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Comparing ibx/trunk/runtime/IBDatabase.pas (file contents):
Revision 21 by tony, Thu Feb 26 10:33:34 2015 UTC vs.
Revision 37 by tony, Mon Feb 15 14:44:25 2016 UTC

#	Line 1 | Line 1
1	<	{************************************************************************}
2	<	{                                                                        }
3	<	{       Borland Delphi Visual Component Library                          }
4	<	{       InterBase Express core components                                }
5	<	{                                                                        }
6	<	{       Copyright (c) 1998-2000 Inprise Corporation                      }
7	<	{                                                                        }
8	<	{    InterBase Express is based in part on the product                   }
9	<	{    Free IB Components, written by Gregory H. Deatz for                 }
10	<	{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
11	<	{    Free IB Components is used under license.                           }
12	<	{                                                                        }
13	<	{    The contents of this file are subject to the InterBase              }
14	<	{    Public License Version 1.0 (the "License"); you may not             }
15	<	{    use this file except in compliance with the License. You            }
16	<	{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	<	{    Software distributed under the License is distributed on            }
18	<	{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
19	<	{    express or implied. See the License for the specific language       }
20	<	{    governing rights and limitations under the License.                 }
21	<	{    The Original Code was created by InterBase Software Corporation     }
22	<	{       and its successors.                                              }
23	<	{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
24	<	{       Corporation. All Rights Reserved.                                }
25	<	{    Contributor(s): Jeff Overcash                                       }
26	<	{                                                                        }
27	<	{    IBX For Lazarus (Firebird Express)                                  }
28	<	{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	<	{    Portions created by MWA Software are copyright McCallum Whyman      }
30	<	{    Associates Ltd 2011                                                 }
31	<	{                                                                        }
32	<	{************************************************************************}
33	<
34	<	unit IBDatabase;
35	<
36	<	{$Mode Delphi}
37	<
38	<	interface
39	<
40	<	uses
41	<	{$IFDEF WINDOWS }
42	<	Windows,
43	<	{$ELSE}
44	<	unix,
45	<	{$ENDIF}
46	<	Dialogs, Controls, StdCtrls, SysUtils, Classes, Forms, ExtCtrls, IBHeader, IBExternals, DB,
47	<	IB, DBLoginDlg;
48	<
49	<	const
50	<	DPBPrefix = 'isc_dpb_';
51	<	DPBConstantNames: array[1..isc_dpb_last_dpb_constant] of string = (
52	<	'cdd_pathname',
53	<	'allocation',
54	<	'journal',
55	<	'page_size',
56	<	'num_buffers',
57	<	'buffer_length',
58	<	'debug',
59	<	'garbage_collect',
60	<	'verify',
61	<	'sweep',
62	<	'enable_journal',
63	<	'disable_journal',
64	<	'dbkey_scope',
65	<	'number_of_users',
66	<	'trace',
67	<	'no_garbage_collect',
68	<	'damaged',
69	<	'license',
70	<	'sys_user_name',
71	<	'encrypt_key',
72	<	'activate_shadow',
73	<	'sweep_interval',
74	<	'delete_shadow',
75	<	'force_write',
76	<	'begin_log',
77	<	'quit_log',
78	<	'no_reserve',
79	<	'user_name',
80	<	'password',
81	<	'password_enc',
82	<	'sys_user_name_enc',
83	<	'interp',
84	<	'online_dump',
85	<	'old_file_size',
86	<	'old_num_files',
87	<	'old_file',
88	<	'old_start_page',
89	<	'old_start_seqno',
90	<	'old_start_file',
91	<	'drop_walfile',
92	<	'old_dump_id',
93	<	'wal_backup_dir',
94	<	'wal_chkptlen',
95	<	'wal_numbufs',
96	<	'wal_bufsize',
97	<	'wal_grp_cmt_wait',
98	<	'lc_messages',
99	<	'lc_ctype',
100	<	'cache_manager',
101	<	'shutdown',
102	<	'online',
103	<	'shutdown_delay',
104	<	'reserved',
105	<	'overwrite',
106	<	'sec_attach',
107	<	'disable_wal',
108	<	'connect_timeout',
109	<	'dummy_packet_interval',
110	<	'gbak_attach',
111	<	'sql_role_name',
112	<	'set_page_buffers',
113	<	'working_directory',
114	<	'sql_dialect',
115	<	'set_db_readonly',
116	<	'set_db_sql_dialect',
117	<	'gfix_attach',
118	<	'gstat_attach'
119	<	);
120	<
121	<	TPBPrefix = 'isc_tpb_';
122	<	TPBConstantNames: array[1..isc_tpb_last_tpb_constant] of string = (
123	<	'consistency',
124	<	'concurrency',
125	<	'shared',
126	<	'protected',
127	<	'exclusive',
128	<	'wait',
129	<	'nowait',
130	<	'read',
131	<	'write',
132	<	'lock_read',
133	<	'lock_write',
134	<	'verb_time',
135	<	'commit_time',
136	<	'ignore_limbo',
137	<	'read_committed',
138	<	'autocommit',
139	<	'rec_version',
140	<	'no_rec_version',
141	<	'restart_requests',
142	<	'no_auto_undo'
143	<	);
144	<
145	<	type
146	<
147	<	TIBDatabase = class;
148	<	TIBTransaction = class;
149	<	TIBBase = class;
150	<
151	<	TIBDatabaseLoginEvent = procedure(Database: TIBDatabase;
152	<	LoginParams: TStrings) of object;
153	<
154	<	TIBFileName = type string;
155	<	{ TIBDatabase }
156	<	TIBDataBase = class(TCustomConnection)
157	<	private
158	<	FAllowStreamedConnected: boolean;
159	<	FHiddenPassword: string;
160	<	FIBLoaded: Boolean;
161	<	FOnLogin: TIBDatabaseLoginEvent;
162	<	FTraceFlags: TTraceFlags;
163	<	FDBSQLDialect: Integer;
164	<	FSQLDialect: Integer;
165	<	FOnDialectDowngradeWarning: TNotifyEvent;
166	<	FCanTimeout: Boolean;
167	<	FSQLObjects: TList;
168	<	FTransactions: TList;
169	<	FDBName: TIBFileName;
170	<	FDBParams: TStrings;
171	<	FDBParamsChanged: Boolean;
172	<	FDPB: PChar;
173	<	FDPBLength: Short;
174	<	FHandle: TISC_DB_HANDLE;
175	<	FHandleIsShared: Boolean;
176	<	FOnIdleTimer: TNotifyEvent;
177	<	FDefaultTransaction: TIBTransaction;
178	<	FInternalTransaction: TIBTransaction;
179	<	FStreamedConnected: Boolean;
180	<	FTimer: TTimer;
181	<	FUserNames: TStringList;
182	<	FDataSets: TList;
183	<	FLoginCalled: boolean;
184	<	procedure EnsureInactive;
185	<	function GetDBSQLDialect: Integer;
186	<	function GetSQLDialect: Integer;
187	<	procedure SetSQLDialect(const Value: Integer);
188	<	procedure ValidateClientSQLDialect;
189	<	procedure DBParamsChange(Sender: TObject);
190	<	procedure DBParamsChanging(Sender: TObject);
191	<	function GetSQLObject(Index: Integer): TIBBase;
192	<	function GetSQLObjectCount: Integer;
193	<	function GetDBParamByDPB(const Idx: Integer): String;
194	<	function GetIdleTimer: Integer;
195	<	function GetTransaction(Index: Integer): TIBTransaction;
196	<	function GetTransactionCount: Integer;
197	<	function Login: Boolean;
198	<	procedure SetDatabaseName(const Value: TIBFileName);
199	<	procedure SetDBParamByDPB(const Idx: Integer; Value: String);
200	<	procedure SetDBParams(Value: TStrings);
201	<	procedure SetDefaultTransaction(Value: TIBTransaction);
202	<	procedure SetIdleTimer(Value: Integer);
203	<	procedure TimeoutConnection(Sender: TObject);
204	<	function GetIsReadOnly: Boolean;
205	<	function AddSQLObject(ds: TIBBase): Integer;
206	<	procedure RemoveSQLObject(Idx: Integer);
207	<	procedure RemoveSQLObjects;
208	<	procedure InternalClose(Force: Boolean);
209	<
210	<	protected
211	<	procedure DoConnect; override;
212	<	procedure DoDisconnect; override;
213	<	function GetConnected: Boolean; override;
214	<	procedure CheckStreamConnect;
215	<	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
216	<	function GetDataset(Index : longint) : TDataset; override;
217	<	function GetDataSetCount : Longint; override;
218	<	procedure ReadState(Reader: TReader); override;
219	<	procedure SetConnected (Value : boolean); override;
220	<	public
221	<	constructor Create(AOwner: TComponent); override;
222	<	destructor Destroy; override;
223	<	procedure ApplyUpdates(const DataSets: array of TDataSet);
224	<	procedure CloseDataSets;
225	<	procedure CheckActive;
226	<	procedure CheckInactive;
227	<	procedure CreateDatabase;
228	<	procedure DropDatabase;
229	<	procedure ForceClose;
230	<	procedure GetFieldNames(const TableName: string; List: TStrings);
231	<	procedure GetTableNames(List: TStrings; SystemTables: Boolean = False);
232	<	function IndexOfDBConst(st: String): Integer;
233	<	function TestConnected: Boolean;
234	<	procedure CheckDatabaseName;
235	<	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
236	<	function AddTransaction(TR: TIBTransaction): Integer;
237	<	function FindTransaction(TR: TIBTransaction): Integer;
238	<	function FindDefaultTransaction(): TIBTransaction;
239	<	procedure RemoveTransaction(Idx: Integer);
240	<	procedure RemoveTransactions;
241	<	procedure SetHandle(Value: TISC_DB_HANDLE);
242	<
243	<	property Handle: TISC_DB_HANDLE read FHandle;
244	<	property IsReadOnly: Boolean read GetIsReadOnly;
245	<	property DBParamByDPB[const Idx: Integer]: String read GetDBParamByDPB
246	<	write SetDBParamByDPB;
247	<	property SQLObjectCount: Integer read GetSQLObjectCount;
248	<	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
249	<	property HandleIsShared: Boolean read FHandleIsShared;
250	<	property TransactionCount: Integer read GetTransactionCount;
251	<	property Transactions[Index: Integer]: TIBTransaction read GetTransaction;
252	<	property InternalTransaction: TIBTransaction read FInternalTransaction;
253	<
254	<	published
255	<	property Connected;
256	<	property AllowStreamedConnected: boolean read FAllowStreamedConnected
257	<	write FAllowStreamedConnected;
258	<	property DatabaseName: TIBFileName read FDBName write SetDatabaseName;
259	<	property Params: TStrings read FDBParams write SetDBParams;
260	<	property LoginPrompt default True;
261	<	property DefaultTransaction: TIBTransaction read FDefaultTransaction
262	<	write SetDefaultTransaction;
263	<	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer;
264	<	property SQLDialect : Integer read GetSQLDialect write SetSQLDialect default 3;
265	<	property DBSQLDialect : Integer read FDBSQLDialect;
266	<	property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
267	<	property AfterConnect;
268	<	property AfterDisconnect;
269	<	property BeforeConnect;
270	<	property BeforeDisconnect;
271	<	property OnLogin: TIBDatabaseLoginEvent read FOnLogin write FOnLogin;
272	<	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
273	<	property OnDialectDowngradeWarning: TNotifyEvent read FOnDialectDowngradeWarning write FOnDialectDowngradeWarning;
274	<	end;
275	<
276	<	{ TIBTransaction }
277	<
278	<	TTransactionAction         = (TARollback, TACommit, TARollbackRetaining, TACommitRetaining);
279	<
280	<	TIBTransaction = class(TComponent)
281	<	private
282	<	FAfterTransactionEnd: TNotifyEvent;
283	<	FBeforeTransactionEnd: TNotifyEvent;
284	<	FIBLoaded: Boolean;
285	<	FCanTimeout         : Boolean;
286	<	FDatabases          : TList;
287	<	FSQLObjects         : TList;
288	<	FDefaultDatabase    : TIBDatabase;
289	<	FHandle             : TISC_TR_HANDLE;
290	<	FHandleIsShared     : Boolean;
291	<	FOnIdleTimer          : TNotifyEvent;
292	<	FStreamedActive     : Boolean;
293	<	FTPB                : PChar;
294	<	FTPBLength          : Short;
295	<	FTimer              : TTimer;
296	<	FDefaultAction      : TTransactionAction;
297	<	FTRParams           : TStrings;
298	<	FTRParamsChanged    : Boolean;
299	<	FInEndTransaction   : boolean;
300	<	FEndAction          : TTransactionAction;
301	<	procedure DoBeforeTransactionEnd;
302	<	procedure DoAfterTransactionEnd;
303	<	procedure EnsureNotInTransaction;
304	<	procedure EndTransaction(Action: TTransactionAction; Force: Boolean);
305	<	function GetDatabase(Index: Integer): TIBDatabase;
306	<	function GetDatabaseCount: Integer;
307	<	function GetSQLObject(Index: Integer): TIBBase;
308	<	function GetSQLObjectCount: Integer;
309	<	function GetInTransaction: Boolean;
310	<	function GetIdleTimer: Integer;
311	<	procedure BeforeDatabaseDisconnect(DB: TIBDatabase);
312	<	procedure SetActive(Value: Boolean);
313	<	procedure SetDefaultAction(Value: TTransactionAction);
314	<	procedure SetDefaultDatabase(Value: TIBDatabase);
315	<	procedure SetIdleTimer(Value: Integer);
316	<	procedure SetTRParams(Value: TStrings);
317	<	procedure TimeoutTransaction(Sender: TObject);
318	<	procedure TRParamsChange(Sender: TObject);
319	<	procedure TRParamsChanging(Sender: TObject);
320	<	function AddSQLObject(ds: TIBBase): Integer;
321	<	procedure RemoveSQLObject(Idx: Integer);
322	<	procedure RemoveSQLObjects;
323	<
324	<	protected
325	<	procedure Loaded; override;
326	<	procedure SetHandle(Value: TISC_TR_HANDLE);
327	<	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
328	<
329	<	public
330	<	constructor Create(AOwner: TComponent); override;
331	<	destructor Destroy; override;
332	<	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
333	<	procedure Commit;
334	<	procedure CommitRetaining;
335	<	procedure Rollback;
336	<	procedure RollbackRetaining;
337	<	procedure StartTransaction;
338	<	procedure CheckInTransaction;
339	<	procedure CheckNotInTransaction;
340	<
341	<	function AddDatabase(db: TIBDatabase): Integer;
342	<	function FindDatabase(db: TIBDatabase): Integer;
343	<	function FindDefaultDatabase: TIBDatabase;
344	<	function GetEndAction: TTransactionAction;
345	<	procedure RemoveDatabase(Idx: Integer);
346	<	procedure RemoveDatabases;
347	<	procedure CheckDatabasesInList;
348	<
349	<	property DatabaseCount: Integer read GetDatabaseCount;
350	<	property Databases[Index: Integer]: TIBDatabase read GetDatabase;
351	<	property SQLObjectCount: Integer read GetSQLObjectCount;
352	<	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
353	<	property Handle: TISC_TR_HANDLE read FHandle;
354	<	property HandleIsShared: Boolean read FHandleIsShared;
355	<	property InTransaction: Boolean read GetInTransaction;
356	<	property TPB: PChar read FTPB;
357	<	property TPBLength: Short read FTPBLength;
358	<	published
359	<	property Active: Boolean read GetInTransaction write SetActive;
360	<	property DefaultDatabase: TIBDatabase read FDefaultDatabase
361	<	write SetDefaultDatabase;
362	<	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer default 0;
363	<	property DefaultAction: TTransactionAction read FDefaultAction write SetDefaultAction default taCommit;
364	<	property Params: TStrings read FTRParams write SetTRParams;
365	<	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
366	<	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
367	<	write FBeforeTransactionEnd;
368	<	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
369	<	write FAfterTransactionEnd;
370	<	end;
371	<
372	<	{ TIBBase }
373	<
374	<	{ Virtually all components in IB are "descendents" of TIBBase.
