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root/public/ibx/trunk/runtime/IBDatabase.pas

Comparing ibx/trunk/runtime/IBDatabase.pas (file contents):
Revision 5 by tony, Fri Feb 18 16:26:16 2011 UTC vs.
Revision 31 by tony, Tue Jul 14 15:31:25 2015 UTC

#	Line 1 | Line 1
1	<	{************************************************************************}
2	<	{                                                                        }
3	<	{       Borland Delphi Visual Component Library                          }
4	<	{       InterBase Express core components                                }
5	<	{                                                                        }
6	<	{       Copyright (c) 1998-2000 Inprise Corporation                      }
7	<	{                                                                        }
8	<	{    InterBase Express is based in part on the product                   }
9	<	{    Free IB Components, written by Gregory H. Deatz for                 }
10	<	{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
11	<	{    Free IB Components is used under license.                           }
12	<	{                                                                        }
13	<	{    The contents of this file are subject to the InterBase              }
14	<	{    Public License Version 1.0 (the "License"); you may not             }
15	<	{    use this file except in compliance with the License. You            }
16	<	{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	<	{    Software distributed under the License is distributed on            }
18	<	{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
19	<	{    express or implied. See the License for the specific language       }
20	<	{    governing rights and limitations under the License.                 }
21	<	{    The Original Code was created by InterBase Software Corporation     }
22	<	{       and its successors.                                              }
23	<	{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
24	<	{       Corporation. All Rights Reserved.                                }
25	<	{    Contributor(s): Jeff Overcash                                       }
26	<	{                                                                        }
27	<	{************************************************************************}
28	<
29	<	unit IBDatabase;
30	<
31	<	{$Mode Delphi}
32	<
33	<	interface
34	<
35	<	uses
36	<	{$IFDEF LINUX }
37	<	unix,
38	<	{$ELSE}
39	<	{$DEFINE HAS_SQLMONITOR}
40	<	Windows,
41	<	{$ENDIF}
42	<	Dialogs, Controls, StdCtrls, SysUtils, Classes, Forms, ExtCtrls, IBHeader, IBExternals, DB,
43	<	IB, DBLoginDlg;
44	<
45	<	const
46	<	DPBPrefix = 'isc_dpb_';
47	<	DPBConstantNames: array[1..isc_dpb_last_dpb_constant] of string = (
48	<	'cdd_pathname',
49	<	'allocation',
50	<	'journal',
51	<	'page_size',
52	<	'num_buffers',
53	<	'buffer_length',
54	<	'debug',
55	<	'garbage_collect',
56	<	'verify',
57	<	'sweep',
58	<	'enable_journal',
59	<	'disable_journal',
60	<	'dbkey_scope',
61	<	'number_of_users',
62	<	'trace',
63	<	'no_garbage_collect',
64	<	'damaged',
65	<	'license',
66	<	'sys_user_name',
67	<	'encrypt_key',
68	<	'activate_shadow',
69	<	'sweep_interval',
70	<	'delete_shadow',
71	<	'force_write',
72	<	'begin_log',
73	<	'quit_log',
74	<	'no_reserve',
75	<	'user_name',
76	<	'password',
77	<	'password_enc',
78	<	'sys_user_name_enc',
79	<	'interp',
80	<	'online_dump',
81	<	'old_file_size',
82	<	'old_num_files',
83	<	'old_file',
84	<	'old_start_page',
85	<	'old_start_seqno',
86	<	'old_start_file',
87	<	'drop_walfile',
88	<	'old_dump_id',
89	<	'wal_backup_dir',
90	<	'wal_chkptlen',
91	<	'wal_numbufs',
92	<	'wal_bufsize',
93	<	'wal_grp_cmt_wait',
94	<	'lc_messages',
95	<	'lc_ctype',
96	<	'cache_manager',
97	<	'shutdown',
98	<	'online',
99	<	'shutdown_delay',
100	<	'reserved',
101	<	'overwrite',
102	<	'sec_attach',
103	<	'disable_wal',
104	<	'connect_timeout',
105	<	'dummy_packet_interval',
106	<	'gbak_attach',
107	<	'sql_role_name',
108	<	'set_page_buffers',
109	<	'working_directory',
110	<	'sql_dialect',
111	<	'set_db_readonly',
112	<	'set_db_sql_dialect',
113	<	'gfix_attach',
114	<	'gstat_attach'
115	<	);
116	<
117	<	TPBPrefix = 'isc_tpb_';
118	<	TPBConstantNames: array[1..isc_tpb_last_tpb_constant] of string = (
119	<	'consistency',
120	<	'concurrency',
121	<	'shared',
122	<	'protected',
123	<	'exclusive',
124	<	'wait',
125	<	'nowait',
126	<	'read',
127	<	'write',
128	<	'lock_read',
129	<	'lock_write',
130	<	'verb_time',
131	<	'commit_time',
132	<	'ignore_limbo',
133	<	'read_committed',
134	<	'autocommit',
135	<	'rec_version',
136	<	'no_rec_version',
137	<	'restart_requests',
138	<	'no_auto_undo'
139	<	);
140	<
141	<	type
142	<
143	<	TIBDatabase = class;
144	<	TIBTransaction = class;
145	<	TIBBase = class;
146	<
147	<	TIBDatabaseLoginEvent = procedure(Database: TIBDatabase;
148	<	LoginParams: TStrings) of object;
149	<
150	<	TIBFileName = type string;
151	<	{ TIBDatabase }
152	<	TIBDataBase = class(TCustomConnection)
153	<	private
154	<	FHiddenPassword: string;
155	<	FIBLoaded: Boolean;
156	<	FOnLogin: TIBDatabaseLoginEvent;
157	<	FTraceFlags: TTraceFlags;
158	<	FDBSQLDialect: Integer;
159	<	FSQLDialect: Integer;
160	<	FOnDialectDowngradeWarning: TNotifyEvent;
161	<	FCanTimeout: Boolean;
162	<	FSQLObjects: TList;
163	<	FTransactions: TList;
164	<	FDBName: TIBFileName;
165	<	FDBParams: TStrings;
166	<	FDBParamsChanged: Boolean;
167	<	FDPB: PChar;
168	<	FDPBLength: Short;
169	<	FHandle: TISC_DB_HANDLE;
170	<	FHandleIsShared: Boolean;
171	<	FOnIdleTimer: TNotifyEvent;
172	<	FDefaultTransaction: TIBTransaction;
173	<	FInternalTransaction: TIBTransaction;
174	<	FStreamedConnected: Boolean;
175	<	FTimer: TTimer;
176	<	FUserNames: TStringList;
177	<	FDataSets: TList;
178	<	procedure EnsureInactive;
179	<	function GetDBSQLDialect: Integer;
180	<	function GetSQLDialect: Integer;
181	<	procedure SetSQLDialect(const Value: Integer);
182	<	procedure ValidateClientSQLDialect;
183	<	procedure DBParamsChange(Sender: TObject);
184	<	procedure DBParamsChanging(Sender: TObject);
185	<	function GetSQLObject(Index: Integer): TIBBase;
186	<	function GetSQLObjectCount: Integer;
187	<	function GetDBParamByDPB(const Idx: Integer): String;
188	<	function GetIdleTimer: Integer;
189	<	function GetTransaction(Index: Integer): TIBTransaction;
190	<	function GetTransactionCount: Integer;
191	<	function Login: Boolean;
192	<	procedure SetDatabaseName(const Value: TIBFileName);
193	<	procedure SetDBParamByDPB(const Idx: Integer; Value: String);
194	<	procedure SetDBParams(Value: TStrings);
195	<	procedure SetDefaultTransaction(Value: TIBTransaction);
196	<	procedure SetIdleTimer(Value: Integer);
197	<	procedure TimeoutConnection(Sender: TObject);
198	<	function GetIsReadOnly: Boolean;
199	<	function AddSQLObject(ds: TIBBase): Integer;
200	<	procedure RemoveSQLObject(Idx: Integer);
201	<	procedure RemoveSQLObjects;
202	<	procedure InternalClose(Force: Boolean);
203	<
204	<	protected
205	<	procedure DoConnect; override;
206	<	procedure DoDisconnect; override;
207	<	function GetConnected: Boolean; override;
208	<	procedure Loaded; override;
209	<	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
210	<	function GetDataset(Index : longint) : TDataset; override;
211	<	function GetDataSetCount : Longint; override;
212	<
213	<	public
214	<	constructor Create(AOwner: TComponent); override;
215	<	destructor Destroy; override;
216	<	procedure ApplyUpdates(const DataSets: array of TDataSet);
217	<	procedure CloseDataSets;
218	<	procedure CheckActive;
219	<	procedure CheckInactive;
220	<	procedure CreateDatabase;
221	<	procedure DropDatabase;
222	<	procedure ForceClose;
223	<	procedure GetFieldNames(const TableName: string; List: TStrings);
224	<	procedure GetTableNames(List: TStrings; SystemTables: Boolean = False);
225	<	function IndexOfDBConst(st: String): Integer;
226	<	function TestConnected: Boolean;
227	<	procedure CheckDatabaseName;
228	<	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
229	<	function AddTransaction(TR: TIBTransaction): Integer;
230	<	function FindTransaction(TR: TIBTransaction): Integer;
231	<	function FindDefaultTransaction(): TIBTransaction;
232	<	procedure RemoveTransaction(Idx: Integer);
233	<	procedure RemoveTransactions;
234	<	procedure SetHandle(Value: TISC_DB_HANDLE);
235	<
236	<	property Handle: TISC_DB_HANDLE read FHandle;
237	<	property IsReadOnly: Boolean read GetIsReadOnly;
238	<	property DBParamByDPB[const Idx: Integer]: String read GetDBParamByDPB
239	<	write SetDBParamByDPB;
240	<	property SQLObjectCount: Integer read GetSQLObjectCount;
241	<	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
242	<	property HandleIsShared: Boolean read FHandleIsShared;
243	<	property TransactionCount: Integer read GetTransactionCount;
244	<	property Transactions[Index: Integer]: TIBTransaction read GetTransaction;
245	<	property InternalTransaction: TIBTransaction read FInternalTransaction;
246	<
247	<	published
248	<	property Connected;
249	<	property StreamedConnected;
250	<	property DatabaseName: TIBFileName read FDBName write SetDatabaseName;
251	<	property Params: TStrings read FDBParams write SetDBParams;
252	<	property LoginPrompt default True;
253	<	property DefaultTransaction: TIBTransaction read FDefaultTransaction
254	<	write SetDefaultTransaction;
255	<	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer;
256	<	property SQLDialect : Integer read GetSQLDialect write SetSQLDialect default 3;
257	<	property DBSQLDialect : Integer read FDBSQLDialect;
258	<	property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
259	<	property AfterConnect;
260	<	property AfterDisconnect;
261	<	property BeforeConnect;
262	<	property BeforeDisconnect;
263	<	property OnLogin: TIBDatabaseLoginEvent read FOnLogin write FOnLogin;
264	<	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
265	<	property OnDialectDowngradeWarning: TNotifyEvent read FOnDialectDowngradeWarning write FOnDialectDowngradeWarning;
266	<	end;
267	<
268	<	{ TIBTransaction }
269	<
270	<	TTransactionAction         = (TARollback, TACommit, TARollbackRetaining, TACommitRetaining);
271	<
272	<	TIBTransaction = class(TComponent)
273	<	private
274	<	FIBLoaded: Boolean;
275	<	FCanTimeout         : Boolean;
276	<	FDatabases          : TList;
277	<	FSQLObjects         : TList;
278	<	FDefaultDatabase    : TIBDatabase;
279	<	FHandle             : TISC_TR_HANDLE;
280	<	FHandleIsShared     : Boolean;
281	<	FOnIdleTimer          : TNotifyEvent;
282	<	FStreamedActive     : Boolean;
283	<	FTPB                : PChar;
284	<	FTPBLength          : Short;
285	<	FTimer              : TTimer;
286	<	FDefaultAction      : TTransactionAction;
287	<	FTRParams           : TStrings;
288	<	FTRParamsChanged    : Boolean;
289	<	procedure EnsureNotInTransaction;
290	<	procedure EndTransaction(Action: TTransactionAction; Force: Boolean);
291	<	function GetDatabase(Index: Integer): TIBDatabase;
292	<	function GetDatabaseCount: Integer;
293	<	function GetSQLObject(Index: Integer): TIBBase;
294	<	function GetSQLObjectCount: Integer;
295	<	function GetInTransaction: Boolean;
296	<	function GetIdleTimer: Integer;
297	<	procedure BeforeDatabaseDisconnect(DB: TIBDatabase);
298	<	procedure SetActive(Value: Boolean);
299	<	procedure SetDefaultAction(Value: TTransactionAction);
300	<	procedure SetDefaultDatabase(Value: TIBDatabase);
301	<	procedure SetIdleTimer(Value: Integer);
302	<	procedure SetTRParams(Value: TStrings);
303	<	procedure TimeoutTransaction(Sender: TObject);
304	<	procedure TRParamsChange(Sender: TObject);
305	<	procedure TRParamsChanging(Sender: TObject);
306	<	function AddSQLObject(ds: TIBBase): Integer;
307	<	procedure RemoveSQLObject(Idx: Integer);
308	<	procedure RemoveSQLObjects;
309	<
310	<	protected
311	<	procedure Loaded; override;
312	<	procedure SetHandle(Value: TISC_TR_HANDLE);
313	<	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
314	<
315	<	public
316	<	constructor Create(AOwner: TComponent); override;
317	<	destructor Destroy; override;
318	<	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
319	<	procedure Commit;
320	<	procedure CommitRetaining;
321	<	procedure Rollback;
322	<	procedure RollbackRetaining;
323	<	procedure StartTransaction;
324	<	procedure CheckInTransaction;
325	<	procedure CheckNotInTransaction;
326	<
327	<	function AddDatabase(db: TIBDatabase): Integer;
328	<	function FindDatabase(db: TIBDatabase): Integer;
329	<	function FindDefaultDatabase: TIBDatabase;
330	<	procedure RemoveDatabase(Idx: Integer);
331	<	procedure RemoveDatabases;
332	<	procedure CheckDatabasesInList;
333	<
334	<	property DatabaseCount: Integer read GetDatabaseCount;
335	<	property Databases[Index: Integer]: TIBDatabase read GetDatabase;
336	<	property SQLObjectCount: Integer read GetSQLObjectCount;
337	<	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
338	<	property Handle: TISC_TR_HANDLE read FHandle;
339	<	property HandleIsShared: Boolean read FHandleIsShared;
340	<	property InTransaction: Boolean read GetInTransaction;
341	<	property TPB: PChar read FTPB;
342	<	property TPBLength: Short read FTPBLength;
343	<	published
344	<	property Active: Boolean read GetInTransaction write SetActive;
345	<	property DefaultDatabase: TIBDatabase read FDefaultDatabase
346	<	write SetDefaultDatabase;
347	<	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer default 0;
348	<	property DefaultAction: TTransactionAction read FDefaultAction write SetDefaultAction default taCommit;
349	<	property Params: TStrings read FTRParams write SetTRParams;
350	<	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
351	<	end;
352	<
353	<	{ TIBBase }
354	<
355	<	{ Virtually all components in IB are "descendents" of TIBBase.
