisconnect;
766	<	end;
767	<
768	<	procedure TIBDataBase.CheckStreamConnect;
769	<	var
770	<	i: integer;
771	<	begin
772	<	try
773	<	if not (csDesigning in ComponentState) and StreamedConnected and (not Connected) then
774	<	begin
775	<	for i := 0 to FTransactions.Count - 1 do
776	<	if  FTransactions[i] <> nil then
777	<	begin
778	<	with TIBTransaction(FTransactions[i]) do
779	<	if not Active then
780	<	if FStreamedActive and not InTransaction then
781	<	begin
782	<	StartTransaction;
783	<	FStreamedActive := False;
784	<	end;
785	<	end;
786	<	if (FDefaultTransaction <> nil) and
787	<	(FDefaultTransaction.FStreamedActive) and
788	<	(not FDefaultTransaction.InTransaction) then
789	<	FDefaultTransaction.StartTransaction;
790	<	FStreamedConnected := False;
791	<	end;
792	<	except
793	<	if csDesigning in ComponentState then
794	<	Application.HandleException(Self)
795	<	else
796	<	raise;
797	<	end;
798	<	end;
799	<
800	<	procedure TIBDatabase.Notification( AComponent: TComponent;
801	<	Operation: TOperation);
802	<	var
803	<	i: Integer;
804	<	begin
805	<	inherited Notification( AComponent, Operation);
806	<	if (Operation = opRemove) and (AComponent = FDefaultTransaction) then
807	<	begin
808	<	i := FindTransaction(FDefaultTransaction);
809	<	if (i <> -1) then
810	<	RemoveTransaction(i);
811	<	FDefaultTransaction := nil;
812	<	end;
813	<	end;
814	<
815	<	function TIBDatabase.Login: Boolean;
816	<	var
817	<	IndexOfUser, IndexOfPassword: Integer;
818	<	Username, Password, OldPassword: String;
819	<	LoginParams: TStrings;
820	<
821	<	procedure HidePassword;
822	<	var
823	<	I: Integer;
824	<	IndexAt: Integer;
825	<	begin
826	<	IndexAt := 0;
827	<	for I := 0 to Params.Count -1 do
828	<	if Pos('password', LowerCase(Trim(Params.Names[i]))) = 1 then {mbcs ok}
829	<	begin
830	<	FHiddenPassword := Params.Values[Params.Names[i]];
831	<	IndexAt := I;
832	<	break;
833	<	end;
834	<	if IndexAt <> 0 then
835	<	Params.Delete(IndexAt);
836	<	end;
837	<
838	<	begin
839	<	Result := false;
840	<	if FLoginCalled then Exit;
841	<	FLoginCalled := true;
842	<	try
843	<	if Assigned(FOnLogin) and not (csDesigning in ComponentState) then
844	<	begin
845	<	result := True;
846	<	LoginParams := TStringList.Create;
847	<	try
848	<	LoginParams.Assign(Params);
849	<	FOnLogin(Self, LoginParams);
850	<	Params.Assign (LoginParams);
851	<	HidePassword;
852	<	finally
853	<	LoginParams.Free;
854	<	end;
855	<	end
856	<	else
857	<	begin
858	<	IndexOfUser := IndexOfDBConst(DPBConstantNames[isc_dpb_user_name]);
859	<	if IndexOfUser <> -1 then
860	<	Username := Copy(Params[IndexOfUser],
861	<	Pos('=', Params[IndexOfUser]) + 1, {mbcs ok}
862	<	Length(Params[IndexOfUser]));
863	<	IndexOfPassword := IndexOfDBConst(DPBConstantNames[isc_dpb_password]);
864	<	if IndexOfPassword <> -1 then
865	<	begin
866	<	Password := Copy(Params[IndexOfPassword],
867	<	Pos('=', Params[IndexOfPassword]) + 1, {mbcs ok}
868	<	Length(Params[IndexOfPassword]));
869	<	OldPassword := password;
870	<	end;
871	<	result := LoginDialogEx(DatabaseName, Username, Password, False);
872	<	if result then
873	<	begin
874	<	if IndexOfUser = -1 then
875	<	Params.Add(DPBConstantNames[isc_dpb_user_name] + '=' + Username)
876	<	else
877	<	Params[IndexOfUser] := DPBConstantNames[isc_dpb_user_name] +
878	<	'=' + Username;
879	<	if (Password = OldPassword) then
880	<	FHiddenPassword := ''
881	<	else
882	<	begin
883	<	FHiddenPassword := Password;
884	<	if OldPassword <> '' then
885	<	HidePassword;
886	<	end;
887	<	end;
888	<	end;
889	<	finally
890	<	FLoginCalled := false
891	<	end;
892	<	end;
893	<
894	<	procedure TIBDatabase.DoConnect;
895	<	var
896	<	DPB: String;
897	<	TempDBParams: TStrings;
898	<	I: integer;
899	<
900	<	begin
901	<	CheckInactive;
902	<	CheckDatabaseName;
903	<	if (not LoginPrompt) and (FHiddenPassword <> '') then
904	<	begin
905	<	FHiddenPassword := '';
906	<	FDBParamsChanged := True;
907	<	end;
908	<	{ Use builtin login prompt if requested }
909	<	if (LoginPrompt or (csDesigning in ComponentState)) and not Login then
910	<	IBError(ibxeOperationCancelled, [nil]);
911	<	{ Generate a new DPB if necessary }
912	<	if (FDBParamsChanged) then
913	<	begin
914	<	FDBParamsChanged := False;
915	<	if (not LoginPrompt and not (csDesigning in ComponentState)) or (FHiddenPassword = '') then
916	<	GenerateDPB(FDBParams, DPB, FDPBLength)
917	<	else
918	<	begin
919	<	TempDBParams := TStringList.Create;
920	<	try
921	<	TempDBParams.Assign(FDBParams);
922	<	TempDBParams.Add('password=' + FHiddenPassword);
923	<	GenerateDPB(TempDBParams, DPB, FDPBLength);
924	<	finally
925	<	TempDBParams.Free;
926	<	end;
927	<	end;
928	<	IBAlloc(FDPB, 0, FDPBLength);
929	<	Move(DPB[1], FDPB[0], FDPBLength);
930	<	end;
931	<	if Call(isc_attach_database(StatusVector, Length(FDBName),
932	<	PChar(FDBName), @FHandle,
933	<	FDPBLength, FDPB), False) > 0 then
934	<	begin
935	<	FHandle := nil;
936	<	IBDataBaseError;
937	<	end;
938	<	FDBSQLDialect := GetDBSQLDialect;
939	<	ValidateClientSQLDialect;
940	<	for i := 0 to FSQLObjects.Count - 1 do
941	<	begin
942	<	if FSQLObjects[i] <> nil then
943	<	SQLObjects[i].DoAfterDatabaseConnect;
944	<	end;
945	<	if not (csDesigning in ComponentState) then
946	<	MonitorHook.DBConnect(Self);
947	<	end;
948	<
949	<	procedure TIBDatabase.RemoveSQLObject(Idx: Integer);
950	<	var
951	<	ds: TIBBase;
952	<	begin
953	<	if (Idx >= 0) and (FSQLObjects[Idx] <> nil) then
954	<	begin
955	<	ds := SQLObjects[Idx];
956	<	FSQLObjects[Idx] := nil;
957	<	ds.Database := nil;
958	<	if (ds.owner is TDataSet) then
959	<	FDataSets.Remove(TDataSet(ds.Owner));
960	<	end;
961	<	end;
962	<
963	<	procedure TIBDatabase.RemoveSQLObjects;
964	<	var
965	<	i: Integer;
966	<	begin
967	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
968	<	begin
969	<	RemoveSQLObject(i);
970	<	if (TIBBase(FSQLObjects[i]).owner is TDataSet) then
971	<	FDataSets.Remove(TDataSet(TIBBase(FSQLObjects[i]).owner));
972	<	end;
973	<	end;
974	<
975	<	procedure TIBDatabase.RemoveTransaction(Idx: Integer);
976	<	var
977	<	TR: TIBTransaction;
978	<	begin
979	<	if ((Idx >= 0) and (FTransactions[Idx] <> nil)) then
980	<	begin
981	<	TR := Transactions[Idx];
982	<	FTransactions[Idx] := nil;
983	<	TR.RemoveDatabase(TR.FindDatabase(Self));
984	<	if TR = FDefaultTransaction then
985	<	FDefaultTransaction := nil;
986	<	end;
987	<	end;
988	<
989	<	procedure TIBDatabase.RemoveTransactions;
990	<	var
991	<	i: Integer;
992	<	begin
993	<	for i := 0 to FTransactions.Count - 1 do if FTransactions[i] <> nil then
994	<	RemoveTransaction(i);
995	<	end;
996	<
997	<	procedure TIBDatabase.SetDatabaseName(const Value: TIBFileName);
998	<	begin
999	<	if FDBName <> Value then
1000	<	begin
1001	<	EnsureInactive;
1002	<	CheckInactive;
1003	<	FDBName := Value;
1004	<	end;
1005	<	end;
1006	<
1007	<	procedure TIBDatabase.SetDBParamByDPB(const Idx: Integer; Value: String);
1008	<	var
1009	<	ConstIdx: Integer;
1010	<	begin
1011	<	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
1012	<	if (Value = '') then
1013	<	begin
1014	<	if ConstIdx <> -1 then
1015	<	Params.Delete(ConstIdx);
1016	<	end
1017	<	else
1018	<	begin
1019	<	if (ConstIdx = -1) then
1020	<	Params.Add(DPBConstantNames[Idx] + '=' + Value)
1021	<	else
1022	<	Params[ConstIdx] := DPBConstantNames[Idx] + '=' + Value;
1023	<	end;
1024	<	end;
1025	<
1026	<	procedure TIBDatabase.SetDBParams(Value: TStrings);
1027	<	begin
1028	<	FDBParams.Assign(Value);
1029	<	end;
1030	<
1031	<	procedure TIBDatabase.SetDefaultTransaction(Value: TIBTransaction);
1032	<	var
1033	<	i: Integer;
1034	<	begin
1035	<	if (FDefaultTransaction <> nil) and (FDefaultTransaction <> Value) then
1036	<	begin
1037	<	i := FindTransaction(FDefaultTransaction);
1038	<	if (i <> -1) and (FDefaultTransaction.DefaultDatabase <> self) then
1039	<	RemoveTransaction(i);
1040	<	end;
1041	<	if (Value <> nil) and (FDefaultTransaction <> Value) then
1042	<	begin
1043	<	Value.AddDatabase(Self);
1044	<	AddTransaction(Value);
1045	<	end;
1046	<	FDefaultTransaction := Value;
1047	<	end;
1048	<
1049	<	procedure TIBDatabase.SetHandle(Value: TISC_DB_HANDLE);
1050	<	begin
1051	<	if HandleIsShared then
1052	<	Close
1053	<	else
1054	<	CheckInactive;
1055	<	FHandle := Value;
1056	<	FHandleIsShared := (Value <> nil);
1057	<	end;
1058	<
1059	<	procedure TIBDatabase.SetIdleTimer(Value: Integer);
1060	<	begin
1061	<	if Value < 0 then
1062	<	IBError(ibxeTimeoutNegative, [nil])
1063	<	else
1064	<	if (Value = 0) then
1065	<	begin
1066	<	FTimer.Enabled := False;
1067	<	FTimer.Interval := 0;
1068	<	end
1069	<	else
1070	<	if (Value > 0) then
1071	<	begin
1072	<	FTimer.Interval := Value;
1073	<	if not (csDesigning in ComponentState) then
1074	<	FTimer.Enabled := True;
1075	<	end;
1076	<	end;
1077	<
1078	<	function TIBDatabase.TestConnected: Boolean;
1079	<	var
1080	<	DatabaseInfo: TIBDatabaseInfo;
1081	<	begin
1082	<	result := Connected;
1083	<	if result then
1084	<	begin
1085	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1086	<	try
1087	<	DatabaseInfo.Database := self;
1088	<	{ poke the server to see if connected }
1089	<	if DatabaseInfo.BaseLevel = 0 then ;
1090	<	DatabaseInfo.Free;
1091	<	except
1092	<	ForceClose;
1093	<	result := False;
1094	<	DatabaseInfo.Free;
1095	<	end;
1096	<	end;
1097	<	end;
1098	<
1099	<	procedure TIBDatabase.TimeoutConnection(Sender: TObject);
1100	<	begin
1101	<	if Connected then
1102	<	begin
1103	<	if FCanTimeout then
1104	<	begin
1105	<	ForceClose;
1106	<	if Assigned(FOnIdleTimer) then
1107	<	FOnIdleTimer(Self);
1108	<	end
1109	<	else
1110	<	FCanTimeout := True;
1111	<	end;
1112	<	end;
1113	<
1114	<	function TIBDatabase.GetIsReadOnly: Boolean;
1115	<	var
1116	<	DatabaseInfo: TIBDatabaseInfo;
1117	<	begin
1118	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1119	<	DatabaseInfo.Database := self;
1120	<	if (DatabaseInfo.ODSMajorVersion < 10) then
1121	<	result := false
1122	<	else
1123	<	begin
1124	<	if (DatabaseInfo.ReadOnly = 0) then
1125	<	result := false
1126	<	else
1127	<	result := true;
1128	<	end;
1129	<	DatabaseInfo.Free;
1130	<	end;
1131	<
1132	<	function TIBDatabase.GetSQLDialect: Integer;
1133	<	begin
1134	<	Result := FSQLDialect;
1135	<	end;
1136	<
1137	<
1138	<	procedure TIBDatabase.SetSQLDialect(const Value: Integer);
1139	<	begin
1140	<	if (Value < 1) then IBError(ibxeSQLDialectInvalid, [nil]);
1141	<	if ((FHandle = nil) or (Value <= FDBSQLDialect))  then
1142	<	FSQLDialect := Value
1143	<	else
1144	<	IBError(ibxeSQLDialectInvalid, [nil]);
1145	<	end;
1146	<
1147	<	function TIBDatabase.GetDBSQLDialect: Integer;
1148	<	var
1149	<	DatabaseInfo: TIBDatabaseInfo;
1150	<	begin
1151	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1152	<	DatabaseInfo.Database := self;
1153	<	result := DatabaseInfo.DBSQLDialect;
1154	<	DatabaseInfo.Free;
1155	<	end;
1156	<
1157	<	procedure TIBDatabase.ValidateClientSQLDialect;
1158	<	begin
1159	<	if (FDBSQLDialect < FSQLDialect) then
1160	<	begin
1161	<	FSQLDialect := FDBSQLDialect;
1162	<	if Assigned (FOnDialectDowngradeWarning) then
1163	<	FOnDialectDowngradeWarning(self);
1164	<	end;
1165	<	end;
1166	<
1167	<	procedure TIBDatabase.ApplyUpdates(const DataSets: array of TDataSet);
1168	<	var
1169	<	I: Integer;
1170	<	DS: TIBCustomDataSet;
1171	<	TR: TIBTransaction;
1172	<	begin
1173	<	TR := nil;
1174	<	for I := 0 to High(DataSets) do
1175	<	begin
1176	<	DS := TIBCustomDataSet(DataSets[I]);
1177	<	if DS.Database <> Self then
1178	<	IBError(ibxeUpdateWrongDB, [nil]);
1179	<	if TR = nil then
1180	<	TR := DS.Transaction;
1181	<	if (DS.Transaction <> TR) or (TR = nil) then
1182	<	IBError(ibxeUpdateWrongTR, [nil]);
1183	<	end;
1184	<	TR.CheckInTransaction;
1185	<	for I := 0 to High(DataSets) do
1186	<	begin
1187	<	DS := TIBCustomDataSet(DataSets[I]);
1188	<	DS.ApplyUpdates;
1189	<	end;
1190	<	TR.CommitRetaining;
1191	<	end;
1192	<
1193	<	procedure TIBDatabase.CloseDataSets;
1194	<	var
1195	<	i: Integer;
1196	<	begin
1197	<	for i := 0 to DataSetCount - 1 do
1198	<	if (DataSets[i] <> nil) then
1199	<	DataSets[i].close;
1200	<	end;
1201	<
1202	<	function TIBDatabase.GetDataset(Index : longint) : TDataset;
1203	<	begin
1204	<	if (Index >= 0) and (Index < FDataSets.Count) then
1205	<	Result := TDataSet(FDataSets[Index])
1206	<	else
1207	<	raise Exception.Create('Invalid Index to DataSets');
1208	<	end;
1209	<
1210	<	function TIBDatabase.GetDataSetCount : Longint;
1211	<	begin
1212	<	Result := FDataSets.Count;
1213	<	end;
1214	<
1215	<	procedure TIBDataBase.ReadState(Reader: TReader);
1216	<	begin
1217	<	FDBParams.Clear;
1218	<	inherited ReadState(Reader);
1219	<	end;
1220	<
1221	<	procedure TIBDataBase.SetConnected(Value: boolean);
1222	<	begin
1223	<	if StreamedConnected and not AllowStreamedConnected then