375	<	It is to more easily manage the database and transaction
376	<	connections. }
377	<	TIBBase = class(TObject)
378	<	protected
379	<	FDatabase: TIBDatabase;
380	<	FIndexInDatabase: Integer;
381	<	FTransaction: TIBTransaction;
382	<	FIndexInTransaction: Integer;
383	<	FOwner: TObject;
384	<	FBeforeDatabaseDisconnect: TNotifyEvent;
385	<	FAfterDatabaseDisconnect: TNotifyEvent;
386	<	FAfterDatabaseConnect: TNotifyEvent;
387	<	FOnDatabaseFree: TNotifyEvent;
388	<	FBeforeTransactionEnd: TNotifyEvent;
389	<	FAfterTransactionEnd: TNotifyEvent;
390	<	FOnTransactionFree: TNotifyEvent;
391	<
392	<	procedure DoAfterDatabaseConnect; virtual;
393	<	procedure DoBeforeDatabaseDisconnect; virtual;
394	<	procedure DoAfterDatabaseDisconnect; virtual;
395	<	procedure DoDatabaseFree; virtual;
396	<	procedure DoBeforeTransactionEnd; virtual;
397	<	procedure DoAfterTransactionEnd; virtual;
398	<	procedure DoTransactionFree; virtual;
399	<	function GetDBHandle: PISC_DB_HANDLE; virtual;
400	<	function GetTRHandle: PISC_TR_HANDLE; virtual;
401	<	procedure SetDatabase(Value: TIBDatabase); virtual;
402	<	procedure SetTransaction(Value: TIBTransaction); virtual;
403	<	public
404	<	constructor Create(AOwner: TObject);
405	<	destructor Destroy; override;
406	<	procedure CheckDatabase; virtual;
407	<	procedure CheckTransaction; virtual;
408	<	public
409	<	property AfterDatabaseConnect: TNotifyEvent read FAfterDatabaseConnect
410	<	write FAfterDatabaseConnect;
411	<	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
412	<	write FBeforeDatabaseDisconnect;
413	<	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
414	<	write FAfterDatabaseDisconnect;
415	<	property OnDatabaseFree: TNotifyEvent read FOnDatabaseFree write FOnDatabaseFree;
416	<	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd write FBeforeTransactionEnd;
417	<	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd write FAfterTransactionEnd;
418	<	property OnTransactionFree: TNotifyEvent read FOnTransactionFree write FOnTransactionFree;
419	<	property Database: TIBDatabase read FDatabase
420	<	write SetDatabase;
421	<	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
422	<	property Owner: TObject read FOwner;
423	<	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
424	<	property Transaction: TIBTransaction read FTransaction
425	<	write SetTransaction;
426	<	end;
427	<
428	<	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
429	<	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
430	<
431	<
432	<	implementation
433	<
434	<	uses IBIntf, IBSQLMonitor, IBCustomDataSet, IBDatabaseInfo, IBSQL, IBUtils,
435	<	typInfo;
436	<
437	<	{ TIBDatabase }
438	<
439	<	constructor TIBDataBase.Create(AOwner: TComponent);
440	<	{$ifdef WINDOWS}
441	<	var acp: uint;
442	<	{$endif}
443	<	begin
444	<	inherited Create(AOwner);
445	<	FIBLoaded := False;
446	<	CheckIBLoaded;
447	<	FIBLoaded := True;
448	<	LoginPrompt := True;
449	<	FSQLObjects := TList.Create;
450	<	FTransactions := TList.Create;
451	<	FDBName := '';
452	<	FDBParams := TStringList.Create;
453	<	{$ifdef UNIX}
454	<	if csDesigning in ComponentState then
455	<	FDBParams.Add('lc_ctype=UTF-8');
456	<	{$else}
457	<	{$ifdef WINDOWS}
458	<	if csDesigning in ComponentState then
459	<	begin
460	<	acp := GetACP;
461	<	if (acp >= 1250) and (acp <= 1254) then
462	<	FDBParams.Values['lc_ctype'] := Format('WIN%d',[acp]);
463	<	end;
464	<	{$endif}
465	<	{$endif}
466	<	FDBParamsChanged := True;
467	<	TStringList(FDBParams).OnChange := DBParamsChange;
468	<	TStringList(FDBParams).OnChanging := DBParamsChanging;
469	<	FDPB := nil;
470	<	FHandle := nil;
471	<	FUserNames := nil;
472	<	FInternalTransaction := TIBTransaction.Create(self);
473	<	FInternalTransaction.DefaultDatabase := Self;
474	<	FTimer := TTimer.Create(Self);
475	<	FTimer.Enabled := False;
476	<	FTimer.Interval := 0;
477	<	FTimer.OnTimer := TimeoutConnection;
478	<	FDBSQLDialect := 1;
479	<	FSQLDialect := 3;
480	<	FTraceFlags := [];
481	<	FDataSets := TList.Create;
482	<	CheckStreamConnect;
483	<	end;
484	<
485	<	destructor TIBDataBase.Destroy;
486	<	var
487	<	i: Integer;
488	<	begin
489	<	if FIBLoaded then
490	<	begin
491	<	IdleTimer := 0;
492	<	if FHandle <> nil then
493	<	ForceClose;
494	<	for i := 0 to FSQLObjects.Count - 1 do
495	<	if FSQLObjects[i] <> nil then
496	<	SQLObjects[i].DoDatabaseFree;
497	<	RemoveSQLObjects;
498	<	RemoveTransactions;
499	<	FInternalTransaction.Free;
500	<	FreeMem(FDPB);
501	<	FDPB := nil;
502	<	FDBParams.Free;
503	<	FSQLObjects.Free;
504	<	FUserNames.Free;
505	<	FTransactions.Free;
506	<	end;
507	<	FDataSets.Free;
508	<	inherited Destroy;
509	<	end;
510	<
511	<	function TIBDataBase.Call(ErrCode: ISC_STATUS; RaiseError: Boolean
512	<	): ISC_STATUS;
513	<	begin
514	<	result := ErrCode;
515	<	FCanTimeout := False;
516	<	if RaiseError and (ErrCode > 0) then
517	<	IBDataBaseError;
518	<	end;
519	<
520	<	procedure TIBDataBase.CheckActive;
521	<	begin
522	<	if StreamedConnected and (not Connected) then
523	<	Loaded;
524	<	if FHandle = nil then
525	<	IBError(ibxeDatabaseClosed, [nil]);
526	<	end;
527	<
528	<	procedure TIBDataBase.EnsureInactive;
529	<	begin
530	<	if csDesigning in ComponentState then
531	<	begin
532	<	if FHandle <> nil then
533	<	Close;
534	<	end
535	<	end;
536	<
537	<	procedure TIBDataBase.CheckInactive;
538	<	begin
539	<	if FHandle <> nil then
540	<	IBError(ibxeDatabaseOpen, [nil]);
541	<	end;
542	<
543	<	procedure TIBDataBase.CheckDatabaseName;
544	<	begin
545	<	if (FDBName = '') then
546	<	IBError(ibxeDatabaseNameMissing, [nil]);
547	<	end;
548	<
549	<	function TIBDataBase.AddSQLObject(ds: TIBBase): Integer;
550	<	begin
551	<	result := 0;
552	<	if (ds.Owner is TIBCustomDataSet) then
553	<	FDataSets.Add(ds.Owner);
554	<	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
555	<	Inc(result);
556	<	if (result = FSQLObjects.Count) then
557	<	FSQLObjects.Add(ds)
558	<	else
559	<	FSQLObjects[result] := ds;
560	<	end;
561	<
562	<	function TIBDataBase.AddTransaction(TR: TIBTransaction): Integer;
563	<	begin
564	<	result := FindTransaction(TR);
565	<	if result <> -1 then
566	<	begin
567	<	result := -1;
568	<	exit;
569	<	end;
570	<	result := 0;
571	<	while (result < FTransactions.Count) and (FTransactions[result] <> nil) do
572	<	Inc(result);
573	<	if (result = FTransactions.Count) then
574	<	FTransactions.Add(TR)
575	<	else
576	<	FTransactions[result] := TR;
577	<	end;
578	<
579	<	procedure TIBDataBase.DoDisconnect;
580	<	begin
581	<	if Connected then
582	<	InternalClose(False);
583	<	FDBSQLDialect := 1;
584	<	end;
585	<
586	<	procedure TIBDataBase.CreateDatabase;
587	<	var
588	<	tr_handle: TISC_TR_HANDLE;
589	<	begin
590	<	CheckInactive;
591	<	tr_handle := nil;
592	<	Call(
593	<	isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0,
594	<	PChar('CREATE DATABASE ''' + FDBName + ''' ' + {do not localize}
595	<	Params.Text), SQLDialect, nil),
596	<	True);
597	<	end;
598	<
599	<	procedure TIBDataBase.DropDatabase;
600	<	begin
601	<	CheckActive;
602	<	Call(isc_drop_database(StatusVector, @FHandle), True);
603	<	end;
604	<
605	<	procedure TIBDataBase.DBParamsChange(Sender: TObject);
606	<	begin
607	<	FDBParamsChanged := True;
608	<	end;
609	<
610	<	procedure TIBDataBase.DBParamsChanging(Sender: TObject);
611	<	begin
612	<	EnsureInactive;
613	<	CheckInactive;
614	<	end;
615	<
616	<	function TIBDataBase.FindTransaction(TR: TIBTransaction): Integer;
617	<	var
618	<	i: Integer;
619	<	begin
620	<	result := -1;
621	<	for i := 0 to FTransactions.Count - 1 do
622	<	if TR = Transactions[i] then
623	<	begin
624	<	result := i;
625	<	break;
626	<	end;
627	<	end;
628	<
629	<	function TIBDataBase.FindDefaultTransaction: TIBTransaction;
630	<	var
631	<	i: Integer;
632	<	begin
633	<	result := FDefaultTransaction;
634	<	if result = nil then
635	<	begin
636	<	for i := 0 to FTransactions.Count - 1 do
637	<	if (Transactions[i] <> nil) and
638	<	(TIBTransaction(Transactions[i]).DefaultDatabase = self) and
639	<	(TIBTransaction(Transactions[i]) <> FInternalTransaction) then
640	<	begin
641	<	result := TIBTransaction(Transactions[i]);
642	<	break;
643	<	end;
644	<	end;
645	<	end;
646	<
647	<	procedure TIBDataBase.ForceClose;
648	<	begin
649	<	if Connected then
650	<	InternalClose(True);
651	<	end;
652	<
653	<	function TIBDataBase.GetConnected: Boolean;
654	<	begin
655	<	result := FHandle <> nil;
656	<	end;
657	<
658	<	function TIBDataBase.GetSQLObject(Index: Integer): TIBBase;
659	<	begin
660	<	result := FSQLObjects[Index];
661	<	end;
662	<
663	<	function TIBDataBase.GetSQLObjectCount: Integer;
664	<	var
665	<	i: Integer;
666	<	begin
667	<	result := 0;
668	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
669	<	Inc(result);
670	<	end;
671	<
672	<	function TIBDataBase.GetDBParamByDPB( const Idx: Integer): String;
673	<	var
674	<	ConstIdx, EqualsIdx: Integer;
675	<	begin
676	<	if (Idx > 0) and (Idx <= isc_dpb_last_dpb_constant) then
677	<	begin
678	<	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
679	<	if ConstIdx = -1 then
680	<	result := ''
681	<	else
682	<	begin
683	<	result := Params[ConstIdx];
684	<	EqualsIdx := Pos('=', result); {mbcs ok}
685	<	if EqualsIdx = 0 then
686	<	result := ''
687	<	else
688	<	result := Copy(result, EqualsIdx + 1, Length(result));
689	<	end;
690	<	end
691	<	else
692	<	result := '';
693	<	end;
694	<
695	<	function TIBDataBase.GetIdleTimer: Integer;
696	<	begin
697	<	result := FTimer.Interval;
698	<	end;
699	<
700	<	function TIBDataBase.GetTransaction(Index: Integer): TIBTransaction;
701	<	begin
702	<	result := FTransactions[Index];
703	<	end;
704	<
705	<	function TIBDataBase.GetTransactionCount: Integer;
706	<	var
707	<	i: Integer;
708	<	begin
709	<	result := 0;
710	<	for i := 0 to FTransactions.Count - 1 do
711	<	if FTransactions[i] <> nil then
712	<	Inc(result);
713	<	end;
714	<
715	<	function TIBDataBase.IndexOfDBConst(st: String): Integer;
716	<	var
717	<	i, pos_of_str: Integer;
718	<	begin
719	<	result := -1;
720	<	for i := 0 to Params.Count - 1 do
721	<	begin
722	<	pos_of_str := Pos(st, AnsiLowerCase(Params[i])); {mbcs ok}
723	<	if (pos_of_str = 1) or (pos_of_str = Length(DPBPrefix) + 1) then
724	<	begin
725	<	result := i;
726	<	break;
727	<	end;
728	<	end;
729	<	end;
730	<
731	<	procedure TIBDataBase.InternalClose(Force: Boolean);
732	<	var
733	<	i: Integer;
734	<	begin
735	<	CheckActive;
736	<	{ Tell all connected transactions that we're disconnecting.
737	<	This is so transactions can commit/rollback, accordingly
738	<	}
739	<	for i := 0 to FTransactions.Count - 1 do
740	<	begin
741	<	try
742	<	if FTransactions[i] <> nil then
743	<	Transactions[i].BeforeDatabaseDisconnect(Self);
744	<	except
745	<	if not Force then
746	<	raise;
747	<	end;
748	<	end;
749	<	for i := 0 to FSQLObjects.Count - 1 do
750	<	begin
751	<	try
752	<	if FSQLObjects[i] <> nil then
753	<	SQLObjects[i].DoBeforeDatabaseDisconnect;
754	<	except
755	<	if not Force then
756	<	raise;
757	<	end;
758	<	end;
759	<
760	<	if (not HandleIsShared) and
761	<	(Call(isc_detach_database(StatusVector, @FHandle), False) > 0) and
762	<	(not Force) then
763	<	IBDataBaseError
764	<	else
765	<	begin
766	<	FHandle := nil;
767	<	FHandleIsShared := False;
768	<	end;
769	<
770	<	if not (csDesigning in ComponentState) then
771	<	MonitorHook.DBDisconnect(Self);
772	<
773	<	for i := 0 to FSQLObjects.Count - 1 do
774	<	if FSQLObjects[i] <> nil then
775	<	SQLObjects[i].DoAfterDatabaseDisconnect;
776	<	end;
777	<
778	<	procedure TIBDataBase.CheckStreamConnect;
779	<	var
780	<	i: integer;
781	<	begin
782	<	try
783	<	if not (csDesigning in ComponentState) and StreamedConnected and (not Connected) then
784	<	begin
785	<	for i := 0 to FTransactions.Count - 1 do
786	<	if  FTransactions[i] <> nil then
787	<	begin
788	<	with TIBTransaction(FTransactions[i]) do
789	<	if not Active then
790	<	if FStreamedActive and not InTransaction then
791	<	begin
792	<	StartTransaction;
793	<	FStreamedActive := False;
794	<	end;
795	<	end;
796	<	if (FDefaultTransaction <> nil) and
797	<	(FDefaultTransaction.FStreamedActive) and
798	<	(not FDefaultTransaction.InTransaction) then
799	<	FDefaultTransaction.StartTransaction;
800	<	FStreamedConnected := False;
801	<	end;
802	<	except
803	<	if csDesigning in ComponentState then
804	<	Application.HandleException(Self)
805	<	else
806	<	raise;
807	<	end;
808	<	end;
809	<
810	<	procedure TIBDataBase.Notification(AComponent: TComponent;
811	<	Operation: TOperation);
812	<	var
813	<	i: Integer;
814	<	begin
815	<	inherited Notification( AComponent, Operation);
816	<	if (Operation = opRemove) and (AComponent = FDefaultTransaction) then
817	<	begin
818	<	i := FindTransaction(FDefaultTransaction);
819	<	if (i <> -1) then
820	<	RemoveTransaction(i);
821	<	FDefaultTransaction := nil;
822	<	end;
823	<	end;
824	<
825	<	function TIBDataBase.Login: Boolean;
826	<	var
827	<	IndexOfUser, IndexOfPassword: Integer;
828	<	Username, Password, OldPassword: String;
829	<	LoginParams: TStrings;
830	<
831	<	procedure HidePassword;
832	<	var
833	<	I: Integer;
834	<	IndexAt: Integer;
835	<	begin
836	<	IndexAt := 0;
837	<	for I := 0 to Params.Count -1 do
838	<	if Pos('password', LowerCase(Trim(Params.Names[i]))) = 1 then {mbcs ok}
839	<	begin
840	<	FHiddenPassword := Params.Values[Params.Names[i]];
841	<	IndexAt := I;
842	<	break;
843	<	end;
844	<	if IndexAt <> 0 then
845	<	Params.Delete(IndexAt);
846	<	end;
847	<
848	<	begin
849	<	Result := false;
850	<	if FLoginCalled then Exit;
851	<	FLoginCalled := true;
852	<	try
853	<	if Assigned(FOnLogin) and not (csDesigning in ComponentState) then
854	<	begin
855	<	result := True;
856	<	LoginParams := TStringList.Create;
857	<	try
858	<	LoginParams.Assign(Params);
859	<	FOnLogin(Self, LoginParams);
860	<	Params.Assign (LoginParams);
861	<	HidePassword;
862	<	finally
863	<	LoginParams.Free;
864	<	end;
865	<	end
866	<	else
867	<	begin
868	<	IndexOfUser := IndexOfDBConst(DPBConstantNames[isc_dpb_user_name]);
869	<	if IndexOfUser <> -1 then
870	<	Username := Copy(Params[IndexOfUser],
871	<	Pos('=', Params[IndexOfUser]) + 1, {mbcs ok}
872	<	Length(Params[IndexOfUser]));
873	<	IndexOfPassword := IndexOfDBConst(DPBConstantNames[isc_dpb_password]);
874	<	if IndexOfPassword <> -1 then
875	<	begin
876	<	Password := Copy(Params[IndexOfPassword],
877	<	Pos('=', Params[IndexOfPassword]) + 1, {mbcs ok}
878	<	Length(Params[IndexOfPassword]));
879	<	OldPassword := password;
880	<	end;
881	<	result := LoginDialogEx(DatabaseName, Username, Password, False);
882	<	if result then
883	<	begin
884	<	if IndexOfUser = -1 then
885	<	Params.Add(DPBConstantNames[isc_dpb_user_name] + '=' + Username)
886	<	else
887	<	Params[IndexOfUser] := DPBConstantNames[isc_dpb_user_name] +
888	<	'=' + Username;
889	<	if (Password = OldPassword) then
890	<	FHiddenPassword := ''
891	<	else
892	<	begin
893	<	FHiddenPassword := Password;
894	<	if OldPassword <> '' then
895	<	HidePassword;
896	<	end;
897	<	end;
898	<	end;
899	<	finally
900	<	FLoginCalled := false
901	<	end;
902	<	end;
903	<
904	<	procedure TIBDataBase.DoConnect;
905	<	var
906	<	DPB: String;
907	<	TempDBParams: TStrings;
908	<	I: integer;
909	<
910	<	begin
911	<	CheckInactive;
912	<	CheckDatabaseName;
913	<	if (not LoginPrompt) and (FHiddenPassword <> '') then
914	<	begin
915	<	FHiddenPassword := '';
916	<	FDBParamsChanged := True;
917	<	end;
918	<	{ Use builtin login prompt if requested }
919	<	if (LoginPrompt or (csDesigning in ComponentState)) and not Login then
920	<	IBError(ibxeOperationCancelled, [nil]);
921	<	{ Generate a new DPB if necessary }
922	<	if (FDBParamsChanged) then
923	<	begin
924	<	FDBParamsChanged := False;
925	<	if (not LoginPrompt and not (csDesigning in ComponentState)) or (FHiddenPassword = '') then
926	<	GenerateDPB(FDBParams, DPB, FDPBLength)
927	<	else
928	<	begin
929	<	TempDBParams := TStringList.Create;
930	<	try
931	<	TempDBParams.Assign(FDBParams);
932	<	TempDBParams.Add('password=' + FHiddenPassword);
933	<	GenerateDPB(TempDBParams, DPB, FDPBLength);
934	<	finally
935	<	TempDBParams.Free;
936	<	end;
937	<	end;
938	<	IBAlloc(FDPB, 0, FDPBLength);
939	<	Move(DPB[1], FDPB[0], FDPBLength);
940	<	end;
941	<	if Call(isc_attach_database(StatusVector, Length(FDBName),
942	<	PChar(FDBName), @FHandle,
943	<	FDPBLength, FDPB), False) > 0 then
944	<	begin
945	<	FHandle := nil;
946	<	IBDataBaseError;
947	<	end;
948	<	FDBSQLDialect := GetDBSQLDialect;
949	<	ValidateClientSQLDialect;
950	<	for i := 0 to FSQLObjects.Count - 1 do
951	<	begin
952	<	if FSQLObjects[i] <> nil then
953	<	SQLObjects[i].DoAfterDatabaseConnect;
954	<	end;
955	<	if not (csDesigning in ComponentState) then
956	<	MonitorHook.DBConnect(Self);
957	<	end;
958	<
959	<	procedure TIBDataBase.RemoveSQLObject(Idx: Integer);
960	<	var