356	<	It is to more easily manage the database and transaction
357	<	connections. }
358	<	TIBBase = class(TObject)
359	<	protected
360	<	FDatabase: TIBDatabase;
361	<	FIndexInDatabase: Integer;
362	<	FTransaction: TIBTransaction;
363	<	FIndexInTransaction: Integer;
364	<	FOwner: TObject;
365	<	FBeforeDatabaseDisconnect: TNotifyEvent;
366	<	FAfterDatabaseDisconnect: TNotifyEvent;
367	<	FOnDatabaseFree: TNotifyEvent;
368	<	FBeforeTransactionEnd: TNotifyEvent;
369	<	FAfterTransactionEnd: TNotifyEvent;
370	<	FOnTransactionFree: TNotifyEvent;
371	<
372	<	procedure DoBeforeDatabaseDisconnect; virtual;
373	<	procedure DoAfterDatabaseDisconnect; virtual;
374	<	procedure DoDatabaseFree; virtual;
375	<	procedure DoBeforeTransactionEnd; virtual;
376	<	procedure DoAfterTransactionEnd; virtual;
377	<	procedure DoTransactionFree; virtual;
378	<	function GetDBHandle: PISC_DB_HANDLE; virtual;
379	<	function GetTRHandle: PISC_TR_HANDLE; virtual;
380	<	procedure SetDatabase(Value: TIBDatabase); virtual;
381	<	procedure SetTransaction(Value: TIBTransaction); virtual;
382	<	public
383	<	constructor Create(AOwner: TObject);
384	<	destructor Destroy; override;
385	<	procedure CheckDatabase; virtual;
386	<	procedure CheckTransaction; virtual;
387	<	public
388	<	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
389	<	write FBeforeDatabaseDisconnect;
390	<	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
391	<	write FAfterDatabaseDisconnect;
392	<	property OnDatabaseFree: TNotifyEvent read FOnDatabaseFree write FOnDatabaseFree;
393	<	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd write FBeforeTransactionEnd;
394	<	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd write FAfterTransactionEnd;
395	<	property OnTransactionFree: TNotifyEvent read FOnTransactionFree write FOnTransactionFree;
396	<	property Database: TIBDatabase read FDatabase
397	<	write SetDatabase;
398	<	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
399	<	property Owner: TObject read FOwner;
400	<	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
401	<	property Transaction: TIBTransaction read FTransaction
402	<	write SetTransaction;
403	<	end;
404	<
405	<	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
406	<	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
407	<
408	<
409	<	implementation
410	<
411	<	uses IBIntf,{$IFDEF HAS_SQLMONITOR}IBSQLMonitor,{$ENDIF} IBCustomDataSet, IBDatabaseInfo, IBSQL, IBUtils, typInfo;
412	<
413	<	{ TIBDatabase }
414	<
415	<	constructor TIBDatabase.Create(AOwner: TComponent);
416	<	begin
417	<	inherited Create(AOwner);
418	<	FIBLoaded := False;
419	<	CheckIBLoaded;
420	<	FIBLoaded := True;
421	<	LoginPrompt := True;
422	<	FSQLObjects := TList.Create;
423	<	FTransactions := TList.Create;
424	<	FDBName := '';
425	<	FDBParams := TStringList.Create;
426	<	FDBParamsChanged := True;
427	<	TStringList(FDBParams).OnChange := DBParamsChange;
428	<	TStringList(FDBParams).OnChanging := DBParamsChanging;
429	<	FDPB := nil;
430	<	FHandle := nil;
431	<	FUserNames := nil;
432	<	FInternalTransaction := TIBTransaction.Create(self);
433	<	FInternalTransaction.DefaultDatabase := Self;
434	<	FTimer := TTimer.Create(Self);
435	<	FTimer.Enabled := False;
436	<	FTimer.Interval := 0;
437	<	FTimer.OnTimer := TimeoutConnection;
438	<	FDBSQLDialect := 1;
439	<	FSQLDialect := 3;
440	<	FTraceFlags := [];
441	<	FDataSets := TList.Create;
442	<	end;
443	<
444	<	destructor TIBDatabase.Destroy;
445	<	var
446	<	i: Integer;
447	<	begin
448	<	if FIBLoaded then
449	<	begin
450	<	IdleTimer := 0;
451	<	if FHandle <> nil then
452	<	ForceClose;
453	<	for i := 0 to FSQLObjects.Count - 1 do
454	<	if FSQLObjects[i] <> nil then
455	<	SQLObjects[i].DoDatabaseFree;
456	<	RemoveSQLObjects;
457	<	RemoveTransactions;
458	<	FInternalTransaction.Free;
459	<	FreeMem(FDPB);
460	<	FDPB := nil;
461	<	FDBParams.Free;
462	<	FSQLObjects.Free;
463	<	FUserNames.Free;
464	<	FTransactions.Free;
465	<	end;
466	<	FDataSets.Free;
467	<	inherited Destroy;
468	<	end;
469	<
470	<	function TIBDatabase.Call(ErrCode: ISC_STATUS;
471	<	RaiseError: Boolean): ISC_STATUS;
472	<	begin
473	<	result := ErrCode;
474	<	FCanTimeout := False;
475	<	if RaiseError and (ErrCode > 0) then
476	<	IBDataBaseError;
477	<	end;
478	<
479	<	procedure TIBDatabase.CheckActive;
480	<	begin
481	<	if StreamedConnected and (not Connected) then
482	<	Loaded;
483	<	if FHandle = nil then
484	<	IBError(ibxeDatabaseClosed, [nil]);
485	<	end;
486	<
487	<	procedure TIBDatabase.EnsureInactive;
488	<	begin
489	<	if csDesigning in ComponentState then
490	<	begin
491	<	if FHandle <> nil then
492	<	Close;
493	<	end
494	<	end;
495	<
496	<	procedure TIBDatabase.CheckInactive;
497	<	begin
498	<	if FHandle <> nil then
499	<	IBError(ibxeDatabaseOpen, [nil]);
500	<	end;
501	<
502	<	procedure TIBDatabase.CheckDatabaseName;
503	<	begin
504	<	if (FDBName = '') then
505	<	IBError(ibxeDatabaseNameMissing, [nil]);
506	<	end;
507	<
508	<	function TIBDatabase.AddSQLObject(ds: TIBBase): Integer;
509	<	begin
510	<	result := 0;
511	<	if (ds.Owner is TIBCustomDataSet) then
512	<	{$IFDEF LINUX}
513	<	FDataSets.Add(TDataSet(ds.Owner));
514	<	{$ELSE}
515	<	RegisterClient(TDataSet(ds.Owner));
516	<	{$ENDIF}
517	<	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
518	<	Inc(result);
519	<	if (result = FSQLObjects.Count) then
520	<	FSQLObjects.Add(ds)
521	<	else
522	<	FSQLObjects[result] := ds;
523	<	end;
524	<
525	<	function TIBDatabase.AddTransaction(TR: TIBTransaction): Integer;
526	<	begin
527	<	result := FindTransaction(TR);
528	<	if result <> -1 then
529	<	begin
530	<	result := -1;
531	<	exit;
532	<	end;
533	<	result := 0;
534	<	while (result < FTransactions.Count) and (FTransactions[result] <> nil) do
535	<	Inc(result);
536	<	if (result = FTransactions.Count) then
537	<	FTransactions.Add(TR)
538	<	else
539	<	FTransactions[result] := TR;
540	<	end;
541	<
542	<	procedure TIBDatabase.DoDisconnect;
543	<	begin
544	<	if Connected then
545	<	InternalClose(False);
546	<	FDBSQLDialect := 1;
547	<	end;
548	<
549	<	procedure TIBDatabase.CreateDatabase;
550	<	var
551	<	tr_handle: TISC_TR_HANDLE;
552	<	begin
553	<	CheckInactive;
554	<	tr_handle := nil;
555	<	Call(
556	<	isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0,
557	<	PChar('CREATE DATABASE ''' + FDBName + ''' ' + {do not localize}
558	<	Params.Text), SQLDialect, nil),
559	<	True);
560	<	end;
561	<
562	<	procedure TIBDatabase.DropDatabase;
563	<	begin
564	<	CheckActive;
565	<	Call(isc_drop_database(StatusVector, @FHandle), True);
566	<	end;
567	<
568	<	procedure TIBDatabase.DBParamsChange(Sender: TObject);
569	<	begin
570	<	FDBParamsChanged := True;
571	<	end;
572	<
573	<	procedure TIBDatabase.DBParamsChanging(Sender: TObject);
574	<	begin
575	<	EnsureInactive;
576	<	CheckInactive;
577	<	end;
578	<
579	<	function TIBDatabase.FindTransaction(TR: TIBTransaction): Integer;
580	<	var
581	<	i: Integer;
582	<	begin
583	<	result := -1;
584	<	for i := 0 to FTransactions.Count - 1 do
585	<	if TR = Transactions[i] then
586	<	begin
587	<	result := i;
588	<	break;
589	<	end;
590	<	end;
591	<
592	<	function TIBDatabase.FindDefaultTransaction(): TIBTransaction;
593	<	var
594	<	i: Integer;
595	<	begin
596	<	result := FDefaultTransaction;
597	<	if result = nil then
598	<	begin
599	<	for i := 0 to FTransactions.Count - 1 do
600	<	if (Transactions[i] <> nil) and
601	<	(TIBTransaction(Transactions[i]).DefaultDatabase = self) and
602	<	(TIBTransaction(Transactions[i]) <> FInternalTransaction) then
603	<	begin
604	<	result := TIBTransaction(Transactions[i]);
605	<	break;
606	<	end;
607	<	end;
608	<	end;
609	<
610	<	procedure TIBDatabase.ForceClose;
611	<	begin
612	<	if Connected then
613	<	InternalClose(True);
614	<	end;
615	<
616	<	function TIBDatabase.GetConnected: Boolean;
617	<	begin
618	<	result := FHandle <> nil;
619	<	end;
620	<
621	<	function TIBDatabase.GetSQLObject(Index: Integer): TIBBase;
622	<	begin
623	<	result := FSQLObjects[Index];
624	<	end;
625	<
626	<	function TIBDatabase.GetSQLObjectCount: Integer;
627	<	var
628	<	i: Integer;
629	<	begin
630	<	result := 0;
631	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
632	<	Inc(result);
633	<	end;
634	<
635	<	function TIBDatabase.GetDBParamByDPB(const Idx: Integer): String;
636	<	var
637	<	ConstIdx, EqualsIdx: Integer;
638	<	begin
639	<	if (Idx > 0) and (Idx <= isc_dpb_last_dpb_constant) then
640	<	begin
641	<	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
642	<	if ConstIdx = -1 then
643	<	result := ''
644	<	else
645	<	begin
646	<	result := Params[ConstIdx];
647	<	EqualsIdx := Pos('=', result); {mbcs ok}
648	<	if EqualsIdx = 0 then
649	<	result := ''
650	<	else
651	<	result := Copy(result, EqualsIdx + 1, Length(result));
652	<	end;
653	<	end
654	<	else
655	<	result := '';
656	<	end;
657	<
658	<	function TIBDatabase.GetIdleTimer: Integer;
659	<	begin
660	<	result := FTimer.Interval;
661	<	end;
662	<
663	<	function TIBDatabase.GetTransaction(Index: Integer): TIBTransaction;
664	<	begin
665	<	result := FTransactions[Index];
666	<	end;
667	<
668	<	function TIBDatabase.GetTransactionCount: Integer;
669	<	var
670	<	i: Integer;
671	<	begin
672	<	result := 0;
673	<	for i := 0 to FTransactions.Count - 1 do
674	<	if FTransactions[i] <> nil then
675	<	Inc(result);
676	<	end;
677	<
678	<	function TIBDatabase.IndexOfDBConst(st: String): Integer;
679	<	var
680	<	i, pos_of_str: Integer;
681	<	begin
682	<	result := -1;
683	<	for i := 0 to Params.Count - 1 do
684	<	begin
685	<	pos_of_str := Pos(st, AnsiLowerCase(Params[i])); {mbcs ok}
686	<	if (pos_of_str = 1) or (pos_of_str = Length(DPBPrefix) + 1) then
687	<	begin
688	<	result := i;
689	<	break;
690	<	end;
691	<	end;
692	<	end;
693	<
694	<	procedure TIBDatabase.InternalClose(Force: Boolean);
695	<	var
696	<	i: Integer;
697	<	begin
698	<	CheckActive;
699	<	{ Tell all connected transactions that we're disconnecting.
700	<	This is so transactions can commit/rollback, accordingly
701	<	}
702	<	for i := 0 to FTransactions.Count - 1 do
703	<	begin
704	<	try
705	<	if FTransactions[i] <> nil then
706	<	Transactions[i].BeforeDatabaseDisconnect(Self);
707	<	except
708	<	if not Force then
709	<	raise;
710	<	end;
711	<	end;
712	<	for i := 0 to FSQLObjects.Count - 1 do
713	<	begin
714	<	try
715	<	if FSQLObjects[i] <> nil then
716	<	SQLObjects[i].DoBeforeDatabaseDisconnect;
717	<	except
718	<	if not Force then
719	<	raise;
720	<	end;
721	<	end;
722	<
723	<	if (not HandleIsShared) and
724	<	(Call(isc_detach_database(StatusVector, @FHandle), False) > 0) and
725	<	(not Force) then
726	<	IBDataBaseError
727	<	else
728	<	begin
729	<	FHandle := nil;
730	<	FHandleIsShared := False;
731	<	end;
732	<
733	<	{$IFDEF HAS_SQLMONITOR}
734	<	if not (csDesigning in ComponentState) then
735	<	MonitorHook.DBDisconnect(Self);
736	<	{$ENDIF}
737	<
738	<	for i := 0 to FSQLObjects.Count - 1 do
739	<	if FSQLObjects[i] <> nil then
740	<	SQLObjects[i].DoAfterDatabaseDisconnect;
741	<	end;
742	<
743	<	procedure TIBDatabase.Loaded;
744	<	var
745	<	i: integer;
746	<	begin
747	<	try
748	<	if StreamedConnected and (not Connected) then
749	<	begin
750	<	inherited Loaded;
751	<	for i := 0 to FTransactions.Count - 1 do
752	<	if  FTransactions[i] <> nil then
753	<	begin
754	<	with TIBTransaction(FTransactions[i]) do
755	<	if not Active then
756	<	if FStreamedActive and not InTransaction then
757	<	begin
758	<	StartTransaction;
759	<	FStreamedActive := False;
760	<	end;
761	<	end;
762	<	if (FDefaultTransaction <> nil) and
763	<	(FDefaultTransaction.FStreamedActive) and
764	<	(not FDefaultTransaction.InTransaction) then
765	<	FDefaultTransaction.StartTransaction;
766	<	FStreamedConnected := False;
767	<	end;
768	<	except
769	<	if csDesigning in ComponentState then
770	<	Application.HandleException(Self)
771	<	else
772	<	raise;
773	<	end;
774	<	end;
775	<
776	<	procedure TIBDatabase.Notification( AComponent: TComponent;
777	<	Operation: TOperation);
778	<	var
779	<	i: Integer;
780	<	begin
781	<	inherited Notification( AComponent, Operation);
782	<	if (Operation = opRemove) and (AComponent = FDefaultTransaction) then
783	<	begin
784	<	i := FindTransaction(FDefaultTransaction);
785	<	if (i <> -1) then
786	<	RemoveTransaction(i);
787	<	FDefaultTransaction := nil;
788	<	end;
789	<	end;
790	<
791	<	function TIBDatabase.Login: Boolean;
792	<	var
793	<	IndexOfUser, IndexOfPassword: Integer;
794	<	Username, Password, OldPassword: String;
795	<	LoginParams: TStrings;
796	<
797	<	procedure HidePassword;
798	<	var
799	<	I: Integer;
800	<	IndexAt: Integer;
801	<	begin
802	<	IndexAt := 0;
803	<	for I := 0 to Params.Count -1 do
804	<	if Pos('password', LowerCase(Trim(Params.Names[i]))) = 1 then {mbcs ok}
805	<	begin
806	<	FHiddenPassword := Params.Values[Params.Names[i]];
807	<	IndexAt := I;
808	<	break;
809	<	end;
810	<	if IndexAt <> 0 then
811	<	Params.Delete(IndexAt);
812	<	end;
813	<
814	<	begin
815	<	if Assigned(FOnLogin) then
816	<	begin
817	<	result := True;
818	<	LoginParams := TStringList.Create;
819	<	try
820	<	LoginParams.Assign(Params);
821	<	FOnLogin(Self, LoginParams);
822	<	Params.Assign (LoginParams);
823	<	HidePassword;
824	<	finally
825	<	LoginParams.Free;
826	<	end;
827	<	end
828	<	else
829	<	begin
830	<	IndexOfUser := IndexOfDBConst(DPBConstantNames[isc_dpb_user_name]);
831	<	if IndexOfUser <> -1 then
832	<	Username := Copy(Params[IndexOfUser],
833	<	Pos('=', Params[IndexOfUser]) + 1, {mbcs ok}
834	<	Length(Params[IndexOfUser]));
835	<	IndexOfPassword := IndexOfDBConst(DPBConstantNames[isc_dpb_password]);
836	<	if IndexOfPassword <> -1 then
837	<	begin
838	<	Password := Copy(Params[IndexOfPassword],
839	<	Pos('=', Params[IndexOfPassword]) + 1, {mbcs ok}
840	<	Length(Params[IndexOfPassword]));
841	<	OldPassword := password;
842	<	end;
843	<	result := LoginDialogEx(DatabaseName, Username, Password, False);
844	<	if result then
845	<	begin
846	<	if IndexOfUser = -1 then
847	<	Params.Add(DPBConstantNames[isc_dpb_user_name] + '=' + Username)
848	<	else
849	<	Params[IndexOfUser] := DPBConstantNames[isc_dpb_user_name] +
850	<	'=' + Username;
851	<	if (Password = OldPassword) then
852	<	FHiddenPassword := ''
853	<	else
854	<	begin
855	<	FHiddenPassword := Password;
856	<	if OldPassword <> '' then
857	<	HidePassword;
858	<	end;
859	<	end;
860	<	end;
861	<	end;
862	<
863	<	procedure TIBDatabase.DoConnect;
864	<	var
865	<	DPB: String;
866	<	TempDBParams: TStrings;
867	<
868	<	begin
869	<	CheckInactive;
870	<	CheckDatabaseName;
871	<	if (not LoginPrompt) and (FHiddenPassword <> '') then
872	<	begin
873	<	FHiddenPassword := '';
874	<	FDBParamsChanged := True;
875	<	end;
876	<	{ Use builtin login prompt if requested }
877	<	if LoginPrompt and not Login then
878	<	IBError(ibxeOperationCancelled, [nil]);
879	<	{ Generate a new DPB if necessary }
880	<	if (FDBParamsChanged) then
881	<	begin
882	<	FDBParamsChanged := False;
883	<	if (not LoginPrompt) or (FHiddenPassword = '') then
884	<	GenerateDPB(FDBParams, DPB, FDPBLength)
885	<	else
886	<	begin
887	<	TempDBParams := TStringList.Create;
888	<	try
889	<	TempDBParams.Assign(FDBParams);
890	<	TempDBParams.Add('password=' + FHiddenPassword);
891	<	GenerateDPB(TempDBParams, DPB, FDPBLength);
892	<	finally
893	<	TempDBParams.Free;
894	<	end;
895	<	end;
896	<	IBAlloc(FDPB, 0, FDPBLength);
897	<	Move(DPB[1], FDPB[0], FDPBLength);
898	<	end;
899	<	if Call(isc_attach_database(StatusVector, Length(FDBName),
900	<	PChar(FDBName), @FHandle,
901	<	FDPBLength, FDPB), False) > 0 then
902	<	begin
903	<	FHandle := nil;
904	<	IBDataBaseError;
905	<	end;
906	<	FDBSQLDialect := GetDBSQLDialect;
907	<	ValidateClientSQLDialect;
908	<	{$IFDEF HAS_SQLMONITOR}
909	<	if not (csDesigning in ComponentState) then
910	<	MonitorHook.DBConnect(Self);
911	<	{$ENDIF}
912	<	end;
913	<
914	<	procedure TIBDatabase.RemoveSQLObject(Idx: Integer);
915	<	var
916	<	ds: TIBBase;
917	<	begin
918	<	if (Idx >= 0) and (FSQLObjects[Idx] <> nil) then
919	<	begin
920	<	ds := SQLObjects[Idx];
921	<	FSQLObjects[Idx] := nil;
922	<	ds.Database := nil;
923	<	if (ds.owner is TDataSet) then