1224	<	begin
1225	<	StreamedConnected := false;
1226	<	Value := false
1227	<	end;
1228	<	inherited SetConnected(Value);
1229	<	end;
1230	<
1231	<	procedure TIBDatabase.GetFieldNames(const TableName: string; List: TStrings);
1232	<	var
1233	<	Query: TIBSQL;
1234	<	begin
1235	<	if TableName = '' then
1236	<	IBError(ibxeNoTableName, [nil]);
1237	<	if not Connected then
1238	<	Open;
1239	<	if not FInternalTransaction.Active then
1240	<	FInternalTransaction.StartTransaction;
1241	<	Query := TIBSQL.Create(self);
1242	<	try
1243	<	Query.GoToFirstRecordOnExecute := False;
1244	<	Query.Database := Self;
1245	<	Query.Transaction := FInternalTransaction;
1246	<	Query.SQL.Text := 'Select R.RDB$FIELD_NAME ' + {do not localize}
1247	<	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
1248	<	'where R.RDB$RELATION_NAME = ' + {do not localize}
1249	<	'''' +
1250	<	FormatIdentifierValue(SQLDialect, TableName) +
1251	<	''' ' +
1252	<	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '; {do not localize}
1253	<	Query.Prepare;
1254	<	Query.ExecQuery;
1255	<	with List do
1256	<	begin
1257	<	BeginUpdate;
1258	<	try
1259	<	Clear;
1260	<	while (not Query.EOF) and (Query.Next <> nil) do
1261	<	List.Add(TrimRight(Query.Current.ByName('RDB$FIELD_NAME').AsString)); {do not localize}
1262	<	finally
1263	<	EndUpdate;
1264	<	end;
1265	<	end;
1266	<	finally
1267	<	Query.free;
1268	<	FInternalTransaction.Commit;
1269	<	end;
1270	<	end;
1271	<
1272	<	procedure TIBDatabase.GetTableNames(List: TStrings; SystemTables: Boolean);
1273	<	var
1274	<	Query : TIBSQL;
1275	<	begin
1276	<	if not (csReading in ComponentState) then
1277	<	begin
1278	<	if not Connected then
1279	<	Open;
1280	<	if not FInternalTransaction.Active then
1281	<	FInternalTransaction.StartTransaction;
1282	<	Query := TIBSQL.Create(self);
1283	<	try
1284	<	Query.GoToFirstRecordOnExecute := False;
1285	<	Query.Database := Self;
1286	<	Query.Transaction := FInternalTransaction;
1287	<	if SystemTables then
1288	<	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1289	<	' where RDB$VIEW_BLR is NULL' {do not localize}
1290	<	else
1291	<	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1292	<	' where RDB$VIEW_BLR is NULL and RDB$SYSTEM_FLAG = 0'; {do not localize}
1293	<	Query.Prepare;
1294	<	Query.ExecQuery;
1295	<	with List do
1296	<	begin
1297	<	BeginUpdate;
1298	<	try
1299	<	Clear;
1300	<	while (not Query.EOF) and (Query.Next <> nil) do
1301	<	List.Add(TrimRight(Query.Current[0].AsString));
1302	<	finally
1303	<	EndUpdate;
1304	<	end;
1305	<	end;
1306	<	finally
1307	<	Query.Free;
1308	<	FInternalTransaction.Commit;
1309	<	end;
1310	<	end;
1311	<	end;
1312	<
1313	<	{ TIBTransaction }
1314	<
1315	<	constructor TIBTransaction.Create(AOwner: TComponent);
1316	<	begin
1317	<	inherited Create(AOwner);
1318	<	FIBLoaded := False;
1319	<	CheckIBLoaded;
1320	<	FIBLoaded := True;
1321	<	CheckIBLoaded;
1322	<	FDatabases := TList.Create;
1323	<	FSQLObjects := TList.Create;
1324	<	FHandle := nil;
1325	<	FTPB := nil;
1326	<	FTPBLength := 0;
1327	<	FTRParams := TStringList.Create;
1328	<	FTRParamsChanged := True;
1329	<	TStringList(FTRParams).OnChange := TRParamsChange;
1330	<	TStringList(FTRParams).OnChanging := TRParamsChanging;
1331	<	FTimer := TTimer.Create(Self);
1332	<	FTimer.Enabled := False;
1333	<	FTimer.Interval := 0;
1334	<	FTimer.OnTimer := TimeoutTransaction;
1335	<	FDefaultAction := taCommit;
1336	<	end;
1337	<
1338	<	destructor TIBTransaction.Destroy;
1339	<	var
1340	<	i: Integer;
1341	<	begin
1342	<	if FIBLoaded then
1343	<	begin
1344	<	if InTransaction then
1345	<	EndTransaction(FDefaultAction, True);
1346	<	for i := 0 to FSQLObjects.Count - 1 do
1347	<	if FSQLObjects[i] <> nil then
1348	<	SQLObjects[i].DoTransactionFree;
1349	<	RemoveSQLObjects;
1350	<	RemoveDatabases;
1351	<	FreeMem(FTPB);
1352	<	FTPB := nil;
1353	<	FTRParams.Free;
1354	<	FSQLObjects.Free;
1355	<	FDatabases.Free;
1356	<	end;
1357	<	inherited Destroy;
1358	<	end;
1359	<
1360	<	function TIBTransaction.Call(ErrCode: ISC_STATUS;
1361	<	RaiseError: Boolean): ISC_STATUS;
1362	<	var
1363	<	i: Integer;
1364	<	begin
1365	<	result := ErrCode;
1366	<	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1367	<	Databases[i].FCanTimeout := False;
1368	<	FCanTimeout := False;
1369	<	if RaiseError and (result > 0) then
1370	<	IBDataBaseError;
1371	<	end;
1372	<
1373	<	procedure TIBTransaction.CheckDatabasesInList;
1374	<	begin
1375	<	if GetDatabaseCount = 0 then
1376	<	IBError(ibxeNoDatabasesInTransaction, [nil]);
1377	<	end;
1378	<
1379	<	procedure TIBTransaction.CheckInTransaction;
1380	<	begin
1381	<	if FStreamedActive and (not InTransaction) then
1382	<	Loaded;
1383	<	if (FHandle = nil) then
1384	<	IBError(ibxeNotInTransaction, [nil]);
1385	<	end;
1386	<
1387	<	procedure TIBTransaction.EnsureNotInTransaction;
1388	<	begin
1389	<	if csDesigning in ComponentState then
1390	<	begin
1391	<	if FHandle <> nil then
1392	<	Rollback;
1393	<	end;
1394	<	end;
1395	<
1396	<	procedure TIBTransaction.CheckNotInTransaction;
1397	<	begin
1398	<	if (FHandle <> nil) then
1399	<	IBError(ibxeInTransaction, [nil]);
1400	<	end;
1401	<
1402	<	function TIBTransaction.AddDatabase(db: TIBDatabase): Integer;
1403	<	var
1404	<	i: Integer;
1405	<	NilFound: Boolean;
1406	<	begin
1407	<	i := FindDatabase(db);
1408	<	if i <> -1 then
1409	<	begin
1410	<	result := i;
1411	<	exit;
1412	<	end;
1413	<	NilFound := False;
1414	<	i := 0;
1415	<	while (not NilFound) and (i < FDatabases.Count) do
1416	<	begin
1417	<	NilFound := (FDatabases[i] = nil);
1418	<	if (not NilFound) then
1419	<	Inc(i);
1420	<	end;
1421	<	if (NilFound) then
1422	<	begin
1423	<	FDatabases[i] := db;
1424	<	result := i;
1425	<	end
1426	<	else
1427	<	begin
1428	<	result := FDatabases.Count;
1429	<	FDatabases.Add(db);
1430	<	end;
1431	<	end;
1432	<
1433	<	function TIBTransaction.AddSQLObject(ds: TIBBase): Integer;
1434	<	begin
1435	<	result := 0;
1436	<	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
1437	<	Inc(result);
1438	<	if (result = FSQLObjects.Count) then
1439	<	FSQLObjects.Add(ds)
1440	<	else
1441	<	FSQLObjects[result] := ds;
1442	<	end;
1443	<
1444	<	procedure TIBTransaction.Commit;
1445	<	begin
1446	<	EndTransaction(TACommit, False);
1447	<	end;
1448	<
1449	<	procedure TIBTransaction.CommitRetaining;
1450	<	begin
1451	<	EndTransaction(TACommitRetaining, False);
1452	<	end;
1453	<
1454	<	procedure TIBTransaction.EndTransaction(Action: TTransactionAction;
1455	<	Force: Boolean);
1456	<	var
1457	<	status: ISC_STATUS;
1458	<	i: Integer;
1459	<	begin
1460	<	CheckInTransaction;
1461	<	if FInEndTransaction then Exit;
1462	<	FInEndTransaction := true;
1463	<	try
1464	<	case Action of
1465	<	TARollback, TACommit:
1466	<	begin
1467	<	if (HandleIsShared) and
1468	<	(Action <> FDefaultAction) and
1469	<	(not Force) then
1470	<	IBError(ibxeCantEndSharedTransaction, [nil]);
1471	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1472	<	SQLObjects[i].DoBeforeTransactionEnd;
1473	<	if InTransaction then
1474	<	begin
1475	<	if HandleIsShared then
1476	<	begin
1477	<	FHandle := nil;
1478	<	FHandleIsShared := False;
1479	<	status := 0;
1480	<	end
1481	<	else
1482	<	if (Action = TARollback) then
1483	<	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False)
1484	<	else
1485	<	status := Call(isc_commit_transaction(StatusVector, @FHandle), False);
1486	<	if ((Force) and (status > 0)) then
1487	<	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False);
1488	<	if Force then
1489	<	FHandle := nil
1490	<	else
1491	<	if (status > 0) then
1492	<	IBDataBaseError;
1493	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1494	<	SQLObjects[i].DoAfterTransactionEnd;
1495	<	end;
1496	<	end;
1497	<	TACommitRetaining:
1498	<	Call(isc_commit_retaining(StatusVector, @FHandle), True);
1499	<	TARollbackRetaining:
1500	<	Call(isc_rollback_retaining(StatusVector, @FHandle), True);
1501	<	end;
1502	<	if not (csDesigning in ComponentState) then
1503	<	begin
1504	<	case Action of
1505	<	TACommit:
1506	<	MonitorHook.TRCommit(Self);
1507	<	TARollback:
1508	<	MonitorHook.TRRollback(Self);
1509	<	TACommitRetaining:
1510	<	MonitorHook.TRCommitRetaining(Self);
1511	<	TARollbackRetaining:
1512	<	MonitorHook.TRRollbackRetaining(Self);
1513	<	end;
1514	<	end;
1515	<	finally
1516	<	FInEndTransaction := false
1517	<	end;
1518	<	end;
1519	<
1520	<	function TIBTransaction.GetDatabase(Index: Integer): TIBDatabase;
1521	<	begin
1522	<	result := FDatabases[Index];
1523	<	end;
1524	<
1525	<	function TIBTransaction.GetDatabaseCount: Integer;
1526	<	var
1527	<	i, Cnt: Integer;
1528	<	begin
1529	<	result := 0;
1530	<	Cnt := FDatabases.Count - 1;
1531	<	for i := 0 to Cnt do if FDatabases[i] <> nil then
1532	<	Inc(result);
1533	<	end;
1534	<
1535	<	function TIBTransaction.GetSQLObject(Index: Integer): TIBBase;
1536	<	begin
1537	<	result := FSQLObjects[Index];
1538	<	end;
1539	<
1540	<	function TIBTransaction.GetSQLObjectCount: Integer;
1541	<	var
1542	<	i, Cnt: Integer;
1543	<	begin
1544	<	result := 0;
1545	<	Cnt := FSQLObjects.Count - 1;
1546	<	for i := 0 to Cnt do if FSQLObjects[i] <> nil then
1547	<	Inc(result);
1548	<	end;
1549	<
1550	<	function TIBTransaction.GetInTransaction: Boolean;
1551	<	begin
1552	<	result := (FHandle <> nil);
1553	<	end;
1554	<
1555	<	function TIBTransaction.FindDatabase(db: TIBDatabase): Integer;
1556	<	var
1557	<	i: Integer;
1558	<	begin
1559	<	result := -1;
1560	<	for i := 0 to FDatabases.Count - 1 do
1561	<	if db = TIBDatabase(FDatabases[i]) then
1562	<	begin
1563	<	result := i;
1564	<	break;
1565	<	end;
1566	<	end;
1567	<
1568	<	function TIBTransaction.FindDefaultDatabase: TIBDatabase;
1569	<	var
1570	<	i: Integer;
1571	<	begin
1572	<	result := FDefaultDatabase;
1573	<	if result = nil then
1574	<	begin
1575	<	for i := 0 to FDatabases.Count - 1 do
1576	<	if (TIBDatabase(FDatabases[i]) <> nil) and
1577	<	(TIBDatabase(FDatabases[i]).DefaultTransaction = self) then
1578	<	begin
1579	<	result := TIBDatabase(FDatabases[i]);
1580	<	break;
1581	<	end;
1582	<	end;
1583	<	end;
1584	<
1585	<
1586	<	function TIBTransaction.GetIdleTimer: Integer;
1587	<	begin
1588	<	result := FTimer.Interval;
1589	<	end;
1590	<
1591	<	procedure TIBTransaction.Loaded;
1592	<	begin
1593	<	inherited Loaded;
1594	<	end;
1595	<
1596	<	procedure TIBTransaction.BeforeDatabaseDisconnect(DB: TIBDatabase);
1597	<	begin
1598	<	if InTransaction then
1599	<	EndTransaction(FDefaultAction, True);
1600	<	end;
1601	<
1602	<	procedure TIBTransaction.RemoveDatabase(Idx: Integer);
1603	<	var
1604	<	DB: TIBDatabase;
1605	<	begin
1606	<	if ((Idx >= 0) and (FDatabases[Idx] <> nil)) then
1607	<	begin
1608	<	DB := Databases[Idx];
1609	<	FDatabases[Idx] := nil;
1610	<	DB.RemoveTransaction(DB.FindTransaction(Self));
1611	<	if DB = FDefaultDatabase then
1612	<	FDefaultDatabase := nil;
1613	<	end;
1614	<	end;
1615	<
1616	<	procedure TIBTransaction.RemoveDatabases;
1617	<	var
1618	<	i: Integer;
1619	<	begin
1620	<	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1621	<	RemoveDatabase(i);
1622	<	end;
1623	<
1624	<	procedure TIBTransaction.RemoveSQLObject(Idx: Integer);
1625	<	var
1626	<	ds: TIBBase;
1627	<	begin
1628	<	if ((Idx >= 0) and (FSQLObjects[Idx] <> nil)) then
1629	<	begin
1630	<	ds := SQLObjects[Idx];
1631	<	FSQLObjects[Idx] := nil;
1632	<	ds.Transaction := nil;
1633	<	end;
1634	<	end;
1635	<
1636	<	procedure TIBTransaction.RemoveSQLObjects;
1637	<	var
1638	<	i: Integer;
1639	<	begin
1640	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1641	<	RemoveSQLObject(i);
1642	<	end;
1643	<
1644	<	procedure TIBTransaction.Rollback;
1645	<	begin
1646	<	EndTransaction(TARollback, False);
1647	<	end;
1648	<
1649	<	procedure TIBTransaction.RollbackRetaining;
1650	<	begin
1651	<	EndTransaction(TARollbackRetaining, False);
1652	<	end;
1653	<
1654	<	procedure TIBTransaction.SetActive(Value: Boolean);
1655	<	begin
1656	<	if csReading in ComponentState then
1657	<	FStreamedActive := Value
1658	<	else
1659	<	if Value and not InTransaction then
1660	<	StartTransaction
1661	<	else
1662	<	if not Value and InTransaction then
1663	<	Rollback;
1664	<	end;
1665	<
1666	<	procedure TIBTransaction.SetDefaultAction(Value: TTransactionAction);
1667	<	begin
1668	<	(*  if (Value = taRollbackRetaining) and (GetIBClientVersion < 6) then
1669	<	IBError(ibxeIB60feature, [nil]);*)
1670	<	FDefaultAction := Value;
1671	<	end;
1672	<
1673	<	procedure TIBTransaction.SetDefaultDatabase(Value: TIBDatabase);
1674	<	var
1675	<	i: integer;
1676	<	begin
1677	<	if (FDefaultDatabase <> nil) and (FDefaultDatabase <> Value) then
1678	<	begin
1679	<	i := FDefaultDatabase.FindTransaction(self);
1680	<	if (i <> -1) then
1681	<	FDefaultDatabase.RemoveTransaction(i);