961	<	ds: TIBBase;
962	<	begin
963	<	if (Idx >= 0) and (FSQLObjects[Idx] <> nil) then
964	<	begin
965	<	ds := SQLObjects[Idx];
966	<	FSQLObjects[Idx] := nil;
967	<	ds.Database := nil;
968	<	if (ds.owner is TDataSet) then
969	<	FDataSets.Remove(TDataSet(ds.Owner));
970	<	end;
971	<	end;
972	<
973	<	procedure TIBDataBase.RemoveSQLObjects;
974	<	var
975	<	i: Integer;
976	<	begin
977	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
978	<	begin
979	<	RemoveSQLObject(i);
980	<	if (TIBBase(FSQLObjects[i]).owner is TDataSet) then
981	<	FDataSets.Remove(TDataSet(TIBBase(FSQLObjects[i]).owner));
982	<	end;
983	<	end;
984	<
985	<	procedure TIBDataBase.RemoveTransaction(Idx: Integer);
986	<	var
987	<	TR: TIBTransaction;
988	<	begin
989	<	if ((Idx >= 0) and (FTransactions[Idx] <> nil)) then
990	<	begin
991	<	TR := Transactions[Idx];
992	<	FTransactions[Idx] := nil;
993	<	TR.RemoveDatabase(TR.FindDatabase(Self));
994	<	if TR = FDefaultTransaction then
995	<	FDefaultTransaction := nil;
996	<	end;
997	<	end;
998	<
999	<	procedure TIBDataBase.RemoveTransactions;
1000	<	var
1001	<	i: Integer;
1002	<	begin
1003	<	for i := 0 to FTransactions.Count - 1 do if FTransactions[i] <> nil then
1004	<	RemoveTransaction(i);
1005	<	end;
1006	<
1007	<	procedure TIBDataBase.SetDatabaseName( const Value: TIBFileName);
1008	<	begin
1009	<	if FDBName <> Value then
1010	<	begin
1011	<	EnsureInactive;
1012	<	CheckInactive;
1013	<	FDBName := Value;
1014	<	end;
1015	<	end;
1016	<
1017	<	procedure TIBDataBase.SetDBParamByDPB( const Idx: Integer; Value: String);
1018	<	var
1019	<	ConstIdx: Integer;
1020	<	begin
1021	<	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
1022	<	if (Value = '') then
1023	<	begin
1024	<	if ConstIdx <> -1 then
1025	<	Params.Delete(ConstIdx);
1026	<	end
1027	<	else
1028	<	begin
1029	<	if (ConstIdx = -1) then
1030	<	Params.Add(DPBConstantNames[Idx] + '=' + Value)
1031	<	else
1032	<	Params[ConstIdx] := DPBConstantNames[Idx] + '=' + Value;
1033	<	end;
1034	<	end;
1035	<
1036	<	procedure TIBDataBase.SetDBParams(Value: TStrings);
1037	<	begin
1038	<	FDBParams.Assign(Value);
1039	<	end;
1040	<
1041	<	procedure TIBDataBase.SetDefaultTransaction(Value: TIBTransaction);
1042	<	var
1043	<	i: Integer;
1044	<	begin
1045	<	if (FDefaultTransaction <> nil) and (FDefaultTransaction <> Value) then
1046	<	begin
1047	<	i := FindTransaction(FDefaultTransaction);
1048	<	if (i <> -1) and (FDefaultTransaction.DefaultDatabase <> self) then
1049	<	RemoveTransaction(i);
1050	<	end;
1051	<	if (Value <> nil) and (FDefaultTransaction <> Value) then
1052	<	begin
1053	<	Value.AddDatabase(Self);
1054	<	AddTransaction(Value);
1055	<	end;
1056	<	FDefaultTransaction := Value;
1057	<	end;
1058	<
1059	<	procedure TIBDataBase.SetHandle(Value: TISC_DB_HANDLE);
1060	<	begin
1061	<	if HandleIsShared then
1062	<	Close
1063	<	else
1064	<	CheckInactive;
1065	<	FHandle := Value;
1066	<	FHandleIsShared := (Value <> nil);
1067	<	end;
1068	<
1069	<	procedure TIBDataBase.SetIdleTimer(Value: Integer);
1070	<	begin
1071	<	if Value < 0 then
1072	<	IBError(ibxeTimeoutNegative, [nil])
1073	<	else
1074	<	if (Value = 0) then
1075	<	begin
1076	<	FTimer.Enabled := False;
1077	<	FTimer.Interval := 0;
1078	<	end
1079	<	else
1080	<	if (Value > 0) then
1081	<	begin
1082	<	FTimer.Interval := Value;
1083	<	if not (csDesigning in ComponentState) then
1084	<	FTimer.Enabled := True;
1085	<	end;
1086	<	end;
1087	<
1088	<	function TIBDataBase.TestConnected: Boolean;
1089	<	var
1090	<	DatabaseInfo: TIBDatabaseInfo;
1091	<	begin
1092	<	result := Connected;
1093	<	if result then
1094	<	begin
1095	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1096	<	try
1097	<	DatabaseInfo.Database := self;
1098	<	{ poke the server to see if connected }
1099	<	if DatabaseInfo.BaseLevel = 0 then ;
1100	<	DatabaseInfo.Free;
1101	<	except
1102	<	ForceClose;
1103	<	result := False;
1104	<	DatabaseInfo.Free;
1105	<	end;
1106	<	end;
1107	<	end;
1108	<
1109	<	procedure TIBDataBase.TimeoutConnection(Sender: TObject);
1110	<	begin
1111	<	if Connected then
1112	<	begin
1113	<	if FCanTimeout then
1114	<	begin
1115	<	ForceClose;
1116	<	if Assigned(FOnIdleTimer) then
1117	<	FOnIdleTimer(Self);
1118	<	end
1119	<	else
1120	<	FCanTimeout := True;
1121	<	end;
1122	<	end;
1123	<
1124	<	function TIBDataBase.GetIsReadOnly: Boolean;
1125	<	var
1126	<	DatabaseInfo: TIBDatabaseInfo;
1127	<	begin
1128	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1129	<	DatabaseInfo.Database := self;
1130	<	if (DatabaseInfo.ODSMajorVersion < 10) then
1131	<	result := false
1132	<	else
1133	<	begin
1134	<	if (DatabaseInfo.ReadOnly = 0) then
1135	<	result := false
1136	<	else
1137	<	result := true;
1138	<	end;
1139	<	DatabaseInfo.Free;
1140	<	end;
1141	<
1142	<	function TIBDataBase.GetSQLDialect: Integer;
1143	<	begin
1144	<	Result := FSQLDialect;
1145	<	end;
1146	<
1147	<
1148	<	procedure TIBDataBase.SetSQLDialect( const Value: Integer);
1149	<	begin
1150	<	if (Value < 1) then IBError(ibxeSQLDialectInvalid, [nil]);
1151	<	if ((FHandle = nil) or (Value <= FDBSQLDialect))  then
1152	<	FSQLDialect := Value
1153	<	else
1154	<	IBError(ibxeSQLDialectInvalid, [nil]);
1155	<	end;
1156	<
1157	<	function TIBDataBase.GetDBSQLDialect: Integer;
1158	<	var
1159	<	DatabaseInfo: TIBDatabaseInfo;
1160	<	begin
1161	<	DatabaseInfo := TIBDatabaseInfo.Create(self);
1162	<	DatabaseInfo.Database := self;
1163	<	result := DatabaseInfo.DBSQLDialect;
1164	<	DatabaseInfo.Free;
1165	<	end;
1166	<
1167	<	procedure TIBDataBase.ValidateClientSQLDialect;
1168	<	begin
1169	<	if (FDBSQLDialect < FSQLDialect) then
1170	<	begin
1171	<	FSQLDialect := FDBSQLDialect;
1172	<	if Assigned (FOnDialectDowngradeWarning) then
1173	<	FOnDialectDowngradeWarning(self);
1174	<	end;
1175	<	end;
1176	<
1177	<	procedure TIBDataBase.ApplyUpdates( const DataSets: array of TDataSet);
1178	<	var
1179	<	I: Integer;
1180	<	DS: TIBCustomDataSet;
1181	<	TR: TIBTransaction;
1182	<	begin
1183	<	TR := nil;
1184	<	for I := 0 to High(DataSets) do
1185	<	begin
1186	<	DS := TIBCustomDataSet(DataSets[I]);
1187	<	if DS.Database <> Self then
1188	<	IBError(ibxeUpdateWrongDB, [nil]);
1189	<	if TR = nil then
1190	<	TR := DS.Transaction;
1191	<	if (DS.Transaction <> TR) or (TR = nil) then
1192	<	IBError(ibxeUpdateWrongTR, [nil]);
1193	<	end;
1194	<	TR.CheckInTransaction;
1195	<	for I := 0 to High(DataSets) do
1196	<	begin
1197	<	DS := TIBCustomDataSet(DataSets[I]);
1198	<	DS.ApplyUpdates;
1199	<	end;
1200	<	TR.CommitRetaining;
1201	<	end;
1202	<
1203	<	procedure TIBDataBase.CloseDataSets;
1204	<	var
1205	<	i: Integer;
1206	<	begin
1207	<	for i := 0 to DataSetCount - 1 do
1208	<	if (DataSets[i] <> nil) then
1209	<	DataSets[i].close;
1210	<	end;
1211	<
1212	<	function TIBDataBase.GetDataset(Index: longint): TDataset;
1213	<	begin
1214	<	if (Index >= 0) and (Index < FDataSets.Count) then
1215	<	Result := TDataSet(FDataSets[Index])
1216	<	else
1217	<	raise Exception.Create('Invalid Index to DataSets');
1218	<	end;
1219	<
1220	<	function TIBDataBase.GetDataSetCount: Longint;
1221	<	begin
1222	<	Result := FDataSets.Count;
1223	<	end;
1224	<
1225	<	procedure TIBDataBase.ReadState(Reader: TReader);
1226	<	begin
1227	<	FDBParams.Clear;
1228	<	inherited ReadState(Reader);
1229	<	end;
1230	<
1231	<	procedure TIBDataBase.SetConnected(Value: boolean);
1232	<	begin
1233	<	if StreamedConnected and not AllowStreamedConnected then
1234	<	begin
1235	<	StreamedConnected := false;
1236	<	Value := false
1237	<	end;
1238	<	inherited SetConnected(Value);
1239	<	end;
1240	<
1241	<	procedure TIBDataBase.GetFieldNames( const TableName: string; List: TStrings);
1242	<	var
1243	<	Query: TIBSQL;
1244	<	begin
1245	<	if TableName = '' then
1246	<	IBError(ibxeNoTableName, [nil]);
1247	<	if not Connected then
1248	<	Open;
1249	<	if not FInternalTransaction.Active then
1250	<	FInternalTransaction.StartTransaction;
1251	<	Query := TIBSQL.Create(self);
1252	<	try
1253	<	Query.GoToFirstRecordOnExecute := False;
1254	<	Query.Database := Self;
1255	<	Query.Transaction := FInternalTransaction;
1256	<	Query.SQL.Text := 'Select R.RDB$FIELD_NAME ' + {do not localize}
1257	<	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
1258	<	'where R.RDB$RELATION_NAME = ' + {do not localize}
1259	<	'''' +
1260	<	FormatIdentifierValue(SQLDialect, TableName) +
1261	<	''' ' +
1262	<	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '; {do not localize}
1263	<	Query.Prepare;
1264	<	Query.ExecQuery;
1265	<	with List do
1266	<	begin
1267	<	BeginUpdate;
1268	<	try
1269	<	Clear;
1270	<	while (not Query.EOF) and (Query.Next <> nil) do
1271	<	List.Add(TrimRight(Query.Current.ByName('RDB$FIELD_NAME').AsString)); {do not localize}
1272	<	finally
1273	<	EndUpdate;
1274	<	end;
1275	<	end;
1276	<	finally
1277	<	Query.free;
1278	<	FInternalTransaction.Commit;
1279	<	end;
1280	<	end;
1281	<
1282	<	procedure TIBDataBase.GetTableNames(List: TStrings; SystemTables: Boolean);
1283	<	var
1284	<	Query : TIBSQL;
1285	<	begin
1286	<	if not (csReading in ComponentState) then
1287	<	begin
1288	<	if not Connected then
1289	<	Open;
1290	<	if not FInternalTransaction.Active then
1291	<	FInternalTransaction.StartTransaction;
1292	<	Query := TIBSQL.Create(self);
1293	<	try
1294	<	Query.GoToFirstRecordOnExecute := False;
1295	<	Query.Database := Self;
1296	<	Query.Transaction := FInternalTransaction;
1297	<	if SystemTables then
1298	<	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1299	<	' where RDB$VIEW_BLR is NULL' {do not localize}
1300	<	else
1301	<	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1302	<	' where RDB$VIEW_BLR is NULL and RDB$SYSTEM_FLAG = 0'; {do not localize}
1303	<	Query.Prepare;
1304	<	Query.ExecQuery;
1305	<	with List do
1306	<	begin
1307	<	BeginUpdate;
1308	<	try
1309	<	Clear;
1310	<	while (not Query.EOF) and (Query.Next <> nil) do
1311	<	List.Add(TrimRight(Query.Current[0].AsString));
1312	<	finally
1313	<	EndUpdate;
1314	<	end;
1315	<	end;
1316	<	finally
1317	<	Query.Free;
1318	<	FInternalTransaction.Commit;
1319	<	end;
1320	<	end;
1321	<	end;
1322	<
1323	<	{ TIBTransaction }
1324	<
1325	<	constructor TIBTransaction.Create(AOwner: TComponent);
1326	<	begin
1327	<	inherited Create(AOwner);
1328	<	FIBLoaded := False;
1329	<	CheckIBLoaded;
1330	<	FIBLoaded := True;
1331	<	CheckIBLoaded;
1332	<	FDatabases := TList.Create;
1333	<	FSQLObjects := TList.Create;
1334	<	FHandle := nil;
1335	<	FTPB := nil;
1336	<	FTPBLength := 0;
1337	<	FTRParams := TStringList.Create;
1338	<	FTRParamsChanged := True;
1339	<	TStringList(FTRParams).OnChange := TRParamsChange;
1340	<	TStringList(FTRParams).OnChanging := TRParamsChanging;
1341	<	FTimer := TTimer.Create(Self);
1342	<	FTimer.Enabled := False;
1343	<	FTimer.Interval := 0;
1344	<	FTimer.OnTimer := TimeoutTransaction;
1345	<	FDefaultAction := taCommit;
1346	<	end;
1347	<
1348	<	destructor TIBTransaction.Destroy;
1349	<	var
1350	<	i: Integer;
1351	<	begin
1352	<	if FIBLoaded then
1353	<	begin
1354	<	if InTransaction then
1355	<	EndTransaction(FDefaultAction, True);
1356	<	for i := 0 to FSQLObjects.Count - 1 do
1357	<	if FSQLObjects[i] <> nil then
1358	<	SQLObjects[i].DoTransactionFree;
1359	<	RemoveSQLObjects;
1360	<	RemoveDatabases;
1361	<	FreeMem(FTPB);
1362	<	FTPB := nil;
1363	<	FTRParams.Free;
1364	<	FSQLObjects.Free;
1365	<	FDatabases.Free;
1366	<	end;
1367	<	inherited Destroy;
1368	<	end;
1369	<
1370	<	function TIBTransaction.Call(ErrCode: ISC_STATUS;
1371	<	RaiseError: Boolean): ISC_STATUS;
1372	<	var
1373	<	i: Integer;
1374	<	begin
1375	<	result := ErrCode;
1376	<	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1377	<	Databases[i].FCanTimeout := False;
1378	<	FCanTimeout := False;
1379	<	if RaiseError and (result > 0) then
1380	<	IBDataBaseError;
1381	<	end;
1382	<
1383	<	procedure TIBTransaction.CheckDatabasesInList;
1384	<	begin
1385	<	if GetDatabaseCount = 0 then
1386	<	IBError(ibxeNoDatabasesInTransaction, [nil]);
1387	<	end;
1388	<
1389	<	procedure TIBTransaction.CheckInTransaction;
1390	<	begin
1391	<	if FStreamedActive and (not InTransaction) then
1392	<	Loaded;
1393	<	if (FHandle = nil) then
1394	<	IBError(ibxeNotInTransaction, [nil]);
1395	<	end;
1396	<
1397	<	procedure TIBTransaction.DoBeforeTransactionEnd;
1398	<	begin
1399	<	if Assigned(FBeforeTransactionEnd) then
1400	<	FBeforeTransactionEnd(self);
1401	<	end;
1402	<
1403	<	procedure TIBTransaction.DoAfterTransactionEnd;
1404	<	begin
1405	<	if Assigned(FAfterTransactionEnd) then
1406	<	FAfterTransactionEnd(self);
1407	<	end;
1408	<
1409	<	procedure TIBTransaction.EnsureNotInTransaction;
1410	<	begin
1411	<	if csDesigning in ComponentState then
1412	<	begin
1413	<	if FHandle <> nil then
1414	<	Rollback;
1415	<	end;
1416	<	end;
1417	<
1418	<	procedure TIBTransaction.CheckNotInTransaction;
1419	<	begin
1420	<	if (FHandle <> nil) then
1421	<	IBError(ibxeInTransaction, [nil]);
1422	<	end;
1423	<
1424	<	function TIBTransaction.AddDatabase(db: TIBDatabase): Integer;
1425	<	var
1426	<	i: Integer;
1427	<	NilFound: Boolean;
1428	<	begin
1429	<	i := FindDatabase(db);
1430	<	if i <> -1 then
1431	<	begin
1432	<	result := i;
1433	<	exit;
1434	<	end;
1435	<	NilFound := False;
1436	<	i := 0;
1437	<	while (not NilFound) and (i < FDatabases.Count) do
1438	<	begin
1439	<	NilFound := (FDatabases[i] = nil);
1440	<	if (not NilFound) then
1441	<	Inc(i);
1442	<	end;
1443	<	if (NilFound) then
1444	<	begin
1445	<	FDatabases[i] := db;
1446	<	result := i;
1447	<	end
1448	<	else
1449	<	begin
1450	<	result := FDatabases.Count;
1451	<	FDatabases.Add(db);
1452	<	end;
1453	<	end;
1454	<
1455	<	function TIBTransaction.AddSQLObject(ds: TIBBase): Integer;
1456	<	begin
1457	<	result := 0;
1458	<	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
1459	<	Inc(result);
1460	<	if (result = FSQLObjects.Count) then
1461	<	FSQLObjects.Add(ds)
1462	<	else
1463	<	FSQLObjects[result] := ds;
1464	<	end;
1465	<
1466	<	procedure TIBTransaction.Commit;
1467	<	begin
1468	<	EndTransaction(TACommit, False);
1469	<	end;
1470	<
1471	<	procedure TIBTransaction.CommitRetaining;
1472	<	begin
1473	<	EndTransaction(TACommitRetaining, False);
1474	<	end;
1475	<
1476	<	procedure TIBTransaction.EndTransaction(Action: TTransactionAction;
1477	<	Force: Boolean);
1478	<	var
1479	<	status: ISC_STATUS;
1480	<	i: Integer;
1481	<	begin
1482	<	CheckInTransaction;
1483	<	if FInEndTransaction then Exit;
1484	<	FInEndTransaction := true;
1485	<	FEndAction := Action;
1486	<	try
1487	<	case Action of
1488	<	TARollback, TACommit:
1489	<	begin
1490	<	if (HandleIsShared) and
1491	<	(Action <> FDefaultAction) and
1492	<	(not Force) then
1493	<	IBError(ibxeCantEndSharedTransaction, [nil]);
1494	<	DoBeforeTransactionEnd;
1495	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1496	<	SQLObjects[i].DoBeforeTransactionEnd;
1497	<	if InTransaction then
1498	<	begin
1499	<	if HandleIsShared then
1500	<	begin
1501	<	FHandle := nil;
1502	<	FHandleIsShared := False;
1503	<	status := 0;
1504	<	end
1505	<	else
1506	<	if (Action = TARollback) then
1507	<	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False)
1508	<	else
1509	<	status := Call(isc_commit_transaction(StatusVector, @FHandle), False);
1510	<	if ((Force) and (status > 0)) then
1511	<	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False);
1512	<	if Force then
1513	<	FHandle := nil
1514	<	else
1515	<	if (status > 0) then
1516	<	IBDataBaseError;
1517	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1518	<	SQLObjects[i].DoAfterTransactionEnd;
1519	<	DoAfterTransactionEnd;
1520	<	end;
1521	<	end;
1522	<	TACommitRetaining:
1523	<	Call(isc_commit_retaining(StatusVector, @FHandle), True);
1524	<	TARollbackRetaining:
1525	<	Call(isc_rollback_retaining(StatusVector, @FHandle), True);
1526	<	end;
1527	<	if not (csDesigning in ComponentState) then
1528	<	begin
1529	<	case Action of
1530	<	TACommit:
1531	<	MonitorHook.TRCommit(Self);
1532	<	TARollback:
1533	<	MonitorHook.TRRollback(Self);
1534	<	TACommitRetaining:
1535	<	MonitorHook.TRCommitRetaining(Self);
1536	<	TARollbackRetaining:
1537	<	MonitorHook.TRRollbackRetaining(Self);
1538	<	end;
1539	<	end;
1540	<	finally
1541	<	FInEndTransaction := false
1542	<	end;
1543	<	end;
1544	<
1545	<	function TIBTransaction.GetDatabase(Index: Integer): TIBDatabase;
1546	<	begin
1547	<	result := FDatabases[Index];
1548	<	end;
1549	<
1550	<	function TIBTransaction.GetDatabaseCount: Integer;
1551	<	var
1552	<	i, Cnt: Integer;
1553	<	begin
1554	<	result := 0;
1555	<	Cnt := FDatabases.Count - 1;
1556	<	for i := 0 to Cnt do if FDatabases[i] <> nil then
1557	<	Inc(result);
1558	<	end;
1559	<
1560	<	function TIBTransaction.GetSQLObject(Index: Integer): TIBBase;
1561	<	begin
1562	<	result := FSQLObjects[Index];
1563	<	end;
1564	<