924	<	{$IFDEF LINUX}
925	<	FDataSets.Remove(TDataSet(ds.Owner));
926	<	{$ELSE}
927	<	UnregisterClient(TDataSet(ds.Owner));
928	<	{$ENDIF}
929	<	end;
930	<	end;
931	<
932	<	procedure TIBDatabase.RemoveSQLObjects;
933	<	var
934	<	i: Integer;
935	<	begin
936	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
937	<	begin
938	<	RemoveSQLObject(i);
939	<	if (TIBBase(FSQLObjects[i]).owner is TDataSet) then
940	<	{$IFDEF LINUX}
941	<	FDataSets.Remove(TDataSet(TIBBase(FSQLObjects[i]).owner));
942	<	{$ELSE}
943	<	UnregisterClient(TDataSet(TIBBase(FSQLObjects[i]).owner));
944	<	{$ENDIF}
945	<	end;
946	<	end;
947	<
948	<	procedure TIBDatabase.RemoveTransaction(Idx: Integer);
949	<	var
950	<	TR: TIBTransaction;
951	<	begin
952	<	if ((Idx >= 0) and (FTransactions[Idx] <> nil)) then
953	<	begin
954	<	TR := Transactions[Idx];
955	<	FTransactions[Idx] := nil;
956	<	TR.RemoveDatabase(TR.FindDatabase(Self));
957	<	if TR = FDefaultTransaction then
958	<	FDefaultTransaction := nil;
959	<	end;
960	<	end;
961	<
962	<	procedure TIBDatabase.RemoveTransactions;
963	<	var
964	<	i: Integer;
965	<	begin
966	<	for i := 0 to FTransactions.Count - 1 do if FTransactions[i] <> nil then
967	<	RemoveTransaction(i);
968	<	end;
969	<
970	<	procedure TIBDatabase.SetDatabaseName(const Value: TIBFileName);
971	<	begin
972	<	if FDBName <> Value then
973	<	begin
974	<	EnsureInactive;
975	<	CheckInactive;
976	<	FDBName := Value;
977	<	end;
978	<	end;
979	<
980	<	procedure TIBDatabase.SetDBParamByDPB(const Idx: Integer; Value: String);
981	<	var
982	<	ConstIdx: Integer;
983	<	begin
984	<	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
985	<	if (Value = '') then
986	<	begin
987	<	if ConstIdx <> -1 then
988	<	Params.Delete(ConstIdx);
989	<	end
990	<	else
991	<	begin
992	<	if (ConstIdx = -1) then
993	<	Params.Add(DPBConstantNames[Idx] + '=' + Value)
994	<	else
995	<	Params[ConstIdx] := DPBConstantNames[Idx] + '=' + Value;
996	<	end;
997	<	end;
998	<
999	<	procedure TIBDatabase.SetDBParams(Value: TStrings);
1000	<	begin
1001	<	FDBParams.Assign(Value);
1002	<	end;
1003	<
1004	<	procedure TIBDatabase.SetDefaultTransaction(Value: TIBTransaction);
1005	<	var
1006	<	i: Integer;
1007	<	begin
1008	<	if (FDefaultTransaction <> nil) and (FDefaultTransaction <> Value) then
1009	<	begin
1010	<	i := FindTransaction(FDefaultTransaction);
1011	<	if (i <> -1) and (FDefaultTransaction.DefaultDatabase <> self) then
1012	<	RemoveTransaction(i);
1013	<	end;
1014	<	if (Value <> nil) and (FDefaultTransaction <> Value) then
1015	<	begin
1016	<	Value.AddDatabase(Self);
1017	<	AddTransaction(Value);
1018	<	end;
1019	<	FDefaultTransaction := Value;
1020	<	end;
1021	<
1022	<	procedure TIBDatabase.SetHandle(Value: TISC_DB_HANDLE);
1023	<	begin
1024	<	if HandleIsShared then
1025	<	Close
1026	<	else
1027	<	CheckInactive;
1028	<	FHandle := Value;
1029	<	FHandleIsShared := (Value <> nil);
1030	<	end;
1031	<
1032	<	procedure TIBDatabase.SetIdleTimer(Value: Integer);
1033	<	begin
1034	<	if Value < 0 then
1035	<	IBError(ibxeTimeoutNegative, [nil])
1036	<	else
1037	<	if (Value = 0) then
1038	<	begin
1039	<	FTimer.Enabled := False;
1040	<	FTimer.Interval := 0;
1041	<	end
1042	<	else
1043	<	if (Value > 0) then
1044	<	begin
1045	<	FTimer.Interval := Value;
1046	<	if not (csDesigning in ComponentState) then
1047	<	FTimer.Enabled := True;
1048	<	end;
1049	<	end;
1050	<
1051	<	function TIBDatabase.TestConnected: Boolean;
1052	<	var
1053	<	DatabaseInfo: TIBDatabaseInfo;
1054	<	begin
1055	<	result := Connected;
1056	<	if result then
1057	<	begin
1058	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1059	<	try
1060	<	DatabaseInfo.Database := self;
1061	<	{ poke the server to see if connected }
1062	<	if DatabaseInfo.BaseLevel = 0 then ;
1063	<	DatabaseInfo.Free;
1064	<	except
1065	<	ForceClose;
1066	<	result := False;
1067	<	DatabaseInfo.Free;
1068	<	end;
1069	<	end;
1070	<	end;
1071	<
1072	<	procedure TIBDatabase.TimeoutConnection(Sender: TObject);
1073	<	begin
1074	<	if Connected then
1075	<	begin
1076	<	if FCanTimeout then
1077	<	begin
1078	<	ForceClose;
1079	<	if Assigned(FOnIdleTimer) then
1080	<	FOnIdleTimer(Self);
1081	<	end
1082	<	else
1083	<	FCanTimeout := True;
1084	<	end;
1085	<	end;
1086	<
1087	<	function TIBDatabase.GetIsReadOnly: Boolean;
1088	<	var
1089	<	DatabaseInfo: TIBDatabaseInfo;
1090	<	begin
1091	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1092	<	DatabaseInfo.Database := self;
1093	<	if (DatabaseInfo.ODSMajorVersion < 10) then
1094	<	result := false
1095	<	else
1096	<	begin
1097	<	if (DatabaseInfo.ReadOnly = 0) then
1098	<	result := false
1099	<	else
1100	<	result := true;
1101	<	end;
1102	<	DatabaseInfo.Free;
1103	<	end;
1104	<
1105	<	function TIBDatabase.GetSQLDialect: Integer;
1106	<	begin
1107	<	Result := FSQLDialect;
1108	<	end;
1109	<
1110	<	procedure TIBDatabase.SetSQLDialect(const Value: Integer);
1111	<	begin
1112	<	if (Value < 1) then IBError(ibxeSQLDialectInvalid, [nil]);
1113	<	if ((FHandle = nil) or (Value <= FDBSQLDialect))  then
1114	<	FSQLDialect := Value
1115	<	else
1116	<	IBError(ibxeSQLDialectInvalid, [nil]);
1117	<	end;
1118	<
1119	<	function TIBDatabase.GetDBSQLDialect: Integer;
1120	<	var
1121	<	DatabaseInfo: TIBDatabaseInfo;
1122	<	begin
1123	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1124	<	DatabaseInfo.Database := self;
1125	<	result := DatabaseInfo.DBSQLDialect;
1126	<	DatabaseInfo.Free;
1127	<	end;
1128	<
1129	<	procedure TIBDatabase.ValidateClientSQLDialect;
1130	<	begin
1131	<	if (FDBSQLDialect < FSQLDialect) then
1132	<	begin
1133	<	FSQLDialect := FDBSQLDialect;
1134	<	if Assigned (FOnDialectDowngradeWarning) then
1135	<	FOnDialectDowngradeWarning(self);
1136	<	end;
1137	<	end;
1138	<
1139	<	procedure TIBDatabase.ApplyUpdates(const DataSets: array of TDataSet);
1140	<	var
1141	<	I: Integer;
1142	<	DS: TIBCustomDataSet;
1143	<	TR: TIBTransaction;
1144	<	begin
1145	<	TR := nil;
1146	<	for I := 0 to High(DataSets) do
1147	<	begin
1148	<	DS := TIBCustomDataSet(DataSets[I]);
1149	<	if DS.Database <> Self then
1150	<	IBError(ibxeUpdateWrongDB, [nil]);
1151	<	if TR = nil then
1152	<	TR := DS.Transaction;
1153	<	if (DS.Transaction <> TR) or (TR = nil) then
1154	<	IBError(ibxeUpdateWrongTR, [nil]);
1155	<	end;
1156	<	TR.CheckInTransaction;
1157	<	for I := 0 to High(DataSets) do
1158	<	begin
1159	<	DS := TIBCustomDataSet(DataSets[I]);
1160	<	DS.ApplyUpdates;
1161	<	end;
1162	<	TR.CommitRetaining;
1163	<	end;
1164	<
1165	<	procedure TIBDatabase.CloseDataSets;
1166	<	var
1167	<	i: Integer;
1168	<	begin
1169	<	for i := 0 to DataSetCount - 1 do
1170	<	if (DataSets[i] <> nil) then
1171	<	DataSets[i].close;
1172	<	end;
1173	<
1174	<	function TIBDatabase.GetDataset(Index : longint) : TDataset;
1175	<	begin
1176	<	if (Index >= 0) and (Index < FDataSets.Count) then
1177	<	Result := TDataSet(FDataSets[Index])
1178	<	else
1179	<	raise Exception.Create('Invalid Index to DataSets');
1180	<	end;
1181	<
1182	<	function TIBDatabase.GetDataSetCount : Longint;
1183	<	begin
1184	<	Result := FDataSets.Count;
1185	<	end;
1186	<
1187	<	procedure TIBDatabase.GetFieldNames(const TableName: string; List: TStrings);
1188	<	var
1189	<	Query: TIBSQL;
1190	<	begin
1191	<	if TableName = '' then
1192	<	IBError(ibxeNoTableName, [nil]);
1193	<	if not Connected then
1194	<	Open;
1195	<	if not FInternalTransaction.Active then
1196	<	FInternalTransaction.StartTransaction;
1197	<	Query := TIBSQL.Create(self);
1198	<	try
1199	<	Query.GoToFirstRecordOnExecute := False;
1200	<	Query.Database := Self;
1201	<	Query.Transaction := FInternalTransaction;
1202	<	Query.SQL.Text := 'Select R.RDB$FIELD_NAME ' + {do not localize}
1203	<	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
1204	<	'where R.RDB$RELATION_NAME = ' + {do not localize}
1205	<	'''' +
1206	<	FormatIdentifierValue(SQLDialect, TableName) +
1207	<	''' ' +
1208	<	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '; {do not localize}
1209	<	Query.Prepare;
1210	<	Query.ExecQuery;
1211	<	with List do
1212	<	begin
1213	<	BeginUpdate;
1214	<	try
1215	<	Clear;
1216	<	while (not Query.EOF) and (Query.Next <> nil) do
1217	<	List.Add(TrimRight(Query.Current.ByName('RDB$FIELD_NAME').AsString)); {do not localize}
1218	<	finally
1219	<	EndUpdate;
1220	<	end;
1221	<	end;
1222	<	finally
1223	<	Query.free;
1224	<	FInternalTransaction.Commit;
1225	<	end;
1226	<	end;
1227	<
1228	<	procedure TIBDatabase.GetTableNames(List: TStrings; SystemTables: Boolean);
1229	<	var
1230	<	Query : TIBSQL;
1231	<	begin
1232	<	if not (csReading in ComponentState) then
1233	<	begin
1234	<	if not Connected then
1235	<	Open;
1236	<	if not FInternalTransaction.Active then
1237	<	FInternalTransaction.StartTransaction;
1238	<	Query := TIBSQL.Create(self);
1239	<	try
1240	<	Query.GoToFirstRecordOnExecute := False;
1241	<	Query.Database := Self;
1242	<	Query.Transaction := FInternalTransaction;
1243	<	if SystemTables then
1244	<	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1245	<	' where RDB$VIEW_BLR is NULL' {do not localize}
1246	<	else
1247	<	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1248	<	' where RDB$VIEW_BLR is NULL and RDB$SYSTEM_FLAG = 0'; {do not localize}
1249	<	Query.Prepare;
1250	<	Query.ExecQuery;
1251	<	with List do
1252	<	begin
1253	<	BeginUpdate;
1254	<	try
1255	<	Clear;
1256	<	while (not Query.EOF) and (Query.Next <> nil) do
1257	<	List.Add(TrimRight(Query.Current[0].AsString));
1258	<	finally
1259	<	EndUpdate;
1260	<	end;
1261	<	end;
1262	<	finally
1263	<	Query.Free;
1264	<	FInternalTransaction.Commit;
1265	<	end;
1266	<	end;
1267	<	end;
1268	<
1269	<	{ TIBTransaction }
1270	<
1271	<	constructor TIBTransaction.Create(AOwner: TComponent);
1272	<	begin
1273	<	inherited Create(AOwner);
1274	<	FIBLoaded := False;
1275	<	CheckIBLoaded;
1276	<	FIBLoaded := True;
1277	<	CheckIBLoaded;
1278	<	FDatabases := TList.Create;
1279	<	FSQLObjects := TList.Create;
1280	<	FHandle := nil;
1281	<	FTPB := nil;
1282	<	FTPBLength := 0;
1283	<	FTRParams := TStringList.Create;
1284	<	FTRParamsChanged := True;
1285	<	TStringList(FTRParams).OnChange := TRParamsChange;
1286	<	TStringList(FTRParams).OnChanging := TRParamsChanging;
1287	<	FTimer := TTimer.Create(Self);
1288	<	FTimer.Enabled := False;
1289	<	FTimer.Interval := 0;
1290	<	FTimer.OnTimer := TimeoutTransaction;
1291	<	FDefaultAction := taCommit;
1292	<	end;
1293	<
1294	<	destructor TIBTransaction.Destroy;
1295	<	var
1296	<	i: Integer;
1297	<	begin
1298	<	if FIBLoaded then
1299	<	begin
1300	<	if InTransaction then
1301	<	EndTransaction(FDefaultAction, True);
1302	<	for i := 0 to FSQLObjects.Count - 1 do
1303	<	if FSQLObjects[i] <> nil then
1304	<	SQLObjects[i].DoTransactionFree;
1305	<	RemoveSQLObjects;
1306	<	RemoveDatabases;
1307	<	FreeMem(FTPB);
1308	<	FTPB := nil;
1309	<	FTRParams.Free;
1310	<	FSQLObjects.Free;
1311	<	FDatabases.Free;
1312	<	end;
1313	<	inherited Destroy;
1314	<	end;
1315	<
1316	<	function TIBTransaction.Call(ErrCode: ISC_STATUS;
1317	<	RaiseError: Boolean): ISC_STATUS;
1318	<	var
1319	<	i: Integer;
1320	<	begin
1321	<	result := ErrCode;
1322	<	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1323	<	Databases[i].FCanTimeout := False;
1324	<	FCanTimeout := False;
1325	<	if RaiseError and (result > 0) then
1326	<	IBDataBaseError;
1327	<	end;
1328	<
1329	<	procedure TIBTransaction.CheckDatabasesInList;
1330	<	begin
1331	<	if GetDatabaseCount = 0 then
1332	<	IBError(ibxeNoDatabasesInTransaction, [nil]);
1333	<	end;
1334	<
1335	<	procedure TIBTransaction.CheckInTransaction;
1336	<	begin
1337	<	if FStreamedActive and (not InTransaction) then
1338	<	Loaded;
1339	<	if (FHandle = nil) then
1340	<	IBError(ibxeNotInTransaction, [nil]);
1341	<	end;
1342	<
1343	<	procedure TIBTransaction.EnsureNotInTransaction;
1344	<	begin
1345	<	if csDesigning in ComponentState then
1346	<	begin
1347	<	if FHandle <> nil then
1348	<	Rollback;
1349	<	end;
1350	<	end;
1351	<
1352	<	procedure TIBTransaction.CheckNotInTransaction;
1353	<	begin
1354	<	if (FHandle <> nil) then
1355	<	IBError(ibxeInTransaction, [nil]);
1356	<	end;
1357	<
1358	<	function TIBTransaction.AddDatabase(db: TIBDatabase): Integer;
1359	<	var
1360	<	i: Integer;
1361	<	NilFound: Boolean;
1362	<	begin
1363	<	i := FindDatabase(db);
1364	<	if i <> -1 then
1365	<	begin
1366	<	result := i;
1367	<	exit;
1368	<	end;
1369	<	NilFound := False;
1370	<	i := 0;
1371	<	while (not NilFound) and (i < FDatabases.Count) do
1372	<	begin
1373	<	NilFound := (FDatabases[i] = nil);
1374	<	if (not NilFound) then
1375	<	Inc(i);
1376	<	end;
1377	<	if (NilFound) then
1378	<	begin
1379	<	FDatabases[i] := db;
1380	<	result := i;
1381	<	end
1382	<	else
1383	<	begin
1384	<	result := FDatabases.Count;
1385	<	FDatabases.Add(db);
1386	<	end;
1387	<	end;
1388	<
1389	<	function TIBTransaction.AddSQLObject(ds: TIBBase): Integer;
1390	<	begin
1391	<	result := 0;
1392	<	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
1393	<	Inc(result);
1394	<	if (result = FSQLObjects.Count) then
1395	<	FSQLObjects.Add(ds)
1396	<	else
1397	<	FSQLObjects[result] := ds;
1398	<	end;
1399	<
1400	<	procedure TIBTransaction.Commit;
1401	<	begin
1402	<	EndTransaction(TACommit, False);
1403	<	end;
1404	<
1405	<	procedure TIBTransaction.CommitRetaining;
1406	<	begin
1407	<	EndTransaction(TACommitRetaining, False);
1408	<	end;
1409	<
1410	<	procedure TIBTransaction.EndTransaction(Action: TTransactionAction;
1411	<	Force: Boolean);
1412	<	var
1413	<	status: ISC_STATUS;
1414	<	i: Integer;
1415	<	begin
1416	<	CheckInTransaction;
1417	<	case Action of
1418	<	TARollback, TACommit:
1419	<	begin
1420	<	if (HandleIsShared) and
1421	<	(Action <> FDefaultAction) and
1422	<	(not Force) then
1423	<	IBError(ibxeCantEndSharedTransaction, [nil]);
1424	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1425	<	SQLObjects[i].DoBeforeTransactionEnd;
1426	<	if InTransaction then
1427	<	begin
1428	<	if HandleIsShared then
1429	<	begin
1430	<	FHandle := nil;
1431	<	FHandleIsShared := False;
1432	<	status := 0;
1433	<	end
1434	<	else
1435	<	if (Action = TARollback) then
1436	<	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False)
1437	<	else
1438	<	status := Call(isc_commit_transaction(StatusVector, @FHandle), False);
1439	<	if ((Force) and (status > 0)) then
1440	<	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False);
1441	<	if Force then
1442	<	FHandle := nil
1443	<	else
1444	<	if (status > 0) then
1445	<	IBDataBaseError;
1446	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1447	<	SQLObjects[i].DoAfterTransactionEnd;
1448	<	end;
1449	<	end;
1450	<	TACommitRetaining:
1451	<	Call(isc_commit_retaining(StatusVector, @FHandle), True);
1452	<	TARollbackRetaining:
1453	<	Call(isc_rollback_retaining(StatusVector, @FHandle), True);
1454	<	end;
1455	<	{$IFDEF HAS_SQLMONITOR}
1456	<	if not (csDesigning in ComponentState) then
1457	<	begin
1458	<	case Action of
1459	<	TACommit:
1460	<	MonitorHook.TRCommit(Self);
1461	<	TARollback:
1462	<	MonitorHook.TRRollback(Self);
1463	<	TACommitRetaining:
1464	<	MonitorHook.TRCommitRetaining(Self);
1465	<	TARollbackRetaining:
1466	<	MonitorHook.TRRollbackRetaining(Self);
1467	<	end;
1468	<	end;
1469	<	{$ENDIF}
1470	<	end;
1471	<
1472	<	function TIBTransaction.GetDatabase(Index: Integer): TIBDatabase;
1473	<	begin
1474	<	result := FDatabases[Index];
1475	<	end;
1476	<
1477	<	function TIBTransaction.GetDatabaseCount: Integer;
1478	<	var
1479	<	i, Cnt: Integer;
1480	<	begin
1481	<	result := 0;
1482	<	Cnt := FDatabases.Count - 1;
1483	<	for i := 0 to Cnt do if FDatabases[i] <> nil then
1484	<	Inc(result);
1485	<	end;
1486	<
1487	<	function TIBTransaction.GetSQLObject(Index: Integer): TIBBase;
1488	<	begin
1489	<	result := FSQLObjects[Index];
1490	<	end;
1491	<
1492	<	function TIBTransaction.GetSQLObjectCount: Integer;
1493	<	var
1494	<	i, Cnt: Integer;
1495	<	begin
1496	<	result := 0;
1497	<	Cnt := FSQLObjects.Count - 1;
1498	<	for i := 0 to Cnt do if FSQLObjects[i] <> nil then
1499	<	Inc(result);
1500	<	end;
1501	<
1502	<	function TIBTransaction.GetInTransaction: Boolean;
1503	<	begin
1504	<	result := (FHandle <> nil);