1682	<	end;
1683	<	if (Value <> nil) and (FDefaultDatabase <> Value) then
1684	<	begin
1685	<	Value.AddTransaction(Self);
1686	<	AddDatabase(Value);
1687	<	for i := 0 to FSQLObjects.Count - 1 do
1688	<	if (FSQLObjects[i] <> nil) and
1689	<	(TIBBase(FSQLObjects[i]).Database = nil) then
1690	<	SetOrdProp(TIBBase(FSQLObjects[i]).Owner, 'Database', Integer(Value));
1691	<	end;
1692	<	FDefaultDatabase := Value;
1693	<	end;
1694	<
1695	<	procedure TIBTransaction.SetHandle(Value: TISC_TR_HANDLE);
1696	<	begin
1697	<	if (HandleIsShared) then
1698	<	EndTransaction(DefaultAction, True)
1699	<	else
1700	<	CheckNotInTransaction;
1701	<	FHandle := Value;
1702	<	FHandleIsShared := (Value <> nil);
1703	<	end;
1704	<
1705	<	procedure TIBTransaction.Notification( AComponent: TComponent;
1706	<	Operation: TOperation);
1707	<	var
1708	<	i: Integer;
1709	<	begin
1710	<	inherited Notification( AComponent, Operation);
1711	<	if (Operation = opRemove) and (AComponent = FDefaultDatabase) then
1712	<	begin
1713	<	i := FindDatabase(FDefaultDatabase);
1714	<	if (i <> -1) then
1715	<	RemoveDatabase(i);
1716	<	FDefaultDatabase := nil;
1717	<	end;
1718	<	end;
1719	<
1720	<	procedure TIBTransaction.SetIdleTimer(Value: Integer);
1721	<	begin
1722	<	if Value < 0 then
1723	<	IBError(ibxeTimeoutNegative, [nil])
1724	<	else
1725	<	if (Value = 0) then
1726	<	begin
1727	<	FTimer.Enabled := False;
1728	<	FTimer.Interval := 0;
1729	<	end
1730	<	else
1731	<	if (Value > 0) then
1732	<	begin
1733	<	FTimer.Interval := Value;
1734	<	if not (csDesigning in ComponentState) then
1735	<	FTimer.Enabled := True;
1736	<	end;
1737	<	end;
1738	<
1739	<	procedure TIBTransaction.SetTRParams(Value: TStrings);
1740	<	begin
1741	<	FTRParams.Assign(Value);
1742	<	end;
1743	<
1744	<	procedure TIBTransaction.StartTransaction;
1745	<	var
1746	<	pteb: PISC_TEB_ARRAY;
1747	<	TPB: String;
1748	<	i: Integer;
1749	<	begin
1750	<	CheckNotInTransaction;
1751	<	CheckDatabasesInList;
1752	<	for i := 0 to FDatabases.Count - 1 do
1753	<	if  FDatabases[i] <> nil then
1754	<	begin
1755	<	with TIBDatabase(FDatabases[i]) do
1756	<	if not Connected then
1757	<	if FStreamedConnected then
1758	<	begin
1759	<	Open;
1760	<	FStreamedConnected := False;
1761	<	end
1762	<	else
1763	<	IBError(ibxeDatabaseClosed, [nil]);
1764	<	end;
1765	<	if FTRParamsChanged then
1766	<	begin
1767	<	FTRParamsChanged := False;
1768	<	GenerateTPB(FTRParams, TPB, FTPBLength);
1769	<	if FTPBLength > 0 then
1770	<	begin
1771	<	IBAlloc(FTPB, 0, FTPBLength);
1772	<	Move(TPB[1], FTPB[0], FTPBLength);
1773	<	end;
1774	<	end;
1775	<
1776	<	pteb := nil;
1777	<	IBAlloc(pteb, 0, DatabaseCount * SizeOf(TISC_TEB));
1778	<	try
1779	<	for i := 0 to DatabaseCount - 1 do if Databases[i] <> nil then
1780	<	begin
1781	<	pteb^[i].db_handle := @(Databases[i].Handle);
1782	<	pteb^[i].tpb_length := FTPBLength;
1783	<	pteb^[i].tpb_address := FTPB;
1784	<	end;
1785	<	if Call(isc_start_multiple(StatusVector, @FHandle,
1786	<	DatabaseCount, PISC_TEB(pteb)), False) > 0 then
1787	<	begin
1788	<	FHandle := nil;
1789	<	IBDataBaseError;
1790	<	end;
1791	<	if not (csDesigning in ComponentState) then
1792	<	MonitorHook.TRStart(Self);
1793	<	finally
1794	<	FreeMem(pteb);
1795	<	end;
1796	<	end;
1797	<
1798	<	procedure TIBTransaction.TimeoutTransaction(Sender: TObject);
1799	<	begin
1800	<	if InTransaction then
1801	<	begin
1802	<	if FCanTimeout then
1803	<	begin
1804	<	EndTransaction(FDefaultAction, True);
1805	<	if Assigned(FOnIdleTimer) then
1806	<	FOnIdleTimer(Self);
1807	<	end
1808	<	else
1809	<	FCanTimeout := True;
1810	<	end;
1811	<	end;
1812	<
1813	<	procedure TIBTransaction.TRParamsChange(Sender: TObject);
1814	<	begin
1815	<	FTRParamsChanged := True;
1816	<	end;
1817	<
1818	<	procedure TIBTransaction.TRParamsChanging(Sender: TObject);
1819	<	begin
1820	<	EnsureNotInTransaction;
1821	<	CheckNotInTransaction;
1822	<	end;
1823	<
1824	<	{ TIBBase }
1825	<	constructor TIBBase.Create(AOwner: TObject);
1826	<	begin
1827	<	FOwner := AOwner;
1828	<	end;
1829	<
1830	<	destructor TIBBase.Destroy;
1831	<	begin
1832	<	SetDatabase(nil);
1833	<	SetTransaction(nil);
1834	<	inherited Destroy;
1835	<	end;
1836	<
1837	<	procedure TIBBase.CheckDatabase;
1838	<	begin
1839	<	if (FDatabase = nil) then
1840	<	IBError(ibxeDatabaseNotAssigned, [nil]);
1841	<	FDatabase.CheckActive;
1842	<	end;
1843	<
1844	<	procedure TIBBase.CheckTransaction;
1845	<	begin
1846	<	if FTransaction = nil then
1847	<	IBError(ibxeTransactionNotAssigned, [nil]);
1848	<	FTransaction.CheckInTransaction;
1849	<	end;
1850	<
1851	<	function TIBBase.GetDBHandle: PISC_DB_HANDLE;
1852	<	begin
1853	<	CheckDatabase;
1854	<	result := @FDatabase.Handle;
1855	<	end;
1856	<
1857	<	function TIBBase.GetTRHandle: PISC_TR_HANDLE;
1858	<	begin
1859	<	CheckTransaction;
1860	<	result := @FTransaction.Handle;
1861	<	end;
1862	<
1863	<	procedure TIBBase.DoAfterDatabaseConnect;
1864	<	begin
1865	<	if assigned(FAfterDatabaseConnect) then
1866	<	AfterDatabaseConnect(self);
1867	<	end;
1868	<
1869	<	procedure TIBBase.DoBeforeDatabaseDisconnect;
1870	<	begin
1871	<	if Assigned(BeforeDatabaseDisconnect) then
1872	<	BeforeDatabaseDisconnect(Self);
1873	<	end;
1874	<
1875	<	procedure TIBBase.DoAfterDatabaseDisconnect;
1876	<	begin
1877	<	if Assigned(AfterDatabaseDisconnect) then
1878	<	AfterDatabaseDisconnect(Self);
1879	<	end;
1880	<
1881	<	procedure TIBBase.DoDatabaseFree;
1882	<	begin
1883	<	if Assigned(OnDatabaseFree) then
1884	<	OnDatabaseFree(Self);
1885	<	SetDatabase(nil);
1886	<	SetTransaction(nil);
1887	<	end;
1888	<
1889	<	procedure TIBBase.DoBeforeTransactionEnd;
1890	<	begin
1891	<	if Assigned(BeforeTransactionEnd) then
1892	<	BeforeTransactionEnd(Self);
1893	<	end;
1894	<
1895	<	procedure TIBBase.DoAfterTransactionEnd;
1896	<	begin
1897	<	if Assigned(AfterTransactionEnd) then
1898	<	AfterTransactionEnd(Self);
1899	<	end;
1900	<
1901	<	procedure TIBBase.DoTransactionFree;
1902	<	begin
1903	<	if Assigned(OnTransactionFree) then
1904	<	OnTransactionFree(Self);
1905	<	FTransaction := nil;
1906	<	end;
1907	<
1908	<	procedure TIBBase.SetDatabase(Value: TIBDatabase);
1909	<	begin
1910	<	if (FDatabase <> nil) then
1911	<	FDatabase.RemoveSQLObject(FIndexInDatabase);
1912	<	FDatabase := Value;
1913	<	if (FDatabase <> nil) then
1914	<	begin
1915	<	FIndexInDatabase := FDatabase.AddSQLObject(Self);
1916	<	if (FTransaction = nil) then
1917	<	Transaction := FDatabase.FindDefaultTransaction;
1918	<	end;
1919	<	end;
1920	<
1921	<	procedure TIBBase.SetTransaction(Value: TIBTransaction);
1922	<	begin
1923	<	if (FTransaction <> nil) then
1924	<	FTransaction.RemoveSQLObject(FIndexInTransaction);
1925	<	FTransaction := Value;
1926	<	if (FTransaction <> nil) then
1927	<	begin
1928	<	FIndexInTransaction := FTransaction.AddSQLObject(Self);
1929	<	if (FDatabase = nil) then
1930	<	Database := FTransaction.FindDefaultDatabase;
1931	<	end;
1932	<	end;
1933	<
1934	<	{ GenerateDPB -
1935	<	Given a string containing a textual representation
1936	<	of the database parameters, generate a database
1937	<	parameter buffer, and return it and its length
1938	<	in DPB and DPBLength, respectively. }
1939	<
1940	<	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
1941	<	var
1942	<	i, j, pval: Integer;
1943	<	DPBVal: UShort;
1944	<	ParamName, ParamValue: string;
1945	<	begin
1946	<	{ The DPB is initially empty, with the exception that
1947	<	the DPB version must be the first byte of the string. }
1948	<	DPBLength := 1;
1949	<	DPB := Char(isc_dpb_version1);
1950	<
1951	<	{Iterate through the textual database parameters, constructing
1952	<	a DPB on-the-fly }
1953	<	for i := 0 to sl.Count - 1 do
1954	<	begin
1955	<	{ Get the parameter's name and value from the list,
1956	<	and make sure that the name is all lowercase with
1957	<	no leading 'isc_dpb_' prefix
1958	<	}
1959	<	if (Trim(sl.Names[i]) = '') then
1960	<	continue;
1961	<	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
1962	<	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
1963	<	if (Pos(DPBPrefix, ParamName) = 1) then {mbcs ok}
1964	<	Delete(ParamName, 1, Length(DPBPrefix));
1965	<	{ We want to translate the parameter name to some Integer
1966	<	value. We do this by scanning through a list of known
1967	<	database parameter names (DPBConstantNames, defined above) }
1968	<	DPBVal := 0;
1969	<	{ Find the parameter }
1970	<	for j := 1 to isc_dpb_last_dpb_constant do
1971	<	if (ParamName = DPBConstantNames[j]) then
1972	<	begin
1973	<	DPBVal := j;
1974	<	break;
1975	<	end;
1976	<	{  A database parameter either contains a string value (case 1)
1977	<	or an Integer value (case 2)
1978	<	or no value at all (case 3)
1979	<	or an error needs to be generated (case else)  }
1980	<	case DPBVal of
1981	<	isc_dpb_user_name, isc_dpb_password, isc_dpb_password_enc,
1982	<	isc_dpb_sys_user_name, isc_dpb_license, isc_dpb_encrypt_key,
1983	<	isc_dpb_lc_messages, isc_dpb_lc_ctype,
1984	<	isc_dpb_sql_role_name, isc_dpb_sql_dialect:
1985	<	begin
1986	<	if DPBVal = isc_dpb_sql_dialect then
1987	<	ParamValue[1] := Char(Ord(ParamValue[1]) - 48);
1988	<	DPB := DPB +
1989	<	Char(DPBVal) +
1990	<	Char(Length(ParamValue)) +
1991	<	ParamValue;
1992	<	Inc(DPBLength, 2 + Length(ParamValue));
1993	<	end;
1994	<	isc_dpb_num_buffers, isc_dpb_dbkey_scope, isc_dpb_force_write,
1995	<	isc_dpb_no_reserve, isc_dpb_damaged, isc_dpb_verify:
1996	<	begin
1997	<	DPB := DPB +
1998	<	Char(DPBVal) +
1999	<	#1 +
2000	<	Char(StrToInt(ParamValue));
2001	<	Inc(DPBLength, 3);
2002	<	end;
2003	<	isc_dpb_sweep:
2004	<	begin
2005	<	DPB := DPB +
2006	<	Char(DPBVal) +
2007	<	#1 +
2008	<	Char(isc_dpb_records);
2009	<	Inc(DPBLength, 3);
2010	<	end;
2011	<	isc_dpb_sweep_interval:
2012	<	begin
2013	<	pval := StrToInt(ParamValue);
2014	<	DPB := DPB +
2015	<	Char(DPBVal) +
2016	<	#4 +
2017	<	PChar(@pval)[0] +
2018	<	PChar(@pval)[1] +
2019	<	PChar(@pval)[2] +
2020	<	PChar(@pval)[3];
2021	<	Inc(DPBLength, 6);
2022	<	end;
2023	<	isc_dpb_activate_shadow, isc_dpb_delete_shadow, isc_dpb_begin_log,
2024	<	isc_dpb_quit_log:
2025	<	begin
2026	<	DPB := DPB +
2027	<	Char(DPBVal) +
2028	<	#1 + #0;
2029	<	Inc(DPBLength, 3);
2030	<	end;
2031	<	else
2032	<	begin
2033	<	if (DPBVal > 0) and
2034	<	(DPBVal <= isc_dpb_last_dpb_constant) then
2035	<	IBError(ibxeDPBConstantNotSupported, [DPBConstantNames[DPBVal]])
2036	<	else
2037	<	IBError(ibxeDPBConstantUnknownEx, [sl.Names[i]]);
2038	<	end;
2039	<	end;
2040	<	end;
2041	<	end;
2042	<
2043	<	{ GenerateTPB -
2044	<	Given a string containing a textual representation
2045	<	of the transaction parameters, generate a transaction
2046	<	parameter buffer, and return it and its length in
2047	<	TPB and TPBLength, respectively. }
2048	<	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
2049	<	var
2050	<	i, j, TPBVal, ParamLength: Integer;
2051	<	ParamName, ParamValue: string;
2052	<	begin
2053	<	TPB := '';
2054	<	if (sl.Count = 0) then
2055	<	TPBLength := 0
2056	<	else
2057	<	begin
2058	<	TPBLength := sl.Count + 1;
2059	<	TPB := TPB + Char(isc_tpb_version3);
2060	<	end;
2061	<	for i := 0 to sl.Count - 1 do
2062	<	begin
2063	<	if (Trim(sl[i]) =  '') then
2064	<	begin
2065	<	Dec(TPBLength);
2066	<	Continue;
2067	<	end;
2068	<	if (Pos('=', sl[i]) = 0) then {mbcs ok}
2069	<	ParamName := LowerCase(sl[i]) {mbcs ok}
2070	<	else
2071	<	begin
2072	<	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
2073	<	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
2074	<	end;
2075	<	if (Pos(TPBPrefix, ParamName) = 1) then {mbcs ok}
2076	<	Delete(ParamName, 1, Length(TPBPrefix));
2077	<	TPBVal := 0;
2078	<	{ Find the parameter }
2079	<	for j := 1 to isc_tpb_last_tpb_constant do
2080	<	if (ParamName = TPBConstantNames[j]) then
2081	<	begin
2082	<	TPBVal := j;
2083	<	break;
2084	<	end;
2085	<	{ Now act on it }
2086	<	case TPBVal of
2087	<	isc_tpb_consistency, isc_tpb_exclusive, isc_tpb_protected,
2088	<	isc_tpb_concurrency, isc_tpb_shared, isc_tpb_wait, isc_tpb_nowait,
2089	<	isc_tpb_read, isc_tpb_write, isc_tpb_ignore_limbo,
2090	<	isc_tpb_read_committed, isc_tpb_rec_version, isc_tpb_no_rec_version:
2091	<	TPB := TPB + Char(TPBVal);
2092	<	isc_tpb_lock_read, isc_tpb_lock_write:
2093	<	begin
2094	<	TPB := TPB + Char(TPBVal);
2095	<	{ Now set the string parameter }
2096	<	ParamLength := Length(ParamValue);
2097	<	Inc(TPBLength, ParamLength + 1);
2098	<	TPB := TPB + Char(ParamLength) + ParamValue;
2099	<	end;
2100	<	else
2101	<	begin
2102	<	if (TPBVal > 0) and
2103	<	(TPBVal <= isc_tpb_last_tpb_constant) then
2104	<	IBError(ibxeTPBConstantNotSupported, [TPBConstantNames[TPBVal]])
2105	<	else
2106	<	IBError(ibxeTPBConstantUnknownEx, [sl.Names[i]]);
2107	<	end;
2108	<	end;
2109	<	end;
2110	<	end;
2111	<
2112	<	end.