1565	<	function TIBTransaction.GetSQLObjectCount: Integer;
1566	<	var
1567	<	i, Cnt: Integer;
1568	<	begin
1569	<	result := 0;
1570	<	Cnt := FSQLObjects.Count - 1;
1571	<	for i := 0 to Cnt do if FSQLObjects[i] <> nil then
1572	<	Inc(result);
1573	<	end;
1574	<
1575	<	function TIBTransaction.GetInTransaction: Boolean;
1576	<	begin
1577	<	result := (FHandle <> nil);
1578	<	end;
1579	<
1580	<	function TIBTransaction.FindDatabase(db: TIBDatabase): Integer;
1581	<	var
1582	<	i: Integer;
1583	<	begin
1584	<	result := -1;
1585	<	for i := 0 to FDatabases.Count - 1 do
1586	<	if db = TIBDatabase(FDatabases[i]) then
1587	<	begin
1588	<	result := i;
1589	<	break;
1590	<	end;
1591	<	end;
1592	<
1593	<	function TIBTransaction.FindDefaultDatabase: TIBDatabase;
1594	<	var
1595	<	i: Integer;
1596	<	begin
1597	<	result := FDefaultDatabase;
1598	<	if result = nil then
1599	<	begin
1600	<	for i := 0 to FDatabases.Count - 1 do
1601	<	if (TIBDatabase(FDatabases[i]) <> nil) and
1602	<	(TIBDatabase(FDatabases[i]).DefaultTransaction = self) then
1603	<	begin
1604	<	result := TIBDatabase(FDatabases[i]);
1605	<	break;
1606	<	end;
1607	<	end;
1608	<	end;
1609	<
1610	<	function TIBTransaction.GetEndAction: TTransactionAction;
1611	<	begin
1612	<	if FInEndTransaction then
1613	<	Result := FEndAction
1614	<	else
1615	<	IBError(ibxeIB60feature, [nil])
1616	<	end;
1617	<
1618	<
1619	<	function TIBTransaction.GetIdleTimer: Integer;
1620	<	begin
1621	<	result := FTimer.Interval;
1622	<	end;
1623	<
1624	<	procedure TIBTransaction.Loaded;
1625	<	begin
1626	<	inherited Loaded;
1627	<	end;
1628	<
1629	<	procedure TIBTransaction.BeforeDatabaseDisconnect(DB: TIBDatabase);
1630	<	begin
1631	<	if InTransaction then
1632	<	EndTransaction(FDefaultAction, True);
1633	<	end;
1634	<
1635	<	procedure TIBTransaction.RemoveDatabase(Idx: Integer);
1636	<	var
1637	<	DB: TIBDatabase;
1638	<	begin
1639	<	if ((Idx >= 0) and (FDatabases[Idx] <> nil)) then
1640	<	begin
1641	<	DB := Databases[Idx];
1642	<	FDatabases[Idx] := nil;
1643	<	DB.RemoveTransaction(DB.FindTransaction(Self));
1644	<	if DB = FDefaultDatabase then
1645	<	FDefaultDatabase := nil;
1646	<	end;
1647	<	end;
1648	<
1649	<	procedure TIBTransaction.RemoveDatabases;
1650	<	var
1651	<	i: Integer;
1652	<	begin
1653	<	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1654	<	RemoveDatabase(i);
1655	<	end;
1656	<
1657	<	procedure TIBTransaction.RemoveSQLObject(Idx: Integer);
1658	<	var
1659	<	ds: TIBBase;
1660	<	begin
1661	<	if ((Idx >= 0) and (FSQLObjects[Idx] <> nil)) then
1662	<	begin
1663	<	ds := SQLObjects[Idx];
1664	<	FSQLObjects[Idx] := nil;
1665	<	ds.Transaction := nil;
1666	<	end;
1667	<	end;
1668	<
1669	<	procedure TIBTransaction.RemoveSQLObjects;
1670	<	var
1671	<	i: Integer;
1672	<	begin
1673	<	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1674	<	RemoveSQLObject(i);
1675	<	end;
1676	<
1677	<	procedure TIBTransaction.Rollback;
1678	<	begin
1679	<	EndTransaction(TARollback, False);
1680	<	end;
1681	<
1682	<	procedure TIBTransaction.RollbackRetaining;
1683	<	begin
1684	<	EndTransaction(TARollbackRetaining, False);
1685	<	end;
1686	<
1687	<	procedure TIBTransaction.SetActive(Value: Boolean);
1688	<	begin
1689	<	if csReading in ComponentState then
1690	<	FStreamedActive := Value
1691	<	else
1692	<	if Value and not InTransaction then
1693	<	StartTransaction
1694	<	else
1695	<	if not Value and InTransaction then
1696	<	Rollback;
1697	<	end;
1698	<
1699	<	procedure TIBTransaction.SetDefaultAction(Value: TTransactionAction);
1700	<	begin
1701	<	(*  if (Value = taRollbackRetaining) and (GetIBClientVersion < 6) then
1702	<	IBError(ibxeIB60feature, [nil]);*)
1703	<	FDefaultAction := Value;
1704	<	end;
1705	<
1706	<	procedure TIBTransaction.SetDefaultDatabase(Value: TIBDatabase);
1707	<	var
1708	<	i: integer;
1709	<	begin
1710	<	if (FDefaultDatabase <> nil) and (FDefaultDatabase <> Value) then
1711	<	begin
1712	<	i := FDefaultDatabase.FindTransaction(self);
1713	<	if (i <> -1) then
1714	<	FDefaultDatabase.RemoveTransaction(i);
1715	<	end;
1716	<	if (Value <> nil) and (FDefaultDatabase <> Value) then
1717	<	begin
1718	<	Value.AddTransaction(Self);
1719	<	AddDatabase(Value);
1720	<	for i := 0 to FSQLObjects.Count - 1 do
1721	<	if (FSQLObjects[i] <> nil) and
1722	<	(TIBBase(FSQLObjects[i]).Database = nil) then
1723	<	SetObjectProp(TIBBase(FSQLObjects[i]).Owner, 'Database', Value);
1724	<	end;
1725	<	FDefaultDatabase := Value;
1726	<	end;
1727	<
1728	<	procedure TIBTransaction.SetHandle(Value: TISC_TR_HANDLE);
1729	<	begin
1730	<	if (HandleIsShared) then
1731	<	EndTransaction(DefaultAction, True)
1732	<	else
1733	<	CheckNotInTransaction;
1734	<	FHandle := Value;
1735	<	FHandleIsShared := (Value <> nil);
1736	<	end;
1737	<
1738	<	procedure TIBTransaction.Notification( AComponent: TComponent;
1739	<	Operation: TOperation);
1740	<	var
1741	<	i: Integer;
1742	<	begin
1743	<	inherited Notification( AComponent, Operation);
1744	<	if (Operation = opRemove) and (AComponent = FDefaultDatabase) then
1745	<	begin
1746	<	i := FindDatabase(FDefaultDatabase);
1747	<	if (i <> -1) then
1748	<	RemoveDatabase(i);
1749	<	FDefaultDatabase := nil;
1750	<	end;
1751	<	end;
1752	<
1753	<	procedure TIBTransaction.SetIdleTimer(Value: Integer);
1754	<	begin
1755	<	if Value < 0 then
1756	<	IBError(ibxeTimeoutNegative, [nil])
1757	<	else
1758	<	if (Value = 0) then
1759	<	begin
1760	<	FTimer.Enabled := False;
1761	<	FTimer.Interval := 0;
1762	<	end
1763	<	else
1764	<	if (Value > 0) then
1765	<	begin
1766	<	FTimer.Interval := Value;
1767	<	if not (csDesigning in ComponentState) then
1768	<	FTimer.Enabled := True;
1769	<	end;
1770	<	end;
1771	<
1772	<	procedure TIBTransaction.SetTRParams(Value: TStrings);
1773	<	begin
1774	<	FTRParams.Assign(Value);
1775	<	end;
1776	<
1777	<	procedure TIBTransaction.StartTransaction;
1778	<	var
1779	<	pteb: PISC_TEB_ARRAY;
1780	<	TPB: String;
1781	<	i: Integer;
1782	<	begin
1783	<	CheckNotInTransaction;
1784	<	CheckDatabasesInList;
1785	<	for i := 0 to FDatabases.Count - 1 do
1786	<	if  FDatabases[i] <> nil then
1787	<	begin
1788	<	with TIBDatabase(FDatabases[i]) do
1789	<	if not Connected then
1790	<	if FStreamedConnected then
1791	<	begin
1792	<	Open;
1793	<	FStreamedConnected := False;
1794	<	end
1795	<	else
1796	<	IBError(ibxeDatabaseClosed, [nil]);
1797	<	end;
1798	<	if FTRParamsChanged then
1799	<	begin
1800	<	FTRParamsChanged := False;
1801	<	GenerateTPB(FTRParams, TPB, FTPBLength);
1802	<	if FTPBLength > 0 then
1803	<	begin
1804	<	IBAlloc(FTPB, 0, FTPBLength);
1805	<	Move(TPB[1], FTPB[0], FTPBLength);
1806	<	end;
1807	<	end;
1808	<
1809	<	pteb := nil;
1810	<	IBAlloc(pteb, 0, DatabaseCount * SizeOf(TISC_TEB));
1811	<	try
1812	<	for i := 0 to DatabaseCount - 1 do if Databases[i] <> nil then
1813	<	begin
1814	<	pteb^[i].db_handle := @(Databases[i].Handle);
1815	<	pteb^[i].tpb_length := FTPBLength;
1816	<	pteb^[i].tpb_address := FTPB;
1817	<	end;
1818	<	if Call(isc_start_multiple(StatusVector, @FHandle,
1819	<	DatabaseCount, PISC_TEB(pteb)), False) > 0 then
1820	<	begin
1821	<	FHandle := nil;
1822	<	IBDataBaseError;
1823	<	end;
1824	<	if not (csDesigning in ComponentState) then
1825	<	MonitorHook.TRStart(Self);
1826	<	finally
1827	<	FreeMem(pteb);
1828	<	end;
1829	<	end;
1830	<
1831	<	procedure TIBTransaction.TimeoutTransaction(Sender: TObject);
1832	<	begin
1833	<	if InTransaction then
1834	<	begin
1835	<	if FCanTimeout then
1836	<	begin
1837	<	EndTransaction(FDefaultAction, True);
1838	<	if Assigned(FOnIdleTimer) then
1839	<	FOnIdleTimer(Self);
1840	<	end
1841	<	else
1842	<	FCanTimeout := True;
1843	<	end;
1844	<	end;
1845	<
1846	<	procedure TIBTransaction.TRParamsChange(Sender: TObject);
1847	<	begin
1848	<	FTRParamsChanged := True;
1849	<	end;
1850	<
1851	<	procedure TIBTransaction.TRParamsChanging(Sender: TObject);
1852	<	begin
1853	<	EnsureNotInTransaction;
1854	<	CheckNotInTransaction;
1855	<	end;
1856	<
1857	<	{ TIBBase }
1858	<	constructor TIBBase.Create(AOwner: TObject);
1859	<	begin
1860	<	FOwner := AOwner;
1861	<	end;
1862	<
1863	<	destructor TIBBase.Destroy;
1864	<	begin
1865	<	SetDatabase(nil);
1866	<	SetTransaction(nil);
1867	<	inherited Destroy;
1868	<	end;
1869	<
1870	<	procedure TIBBase.CheckDatabase;
1871	<	begin
1872	<	if (FDatabase = nil) then
1873	<	IBError(ibxeDatabaseNotAssigned, [nil]);
1874	<	FDatabase.CheckActive;
1875	<	end;
1876	<
1877	<	procedure TIBBase.CheckTransaction;
1878	<	begin
1879	<	if FTransaction = nil then
1880	<	IBError(ibxeTransactionNotAssigned, [nil]);
1881	<	FTransaction.CheckInTransaction;
1882	<	end;
1883	<
1884	<	function TIBBase.GetDBHandle: PISC_DB_HANDLE;
1885	<	begin
1886	<	CheckDatabase;
1887	<	result := @FDatabase.Handle;
1888	<	end;
1889	<
1890	<	function TIBBase.GetTRHandle: PISC_TR_HANDLE;
1891	<	begin
1892	<	CheckTransaction;
1893	<	result := @FTransaction.Handle;
1894	<	end;
1895	<
1896	<	procedure TIBBase.DoAfterDatabaseConnect;
1897	<	begin
1898	<	if assigned(FAfterDatabaseConnect) then
1899	<	AfterDatabaseConnect(self);
1900	<	end;
1901	<
1902	<	procedure TIBBase.DoBeforeDatabaseDisconnect;
1903	<	begin
1904	<	if Assigned(BeforeDatabaseDisconnect) then
1905	<	BeforeDatabaseDisconnect(Self);
1906	<	end;
1907	<
1908	<	procedure TIBBase.DoAfterDatabaseDisconnect;
1909	<	begin
1910	<	if Assigned(AfterDatabaseDisconnect) then
1911	<	AfterDatabaseDisconnect(Self);
1912	<	end;
1913	<
1914	<	procedure TIBBase.DoDatabaseFree;
1915	<	begin
1916	<	if Assigned(OnDatabaseFree) then
1917	<	OnDatabaseFree(Self);
1918	<	SetDatabase(nil);
1919	<	SetTransaction(nil);
1920	<	end;
1921	<
1922	<	procedure TIBBase.DoBeforeTransactionEnd;
1923	<	begin
1924	<	if Assigned(BeforeTransactionEnd) then
1925	<	BeforeTransactionEnd(Self);
1926	<	end;
1927	<
1928	<	procedure TIBBase.DoAfterTransactionEnd;
1929	<	begin
1930	<	if Assigned(AfterTransactionEnd) then
1931	<	AfterTransactionEnd(Self);
1932	<	end;
1933	<
1934	<	procedure TIBBase.DoTransactionFree;
1935	<	begin
1936	<	if Assigned(OnTransactionFree) then
1937	<	OnTransactionFree(Self);
1938	<	FTransaction := nil;
1939	<	end;
1940	<
1941	<	procedure TIBBase.SetDatabase(Value: TIBDatabase);
1942	<	begin
1943	<	if (FDatabase <> nil) then
1944	<	FDatabase.RemoveSQLObject(FIndexInDatabase);
1945	<	FDatabase := Value;
1946	<	if (FDatabase <> nil) then
1947	<	begin
1948	<	FIndexInDatabase := FDatabase.AddSQLObject(Self);
1949	<	if (FTransaction = nil) then
1950	<	Transaction := FDatabase.FindDefaultTransaction;
1951	<	end;
1952	<	end;
1953	<
1954	<	procedure TIBBase.SetTransaction(Value: TIBTransaction);
1955	<	begin
1956	<	if (FTransaction <> nil) then
1957	<	FTransaction.RemoveSQLObject(FIndexInTransaction);
1958	<	FTransaction := Value;
1959	<	if (FTransaction <> nil) then
1960	<	begin
1961	<	FIndexInTransaction := FTransaction.AddSQLObject(Self);
1962	<	if (FDatabase = nil) then
1963	<	Database := FTransaction.FindDefaultDatabase;
1964	<	end;
1965	<	end;
1966	<
1967	<	{ GenerateDPB -
1968	<	Given a string containing a textual representation
1969	<	of the database parameters, generate a database
1970	<	parameter buffer, and return it and its length
1971	<	in DPB and DPBLength, respectively. }
1972	<
1973	<	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
1974	<	var
1975	<	i, j, pval: Integer;
1976	<	DPBVal: UShort;
1977	<	ParamName, ParamValue: string;
1978	<	begin
1979	<	{ The DPB is initially empty, with the exception that
1980	<	the DPB version must be the first byte of the string. }
1981	<	DPBLength := 1;
1982	<	DPB := Char(isc_dpb_version1);
1983	<
1984	<	{Iterate through the textual database parameters, constructing
1985	<	a DPB on-the-fly }
1986	<	for i := 0 to sl.Count - 1 do
1987	<	begin
1988	<	{ Get the parameter's name and value from the list,
1989	<	and make sure that the name is all lowercase with
1990	<	no leading 'isc_dpb_' prefix
1991	<	}
1992	<	if (Trim(sl.Names[i]) = '') then
1993	<	continue;
1994	<	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
1995	<	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
1996	<	if (Pos(DPBPrefix, ParamName) = 1) then {mbcs ok}
1997	<	Delete(ParamName, 1, Length(DPBPrefix));
1998	<	{ We want to translate the parameter name to some Integer
1999	<	value. We do this by scanning through a list of known
2000	<	database parameter names (DPBConstantNames, defined above) }
2001	<	DPBVal := 0;
2002	<	{ Find the parameter }
2003	<	for j := 1 to isc_dpb_last_dpb_constant do
2004	<	if (ParamName = DPBConstantNames[j]) then
2005	<	begin
2006	<	DPBVal := j;
2007	<	break;
2008	<	end;
2009	<	{  A database parameter either contains a string value (case 1)
2010	<	or an Integer value (case 2)
2011	<	or no value at all (case 3)
2012	<	or an error needs to be generated (case else)  }
2013	<	case DPBVal of
2014	<	isc_dpb_user_name, isc_dpb_password, isc_dpb_password_enc,
2015	<	isc_dpb_sys_user_name, isc_dpb_license, isc_dpb_encrypt_key,
2016	<	isc_dpb_lc_messages, isc_dpb_lc_ctype,
2017	<	isc_dpb_sql_role_name, isc_dpb_sql_dialect:
2018	<	begin
2019	<	if DPBVal = isc_dpb_sql_dialect then
2020	<	ParamValue[1] := Char(Ord(ParamValue[1]) - 48);
2021	<	DPB := DPB +
2022	<	Char(DPBVal) +
2023	<	Char(Length(ParamValue)) +
2024	<	ParamValue;
2025	<	Inc(DPBLength, 2 + Length(ParamValue));
2026	<	end;
2027	<	isc_dpb_num_buffers, isc_dpb_dbkey_scope, isc_dpb_force_write,
2028	<	isc_dpb_no_reserve, isc_dpb_damaged, isc_dpb_verify:
2029	<	begin
2030	<	DPB := DPB +
2031	<	Char(DPBVal) +
2032	<	#1 +
2033	<	Char(StrToInt(ParamValue));
2034	<	Inc(DPBLength, 3);
2035	<	end;
2036	<	isc_dpb_sweep:
2037	<	begin
2038	<	DPB := DPB +
2039	<	Char(DPBVal) +
2040	<	#1 +
2041	<	Char(isc_dpb_records);
2042	<	Inc(DPBLength, 3);
2043	<	end;
2044	<	isc_dpb_sweep_interval:
2045	<	begin
2046	<	pval := StrToInt(ParamValue);
2047	<	DPB := DPB +
2048	<	Char(DPBVal) +
2049	<	#4 +
2050	<	PChar(@pval)[0] +
2051	<	PChar(@pval)[1] +
2052	<	PChar(@pval)[2] +
2053	<	PChar(@pval)[3];
2054	<	Inc(DPBLength, 6);
2055	<	end;
2056	<	isc_dpb_activate_shadow, isc_dpb_delete_shadow, isc_dpb_begin_log,
2057	<	isc_dpb_quit_log:
2058	<	begin
2059	<	DPB := DPB +
2060	<	Char(DPBVal) +
2061	<	#1 + #0;
2062	<	Inc(DPBLength, 3);
2063	<	end;
2064	<	else
2065	<	begin
2066	<	if (DPBVal > 0) and
2067	<	(DPBVal <= isc_dpb_last_dpb_constant) then
2068	<	IBError(ibxeDPBConstantNotSupported, [DPBConstantNames[DPBVal]])
2069	<	else
2070	<	IBError(ibxeDPBConstantUnknownEx, [sl.Names[i]]);
2071	<	end;
2072	<	end;
2073	<	end;
2074	<	end;
2075	<
2076	<	{ GenerateTPB -
2077	<	Given a string containing a textual representation
2078	<	of the transaction parameters, generate a transaction
2079	<	parameter buffer, and return it and its length in
2080	<	TPB and TPBLength, respectively. }
2081	<	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
2082	<	var
2083	<	i, j, TPBVal, ParamLength: Integer;
2084	<	ParamName, ParamValue: string;
2085	<	begin
2086	<	TPB := '';
2087	<	if (sl.Count = 0) then
2088	<	TPBLength := 0
2089	<	else
2090	<	begin
2091	<	TPBLength := sl.Count + 1;
2092	<	TPB := TPB + Char(isc_tpb_version3);
2093	<	end;
2094	<	for i := 0 to sl.Count - 1 do
2095	<	begin
2096	<	if (Trim(sl[i]) =  '') then
2097	<	begin
2098	<	Dec(TPBLength);
2099	<	Continue;
2100	<	end;
2101	<	if (Pos('=', sl[i]) = 0) then {mbcs ok}
2102	<	ParamName := LowerCase(sl[i]) {mbcs ok}
2103	<	else
2104	<	begin
2105	<	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
2106	<	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
2107	<	end;
2108	<	if (Pos(TPBPrefix, ParamName) = 1) then {mbcs ok}
2109	<	Delete(ParamName, 1, Length(TPBPrefix));
2110	<	TPBVal := 0;
2111	<	{ Find the parameter }
2112	<	for j := 1 to isc_tpb_last_tpb_constant do
2113	<	if (ParamName = TPBConstantNames[j]) then
2114	<	begin
2115	<	TPBVal := j;
2116	<	break;
2117	<	end;
2118	<	{ Now act on it }
2119	<	case TPBVal of
2120	<	isc_tpb_consistency, isc_tpb_exclusive, isc_tpb_protected,
2121	<	isc_tpb_concurrency, isc_tpb_shared, isc_tpb_wait, isc_tpb_nowait,
2122	<	isc_tpb_read, isc_tpb_write, isc_tpb_ignore_limbo,
2123	<	isc_tpb_read_committed, isc_tpb_rec_version, isc_tpb_no_rec_version:
2124	<	TPB := TPB + Char(TPBVal);
2125	<	isc_tpb_lock_read, isc_tpb_lock_write:
2126	<	begin
2127	<	TPB := TPB + Char(TPBVal);
2128	<	{ Now set the string parameter }
2129	<	ParamLength := Length(ParamValue);
2130	<	Inc(TPBLength, ParamLength + 1);
2131	<	TPB := TPB + Char(ParamLength) + ParamValue;
2132	<	end;
2133	<	else
2134	<	begin
2135	<	if (TPBVal > 0) and
2136	<	(TPBVal <= isc_tpb_last_tpb_constant) then
2137	<	IBError(ibxeTPBConstantNotSupported, [TPBConstantNames[TPBVal]])
2138	<	else
2139	<	IBError(ibxeTPBConstantUnknownEx, [sl.Names[i]]);
2140	<	end;
2141	<	end;
2142	<	end;
2143	<	end;
2144	<
2145	<	end.