1505	<	end;
1506	<
1507	<	function TIBTransaction.FindDatabase(db: TIBDatabase): Integer;
1508	<	var
1509	<	i: Integer;
1510	<	begin
1511	<	result := -1;
1512	<	for i := 0 to FDatabases.Count - 1 do
1513	<	if db = TIBDatabase(FDatabases[i]) then
1514	<	begin
1515	<	result := i;
1516	<	break;
1517	<	end;
1518	<	end;
1519	<
1520	<	function TIBTransaction.FindDefaultDatabase: TIBDatabase;
1521	<	var
1522	<	i: Integer;
1523	<	begin
1524	<	result := FDefaultDatabase;
1525	<	if result = nil then
1526	<	begin
1527	<	for i := 0 to FDatabases.Count - 1 do
1528	<	if (TIBDatabase(FDatabases[i]) <> nil) and
1529	<	(TIBDatabase(FDatabases[i]).DefaultTransaction = self) then
1530	<	begin
1531	<	result := TIBDatabase(FDatabases[i]);
1532	<	break;
1533	<	end;
1534	<	end;
1535	<	end;
1536	<
1537	<
1538	<	function TIBTransaction.GetIdleTimer: Integer;
1539	<	begin
1540	<	result := FTimer.Interval;
1541	<	end;
1542	<
1543	<	procedure TIBTransaction.Loaded;
1544	<	begin
1545	<	inherited Loaded;
1546	<	end;
1547	<
1548	<	procedure TIBTransaction.BeforeDatabaseDisconnect(DB: TIBDatabase);
1549	<	begin
1550	<	if InTransaction then
1551	<	EndTransaction(FDefaultAction, True);
1552	<	end;
1553	<
1554	<	procedure TIBTransaction.RemoveDatabase(Idx: Integer);
1555	<	var
1556	<	DB: TIBDatabase;
1557	<	begin
1558	<	if ((Idx >= 0) and (FDatabases[Idx] <> nil)) then
1559	<	begin
1560	<	DB := Databases[Idx];
1561	<	FDatabases[Idx] := nil;
1562	<	DB.RemoveTransaction(DB.FindTransaction(Self));
1563	<	if DB = FDefaultDatabase then
1564	<	FDefaultDatabase := nil;
1565	<	end;
1566	<	end;
1567	<
1568	<	procedure TIBTransaction.RemoveDatabases;
1569	<	var
1570	<	i: Integer;
1571	<	begin
1572	<	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1573	<	RemoveDatabase(i);
1574	<	end;
1575	<
1576	<	procedure TIBTransaction.RemoveSQLObject(Idx: Integer);
1577	<	var
1578	<	ds: TIBBase;
1579	<	begin
1580	<	if ((Idx >= 0) and (FSQLObjects[Idx] <> nil)) then
1581	<	begin
1582	<	ds := SQLObjects[Idx];
1583	<	FSQLObjects[Idx] := nil;
1584	<	ds.Transaction := nil;
1585	<	end;
1586	<	end;
1587	<
1588	<	procedure TIBTransaction.RemoveSQLObjects;
1589	<	var
1590	<	i: Integer;
1591	<	begin
1592	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1593	<	RemoveSQLObject(i);
1594	<	end;
1595	<
1596	<	procedure TIBTransaction.Rollback;
1597	<	begin
1598	<	EndTransaction(TARollback, False);
1599	<	end;
1600	<
1601	<	procedure TIBTransaction.RollbackRetaining;
1602	<	begin
1603	<	EndTransaction(TARollbackRetaining, False);
1604	<	end;
1605	<
1606	<	procedure TIBTransaction.SetActive(Value: Boolean);
1607	<	begin
1608	<	if csReading in ComponentState then
1609	<	FStreamedActive := Value
1610	<	else
1611	<	if Value and not InTransaction then
1612	<	StartTransaction
1613	<	else
1614	<	if not Value and InTransaction then
1615	<	Rollback;
1616	<	end;
1617	<
1618	<	procedure TIBTransaction.SetDefaultAction(Value: TTransactionAction);
1619	<	begin
1620	<	(*  if (Value = taRollbackRetaining) and (GetIBClientVersion < 6) then
1621	<	IBError(ibxeIB60feature, [nil]);*)
1622	<	FDefaultAction := Value;
1623	<	end;
1624	<
1625	<	procedure TIBTransaction.SetDefaultDatabase(Value: TIBDatabase);
1626	<	var
1627	<	i: integer;
1628	<	begin
1629	<	if (FDefaultDatabase <> nil) and (FDefaultDatabase <> Value) then
1630	<	begin
1631	<	i := FDefaultDatabase.FindTransaction(self);
1632	<	if (i <> -1) then
1633	<	FDefaultDatabase.RemoveTransaction(i);
1634	<	end;
1635	<	if (Value <> nil) and (FDefaultDatabase <> Value) then
1636	<	begin
1637	<	Value.AddTransaction(Self);
1638	<	AddDatabase(Value);
1639	<	for i := 0 to FSQLObjects.Count - 1 do
1640	<	if (FSQLObjects[i] <> nil) and
1641	<	(TIBBase(FSQLObjects[i]).Database = nil) then
1642	<	SetOrdProp(TIBBase(FSQLObjects[i]).Owner, 'Database', Integer(Value));
1643	<	end;
1644	<	FDefaultDatabase := Value;
1645	<	end;
1646	<
1647	<	procedure TIBTransaction.SetHandle(Value: TISC_TR_HANDLE);
1648	<	begin
1649	<	if (HandleIsShared) then
1650	<	EndTransaction(DefaultAction, True)
1651	<	else
1652	<	CheckNotInTransaction;
1653	<	FHandle := Value;
1654	<	FHandleIsShared := (Value <> nil);
1655	<	end;
1656	<
1657	<	procedure TIBTransaction.Notification( AComponent: TComponent;
1658	<	Operation: TOperation);
1659	<	var
1660	<	i: Integer;
1661	<	begin
1662	<	inherited Notification( AComponent, Operation);
1663	<	if (Operation = opRemove) and (AComponent = FDefaultDatabase) then
1664	<	begin
1665	<	i := FindDatabase(FDefaultDatabase);
1666	<	if (i <> -1) then
1667	<	RemoveDatabase(i);
1668	<	FDefaultDatabase := nil;
1669	<	end;
1670	<	end;
1671	<
1672	<	procedure TIBTransaction.SetIdleTimer(Value: Integer);
1673	<	begin
1674	<	if Value < 0 then
1675	<	IBError(ibxeTimeoutNegative, [nil])
1676	<	else
1677	<	if (Value = 0) then
1678	<	begin
1679	<	FTimer.Enabled := False;
1680	<	FTimer.Interval := 0;
1681	<	end
1682	<	else
1683	<	if (Value > 0) then
1684	<	begin
1685	<	FTimer.Interval := Value;
1686	<	if not (csDesigning in ComponentState) then
1687	<	FTimer.Enabled := True;
1688	<	end;
1689	<	end;
1690	<
1691	<	procedure TIBTransaction.SetTRParams(Value: TStrings);
1692	<	begin
1693	<	FTRParams.Assign(Value);
1694	<	end;
1695	<
1696	<	procedure TIBTransaction.StartTransaction;
1697	<	var
1698	<	pteb: PISC_TEB_ARRAY;
1699	<	TPB: String;
1700	<	i: Integer;
1701	<	begin
1702	<	CheckNotInTransaction;
1703	<	CheckDatabasesInList;
1704	<	for i := 0 to FDatabases.Count - 1 do
1705	<	if  FDatabases[i] <> nil then
1706	<	begin
1707	<	with TIBDatabase(FDatabases[i]) do
1708	<	if not Connected then
1709	<	if FStreamedConnected then
1710	<	begin
1711	<	Open;
1712	<	FStreamedConnected := False;
1713	<	end
1714	<	else
1715	<	IBError(ibxeDatabaseClosed, [nil]);
1716	<	end;
1717	<	if FTRParamsChanged then
1718	<	begin
1719	<	FTRParamsChanged := False;
1720	<	GenerateTPB(FTRParams, TPB, FTPBLength);
1721	<	if FTPBLength > 0 then
1722	<	begin
1723	<	IBAlloc(FTPB, 0, FTPBLength);
1724	<	Move(TPB[1], FTPB[0], FTPBLength);
1725	<	end;
1726	<	end;
1727	<
1728	<	pteb := nil;
1729	<	IBAlloc(pteb, 0, DatabaseCount * SizeOf(TISC_TEB));
1730	<	try
1731	<	for i := 0 to DatabaseCount - 1 do if Databases[i] <> nil then
1732	<	begin
1733	<	pteb^[i].db_handle := @(Databases[i].Handle);
1734	<	pteb^[i].tpb_length := FTPBLength;
1735	<	pteb^[i].tpb_address := FTPB;
1736	<	end;
1737	<	if Call(isc_start_multiple(StatusVector, @FHandle,
1738	<	DatabaseCount, PISC_TEB(pteb)), False) > 0 then
1739	<	begin
1740	<	FHandle := nil;
1741	<	IBDataBaseError;
1742	<	end;
1743	<	{$IFDEF HAS_SQLMONITOR}
1744	<	if not (csDesigning in ComponentState) then
1745	<	MonitorHook.TRStart(Self);
1746	<	{$ENDIF}
1747	<	finally
1748	<	FreeMem(pteb);
1749	<	end;
1750	<	end;
1751	<
1752	<	procedure TIBTransaction.TimeoutTransaction(Sender: TObject);
1753	<	begin
1754	<	if InTransaction then
1755	<	begin
1756	<	if FCanTimeout then
1757	<	begin
1758	<	EndTransaction(FDefaultAction, True);
1759	<	if Assigned(FOnIdleTimer) then
1760	<	FOnIdleTimer(Self);
1761	<	end
1762	<	else
1763	<	FCanTimeout := True;
1764	<	end;
1765	<	end;
1766	<
1767	<	procedure TIBTransaction.TRParamsChange(Sender: TObject);
1768	<	begin
1769	<	FTRParamsChanged := True;
1770	<	end;
1771	<
1772	<	procedure TIBTransaction.TRParamsChanging(Sender: TObject);
1773	<	begin
1774	<	EnsureNotInTransaction;
1775	<	CheckNotInTransaction;
1776	<	end;
1777	<
1778	<	{ TIBBase }
1779	<	constructor TIBBase.Create(AOwner: TObject);
1780	<	begin
1781	<	FOwner := AOwner;
1782	<	end;
1783	<
1784	<	destructor TIBBase.Destroy;
1785	<	begin
1786	<	SetDatabase(nil);
1787	<	SetTransaction(nil);
1788	<	inherited Destroy;
1789	<	end;
1790	<
1791	<	procedure TIBBase.CheckDatabase;
1792	<	begin
1793	<	if (FDatabase = nil) then
1794	<	IBError(ibxeDatabaseNotAssigned, [nil]);
1795	<	FDatabase.CheckActive;
1796	<	end;
1797	<
1798	<	procedure TIBBase.CheckTransaction;
1799	<	begin
1800	<	if FTransaction = nil then
1801	<	IBError(ibxeTransactionNotAssigned, [nil]);
1802	<	FTransaction.CheckInTransaction;
1803	<	end;
1804	<
1805	<	function TIBBase.GetDBHandle: PISC_DB_HANDLE;
1806	<	begin
1807	<	CheckDatabase;
1808	<	result := @FDatabase.Handle;
1809	<	end;
1810	<
1811	<	function TIBBase.GetTRHandle: PISC_TR_HANDLE;
1812	<	begin
1813	<	CheckTransaction;
1814	<	result := @FTransaction.Handle;
1815	<	end;
1816	<
1817	<	procedure TIBBase.DoBeforeDatabaseDisconnect;
1818	<	begin
1819	<	if Assigned(BeforeDatabaseDisconnect) then
1820	<	BeforeDatabaseDisconnect(Self);
1821	<	end;
1822	<
1823	<	procedure TIBBase.DoAfterDatabaseDisconnect;
1824	<	begin
1825	<	if Assigned(AfterDatabaseDisconnect) then
1826	<	AfterDatabaseDisconnect(Self);
1827	<	end;
1828	<
1829	<	procedure TIBBase.DoDatabaseFree;
1830	<	begin
1831	<	if Assigned(OnDatabaseFree) then
1832	<	OnDatabaseFree(Self);
1833	<	SetDatabase(nil);
1834	<	SetTransaction(nil);
1835	<	end;
1836	<
1837	<	procedure TIBBase.DoBeforeTransactionEnd;
1838	<	begin
1839	<	if Assigned(BeforeTransactionEnd) then
1840	<	BeforeTransactionEnd(Self);
1841	<	end;
1842	<
1843	<	procedure TIBBase.DoAfterTransactionEnd;
1844	<	begin
1845	<	if Assigned(AfterTransactionEnd) then
1846	<	AfterTransactionEnd(Self);
1847	<	end;
1848	<
1849	<	procedure TIBBase.DoTransactionFree;
1850	<	begin
1851	<	if Assigned(OnTransactionFree) then
1852	<	OnTransactionFree(Self);
1853	<	FTransaction := nil;
1854	<	end;
1855	<
1856	<	procedure TIBBase.SetDatabase(Value: TIBDatabase);
1857	<	begin
1858	<	if (FDatabase <> nil) then
1859	<	FDatabase.RemoveSQLObject(FIndexInDatabase);
1860	<	FDatabase := Value;
1861	<	if (FDatabase <> nil) then
1862	<	begin
1863	<	FIndexInDatabase := FDatabase.AddSQLObject(Self);
1864	<	if (FTransaction = nil) then
1865	<	Transaction := FDatabase.FindDefaultTransaction;
1866	<	end;
1867	<	end;
1868	<
1869	<	procedure TIBBase.SetTransaction(Value: TIBTransaction);
1870	<	begin
1871	<	if (FTransaction <> nil) then
1872	<	FTransaction.RemoveSQLObject(FIndexInTransaction);
1873	<	FTransaction := Value;
1874	<	if (FTransaction <> nil) then
1875	<	begin
1876	<	FIndexInTransaction := FTransaction.AddSQLObject(Self);
1877	<	if (FDatabase = nil) then
1878	<	Database := FTransaction.FindDefaultDatabase;
1879	<	end;
1880	<	end;
1881	<
1882	<	{ GenerateDPB -
1883	<	Given a string containing a textual representation
1884	<	of the database parameters, generate a database
1885	<	parameter buffer, and return it and its length
1886	<	in DPB and DPBLength, respectively. }
1887	<
1888	<	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
1889	<	var
1890	<	i, j, pval: Integer;
1891	<	DPBVal: UShort;
1892	<	ParamName, ParamValue: string;
1893	<	begin
1894	<	{ The DPB is initially empty, with the exception that
1895	<	the DPB version must be the first byte of the string. }
1896	<	DPBLength := 1;
1897	<	DPB := Char(isc_dpb_version1);
1898	<
1899	<	{Iterate through the textual database parameters, constructing
1900	<	a DPB on-the-fly }
1901	<	for i := 0 to sl.Count - 1 do
1902	<	begin
1903	<	{ Get the parameter's name and value from the list,
1904	<	and make sure that the name is all lowercase with
1905	<	no leading 'isc_dpb_' prefix
1906	<	}
1907	<	if (Trim(sl.Names[i]) = '') then
1908	<	continue;
1909	<	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
1910	<	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
1911	<	if (Pos(DPBPrefix, ParamName) = 1) then {mbcs ok}
1912	<	Delete(ParamName, 1, Length(DPBPrefix));
1913	<	{ We want to translate the parameter name to some Integer
1914	<	value. We do this by scanning through a list of known
1915	<	database parameter names (DPBConstantNames, defined above) }
1916	<	DPBVal := 0;
1917	<	{ Find the parameter }
1918	<	for j := 1 to isc_dpb_last_dpb_constant do
1919	<	if (ParamName = DPBConstantNames[j]) then
1920	<	begin
1921	<	DPBVal := j;
1922	<	break;
1923	<	end;
1924	<	{  A database parameter either contains a string value (case 1)
1925	<	or an Integer value (case 2)
1926	<	or no value at all (case 3)
1927	<	or an error needs to be generated (case else)  }
1928	<	case DPBVal of
1929	<	isc_dpb_user_name, isc_dpb_password, isc_dpb_password_enc,
1930	<	isc_dpb_sys_user_name, isc_dpb_license, isc_dpb_encrypt_key,
1931	<	isc_dpb_lc_messages, isc_dpb_lc_ctype,
1932	<	isc_dpb_sql_role_name, isc_dpb_sql_dialect:
1933	<	begin
1934	<	if DPBVal = isc_dpb_sql_dialect then
1935	<	ParamValue[1] := Char(Ord(ParamValue[1]) - 48);
1936	<	DPB := DPB +
1937	<	Char(DPBVal) +
1938	<	Char(Length(ParamValue)) +
1939	<	ParamValue;
1940	<	Inc(DPBLength, 2 + Length(ParamValue));
1941	<	end;
1942	<	isc_dpb_num_buffers, isc_dpb_dbkey_scope, isc_dpb_force_write,
1943	<	isc_dpb_no_reserve, isc_dpb_damaged, isc_dpb_verify:
1944	<	begin
1945	<	DPB := DPB +
1946	<	Char(DPBVal) +
1947	<	#1 +
1948	<	Char(StrToInt(ParamValue));
1949	<	Inc(DPBLength, 3);
1950	<	end;
1951	<	isc_dpb_sweep:
1952	<	begin
1953	<	DPB := DPB +
1954	<	Char(DPBVal) +
1955	<	#1 +
1956	<	Char(isc_dpb_records);
1957	<	Inc(DPBLength, 3);
1958	<	end;
1959	<	isc_dpb_sweep_interval:
1960	<	begin
1961	<	pval := StrToInt(ParamValue);
1962	<	DPB := DPB +
1963	<	Char(DPBVal) +
1964	<	#4 +
1965	<	PChar(@pval)[0] +
1966	<	PChar(@pval)[1] +
1967	<	PChar(@pval)[2] +
1968	<	PChar(@pval)[3];
1969	<	Inc(DPBLength, 6);
1970	<	end;
1971	<	isc_dpb_activate_shadow, isc_dpb_delete_shadow, isc_dpb_begin_log,
1972	<	isc_dpb_quit_log:
1973	<	begin
1974	<	DPB := DPB +
1975	<	Char(DPBVal) +
1976	<	#1 + #0;
1977	<	Inc(DPBLength, 3);
1978	<	end;
1979	<	else
1980	<	begin
1981	<	if (DPBVal > 0) and
1982	<	(DPBVal <= isc_dpb_last_dpb_constant) then
1983	<	IBError(ibxeDPBConstantNotSupported, [DPBConstantNames[DPBVal]])
1984	<	else
1985	<	IBError(ibxeDPBConstantUnknownEx, [sl.Names[i]]);
1986	<	end;
1987	<	end;
1988	<	end;
1989	<	end;
1990	<
1991	<	{ GenerateTPB -
1992	<	Given a string containing a textual representation
1993	<	of the transaction parameters, generate a transaction
1994	<	parameter buffer, and return it and its length in
1995	<	TPB and TPBLength, respectively. }
1996	<	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
1997	<	var
1998	<	i, j, TPBVal, ParamLength: Integer;
1999	<	ParamName, ParamValue: string;
2000	<	begin
2001	<	TPB := '';
2002	<	if (sl.Count = 0) then
2003	<	TPBLength := 0
2004	<	else
2005	<	begin
2006	<	TPBLength := sl.Count + 1;
2007	<	TPB := TPB + Char(isc_tpb_version3);
2008	<	end;
2009	<	for i := 0 to sl.Count - 1 do
2010	<	begin
2011	<	if (Trim(sl[i]) =  '') then
2012	<	begin
2013	<	Dec(TPBLength);
2014	<	Continue;
2015	<	end;
2016	<	if (Pos('=', sl[i]) = 0) then {mbcs ok}
2017	<	ParamName := LowerCase(sl[i]) {mbcs ok}
2018	<	else
2019	<	begin
2020	<	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
2021	<	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
2022	<	end;
2023	<	if (Pos(TPBPrefix, ParamName) = 1) then {mbcs ok}
2024	<	Delete(ParamName, 1, Length(TPBPrefix));
2025	<	TPBVal := 0;
2026	<	{ Find the parameter }
2027	<	for j := 1 to isc_tpb_last_tpb_constant do
2028	<	if (ParamName = TPBConstantNames[j]) then
2029	<	begin
2030	<	TPBVal := j;
2031	<	break;
2032	<	end;
2033	<	{ Now act on it }
2034	<	case TPBVal of
2035	<	isc_tpb_consistency, isc_tpb_exclusive, isc_tpb_protected,
2036	<	isc_tpb_concurrency, isc_tpb_shared, isc_tpb_wait, isc_tpb_nowait,
2037	<	isc_tpb_read, isc_tpb_write, isc_tpb_ignore_limbo,
2038	<	isc_tpb_read_committed, isc_tpb_rec_version, isc_tpb_no_rec_version:
2039	<	TPB := TPB + Char(TPBVal);
2040	<	isc_tpb_lock_read, isc_tpb_lock_write:
2041	<	begin
2042	<	TPB := TPB + Char(TPBVal);
2043	<	{ Now set the string parameter }
2044	<	ParamLength := Length(ParamValue);
2045	<	Inc(TPBLength, ParamLength + 1);
2046	<	TPB := TPB + Char(ParamLength) + ParamValue;
2047	<	end;
2048	<	else
2049	<	begin
2050	<	if (TPBVal > 0) and
2051	<	(TPBVal <= isc_tpb_last_tpb_constant) then
2052	<	IBError(ibxeTPBConstantNotSupported, [TPBConstantNames[TPBVal]])
2053	<	else
2054	<	IBError(ibxeTPBConstantUnknownEx, [sl.Names[i]]);
2055	<	end;
2056	<	end;
2057	<	end;
2058	<	end;
2059	<
2060	<	end.