2113	<
2114	<
2115	<
2116	<
2117	<
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 ReadState(Reader: TReader); override;
219	>	procedure SetConnected (Value : boolean); override;
220	>	public
221	>	constructor Create(AOwner: TComponent); override;
222	>	destructor Destroy; override;
223	>	procedure ApplyUpdates(const DataSets: array of TDataSet);
224	>	procedure CloseDataSets;
225	>	procedure CheckActive;
226	>	procedure CheckInactive;
227	>	procedure CreateDatabase;
228	>	procedure DropDatabase;
229	>	procedure ForceClose;
230	>	procedure GetFieldNames(const TableName: string; List: TStrings);
231	>	procedure GetTableNames(List: TStrings; SystemTables: Boolean = False);
232	>	function IndexOfDBConst(st: String): Integer;
233	>	function TestConnected: Boolean;
234	>	procedure CheckDatabaseName;
235	>	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
236	>	function AddTransaction(TR: TIBTransaction): Integer;
237	>	function FindTransaction(TR: TIBTransaction): Integer;
238	>	function FindDefaultTransaction(): TIBTransaction;
239	>	procedure RemoveTransaction(Idx: Integer);
240	>	procedure RemoveTransactions;
241	>	procedure SetHandle(Value: TISC_DB_HANDLE);
242	>
243	>	property Handle: TISC_DB_HANDLE read FHandle;
244	>	property IsReadOnly: Boolean read GetIsReadOnly;
245	>	property DBParamByDPB[const Idx: Integer]: String read GetDBParamByDPB
246	>	write SetDBParamByDPB;
247	>	property SQLObjectCount: Integer read GetSQLObjectCount;
248	>	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
249	>	property HandleIsShared: Boolean read FHandleIsShared;
250	>	property TransactionCount: Integer read GetTransactionCount;
251	>	property Transactions[Index: Integer]: TIBTransaction read GetTransaction;
252	>	property InternalTransaction: TIBTransaction read FInternalTransaction;
253	>
254	>	published
255	>	property Connected;
256	>	property AllowStreamedConnected: boolean read FAllowStreamedConnected
257	>	write FAllowStreamedConnected;
258	>	property DatabaseName: TIBFileName read FDBName write SetDatabaseName;
259	>	property Params: TStrings read FDBParams write SetDBParams;
260	>	property LoginPrompt default True;
261	>	property DefaultTransaction: TIBTransaction read FDefaultTransaction
262	>	write SetDefaultTransaction;
263	>	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer;
264	>	property SQLDialect : Integer read GetSQLDialect write SetSQLDialect default 3;
265	>	property DBSQLDialect : Integer read FDBSQLDialect;
266	>	property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
267	>	property AfterConnect;
268	>	property AfterDisconnect;
269	>	property BeforeConnect;
270	>	property BeforeDisconnect;
271	>	property OnLogin: TIBDatabaseLoginEvent read FOnLogin write FOnLogin;
272	>	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
273	>	property OnDialectDowngradeWarning: TNotifyEvent read FOnDialectDowngradeWarning write FOnDialectDowngradeWarning;
274	>	end;
275	>
276	>	{ TIBTransaction }
277	>
278	>	TTransactionAction         = (TARollback, TACommit, TARollbackRetaining, TACommitRetaining);
279	>
280	>	TIBTransaction = class(TComponent)
281	>	private
282	>	FIBLoaded: Boolean;
283	>	FCanTimeout         : Boolean;
284	>	FDatabases          : TList;
285	>	FSQLObjects         : TList;
286	>	FDefaultDatabase    : TIBDatabase;
287	>	FHandle             : TISC_TR_HANDLE;
288	>	FHandleIsShared     : Boolean;
289	>	FOnIdleTimer          : TNotifyEvent;
290	>	FStreamedActive     : Boolean;
291	>	FTPB                : PChar;
292	>	FTPBLength          : Short;
293	>	FTimer              : TTimer;
294	>	FDefaultAction      : TTransactionAction;
295	>	FTRParams           : TStrings;
296	>	FTRParamsChanged    : Boolean;
297	>	FInEndTransaction   : boolean;
298	>	procedure EnsureNotInTransaction;
299	>	procedure EndTransaction(Action: TTransactionAction; Force: Boolean);
300	>	function GetDatabase(Index: Integer): TIBDatabase;
301	>	function GetDatabaseCount: Integer;
302	>	function GetSQLObject(Index: Integer): TIBBase;
303	>	function GetSQLObjectCount: Integer;
304	>	function GetInTransaction: Boolean;
305	>	function GetIdleTimer: Integer;
306	>	procedure BeforeDatabaseDisconnect(DB: TIBDatabase);
307	>	procedure SetActive(Value: Boolean);
308	>	procedure SetDefaultAction(Value: TTransactionAction);
309	>	procedure SetDefaultDatabase(Value: TIBDatabase);
310	>	procedure SetIdleTimer(Value: Integer);
311	>	procedure SetTRParams(Value: TStrings);
312	>	procedure TimeoutTransaction(Sender: TObject);
313	>	procedure TRParamsChange(Sender: TObject);
314	>	procedure TRParamsChanging(Sender: TObject);
315	>	function AddSQLObject(ds: TIBBase): Integer;
316	>	procedure RemoveSQLObject(Idx: Integer);
317	>	procedure RemoveSQLObjects;
318	>
319	>	protected
320	>	procedure Loaded; override;
321	>	procedure SetHandle(Value: TISC_TR_HANDLE);
322	>	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
323	>
324	>	public
325	>	constructor Create(AOwner: TComponent); override;
326	>	destructor Destroy; override;
327	>	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
328	>	procedure Commit;
329	>	procedure CommitRetaining;
330	>	procedure Rollback;
331	>	procedure RollbackRetaining;
332	>	procedure StartTransaction;
333	>	procedure CheckInTransaction;
334	>	procedure CheckNotInTransaction;
335	>
336	>	function AddDatabase(db: TIBDatabase): Integer;
337	>	function FindDatabase(db: TIBDatabase): Integer;
338	>	function FindDefaultDatabase: TIBDatabase;
339	>	procedure RemoveDatabase(Idx: Integer);
340	>	procedure RemoveDatabases;
341	>	procedure CheckDatabasesInList;
342	>
343	>	property DatabaseCount: Integer read GetDatabaseCount;
344	>	property Databases[Index: Integer]: TIBDatabase read GetDatabase;
345	>	property SQLObjectCount: Integer read GetSQLObjectCount;
346	>	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
347	>	property Handle: TISC_TR_HANDLE read FHandle;
348	>	property HandleIsShared: Boolean read FHandleIsShared;
349	>	property InTransaction: Boolean read GetInTransaction;
350	>	property TPB: PChar read FTPB;
351	>	property TPBLength: Short read FTPBLength;
352	>	published
353	>	property Active: Boolean read GetInTransaction write SetActive;
354	>	property DefaultDatabase: TIBDatabase read FDefaultDatabase
355	>	write SetDefaultDatabase;
356	>	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer default 0;
357	>	property DefaultAction: TTransactionAction read FDefaultAction write SetDefaultAction default taCommit;
358	>	property Params: TStrings read FTRParams write SetTRParams;
359	>	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
360	>	end;
361	>
362	>	{ TIBBase }
363	>
364	>	{ Virtually all components in IB are "descendents" of TIBBase.