2146	<
2147	<
2148	<
2149	<
2150	<
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	>	FCharSetNames: array of string;
187	>	procedure EnsureInactive;
188	>	function GetDBSQLDialect: Integer;
189	>	function GetSQLDialect: Integer;
190	>	procedure SetSQLDialect(const Value: Integer);
191	>	procedure ValidateClientSQLDialect;
192	>	procedure DBParamsChange(Sender: TObject);
193	>	procedure DBParamsChanging(Sender: TObject);
194	>	function GetSQLObject(Index: Integer): TIBBase;
195	>	function GetSQLObjectCount: Integer;
196	>	function GetDBParamByDPB(const Idx: Integer): String;
197	>	function GetIdleTimer: Integer;
198	>	function GetTransaction(Index: Integer): TIBTransaction;
199	>	function GetTransactionCount: Integer;
200	>	function Login: Boolean;
201	>	procedure LoadCharSetInfo;
202	>	procedure SetDatabaseName(const Value: TIBFileName);
203	>	procedure SetDBParamByDPB(const Idx: Integer; Value: String);
204	>	procedure SetDBParams(Value: TStrings);
205	>	procedure SetDefaultTransaction(Value: TIBTransaction);
206	>	procedure SetIdleTimer(Value: Integer);
207	>	procedure TimeoutConnection(Sender: TObject);
208	>	function GetIsReadOnly: Boolean;
209	>	function AddSQLObject(ds: TIBBase): Integer;
210	>	procedure RemoveSQLObject(Idx: Integer);
211	>	procedure RemoveSQLObjects;
212	>	procedure InternalClose(Force: Boolean);
213	>
214	>	protected
215	>	procedure DoConnect; override;
216	>	procedure DoDisconnect; override;
217	>	function GetConnected: Boolean; override;
218	>	procedure CheckStreamConnect;
219	>	procedure HandleException(Sender: TObject);
220	>	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
221	>	function GetDataset(Index : longint) : TDataset; override;
222	>	function GetDataSetCount : Longint; override;
223	>	procedure ReadState(Reader: TReader); override;
224	>	procedure SetConnected (Value : boolean); override;
225	>	public
226	>	constructor Create(AOwner: TComponent); override;
227	>	destructor Destroy; override;
228	>	procedure ApplyUpdates(const DataSets: array of TDataSet);
229	>	procedure CloseDataSets;
230	>	procedure CheckActive;
231	>	procedure CheckInactive;
232	>	procedure CreateDatabase;
233	>	procedure DropDatabase;
234	>	procedure ForceClose;
235	>	procedure GetFieldNames(const TableName: string; List: TStrings);
236	>	procedure GetTableNames(List: TStrings; SystemTables: Boolean = False);
237	>	function IndexOfDBConst(st: String): Integer;
238	>	function TestConnected: Boolean;
239	>	procedure CheckDatabaseName;
240	>	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
241	>	function AddTransaction(TR: TIBTransaction): Integer;
242	>	function FindTransaction(TR: TIBTransaction): Integer;
243	>	function FindDefaultTransaction(): TIBTransaction;
244	>	procedure RemoveTransaction(Idx: Integer);
245	>	procedure RemoveTransactions;
246	>	procedure SetHandle(Value: TISC_DB_HANDLE);
247	>
248	>	property Handle: TISC_DB_HANDLE read FHandle;
249	>	property IsReadOnly: Boolean read GetIsReadOnly;
250	>	property DBParamByDPB[const Idx: Integer]: String read GetDBParamByDPB
251	>	write SetDBParamByDPB;
252	>	property SQLObjectCount: Integer read GetSQLObjectCount;
253	>	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
254	>	property HandleIsShared: Boolean read FHandleIsShared;
255	>	property TransactionCount: Integer read GetTransactionCount;
256	>	property Transactions[Index: Integer]: TIBTransaction read GetTransaction;
257	>	property InternalTransaction: TIBTransaction read FInternalTransaction;
258	>
259	>	published
260	>	property Connected;
261	>	property AllowStreamedConnected: boolean read FAllowStreamedConnected
262	>	write FAllowStreamedConnected;
263	>	property DatabaseName: TIBFileName read FDBName write SetDatabaseName;
264	>	property Params: TStrings read FDBParams write SetDBParams;
265	>	property LoginPrompt default True;
266	>	property DefaultTransaction: TIBTransaction read FDefaultTransaction
267	>	write SetDefaultTransaction;
268	>	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer;
269	>	property SQLDialect : Integer read GetSQLDialect write SetSQLDialect default 3;
270	>	property SQLHourGlass: Boolean read FSQLHourGlass write FSQLHourGlass default true;
271	>	property DBSQLDialect : Integer read FDBSQLDialect;
272	>	property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
273	>	property AfterConnect;
274	>	property AfterDisconnect;
275	>	property BeforeConnect;
276	>	property BeforeDisconnect;
277	>	property OnLogin: TIBDatabaseLoginEvent read FOnLogin write FOnLogin;
278	>	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
279	>	property OnDialectDowngradeWarning: TNotifyEvent read FOnDialectDowngradeWarning write FOnDialectDowngradeWarning;
280	>	end;
281	>
282	>	{ TIBTransaction }
283	>
284	>	TTransactionAction         = (TARollback, TACommit, TARollbackRetaining, TACommitRetaining);
285	>
286	>	TIBTransaction = class(TComponent)
287	>	private
288	>	FAfterDelete: TNotifyEvent;
289	>	FAfterEdit: TNotifyEvent;
290	>	FAfterExecQuery: TNotifyEvent;
291	>	FAfterInsert: TNotifyEvent;
292	>	FAfterPost: TNotifyEvent;
293	>	FAfterTransactionEnd: TNotifyEvent;
294	>	FBeforeTransactionEnd: TNotifyEvent;
295	>	FIBLoaded: Boolean;
296	>	FCanTimeout         : Boolean;
297	>	FDatabases          : TList;
298	>	FOnStartTransaction: TNotifyEvent;
299	>	FSQLObjects         : TList;
300	>	FDefaultDatabase    : TIBDatabase;
301	>	FHandle             : TISC_TR_HANDLE;
302	>	FHandleIsShared     : Boolean;
303	>	FOnIdleTimer          : TNotifyEvent;
304	>	FStreamedActive     : Boolean;
305	>	FTPB                : PChar;
306	>	FTPBLength          : Short;
307	>	FTimer              : TFPTimer;
308	>	FDefaultAction      : TTransactionAction;
309	>	FTRParams           : TStrings;
310	>	FTRParamsChanged    : Boolean;
311	>	FInEndTransaction   : boolean;
312	>	FEndAction          : TTransactionAction;
313	>	procedure DoBeforeTransactionEnd;
314	>	procedure DoAfterTransactionEnd;
315	>	procedure DoOnStartTransaction;
316	>	procedure DoAfterExecQuery(Sender: TObject);
317	>	procedure DoAfterEdit(Sender: TObject);
318	>	procedure DoAfterDelete(Sender: TObject);
319	>	procedure DoAfterInsert(Sender: TObject);
320	>	procedure DoAfterPost(Sender: TObject);
321	>	procedure EnsureNotInTransaction;
322	>	procedure EndTransaction(Action: TTransactionAction; Force: Boolean);
323	>	function GetDatabase(Index: Integer): TIBDatabase;
324	>	function GetDatabaseCount: Integer;
325	>	function GetSQLObject(Index: Integer): TIBBase;
326	>	function GetSQLObjectCount: Integer;
327	>	function GetInTransaction: Boolean;
328	>	function GetIdleTimer: Integer;
329	>	procedure BeforeDatabaseDisconnect(DB: TIBDatabase);
330	>	procedure SetActive(Value: Boolean);
331	>	procedure SetDefaultAction(Value: TTransactionAction);
332	>	procedure SetDefaultDatabase(Value: TIBDatabase);
333	>	procedure SetIdleTimer(Value: Integer);
334	>	procedure SetTRParams(Value: TStrings);
335	>	procedure TimeoutTransaction(Sender: TObject);
336	>	procedure TRParamsChange(Sender: TObject);
337	>	procedure TRParamsChanging(Sender: TObject);
338	>	function AddSQLObject(ds: TIBBase): Integer;
339	>	procedure RemoveSQLObject(Idx: Integer);
340	>	procedure RemoveSQLObjects;
341	>
342	>	protected
343	>	procedure Loaded; override;
344	>	procedure SetHandle(Value: TISC_TR_HANDLE);
345	>	procedure Notification( AComponent: TComponent; Operation: TOperation); override;
346	>
347	>	public
348	>	constructor Create(AOwner: TComponent); override;
349	>	destructor Destroy; override;
350	>	function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
351	>	procedure Commit;
352	>	procedure CommitRetaining;
353	>	procedure Rollback;
354	>	procedure RollbackRetaining;
355	>	procedure StartTransaction;
356	>	procedure CheckInTransaction;
357	>	procedure CheckNotInTransaction;
358	>
359	>	function AddDatabase(db: TIBDatabase): Integer;
360	>	function FindDatabase(db: TIBDatabase): Integer;
361	>	function FindDefaultDatabase: TIBDatabase;
362	>	function GetEndAction: TTransactionAction;
363	>	procedure RemoveDatabase(Idx: Integer);
364	>	procedure RemoveDatabases;
365	>	procedure CheckDatabasesInList;
366	>
367	>	property DatabaseCount: Integer read GetDatabaseCount;
368	>	property Databases[Index: Integer]: TIBDatabase read GetDatabase;
369	>	property SQLObjectCount: Integer read GetSQLObjectCount;
370	>	property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
371	>	property Handle: TISC_TR_HANDLE read FHandle;
372	>	property HandleIsShared: Boolean read FHandleIsShared;
373	>	property InTransaction: Boolean read GetInTransaction;
374	>	property TPB: PChar read FTPB;
375	>	property TPBLength: Short read FTPBLength;
376	>	published
377	>	property Active: Boolean read GetInTransaction write SetActive;
378	>	property DefaultDatabase: TIBDatabase read FDefaultDatabase
379	>	write SetDefaultDatabase;
380	>	property IdleTimer: Integer read GetIdleTimer write SetIdleTimer default 0;
381	>	property DefaultAction: TTransactionAction read FDefaultAction write SetDefaultAction default taCommit;
382	>	property Params: TStrings read FTRParams write SetTRParams;
383	>	property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
384	>	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
385	>	write FBeforeTransactionEnd;
386	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
387	>	write FAfterTransactionEnd;
388	>	property OnStartTransaction: TNotifyEvent read FOnStartTransaction
389	>	write FOnStartTransaction;
390	>	property AfterExecQuery: TNotifyEvent read FAfterExecQuery
391	>	write FAfterExecQuery;
392	>	property AfterEdit: TNotifyEvent read FAfterEdit write FAfterEdit;
393	>	property AfterDelete: TNotifyEvent read FAfterDelete write FAfterDelete;
394	>	property AfterInsert: TNotifyEvent read FAfterInsert write FAfterInsert;
395	>	property AfterPost: TNotifyEvent read FAfterPost write FAfterPost;
396	>	end;
397	>
398	>	TTransactionEndEvent = procedure(Sender:TObject; Action: TTransactionAction) of object;
399	>	TBeforeDatabaseConnectEvent = procedure (Sender: TObject; DBParams: TStrings;
400	>	var DBName: string) of object;
401	>
402	>	{ TIBBase }
403	>
404	>	{ Virtually all components in IB are "descendents" of TIBBase.
405	>	It is to more easily manage the database and transaction
406	>	connections. }
407	>	TIBBase = class(TObject)
408	>	protected
409	>	FBeforeDatabaseConnect: TBeforeDatabaseConnectEvent;
410	>	FDatabase: TIBDatabase;
411	>	FIndexInDatabase: Integer;
412	>	FTransaction: TIBTransaction;
413	>	FIndexInTransaction: Integer;
414	>	FOwner: TObject;
415	>	FBeforeDatabaseDisconnect: TNotifyEvent;
416	>	FAfterDatabaseDisconnect: TNotifyEvent;
417	>	FAfterDatabaseConnect: TNotifyEvent;
418	>	FOnDatabaseFree: TNotifyEvent;
419	>	FBeforeTransactionEnd: TTransactionEndEvent;
420	>	FAfterTransactionEnd: TNotifyEvent;
421	>	FOnTransactionFree: TNotifyEvent;
422	>
423	>	procedure DoBeforeDatabaseConnect(DBParams: TStrings;
424	>	var DBName: string); virtual;
425	>	procedure DoAfterDatabaseConnect; virtual;
426	>	procedure DoBeforeDatabaseDisconnect; virtual;
427	>	procedure DoAfterDatabaseDisconnect; virtual;
428	>	procedure DoDatabaseFree; virtual;
429	>	procedure DoBeforeTransactionEnd(Action: TTransactionAction); virtual;
430	>	procedure DoAfterTransactionEnd; virtual;
431	>	procedure DoTransactionFree; virtual;
432	>	function GetDBHandle: PISC_DB_HANDLE; virtual;
433	>	function GetTRHandle: PISC_TR_HANDLE; virtual;
434	>	procedure SetDatabase(Value: TIBDatabase); virtual;
435	>	procedure SetTransaction(Value: TIBTransaction); virtual;
436	>	public
437	>	constructor Create(AOwner: TObject);
438	>	destructor Destroy; override;
439	>	procedure CheckDatabase; virtual;
440	>	procedure CheckTransaction; virtual;
441	>	procedure DoAfterExecQuery(Sender: TObject); virtual;
442	>	procedure DoAfterEdit(Sender: TObject); virtual;
443	>	procedure DoAfterDelete(Sender: TObject); virtual;
444	>	procedure DoAfterInsert(Sender: TObject); virtual;
445	>	procedure DoAfterPost(Sender: TObject); virtual;
446	>	function GetCharSetSize(CharSetID: integer): integer;
447	>	function GetDefaultCharSetSize: integer;
448	>	function GetCharSetName(CharSetID: integer): string;
449	>	function GetDefaultCharSetName: string;
450	>	procedure HandleException(Sender: TObject);
451	>	procedure SetCursor;
452	>	procedure RestoreCursor;
453	>	public
454	>	property BeforeDatabaseConnect: TBeforeDatabaseConnectEvent read FBeforeDatabaseConnect
455	>	write FBeforeDatabaseConnect;
456	>	property AfterDatabaseConnect: TNotifyEvent read FAfterDatabaseConnect
457	>	write FAfterDatabaseConnect;
458	>	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
459	>	write FBeforeDatabaseDisconnect;
460	>	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
461	>	write FAfterDatabaseDisconnect;
462	>	property OnDatabaseFree: TNotifyEvent read FOnDatabaseFree write FOnDatabaseFree;
463	>	property BeforeTransactionEnd: TTransactionEndEvent read FBeforeTransactionEnd write FBeforeTransactionEnd;
464	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd write FAfterTransactionEnd;
465	>	property OnTransactionFree: TNotifyEvent read FOnTransactionFree write FOnTransactionFree;
466	>	property Database: TIBDatabase read FDatabase
467	>	write SetDatabase;
468	>	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
469	>	property Owner: TObject read FOwner;
470	>	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
471	>	property Transaction: TIBTransaction read FTransaction
472	>	write SetTransaction;
473	>	end;
474	>
475	>	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
476	>	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
477	>
478	>
479	>	implementation
480	>
481	>	uses IBIntf, IBSQLMonitor, IBCustomDataSet, IBDatabaseInfo, IBSQL, IBUtils,
482	>	typInfo;
483	>
484	>	{ TIBDatabase }
485	>
486	>	constructor TIBDataBase.Create(AOwner: TComponent);
487	>	{$ifdef WINDOWS}
488	>	var acp: uint;
489	>	{$endif}
490	>	begin
491	>	inherited Create(AOwner);
492	>	FIBLoaded := False;
493	>	CheckIBLoaded;
494	>	FIBLoaded := True;
495	>	LoginPrompt := True;
496	>	FSQLObjects := TList.Create;
497	>	FTransactions := TList.Create;
498	>	FDBName := '';
499	>	FDBParams := TStringList.Create;
500	>	FSQLHourGlass := true;
501	>	if (AOwner <> nil) and
502	>	(AOwner is TCustomApplication) and
503	>	TCustomApplication(AOWner).ConsoleApplication then
504	>	LoginPrompt := false;
505	>	{$ifdef UNIX}
506	>	if csDesigning in ComponentState then
507	>	FDBParams.Add('lc_ctype=UTF8');
508	>	{$else}
509	>	{$ifdef WINDOWS}
510	>	if csDesigning in ComponentState then
511	>	begin
512	>	acp := GetACP;
513	>	if (acp >= 1250) and (acp <= 1254) then
514	>	FDBParams.Values['lc_ctype'] := Format('WIN%d',[acp]);
515	>	end;
516	>	{$endif}
517	>	{$endif}
518	>	FDBParamsChanged := True;
519	>	TStringList(FDBParams).OnChange := DBParamsChange;
520	>	TStringList(FDBParams).OnChanging := DBParamsChanging;
521	>	FDPB := nil;
522	>	FHandle := nil;
523	>	FUserNames := nil;
524	>	FInternalTransaction := TIBTransaction.Create(self);
525	>	FInternalTransaction.DefaultDatabase := Self;
526	>	FTimer := TFPTimer.Create(Self);
527	>	FTimer.Enabled := False;
528	>	FTimer.Interval := 0;
529	>	FTimer.OnTimer := TimeoutConnection;
530	>	FDBSQLDialect := 1;
531	>	FSQLDialect := 3;
532	>	FTraceFlags := [];
533	>	FDataSets := TList.Create;
534	>	CheckStreamConnect;
535	>	end;
536	>
537	>	destructor TIBDataBase.Destroy;
538	>	var
539	>	i: Integer;
540	>	begin
541	>	if FIBLoaded then
542	>	begin
543	>	IdleTimer := 0;
544	>	if FHandle <> nil then
545	>	ForceClose;
546	>	for i := 0 to FSQLObjects.Count - 1 do
547	>	if FSQLObjects[i] <> nil then
548	>	SQLObjects[i].DoDatabaseFree;
549	>	RemoveSQLObjects;
550	>	RemoveTransactions;
551	>	FInternalTransaction.Free;
552	>	FreeMem(FDPB);
553	>	FDPB := nil;
554	>	FDBParams.Free;
555	>	FSQLObjects.Free;
556	>	FUserNames.Free;
557	>	FTransactions.Free;
558	>	end;
559	>	FDataSets.Free;
560	>	inherited Destroy;
561	>	end;
562	>
563	>	function TIBDataBase.Call(ErrCode: ISC_STATUS; RaiseError: Boolean
564	>	): ISC_STATUS;
565	>	begin
566	>	result := ErrCode;
567	>	FCanTimeout := False;
568	>	if RaiseError and (ErrCode > 0) then
569	>	IBDataBaseError;
570	>	end;
571	>
572	>	procedure TIBDataBase.CheckActive;
573	>	begin
574	>	if StreamedConnected and (not Connected) then
575	>	Loaded;
576	>	if FHandle = nil then
577	>	IBError(ibxeDatabaseClosed, [nil]);
578	>	end;
579	>
580	>	procedure TIBDataBase.EnsureInactive;
581	>	begin
582	>	if csDesigning in ComponentState then
583	>	begin
584	>	if FHandle <> nil then
585	>	Close;
586	>	end
587	>	end;
588	>
589	>	procedure TIBDataBase.CheckInactive;
590	>	begin
591	>	if FHandle <> nil then
592	>	IBError(ibxeDatabaseOpen, [nil]);
593	>	end;
594	>
595	>	procedure TIBDataBase.CheckDatabaseName;
596	>	begin
597	>	if (Trim(FDBName) = '') then
598	>	IBError(ibxeDatabaseNameMissing, [nil]);
599	>	end;
600	>
601	>	function TIBDataBase.AddSQLObject(ds: TIBBase): Integer;
602	>	begin
603	>	result := 0;
604	>	if (ds.Owner is TIBCustomDataSet) then
605	>	FDataSets.Add(ds.Owner);
606	>	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
607	>	Inc(result);
608	>	if (result = FSQLObjects.Count) then
609	>	FSQLObjects.Add(ds)
610	>	else
611	>	FSQLObjects[result] := ds;
612	>	end;
613	>
614	>	function TIBDataBase.AddTransaction(TR: TIBTransaction): Integer;
615	>	begin
616	>	result := FindTransaction(TR);
617	>	if result <> -1 then
618	>	begin
619	>	result := -1;
620	>	exit;
621	>	end;
622	>	result := 0;
623	>	while (result < FTransactions.Count) and (FTransactions[result] <> nil) do
624	>	Inc(result);
625	>	if (result = FTransactions.Count) then
626	>	FTransactions.Add(TR)
627	>	else
628	>	FTransactions[result] := TR;
629	>	end;
630	>
631	>	procedure TIBDataBase.DoDisconnect;
632	>	begin
633	>	if Connected then
634	>	InternalClose(False);
635	>	FDBSQLDialect := 1;
636	>	SetLength(FCharSetSizes,0);
637	>	SetLength(FCharSetNames,0);
638	>	end;
639	>
640	>	procedure TIBDataBase.CreateDatabase;
641	>	var
642	>	tr_handle: TISC_TR_HANDLE;
643	>	begin
644	>	CheckInactive;
645	>	tr_handle := nil;
646	>	Call(
647	>	isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0,
648	>	PChar('CREATE DATABASE ''' + FDBName + ''' ' + {do not localize}
649	>	Params.Text), SQLDialect, nil),
650	>	True);
651	>	end;
652	>
653	>	procedure TIBDataBase.DropDatabase;
654	>	begin
655	>	CheckActive;
656	>	Call(isc_drop_database(StatusVector, @FHandle), True);
657	>	end;
658	>
659	>	procedure TIBDataBase.DBParamsChange(Sender: TObject);
660	>	begin
661	>	FDBParamsChanged := True;
662	>	end;
663	>
664	>	procedure TIBDataBase.DBParamsChanging(Sender: TObject);
665	>	begin
666	>	EnsureInactive;
667	>	CheckInactive;
668	>	end;
669	>
670	>	function TIBDataBase.FindTransaction(TR: TIBTransaction): Integer;
671	>	var
672	>	i: Integer;
673	>	begin
674	>	result := -1;
675	>	for i := 0 to FTransactions.Count - 1 do
676	>	if TR = Transactions[i] then
677	>	begin
678	>	result := i;
679	>	break;
680	>	end;
681	>	end;
682	>
683	>	function TIBDataBase.FindDefaultTransaction: TIBTransaction;
684	>	var
685	>	i: Integer;
686	>	begin
687	>	result := FDefaultTransaction;
688	>	if result = nil then
689	>	begin
690	>	for i := 0 to FTransactions.Count - 1 do
691	>	if (Transactions[i] <> nil) and
692	>	(TIBTransaction(Transactions[i]).DefaultDatabase = self) and
693	>	(TIBTransaction(Transactions[i]) <> FInternalTransaction) then
694	>	begin
695	>	result := TIBTransaction(Transactions[i]);
696	>	break;
697	>	end;
698	>	end;
699	>	end;
700	>
701	>	procedure TIBDataBase.ForceClose;
702	>	begin
703	>	if Connected then
704	>	InternalClose(True);
705	>	end;
706	>
707	>	function TIBDataBase.GetConnected: Boolean;
708	>	begin
709	>	result := FHandle <> nil;
710	>	end;
711	>
712	>	function TIBDataBase.GetSQLObject(Index: Integer): TIBBase;
713	>	begin
714	>	result := FSQLObjects[Index];
715	>	end;
716	>
717	>	function TIBDataBase.GetSQLObjectCount: Integer;
718	>	var
719	>	i: Integer;
720	>	begin
721	>	result := 0;
722	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
723	>	Inc(result);
724	>	end;
725	>
726	>	function TIBDataBase.GetDBParamByDPB( const Idx: Integer): String;
727	>	var
728	>	ConstIdx, EqualsIdx: Integer;
729	>	begin
730	>	if (Idx > 0) and (Idx <= isc_dpb_last_dpb_constant) then
731	>	begin
732	>	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
733	>	if ConstIdx = -1 then
734	>	result := ''
735	>	else
736	>	begin
737	>	result := Params[ConstIdx];
738	>	EqualsIdx := Pos('=', result); {mbcs ok}
739	>	if EqualsIdx = 0 then
740	>	result := ''
741	>	else
742	>	result := Copy(result, EqualsIdx + 1, Length(result));
743	>	end;
744	>	end
745	>	else
746	>	result := '';
747	>	end;
748	>
749	>	function TIBDataBase.GetIdleTimer: Integer;
750	>	begin
751	>	result := FTimer.Interval;
752	>	end;
753	>
754	>	function TIBDataBase.GetTransaction(Index: Integer): TIBTransaction;
755	>	begin
756	>	result := FTransactions[Index];
757	>	end;
758	>
759	>	function TIBDataBase.GetTransactionCount: Integer;
760	>	var
761	>	i: Integer;
762	>	begin
763	>	result := 0;
764	>	for i := 0 to FTransactions.Count - 1 do
765	>	if FTransactions[i] <> nil then
766	>	Inc(result);
767	>	end;
768	>
769	>	function TIBDataBase.IndexOfDBConst(st: String): Integer;
770	>	var
771	>	i, pos_of_str: Integer;
772	>	begin
773	>	result := -1;
774	>	for i := 0 to Params.Count - 1 do
775	>	begin
776	>	pos_of_str := Pos(st, AnsiLowerCase(Params[i])); {mbcs ok}
777	>	if (pos_of_str = 1) or (pos_of_str = Length(DPBPrefix) + 1) then
778	>	begin
779	>	result := i;
780	>	break;
781	>	end;
782	>	end;
783	>	end;
784	>
785	>	procedure TIBDataBase.InternalClose(Force: Boolean);
786	>	var
787	>	i: Integer;
788	>	begin
789	>	CheckActive;
790	>	{ Tell all connected transactions that we're disconnecting.