2061	<
2062	<
2063	<
2064	<
2065	<
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	>	SysUtils, Classes, FPTimer, IBHeader, IBExternals, DB,
47	>	IB, CustApp;
48	>
49	>	const
50	>	DPBPrefix = 'isc_dpb_';
51	>	DPBConstantNames: array[1..isc_dpb_last_dpb_constant] of string = (
52	>	'cdd_pathname',
53	>	'allocation',
54	>	'journal',
55	>	'page_size',
56	>	'num_buffers',
57	>	'buffer_length',
58	>	'debug',
59	>	'garbage_collect',
60	>	'verify',
61	>	'sweep',
62	>	'enable_journal',
63	>	'disable_journal',
64	>	'dbkey_scope',
65	>	'number_of_users',
66	>	'trace',
67	>	'no_garbage_collect',
68	>	'damaged',
69	>	'license',
70	>	'sys_user_name',
71	>	'encrypt_key',
72	>	'activate_shadow',
73	>	'sweep_interval',
74	>	'delete_shadow',
75	>	'force_write',
76	>	'begin_log',
77	>	'quit_log',
78	>	'no_reserve',
79	>	'user_name',
80	>	'password',
81	>	'password_enc',
82	>	'sys_user_name_enc',
83	>	'interp',
84	>	'online_dump',
85	>	'old_file_size',
86	>	'old_num_files',
87	>	'old_file',
88	>	'old_start_page',
89	>	'old_start_seqno',
90	>	'old_start_file',
91	>	'drop_walfile',
92	>	'old_dump_id',
93	>	'wal_backup_dir',
94	>	'wal_chkptlen',
95	>	'wal_numbufs',
96	>	'wal_bufsize',
97	>	'wal_grp_cmt_wait',
98	>	'lc_messages',
99	>	'lc_ctype',
100	>	'cache_manager',
101	>	'shutdown',
102	>	'online',
103	>	'shutdown_delay',
104	>	'reserved',
105	>	'overwrite',
106	>	'sec_attach',
107	>	'disable_wal',
108	>	'connect_timeout',
109	>	'dummy_packet_interval',
110	>	'gbak_attach',
111	>	'sql_role_name',
112	>	'set_page_buffers',
113	>	'working_directory',
114	>	'sql_dialect',
115	>	'set_db_readonly',
116	>	'set_db_sql_dialect',
117	>	'gfix_attach',
118	>	'gstat_attach'
119	>	);
120	>
121	>	TPBPrefix = 'isc_tpb_';
122	>	TPBConstantNames: array[1..isc_tpb_last_tpb_constant] of string = (
123	>	'consistency',
124	>	'concurrency',
125	>	'shared',
126	>	'protected',
127	>	'exclusive',
128	>	'wait',
129	>	'nowait',
130	>	'read',
131	>	'write',
132	>	'lock_read',
133	>	'lock_write',
134	>	'verb_time',
135	>	'commit_time',
136	>	'ignore_limbo',
137	>	'read_committed',
138	>	'autocommit',
139	>	'rec_version',
140	>	'no_rec_version',
141	>	'restart_requests',
142	>	'no_auto_undo'
143	>	);
144	>
145	>	type
146	>
147	>	TIBDatabase = class;
148	>	TIBTransaction = class;
149	>	TIBBase = class;
150	>
151	>	TIBDatabaseLoginEvent = procedure(Database: TIBDatabase;
152	>	LoginParams: TStrings) of object;
153	>
154	>	TIBFileName = type string;
155	>	{ TIBDatabase }
156	>	TIBDataBase = class(TCustomConnection)
157	>	private
158	>	FAllowStreamedConnected: boolean;
159	>	FHiddenPassword: string;
160	>	FIBLoaded: Boolean;
161	>	FOnLogin: TIBDatabaseLoginEvent;
162	>	FSQLHourGlass: Boolean;
163	>	FTraceFlags: TTraceFlags;
164	>	FDBSQLDialect: Integer;
165	>	FSQLDialect: Integer;
166	>	FOnDialectDowngradeWarning: TNotifyEvent;
167	>	FCanTimeout: Boolean;
168	>	FSQLObjects: TList;
169	>	FTransactions: TList;
170	>	FDBName: TIBFileName;
171	>	FDBParams: TStrings;
172	>	FDBParamsChanged: Boolean;
173	>	FDPB: PChar;
174	>	FDPBLength: Short;
175	>	FHandle: TISC_DB_HANDLE;
176	>	FHandleIsShared: Boolean;
177	>	FOnIdleTimer: TNotifyEvent;
178	>	FDefaultTransaction: TIBTransaction;
179	>	FInternalTransaction: TIBTransaction;
180	>	FStreamedConnected: Boolean;
181	>	FTimer: TFPTimer;
182	>	FUserNames: TStringList;
183	>	FDataSets: TList;
184	>	FLoginCalled: boolean;
185	>	FCharSetSizes: array of integer;
186	>	procedure EnsureInactive;
187	>	function GetDBSQLDialect: Integer;
188	>	function GetSQLDialect: Integer;
189	>	procedure SetSQLDialect(const Value: Integer);
190	>	procedure ValidateClientSQLDialect;
191	>	procedure DBParamsChange(Sender: TObject);
192	>	procedure DBParamsChanging(Sender: TObject);
193	>	function GetSQLObject(Index: Integer): TIBBase;
194	>	function GetSQLObjectCount: Integer;
195	>	function GetDBParamByDPB(const Idx: Integer): String;
196	>	function GetIdleTimer: Integer;
197	>	function GetTransaction(Index: Integer): TIBTransaction;
198	>	function GetTransactionCount: Integer;
199	>	function Login: Boolean;
200	>	procedure LoadCharSetInfo;
201	>	procedure SetDatabaseName(const Value: TIBFileName);
202	>	procedure SetDBParamByDPB(const Idx: Integer; Value: String);
203	>	procedure SetDBParams(Value: TStrings);
204	>	procedure SetDefaultTransaction(Value: TIBTransaction);
205	>	procedure SetIdleTimer(Value: Integer);
206	>	procedure TimeoutConnection(Sender: TObject);
207	>	function GetIsReadOnly: Boolean;
208	>	function AddSQLObject(ds: TIBBase): Integer;
209	>	procedure RemoveSQLObject(Idx: Integer);
210	>	procedure RemoveSQLObjects;
211	>	procedure InternalClose(Force: Boolean);
212	>
213	>	protected
214	>	procedure DoConnect; override;
215	>	procedure DoDisconnect; override;
216	>	function GetConnected: Boolean; override;
217	>	procedure CheckStreamConnect;
218	>	procedure HandleException(Sender: TObject);
219	>	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
220	>	function GetDataset(Index : longint) : TDataset; override;
221	>	function GetDataSetCount : Longint; override;
222	>	procedure ReadState(Reader: TReader); override;
223	>	procedure SetConnected (Value : boolean); override;
224	>	public
225	>	constructor Create(AOwner: TComponent); override;
226	>	destructor Destroy; override;
227	>	procedure ApplyUpdates(const DataSets: array of TDataSet);
228	>	procedure CloseDataSets;
229	>	procedure CheckActive;
230	>	procedure CheckInactive;
231	>	procedure CreateDatabase;
232	>	procedure DropDatabase;
233	>	procedure ForceClose;
234	>	procedure GetFieldNames(const TableName: string; List: TStrings);
235	>	procedure GetTableNames(List: TStrings; SystemTables: Boolean = False);
236	>	function IndexOfDBConst(st: String): Integer;
237	>	function TestConnected: Boolean;
238	>	procedure CheckDatabaseName;
239	>	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
240	>	function AddTransaction(TR: TIBTransaction): Integer;
241	>	function FindTransaction(TR: TIBTransaction): Integer;
242	>	function FindDefaultTransaction(): TIBTransaction;
243	>	procedure RemoveTransaction(Idx: Integer);
244	>	procedure RemoveTransactions;
245	>	procedure SetHandle(Value: TISC_DB_HANDLE);
246	>
247	>	property Handle: TISC_DB_HANDLE read FHandle;
248	>	property IsReadOnly: Boolean read GetIsReadOnly;
249	>	property DBParamByDPB[const Idx: Integer]: String read GetDBParamByDPB
250	>	write SetDBParamByDPB;
251	>	property SQLObjectCount: Integer read GetSQLObjectCount;
252	>	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
253	>	property HandleIsShared: Boolean read FHandleIsShared;
254	>	property TransactionCount: Integer read GetTransactionCount;
255	>	property Transactions[Index: Integer]: TIBTransaction read GetTransaction;
256	>	property InternalTransaction: TIBTransaction read FInternalTransaction;
257	>
258	>	published
259	>	property Connected;
260	>	property AllowStreamedConnected: boolean read FAllowStreamedConnected
261	>	write FAllowStreamedConnected;
262	>	property DatabaseName: TIBFileName read FDBName write SetDatabaseName;
263	>	property Params: TStrings read FDBParams write SetDBParams;
264	>	property LoginPrompt default True;
265	>	property DefaultTransaction: TIBTransaction read FDefaultTransaction
266	>	write SetDefaultTransaction;
267	>	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer;
268	>	property SQLDialect : Integer read GetSQLDialect write SetSQLDialect default 3;
269	>	property SQLHourGlass: Boolean read FSQLHourGlass write FSQLHourGlass default true;
270	>	property DBSQLDialect : Integer read FDBSQLDialect;
271	>	property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
272	>	property AfterConnect;
273	>	property AfterDisconnect;
274	>	property BeforeConnect;
275	>	property BeforeDisconnect;
276	>	property OnLogin: TIBDatabaseLoginEvent read FOnLogin write FOnLogin;
277	>	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
278	>	property OnDialectDowngradeWarning: TNotifyEvent read FOnDialectDowngradeWarning write FOnDialectDowngradeWarning;
279	>	end;
280	>
281	>	{ TIBTransaction }
282	>
283	>	TTransactionAction         = (TARollback, TACommit, TARollbackRetaining, TACommitRetaining);
284	>
285	>	TIBTransaction = class(TComponent)
286	>	private
287	>	FAfterDelete: TNotifyEvent;
288	>	FAfterEdit: TNotifyEvent;
289	>	FAfterExecQuery: TNotifyEvent;
290	>	FAfterInsert: TNotifyEvent;
291	>	FAfterPost: TNotifyEvent;
292	>	FAfterTransactionEnd: TNotifyEvent;
293	>	FBeforeTransactionEnd: TNotifyEvent;
294	>	FIBLoaded: Boolean;
295	>	FCanTimeout         : Boolean;
296	>	FDatabases          : TList;
297	>	FOnStartTransaction: TNotifyEvent;
298	>	FSQLObjects         : TList;
299	>	FDefaultDatabase    : TIBDatabase;
300	>	FHandle             : TISC_TR_HANDLE;
301	>	FHandleIsShared     : Boolean;
302	>	FOnIdleTimer          : TNotifyEvent;
303	>	FStreamedActive     : Boolean;
304	>	FTPB                : PChar;
305	>	FTPBLength          : Short;
306	>	FTimer              : TFPTimer;
307	>	FDefaultAction      : TTransactionAction;
308	>	FTRParams           : TStrings;
309	>	FTRParamsChanged    : Boolean;
310	>	FInEndTransaction   : boolean;
311	>	FEndAction          : TTransactionAction;
312	>	procedure DoBeforeTransactionEnd;
313	>	procedure DoAfterTransactionEnd;
314	>	procedure DoOnStartTransaction;
315	>	procedure DoAfterExecQuery(Sender: TObject);
316	>	procedure DoAfterEdit(Sender: TObject);
317	>	procedure DoAfterDelete(Sender: TObject);
318	>	procedure DoAfterInsert(Sender: TObject);
319	>	procedure DoAfterPost(Sender: TObject);
320	>	procedure EnsureNotInTransaction;
321	>	procedure EndTransaction(Action: TTransactionAction; Force: Boolean);
322	>	function GetDatabase(Index: Integer): TIBDatabase;
323	>	function GetDatabaseCount: Integer;
324	>	function GetSQLObject(Index: Integer): TIBBase;
325	>	function GetSQLObjectCount: Integer;
326	>	function GetInTransaction: Boolean;
327	>	function GetIdleTimer: Integer;
328	>	procedure BeforeDatabaseDisconnect(DB: TIBDatabase);
329	>	procedure SetActive(Value: Boolean);
330	>	procedure SetDefaultAction(Value: TTransactionAction);
331	>	procedure SetDefaultDatabase(Value: TIBDatabase);
332	>	procedure SetIdleTimer(Value: Integer);
333	>	procedure SetTRParams(Value: TStrings);
334	>	procedure TimeoutTransaction(Sender: TObject);
335	>	procedure TRParamsChange(Sender: TObject);
336	>	procedure TRParamsChanging(Sender: TObject);
337	>	function AddSQLObject(ds: TIBBase): Integer;
338	>	procedure RemoveSQLObject(Idx: Integer);
339	>	procedure RemoveSQLObjects;
340	>
341	>	protected
342	>	procedure Loaded; override;
343	>	procedure SetHandle(Value: TISC_TR_HANDLE);
344	>	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
345	>
346	>	public
347	>	constructor Create(AOwner: TComponent); override;
348	>	destructor Destroy; override;
349	>	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
350	>	procedure Commit;
351	>	procedure CommitRetaining;
352	>	procedure Rollback;
353	>	procedure RollbackRetaining;
354	>	procedure StartTransaction;
355	>	procedure CheckInTransaction;
356	>	procedure CheckNotInTransaction;
357	>
358	>	function AddDatabase(db: TIBDatabase): Integer;
359	>	function FindDatabase(db: TIBDatabase): Integer;
360	>	function FindDefaultDatabase: TIBDatabase;
361	>	function GetEndAction: TTransactionAction;
362	>	procedure RemoveDatabase(Idx: Integer);
363	>	procedure RemoveDatabases;
364	>	procedure CheckDatabasesInList;
365	>
366	>	property DatabaseCount: Integer read GetDatabaseCount;
367	>	property Databases[Index: Integer]: TIBDatabase read GetDatabase;
368	>	property SQLObjectCount: Integer read GetSQLObjectCount;
369	>	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
370	>	property Handle: TISC_TR_HANDLE read FHandle;
371	>	property HandleIsShared: Boolean read FHandleIsShared;
372	>	property InTransaction: Boolean read GetInTransaction;
373	>	property TPB: PChar read FTPB;
374	>	property TPBLength: Short read FTPBLength;
375	>	published
376	>	property Active: Boolean read GetInTransaction write SetActive;
377	>	property DefaultDatabase: TIBDatabase read FDefaultDatabase
378	>	write SetDefaultDatabase;
379	>	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer default 0;
380	>	property DefaultAction: TTransactionAction read FDefaultAction write SetDefaultAction default taCommit;
381	>	property Params: TStrings read FTRParams write SetTRParams;
382	>	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
383	>	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
384	>	write FBeforeTransactionEnd;
385	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
386	>	write FAfterTransactionEnd;
387	>	property OnStartTransaction: TNotifyEvent read FOnStartTransaction
388	>	write FOnStartTransaction;
389	>	property AfterExecQuery: TNotifyEvent read FAfterExecQuery
390	>	write FAfterExecQuery;
391	>	property AfterEdit: TNotifyEvent read FAfterEdit write FAfterEdit;
392	>	property AfterDelete: TNotifyEvent read FAfterDelete write FAfterDelete;
393	>	property AfterInsert: TNotifyEvent read FAfterInsert write FAfterInsert;
394	>	property AfterPost: TNotifyEvent read FAfterPost write FAfterPost;
395	>	end;
396	>
397	>	TTransactionEndEvent = procedure(Sender:TObject; Action: TTransactionAction) of object;
398	>	TBeforeDatabaseConnectEvent = procedure (Sender: TObject; DBParams: TStrings;
399	>	var DBName: string) of object;
400	>
401	>	{ TIBBase }
402	>
403	>	{ Virtually all components in IB are "descendents" of TIBBase.
404	>	It is to more easily manage the database and transaction
405	>	connections. }
406	>	TIBBase = class(TObject)
407	>	protected
408	>	FBeforeDatabaseConnect: TBeforeDatabaseConnectEvent;
409	>	FDatabase: TIBDatabase;
410	>	FIndexInDatabase: Integer;
411	>	FTransaction: TIBTransaction;
412	>	FIndexInTransaction: Integer;
413	>	FOwner: TObject;
414	>	FBeforeDatabaseDisconnect: TNotifyEvent;
415	>	FAfterDatabaseDisconnect: TNotifyEvent;
416	>	FAfterDatabaseConnect: TNotifyEvent;
417	>	FOnDatabaseFree: TNotifyEvent;
418	>	FBeforeTransactionEnd: TTransactionEndEvent;
419	>	FAfterTransactionEnd: TNotifyEvent;
420	>	FOnTransactionFree: TNotifyEvent;
421	>
422	>	procedure DoBeforeDatabaseConnect(DBParams: TStrings;
423	>	var DBName: string); virtual;
424	>	procedure DoAfterDatabaseConnect; virtual;
425	>	procedure DoBeforeDatabaseDisconnect; virtual;
426	>	procedure DoAfterDatabaseDisconnect; virtual;
427	>	procedure DoDatabaseFree; virtual;
428	>	procedure DoBeforeTransactionEnd(Action: TTransactionAction); virtual;
429	>	procedure DoAfterTransactionEnd; virtual;
430	>	procedure DoTransactionFree; virtual;
431	>	function GetDBHandle: PISC_DB_HANDLE; virtual;
432	>	function GetTRHandle: PISC_TR_HANDLE; virtual;
433	>	procedure SetDatabase(Value: TIBDatabase); virtual;
434	>	procedure SetTransaction(Value: TIBTransaction); virtual;
435	>	public
436	>	constructor Create(AOwner: TObject);
437	>	destructor Destroy; override;
438	>	procedure CheckDatabase; virtual;
439	>	procedure CheckTransaction; virtual;
440	>	procedure DoAfterExecQuery(Sender: TObject); virtual;
441	>	procedure DoAfterEdit(Sender: TObject); virtual;
442	>	procedure DoAfterDelete(Sender: TObject); virtual;
443	>	procedure DoAfterInsert(Sender: TObject); virtual;
444	>	procedure DoAfterPost(Sender: TObject); virtual;
445	>	function GetCharSetSize(CharSetID: integer): integer;
446	>	procedure HandleException(Sender: TObject);
447	>	procedure SetCursor;
448	>	procedure RestoreCursor;
449	>	public
450	>	property BeforeDatabaseConnect: TBeforeDatabaseConnectEvent read FBeforeDatabaseConnect
451	>	write FBeforeDatabaseConnect;
452	>	property AfterDatabaseConnect: TNotifyEvent read FAfterDatabaseConnect
453	>	write FAfterDatabaseConnect;
454	>	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
455	>	write FBeforeDatabaseDisconnect;
456	>	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
457	>	write FAfterDatabaseDisconnect;
458	>	property OnDatabaseFree: TNotifyEvent read FOnDatabaseFree write FOnDatabaseFree;
459	>	property BeforeTransactionEnd: TTransactionEndEvent read FBeforeTransactionEnd write FBeforeTransactionEnd;
460	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd write FAfterTransactionEnd;
461	>	property OnTransactionFree: TNotifyEvent read FOnTransactionFree write FOnTransactionFree;
462	>	property Database: TIBDatabase read FDatabase
463	>	write SetDatabase;
464	>	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
465	>	property Owner: TObject read FOwner;
466	>	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
467	>	property Transaction: TIBTransaction read FTransaction
468	>	write SetTransaction;
469	>	end;
470	>
471	>	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
472	>	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
473	>
474	>
475	>	implementation
476	>
477	>	uses IBIntf, IBSQLMonitor, IBCustomDataSet, IBDatabaseInfo, IBSQL, IBUtils,
478	>	typInfo;
479	>
480	>	{ TIBDatabase }
481	>
482	>	constructor TIBDataBase.Create(AOwner: TComponent);
483	>	{$ifdef WINDOWS}
484	>	var acp: uint;
485	>	{$endif}
486	>	begin
487	>	inherited Create(AOwner);
488	>	FIBLoaded := False;
489	>	CheckIBLoaded;
490	>	FIBLoaded := True;
491	>	LoginPrompt := True;
492	>	FSQLObjects := TList.Create;
493	>	FTransactions := TList.Create;
494	>	FDBName := '';
495	>	FDBParams := TStringList.Create;
496	>	FSQLHourGlass := true;
497	>	if (AOwner <> nil) and
498	>	(AOwner is TCustomApplication) and
499	>	TCustomApplication(AOWner).ConsoleApplication then
500	>	LoginPrompt := false;
501	>	{$ifdef UNIX}
502	>	if csDesigning in ComponentState then
503	>	FDBParams.Add('lc_ctype=UTF-8');
504	>	{$else}
505	>	{$ifdef WINDOWS}
506	>	if csDesigning in ComponentState then
507	>	begin
508	>	acp := GetACP;
509	>	if (acp >= 1250) and (acp <= 1254) then
510	>	FDBParams.Values['lc_ctype'] := Format('WIN%d',[acp]);
511	>	end;
512	>	{$endif}
513	>	{$endif}
514	>	FDBParamsChanged := True;
515	>	TStringList(FDBParams).OnChange := DBParamsChange;
516	>	TStringList(FDBParams).OnChanging := DBParamsChanging;
517	>	FDPB := nil;
518	>	FHandle := nil;
519	>	FUserNames := nil;
520	>	FInternalTransaction := TIBTransaction.Create(self);
521	>	FInternalTransaction.DefaultDatabase := Self;
522	>	FTimer := TFPTimer.Create(Self);
523	>	FTimer.Enabled := False;
524	>	FTimer.Interval := 0;
525	>	FTimer.OnTimer := TimeoutConnection;
526	>	FDBSQLDialect := 1;
527	>	FSQLDialect := 3;
528	>	FTraceFlags := [];
529	>	FDataSets := TList.Create;
530	>	CheckStreamConnect;
531	>	end;
532	>
533	>	destructor TIBDataBase.Destroy;
534	>	var
535	>	i: Integer;
536	>	begin
537	>	if FIBLoaded then
538	>	begin
539	>	IdleTimer := 0;
540	>	if FHandle <> nil then
541	>	ForceClose;
542	>	for i := 0 to FSQLObjects.Count - 1 do
543	>	if FSQLObjects[i] <> nil then
544	>	SQLObjects[i].DoDatabaseFree;
545	>	RemoveSQLObjects;
546	>	RemoveTransactions;
547	>	FInternalTransaction.Free;
548	>	FreeMem(FDPB);
549	>	FDPB := nil;
550	>	FDBParams.Free;
551	>	FSQLObjects.Free;
552	>	FUserNames.Free;
553	>	FTransactions.Free;
554	>	end;
555	>	FDataSets.Free;
556	>	inherited Destroy;
557	>	end;
558	>
559	>	function TIBDataBase.Call(ErrCode: ISC_STATUS; RaiseError: Boolean
560	>	): ISC_STATUS;
561	>	begin
562	>	result := ErrCode;
563	>	FCanTimeout := False;
564	>	if RaiseError and (ErrCode > 0) then
565	>	IBDataBaseError;
566	>	end;
567	>
568	>	procedure TIBDataBase.CheckActive;
569	>	begin
570	>	if StreamedConnected and (not Connected) then
571	>	Loaded;
572	>	if FHandle = nil then
573	>	IBError(ibxeDatabaseClosed, [nil]);
574	>	end;
575	>
576	>	procedure TIBDataBase.EnsureInactive;
577	>	begin
578	>	if csDesigning in ComponentState then
579	>	begin
580	>	if FHandle <> nil then
581	>	Close;
582	>	end
583	>	end;
584	>
585	>	procedure TIBDataBase.CheckInactive;
586	>	begin
587	>	if FHandle <> nil then
588	>	IBError(ibxeDatabaseOpen, [nil]);
589	>	end;
590	>
591	>	procedure TIBDataBase.CheckDatabaseName;
592	>	begin
593	>	if (FDBName = '') then
594	>	IBError(ibxeDatabaseNameMissing, [nil]);
595	>	end;
596	>
597	>	function TIBDataBase.AddSQLObject(ds: TIBBase): Integer;
598	>	begin
599	>	result := 0;
600	>	if (ds.Owner is TIBCustomDataSet) then
601	>	FDataSets.Add(ds.Owner);
602	>	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
603	>	Inc(result);
604	>	if (result = FSQLObjects.Count) then
605	>	FSQLObjects.Add(ds)
606	>	else
607	>	FSQLObjects[result] := ds;
608	>	end;
609	>
610	>	function TIBDataBase.AddTransaction(TR: TIBTransaction): Integer;
611	>	begin
612	>	result := FindTransaction(TR);
613	>	if result <> -1 then
614	>	begin
615	>	result := -1;
616	>	exit;
617	>	end;
618	>	result := 0;
619	>	while (result < FTransactions.Count) and (FTransactions[result] <> nil) do
620	>	Inc(result);
621	>	if (result = FTransactions.Count) then
622	>	FTransactions.Add(TR)
623	>	else
624	>	FTransactions[result] := TR;
625	>	end;
626	>
627	>	procedure TIBDataBase.DoDisconnect;
628	>	begin
629	>	if Connected then
630	>	InternalClose(False);
631	>	FDBSQLDialect := 1;
632	>	SetLength(FCharSetSizes,0);
633	>	end;
634	>
635	>	procedure TIBDataBase.CreateDatabase;
636	>	var
637	>	tr_handle: TISC_TR_HANDLE;
638	>	begin
639	>	CheckInactive;
640	>	tr_handle := nil;
641	>	Call(
642	>	isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0,
643	>	PChar('CREATE DATABASE ''' + FDBName + ''' ' + {do not localize}
644	>	Params.Text), SQLDialect, nil),
645	>	True);
646	>	end;
647	>
648	>	procedure TIBDataBase.DropDatabase;
649	>	begin
650	>	CheckActive;
651	>	Call(isc_drop_database(StatusVector, @FHandle), True);
652	>	end;
653	>
654	>	procedure TIBDataBase.DBParamsChange(Sender: TObject);
655	>	begin
656	>	FDBParamsChanged := True;
657	>	end;
658	>
659	>	procedure TIBDataBase.DBParamsChanging(Sender: TObject);
660	>	begin
661	>	EnsureInactive;
662	>	CheckInactive;
663	>	end;
664	>
665	>	function TIBDataBase.FindTransaction(TR: TIBTransaction): Integer;
666	>	var
667	>	i: Integer;
668	>	begin
669	>	result := -1;
670	>	for i := 0 to FTransactions.Count - 1 do
671	>	if TR = Transactions[i] then
672	>	begin
673	>	result := i;
674	>	break;
675	>	end;
676	>	end;
677	>
678	>	function TIBDataBase.FindDefaultTransaction: TIBTransaction;
679	>	var
680	>	i: Integer;
681	>	begin
682	>	result := FDefaultTransaction;
683	>	if result = nil then
684	>	begin
685	>	for i := 0 to FTransactions.Count - 1 do
686	>	if (Transactions[i] <> nil) and
687	>	(TIBTransaction(Transactions[i]).DefaultDatabase = self) and
688	>	(TIBTransaction(Transactions[i]) <> FInternalTransaction) then
689	>	begin
690	>	result := TIBTransaction(Transactions[i]);
691	>	break;
692	>	end;
693	>	end;
694	>	end;
695	>
696	>	procedure TIBDataBase.ForceClose;
697	>	begin
698	>	if Connected then
699	>	InternalClose(True);
700	>	end;
701	>
702	>	function TIBDataBase.GetConnected: Boolean;
703	>	begin
704	>	result := FHandle <> nil;
705	>	end;
706	>
707	>	function TIBDataBase.GetSQLObject(Index: Integer): TIBBase;
708	>	begin
709	>	result := FSQLObjects[Index];
710	>	end;
711	>
712	>	function TIBDataBase.GetSQLObjectCount: Integer;
713	>	var
714	>	i: Integer;
715	>	begin
716	>	result := 0;
717	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
718	>	Inc(result);
719	>	end;
720	>
721	>	function TIBDataBase.GetDBParamByDPB( const Idx: Integer): String;
722	>	var
723	>	ConstIdx, EqualsIdx: Integer;
724	>	begin
725	>	if (Idx > 0) and (Idx <= isc_dpb_last_dpb_constant) then
726	>	begin
727	>	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
728	>	if ConstIdx = -1 then
729	>	result := ''
730	>	else
731	>	begin
732	>	result := Params[ConstIdx];
733	>	EqualsIdx := Pos('=', result); {mbcs ok}
734	>	if EqualsIdx = 0 then
735	>	result := ''
736	>	else
737	>	result := Copy(result, EqualsIdx + 1, Length(result));
738	>	end;
739	>	end
740	>	else
741	>	result := '';
742	>	end;
743	>
744	>	function TIBDataBase.GetIdleTimer: Integer;
745	>	begin
746	>	result := FTimer.Interval;
747	>	end;
748	>
749	>	function TIBDataBase.GetTransaction(Index: Integer): TIBTransaction;
750	>	begin
751	>	result := FTransactions[Index];
752	>	end;
753	>
754	>	function TIBDataBase.GetTransactionCount: Integer;
755	>	var
756	>	i: Integer;
757	>	begin
758	>	result := 0;
759	>	for i := 0 to FTransactions.Count - 1 do
760	>	if FTransactions[i] <> nil then
761	>	Inc(result);
762	>	end;
763	>
764	>	function TIBDataBase.IndexOfDBConst(st: String): Integer;
765	>	var
766	>	i, pos_of_str: Integer;
767	>	begin
768	>	result := -1;
769	>	for i := 0 to Params.Count - 1 do
770	>	begin
771	>	pos_of_str := Pos(st, AnsiLowerCase(Params[i])); {mbcs ok}
772	>	if (pos_of_str = 1) or (pos_of_str = Length(DPBPrefix) + 1) then
773	>	begin
774	>	result := i;
775	>	break;
776	>	end;
777	>	end;
778	>	end;
779	>
780	>	procedure TIBDataBase.InternalClose(Force: Boolean);
781	>	var
782	>	i: Integer;
783	>	begin
784	>	CheckActive;
785	>	{ Tell all connected transactions that we're disconnecting.