365	>	It is to more easily manage the database and transaction
366	>	connections. }
367	>	TIBBase = class(TObject)
368	>	protected
369	>	FDatabase: TIBDatabase;
370	>	FIndexInDatabase: Integer;
371	>	FTransaction: TIBTransaction;
372	>	FIndexInTransaction: Integer;
373	>	FOwner: TObject;
374	>	FBeforeDatabaseDisconnect: TNotifyEvent;
375	>	FAfterDatabaseDisconnect: TNotifyEvent;
376	>	FAfterDatabaseConnect: TNotifyEvent;
377	>	FOnDatabaseFree: TNotifyEvent;
378	>	FBeforeTransactionEnd: TNotifyEvent;
379	>	FAfterTransactionEnd: TNotifyEvent;
380	>	FOnTransactionFree: TNotifyEvent;
381	>
382	>	procedure DoAfterDatabaseConnect; virtual;
383	>	procedure DoBeforeDatabaseDisconnect; virtual;
384	>	procedure DoAfterDatabaseDisconnect; virtual;
385	>	procedure DoDatabaseFree; virtual;
386	>	procedure DoBeforeTransactionEnd; virtual;
387	>	procedure DoAfterTransactionEnd; virtual;
388	>	procedure DoTransactionFree; virtual;
389	>	function GetDBHandle: PISC_DB_HANDLE; virtual;
390	>	function GetTRHandle: PISC_TR_HANDLE; virtual;
391	>	procedure SetDatabase(Value: TIBDatabase); virtual;
392	>	procedure SetTransaction(Value: TIBTransaction); virtual;
393	>	public
394	>	constructor Create(AOwner: TObject);
395	>	destructor Destroy; override;
396	>	procedure CheckDatabase; virtual;
397	>	procedure CheckTransaction; virtual;
398	>	public
399	>	property AfterDatabaseConnect: TNotifyEvent read FAfterDatabaseConnect
400	>	write FAfterDatabaseConnect;
401	>	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
402	>	write FBeforeDatabaseDisconnect;
403	>	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
404	>	write FAfterDatabaseDisconnect;
405	>	property OnDatabaseFree: TNotifyEvent read FOnDatabaseFree write FOnDatabaseFree;
406	>	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd write FBeforeTransactionEnd;
407	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd write FAfterTransactionEnd;
408	>	property OnTransactionFree: TNotifyEvent read FOnTransactionFree write FOnTransactionFree;
409	>	property Database: TIBDatabase read FDatabase
410	>	write SetDatabase;
411	>	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
412	>	property Owner: TObject read FOwner;
413	>	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
414	>	property Transaction: TIBTransaction read FTransaction
415	>	write SetTransaction;
416	>	end;
417	>
418	>	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
419	>	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
420	>
421	>
422	>	implementation
423	>
424	>	uses IBIntf, IBSQLMonitor, IBCustomDataSet, IBDatabaseInfo, IBSQL, IBUtils,
425	>	typInfo;
426	>
427	>	{ TIBDatabase }
428	>
429	>	constructor TIBDatabase.Create(AOwner: TComponent);
430	>	{$ifdef WINDOWS}
431	>	var acp: uint;
432	>	{$endif}
433	>	begin
434	>	inherited Create(AOwner);
435	>	FIBLoaded := False;
436	>	CheckIBLoaded;
437	>	FIBLoaded := True;
438	>	LoginPrompt := True;
439	>	FSQLObjects := TList.Create;
440	>	FTransactions := TList.Create;
441	>	FDBName := '';
442	>	FDBParams := TStringList.Create;
443	>	{$ifdef UNIX}
444	>	if csDesigning in ComponentState then
445	>	FDBParams.Add('lc_ctype=UTF-8');
446	>	{$else}
447	>	{$ifdef WINDOWS}
448	>	if csDesigning in ComponentState then
449	>	begin
450	>	acp := GetACP;
451	>	if (acp >= 1250) and (acp <= 1254) then
452	>	FDBParams.Values['lc_ctype'] := Format('WIN%d',[acp]);
453	>	end;
454	>	{$endif}
455	>	{$endif}
456	>	FDBParamsChanged := True;
457	>	TStringList(FDBParams).OnChange := DBParamsChange;
458	>	TStringList(FDBParams).OnChanging := DBParamsChanging;
459	>	FDPB := nil;
460	>	FHandle := nil;
461	>	FUserNames := nil;
462	>	FInternalTransaction := TIBTransaction.Create(self);
463	>	FInternalTransaction.DefaultDatabase := Self;
464	>	FTimer := TTimer.Create(Self);
465	>	FTimer.Enabled := False;
466	>	FTimer.Interval := 0;
467	>	FTimer.OnTimer := TimeoutConnection;
468	>	FDBSQLDialect := 1;
469	>	FSQLDialect := 3;
470	>	FTraceFlags := [];
471	>	FDataSets := TList.Create;
472	>	CheckStreamConnect;
473	>	end;
474	>
475	>	destructor TIBDatabase.Destroy;
476	>	var
477	>	i: Integer;
478	>	begin
479	>	if FIBLoaded then
480	>	begin
481	>	IdleTimer := 0;
482	>	if FHandle <> nil then
483	>	ForceClose;
484	>	for i := 0 to FSQLObjects.Count - 1 do
485	>	if FSQLObjects[i] <> nil then
486	>	SQLObjects[i].DoDatabaseFree;
487	>	RemoveSQLObjects;
488	>	RemoveTransactions;
489	>	FInternalTransaction.Free;
490	>	FreeMem(FDPB);
491	>	FDPB := nil;
492	>	FDBParams.Free;
493	>	FSQLObjects.Free;
494	>	FUserNames.Free;
495	>	FTransactions.Free;
496	>	end;
497	>	FDataSets.Free;
498	>	inherited Destroy;
499	>	end;
500	>
501	>	function TIBDatabase.Call(ErrCode: ISC_STATUS;
502	>	RaiseError: Boolean): ISC_STATUS;
503	>	begin
504	>	result := ErrCode;
505	>	FCanTimeout := False;
506	>	if RaiseError and (ErrCode > 0) then
507	>	IBDataBaseError;
508	>	end;
509	>
510	>	procedure TIBDatabase.CheckActive;
511	>	begin
512	>	if StreamedConnected and (not Connected) then
513	>	Loaded;
514	>	if FHandle = nil then
515	>	IBError(ibxeDatabaseClosed, [nil]);
516	>	end;
517	>
518	>	procedure TIBDatabase.EnsureInactive;
519	>	begin
520	>	if csDesigning in ComponentState then
521	>	begin
522	>	if FHandle <> nil then
523	>	Close;
524	>	end
525	>	end;
526	>
527	>	procedure TIBDatabase.CheckInactive;
528	>	begin
529	>	if FHandle <> nil then
530	>	IBError(ibxeDatabaseOpen, [nil]);
531	>	end;
532	>
533	>	procedure TIBDatabase.CheckDatabaseName;
534	>	begin
535	>	if (FDBName = '') then
536	>	IBError(ibxeDatabaseNameMissing, [nil]);
537	>	end;
538	>
539	>	function TIBDatabase.AddSQLObject(ds: TIBBase): Integer;
540	>	begin
541	>	result := 0;
542	>	if (ds.Owner is TIBCustomDataSet) then
543	>	FDataSets.Add(ds.Owner);
544	>	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
545	>	Inc(result);
546	>	if (result = FSQLObjects.Count) then
547	>	FSQLObjects.Add(ds)
548	>	else
549	>	FSQLObjects[result] := ds;
550	>	end;
551	>
552	>	function TIBDatabase.AddTransaction(TR: TIBTransaction): Integer;
553	>	begin
554	>	result := FindTransaction(TR);
555	>	if result <> -1 then
556	>	begin
557	>	result := -1;
558	>	exit;
559	>	end;
560	>	result := 0;
561	>	while (result < FTransactions.Count) and (FTransactions[result] <> nil) do
562	>	Inc(result);
563	>	if (result = FTransactions.Count) then
564	>	FTransactions.Add(TR)
565	>	else
566	>	FTransactions[result] := TR;
567	>	end;
568	>
569	>	procedure TIBDatabase.DoDisconnect;
570	>	begin
571	>	if Connected then
572	>	InternalClose(False);
573	>	FDBSQLDialect := 1;
574	>	end;
575	>
576	>	procedure TIBDatabase.CreateDatabase;
577	>	var
578	>	tr_handle: TISC_TR_HANDLE;
579	>	begin
580	>	CheckInactive;
581	>	tr_handle := nil;
582	>	Call(
583	>	isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0,
584	>	PChar('CREATE DATABASE ''' + FDBName + ''' ' + {do not localize}
585	>	Params.Text), SQLDialect, nil),
586	>	True);
587	>	end;
588	>
589	>	procedure TIBDatabase.DropDatabase;
590	>	begin
591	>	CheckActive;
592	>	Call(isc_drop_database(StatusVector, @FHandle), True);
593	>	end;
594	>
595	>	procedure TIBDatabase.DBParamsChange(Sender: TObject);
596	>	begin
597	>	FDBParamsChanged := True;
598	>	end;
599	>
600	>	procedure TIBDatabase.DBParamsChanging(Sender: TObject);
601	>	begin
602	>	EnsureInactive;
603	>	CheckInactive;
604	>	end;
605	>
606	>	function TIBDatabase.FindTransaction(TR: TIBTransaction): Integer;
607	>	var
608	>	i: Integer;
609	>	begin
610	>	result := -1;
611	>	for i := 0 to FTransactions.Count - 1 do
612	>	if TR = Transactions[i] then
613	>	begin
614	>	result := i;
615	>	break;
616	>	end;
617	>	end;
618	>
619	>	function TIBDatabase.FindDefaultTransaction(): TIBTransaction;
620	>	var
621	>	i: Integer;
622	>	begin
623	>	result := FDefaultTransaction;
624	>	if result = nil then
625	>	begin
626	>	for i := 0 to FTransactions.Count - 1 do
627	>	if (Transactions[i] <> nil) and
628	>	(TIBTransaction(Transactions[i]).DefaultDatabase = self) and
629	>	(TIBTransaction(Transactions[i]) <> FInternalTransaction) then
630	>	begin
631	>	result := TIBTransaction(Transactions[i]);
632	>	break;
633	>	end;
634	>	end;
635	>	end;
636	>
637	>	procedure TIBDatabase.ForceClose;
638	>	begin
639	>	if Connected then
640	>	InternalClose(True);
641	>	end;
642	>
643	>	function TIBDatabase.GetConnected: Boolean;
644	>	begin
645	>	result := FHandle <> nil;
646	>	end;
647	>
648	>	function TIBDatabase.GetSQLObject(Index: Integer): TIBBase;
649	>	begin
650	>	result := FSQLObjects[Index];
651	>	end;
652	>
653	>	function TIBDatabase.GetSQLObjectCount: Integer;
654	>	var
655	>	i: Integer;
656	>	begin
657	>	result := 0;
658	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
659	>	Inc(result);
660	>	end;
661	>
662	>	function TIBDatabase.GetDBParamByDPB(const Idx: Integer): String;
663	>	var
664	>	ConstIdx, EqualsIdx: Integer;
665	>	begin
666	>	if (Idx > 0) and (Idx <= isc_dpb_last_dpb_constant) then
667	>	begin
668	>	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
669	>	if ConstIdx = -1 then
670	>	result := ''
671	>	else
672	>	begin
673	>	result := Params[ConstIdx];
674	>	EqualsIdx := Pos('=', result); {mbcs ok}
675	>	if EqualsIdx = 0 then
676	>	result := ''
677	>	else
678	>	result := Copy(result, EqualsIdx + 1, Length(result));
679	>	end;
680	>	end
681	>	else
682	>	result := '';
683	>	end;
684	>
685	>	function TIBDatabase.GetIdleTimer: Integer;
686	>	begin
687	>	result := FTimer.Interval;
688	>	end;
689	>
690	>	function TIBDatabase.GetTransaction(Index: Integer): TIBTransaction;
691	>	begin
692	>	result := FTransactions[Index];
693	>	end;
694	>
695	>	function TIBDatabase.GetTransactionCount: Integer;
696	>	var
697	>	i: Integer;
698	>	begin
699	>	result := 0;
700	>	for i := 0 to FTransactions.Count - 1 do
701	>	if FTransactions[i] <> nil then
702	>	Inc(result);
703	>	end;
704	>
705	>	function TIBDatabase.IndexOfDBConst(st: String): Integer;
706	>	var
707	>	i, pos_of_str: Integer;
708	>	begin
709	>	result := -1;
710	>	for i := 0 to Params.Count - 1 do
711	>	begin
712	>	pos_of_str := Pos(st, AnsiLowerCase(Params[i])); {mbcs ok}
713	>	if (pos_of_str = 1) or (pos_of_str = Length(DPBPrefix) + 1) then
714	>	begin
715	>	result := i;
716	>	break;
717	>	end;
718	>	end;
719	>	end;
720	>
721	>	procedure TIBDatabase.InternalClose(Force: Boolean);
722	>	var
723	>	i: Integer;
724	>	begin
725	>	CheckActive;
726	>	{ Tell all connected transactions that we're disconnecting.
727	>	This is so transactions can commit/rollback, accordingly
728	>	}
729	>	for i := 0 to FTransactions.Count - 1 do
730	>	begin
731	>	try
732	>	if FTransactions[i] <> nil then
733	>	Transactions[i].BeforeDatabaseDisconnect(Self);
734	>	except
735	>	if not Force then
736	>	raise;
737	>	end;
738	>	end;
739	>	for i := 0 to FSQLObjects.Count - 1 do
740	>	begin
741	>	try
742	>	if FSQLObjects[i] <> nil then
743	>	SQLObjects[i].DoBeforeDatabaseDisconnect;
744	>	except
745	>	if not Force then
746	>	raise;
747	>	end;
748	>	end;
749	>
750	>	if (not HandleIsShared) and
751	>	(Call(isc_detach_database(StatusVector, @FHandle), False) > 0) and
752	>	(not Force) then
753	>	IBDataBaseError
754	>	else
755	>	begin
756	>	FHandle := nil;
757	>	FHandleIsShared := False;
758	>	end;
759	>
760	>	if not (csDesigning in ComponentState) then
761	>	MonitorHook.DBDisconnect(Self);
762	>
763	>	for i := 0 to FSQLObjects.Count - 1 do
764	>	if FSQLObjects[i] <> nil then
765	>	SQLObjects[i].DoAfterDatabaseDisconnect;
766	>	end;
767	>
768	>	procedure TIBDataBase.CheckStreamConnect;
769	>	var
770	>	i: integer;
771	>	begin
772	>	try
773	>	if not (csDesigning in ComponentState) and StreamedConnected and (not Connected) then
774	>	begin
775	>	for i := 0 to FTransactions.Count - 1 do
776	>	if  FTransactions[i] <> nil then
777	>	begin
778	>	with TIBTransaction(FTransactions[i]) do
779	>	if not Active then
780	>	if FStreamedActive and not InTransaction then
781	>	begin
782	>	StartTransaction;
783	>	FStreamedActive := False;
784	>	end;
785	>	end;
786	>	if (FDefaultTransaction <> nil) and
787	>	(FDefaultTransaction.FStreamedActive) and
788	>	(not FDefaultTransaction.InTransaction) then
789	>	FDefaultTransaction.StartTransaction;
790	>	FStreamedConnected := False;
791	>	end;
792	>	except
793	>	if csDesigning in ComponentState then
794	>	Application.HandleException(Self)
795	>	else
796	>	raise;
797	>	end;
798	>	end;
799	>
800	>	procedure TIBDatabase.Notification( AComponent: TComponent;