791	>	This is so transactions can commit/rollback, accordingly
792	>	}
793	>	for i := 0 to FTransactions.Count - 1 do
794	>	begin
795	>	try
796	>	if FTransactions[i] <> nil then
797	>	Transactions[i].BeforeDatabaseDisconnect(Self);
798	>	except
799	>	if not Force then
800	>	raise;
801	>	end;
802	>	end;
803	>	for i := 0 to FSQLObjects.Count - 1 do
804	>	begin
805	>	try
806	>	if FSQLObjects[i] <> nil then
807	>	SQLObjects[i].DoBeforeDatabaseDisconnect;
808	>	except
809	>	if not Force then
810	>	raise;
811	>	end;
812	>	end;
813	>
814	>	if (not HandleIsShared) and
815	>	(Call(isc_detach_database(StatusVector, @FHandle), False) > 0) and
816	>	(not Force) then
817	>	IBDataBaseError
818	>	else
819	>	begin
820	>	FHandle := nil;
821	>	FHandleIsShared := False;
822	>	end;
823	>
824	>	if not (csDesigning in ComponentState) then
825	>	MonitorHook.DBDisconnect(Self);
826	>
827	>	for i := 0 to FSQLObjects.Count - 1 do
828	>	if FSQLObjects[i] <> nil then
829	>	SQLObjects[i].DoAfterDatabaseDisconnect;
830	>	end;
831	>
832	>	procedure TIBDataBase.LoadCharSetInfo;
833	>	var Query: TIBSQL;
834	>	i: integer;
835	>	begin
836	>	if not FInternalTransaction.Active then
837	>	FInternalTransaction.StartTransaction;
838	>	Query := TIBSQL.Create(self);
839	>	try
840	>	Query.Database := Self;
841	>	Query.Transaction := FInternalTransaction;
842	>	Query.SQL.Text := 'Select RDB$CHARACTER_SET_ID, RDB$BYTES_PER_CHARACTER, RDB$CHARACTER_SET_NAME ' +
843	>	'From RDB$CHARACTER_SETS Order by 1 DESC'; {do not localize}
844	>	Query.Prepare;
845	>	Query.ExecQuery;
846	>	if not Query.EOF then
847	>	begin
848	>	SetLength(FCharSetSizes,Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger + 1);
849	>	SetLength(FCharSetNames,Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger + 1);
850	>	for i := 0 to Length(FCharSetSizes) - 1 do FCharSetSizes[i] := 1;
851	>	repeat
852	>	FCharSetSizes[Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger] :=
853	>	Query.FieldByName('RDB$BYTES_PER_CHARACTER').AsInteger;
854	>	FCharSetNames[Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger] :=
855	>	Query.FieldByName('RDB$CHARACTER_SET_NAME').AsString;
856	>	Query.Next;
857	>	until Query.EOF;
858	>	end;
859	>	finally
860	>	Query.free;
861	>	FInternalTransaction.Commit;
862	>	end;
863	>	end;
864	>
865	>	procedure TIBDataBase.CheckStreamConnect;
866	>	var
867	>	i: integer;
868	>	begin
869	>	try
870	>	if not (csDesigning in ComponentState) and StreamedConnected and (not Connected) then
871	>	begin
872	>	for i := 0 to FTransactions.Count - 1 do
873	>	if  FTransactions[i] <> nil then
874	>	begin
875	>	with TIBTransaction(FTransactions[i]) do
876	>	if not Active then
877	>	if FStreamedActive and not InTransaction then
878	>	begin
879	>	StartTransaction;
880	>	FStreamedActive := False;
881	>	end;
882	>	end;
883	>	if (FDefaultTransaction <> nil) and
884	>	(FDefaultTransaction.FStreamedActive) and
885	>	(not FDefaultTransaction.InTransaction) then
886	>	FDefaultTransaction.StartTransaction;
887	>	FStreamedConnected := False;
888	>	end;
889	>	except
890	>	if csDesigning in ComponentState then
891	>	HandleException(Self)
892	>	else
893	>	raise;
894	>	end;
895	>	end;
896	>
897	>	procedure TIBDataBase.HandleException(Sender: TObject);
898	>	var aParent: TComponent;
899	>	begin
900	>	aParent := Owner;
901	>	while aParent <> nil do
902	>	begin
903	>	if aParent is TCustomApplication then
904	>	begin
905	>	TCustomApplication(aParent).HandleException(Sender);
906	>	Exit;
907	>	end;
908	>	aParent := aParent.Owner;
909	>	end;
910	>	SysUtils.ShowException(ExceptObject,ExceptAddr);
911	>	end;
912	>
913	>	procedure TIBDataBase.Notification(AComponent: TComponent;
914	>	Operation: TOperation);
915	>	var
916	>	i: Integer;
917	>	begin
918	>	inherited Notification( AComponent, Operation);
919	>	if (Operation = opRemove) and (AComponent = FDefaultTransaction) then
920	>	begin
921	>	i := FindTransaction(FDefaultTransaction);
922	>	if (i <> -1) then
923	>	RemoveTransaction(i);
924	>	FDefaultTransaction := nil;
925	>	end;
926	>	end;
927	>
928	>	function TIBDataBase.Login: Boolean;
929	>	var
930	>	IndexOfUser, IndexOfPassword: Integer;
931	>	Username, Password, OldPassword: String;
932	>	LoginParams: TStrings;
933	>
934	>	procedure HidePassword;
935	>	var
936	>	I: Integer;
937	>	IndexAt: Integer;
938	>	begin
939	>	IndexAt := 0;
940	>	for I := 0 to Params.Count -1 do
941	>	if Pos('password', LowerCase(Trim(Params.Names[i]))) = 1 then {mbcs ok}
942	>	begin
943	>	FHiddenPassword := Params.Values[Params.Names[i]];
944	>	IndexAt := I;
945	>	break;
946	>	end;
947	>	if IndexAt <> 0 then
948	>	Params.Delete(IndexAt);
949	>	end;
950	>
951	>	begin
952	>	Result := false;
953	>	if FLoginCalled then Exit;
954	>	FLoginCalled := true;
955	>	try
956	>	if Assigned(FOnLogin) and not (csDesigning in ComponentState) then
957	>	begin
958	>	result := True;
959	>	LoginParams := TStringList.Create;
960	>	try
961	>	LoginParams.Assign(Params);
962	>	FOnLogin(Self, LoginParams);
963	>	Params.Assign (LoginParams);
964	>	HidePassword;
965	>	finally
966	>	LoginParams.Free;
967	>	end;
968	>	end
969	>	else
970	>	if assigned(IBGUIInterface) then
971	>	begin
972	>	IndexOfUser := IndexOfDBConst(DPBConstantNames[isc_dpb_user_name]);
973	>	if IndexOfUser <> -1 then
974	>	Username := Copy(Params[IndexOfUser],
975	>	Pos('=', Params[IndexOfUser]) + 1, {mbcs ok}
976	>	Length(Params[IndexOfUser]));
977	>	IndexOfPassword := IndexOfDBConst(DPBConstantNames[isc_dpb_password]);
978	>	if IndexOfPassword <> -1 then
979	>	begin
980	>	Password := Copy(Params[IndexOfPassword],
981	>	Pos('=', Params[IndexOfPassword]) + 1, {mbcs ok}
982	>	Length(Params[IndexOfPassword]));
983	>	OldPassword := password;
984	>	end;
985	>	result := IBGUIInterface.LoginDialogEx(DatabaseName, Username, Password, False);
986	>	if result then
987	>	begin
988	>	if IndexOfUser = -1 then
989	>	Params.Add(DPBConstantNames[isc_dpb_user_name] + '=' + Username)
990	>	else
991	>	Params[IndexOfUser] := DPBConstantNames[isc_dpb_user_name] +
992	>	'=' + Username;
993	>	if (Password = OldPassword) then
994	>	FHiddenPassword := ''
995	>	else
996	>	begin
997	>	FHiddenPassword := Password;
998	>	if OldPassword <> '' then
999	>	HidePassword;
1000	>	end;
1001	>	end;
1002	>	end
1003	>	else
1004	>	if LoginPrompt then
1005	>	IBError(ibxeNoLoginDialog,[]);
1006	>	finally
1007	>	FLoginCalled := false
1008	>	end;
1009	>	end;
1010	>
1011	>	procedure TIBDataBase.DoConnect;
1012	>	var
1013	>	DPB: String;
1014	>	TempDBParams: TStrings;
1015	>	I: integer;
1016	>	aDBName: string;
1017	>
1018	>	{Call error analysis}
1019	>	sqlcode: Long;
1020	>	IBErrorCode: Long;
1021	>	status_vector: PISC_STATUS;
1022	>	begin
1023	>	CheckInactive;
1024	>	CheckDatabaseName;
1025	>	if (not LoginPrompt) and (FHiddenPassword <> '') then
1026	>	begin
1027	>	FHiddenPassword := '';
1028	>	FDBParamsChanged := True;
1029	>	end;
1030	>	{ Use builtin login prompt if requested }
1031	>	if (LoginPrompt or (csDesigning in ComponentState)) and not Login then
1032	>	IBError(ibxeOperationCancelled, [nil]);
1033	>
1034	>	TempDBParams := TStringList.Create;
1035	>	try
1036	>	TempDBParams.Assign(FDBParams);
1037	>	aDBName := FDBName;
1038	>	{Opportunity to override defaults}
1039	>	for i := 0 to FSQLObjects.Count - 1 do
1040	>	begin
1041	>	if FSQLObjects[i] <> nil then
1042	>	SQLObjects[i].DoBeforeDatabaseConnect(TempDBParams,aDBName);
1043	>	end;
1044	>
1045	>	{ Generate a new DPB if necessary }
1046	>	if (FDBParamsChanged or (TempDBParams.Text <> FDBParams.Text)) then
1047	>	begin
1048	>	FDBParamsChanged := False;
1049	>	if (not LoginPrompt and not (csDesigning in ComponentState)) or (FHiddenPassword = '') then
1050	>	GenerateDPB(TempDBParams, DPB, FDPBLength)
1051	>	else
1052	>	begin
1053	>	TempDBParams.Add('password=' + FHiddenPassword);
1054	>	GenerateDPB(TempDBParams, DPB, FDPBLength);
1055	>	end;
1056	>	IBAlloc(FDPB, 0, FDPBLength);
1057	>	Move(DPB[1], FDPB[0], FDPBLength);
1058	>	end;
1059	>	finally
1060	>	TempDBParams.Free;
1061	>	end;
1062	>	repeat
1063	>	if Call(isc_attach_database(StatusVector, Length(aDBName),
1064	>	PChar(aDBName), @FHandle,
1065	>	FDPBLength, FDPB), False) > 0 then
1066	>	begin
1067	>	{$IFDEF UNIX}
1068	>	if IsEmbeddedServer and (Pos(':',aDBName) = 0) then
1069	>	begin
1070	>	status_vector := StatusVector;
1071	>	IBErrorCode := StatusVectorArray[1];
1072	>	sqlcode := isc_sqlcode(StatusVector);
1073	>
1074	>	if ((sqlcode = -901) and (IBErrorCode = 335544382)) {Access permissions on firebird temp}
1075	>	or
1076	>	((sqlcode = -902) and (IBErrorCode = 335544373)) {Security DB Problem}
1077	>	then
1078	>	begin
1079	>	aDBName := 'localhost:' + aDBName;
1080	>	Continue;
1081	>	end;
1082	>	end;
1083	>	{$ENDIF}
1084	>	FHandle := nil;
1085	>	IBDataBaseError;
1086	>	end;
1087	>	until FHandle <> nil;
1088	>	if not (csDesigning in ComponentState) then
1089	>	FDBName := aDBName; {Synchronise at run time}
1090	>	FDBSQLDialect := GetDBSQLDialect;
1091	>	ValidateClientSQLDialect;
1092	>	for i := 0 to FSQLObjects.Count - 1 do
1093	>	begin
1094	>	if FSQLObjects[i] <> nil then
1095	>	SQLObjects[i].DoAfterDatabaseConnect;
1096	>	end;
1097	>	if not (csDesigning in ComponentState) then
1098	>	MonitorHook.DBConnect(Self);
1099	>	LoadCharSetInfo;
1100	>	end;
1101	>
1102	>	procedure TIBDataBase.RemoveSQLObject(Idx: Integer);
1103	>	var
1104	>	ds: TIBBase;
1105	>	begin
1106	>	if (Idx >= 0) and (FSQLObjects[Idx] <> nil) then
1107	>	begin
1108	>	ds := SQLObjects[Idx];
1109	>	FSQLObjects[Idx] := nil;
1110	>	ds.Database := nil;
1111	>	if (ds.owner is TDataSet) then
1112	>	FDataSets.Remove(TDataSet(ds.Owner));
1113	>	end;
1114	>	end;
1115	>
1116	>	procedure TIBDataBase.RemoveSQLObjects;
1117	>	var
1118	>	i: Integer;
1119	>	begin
1120	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1121	>	begin
1122	>	RemoveSQLObject(i);
1123	>	if (TIBBase(FSQLObjects[i]).owner is TDataSet) then
1124	>	FDataSets.Remove(TDataSet(TIBBase(FSQLObjects[i]).owner));
1125	>	end;
1126	>	end;
1127	>
1128	>	procedure TIBDataBase.RemoveTransaction(Idx: Integer);
1129	>	var
1130	>	TR: TIBTransaction;
1131	>	begin
1132	>	if ((Idx >= 0) and (FTransactions[Idx] <> nil)) then
1133	>	begin
1134	>	TR := Transactions[Idx];
1135	>	FTransactions[Idx] := nil;
1136	>	TR.RemoveDatabase(TR.FindDatabase(Self));
1137	>	if TR = FDefaultTransaction then
1138	>	FDefaultTransaction := nil;
1139	>	end;
1140	>	end;
1141	>
1142	>	procedure TIBDataBase.RemoveTransactions;
1143	>	var
1144	>	i: Integer;
1145	>	begin
1146	>	for i := 0 to FTransactions.Count - 1 do if FTransactions[i] <> nil then
1147	>	RemoveTransaction(i);
1148	>	end;
1149	>
1150	>	procedure TIBDataBase.SetDatabaseName( const Value: TIBFileName);
1151	>	begin
1152	>	if FDBName <> Value then
1153	>	begin
1154	>	EnsureInactive;
1155	>	CheckInactive;
1156	>	FDBName := Value;
1157	>	end;
1158	>	end;
1159	>
1160	>	procedure TIBDataBase.SetDBParamByDPB( const Idx: Integer; Value: String);
1161	>	var
1162	>	ConstIdx: Integer;
1163	>	begin
1164	>	ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
1165	>	if (Value = '') then
1166	>	begin
1167	>	if ConstIdx <> -1 then
1168	>	Params.Delete(ConstIdx);
1169	>	end
1170	>	else
1171	>	begin
1172	>	if (ConstIdx = -1) then
1173	>	Params.Add(DPBConstantNames[Idx] + '=' + Value)
1174	>	else
1175	>	Params[ConstIdx] := DPBConstantNames[Idx] + '=' + Value;
1176	>	end;
1177	>	end;
1178	>
1179	>	procedure TIBDataBase.SetDBParams(Value: TStrings);
1180	>	begin
1181	>	FDBParams.Assign(Value);
1182	>	end;
1183	>
1184	>	procedure TIBDataBase.SetDefaultTransaction(Value: TIBTransaction);
1185	>	var
1186	>	i: Integer;
1187	>	begin
1188	>	if (FDefaultTransaction <> nil) and (FDefaultTransaction <> Value) then
1189	>	begin
1190	>	i := FindTransaction(FDefaultTransaction);
1191	>	if (i <> -1) and (FDefaultTransaction.DefaultDatabase <> self) then
1192	>	RemoveTransaction(i);
1193	>	end;
1194	>	if (Value <> nil) and (FDefaultTransaction <> Value) then
1195	>	begin
1196	>	Value.AddDatabase(Self);
1197	>	AddTransaction(Value);
1198	>	end;
1199	>	FDefaultTransaction := Value;
1200	>	end;
1201	>
1202	>	procedure TIBDataBase.SetHandle(Value: TISC_DB_HANDLE);
1203	>	begin
1204	>	if HandleIsShared then
1205	>	Close
1206	>	else
1207	>	CheckInactive;
1208	>	FHandle := Value;
1209	>	FHandleIsShared := (Value <> nil);
1210	>	end;
1211	>
1212	>	procedure TIBDataBase.SetIdleTimer(Value: Integer);
1213	>	begin
1214	>	if Value < 0 then
1215	>	IBError(ibxeTimeoutNegative, [nil])
1216	>	else
1217	>	if (Value = 0) then
1218	>	begin
1219	>	FTimer.Enabled := False;
1220	>	FTimer.Interval := 0;
1221	>	end
1222	>	else
1223	>	if (Value > 0) then
1224	>	begin
1225	>	FTimer.Interval := Value;
1226	>	if not (csDesigning in ComponentState) then
1227	>	FTimer.Enabled := True;
1228	>	end;
1229	>	end;
1230	>
1231	>	function TIBDataBase.TestConnected: Boolean;
1232	>	var
1233	>	DatabaseInfo: TIBDatabaseInfo;
1234	>	begin
1235	>	result := Connected;
1236	>	if result then
1237	>	begin
1238	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1239	>	try
1240	>	DatabaseInfo.Database := self;
1241	>	{ poke the server to see if connected }
1242	>	if DatabaseInfo.BaseLevel = 0 then ;
1243	>	DatabaseInfo.Free;
1244	>	except
1245	>	ForceClose;
1246	>	result := False;
1247	>	DatabaseInfo.Free;
1248	>	end;
1249	>	end;
1250	>	end;
1251	>
1252	>	procedure TIBDataBase.TimeoutConnection(Sender: TObject);
1253	>	begin
1254	>	if Connected then
1255	>	begin
1256	>	if FCanTimeout then
1257	>	begin
1258	>	ForceClose;
1259	>	if Assigned(FOnIdleTimer) then
1260	>	FOnIdleTimer(Self);
1261	>	end
1262	>	else
1263	>	FCanTimeout := True;
1264	>	end;
1265	>	end;
1266	>
1267	>	function TIBDataBase.GetIsReadOnly: Boolean;
1268	>	var
1269	>	DatabaseInfo: TIBDatabaseInfo;
1270	>	begin
1271	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1272	>	DatabaseInfo.Database := self;
1273	>	if (DatabaseInfo.ODSMajorVersion < 10) then
1274	>	result := false
1275	>	else
1276	>	begin
1277	>	if (DatabaseInfo.ReadOnly = 0) then
1278	>	result := false
1279	>	else
1280	>	result := true;
1281	>	end;
1282	>	DatabaseInfo.Free;
1283	>	end;
1284	>
1285	>	function TIBDataBase.GetSQLDialect: Integer;
1286	>	begin
1287	>	Result := FSQLDialect;
1288	>	end;
1289	>
1290	>
1291	>	procedure TIBDataBase.SetSQLDialect( const Value: Integer);
1292	>	begin
1293	>	if (Value < 1) then IBError(ibxeSQLDialectInvalid, [nil]);
1294	>	if ((FHandle = nil) or (Value <= FDBSQLDialect))  then
1295	>	FSQLDialect := Value
1296	>	else
1297	>	IBError(ibxeSQLDialectInvalid, [nil]);
1298	>	end;
1299	>
1300	>	function TIBDataBase.GetDBSQLDialect: Integer;
1301	>	var
1302	>	DatabaseInfo: TIBDatabaseInfo;
1303	>	begin
1304	>	DatabaseInfo := TIBDatabaseInfo.Create(self);
1305	>	DatabaseInfo.Database := self;
1306	>	result := DatabaseInfo.DBSQLDialect;
1307	>	DatabaseInfo.Free;
1308	>	end;
1309	>
1310	>	procedure TIBDataBase.ValidateClientSQLDialect;
1311	>	begin
1312	>	if (FDBSQLDialect < FSQLDialect) then
1313	>	begin
1314	>	FSQLDialect := FDBSQLDialect;
1315	>	if Assigned (FOnDialectDowngradeWarning) then
1316	>	FOnDialectDowngradeWarning(self);
1317	>	end;
1318	>	end;
1319	>
1320	>	procedure TIBDataBase.ApplyUpdates( const DataSets: array of TDataSet);
1321	>	var
1322	>	I: Integer;
1323	>	DS: TIBCustomDataSet;
1324	>	TR: TIBTransaction;
1325	>	begin
1326	>	TR := nil;
1327	>	for I := 0 to High(DataSets) do
1328	>	begin
1329	>	DS := TIBCustomDataSet(DataSets[I]);
1330	>	if DS.Database <> Self then
1331	>	IBError(ibxeUpdateWrongDB, [nil]);
1332	>	if TR = nil then
1333	>	TR := DS.Transaction;
1334	>	if (DS.Transaction <> TR) or (TR = nil) then