786	>	This is so transactions can commit/rollback, accordingly
787	>	}
788	>	for i := 0 to FTransactions.Count - 1 do
789	>	begin
790	>	try
791	>	if FTransactions[i] <> nil then
792	>	Transactions[i].BeforeDatabaseDisconnect(Self);
793	>	except
794	>	if not Force then
795	>	raise;
796	>	end;
797	>	end;
798	>	for i := 0 to FSQLObjects.Count - 1 do
799	>	begin
800	>	try
801	>	if FSQLObjects[i] <> nil then
802	>	SQLObjects[i].DoBeforeDatabaseDisconnect;
803	>	except
804	>	if not Force then
805	>	raise;
806	>	end;
807	>	end;
808	>
809	>	if (not HandleIsShared) and
810	>	(Call(isc_detach_database(StatusVector, @FHandle), False) > 0) and
811	>	(not Force) then
812	>	IBDataBaseError
813	>	else
814	>	begin
815	>	FHandle := nil;
816	>	FHandleIsShared := False;
817	>	end;
818	>
819	>	if not (csDesigning in ComponentState) then
820	>	MonitorHook.DBDisconnect(Self);
821	>
822	>	for i := 0 to FSQLObjects.Count - 1 do
823	>	if FSQLObjects[i] <> nil then
824	>	SQLObjects[i].DoAfterDatabaseDisconnect;
825	>	end;
826	>
827	>	procedure TIBDataBase.LoadCharSetInfo;
828	>	var Query: TIBSQL;
829	>	i: integer;
830	>	begin
831	>	if not FInternalTransaction.Active then
832	>	FInternalTransaction.StartTransaction;
833	>	Query := TIBSQL.Create(self);
834	>	try
835	>	Query.Database := Self;
836	>	Query.Transaction := FInternalTransaction;
837	>	Query.SQL.Text := 'Select RDB$CHARACTER_SET_ID, RDB$BYTES_PER_CHARACTER ' +
838	>	'From RDB$CHARACTER_SETS Order by 1 DESC'; {do not localize}
839	>	Query.Prepare;
840	>	Query.ExecQuery;
841	>	if not Query.EOF then
842	>	begin
843	>	SetLength(FCharSetSizes,Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger + 1);
844	>	for i := 0 to Length(FCharSetSizes) - 1 do FCharSetSizes[i] := 1;
845	>	repeat
846	>	FCharSetSizes[Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger] :=
847	>	Query.FieldByName('RDB$BYTES_PER_CHARACTER').AsInteger;
848	>	Query.Next;
849	>	until Query.EOF;
850	>	end;
851	>	finally
852	>	Query.free;
853	>	FInternalTransaction.Commit;
854	>	end;
855	>	end;
856	>
857	>	procedure TIBDataBase.CheckStreamConnect;
858	>	var
859	>	i: integer;
860	>	begin
861	>	try
862	>	if not (csDesigning in ComponentState) and StreamedConnected and (not Connected) then
863	>	begin
864	>	for i := 0 to FTransactions.Count - 1 do
865	>	if  FTransactions[i] <> nil then
866	>	begin
867	>	with TIBTransaction(FTransactions[i]) do
868	>	if not Active then
869	>	if FStreamedActive and not InTransaction then
870	>	begin
871	>	StartTransaction;
872	>	FStreamedActive := False;
873	>	end;
874	>	end;
875	>	if (FDefaultTransaction <> nil) and
876	>	(FDefaultTransaction.FStreamedActive) and
877	>	(not FDefaultTransaction.InTransaction) then
878	>	FDefaultTransaction.StartTransaction;
879	>	FStreamedConnected := False;
880	>	end;
881	>	except
882	>	if csDesigning in ComponentState then
883	>	HandleException(Self)
884	>	else
885	>	raise;
886	>	end;
887	>	end;
888	>
889	>	procedure TIBDataBase.HandleException(Sender: TObject);
890	>	var aParent: TComponent;
891	>	begin
892	>	aParent := Owner;
893	>	while aParent <> nil do
894	>	begin
895	>	if aParent is TCustomApplication then
896	>	begin
897	>	TCustomApplication(aParent).HandleException(Sender);
898	>	Exit;
899	>	end;
900	>	aParent := aParent.Owner;
901	>	end;
902	>	SysUtils.ShowException(ExceptObject,ExceptAddr);
903	>	end;
904	>
905	>	procedure TIBDataBase.Notification(AComponent: TComponent;
906	>	Operation: TOperation);
907	>	var
908	>	i: Integer;
909	>	begin
910	>	inherited Notification( AComponent, Operation);
911	>	if (Operation = opRemove) and (AComponent = FDefaultTransaction) then
912	>	begin
913	>	i := FindTransaction(FDefaultTransaction);
914	>	if (i <> -1) then
915	>	RemoveTransaction(i);
916	>	FDefaultTransaction := nil;
917	>	end;
918	>	end;
919	>
920	>	function TIBDataBase.Login: Boolean;
921	>	var
922	>	IndexOfUser, IndexOfPassword: Integer;
923	>	Username, Password, OldPassword: String;
924	>	LoginParams: TStrings;
925	>
926	>	procedure HidePassword;
927	>	var
928	>	I: Integer;
929	>	IndexAt: Integer;
930	>	begin
931	>	IndexAt := 0;
932	>	for I := 0 to Params.Count -1 do
933	>	if Pos('password', LowerCase(Trim(Params.Names[i]))) = 1 then {mbcs ok}
934	>	begin
935	>	FHiddenPassword := Params.Values[Params.Names[i]];
936	>	IndexAt := I;
937	>	break;
938	>	end;
939	>	if IndexAt <> 0 then
940	>	Params.Delete(IndexAt);
941	>	end;
942	>
943	>	begin
944	>	Result := false;
945	>	if FLoginCalled then Exit;
946	>	FLoginCalled := true;
947	>	try
948	>	if Assigned(FOnLogin) and not (csDesigning in ComponentState) then
949	>	begin
950	>	result := True;
951	>	LoginParams := TStringList.Create;
952	>	try
953	>	LoginParams.Assign(Params);
954	>	FOnLogin(Self, LoginParams);
955	>	Params.Assign (LoginParams);
956	>	HidePassword;
957	>	finally
958	>	LoginParams.Free;
959	>	end;
960	>	end
961	>	else
962	>	if assigned(IBGUIInterface) then
963	>	begin
964	>	IndexOfUser := IndexOfDBConst(DPBConstantNames[isc_dpb_user_name]);
965	>	if IndexOfUser <> -1 then
966	>	Username := Copy(Params[IndexOfUser],
967	>	Pos('=', Params[IndexOfUser]) + 1, {mbcs ok}
968	>	Length(Params[IndexOfUser]));
969	>	IndexOfPassword := IndexOfDBConst(DPBConstantNames[isc_dpb_password]);
970	>	if IndexOfPassword <> -1 then
971	>	begin
972	>	Password := Copy(Params[IndexOfPassword],
973	>	Pos('=', Params[IndexOfPassword]) + 1, {mbcs ok}
974	>	Length(Params[IndexOfPassword]));
975	>	OldPassword := password;
976	>	end;
977	>	result := IBGUIInterface.LoginDialogEx(DatabaseName, Username, Password, False);
978	>	if result then
979	>	begin
980	>	if IndexOfUser = -1 then
981	>	Params.Add(DPBConstantNames[isc_dpb_user_name] + '=' + Username)
982	>	else
983	>	Params[IndexOfUser] := DPBConstantNames[isc_dpb_user_name] +
984	>	'=' + Username;
985	>	if (Password = OldPassword) then
986	>	FHiddenPassword := ''
987	>	else
988	>	begin
989	>	FHiddenPassword := Password;
990	>	if OldPassword <> '' then
991	>	HidePassword;
992	>	end;
993	>	end;
994	>	end
995	>	else
996	>	if LoginPrompt then
997	>	IBError(ibxeNoLoginDialog,[]);
998	>	finally
999	>	FLoginCalled := false
1000	>	end;
1001	>	end;
1002	>
1003	>	procedure TIBDataBase.DoConnect;
1004	>	var
1005	>	DPB: String;
1006	>	TempDBParams: TStrings;
1007	>	I: integer;
1008	>	aDBName: string;
1009	>	begin
1010	>	CheckInactive;
1011	>	CheckDatabaseName;
1012	>	if (not LoginPrompt) and (FHiddenPassword <> '') then
1013	>	begin
1014	>	FHiddenPassword := '';
1015	>	FDBParamsChanged := True;
1016	>	end;
1017	>	{ Use builtin login prompt if requested }
1018	>	if (LoginPrompt or (csDesigning in ComponentState)) and not Login then
1019	>	IBError(ibxeOperationCancelled, [nil]);
1020	>
1021	>	TempDBParams := TStringList.Create;
1022	>	try
1023	>	TempDBParams.Assign(FDBParams);
1024	>	aDBName := FDBName;
1025	>	{Opportuning to override defaults}
1026	>	for i := 0 to FSQLObjects.Count - 1 do
1027	>	begin
1028	>	if FSQLObjects[i] <> nil then
1029	>	SQLObjects[i].DoBeforeDatabaseConnect(TempDBParams,aDBName);
1030	>	end;
1031	>
1032	>	{ Generate a new DPB if necessary }
1033	>	if (FDBParamsChanged or (TempDBParams.Text <> FDBParams.Text)) then
1034	>	begin
1035	>	FDBParamsChanged := False;
1036	>	if (not LoginPrompt and not (csDesigning in ComponentState)) or (FHiddenPassword = '') then
1037	>	GenerateDPB(TempDBParams, DPB, FDPBLength)
1038	>	else
1039	>	begin
1040	>	TempDBParams.Add('password=' + FHiddenPassword);
1041	>	GenerateDPB(TempDBParams, DPB, FDPBLength);
1042	>	end;
1043	>	IBAlloc(FDPB, 0, FDPBLength);
1044	>	Move(DPB[1], FDPB[0], FDPBLength);
1045	>	end;
1046	>	finally
1047	>	TempDBParams.Free;
1048	>	end;
1049	>	if Call(isc_attach_database(StatusVector, Length(aDBName),
1050	>	PChar(aDBName), @FHandle,
1051	>	FDPBLength, FDPB), False) > 0 then
1052	>	begin
1053	>	FHandle := nil;
1054	>	IBDataBaseError;
1055	>	end;
1056	>	if not (csDesigning in ComponentState) then
1057	>	FDBName := aDBName; {Synchronise at run time}
1058	>	FDBSQLDialect := GetDBSQLDialect;
1059	>	ValidateClientSQLDialect;
1060	>	for i := 0 to FSQLObjects.Count - 1 do
1061	>	begin
1062	>	if FSQLObjects[i] <> nil then
1063	>	SQLObjects[i].DoAfterDatabaseConnect;
1064	>	end;
1065	>	if not (csDesigning in ComponentState) then
1066	>	MonitorHook.DBConnect(Self);
1067	>	LoadCharSetInfo;
1068	>	end;
1069	>
1070	>	procedure TIBDataBase.RemoveSQLObject(Idx: Integer);
1071	>	var
1072	>	ds: TIBBase;
1073	>	begin
1074	>	if (Idx >= 0) and (FSQLObjects[Idx] <> nil) then
1075	>	begin
1076	>	ds := SQLObjects[Idx];
1077	>	FSQLObjects[Idx] := nil;
1078	>	ds.Database := nil;
1079	>	if (ds.owner is TDataSet) then
1080	>	FDataSets.Remove(TDataSet(ds.Owner));
1081	>	end;
1082	>	end;
1083	>
1084	>	procedure TIBDataBase.RemoveSQLObjects;
1085	>	var
1086	>	i: Integer;
1087	>	begin
1088	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1089	>	begin
1090	>	RemoveSQLObject(i);
1091	>	if (TIBBase(FSQLObjects[i]).owner is TDataSet) then
1092	>	FDataSets.Remove(TDataSet(TIBBase(FSQLObjects[i]).owner));
1093	>	end;
1094	>	end;
1095	>
1096	>	procedure TIBDataBase.RemoveTransaction(Idx: Integer);
1097	>	var
1098	>	TR: TIBTransaction;
1099	>	begin
1100	>	if ((Idx >= 0) and (FTransactions[Idx] <> nil)) then
1101	>	begin
1102	>	TR := Transactions[Idx];
1103	>	FTransactions[Idx] := nil;
1104	>	TR.RemoveDatabase(TR.FindDatabase(Self));
1105	>	if TR = FDefaultTransaction then
1106	>	FDefaultTransaction := nil;
1107	>	end;
1108	>	end;
1109	>
1110	>	procedure TIBDataBase.RemoveTransactions;
1111	>	var
1112	>	i: Integer;
1113	>	begin
1114	>	for i := 0 to FTransactions.Count - 1 do if FTransactions[i] <> nil then
1115	>	RemoveTransaction(i);
1116	>	end;
1117	>
1118	>	procedure TIBDataBase.SetDatabaseName( const Value: TIBFileName);
1119	>	begin
1120	>	if FDBName <> Value then
1121	>	begin
1122	>	EnsureInactive;
1123	>	CheckInactive;
1124	>	FDBName := Value;
1125	>	end;
1126	>	end;
1127	>
1128	>	procedure TIBDataBase.SetDBParamByDPB( const Idx: Integer; Value: String);
1129	>	var
1130	>	ConstIdx: Integer;
1131	>	begin
1132	>	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
1133	>	if (Value = '') then
1134	>	begin
1135	>	if ConstIdx <> -1 then
1136	>	Params.Delete(ConstIdx);
1137	>	end
1138	>	else
1139	>	begin
1140	>	if (ConstIdx = -1) then
1141	>	Params.Add(DPBConstantNames[Idx] + '=' + Value)
1142	>	else
1143	>	Params[ConstIdx] := DPBConstantNames[Idx] + '=' + Value;
1144	>	end;
1145	>	end;
1146	>
1147	>	procedure TIBDataBase.SetDBParams(Value: TStrings);
1148	>	begin
1149	>	FDBParams.Assign(Value);
1150	>	end;
1151	>
1152	>	procedure TIBDataBase.SetDefaultTransaction(Value: TIBTransaction);
1153	>	var
1154	>	i: Integer;
1155	>	begin
1156	>	if (FDefaultTransaction <> nil) and (FDefaultTransaction <> Value) then
1157	>	begin
1158	>	i := FindTransaction(FDefaultTransaction);
1159	>	if (i <> -1) and (FDefaultTransaction.DefaultDatabase <> self) then
1160	>	RemoveTransaction(i);
1161	>	end;
1162	>	if (Value <> nil) and (FDefaultTransaction <> Value) then
1163	>	begin
1164	>	Value.AddDatabase(Self);
1165	>	AddTransaction(Value);
1166	>	end;
1167	>	FDefaultTransaction := Value;
1168	>	end;
1169	>
1170	>	procedure TIBDataBase.SetHandle(Value: TISC_DB_HANDLE);
1171	>	begin
1172	>	if HandleIsShared then
1173	>	Close
1174	>	else
1175	>	CheckInactive;
1176	>	FHandle := Value;
1177	>	FHandleIsShared := (Value <> nil);
1178	>	end;
1179	>
1180	>	procedure TIBDataBase.SetIdleTimer(Value: Integer);
1181	>	begin
1182	>	if Value < 0 then
1183	>	IBError(ibxeTimeoutNegative, [nil])
1184	>	else
1185	>	if (Value = 0) then
1186	>	begin
1187	>	FTimer.Enabled := False;
1188	>	FTimer.Interval := 0;
1189	>	end
1190	>	else
1191	>	if (Value > 0) then
1192	>	begin
1193	>	FTimer.Interval := Value;
1194	>	if not (csDesigning in ComponentState) then
1195	>	FTimer.Enabled := True;
1196	>	end;
1197	>	end;
1198	>
1199	>	function TIBDataBase.TestConnected: Boolean;
1200	>	var
1201	>	DatabaseInfo: TIBDatabaseInfo;
1202	>	begin
1203	>	result := Connected;
1204	>	if result then
1205	>	begin
1206	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1207	>	try
1208	>	DatabaseInfo.Database := self;
1209	>	{ poke the server to see if connected }
1210	>	if DatabaseInfo.BaseLevel = 0 then ;
1211	>	DatabaseInfo.Free;
1212	>	except
1213	>	ForceClose;
1214	>	result := False;
1215	>	DatabaseInfo.Free;
1216	>	end;
1217	>	end;
1218	>	end;
1219	>
1220	>	procedure TIBDataBase.TimeoutConnection(Sender: TObject);
1221	>	begin
1222	>	if Connected then
1223	>	begin
1224	>	if FCanTimeout then
1225	>	begin
1226	>	ForceClose;
1227	>	if Assigned(FOnIdleTimer) then
1228	>	FOnIdleTimer(Self);
1229	>	end
1230	>	else
1231	>	FCanTimeout := True;
1232	>	end;
1233	>	end;
1234	>
1235	>	function TIBDataBase.GetIsReadOnly: Boolean;
1236	>	var
1237	>	DatabaseInfo: TIBDatabaseInfo;
1238	>	begin
1239	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1240	>	DatabaseInfo.Database := self;
1241	>	if (DatabaseInfo.ODSMajorVersion < 10) then
1242	>	result := false
1243	>	else
1244	>	begin
1245	>	if (DatabaseInfo.ReadOnly = 0) then
1246	>	result := false
1247	>	else
1248	>	result := true;
1249	>	end;
1250	>	DatabaseInfo.Free;
1251	>	end;
1252	>
1253	>	function TIBDataBase.GetSQLDialect: Integer;
1254	>	begin
1255	>	Result := FSQLDialect;
1256	>	end;
1257	>
1258	>
1259	>	procedure TIBDataBase.SetSQLDialect( const Value: Integer);
1260	>	begin
1261	>	if (Value < 1) then IBError(ibxeSQLDialectInvalid, [nil]);
1262	>	if ((FHandle = nil) or (Value <= FDBSQLDialect))  then
1263	>	FSQLDialect := Value
1264	>	else
1265	>	IBError(ibxeSQLDialectInvalid, [nil]);
1266	>	end;
1267	>
1268	>	function TIBDataBase.GetDBSQLDialect: Integer;
1269	>	var
1270	>	DatabaseInfo: TIBDatabaseInfo;
1271	>	begin
1272	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1273	>	DatabaseInfo.Database := self;
1274	>	result := DatabaseInfo.DBSQLDialect;
1275	>	DatabaseInfo.Free;
1276	>	end;
1277	>
1278	>	procedure TIBDataBase.ValidateClientSQLDialect;
1279	>	begin
1280	>	if (FDBSQLDialect < FSQLDialect) then
1281	>	begin
1282	>	FSQLDialect := FDBSQLDialect;
1283	>	if Assigned (FOnDialectDowngradeWarning) then
1284	>	FOnDialectDowngradeWarning(self);
1285	>	end;
1286	>	end;
1287	>
1288	>	procedure TIBDataBase.ApplyUpdates( const DataSets: array of TDataSet);
1289	>	var
1290	>	I: Integer;
1291	>	DS: TIBCustomDataSet;
1292	>	TR: TIBTransaction;
1293	>	begin
1294	>	TR := nil;
1295	>	for I := 0 to High(DataSets) do
1296	>	begin
1297	>	DS := TIBCustomDataSet(DataSets[I]);
1298	>	if DS.Database <> Self then
1299	>	IBError(ibxeUpdateWrongDB, [nil]);
1300	>	if TR = nil then
1301	>	TR := DS.Transaction;
1302	>	if (DS.Transaction <> TR) or (TR = nil) then
1303	>	IBError(ibxeUpdateWrongTR, [nil]);
1304	>	end;
1305	>	TR.CheckInTransaction;
1306	>	for I := 0 to High(DataSets) do
1307	>	begin
1308	>	DS := TIBCustomDataSet(DataSets[I]);
1309	>	DS.ApplyUpdates;
1310	>	end;
1311	>	TR.CommitRetaining;
1312	>	end;
1313	>
1314	>	procedure TIBDataBase.CloseDataSets;
1315	>	var
1316	>	i: Integer;