801	>	Operation: TOperation);
802	>	var
803	>	i: Integer;
804	>	begin
805	>	inherited Notification( AComponent, Operation);
806	>	if (Operation = opRemove) and (AComponent = FDefaultTransaction) then
807	>	begin
808	>	i := FindTransaction(FDefaultTransaction);
809	>	if (i <> -1) then
810	>	RemoveTransaction(i);
811	>	FDefaultTransaction := nil;
812	>	end;
813	>	end;
814	>
815	>	function TIBDatabase.Login: Boolean;
816	>	var
817	>	IndexOfUser, IndexOfPassword: Integer;
818	>	Username, Password, OldPassword: String;
819	>	LoginParams: TStrings;
820	>
821	>	procedure HidePassword;
822	>	var
823	>	I: Integer;
824	>	IndexAt: Integer;
825	>	begin
826	>	IndexAt := 0;
827	>	for I := 0 to Params.Count -1 do
828	>	if Pos('password', LowerCase(Trim(Params.Names[i]))) = 1 then {mbcs ok}
829	>	begin
830	>	FHiddenPassword := Params.Values[Params.Names[i]];
831	>	IndexAt := I;
832	>	break;
833	>	end;
834	>	if IndexAt <> 0 then
835	>	Params.Delete(IndexAt);
836	>	end;
837	>
838	>	begin
839	>	Result := false;
840	>	if FLoginCalled then Exit;
841	>	FLoginCalled := true;
842	>	try
843	>	if Assigned(FOnLogin) and not (csDesigning in ComponentState) then
844	>	begin
845	>	result := True;
846	>	LoginParams := TStringList.Create;
847	>	try
848	>	LoginParams.Assign(Params);
849	>	FOnLogin(Self, LoginParams);
850	>	Params.Assign (LoginParams);
851	>	HidePassword;
852	>	finally
853	>	LoginParams.Free;
854	>	end;
855	>	end
856	>	else
857	>	begin
858	>	IndexOfUser := IndexOfDBConst(DPBConstantNames[isc_dpb_user_name]);
859	>	if IndexOfUser <> -1 then
860	>	Username := Copy(Params[IndexOfUser],
861	>	Pos('=', Params[IndexOfUser]) + 1, {mbcs ok}
862	>	Length(Params[IndexOfUser]));
863	>	IndexOfPassword := IndexOfDBConst(DPBConstantNames[isc_dpb_password]);
864	>	if IndexOfPassword <> -1 then
865	>	begin
866	>	Password := Copy(Params[IndexOfPassword],
867	>	Pos('=', Params[IndexOfPassword]) + 1, {mbcs ok}
868	>	Length(Params[IndexOfPassword]));
869	>	OldPassword := password;
870	>	end;
871	>	result := LoginDialogEx(DatabaseName, Username, Password, False);
872	>	if result then
873	>	begin
874	>	if IndexOfUser = -1 then
875	>	Params.Add(DPBConstantNames[isc_dpb_user_name] + '=' + Username)
876	>	else
877	>	Params[IndexOfUser] := DPBConstantNames[isc_dpb_user_name] +
878	>	'=' + Username;
879	>	if (Password = OldPassword) then
880	>	FHiddenPassword := ''
881	>	else
882	>	begin
883	>	FHiddenPassword := Password;
884	>	if OldPassword <> '' then
885	>	HidePassword;
886	>	end;
887	>	end;
888	>	end;
889	>	finally
890	>	FLoginCalled := false
891	>	end;
892	>	end;
893	>
894	>	procedure TIBDatabase.DoConnect;
895	>	var
896	>	DPB: String;
897	>	TempDBParams: TStrings;
898	>	I: integer;
899	>
900	>	begin
901	>	CheckInactive;
902	>	CheckDatabaseName;
903	>	if (not LoginPrompt) and (FHiddenPassword <> '') then
904	>	begin
905	>	FHiddenPassword := '';
906	>	FDBParamsChanged := True;
907	>	end;
908	>	{ Use builtin login prompt if requested }
909	>	if (LoginPrompt or (csDesigning in ComponentState)) and not Login then
910	>	IBError(ibxeOperationCancelled, [nil]);
911	>	{ Generate a new DPB if necessary }
912	>	if (FDBParamsChanged) then
913	>	begin
914	>	FDBParamsChanged := False;
915	>	if (not LoginPrompt and not (csDesigning in ComponentState)) or (FHiddenPassword = '') then
916	>	GenerateDPB(FDBParams, DPB, FDPBLength)
917	>	else
918	>	begin
919	>	TempDBParams := TStringList.Create;
920	>	try
921	>	TempDBParams.Assign(FDBParams);
922	>	TempDBParams.Add('password=' + FHiddenPassword);
923	>	GenerateDPB(TempDBParams, DPB, FDPBLength);
924	>	finally
925	>	TempDBParams.Free;
926	>	end;
927	>	end;
928	>	IBAlloc(FDPB, 0, FDPBLength);
929	>	Move(DPB[1], FDPB[0], FDPBLength);
930	>	end;
931	>	if Call(isc_attach_database(StatusVector, Length(FDBName),
932	>	PChar(FDBName), @FHandle,
933	>	FDPBLength, FDPB), False) > 0 then
934	>	begin
935	>	FHandle := nil;
936	>	IBDataBaseError;
937	>	end;
938	>	FDBSQLDialect := GetDBSQLDialect;
939	>	ValidateClientSQLDialect;
940	>	for i := 0 to FSQLObjects.Count - 1 do
941	>	begin
942	>	if FSQLObjects[i] <> nil then
943	>	SQLObjects[i].DoAfterDatabaseConnect;
944	>	end;
945	>	if not (csDesigning in ComponentState) then
946	>	MonitorHook.DBConnect(Self);
947	>	end;
948	>
949	>	procedure TIBDatabase.RemoveSQLObject(Idx: Integer);
950	>	var
951	>	ds: TIBBase;
952	>	begin
953	>	if (Idx >= 0) and (FSQLObjects[Idx] <> nil) then
954	>	begin
955	>	ds := SQLObjects[Idx];
956	>	FSQLObjects[Idx] := nil;
957	>	ds.Database := nil;
958	>	if (ds.owner is TDataSet) then
959	>	FDataSets.Remove(TDataSet(ds.Owner));
960	>	end;
961	>	end;
962	>
963	>	procedure TIBDatabase.RemoveSQLObjects;
964	>	var
965	>	i: Integer;
966	>	begin
967	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
968	>	begin
969	>	RemoveSQLObject(i);
970	>	if (TIBBase(FSQLObjects[i]).owner is TDataSet) then
971	>	FDataSets.Remove(TDataSet(TIBBase(FSQLObjects[i]).owner));
972	>	end;
973	>	end;
974	>
975	>	procedure TIBDatabase.RemoveTransaction(Idx: Integer);
976	>	var
977	>	TR: TIBTransaction;
978	>	begin
979	>	if ((Idx >= 0) and (FTransactions[Idx] <> nil)) then
980	>	begin
981	>	TR := Transactions[Idx];
982	>	FTransactions[Idx] := nil;
983	>	TR.RemoveDatabase(TR.FindDatabase(Self));
984	>	if TR = FDefaultTransaction then
985	>	FDefaultTransaction := nil;
986	>	end;
987	>	end;
988	>
989	>	procedure TIBDatabase.RemoveTransactions;
990	>	var
991	>	i: Integer;
992	>	begin
993	>	for i := 0 to FTransactions.Count - 1 do if FTransactions[i] <> nil then
994	>	RemoveTransaction(i);
995	>	end;
996	>
997	>	procedure TIBDatabase.SetDatabaseName(const Value: TIBFileName);
998	>	begin
999	>	if FDBName <> Value then
1000	>	begin
1001	>	EnsureInactive;
1002	>	CheckInactive;
1003	>	FDBName := Value;
1004	>	end;
1005	>	end;
1006	>
1007	>	procedure TIBDatabase.SetDBParamByDPB(const Idx: Integer; Value: String);
1008	>	var
1009	>	ConstIdx: Integer;
1010	>	begin
1011	>	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
1012	>	if (Value = '') then
1013	>	begin
1014	>	if ConstIdx <> -1 then
1015	>	Params.Delete(ConstIdx);
1016	>	end
1017	>	else
1018	>	begin
1019	>	if (ConstIdx = -1) then
1020	>	Params.Add(DPBConstantNames[Idx] + '=' + Value)
1021	>	else
1022	>	Params[ConstIdx] := DPBConstantNames[Idx] + '=' + Value;
1023	>	end;
1024	>	end;
1025	>
1026	>	procedure TIBDatabase.SetDBParams(Value: TStrings);
1027	>	begin
1028	>	FDBParams.Assign(Value);
1029	>	end;
1030	>
1031	>	procedure TIBDatabase.SetDefaultTransaction(Value: TIBTransaction);
1032	>	var
1033	>	i: Integer;
1034	>	begin
1035	>	if (FDefaultTransaction <> nil) and (FDefaultTransaction <> Value) then
1036	>	begin
1037	>	i := FindTransaction(FDefaultTransaction);
1038	>	if (i <> -1) and (FDefaultTransaction.DefaultDatabase <> self) then
1039	>	RemoveTransaction(i);
1040	>	end;
1041	>	if (Value <> nil) and (FDefaultTransaction <> Value) then
1042	>	begin
1043	>	Value.AddDatabase(Self);
1044	>	AddTransaction(Value);
1045	>	end;
1046	>	FDefaultTransaction := Value;
1047	>	end;
1048	>
1049	>	procedure TIBDatabase.SetHandle(Value: TISC_DB_HANDLE);
1050	>	begin
1051	>	if HandleIsShared then
1052	>	Close
1053	>	else
1054	>	CheckInactive;
1055	>	FHandle := Value;
1056	>	FHandleIsShared := (Value <> nil);
1057	>	end;
1058	>
1059	>	procedure TIBDatabase.SetIdleTimer(Value: Integer);
1060	>	begin
1061	>	if Value < 0 then
1062	>	IBError(ibxeTimeoutNegative, [nil])
1063	>	else
1064	>	if (Value = 0) then
1065	>	begin
1066	>	FTimer.Enabled := False;
1067	>	FTimer.Interval := 0;
1068	>	end
1069	>	else
1070	>	if (Value > 0) then
1071	>	begin
1072	>	FTimer.Interval := Value;
1073	>	if not (csDesigning in ComponentState) then
1074	>	FTimer.Enabled := True;
1075	>	end;
1076	>	end;
1077	>
1078	>	function TIBDatabase.TestConnected: Boolean;
1079	>	var
1080	>	DatabaseInfo: TIBDatabaseInfo;
1081	>	begin
1082	>	result := Connected;
1083	>	if result then
1084	>	begin
1085	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1086	>	try
1087	>	DatabaseInfo.Database := self;
1088	>	{ poke the server to see if connected }
1089	>	if DatabaseInfo.BaseLevel = 0 then ;
1090	>	DatabaseInfo.Free;
1091	>	except
1092	>	ForceClose;
1093	>	result := False;
1094	>	DatabaseInfo.Free;
1095	>	end;
1096	>	end;
1097	>	end;
1098	>
1099	>	procedure TIBDatabase.TimeoutConnection(Sender: TObject);
1100	>	begin
1101	>	if Connected then
1102	>	begin
1103	>	if FCanTimeout then
1104	>	begin
1105	>	ForceClose;
1106	>	if Assigned(FOnIdleTimer) then
1107	>	FOnIdleTimer(Self);
1108	>	end
1109	>	else
1110	>	FCanTimeout := True;
1111	>	end;
1112	>	end;
1113	>
1114	>	function TIBDatabase.GetIsReadOnly: Boolean;
1115	>	var
1116	>	DatabaseInfo: TIBDatabaseInfo;
1117	>	begin
1118	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1119	>	DatabaseInfo.Database := self;
1120	>	if (DatabaseInfo.ODSMajorVersion < 10) then
1121	>	result := false
1122	>	else
1123	>	begin
1124	>	if (DatabaseInfo.ReadOnly = 0) then
1125	>	result := false
1126	>	else
1127	>	result := true;
1128	>	end;
1129	>	DatabaseInfo.Free;
1130	>	end;
1131	>
1132	>	function TIBDatabase.GetSQLDialect: Integer;
1133	>	begin
1134	>	Result := FSQLDialect;
1135	>	end;
1136	>
1137	>
1138	>	procedure TIBDatabase.SetSQLDialect(const Value: Integer);
1139	>	begin
1140	>	if (Value < 1) then IBError(ibxeSQLDialectInvalid, [nil]);
1141	>	if ((FHandle = nil) or (Value <= FDBSQLDialect))  then
1142	>	FSQLDialect := Value
1143	>	else
1144	>	IBError(ibxeSQLDialectInvalid, [nil]);
1145	>	end;
1146	>
1147	>	function TIBDatabase.GetDBSQLDialect: Integer;
1148	>	var
1149	>	DatabaseInfo: TIBDatabaseInfo;
1150	>	begin
1151	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1152	>	DatabaseInfo.Database := self;
1153	>	result := DatabaseInfo.DBSQLDialect;
1154	>	DatabaseInfo.Free;
1155	>	end;
1156	>
1157	>	procedure TIBDatabase.ValidateClientSQLDialect;
1158	>	begin
1159	>	if (FDBSQLDialect < FSQLDialect) then
1160	>	begin
1161	>	FSQLDialect := FDBSQLDialect;
1162	>	if Assigned (FOnDialectDowngradeWarning) then
1163	>	FOnDialectDowngradeWarning(self);
1164	>	end;
1165	>	end;
1166	>
1167	>	procedure TIBDatabase.ApplyUpdates(const DataSets: array of TDataSet);
1168	>	var
1169	>	I: Integer;
1170	>	DS: TIBCustomDataSet;
1171	>	TR: TIBTransaction;
1172	>	begin
1173	>	TR := nil;
1174	>	for I := 0 to High(DataSets) do
1175	>	begin
1176	>	DS := TIBCustomDataSet(DataSets[I]);
1177	>	if DS.Database <> Self then
1178	>	IBError(ibxeUpdateWrongDB, [nil]);
1179	>	if TR = nil then
1180	>	TR := DS.Transaction;
1181	>	if (DS.Transaction <> TR) or (TR = nil) then
1182	>	IBError(ibxeUpdateWrongTR, [nil]);
1183	>	end;
1184	>	TR.CheckInTransaction;
1185	>	for I := 0 to High(DataSets) do
1186	>	begin
1187	>	DS := TIBCustomDataSet(DataSets[I]);
1188	>	DS.ApplyUpdates;
1189	>	end;
1190	>	TR.CommitRetaining;
1191	>	end;
1192	>
1193	>	procedure TIBDatabase.CloseDataSets;
1194	>	var
1195	>	i: Integer;
1196	>	begin
1197	>	for i := 0 to DataSetCount - 1 do
1198	>	if (DataSets[i] <> nil) then
1199	>	DataSets[i].close;
1200	>	end;
1201	>
1202	>	function TIBDatabase.GetDataset(Index : longint) : TDataset;
1203	>	begin
1204	>	if (Index >= 0) and (Index < FDataSets.Count) then
1205	>	Result := TDataSet(FDataSets[Index])
1206	>	else
1207	>	raise Exception.Create('Invalid Index to DataSets');
1208	>	end;
1209	>
1210	>	function TIBDatabase.GetDataSetCount : Longint;
1211	>	begin
1212	>	Result := FDataSets.Count;
1213	>	end;
1214	>
1215	>	procedure TIBDataBase.ReadState(Reader: TReader);
1216	>	begin
1217	>	FDBParams.Clear;
1218	>	inherited ReadState(Reader);
1219	>	end;
1220	>
1221	>	procedure TIBDataBase.SetConnected(Value: boolean);
1222	>	begin
1223	>	if StreamedConnected and not AllowStreamedConnected then
1224	>	begin
1225	>	StreamedConnected := false;
1226	>	Value := false
1227	>	end;
1228	>	inherited SetConnected(Value);
1229	>	end;
1230	>
1231	>	procedure TIBDatabase.GetFieldNames(const TableName: string; List: TStrings);
1232	>	var
1233	>	Query: TIBSQL;
1234	>	begin
1235	>	if TableName = '' then
1236	>	IBError(ibxeNoTableName, [nil]);
1237	>	if not Connected then
1238	>	Open;
1239	>	if not FInternalTransaction.Active then
1240	>	FInternalTransaction.StartTransaction;
1241	>	Query := TIBSQL.Create(self);
1242	>	try
1243	>	Query.GoToFirstRecordOnExecute := False;
1244	>	Query.Database := Self;
1245	>	Query.Transaction := FInternalTransaction;