1335	>	IBError(ibxeUpdateWrongTR, [nil]);
1336	>	end;
1337	>	TR.CheckInTransaction;
1338	>	for I := 0 to High(DataSets) do
1339	>	begin
1340	>	DS := TIBCustomDataSet(DataSets[I]);
1341	>	DS.ApplyUpdates;
1342	>	end;
1343	>	TR.CommitRetaining;
1344	>	end;
1345	>
1346	>	procedure TIBDataBase.CloseDataSets;
1347	>	var
1348	>	i: Integer;
1349	>	begin
1350	>	for i := 0 to DataSetCount - 1 do
1351	>	if (DataSets[i] <> nil) then
1352	>	DataSets[i].close;
1353	>	end;
1354	>
1355	>	function TIBDataBase.GetDataset(Index: longint): TDataset;
1356	>	begin
1357	>	if (Index >= 0) and (Index < FDataSets.Count) then
1358	>	Result := TDataSet(FDataSets[Index])
1359	>	else
1360	>	raise Exception.Create('Invalid Index to DataSets');
1361	>	end;
1362	>
1363	>	function TIBDataBase.GetDataSetCount: Longint;
1364	>	begin
1365	>	Result := FDataSets.Count;
1366	>	end;
1367	>
1368	>	procedure TIBDataBase.ReadState(Reader: TReader);
1369	>	begin
1370	>	FDBParams.Clear;
1371	>	inherited ReadState(Reader);
1372	>	end;
1373	>
1374	>	procedure TIBDataBase.SetConnected(Value: boolean);
1375	>	begin
1376	>	if StreamedConnected and not AllowStreamedConnected then
1377	>	begin
1378	>	StreamedConnected := false;
1379	>	Value := false
1380	>	end;
1381	>	inherited SetConnected(Value);
1382	>	end;
1383	>
1384	>	procedure TIBDataBase.GetFieldNames( const TableName: string; List: TStrings);
1385	>	var
1386	>	Query: TIBSQL;
1387	>	begin
1388	>	if TableName = '' then
1389	>	IBError(ibxeNoTableName, [nil]);
1390	>	if not Connected then
1391	>	Open;
1392	>	if not FInternalTransaction.Active then
1393	>	FInternalTransaction.StartTransaction;
1394	>	Query := TIBSQL.Create(self);
1395	>	try
1396	>	Query.GoToFirstRecordOnExecute := False;
1397	>	Query.Database := Self;
1398	>	Query.Transaction := FInternalTransaction;
1399	>	Query.SQL.Text := 'Select R.RDB$FIELD_NAME ' + {do not localize}
1400	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
1401	>	'where R.RDB$RELATION_NAME = ' + {do not localize}
1402	>	'''' +
1403	>	FormatIdentifierValue(SQLDialect, TableName) +
1404	>	''' ' +
1405	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '; {do not localize}
1406	>	Query.Prepare;
1407	>	Query.ExecQuery;
1408	>	with List do
1409	>	begin
1410	>	BeginUpdate;
1411	>	try
1412	>	Clear;
1413	>	while (not Query.EOF) and (Query.Next <> nil) do
1414	>	List.Add(TrimRight(Query.Current.ByName('RDB$FIELD_NAME').AsString)); {do not localize}
1415	>	finally
1416	>	EndUpdate;
1417	>	end;
1418	>	end;
1419	>	finally
1420	>	Query.free;
1421	>	FInternalTransaction.Commit;
1422	>	end;
1423	>	end;
1424	>
1425	>	procedure TIBDataBase.GetTableNames(List: TStrings; SystemTables: Boolean);
1426	>	var
1427	>	Query : TIBSQL;
1428	>	begin
1429	>	if not (csReading in ComponentState) then
1430	>	begin
1431	>	if not Connected then
1432	>	Open;
1433	>	if not FInternalTransaction.Active then
1434	>	FInternalTransaction.StartTransaction;
1435	>	Query := TIBSQL.Create(self);
1436	>	try
1437	>	Query.GoToFirstRecordOnExecute := False;
1438	>	Query.Database := Self;
1439	>	Query.Transaction := FInternalTransaction;
1440	>	if SystemTables then
1441	>	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1442	>	' where RDB$VIEW_BLR is NULL' {do not localize}
1443	>	else
1444	>	Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
1445	>	' where RDB$VIEW_BLR is NULL and RDB$SYSTEM_FLAG = 0'; {do not localize}
1446	>	Query.Prepare;
1447	>	Query.ExecQuery;
1448	>	with List do
1449	>	begin
1450	>	BeginUpdate;
1451	>	try
1452	>	Clear;
1453	>	while (not Query.EOF) and (Query.Next <> nil) do
1454	>	List.Add(TrimRight(Query.Current[0].AsString));
1455	>	finally
1456	>	EndUpdate;
1457	>	end;
1458	>	end;
1459	>	finally
1460	>	Query.Free;
1461	>	FInternalTransaction.Commit;
1462	>	end;
1463	>	end;
1464	>	end;
1465	>
1466	>	{ TIBTransaction }
1467	>
1468	>	constructor TIBTransaction.Create(AOwner: TComponent);
1469	>	begin
1470	>	inherited Create(AOwner);
1471	>	FIBLoaded := False;
1472	>	CheckIBLoaded;
1473	>	FIBLoaded := True;
1474	>	CheckIBLoaded;
1475	>	FDatabases := TList.Create;
1476	>	FSQLObjects := TList.Create;
1477	>	FHandle := nil;
1478	>	FTPB := nil;
1479	>	FTPBLength := 0;
1480	>	FTRParams := TStringList.Create;
1481	>	FTRParamsChanged := True;
1482	>	TStringList(FTRParams).OnChange := TRParamsChange;
1483	>	TStringList(FTRParams).OnChanging := TRParamsChanging;
1484	>	FTimer := TFPTimer.Create(Self);
1485	>	FTimer.Enabled := False;
1486	>	FTimer.Interval := 0;
1487	>	FTimer.OnTimer := TimeoutTransaction;
1488	>	FDefaultAction := taCommit;
1489	>	end;
1490	>
1491	>	destructor TIBTransaction.Destroy;
1492	>	var
1493	>	i: Integer;
1494	>	begin
1495	>	if FIBLoaded then
1496	>	begin
1497	>	if InTransaction then
1498	>	EndTransaction(FDefaultAction, True);
1499	>	for i := 0 to FSQLObjects.Count - 1 do
1500	>	if FSQLObjects[i] <> nil then
1501	>	SQLObjects[i].DoTransactionFree;
1502	>	RemoveSQLObjects;
1503	>	RemoveDatabases;
1504	>	FreeMem(FTPB);
1505	>	FTPB := nil;
1506	>	FTRParams.Free;
1507	>	FSQLObjects.Free;
1508	>	FDatabases.Free;
1509	>	end;
1510	>	inherited Destroy;
1511	>	end;
1512	>
1513	>	function TIBTransaction.Call(ErrCode: ISC_STATUS;
1514	>	RaiseError: Boolean): ISC_STATUS;
1515	>	var
1516	>	i: Integer;
1517	>	begin
1518	>	result := ErrCode;
1519	>	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1520	>	Databases[i].FCanTimeout := False;
1521	>	FCanTimeout := False;
1522	>	if RaiseError and (result > 0) then
1523	>	IBDataBaseError;
1524	>	end;
1525	>
1526	>	procedure TIBTransaction.CheckDatabasesInList;
1527	>	begin
1528	>	if GetDatabaseCount = 0 then
1529	>	IBError(ibxeNoDatabasesInTransaction, [nil]);
1530	>	end;
1531	>
1532	>	procedure TIBTransaction.CheckInTransaction;
1533	>	begin
1534	>	if FStreamedActive and (not InTransaction) then
1535	>	Loaded;
1536	>	if (FHandle = nil) then
1537	>	IBError(ibxeNotInTransaction, [nil]);
1538	>	end;
1539	>
1540	>	procedure TIBTransaction.DoBeforeTransactionEnd;
1541	>	begin
1542	>	if Assigned(FBeforeTransactionEnd) then
1543	>	FBeforeTransactionEnd(self);
1544	>	end;
1545	>
1546	>	procedure TIBTransaction.DoAfterTransactionEnd;
1547	>	begin
1548	>	if Assigned(FAfterTransactionEnd) then
1549	>	FAfterTransactionEnd(self);
1550	>	end;
1551	>
1552	>	procedure TIBTransaction.DoOnStartTransaction;
1553	>	begin
1554	>	if assigned(FOnStartTransaction) then
1555	>	OnStartTransaction(self);
1556	>	end;
1557	>
1558	>	procedure TIBTransaction.DoAfterExecQuery(Sender: TObject);
1559	>	begin
1560	>	if assigned(FAfterExecQuery) then
1561	>	AfterExecQuery(Sender);
1562	>	end;
1563	>
1564	>	procedure TIBTransaction.DoAfterEdit(Sender: TObject);
1565	>	begin
1566	>	if assigned(FAfterEdit) then
1567	>	AfterEdit(Sender);
1568	>	end;
1569	>
1570	>	procedure TIBTransaction.DoAfterDelete(Sender: TObject);
1571	>	begin
1572	>	if assigned(FAfterDelete) then
1573	>	AfterDelete(Sender);
1574	>	end;
1575	>
1576	>	procedure TIBTransaction.DoAfterInsert(Sender: TObject);
1577	>	begin
1578	>	if assigned(FAfterInsert) then
1579	>	AfterInsert(Sender);
1580	>	end;
1581	>
1582	>	procedure TIBTransaction.DoAfterPost(Sender: TObject);
1583	>	begin
1584	>	if assigned(FAfterPost) then
1585	>	AfterPost(Sender);
1586	>	end;
1587	>
1588	>	procedure TIBTransaction.EnsureNotInTransaction;
1589	>	begin
1590	>	if csDesigning in ComponentState then
1591	>	begin
1592	>	if FHandle <> nil then
1593	>	Rollback;
1594	>	end;
1595	>	end;
1596	>
1597	>	procedure TIBTransaction.CheckNotInTransaction;
1598	>	begin
1599	>	if (FHandle <> nil) then
1600	>	IBError(ibxeInTransaction, [nil]);
1601	>	end;
1602	>
1603	>	function TIBTransaction.AddDatabase(db: TIBDatabase): Integer;
1604	>	var
1605	>	i: Integer;
1606	>	NilFound: Boolean;
1607	>	begin
1608	>	i := FindDatabase(db);
1609	>	if i <> -1 then
1610	>	begin
1611	>	result := i;
1612	>	exit;
1613	>	end;
1614	>	NilFound := False;
1615	>	i := 0;
1616	>	while (not NilFound) and (i < FDatabases.Count) do
1617	>	begin
1618	>	NilFound := (FDatabases[i] = nil);
1619	>	if (not NilFound) then
1620	>	Inc(i);
1621	>	end;
1622	>	if (NilFound) then
1623	>	begin
1624	>	FDatabases[i] := db;
1625	>	result := i;
1626	>	end
1627	>	else
1628	>	begin
1629	>	result := FDatabases.Count;
1630	>	FDatabases.Add(db);
1631	>	end;
1632	>	end;
1633	>
1634	>	function TIBTransaction.AddSQLObject(ds: TIBBase): Integer;
1635	>	begin
1636	>	result := 0;
1637	>	while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
1638	>	Inc(result);
1639	>	if (result = FSQLObjects.Count) then
1640	>	FSQLObjects.Add(ds)
1641	>	else
1642	>	FSQLObjects[result] := ds;
1643	>	end;
1644	>
1645	>	procedure TIBTransaction.Commit;
1646	>	begin
1647	>	EndTransaction(TACommit, False);
1648	>	end;
1649	>
1650	>	procedure TIBTransaction.CommitRetaining;
1651	>	begin
1652	>	EndTransaction(TACommitRetaining, False);
1653	>	end;
1654	>
1655	>	procedure TIBTransaction.EndTransaction(Action: TTransactionAction;
1656	>	Force: Boolean);
1657	>	var
1658	>	status: ISC_STATUS;
1659	>	i: Integer;
1660	>	begin
1661	>	CheckInTransaction;
1662	>	if FInEndTransaction then Exit;
1663	>	FInEndTransaction := true;
1664	>	FEndAction := Action;
1665	>	try
1666	>	case Action of
1667	>	TARollback, TACommit:
1668	>	begin
1669	>	if (HandleIsShared) and
1670	>	(Action <> FDefaultAction) and
1671	>	(not Force) then
1672	>	IBError(ibxeCantEndSharedTransaction, [nil]);
1673	>	DoBeforeTransactionEnd;
1674	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1675	>	SQLObjects[i].DoBeforeTransactionEnd(Action);
1676	>	if InTransaction then
1677	>	begin
1678	>	if HandleIsShared then
1679	>	begin
1680	>	FHandle := nil;
1681	>	FHandleIsShared := False;
1682	>	status := 0;
1683	>	end
1684	>	else
1685	>	if (Action = TARollback) then
1686	>	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False)
1687	>	else
1688	>	status := Call(isc_commit_transaction(StatusVector, @FHandle), False);
1689	>	if ((Force) and (status > 0)) then
1690	>	status := Call(isc_rollback_transaction(StatusVector, @FHandle), False);
1691	>	if Force then
1692	>	FHandle := nil
1693	>	else
1694	>	if (status > 0) then
1695	>	IBDataBaseError;
1696	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1697	>	SQLObjects[i].DoAfterTransactionEnd;
1698	>	DoAfterTransactionEnd;
1699	>	end;
1700	>	end;
1701	>	TACommitRetaining:
1702	>	Call(isc_commit_retaining(StatusVector, @FHandle), True);
1703	>	TARollbackRetaining:
1704	>	Call(isc_rollback_retaining(StatusVector, @FHandle), True);
1705	>	end;
1706	>	if not (csDesigning in ComponentState) then
1707	>	begin
1708	>	case Action of
1709	>	TACommit:
1710	>	MonitorHook.TRCommit(Self);
1711	>	TARollback:
1712	>	MonitorHook.TRRollback(Self);
1713	>	TACommitRetaining:
1714	>	MonitorHook.TRCommitRetaining(Self);
1715	>	TARollbackRetaining:
1716	>	MonitorHook.TRRollbackRetaining(Self);
1717	>	end;
1718	>	end;
1719	>	finally
1720	>	FInEndTransaction := false
1721	>	end;
1722	>	end;
1723	>
1724	>	function TIBTransaction.GetDatabase(Index: Integer): TIBDatabase;
1725	>	begin
1726	>	result := FDatabases[Index];
1727	>	end;
1728	>
1729	>	function TIBTransaction.GetDatabaseCount: Integer;
1730	>	var
1731	>	i, Cnt: Integer;
1732	>	begin
1733	>	result := 0;
1734	>	Cnt := FDatabases.Count - 1;
1735	>	for i := 0 to Cnt do if FDatabases[i] <> nil then
1736	>	Inc(result);
1737	>	end;
1738	>
1739	>	function TIBTransaction.GetSQLObject(Index: Integer): TIBBase;
1740	>	begin
1741	>	result := FSQLObjects[Index];
1742	>	end;
1743	>
1744	>	function TIBTransaction.GetSQLObjectCount: Integer;
1745	>	var
1746	>	i, Cnt: Integer;
1747	>	begin
1748	>	result := 0;
1749	>	Cnt := FSQLObjects.Count - 1;
1750	>	for i := 0 to Cnt do if FSQLObjects[i] <> nil then
1751	>	Inc(result);
1752	>	end;
1753	>
1754	>	function TIBTransaction.GetInTransaction: Boolean;
1755	>	begin
1756	>	result := (FHandle <> nil);
1757	>	end;
1758	>
1759	>	function TIBTransaction.FindDatabase(db: TIBDatabase): Integer;
1760	>	var
1761	>	i: Integer;
1762	>	begin
1763	>	result := -1;
1764	>	for i := 0 to FDatabases.Count - 1 do
1765	>	if db = TIBDatabase(FDatabases[i]) then
1766	>	begin
1767	>	result := i;
1768	>	break;
1769	>	end;
1770	>	end;
1771	>
1772	>	function TIBTransaction.FindDefaultDatabase: TIBDatabase;
1773	>	var
1774	>	i: Integer;
1775	>	begin
1776	>	result := FDefaultDatabase;
1777	>	if result = nil then
1778	>	begin
1779	>	for i := 0 to FDatabases.Count - 1 do
1780	>	if (TIBDatabase(FDatabases[i]) <> nil) and
1781	>	(TIBDatabase(FDatabases[i]).DefaultTransaction = self) then
1782	>	begin
1783	>	result := TIBDatabase(FDatabases[i]);
1784	>	break;
1785	>	end;
1786	>	end;
1787	>	end;
1788	>
1789	>	function TIBTransaction.GetEndAction: TTransactionAction;
1790	>	begin
1791	>	if FInEndTransaction then
1792	>	Result := FEndAction
1793	>	else
1794	>	IBError(ibxeIB60feature, [nil])
1795	>	end;
1796	>
1797	>
1798	>	function TIBTransaction.GetIdleTimer: Integer;
1799	>	begin
1800	>	result := FTimer.Interval;
1801	>	end;
1802	>
1803	>	procedure TIBTransaction.Loaded;
1804	>	begin
1805	>	inherited Loaded;
1806	>	end;
1807	>
1808	>	procedure TIBTransaction.BeforeDatabaseDisconnect(DB: TIBDatabase);
1809	>	begin
1810	>	if InTransaction then
1811	>	EndTransaction(FDefaultAction, True);
1812	>	end;
1813	>
1814	>	procedure TIBTransaction.RemoveDatabase(Idx: Integer);
1815	>	var
1816	>	DB: TIBDatabase;
1817	>	begin
1818	>	if ((Idx >= 0) and (FDatabases[Idx] <> nil)) then
1819	>	begin
1820	>	DB := Databases[Idx];
1821	>	FDatabases[Idx] := nil;
1822	>	DB.RemoveTransaction(DB.FindTransaction(Self));
1823	>	if DB = FDefaultDatabase then
1824	>	FDefaultDatabase := nil;
1825	>	end;
1826	>	end;
1827	>
1828	>	procedure TIBTransaction.RemoveDatabases;
1829	>	var
1830	>	i: Integer;
1831	>	begin
1832	>	for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
1833	>	RemoveDatabase(i);
1834	>	end;
1835	>
1836	>	procedure TIBTransaction.RemoveSQLObject(Idx: Integer);
1837	>	var
1838	>	ds: TIBBase;
1839	>	begin
1840	>	if ((Idx >= 0) and (FSQLObjects[Idx] <> nil)) then
1841	>	begin
1842	>	ds := SQLObjects[Idx];
1843	>	FSQLObjects[Idx] := nil;
1844	>	ds.Transaction := nil;
1845	>	end;
1846	>	end;
1847	>
1848	>	procedure TIBTransaction.RemoveSQLObjects;
1849	>	var
1850	>	i: Integer;
1851	>	begin
1852	>	for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
1853	>	RemoveSQLObject(i);
1854	>	end;
1855	>
1856	>	procedure TIBTransaction.Rollback;
1857	>	begin
1858	>	EndTransaction(TARollback, False);
1859	>	end;
1860	>
1861	>	procedure TIBTransaction.RollbackRetaining;
1862	>	begin
1863	>	EndTransaction(TARollbackRetaining, False);
1864	>	end;
1865	>
1866	>	procedure TIBTransaction.SetActive(Value: Boolean);
1867	>	begin
1868	>	if csReading in ComponentState then
1869	>	FStreamedActive := Value
1870	>	else
1871	>	if Value and not InTransaction then
1872	>	StartTransaction
1873	>	else
1874	>	if not Value and InTransaction then
1875	>	Rollback;
1876	>	end;
1877	>
1878	>	procedure TIBTransaction.SetDefaultAction(Value: TTransactionAction);
1879	>	begin
1880	>	(*  if (Value = taRollbackRetaining) and (GetIBClientVersion < 6) then
1881	>	IBError(ibxeIB60feature, [nil]);*)
1882	>	FDefaultAction := Value;
1883	>	end;
1884	>
1885	>	procedure TIBTransaction.SetDefaultDatabase(Value: TIBDatabase);
1886	>	var
1887	>	i: integer;
1888	>	begin
1889	>	if (FDefaultDatabase <> nil) and (FDefaultDatabase <> Value) then
1890	>	begin
1891	>	i := FDefaultDatabase.FindTransaction(self);
1892	>	if (i <> -1) then
1893	>	FDefaultDatabase.RemoveTransaction(i);
1894	>	end;
1895	>	if (Value <> nil) and (FDefaultDatabase <> Value) then
1896	>	begin
1897	>	Value.AddTransaction(Self);
1898	>	AddDatabase(Value);