1317	>	begin
1318	>	for i := 0 to DataSetCount - 1 do
1319	>	if (DataSets[i] <> nil) then
1320	>	DataSets[i].close;
1321	>	end;
1322	>
1323	>	function TIBDataBase.GetDataset(Index: longint): TDataset;
1324	>	begin
1325	>	if (Index >= 0) and (Index < FDataSets.Count) then
1326	>	Result := TDataSet(FDataSets[Index])
1327	>	else
1328	>	raise Exception.Create('Invalid Index to DataSets');
1329	>	end;
1330	>
1331	>	function TIBDataBase.GetDataSetCount: Longint;
1332	>	begin
1333	>	Result := FDataSets.Count;
1334	>	end;
1335	>
1336	>	procedure TIBDataBase.ReadState(Reader: TReader);
1337	>	begin
1338	>	FDBParams.Clear;
1339	>	inherited ReadState(Reader);
1340	>	end;
1341	>
1342	>	procedure TIBDataBase.SetConnected(Value: boolean);
1343	>	begin
1344	>	if StreamedConnected and not AllowStreamedConnected then
1345	>	begin
1346	>	StreamedConnected := false;
1347	>	Value := false
1348	>	end;
1349	>	inherited SetConnected(Value);
1350	>	end;
1351	>
1352	>	procedure TIBDataBase.GetFieldNames( const TableName: string; List: TStrings);
1353	>	var
1354	>	Query: TIBSQL;
1355	>	begin
1356	>	if TableName = '' then
1357	>	IBError(ibxeNoTableName, [nil]);
1358	>	if not Connected then
1359	>	Open;
1360	>	if not FInternalTransaction.Active then
1361	>	FInternalTransaction.StartTransaction;
1362	>	Query := TIBSQL.Create(self);
1363	>	try
1364	>	Query.GoToFirstRecordOnExecute := False;
1365	>	Query.Database := Self;
1366	>	Query.Transaction := FInternalTransaction;
1367	>	Query.SQL.Text := 'Select R.RDB$FIELD_NAME ' + {do not localize}
1368	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
1369	>	'where R.RDB$RELATION_NAME = ' + {do not localize}
1370	>	'''' +
1371	>	FormatIdentifierValue(SQLDialect, TableName) +
1372	>	''' ' +
1373	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '; {do not localize}
1374	>	Query.Prepare;
1375	>	Query.ExecQuery;
1376	>	with List do
1377	>	begin
1378	>	BeginUpdate;
1379	>	try
1380	>	Clear;
1381	>	while (not Query.EOF) and (Query.Next <> nil) do
1382	>	List.Add(TrimRight(Query.Current.ByName('RDB$FIELD_NAME').AsString)); {do not localize}
1383	>	finally
1384	>	EndUpdate;
1385	>	end;
1386	>	end;
1387	>	finally
1388	>	Query.free;
1389	>	FInternalTransaction.Commit;
1390	>	end;
1391	>	end;
1392	>
1393	>	procedure TIBDataBase.GetTableNames(List: TStrings; SystemTables: Boolean);
1394	>	var
1395	>	Query : TIBSQL;
1396	>	begin
1397	>	if not (csReading in ComponentState) then
1398	>	begin
1399	>	if not Connected then
1400	>	Open;
1401	>	if not FInternalTransaction.Active then
1402	>	FInternalTransaction.StartTransaction;
1403	>	Query := TIBSQL.Create(self);
1404	>	try
1405	>	Query.GoToFirstRecordOnExecute := False;
1406	>	Query.Database := Self;
1407	>	Query.Transaction := FInternalTransaction;
1408	>	if SystemTables then
1409	>	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1410	>	' where RDB$VIEW_BLR is NULL' {do not localize}
1411	>	else
1412	>	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1413	>	' where RDB$VIEW_BLR is NULL and RDB$SYSTEM_FLAG = 0'; {do not localize}
1414	>	Query.Prepare;
1415	>	Query.ExecQuery;
1416	>	with List do
1417	>	begin
1418	>	BeginUpdate;
1419	>	try
1420	>	Clear;
1421	>	while (not Query.EOF) and (Query.Next <> nil) do
1422	>	List.Add(TrimRight(Query.Current[0].AsString));
1423	>	finally
1424	>	EndUpdate;
1425	>	end;
1426	>	end;
1427	>	finally
1428	>	Query.Free;
1429	>	FInternalTransaction.Commit;
1430	>	end;
1431	>	end;
1432	>	end;
1433	>
1434	>	{ TIBTransaction }
1435	>
1436	>	constructor TIBTransaction.Create(AOwner: TComponent);
1437	>	begin
1438	>	inherited Create(AOwner);
1439	>	FIBLoaded := False;
1440	>	CheckIBLoaded;
1441	>	FIBLoaded := True;
1442	>	CheckIBLoaded;
1443	>	FDatabases := TList.Create;
1444	>	FSQLObjects := TList.Create;
1445	>	FHandle := nil;
1446	>	FTPB := nil;
1447	>	FTPBLength := 0;
1448	>	FTRParams := TStringList.Create;
1449	>	FTRParamsChanged := True;
1450	>	TStringList(FTRParams).OnChange := TRParamsChange;
1451	>	TStringList(FTRParams).OnChanging := TRParamsChanging;
1452	>	FTimer := TFPTimer.Create(Self);
1453	>	FTimer.Enabled := False;
1454	>	FTimer.Interval := 0;
1455	>	FTimer.OnTimer := TimeoutTransaction;
1456	>	FDefaultAction := taCommit;
1457	>	end;
1458	>
1459	>	destructor TIBTransaction.Destroy;
1460	>	var
1461	>	i: Integer;
1462	>	begin
1463	>	if FIBLoaded then
1464	>	begin
1465	>	if InTransaction then
1466	>	EndTransaction(FDefaultAction, True);
1467	>	for i := 0 to FSQLObjects.Count - 1 do
1468	>	if FSQLObjects[i] <> nil then
1469	>	SQLObjects[i].DoTransactionFree;
1470	>	RemoveSQLObjects;
1471	>	RemoveDatabases;
1472	>	FreeMem(FTPB);
1473	>	FTPB := nil;
1474	>	FTRParams.Free;
1475	>	FSQLObjects.Free;
1476	>	FDatabases.Free;
1477	>	end;
1478	>	inherited Destroy;
1479	>	end;
1480	>
1481	>	function TIBTransaction.Call(ErrCode: ISC_STATUS;
1482	>	RaiseError: Boolean): ISC_STATUS;
1483	>	var
1484	>	i: Integer;
1485	>	begin
1486	>	result := ErrCode;
1487	>	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1488	>	Databases[i].FCanTimeout := False;
1489	>	FCanTimeout := False;
1490	>	if RaiseError and (result > 0) then
1491	>	IBDataBaseError;
1492	>	end;
1493	>
1494	>	procedure TIBTransaction.CheckDatabasesInList;
1495	>	begin
1496	>	if GetDatabaseCount = 0 then
1497	>	IBError(ibxeNoDatabasesInTransaction, [nil]);
1498	>	end;
1499	>
1500	>	procedure TIBTransaction.CheckInTransaction;
1501	>	begin
1502	>	if FStreamedActive and (not InTransaction) then
1503	>	Loaded;
1504	>	if (FHandle = nil) then
1505	>	IBError(ibxeNotInTransaction, [nil]);
1506	>	end;
1507	>
1508	>	procedure TIBTransaction.DoBeforeTransactionEnd;
1509	>	begin
1510	>	if Assigned(FBeforeTransactionEnd) then
1511	>	FBeforeTransactionEnd(self);
1512	>	end;
1513	>
1514	>	procedure TIBTransaction.DoAfterTransactionEnd;
1515	>	begin
1516	>	if Assigned(FAfterTransactionEnd) then
1517	>	FAfterTransactionEnd(self);
1518	>	end;
1519	>
1520	>	procedure TIBTransaction.DoOnStartTransaction;
1521	>	begin
1522	>	if assigned(FOnStartTransaction) then
1523	>	OnStartTransaction(self);
1524	>	end;
1525	>
1526	>	procedure TIBTransaction.DoAfterExecQuery(Sender: TObject);
1527	>	begin
1528	>	if assigned(FAfterExecQuery) then
1529	>	AfterExecQuery(Sender);
1530	>	end;
1531	>
1532	>	procedure TIBTransaction.DoAfterEdit(Sender: TObject);
1533	>	begin
1534	>	if assigned(FAfterEdit) then
1535	>	AfterEdit(Sender);
1536	>	end;
1537	>
1538	>	procedure TIBTransaction.DoAfterDelete(Sender: TObject);
1539	>	begin
1540	>	if assigned(FAfterDelete) then
1541	>	AfterDelete(Sender);
1542	>	end;
1543	>
1544	>	procedure TIBTransaction.DoAfterInsert(Sender: TObject);
1545	>	begin
1546	>	if assigned(FAfterInsert) then
1547	>	AfterInsert(Sender);
1548	>	end;
1549	>
1550	>	procedure TIBTransaction.DoAfterPost(Sender: TObject);
1551	>	begin
1552	>	if assigned(FAfterPost) then
1553	>	AfterPost(Sender);
1554	>	end;
1555	>
1556	>	procedure TIBTransaction.EnsureNotInTransaction;
1557	>	begin
1558	>	if csDesigning in ComponentState then
1559	>	begin
1560	>	if FHandle <> nil then
1561	>	Rollback;
1562	>	end;
1563	>	end;
1564	>
1565	>	procedure TIBTransaction.CheckNotInTransaction;
1566	>	begin
1567	>	if (FHandle <> nil) then
1568	>	IBError(ibxeInTransaction, [nil]);
1569	>	end;
1570	>
1571	>	function TIBTransaction.AddDatabase(db: TIBDatabase): Integer;
1572	>	var
1573	>	i: Integer;
1574	>	NilFound: Boolean;
1575	>	begin
1576	>	i := FindDatabase(db);
1577	>	if i <> -1 then
1578	>	begin
1579	>	result := i;
1580	>	exit;
1581	>	end;
1582	>	NilFound := False;
1583	>	i := 0;
1584	>	while (not NilFound) and (i < FDatabases.Count) do
1585	>	begin
1586	>	NilFound := (FDatabases[i] = nil);
1587	>	if (not NilFound) then
1588	>	Inc(i);
1589	>	end;
1590	>	if (NilFound) then
1591	>	begin
1592	>	FDatabases[i] := db;
1593	>	result := i;
1594	>	end
1595	>	else
1596	>	begin
1597	>	result := FDatabases.Count;
1598	>	FDatabases.Add(db);
1599	>	end;
1600	>	end;
1601	>
1602	>	function TIBTransaction.AddSQLObject(ds: TIBBase): Integer;
1603	>	begin
1604	>	result := 0;
1605	>	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
1606	>	Inc(result);
1607	>	if (result = FSQLObjects.Count) then
1608	>	FSQLObjects.Add(ds)
1609	>	else
1610	>	FSQLObjects[result] := ds;
1611	>	end;
1612	>
1613	>	procedure TIBTransaction.Commit;
1614	>	begin
1615	>	EndTransaction(TACommit, False);
1616	>	end;
1617	>
1618	>	procedure TIBTransaction.CommitRetaining;
1619	>	begin
1620	>	EndTransaction(TACommitRetaining, False);
1621	>	end;
1622	>
1623	>	procedure TIBTransaction.EndTransaction(Action: TTransactionAction;
1624	>	Force: Boolean);
1625	>	var
1626	>	status: ISC_STATUS;
1627	>	i: Integer;
1628	>	begin
1629	>	CheckInTransaction;
1630	>	if FInEndTransaction then Exit;
1631	>	FInEndTransaction := true;
1632	>	FEndAction := Action;
1633	>	try
1634	>	case Action of
1635	>	TARollback, TACommit:
1636	>	begin
1637	>	if (HandleIsShared) and
1638	>	(Action <> FDefaultAction) and
1639	>	(not Force) then
1640	>	IBError(ibxeCantEndSharedTransaction, [nil]);
1641	>	DoBeforeTransactionEnd;
1642	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1643	>	SQLObjects[i].DoBeforeTransactionEnd(Action);
1644	>	if InTransaction then
1645	>	begin
1646	>	if HandleIsShared then
1647	>	begin
1648	>	FHandle := nil;
1649	>	FHandleIsShared := False;
1650	>	status := 0;
1651	>	end
1652	>	else
1653	>	if (Action = TARollback) then
1654	>	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False)
1655	>	else
1656	>	status := Call(isc_commit_transaction(StatusVector, @FHandle), False);
1657	>	if ((Force) and (status > 0)) then
1658	>	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False);
1659	>	if Force then
1660	>	FHandle := nil
1661	>	else
1662	>	if (status > 0) then
1663	>	IBDataBaseError;
1664	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1665	>	SQLObjects[i].DoAfterTransactionEnd;
1666	>	DoAfterTransactionEnd;
1667	>	end;
1668	>	end;
1669	>	TACommitRetaining:
1670	>	Call(isc_commit_retaining(StatusVector, @FHandle), True);
1671	>	TARollbackRetaining:
1672	>	Call(isc_rollback_retaining(StatusVector, @FHandle), True);
1673	>	end;
1674	>	if not (csDesigning in ComponentState) then
1675	>	begin
1676	>	case Action of
1677	>	TACommit:
1678	>	MonitorHook.TRCommit(Self);
1679	>	TARollback:
1680	>	MonitorHook.TRRollback(Self);
1681	>	TACommitRetaining:
1682	>	MonitorHook.TRCommitRetaining(Self);
1683	>	TARollbackRetaining:
1684	>	MonitorHook.TRRollbackRetaining(Self);
1685	>	end;
1686	>	end;
1687	>	finally
1688	>	FInEndTransaction := false
1689	>	end;
1690	>	end;
1691	>
1692	>	function TIBTransaction.GetDatabase(Index: Integer): TIBDatabase;
1693	>	begin
1694	>	result := FDatabases[Index];
1695	>	end;
1696	>
1697	>	function TIBTransaction.GetDatabaseCount: Integer;
1698	>	var
1699	>	i, Cnt: Integer;
1700	>	begin
1701	>	result := 0;
1702	>	Cnt := FDatabases.Count - 1;
1703	>	for i := 0 to Cnt do if FDatabases[i] <> nil then
1704	>	Inc(result);
1705	>	end;
1706	>
1707	>	function TIBTransaction.GetSQLObject(Index: Integer): TIBBase;
1708	>	begin
1709	>	result := FSQLObjects[Index];
1710	>	end;
1711	>
1712	>	function TIBTransaction.GetSQLObjectCount: Integer;
1713	>	var
1714	>	i, Cnt: Integer;
1715	>	begin
1716	>	result := 0;
1717	>	Cnt := FSQLObjects.Count - 1;
1718	>	for i := 0 to Cnt do if FSQLObjects[i] <> nil then
1719	>	Inc(result);
1720	>	end;
1721	>
1722	>	function TIBTransaction.GetInTransaction: Boolean;
1723	>	begin
1724	>	result := (FHandle <> nil);
1725	>	end;
1726	>
1727	>	function TIBTransaction.FindDatabase(db: TIBDatabase): Integer;
1728	>	var
1729	>	i: Integer;
1730	>	begin
1731	>	result := -1;
1732	>	for i := 0 to FDatabases.Count - 1 do
1733	>	if db = TIBDatabase(FDatabases[i]) then
1734	>	begin
1735	>	result := i;
1736	>	break;
1737	>	end;
1738	>	end;
1739	>
1740	>	function TIBTransaction.FindDefaultDatabase: TIBDatabase;
1741	>	var
1742	>	i: Integer;
1743	>	begin
1744	>	result := FDefaultDatabase;
1745	>	if result = nil then
1746	>	begin
1747	>	for i := 0 to FDatabases.Count - 1 do
1748	>	if (TIBDatabase(FDatabases[i]) <> nil) and
1749	>	(TIBDatabase(FDatabases[i]).DefaultTransaction = self) then
1750	>	begin
1751	>	result := TIBDatabase(FDatabases[i]);
1752	>	break;
1753	>	end;
1754	>	end;
1755	>	end;
1756	>
1757	>	function TIBTransaction.GetEndAction: TTransactionAction;
1758	>	begin
1759	>	if FInEndTransaction then
1760	>	Result := FEndAction
1761	>	else
1762	>	IBError(ibxeIB60feature, [nil])
1763	>	end;
1764	>
1765	>
1766	>	function TIBTransaction.GetIdleTimer: Integer;
1767	>	begin
1768	>	result := FTimer.Interval;
1769	>	end;
1770	>
1771	>	procedure TIBTransaction.Loaded;
1772	>	begin
1773	>	inherited Loaded;
1774	>	end;
1775	>
1776	>	procedure TIBTransaction.BeforeDatabaseDisconnect(DB: TIBDatabase);
1777	>	begin
1778	>	if InTransaction then
1779	>	EndTransaction(FDefaultAction, True);
1780	>	end;
1781	>
1782	>	procedure TIBTransaction.RemoveDatabase(Idx: Integer);
1783	>	var
1784	>	DB: TIBDatabase;
1785	>	begin
1786	>	if ((Idx >= 0) and (FDatabases[Idx] <> nil)) then
1787	>	begin
1788	>	DB := Databases[Idx];
1789	>	FDatabases[Idx] := nil;
1790	>	DB.RemoveTransaction(DB.FindTransaction(Self));
1791	>	if DB = FDefaultDatabase then
1792	>	FDefaultDatabase := nil;
1793	>	end;
1794	>	end;
1795	>
1796	>	procedure TIBTransaction.RemoveDatabases;
1797	>	var
1798	>	i: Integer;
1799	>	begin
1800	>	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1801	>	RemoveDatabase(i);
1802	>	end;
1803	>
1804	>	procedure TIBTransaction.RemoveSQLObject(Idx: Integer);
1805	>	var
1806	>	ds: TIBBase;
1807	>	begin
1808	>	if ((Idx >= 0) and (FSQLObjects[Idx] <> nil)) then
1809	>	begin
1810	>	ds := SQLObjects[Idx];
1811	>	FSQLObjects[Idx] := nil;
1812	>	ds.Transaction := nil;
1813	>	end;
1814	>	end;
1815	>
1816	>	procedure TIBTransaction.RemoveSQLObjects;
1817	>	var
1818	>	i: Integer;
1819	>	begin
1820	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1821	>	RemoveSQLObject(i);
1822	>	end;
1823	>
1824	>	procedure TIBTransaction.Rollback;
1825	>	begin
1826	>	EndTransaction(TARollback, False);
1827	>	end;
1828	>
1829	>	procedure TIBTransaction.RollbackRetaining;
1830	>	begin
1831	>	EndTransaction(TARollbackRetaining, False);
1832	>	end;
1833	>
1834	>	procedure TIBTransaction.SetActive(Value: Boolean);
1835	>	begin
1836	>	if csReading in ComponentState then
1837	>	FStreamedActive := Value
1838	>	else
1839	>	if Value and not InTransaction then
1840	>	StartTransaction
1841	>	else
1842	>	if not Value and InTransaction then
1843	>	Rollback;
1844	>	end;
1845	>
1846	>	procedure TIBTransaction.SetDefaultAction(Value: TTransactionAction);
1847	>	begin
1848	>	(*  if (Value = taRollbackRetaining) and (GetIBClientVersion < 6) then
1849	>	IBError(ibxeIB60feature, [nil]);*)
1850	>	FDefaultAction := Value;
1851	>	end;
1852	>
1853	>	procedure TIBTransaction.SetDefaultDatabase(Value: TIBDatabase);
1854	>	var
1855	>	i: integer;
1856	>	begin
1857	>	if (FDefaultDatabase <> nil) and (FDefaultDatabase <> Value) then
1858	>	begin