1246	>	Query.SQL.Text := 'Select R.RDB$FIELD_NAME ' + {do not localize}
1247	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
1248	>	'where R.RDB$RELATION_NAME = ' + {do not localize}
1249	>	'''' +
1250	>	FormatIdentifierValue(SQLDialect, TableName) +
1251	>	''' ' +
1252	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '; {do not localize}
1253	>	Query.Prepare;
1254	>	Query.ExecQuery;
1255	>	with List do
1256	>	begin
1257	>	BeginUpdate;
1258	>	try
1259	>	Clear;
1260	>	while (not Query.EOF) and (Query.Next <> nil) do
1261	>	List.Add(TrimRight(Query.Current.ByName('RDB$FIELD_NAME').AsString)); {do not localize}
1262	>	finally
1263	>	EndUpdate;
1264	>	end;
1265	>	end;
1266	>	finally
1267	>	Query.free;
1268	>	FInternalTransaction.Commit;
1269	>	end;
1270	>	end;
1271	>
1272	>	procedure TIBDatabase.GetTableNames(List: TStrings; SystemTables: Boolean);
1273	>	var
1274	>	Query : TIBSQL;
1275	>	begin
1276	>	if not (csReading in ComponentState) then
1277	>	begin
1278	>	if not Connected then
1279	>	Open;
1280	>	if not FInternalTransaction.Active then
1281	>	FInternalTransaction.StartTransaction;
1282	>	Query := TIBSQL.Create(self);
1283	>	try
1284	>	Query.GoToFirstRecordOnExecute := False;
1285	>	Query.Database := Self;
1286	>	Query.Transaction := FInternalTransaction;
1287	>	if SystemTables then
1288	>	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1289	>	' where RDB$VIEW_BLR is NULL' {do not localize}
1290	>	else
1291	>	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1292	>	' where RDB$VIEW_BLR is NULL and RDB$SYSTEM_FLAG = 0'; {do not localize}
1293	>	Query.Prepare;
1294	>	Query.ExecQuery;
1295	>	with List do
1296	>	begin
1297	>	BeginUpdate;
1298	>	try
1299	>	Clear;
1300	>	while (not Query.EOF) and (Query.Next <> nil) do
1301	>	List.Add(TrimRight(Query.Current[0].AsString));
1302	>	finally
1303	>	EndUpdate;
1304	>	end;
1305	>	end;
1306	>	finally
1307	>	Query.Free;
1308	>	FInternalTransaction.Commit;
1309	>	end;
1310	>	end;
1311	>	end;
1312	>
1313	>	{ TIBTransaction }
1314	>
1315	>	constructor TIBTransaction.Create(AOwner: TComponent);
1316	>	begin
1317	>	inherited Create(AOwner);
1318	>	FIBLoaded := False;
1319	>	CheckIBLoaded;
1320	>	FIBLoaded := True;
1321	>	CheckIBLoaded;
1322	>	FDatabases := TList.Create;
1323	>	FSQLObjects := TList.Create;
1324	>	FHandle := nil;
1325	>	FTPB := nil;
1326	>	FTPBLength := 0;
1327	>	FTRParams := TStringList.Create;
1328	>	FTRParamsChanged := True;
1329	>	TStringList(FTRParams).OnChange := TRParamsChange;
1330	>	TStringList(FTRParams).OnChanging := TRParamsChanging;
1331	>	FTimer := TTimer.Create(Self);
1332	>	FTimer.Enabled := False;
1333	>	FTimer.Interval := 0;
1334	>	FTimer.OnTimer := TimeoutTransaction;
1335	>	FDefaultAction := taCommit;
1336	>	end;
1337	>
1338	>	destructor TIBTransaction.Destroy;
1339	>	var
1340	>	i: Integer;
1341	>	begin
1342	>	if FIBLoaded then
1343	>	begin
1344	>	if InTransaction then
1345	>	EndTransaction(FDefaultAction, True);
1346	>	for i := 0 to FSQLObjects.Count - 1 do
1347	>	if FSQLObjects[i] <> nil then
1348	>	SQLObjects[i].DoTransactionFree;
1349	>	RemoveSQLObjects;
1350	>	RemoveDatabases;
1351	>	FreeMem(FTPB);
1352	>	FTPB := nil;
1353	>	FTRParams.Free;
1354	>	FSQLObjects.Free;
1355	>	FDatabases.Free;
1356	>	end;
1357	>	inherited Destroy;
1358	>	end;
1359	>
1360	>	function TIBTransaction.Call(ErrCode: ISC_STATUS;
1361	>	RaiseError: Boolean): ISC_STATUS;
1362	>	var
1363	>	i: Integer;
1364	>	begin
1365	>	result := ErrCode;
1366	>	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1367	>	Databases[i].FCanTimeout := False;
1368	>	FCanTimeout := False;
1369	>	if RaiseError and (result > 0) then
1370	>	IBDataBaseError;
1371	>	end;
1372	>
1373	>	procedure TIBTransaction.CheckDatabasesInList;
1374	>	begin
1375	>	if GetDatabaseCount = 0 then
1376	>	IBError(ibxeNoDatabasesInTransaction, [nil]);
1377	>	end;
1378	>
1379	>	procedure TIBTransaction.CheckInTransaction;
1380	>	begin
1381	>	if FStreamedActive and (not InTransaction) then
1382	>	Loaded;
1383	>	if (FHandle = nil) then
1384	>	IBError(ibxeNotInTransaction, [nil]);
1385	>	end;
1386	>
1387	>	procedure TIBTransaction.EnsureNotInTransaction;
1388	>	begin
1389	>	if csDesigning in ComponentState then
1390	>	begin
1391	>	if FHandle <> nil then
1392	>	Rollback;
1393	>	end;
1394	>	end;
1395	>
1396	>	procedure TIBTransaction.CheckNotInTransaction;
1397	>	begin
1398	>	if (FHandle <> nil) then
1399	>	IBError(ibxeInTransaction, [nil]);
1400	>	end;
1401	>
1402	>	function TIBTransaction.AddDatabase(db: TIBDatabase): Integer;
1403	>	var
1404	>	i: Integer;
1405	>	NilFound: Boolean;
1406	>	begin
1407	>	i := FindDatabase(db);
1408	>	if i <> -1 then
1409	>	begin
1410	>	result := i;
1411	>	exit;
1412	>	end;
1413	>	NilFound := False;
1414	>	i := 0;
1415	>	while (not NilFound) and (i < FDatabases.Count) do
1416	>	begin
1417	>	NilFound := (FDatabases[i] = nil);
1418	>	if (not NilFound) then
1419	>	Inc(i);
1420	>	end;
1421	>	if (NilFound) then
1422	>	begin
1423	>	FDatabases[i] := db;
1424	>	result := i;
1425	>	end
1426	>	else
1427	>	begin
1428	>	result := FDatabases.Count;
1429	>	FDatabases.Add(db);
1430	>	end;
1431	>	end;
1432	>
1433	>	function TIBTransaction.AddSQLObject(ds: TIBBase): Integer;
1434	>	begin
1435	>	result := 0;
1436	>	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
1437	>	Inc(result);
1438	>	if (result = FSQLObjects.Count) then
1439	>	FSQLObjects.Add(ds)
1440	>	else
1441	>	FSQLObjects[result] := ds;
1442	>	end;
1443	>
1444	>	procedure TIBTransaction.Commit;
1445	>	begin
1446	>	EndTransaction(TACommit, False);
1447	>	end;
1448	>
1449	>	procedure TIBTransaction.CommitRetaining;
1450	>	begin
1451	>	EndTransaction(TACommitRetaining, False);
1452	>	end;
1453	>
1454	>	procedure TIBTransaction.EndTransaction(Action: TTransactionAction;
1455	>	Force: Boolean);
1456	>	var
1457	>	status: ISC_STATUS;
1458	>	i: Integer;
1459	>	begin
1460	>	CheckInTransaction;
1461	>	if FInEndTransaction then Exit;
1462	>	FInEndTransaction := true;
1463	>	try
1464	>	case Action of
1465	>	TARollback, TACommit:
1466	>	begin
1467	>	if (HandleIsShared) and
1468	>	(Action <> FDefaultAction) and
1469	>	(not Force) then
1470	>	IBError(ibxeCantEndSharedTransaction, [nil]);
1471	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1472	>	SQLObjects[i].DoBeforeTransactionEnd;
1473	>	if InTransaction then
1474	>	begin
1475	>	if HandleIsShared then
1476	>	begin
1477	>	FHandle := nil;
1478	>	FHandleIsShared := False;
1479	>	status := 0;
1480	>	end
1481	>	else
1482	>	if (Action = TARollback) then
1483	>	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False)
1484	>	else
1485	>	status := Call(isc_commit_transaction(StatusVector, @FHandle), False);
1486	>	if ((Force) and (status > 0)) then
1487	>	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False);
1488	>	if Force then
1489	>	FHandle := nil
1490	>	else
1491	>	if (status > 0) then
1492	>	IBDataBaseError;
1493	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1494	>	SQLObjects[i].DoAfterTransactionEnd;
1495	>	end;
1496	>	end;
1497	>	TACommitRetaining:
1498	>	Call(isc_commit_retaining(StatusVector, @FHandle), True);
1499	>	TARollbackRetaining:
1500	>	Call(isc_rollback_retaining(StatusVector, @FHandle), True);
1501	>	end;
1502	>	if not (csDesigning in ComponentState) then
1503	>	begin
1504	>	case Action of
1505	>	TACommit:
1506	>	MonitorHook.TRCommit(Self);
1507	>	TARollback:
1508	>	MonitorHook.TRRollback(Self);
1509	>	TACommitRetaining:
1510	>	MonitorHook.TRCommitRetaining(Self);
1511	>	TARollbackRetaining:
1512	>	MonitorHook.TRRollbackRetaining(Self);
1513	>	end;
1514	>	end;
1515	>	finally
1516	>	FInEndTransaction := false
1517	>	end;
1518	>	end;
1519	>
1520	>	function TIBTransaction.GetDatabase(Index: Integer): TIBDatabase;
1521	>	begin
1522	>	result := FDatabases[Index];
1523	>	end;
1524	>
1525	>	function TIBTransaction.GetDatabaseCount: Integer;
1526	>	var
1527	>	i, Cnt: Integer;
1528	>	begin
1529	>	result := 0;
1530	>	Cnt := FDatabases.Count - 1;
1531	>	for i := 0 to Cnt do if FDatabases[i] <> nil then
1532	>	Inc(result);
1533	>	end;
1534	>
1535	>	function TIBTransaction.GetSQLObject(Index: Integer): TIBBase;
1536	>	begin
1537	>	result := FSQLObjects[Index];
1538	>	end;
1539	>
1540	>	function TIBTransaction.GetSQLObjectCount: Integer;
1541	>	var
1542	>	i, Cnt: Integer;
1543	>	begin
1544	>	result := 0;
1545	>	Cnt := FSQLObjects.Count - 1;
1546	>	for i := 0 to Cnt do if FSQLObjects[i] <> nil then
1547	>	Inc(result);
1548	>	end;
1549	>
1550	>	function TIBTransaction.GetInTransaction: Boolean;
1551	>	begin
1552	>	result := (FHandle <> nil);
1553	>	end;
1554	>
1555	>	function TIBTransaction.FindDatabase(db: TIBDatabase): Integer;
1556	>	var
1557	>	i: Integer;
1558	>	begin
1559	>	result := -1;
1560	>	for i := 0 to FDatabases.Count - 1 do
1561	>	if db = TIBDatabase(FDatabases[i]) then
1562	>	begin
1563	>	result := i;
1564	>	break;
1565	>	end;
1566	>	end;
1567	>
1568	>	function TIBTransaction.FindDefaultDatabase: TIBDatabase;
1569	>	var
1570	>	i: Integer;
1571	>	begin
1572	>	result := FDefaultDatabase;
1573	>	if result = nil then
1574	>	begin
1575	>	for i := 0 to FDatabases.Count - 1 do
1576	>	if (TIBDatabase(FDatabases[i]) <> nil) and
1577	>	(TIBDatabase(FDatabases[i]).DefaultTransaction = self) then
1578	>	begin
1579	>	result := TIBDatabase(FDatabases[i]);
1580	>	break;
1581	>	end;
1582	>	end;
1583	>	end;
1584	>
1585	>
1586	>	function TIBTransaction.GetIdleTimer: Integer;
1587	>	begin
1588	>	result := FTimer.Interval;
1589	>	end;
1590	>
1591	>	procedure TIBTransaction.Loaded;
1592	>	begin
1593	>	inherited Loaded;
1594	>	end;
1595	>
1596	>	procedure TIBTransaction.BeforeDatabaseDisconnect(DB: TIBDatabase);
1597	>	begin
1598	>	if InTransaction then
1599	>	EndTransaction(FDefaultAction, True);
1600	>	end;
1601	>
1602	>	procedure TIBTransaction.RemoveDatabase(Idx: Integer);
1603	>	var
1604	>	DB: TIBDatabase;
1605	>	begin
1606	>	if ((Idx >= 0) and (FDatabases[Idx] <> nil)) then
1607	>	begin
1608	>	DB := Databases[Idx];
1609	>	FDatabases[Idx] := nil;
1610	>	DB.RemoveTransaction(DB.FindTransaction(Self));
1611	>	if DB = FDefaultDatabase then
1612	>	FDefaultDatabase := nil;
1613	>	end;
1614	>	end;
1615	>
1616	>	procedure TIBTransaction.RemoveDatabases;
1617	>	var
1618	>	i: Integer;
1619	>	begin
1620	>	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1621	>	RemoveDatabase(i);
1622	>	end;
1623	>
1624	>	procedure TIBTransaction.RemoveSQLObject(Idx: Integer);
1625	>	var
1626	>	ds: TIBBase;
1627	>	begin
1628	>	if ((Idx >= 0) and (FSQLObjects[Idx] <> nil)) then
1629	>	begin
1630	>	ds := SQLObjects[Idx];
1631	>	FSQLObjects[Idx] := nil;
1632	>	ds.Transaction := nil;
1633	>	end;
1634	>	end;
1635	>
1636	>	procedure TIBTransaction.RemoveSQLObjects;
1637	>	var
1638	>	i: Integer;
1639	>	begin
1640	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1641	>	RemoveSQLObject(i);
1642	>	end;
1643	>
1644	>	procedure TIBTransaction.Rollback;
1645	>	begin
1646	>	EndTransaction(TARollback, False);
1647	>	end;
1648	>
1649	>	procedure TIBTransaction.RollbackRetaining;
1650	>	begin
1651	>	EndTransaction(TARollbackRetaining, False);
1652	>	end;
1653	>
1654	>	procedure TIBTransaction.SetActive(Value: Boolean);
1655	>	begin
1656	>	if csReading in ComponentState then
1657	>	FStreamedActive := Value
1658	>	else
1659	>	if Value and not InTransaction then
1660	>	StartTransaction
1661	>	else
1662	>	if not Value and InTransaction then
1663	>	Rollback;
1664	>	end;
1665	>
1666	>	procedure TIBTransaction.SetDefaultAction(Value: TTransactionAction);
1667	>	begin
1668	>	(*  if (Value = taRollbackRetaining) and (GetIBClientVersion < 6) then
1669	>	IBError(ibxeIB60feature, [nil]);*)
1670	>	FDefaultAction := Value;
1671	>	end;
1672	>
1673	>	procedure TIBTransaction.SetDefaultDatabase(Value: TIBDatabase);
1674	>	var
1675	>	i: integer;
1676	>	begin
1677	>	if (FDefaultDatabase <> nil) and (FDefaultDatabase <> Value) then
1678	>	begin
1679	>	i := FDefaultDatabase.FindTransaction(self);
1680	>	if (i <> -1) then
1681	>	FDefaultDatabase.RemoveTransaction(i);
1682	>	end;
1683	>	if (Value <> nil) and (FDefaultDatabase <> Value) then
1684	>	begin
1685	>	Value.AddTransaction(Self);
1686	>	AddDatabase(Value);
1687	>	for i := 0 to FSQLObjects.Count - 1 do
1688	>	if (FSQLObjects[i] <> nil) and
1689	>	(TIBBase(FSQLObjects[i]).Database = nil) then
1690	>	SetOrdProp(TIBBase(FSQLObjects[i]).Owner, 'Database', Integer(Value));
1691	>	end;