1899	>	for i := 0 to FSQLObjects.Count - 1 do
1900	>	if (FSQLObjects[i] <> nil) and
1901	>	(TIBBase(FSQLObjects[i]).Database = nil) then
1902	>	SetObjectProp(TIBBase(FSQLObjects[i]).Owner, 'Database', Value);
1903	>	end;
1904	>	FDefaultDatabase := Value;
1905	>	end;
1906	>
1907	>	procedure TIBTransaction.SetHandle(Value: TISC_TR_HANDLE);
1908	>	begin
1909	>	if (HandleIsShared) then
1910	>	EndTransaction(DefaultAction, True)
1911	>	else
1912	>	CheckNotInTransaction;
1913	>	FHandle := Value;
1914	>	FHandleIsShared := (Value <> nil);
1915	>	end;
1916	>
1917	>	procedure TIBTransaction.Notification( AComponent: TComponent;
1918	>	Operation: TOperation);
1919	>	var
1920	>	i: Integer;
1921	>	begin
1922	>	inherited Notification( AComponent, Operation);
1923	>	if (Operation = opRemove) and (AComponent = FDefaultDatabase) then
1924	>	begin
1925	>	i := FindDatabase(FDefaultDatabase);
1926	>	if (i <> -1) then
1927	>	RemoveDatabase(i);
1928	>	FDefaultDatabase := nil;
1929	>	end;
1930	>	end;
1931	>
1932	>	procedure TIBTransaction.SetIdleTimer(Value: Integer);
1933	>	begin
1934	>	if Value < 0 then
1935	>	IBError(ibxeTimeoutNegative, [nil])
1936	>	else
1937	>	if (Value = 0) then
1938	>	begin
1939	>	FTimer.Enabled := False;
1940	>	FTimer.Interval := 0;
1941	>	end
1942	>	else
1943	>	if (Value > 0) then
1944	>	begin
1945	>	FTimer.Interval := Value;
1946	>	if not (csDesigning in ComponentState) then
1947	>	FTimer.Enabled := True;
1948	>	end;
1949	>	end;
1950	>
1951	>	procedure TIBTransaction.SetTRParams(Value: TStrings);
1952	>	begin
1953	>	FTRParams.Assign(Value);
1954	>	end;
1955	>
1956	>	procedure TIBTransaction.StartTransaction;
1957	>	var
1958	>	pteb: PISC_TEB_ARRAY;
1959	>	TPB: String;
1960	>	i: Integer;
1961	>	begin
1962	>	CheckNotInTransaction;
1963	>	CheckDatabasesInList;
1964	>	for i := 0 to FDatabases.Count - 1 do
1965	>	if  FDatabases[i] <> nil then
1966	>	begin
1967	>	with TIBDatabase(FDatabases[i]) do
1968	>	if not Connected then
1969	>	if FStreamedConnected then
1970	>	begin
1971	>	Open;
1972	>	FStreamedConnected := False;
1973	>	end
1974	>	else
1975	>	IBError(ibxeDatabaseClosed, [nil]);
1976	>	end;
1977	>	if FTRParamsChanged then
1978	>	begin
1979	>	FTRParamsChanged := False;
1980	>	GenerateTPB(FTRParams, TPB, FTPBLength);
1981	>	if FTPBLength > 0 then
1982	>	begin
1983	>	IBAlloc(FTPB, 0, FTPBLength);
1984	>	Move(TPB[1], FTPB[0], FTPBLength);
1985	>	end;
1986	>	end;
1987	>
1988	>	pteb := nil;
1989	>	IBAlloc(pteb, 0, DatabaseCount * SizeOf(TISC_TEB));
1990	>	try
1991	>	for i := 0 to DatabaseCount - 1 do if Databases[i] <> nil then
1992	>	begin
1993	>	pteb^[i].db_handle := @(Databases[i].Handle);
1994	>	pteb^[i].tpb_length := FTPBLength;
1995	>	pteb^[i].tpb_address := FTPB;
1996	>	end;
1997	>	if Call(isc_start_multiple(StatusVector, @FHandle,
1998	>	DatabaseCount, PISC_TEB(pteb)), False) > 0 then
1999	>	begin
2000	>	FHandle := nil;
2001	>	IBDataBaseError;
2002	>	end;
2003	>	if not (csDesigning in ComponentState) then
2004	>	MonitorHook.TRStart(Self);
2005	>	finally
2006	>	FreeMem(pteb);
2007	>	end;
2008	>	DoOnStartTransaction;
2009	>	end;
2010	>
2011	>	procedure TIBTransaction.TimeoutTransaction(Sender: TObject);
2012	>	begin
2013	>	if InTransaction then
2014	>	begin
2015	>	if FCanTimeout then
2016	>	begin
2017	>	EndTransaction(FDefaultAction, True);
2018	>	if Assigned(FOnIdleTimer) then
2019	>	FOnIdleTimer(Self);
2020	>	end
2021	>	else
2022	>	FCanTimeout := True;
2023	>	end;
2024	>	end;
2025	>
2026	>	procedure TIBTransaction.TRParamsChange(Sender: TObject);
2027	>	begin
2028	>	FTRParamsChanged := True;
2029	>	end;
2030	>
2031	>	procedure TIBTransaction.TRParamsChanging(Sender: TObject);
2032	>	begin
2033	>	EnsureNotInTransaction;
2034	>	CheckNotInTransaction;
2035	>	end;
2036	>
2037	>	{ TIBBase }
2038	>	constructor TIBBase.Create(AOwner: TObject);
2039	>	begin
2040	>	FOwner := AOwner;
2041	>	end;
2042	>
2043	>	destructor TIBBase.Destroy;
2044	>	begin
2045	>	SetDatabase(nil);
2046	>	SetTransaction(nil);
2047	>	inherited Destroy;
2048	>	end;
2049	>
2050	>	function TIBBase.GetCharSetSize(CharSetID: integer): integer;
2051	>	begin
2052	>	if (CharSetID >= 0) and (CharSetID < Length(Database.FCharSetSizes)) then
2053	>	Result := Database.FCharSetSizes[CharSetID]
2054	>	else
2055	>	Result := 1; {Unknown character set}
2056	>	end;
2057	>
2058	>	function TIBBase.GetDefaultCharSetSize: integer;
2059	>	var DefaultCharSetName: string;
2060	>	i: integer;
2061	>	begin
2062	>	DefaultCharSetName := GetDefaultCharSetName;
2063	>	Result := 4; {worse case}
2064	>	for i := 0 to Length(Database.FCharSetSizes) - 1 do
2065	>	if Database.FCharSetNames[i] = DefaultCharSetName then
2066	>	begin
2067	>	Result := Database.FCharSetSizes[i];
2068	>	break;
2069	>	end;
2070	>	end;
2071	>
2072	>	function TIBBase.GetCharSetName(CharSetID: integer): string;
2073	>	begin
2074	>	if (CharSetID >= 0) and (CharSetID < Length(Database.FCharSetNames)) then
2075	>	Result := Database.FCharSetNames[CharSetID]
2076	>	else
2077	>	Result := ''; {Unknown character set}
2078	>	end;
2079	>
2080	>	function TIBBase.GetDefaultCharSetName: string;
2081	>	begin
2082	>	Result := AnsiUpperCase(Database.Params.Values['lc_ctype']);
2083	>	end;
2084	>
2085	>	procedure TIBBase.HandleException(Sender: TObject);
2086	>	begin
2087	>	if assigned(Database) then
2088	>	Database.HandleException(Sender)
2089	>	else
2090	>	SysUtils.ShowException(ExceptObject,ExceptAddr);
2091	>	end;
2092	>
2093	>	procedure TIBBase.SetCursor;
2094	>	begin
2095	>	if Assigned(Database) and not Database.SQLHourGlass then
2096	>	Exit;
2097	>	if assigned(IBGUIInterface) then
2098	>	IBGUIInterface.SetCursor;
2099	>	end;
2100	>
2101	>	procedure TIBBase.RestoreCursor;
2102	>	begin
2103	>	if Assigned(Database) and not Database.SQLHourGlass then
2104	>	Exit;
2105	>	if assigned(IBGUIInterface) then
2106	>	IBGUIInterface.RestoreCursor;
2107	>	end;
2108	>
2109	>	procedure TIBBase.CheckDatabase;
2110	>	begin
2111	>	if (FDatabase = nil) then
2112	>	IBError(ibxeDatabaseNotAssigned, [nil]);
2113	>	FDatabase.CheckActive;
2114	>	end;
2115	>
2116	>	procedure TIBBase.CheckTransaction;
2117	>	begin
2118	>	if FTransaction = nil then
2119	>	IBError(ibxeTransactionNotAssigned, [nil]);
2120	>	FTransaction.CheckInTransaction;
2121	>	end;
2122	>
2123	>	function TIBBase.GetDBHandle: PISC_DB_HANDLE;
2124	>	begin
2125	>	CheckDatabase;
2126	>	result := @FDatabase.Handle;
2127	>	end;
2128	>
2129	>	function TIBBase.GetTRHandle: PISC_TR_HANDLE;
2130	>	begin
2131	>	CheckTransaction;
2132	>	result := @FTransaction.Handle;
2133	>	end;
2134	>
2135	>	procedure TIBBase.DoBeforeDatabaseConnect(DBParams: TStrings; var DBName: string
2136	>	);
2137	>	begin
2138	>	if assigned(FBeforeDatabaseConnect) then
2139	>	BeforeDatabaseConnect(self,DBParams,DBName);
2140	>	end;
2141	>
2142	>	procedure TIBBase.DoAfterDatabaseConnect;
2143	>	begin
2144	>	if assigned(FAfterDatabaseConnect) then
2145	>	AfterDatabaseConnect(self);
2146	>	end;
2147	>
2148	>	procedure TIBBase.DoBeforeDatabaseDisconnect;
2149	>	begin
2150	>	if Assigned(BeforeDatabaseDisconnect) then
2151	>	BeforeDatabaseDisconnect(Self);
2152	>	end;
2153	>
2154	>	procedure TIBBase.DoAfterDatabaseDisconnect;
2155	>	begin
2156	>	if Assigned(AfterDatabaseDisconnect) then
2157	>	AfterDatabaseDisconnect(Self);
2158	>	end;
2159	>
2160	>	procedure TIBBase.DoDatabaseFree;
2161	>	begin
2162	>	if Assigned(OnDatabaseFree) then
2163	>	OnDatabaseFree(Self);
2164	>	SetDatabase(nil);
2165	>	SetTransaction(nil);
2166	>	end;
2167	>
2168	>	procedure TIBBase.DoBeforeTransactionEnd(Action: TTransactionAction);
2169	>	begin
2170	>	if Assigned(BeforeTransactionEnd) then
2171	>	BeforeTransactionEnd(Self,Action);
2172	>	end;
2173	>
2174	>	procedure TIBBase.DoAfterTransactionEnd;
2175	>	begin
2176	>	if Assigned(AfterTransactionEnd) then
2177	>	AfterTransactionEnd(Self);
2178	>	end;
2179	>
2180	>	procedure TIBBase.DoTransactionFree;
2181	>	begin
2182	>	if Assigned(OnTransactionFree) then
2183	>	OnTransactionFree(Self);
2184	>	FTransaction := nil;
2185	>	end;
2186	>
2187	>	procedure TIBBase.DoAfterExecQuery(Sender: TObject);
2188	>	begin
2189	>	if FTransaction <> nil then
2190	>	FTransaction.DoAfterExecQuery(Sender);
2191	>	end;
2192	>
2193	>	procedure TIBBase.DoAfterEdit(Sender: TObject);
2194	>	begin
2195	>	if FTransaction <> nil then
2196	>	FTransaction.DoAfterEdit(Sender);
2197	>	end;
2198	>
2199	>	procedure TIBBase.DoAfterDelete(Sender: TObject);
2200	>	begin
2201	>	if FTransaction <> nil then
2202	>	FTransaction.DoAfterDelete(Sender);
2203	>	end;
2204	>
2205	>	procedure TIBBase.DoAfterInsert(Sender: TObject);
2206	>	begin
2207	>	if FTransaction <> nil then
2208	>	FTransaction.DoAfterInsert(Sender);
2209	>	end;
2210	>
2211	>	procedure TIBBase.DoAfterPost(Sender: TObject);
2212	>	begin
2213	>	if FTransaction <> nil then
2214	>	FTransaction.DoAfterPost(Sender);
2215	>	end;
2216	>
2217	>	procedure TIBBase.SetDatabase(Value: TIBDatabase);
2218	>	begin
2219	>	if (FDatabase <> nil) then
2220	>	FDatabase.RemoveSQLObject(FIndexInDatabase);
2221	>	FDatabase := Value;
2222	>	if (FDatabase <> nil) then
2223	>	begin
2224	>	FIndexInDatabase := FDatabase.AddSQLObject(Self);
2225	>	if (FTransaction = nil) then
2226	>	Transaction := FDatabase.FindDefaultTransaction;
2227	>	end;
2228	>	end;
2229	>
2230	>	procedure TIBBase.SetTransaction(Value: TIBTransaction);
2231	>	begin
2232	>	if (FTransaction <> nil) then
2233	>	FTransaction.RemoveSQLObject(FIndexInTransaction);
2234	>	FTransaction := Value;
2235	>	if (FTransaction <> nil) then
2236	>	begin
2237	>	FIndexInTransaction := FTransaction.AddSQLObject(Self);
2238	>	if (FDatabase = nil) then
2239	>	Database := FTransaction.FindDefaultDatabase;
2240	>	end;
2241	>	end;
2242	>
2243	>	{ GenerateDPB -
2244	>	Given a string containing a textual representation
2245	>	of the database parameters, generate a database
2246	>	parameter buffer, and return it and its length
2247	>	in DPB and DPBLength, respectively. }
2248	>
2249	>	procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
2250	>	var
2251	>	i, j, pval: Integer;
2252	>	DPBVal: UShort;
2253	>	ParamName, ParamValue: string;
2254	>	begin
2255	>	{ The DPB is initially empty, with the exception that
2256	>	the DPB version must be the first byte of the string. }
2257	>	DPBLength := 1;
2258	>	DPB := Char(isc_dpb_version1);
2259	>
2260	>	{Iterate through the textual database parameters, constructing
2261	>	a DPB on-the-fly }
2262	>	for i := 0 to sl.Count - 1 do
2263	>	begin
2264	>	{ Get the parameter's name and value from the list,
2265	>	and make sure that the name is all lowercase with
2266	>	no leading 'isc_dpb_' prefix
2267	>	}
2268	>	if (Trim(sl.Names[i]) = '') then
2269	>	continue;
2270	>	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
2271	>	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
2272	>	if (Pos(DPBPrefix, ParamName) = 1) then {mbcs ok}
2273	>	Delete(ParamName, 1, Length(DPBPrefix));
2274	>	{ We want to translate the parameter name to some Integer
2275	>	value. We do this by scanning through a list of known
2276	>	database parameter names (DPBConstantNames, defined above) }
2277	>	DPBVal := 0;
2278	>	{ Find the parameter }
2279	>	for j := 1 to isc_dpb_last_dpb_constant do
2280	>	if (ParamName = DPBConstantNames[j]) then
2281	>	begin
2282	>	DPBVal := j;
2283	>	break;
2284	>	end;
2285	>	{  A database parameter either contains a string value (case 1)
2286	>	or an Integer value (case 2)
2287	>	or no value at all (case 3)
2288	>	or an error needs to be generated (case else)  }
2289	>	case DPBVal of
2290	>	isc_dpb_user_name, isc_dpb_password, isc_dpb_password_enc,
2291	>	isc_dpb_sys_user_name, isc_dpb_license, isc_dpb_encrypt_key,
2292	>	isc_dpb_lc_messages, isc_dpb_lc_ctype,
2293	>	isc_dpb_sql_role_name, isc_dpb_sql_dialect:
2294	>	begin
2295	>	if DPBVal = isc_dpb_sql_dialect then
2296	>	ParamValue[1] := Char(Ord(ParamValue[1]) - 48);
2297	>	DPB := DPB +
2298	>	Char(DPBVal) +
2299	>	Char(Length(ParamValue)) +
2300	>	ParamValue;
2301	>	Inc(DPBLength, 2 + Length(ParamValue));
2302	>	end;
2303	>	isc_dpb_num_buffers, isc_dpb_dbkey_scope, isc_dpb_force_write,
2304	>	isc_dpb_no_reserve, isc_dpb_damaged, isc_dpb_verify:
2305	>	begin
2306	>	DPB := DPB +
2307	>	Char(DPBVal) +
2308	>	#1 +
2309	>	Char(StrToInt(ParamValue));
2310	>	Inc(DPBLength, 3);
2311	>	end;
2312	>	isc_dpb_sweep:
2313	>	begin
2314	>	DPB := DPB +
2315	>	Char(DPBVal) +
2316	>	#1 +
2317	>	Char(isc_dpb_records);
2318	>	Inc(DPBLength, 3);
2319	>	end;
2320	>	isc_dpb_sweep_interval:
2321	>	begin
2322	>	pval := StrToInt(ParamValue);
2323	>	DPB := DPB +
2324	>	Char(DPBVal) +
2325	>	#4 +
2326	>	PChar(@pval)[0] +
2327	>	PChar(@pval)[1] +
2328	>	PChar(@pval)[2] +
2329	>	PChar(@pval)[3];
2330	>	Inc(DPBLength, 6);
2331	>	end;
2332	>	isc_dpb_activate_shadow, isc_dpb_delete_shadow, isc_dpb_begin_log,
2333	>	isc_dpb_quit_log:
2334	>	begin
2335	>	DPB := DPB +
2336	>	Char(DPBVal) +
2337	>	#1 + #0;
2338	>	Inc(DPBLength, 3);
2339	>	end;
2340	>	else
2341	>	begin
2342	>	if (DPBVal > 0) and
2343	>	(DPBVal <= isc_dpb_last_dpb_constant) then
2344	>	IBError(ibxeDPBConstantNotSupported, [DPBConstantNames[DPBVal]])
2345	>	else
2346	>	IBError(ibxeDPBConstantUnknownEx, [sl.Names[i]]);
2347	>	end;
2348	>	end;
2349	>	end;
2350	>	end;
2351	>
2352	>	{ GenerateTPB -
2353	>	Given a string containing a textual representation
2354	>	of the transaction parameters, generate a transaction
2355	>	parameter buffer, and return it and its length in
2356	>	TPB and TPBLength, respectively. }
2357	>	procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
2358	>	var
2359	>	i, j, TPBVal, ParamLength: Integer;
2360	>	ParamName, ParamValue: string;
2361	>	begin
2362	>	TPB := '';
2363	>	if (sl.Count = 0) then
2364	>	TPBLength := 0
2365	>	else
2366	>	begin
2367	>	TPBLength := sl.Count + 1;
2368	>	TPB := TPB + Char(isc_tpb_version3);
2369	>	end;
2370	>	for i := 0 to sl.Count - 1 do
2371	>	begin
2372	>	if (Trim(sl[i]) =  '') then
2373	>	begin
2374	>	Dec(TPBLength);
2375	>	Continue;
2376	>	end;
2377	>	if (Pos('=', sl[i]) = 0) then {mbcs ok}
2378	>	ParamName := LowerCase(sl[i]) {mbcs ok}
2379	>	else
2380	>	begin
2381	>	ParamName := LowerCase(sl.Names[i]); {mbcs ok}
2382	>	ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
2383	>	end;
2384	>	if (Pos(TPBPrefix, ParamName) = 1) then {mbcs ok}
2385	>	Delete(ParamName, 1, Length(TPBPrefix));
2386	>	TPBVal := 0;
2387	>	{ Find the parameter }
2388	>	for j := 1 to isc_tpb_last_tpb_constant do
2389	>	if (ParamName = TPBConstantNames[j]) then
2390	>	begin
2391	>	TPBVal := j;
2392	>	break;
2393	>	end;
2394	>	{ Now act on it }
2395	>	case TPBVal of
2396	>	isc_tpb_consistency, isc_tpb_exclusive, isc_tpb_protected,
2397	>	isc_tpb_concurrency, isc_tpb_shared, isc_tpb_wait, isc_tpb_nowait,
2398	>	isc_tpb_read, isc_tpb_write, isc_tpb_ignore_limbo,
2399	>	isc_tpb_read_committed, isc_tpb_rec_version, isc_tpb_no_rec_version:
2400	>	TPB := TPB + Char(TPBVal);
2401	>	isc_tpb_lock_read, isc_tpb_lock_write:
2402	>	begin
2403	>	TPB := TPB + Char(TPBVal);
2404	>	{ Now set the string parameter }
2405	>	ParamLength := Length(ParamValue);
2406	>	Inc(TPBLength, ParamLength + 1);
2407	>	TPB := TPB + Char(ParamLength) + ParamValue;
2408	>	end;
2409	>	else
2410	>	begin
2411	>	if (TPBVal > 0) and
2412	>	(TPBVal <= isc_tpb_last_tpb_constant) then
2413	>	IBError(ibxeTPBConstantNotSupported, [TPBConstantNames[TPBVal]])
2414	>	else
2415	>	IBError(ibxeTPBConstantUnknownEx, [sl.Names[i]]);
2416	>	end;
2417	>	end;
2418	>	end;
2419	>	end;
2420	>
2421	>	end.
2422	>
2423	>
2424	>
2425	>
2426	>

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