1859	>	i := FDefaultDatabase.FindTransaction(self);
1860	>	if (i <> -1) then
1861	>	FDefaultDatabase.RemoveTransaction(i);
1862	>	end;
1863	>	if (Value <> nil) and (FDefaultDatabase <> Value) then
1864	>	begin
1865	>	Value.AddTransaction(Self);
1866	>	AddDatabase(Value);
1867	>	for i := 0 to FSQLObjects.Count - 1 do
1868	>	if (FSQLObjects[i] <> nil) and
1869	>	(TIBBase(FSQLObjects[i]).Database = nil) then
1870	>	SetObjectProp(TIBBase(FSQLObjects[i]).Owner, 'Database', Value);
1871	>	end;
1872	>	FDefaultDatabase := Value;
1873	>	end;
1874	>
1875	>	procedure TIBTransaction.SetHandle(Value: TISC_TR_HANDLE);
1876	>	begin
1877	>	if (HandleIsShared) then
1878	>	EndTransaction(DefaultAction, True)
1879	>	else
1880	>	CheckNotInTransaction;
1881	>	FHandle := Value;
1882	>	FHandleIsShared := (Value <> nil);
1883	>	end;
1884	>
1885	>	procedure TIBTransaction.Notification( AComponent: TComponent;
1886	>	Operation: TOperation);
1887	>	var
1888	>	i: Integer;
1889	>	begin
1890	>	inherited Notification( AComponent, Operation);
1891	>	if (Operation = opRemove) and (AComponent = FDefaultDatabase) then
1892	>	begin
1893	>	i := FindDatabase(FDefaultDatabase);
1894	>	if (i <> -1) then
1895	>	RemoveDatabase(i);
1896	>	FDefaultDatabase := nil;
1897	>	end;
1898	>	end;
1899	>
1900	>	procedure TIBTransaction.SetIdleTimer(Value: Integer);
1901	>	begin
1902	>	if Value < 0 then
1903	>	IBError(ibxeTimeoutNegative, [nil])
1904	>	else
1905	>	if (Value = 0) then
1906	>	begin
1907	>	FTimer.Enabled := False;
1908	>	FTimer.Interval := 0;
1909	>	end
1910	>	else
1911	>	if (Value > 0) then
1912	>	begin
1913	>	FTimer.Interval := Value;
1914	>	if not (csDesigning in ComponentState) then
1915	>	FTimer.Enabled := True;
1916	>	end;
1917	>	end;
1918	>
1919	>	procedure TIBTransaction.SetTRParams(Value: TStrings);
1920	>	begin
1921	>	FTRParams.Assign(Value);
1922	>	end;
1923	>
1924	>	procedure TIBTransaction.StartTransaction;
1925	>	var
1926	>	pteb: PISC_TEB_ARRAY;
1927	>	TPB: String;
1928	>	i: Integer;
1929	>	begin
1930	>	CheckNotInTransaction;
1931	>	CheckDatabasesInList;
1932	>	for i := 0 to FDatabases.Count - 1 do
1933	>	if  FDatabases[i] <> nil then
1934	>	begin
1935	>	with TIBDatabase(FDatabases[i]) do
1936	>	if not Connected then
1937	>	if FStreamedConnected then
1938	>	begin
1939	>	Open;
1940	>	FStreamedConnected := False;
1941	>	end
1942	>	else
1943	>	IBError(ibxeDatabaseClosed, [nil]);
1944	>	end;
1945	>	if FTRParamsChanged then
1946	>	begin
1947	>	FTRParamsChanged := False;
1948	>	GenerateTPB(FTRParams, TPB, FTPBLength);
1949	>	if FTPBLength > 0 then
1950	>	begin
1951	>	IBAlloc(FTPB, 0, FTPBLength);
1952	>	Move(TPB[1], FTPB[0], FTPBLength);
1953	>	end;
1954	>	end;
1955	>
1956	>	pteb := nil;
1957	>	IBAlloc(pteb, 0, DatabaseCount * SizeOf(TISC_TEB));
1958	>	try
1959	>	for i := 0 to DatabaseCount - 1 do if Databases[i] <> nil then
1960	>	begin
1961	>	pteb^[i].db_handle := @(Databases[i].Handle);
1962	>	pteb^[i].tpb_length := FTPBLength;
1963	>	pteb^[i].tpb_address := FTPB;
1964	>	end;
1965	>	if Call(isc_start_multiple(StatusVector, @FHandle,
1966	>	DatabaseCount, PISC_TEB(pteb)), False) > 0 then
1967	>	begin
1968	>	FHandle := nil;
1969	>	IBDataBaseError;
1970	>	end;
1971	>	if not (csDesigning in ComponentState) then
1972	>	MonitorHook.TRStart(Self);
1973	>	finally
1974	>	FreeMem(pteb);
1975	>	end;
1976	>	DoOnStartTransaction;
1977	>	end;
1978	>
1979	>	procedure TIBTransaction.TimeoutTransaction(Sender: TObject);
1980	>	begin
1981	>	if InTransaction then
1982	>	begin
1983	>	if FCanTimeout then
1984	>	begin
1985	>	EndTransaction(FDefaultAction, True);
1986	>	if Assigned(FOnIdleTimer) then
1987	>	FOnIdleTimer(Self);
1988	>	end
1989	>	else
1990	>	FCanTimeout := True;
1991	>	end;
1992	>	end;
1993	>
1994	>	procedure TIBTransaction.TRParamsChange(Sender: TObject);
1995	>	begin
1996	>	FTRParamsChanged := True;
1997	>	end;
1998	>
1999	>	procedure TIBTransaction.TRParamsChanging(Sender: TObject);
2000	>	begin
2001	>	EnsureNotInTransaction;
2002	>	CheckNotInTransaction;
2003	>	end;
2004	>
2005	>	{ TIBBase }
2006	>	constructor TIBBase.Create(AOwner: TObject);
2007	>	begin
2008	>	FOwner := AOwner;
2009	>	end;
2010	>
2011	>	destructor TIBBase.Destroy;
2012	>	begin
2013	>	SetDatabase(nil);
2014	>	SetTransaction(nil);
2015	>	inherited Destroy;
2016	>	end;
2017	>
2018	>	function TIBBase.GetCharSetSize(CharSetID: integer): integer;
2019	>	begin
2020	>	if (CharSetID >= 0) and (CharSetID < Length(Database.FCharSetSizes)) then
2021	>	Result := Database.FCharSetSizes[CharSetID]
2022	>	else
2023	>	Result := 1; {Unknown character set}
2024	>	end;
2025	>
2026	>	procedure TIBBase.HandleException(Sender: TObject);
2027	>	begin
2028	>	if assigned(Database) then
2029	>	Database.HandleException(Sender)
2030	>	else
2031	>	SysUtils.ShowException(ExceptObject,ExceptAddr);
2032	>	end;
2033	>
2034	>	procedure TIBBase.SetCursor;
2035	>	begin
2036	>	if Assigned(Database) and not Database.SQLHourGlass then
2037	>	Exit;
2038	>	if assigned(IBGUIInterface) then
2039	>	IBGUIInterface.SetCursor;
2040	>	end;
2041	>
2042	>	procedure TIBBase.RestoreCursor;
2043	>	begin
2044	>	if Assigned(Database) and not Database.SQLHourGlass then
2045	>	Exit;
2046	>	if assigned(IBGUIInterface) then
2047	>	IBGUIInterface.RestoreCursor;
2048	>	end;
2049	>
2050	>	procedure TIBBase.CheckDatabase;
2051	>	begin
2052	>	if (FDatabase = nil) then
2053	>	IBError(ibxeDatabaseNotAssigned, [nil]);
2054	>	FDatabase.CheckActive;
2055	>	end;
2056	>
2057	>	procedure TIBBase.CheckTransaction;
2058	>	begin
2059	>	if FTransaction = nil then
2060	>	IBError(ibxeTransactionNotAssigned, [nil]);
2061	>	FTransaction.CheckInTransaction;
2062	>	end;
2063	>
2064	>	function TIBBase.GetDBHandle: PISC_DB_HANDLE;
2065	>	begin
2066	>	CheckDatabase;
2067	>	result := @FDatabase.Handle;
2068	>	end;
2069	>
2070	>	function TIBBase.GetTRHandle: PISC_TR_HANDLE;
2071	>	begin
2072	>	CheckTransaction;
2073	>	result := @FTransaction.Handle;
2074	>	end;
2075	>
2076	>	procedure TIBBase.DoBeforeDatabaseConnect(DBParams: TStrings; var DBName: string
2077	>	);
2078	>	begin
2079	>	if assigned(FBeforeDatabaseConnect) then
2080	>	BeforeDatabaseConnect(self,DBParams,DBName);
2081	>	end;
2082	>
2083	>	procedure TIBBase.DoAfterDatabaseConnect;
2084	>	begin
2085	>	if assigned(FAfterDatabaseConnect) then
2086	>	AfterDatabaseConnect(self);
2087	>	end;
2088	>
2089	>	procedure TIBBase.DoBeforeDatabaseDisconnect;
2090	>	begin
2091	>	if Assigned(BeforeDatabaseDisconnect) then
2092	>	BeforeDatabaseDisconnect(Self);
2093	>	end;
2094	>
2095	>	procedure TIBBase.DoAfterDatabaseDisconnect;
2096	>	begin
2097	>	if Assigned(AfterDatabaseDisconnect) then
2098	>	AfterDatabaseDisconnect(Self);
2099	>	end;
2100	>
2101	>	procedure TIBBase.DoDatabaseFree;
2102	>	begin
2103	>	if Assigned(OnDatabaseFree) then
2104	>	OnDatabaseFree(Self);
2105	>	SetDatabase(nil);
2106	>	SetTransaction(nil);
2107	>	end;
2108	>
2109	>	procedure TIBBase.DoBeforeTransactionEnd(Action: TTransactionAction);
2110	>	begin
2111	>	if Assigned(BeforeTransactionEnd) then
2112	>	BeforeTransactionEnd(Self,Action);
2113	>	end;
2114	>
2115	>	procedure TIBBase.DoAfterTransactionEnd;
2116	>	begin
2117	>	if Assigned(AfterTransactionEnd) then
2118	>	AfterTransactionEnd(Self);
2119	>	end;
2120	>
2121	>	procedure TIBBase.DoTransactionFree;
2122	>	begin
2123	>	if Assigned(OnTransactionFree) then
2124	>	OnTransactionFree(Self);
2125	>	FTransaction := nil;
2126	>	end;
2127	>
2128	>	procedure TIBBase.DoAfterExecQuery(Sender: TObject);
2129	>	begin
2130	>	if FTransaction <> nil then
2131	>	FTransaction.DoAfterExecQuery(Sender);
2132	>	end;
2133	>
2134	>	procedure TIBBase.DoAfterEdit(Sender: TObject);
2135	>	begin
2136	>	if FTransaction <> nil then
2137	>	FTransaction.DoAfterEdit(Sender);
2138	>	end;
2139	>
2140	>	procedure TIBBase.DoAfterDelete(Sender: TObject);
2141	>	begin
2142	>	if FTransaction <> nil then
2143	>	FTransaction.DoAfterDelete(Sender);
2144	>	end;
2145	>
2146	>	procedure TIBBase.DoAfterInsert(Sender: TObject);
2147	>	begin
2148	>	if FTransaction <> nil then
2149	>	FTransaction.DoAfterInsert(Sender);
2150	>	end;
2151	>
2152	>	procedure TIBBase.DoAfterPost(Sender: TObject);
2153	>	begin
2154	>	if FTransaction <> nil then
2155	>	FTransaction.DoAfterPost(Sender);
2156	>	end;
2157	>
2158	>	procedure TIBBase.SetDatabase(Value: TIBDatabase);
2159	>	begin
2160	>	if (FDatabase <> nil) then
2161	>	FDatabase.RemoveSQLObject(FIndexInDatabase);
2162	>	FDatabase := Value;
2163	>	if (FDatabase <> nil) then
2164	>	begin
2165	>	FIndexInDatabase := FDatabase.AddSQLObject(Self);
2166	>	if (FTransaction = nil) then
2167	>	Transaction := FDatabase.FindDefaultTransaction;
2168	>	end;
2169	>	end;
2170	>
2171	>	procedure TIBBase.SetTransaction(Value: TIBTransaction);
2172	>	begin
2173	>	if (FTransaction <> nil) then
2174	>	FTransaction.RemoveSQLObject(FIndexInTransaction);
2175	>	FTransaction := Value;
2176	>	if (FTransaction <> nil) then
2177	>	begin
2178	>	FIndexInTransaction := FTransaction.AddSQLObject(Self);
2179	>	if (FDatabase = nil) then
2180	>	Database := FTransaction.FindDefaultDatabase;
2181	>	end;
2182	>	end;
2183	>
2184	>	{ GenerateDPB -
2185	>	Given a string containing a textual representation
2186	>	of the database parameters, generate a database
2187	>	parameter buffer, and return it and its length
2188	>	in DPB and DPBLength, respectively. }
2189	>
2190	>	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
2191	>	var
2192	>	i, j, pval: Integer;
2193	>	DPBVal: UShort;
2194	>	ParamName, ParamValue: string;
2195	>	begin
2196	>	{ The DPB is initially empty, with the exception that
2197	>	the DPB version must be the first byte of the string. }
2198	>	DPBLength := 1;
2199	>	DPB := Char(isc_dpb_version1);
2200	>
2201	>	{Iterate through the textual database parameters, constructing
2202	>	a DPB on-the-fly }
2203	>	for i := 0 to sl.Count - 1 do
2204	>	begin
2205	>	{ Get the parameter's name and value from the list,
2206	>	and make sure that the name is all lowercase with
2207	>	no leading 'isc_dpb_' prefix
2208	>	}
2209	>	if (Trim(sl.Names[i]) = '') then
2210	>	continue;
2211	>	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
2212	>	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
2213	>	if (Pos(DPBPrefix, ParamName) = 1) then {mbcs ok}
2214	>	Delete(ParamName, 1, Length(DPBPrefix));
2215	>	{ We want to translate the parameter name to some Integer
2216	>	value. We do this by scanning through a list of known
2217	>	database parameter names (DPBConstantNames, defined above) }
2218	>	DPBVal := 0;
2219	>	{ Find the parameter }
2220	>	for j := 1 to isc_dpb_last_dpb_constant do
2221	>	if (ParamName = DPBConstantNames[j]) then
2222	>	begin
2223	>	DPBVal := j;
2224	>	break;
2225	>	end;
2226	>	{  A database parameter either contains a string value (case 1)
2227	>	or an Integer value (case 2)
2228	>	or no value at all (case 3)
2229	>	or an error needs to be generated (case else)  }
2230	>	case DPBVal of
2231	>	isc_dpb_user_name, isc_dpb_password, isc_dpb_password_enc,
2232	>	isc_dpb_sys_user_name, isc_dpb_license, isc_dpb_encrypt_key,
2233	>	isc_dpb_lc_messages, isc_dpb_lc_ctype,
2234	>	isc_dpb_sql_role_name, isc_dpb_sql_dialect:
2235	>	begin
2236	>	if DPBVal = isc_dpb_sql_dialect then
2237	>	ParamValue[1] := Char(Ord(ParamValue[1]) - 48);
2238	>	DPB := DPB +
2239	>	Char(DPBVal) +
2240	>	Char(Length(ParamValue)) +
2241	>	ParamValue;
2242	>	Inc(DPBLength, 2 + Length(ParamValue));
2243	>	end;
2244	>	isc_dpb_num_buffers, isc_dpb_dbkey_scope, isc_dpb_force_write,
2245	>	isc_dpb_no_reserve, isc_dpb_damaged, isc_dpb_verify:
2246	>	begin
2247	>	DPB := DPB +
2248	>	Char(DPBVal) +
2249	>	#1 +
2250	>	Char(StrToInt(ParamValue));
2251	>	Inc(DPBLength, 3);
2252	>	end;
2253	>	isc_dpb_sweep:
2254	>	begin
2255	>	DPB := DPB +
2256	>	Char(DPBVal) +
2257	>	#1 +
2258	>	Char(isc_dpb_records);
2259	>	Inc(DPBLength, 3);
2260	>	end;
2261	>	isc_dpb_sweep_interval:
2262	>	begin
2263	>	pval := StrToInt(ParamValue);
2264	>	DPB := DPB +
2265	>	Char(DPBVal) +
2266	>	#4 +
2267	>	PChar(@pval)[0] +
2268	>	PChar(@pval)[1] +
2269	>	PChar(@pval)[2] +
2270	>	PChar(@pval)[3];
2271	>	Inc(DPBLength, 6);
2272	>	end;
2273	>	isc_dpb_activate_shadow, isc_dpb_delete_shadow, isc_dpb_begin_log,
2274	>	isc_dpb_quit_log:
2275	>	begin
2276	>	DPB := DPB +
2277	>	Char(DPBVal) +
2278	>	#1 + #0;
2279	>	Inc(DPBLength, 3);
2280	>	end;
2281	>	else
2282	>	begin
2283	>	if (DPBVal > 0) and
2284	>	(DPBVal <= isc_dpb_last_dpb_constant) then
2285	>	IBError(ibxeDPBConstantNotSupported, [DPBConstantNames[DPBVal]])
2286	>	else
2287	>	IBError(ibxeDPBConstantUnknownEx, [sl.Names[i]]);
2288	>	end;
2289	>	end;
2290	>	end;
2291	>	end;
2292	>
2293	>	{ GenerateTPB -
2294	>	Given a string containing a textual representation
2295	>	of the transaction parameters, generate a transaction
2296	>	parameter buffer, and return it and its length in
2297	>	TPB and TPBLength, respectively. }
2298	>	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
2299	>	var
2300	>	i, j, TPBVal, ParamLength: Integer;
2301	>	ParamName, ParamValue: string;
2302	>	begin
2303	>	TPB := '';
2304	>	if (sl.Count = 0) then
2305	>	TPBLength := 0
2306	>	else
2307	>	begin
2308	>	TPBLength := sl.Count + 1;
2309	>	TPB := TPB + Char(isc_tpb_version3);
2310	>	end;
2311	>	for i := 0 to sl.Count - 1 do
2312	>	begin
2313	>	if (Trim(sl[i]) =  '') then
2314	>	begin
2315	>	Dec(TPBLength);
2316	>	Continue;
2317	>	end;
2318	>	if (Pos('=', sl[i]) = 0) then {mbcs ok}
2319	>	ParamName := LowerCase(sl[i]) {mbcs ok}
2320	>	else
2321	>	begin
2322	>	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
2323	>	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
2324	>	end;
2325	>	if (Pos(TPBPrefix, ParamName) = 1) then {mbcs ok}
2326	>	Delete(ParamName, 1, Length(TPBPrefix));
2327	>	TPBVal := 0;
2328	>	{ Find the parameter }
2329	>	for j := 1 to isc_tpb_last_tpb_constant do
2330	>	if (ParamName = TPBConstantNames[j]) then
2331	>	begin
2332	>	TPBVal := j;
2333	>	break;
2334	>	end;
2335	>	{ Now act on it }
2336	>	case TPBVal of
2337	>	isc_tpb_consistency, isc_tpb_exclusive, isc_tpb_protected,
2338	>	isc_tpb_concurrency, isc_tpb_shared, isc_tpb_wait, isc_tpb_nowait,
2339	>	isc_tpb_read, isc_tpb_write, isc_tpb_ignore_limbo,
2340	>	isc_tpb_read_committed, isc_tpb_rec_version, isc_tpb_no_rec_version:
2341	>	TPB := TPB + Char(TPBVal);
2342	>	isc_tpb_lock_read, isc_tpb_lock_write:
2343	>	begin
2344	>	TPB := TPB + Char(TPBVal);
2345	>	{ Now set the string parameter }
2346	>	ParamLength := Length(ParamValue);
2347	>	Inc(TPBLength, ParamLength + 1);
2348	>	TPB := TPB + Char(ParamLength) + ParamValue;
2349	>	end;
2350	>	else
2351	>	begin
2352	>	if (TPBVal > 0) and
2353	>	(TPBVal <= isc_tpb_last_tpb_constant) then
2354	>	IBError(ibxeTPBConstantNotSupported, [TPBConstantNames[TPBVal]])
2355	>	else
2356	>	IBError(ibxeTPBConstantUnknownEx, [sl.Names[i]]);
2357	>	end;
2358	>	end;
2359	>	end;
2360	>	end;
2361	>
2362	>	end.
2363	>
2364	>
2365	>
2366	>
2367	>

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