1692	>	FDefaultDatabase := Value;
1693	>	end;
1694	>
1695	>	procedure TIBTransaction.SetHandle(Value: TISC_TR_HANDLE);
1696	>	begin
1697	>	if (HandleIsShared) then
1698	>	EndTransaction(DefaultAction, True)
1699	>	else
1700	>	CheckNotInTransaction;
1701	>	FHandle := Value;
1702	>	FHandleIsShared := (Value <> nil);
1703	>	end;
1704	>
1705	>	procedure TIBTransaction.Notification( AComponent: TComponent;
1706	>	Operation: TOperation);
1707	>	var
1708	>	i: Integer;
1709	>	begin
1710	>	inherited Notification( AComponent, Operation);
1711	>	if (Operation = opRemove) and (AComponent = FDefaultDatabase) then
1712	>	begin
1713	>	i := FindDatabase(FDefaultDatabase);
1714	>	if (i <> -1) then
1715	>	RemoveDatabase(i);
1716	>	FDefaultDatabase := nil;
1717	>	end;
1718	>	end;
1719	>
1720	>	procedure TIBTransaction.SetIdleTimer(Value: Integer);
1721	>	begin
1722	>	if Value < 0 then
1723	>	IBError(ibxeTimeoutNegative, [nil])
1724	>	else
1725	>	if (Value = 0) then
1726	>	begin
1727	>	FTimer.Enabled := False;
1728	>	FTimer.Interval := 0;
1729	>	end
1730	>	else
1731	>	if (Value > 0) then
1732	>	begin
1733	>	FTimer.Interval := Value;
1734	>	if not (csDesigning in ComponentState) then
1735	>	FTimer.Enabled := True;
1736	>	end;
1737	>	end;
1738	>
1739	>	procedure TIBTransaction.SetTRParams(Value: TStrings);
1740	>	begin
1741	>	FTRParams.Assign(Value);
1742	>	end;
1743	>
1744	>	procedure TIBTransaction.StartTransaction;
1745	>	var
1746	>	pteb: PISC_TEB_ARRAY;
1747	>	TPB: String;
1748	>	i: Integer;
1749	>	begin
1750	>	CheckNotInTransaction;
1751	>	CheckDatabasesInList;
1752	>	for i := 0 to FDatabases.Count - 1 do
1753	>	if  FDatabases[i] <> nil then
1754	>	begin
1755	>	with TIBDatabase(FDatabases[i]) do
1756	>	if not Connected then
1757	>	if FStreamedConnected then
1758	>	begin
1759	>	Open;
1760	>	FStreamedConnected := False;
1761	>	end
1762	>	else
1763	>	IBError(ibxeDatabaseClosed, [nil]);
1764	>	end;
1765	>	if FTRParamsChanged then
1766	>	begin
1767	>	FTRParamsChanged := False;
1768	>	GenerateTPB(FTRParams, TPB, FTPBLength);
1769	>	if FTPBLength > 0 then
1770	>	begin
1771	>	IBAlloc(FTPB, 0, FTPBLength);
1772	>	Move(TPB[1], FTPB[0], FTPBLength);
1773	>	end;
1774	>	end;
1775	>
1776	>	pteb := nil;
1777	>	IBAlloc(pteb, 0, DatabaseCount * SizeOf(TISC_TEB));
1778	>	try
1779	>	for i := 0 to DatabaseCount - 1 do if Databases[i] <> nil then
1780	>	begin
1781	>	pteb^[i].db_handle := @(Databases[i].Handle);
1782	>	pteb^[i].tpb_length := FTPBLength;
1783	>	pteb^[i].tpb_address := FTPB;
1784	>	end;
1785	>	if Call(isc_start_multiple(StatusVector, @FHandle,
1786	>	DatabaseCount, PISC_TEB(pteb)), False) > 0 then
1787	>	begin
1788	>	FHandle := nil;
1789	>	IBDataBaseError;
1790	>	end;
1791	>	if not (csDesigning in ComponentState) then
1792	>	MonitorHook.TRStart(Self);
1793	>	finally
1794	>	FreeMem(pteb);
1795	>	end;
1796	>	end;
1797	>
1798	>	procedure TIBTransaction.TimeoutTransaction(Sender: TObject);
1799	>	begin
1800	>	if InTransaction then
1801	>	begin
1802	>	if FCanTimeout then
1803	>	begin
1804	>	EndTransaction(FDefaultAction, True);
1805	>	if Assigned(FOnIdleTimer) then
1806	>	FOnIdleTimer(Self);
1807	>	end
1808	>	else
1809	>	FCanTimeout := True;
1810	>	end;
1811	>	end;
1812	>
1813	>	procedure TIBTransaction.TRParamsChange(Sender: TObject);
1814	>	begin
1815	>	FTRParamsChanged := True;
1816	>	end;
1817	>
1818	>	procedure TIBTransaction.TRParamsChanging(Sender: TObject);
1819	>	begin
1820	>	EnsureNotInTransaction;
1821	>	CheckNotInTransaction;
1822	>	end;
1823	>
1824	>	{ TIBBase }
1825	>	constructor TIBBase.Create(AOwner: TObject);
1826	>	begin
1827	>	FOwner := AOwner;
1828	>	end;
1829	>
1830	>	destructor TIBBase.Destroy;
1831	>	begin
1832	>	SetDatabase(nil);
1833	>	SetTransaction(nil);
1834	>	inherited Destroy;
1835	>	end;
1836	>
1837	>	procedure TIBBase.CheckDatabase;
1838	>	begin
1839	>	if (FDatabase = nil) then
1840	>	IBError(ibxeDatabaseNotAssigned, [nil]);
1841	>	FDatabase.CheckActive;
1842	>	end;
1843	>
1844	>	procedure TIBBase.CheckTransaction;
1845	>	begin
1846	>	if FTransaction = nil then
1847	>	IBError(ibxeTransactionNotAssigned, [nil]);
1848	>	FTransaction.CheckInTransaction;
1849	>	end;
1850	>
1851	>	function TIBBase.GetDBHandle: PISC_DB_HANDLE;
1852	>	begin
1853	>	CheckDatabase;
1854	>	result := @FDatabase.Handle;
1855	>	end;
1856	>
1857	>	function TIBBase.GetTRHandle: PISC_TR_HANDLE;
1858	>	begin
1859	>	CheckTransaction;
1860	>	result := @FTransaction.Handle;
1861	>	end;
1862	>
1863	>	procedure TIBBase.DoAfterDatabaseConnect;
1864	>	begin
1865	>	if assigned(FAfterDatabaseConnect) then
1866	>	AfterDatabaseConnect(self);
1867	>	end;
1868	>
1869	>	procedure TIBBase.DoBeforeDatabaseDisconnect;
1870	>	begin
1871	>	if Assigned(BeforeDatabaseDisconnect) then
1872	>	BeforeDatabaseDisconnect(Self);
1873	>	end;
1874	>
1875	>	procedure TIBBase.DoAfterDatabaseDisconnect;
1876	>	begin
1877	>	if Assigned(AfterDatabaseDisconnect) then
1878	>	AfterDatabaseDisconnect(Self);
1879	>	end;
1880	>
1881	>	procedure TIBBase.DoDatabaseFree;
1882	>	begin
1883	>	if Assigned(OnDatabaseFree) then
1884	>	OnDatabaseFree(Self);
1885	>	SetDatabase(nil);
1886	>	SetTransaction(nil);
1887	>	end;
1888	>
1889	>	procedure TIBBase.DoBeforeTransactionEnd;
1890	>	begin
1891	>	if Assigned(BeforeTransactionEnd) then
1892	>	BeforeTransactionEnd(Self);
1893	>	end;
1894	>
1895	>	procedure TIBBase.DoAfterTransactionEnd;
1896	>	begin
1897	>	if Assigned(AfterTransactionEnd) then
1898	>	AfterTransactionEnd(Self);
1899	>	end;
1900	>
1901	>	procedure TIBBase.DoTransactionFree;
1902	>	begin
1903	>	if Assigned(OnTransactionFree) then
1904	>	OnTransactionFree(Self);
1905	>	FTransaction := nil;
1906	>	end;
1907	>
1908	>	procedure TIBBase.SetDatabase(Value: TIBDatabase);
1909	>	begin
1910	>	if (FDatabase <> nil) then
1911	>	FDatabase.RemoveSQLObject(FIndexInDatabase);
1912	>	FDatabase := Value;
1913	>	if (FDatabase <> nil) then
1914	>	begin
1915	>	FIndexInDatabase := FDatabase.AddSQLObject(Self);
1916	>	if (FTransaction = nil) then
1917	>	Transaction := FDatabase.FindDefaultTransaction;
1918	>	end;
1919	>	end;
1920	>
1921	>	procedure TIBBase.SetTransaction(Value: TIBTransaction);
1922	>	begin
1923	>	if (FTransaction <> nil) then
1924	>	FTransaction.RemoveSQLObject(FIndexInTransaction);
1925	>	FTransaction := Value;
1926	>	if (FTransaction <> nil) then
1927	>	begin
1928	>	FIndexInTransaction := FTransaction.AddSQLObject(Self);
1929	>	if (FDatabase = nil) then
1930	>	Database := FTransaction.FindDefaultDatabase;
1931	>	end;
1932	>	end;
1933	>
1934	>	{ GenerateDPB -
1935	>	Given a string containing a textual representation
1936	>	of the database parameters, generate a database
1937	>	parameter buffer, and return it and its length
1938	>	in DPB and DPBLength, respectively. }
1939	>
1940	>	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
1941	>	var
1942	>	i, j, pval: Integer;
1943	>	DPBVal: UShort;
1944	>	ParamName, ParamValue: string;
1945	>	begin
1946	>	{ The DPB is initially empty, with the exception that
1947	>	the DPB version must be the first byte of the string. }
1948	>	DPBLength := 1;
1949	>	DPB := Char(isc_dpb_version1);
1950	>
1951	>	{Iterate through the textual database parameters, constructing
1952	>	a DPB on-the-fly }
1953	>	for i := 0 to sl.Count - 1 do
1954	>	begin
1955	>	{ Get the parameter's name and value from the list,
1956	>	and make sure that the name is all lowercase with
1957	>	no leading 'isc_dpb_' prefix
1958	>	}
1959	>	if (Trim(sl.Names[i]) = '') then
1960	>	continue;
1961	>	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
1962	>	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
1963	>	if (Pos(DPBPrefix, ParamName) = 1) then {mbcs ok}
1964	>	Delete(ParamName, 1, Length(DPBPrefix));
1965	>	{ We want to translate the parameter name to some Integer
1966	>	value. We do this by scanning through a list of known
1967	>	database parameter names (DPBConstantNames, defined above) }
1968	>	DPBVal := 0;
1969	>	{ Find the parameter }
1970	>	for j := 1 to isc_dpb_last_dpb_constant do
1971	>	if (ParamName = DPBConstantNames[j]) then
1972	>	begin
1973	>	DPBVal := j;
1974	>	break;
1975	>	end;
1976	>	{  A database parameter either contains a string value (case 1)
1977	>	or an Integer value (case 2)
1978	>	or no value at all (case 3)
1979	>	or an error needs to be generated (case else)  }
1980	>	case DPBVal of
1981	>	isc_dpb_user_name, isc_dpb_password, isc_dpb_password_enc,
1982	>	isc_dpb_sys_user_name, isc_dpb_license, isc_dpb_encrypt_key,
1983	>	isc_dpb_lc_messages, isc_dpb_lc_ctype,
1984	>	isc_dpb_sql_role_name, isc_dpb_sql_dialect:
1985	>	begin
1986	>	if DPBVal = isc_dpb_sql_dialect then
1987	>	ParamValue[1] := Char(Ord(ParamValue[1]) - 48);
1988	>	DPB := DPB +
1989	>	Char(DPBVal) +
1990	>	Char(Length(ParamValue)) +
1991	>	ParamValue;
1992	>	Inc(DPBLength, 2 + Length(ParamValue));
1993	>	end;
1994	>	isc_dpb_num_buffers, isc_dpb_dbkey_scope, isc_dpb_force_write,
1995	>	isc_dpb_no_reserve, isc_dpb_damaged, isc_dpb_verify:
1996	>	begin
1997	>	DPB := DPB +
1998	>	Char(DPBVal) +
1999	>	#1 +
2000	>	Char(StrToInt(ParamValue));
2001	>	Inc(DPBLength, 3);
2002	>	end;
2003	>	isc_dpb_sweep:
2004	>	begin
2005	>	DPB := DPB +
2006	>	Char(DPBVal) +
2007	>	#1 +
2008	>	Char(isc_dpb_records);
2009	>	Inc(DPBLength, 3);
2010	>	end;
2011	>	isc_dpb_sweep_interval:
2012	>	begin
2013	>	pval := StrToInt(ParamValue);
2014	>	DPB := DPB +
2015	>	Char(DPBVal) +
2016	>	#4 +
2017	>	PChar(@pval)[0] +
2018	>	PChar(@pval)[1] +
2019	>	PChar(@pval)[2] +
2020	>	PChar(@pval)[3];
2021	>	Inc(DPBLength, 6);
2022	>	end;
2023	>	isc_dpb_activate_shadow, isc_dpb_delete_shadow, isc_dpb_begin_log,
2024	>	isc_dpb_quit_log:
2025	>	begin
2026	>	DPB := DPB +
2027	>	Char(DPBVal) +
2028	>	#1 + #0;
2029	>	Inc(DPBLength, 3);
2030	>	end;
2031	>	else
2032	>	begin
2033	>	if (DPBVal > 0) and
2034	>	(DPBVal <= isc_dpb_last_dpb_constant) then
2035	>	IBError(ibxeDPBConstantNotSupported, [DPBConstantNames[DPBVal]])
2036	>	else
2037	>	IBError(ibxeDPBConstantUnknownEx, [sl.Names[i]]);
2038	>	end;
2039	>	end;
2040	>	end;
2041	>	end;
2042	>
2043	>	{ GenerateTPB -
2044	>	Given a string containing a textual representation
2045	>	of the transaction parameters, generate a transaction
2046	>	parameter buffer, and return it and its length in
2047	>	TPB and TPBLength, respectively. }
2048	>	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
2049	>	var
2050	>	i, j, TPBVal, ParamLength: Integer;
2051	>	ParamName, ParamValue: string;
2052	>	begin
2053	>	TPB := '';
2054	>	if (sl.Count = 0) then
2055	>	TPBLength := 0
2056	>	else
2057	>	begin
2058	>	TPBLength := sl.Count + 1;
2059	>	TPB := TPB + Char(isc_tpb_version3);
2060	>	end;
2061	>	for i := 0 to sl.Count - 1 do
2062	>	begin
2063	>	if (Trim(sl[i]) =  '') then
2064	>	begin
2065	>	Dec(TPBLength);
2066	>	Continue;
2067	>	end;
2068	>	if (Pos('=', sl[i]) = 0) then {mbcs ok}
2069	>	ParamName := LowerCase(sl[i]) {mbcs ok}
2070	>	else
2071	>	begin
2072	>	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
2073	>	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
2074	>	end;
2075	>	if (Pos(TPBPrefix, ParamName) = 1) then {mbcs ok}
2076	>	Delete(ParamName, 1, Length(TPBPrefix));
2077	>	TPBVal := 0;
2078	>	{ Find the parameter }
2079	>	for j := 1 to isc_tpb_last_tpb_constant do
2080	>	if (ParamName = TPBConstantNames[j]) then
2081	>	begin
2082	>	TPBVal := j;
2083	>	break;
2084	>	end;
2085	>	{ Now act on it }
2086	>	case TPBVal of
2087	>	isc_tpb_consistency, isc_tpb_exclusive, isc_tpb_protected,
2088	>	isc_tpb_concurrency, isc_tpb_shared, isc_tpb_wait, isc_tpb_nowait,
2089	>	isc_tpb_read, isc_tpb_write, isc_tpb_ignore_limbo,
2090	>	isc_tpb_read_committed, isc_tpb_rec_version, isc_tpb_no_rec_version:
2091	>	TPB := TPB + Char(TPBVal);
2092	>	isc_tpb_lock_read, isc_tpb_lock_write:
2093	>	begin
2094	>	TPB := TPB + Char(TPBVal);
2095	>	{ Now set the string parameter }
2096	>	ParamLength := Length(ParamValue);
2097	>	Inc(TPBLength, ParamLength + 1);
2098	>	TPB := TPB + Char(ParamLength) + ParamValue;
2099	>	end;
2100	>	else
2101	>	begin
2102	>	if (TPBVal > 0) and
2103	>	(TPBVal <= isc_tpb_last_tpb_constant) then
2104	>	IBError(ibxeTPBConstantNotSupported, [TPBConstantNames[TPBVal]])
2105	>	else
2106	>	IBError(ibxeTPBConstantUnknownEx, [sl.Names[i]]);
2107	>	end;
2108	>	end;
2109	>	end;
2110	>	end;
2111	>
2112	>	end.
2113	>
2114	>
2115	>
2116	>
2117	>

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