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

Comparing ibx/trunk/runtime/IBCustomDataSet.pas (file contents):
Revision 11 by tony, Tue Oct 9 08:10:32 2012 UTC vs.
Revision 19 by tony, Mon Jul 7 13:00:15 2014 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 IBCustomDataSet;
35	<
36	<	{$Mode Delphi}
37	<
38	<	{$IFDEF DELPHI}
39	<	{$DEFINE TDBDFIELD_IS_BCD}
40	<	{$ENDIF}
41	<
42	<	interface
43	<
44	<	uses
45	<	{$IFDEF WINDOWS }
46	<	Windows,
47	<	{$ELSE}
48	<	unix,
49	<	{$ENDIF}
50	<	SysUtils, Classes, Forms, Controls, IBDatabase,
51	<	IBExternals, IB, IBHeader,  IBSQL, Db,
52	<	IBUtils, IBBlob;
53	<
54	<	const
55	<	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
56	<	UniCache           =  2;     { Uni-directional cache is 2 records big }
57	<
58	<	type
59	<	TIBCustomDataSet = class;
60	<	TIBDataSet = class;
61	<
62	<	{ TIBDataSetUpdateObject }
63	<
64	<	TIBDataSetUpdateObject = class(TComponent)
65	<	private
66	<	FRefreshSQL: TStrings;
67	<	procedure SetRefreshSQL(value: TStrings);
68	<	protected
69	<	function GetDataSet: TIBCustomDataSet; virtual; abstract;
70	<	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
71	<	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
72	<	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
73	<	procedure InternalSetParams(Query: TIBSQL; buff: PChar);
74	<	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
75	<	public
76	<	constructor Create(AOwner: TComponent); override;
77	<	destructor Destroy; override;
78	<	published
79	<	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
80	<	end;
81	<
82	<	TBlobDataArray = array[0..0] of TIBBlobStream;
83	<	PBlobDataArray = ^TBlobDataArray;
84	<
85	<	{ TIBCustomDataSet }
86	<	TFieldData = record
87	<	fdDataType: Short;
88	<	fdDataScale: Short;
89	<	fdNullable: Boolean;
90	<	fdIsNull: Boolean;
91	<	fdDataSize: Short;
92	<	fdDataLength: Short;
93	<	fdDataOfs: Integer;
94	<	end;
95	<	PFieldData = ^TFieldData;
96	<
97	<	TCachedUpdateStatus = (
98	<	cusUnmodified, cusModified, cusInserted,
99	<	cusDeleted, cusUninserted
100	<	);
101	<	TIBDBKey = record
102	<	DBKey: array[0..7] of Byte;
103	<	end;
104	<	PIBDBKey = ^TIBDBKey;
105	<
106	<	TRecordData = record
107	<	rdBookmarkFlag: TBookmarkFlag;
108	<	rdFieldCount: Short;
109	<	rdRecordNumber: Integer;
110	<	rdCachedUpdateStatus: TCachedUpdateStatus;
111	<	rdUpdateStatus: TUpdateStatus;
112	<	rdSavedOffset: DWORD;
113	<	rdDBKey: TIBDBKey;
114	<	rdFields: array[1..1] of TFieldData;
115	<	end;
116	<	PRecordData = ^TRecordData;
117	<
118	<	{ TIBStringField allows us to have strings longer than 8196 }
119	<
120	<	TIBStringField = class(TStringField)
121	<	public
122	<	constructor create(AOwner: TComponent); override;
123	<	class procedure CheckTypeSize(Value: Integer); override;
124	<	function GetAsString: string; override;
125	<	function GetAsVariant: Variant; override;
126	<	function GetValue(var Value: string): Boolean;
127	<	procedure SetAsString(const Value: string); override;
128	<	end;
129	<
130	<	{ TIBBCDField }
131	<	{  Actually, there is no BCD involved in this type,
132	<	instead it deals with currency types.
133	<	In IB, this is an encapsulation of Numeric (x, y)
134	<	where x < 18 and y <= 4.
135	<	Note: y > 4 will default to Floats
136	<	}
137	<	TIBBCDField = class(TBCDField)
138	<	protected
139	<	class procedure CheckTypeSize(Value: Integer); override;
140	<	function GetAsCurrency: Currency; override;
141	<	function GetAsString: string; override;
142	<	function GetAsVariant: Variant; override;
143	<	function GetDataSize: Integer; override;
144	<	public
145	<	constructor Create(AOwner: TComponent); override;
146	<	published
147	<	property Size default 8;
148	<	end;
149	<
150	<	TIBDataLink = class(TDetailDataLink)
151	<	private
152	<	FDataSet: TIBCustomDataSet;
153	<	protected
154	<	procedure ActiveChanged; override;
155	<	procedure RecordChanged(Field: TField); override;
156	<	function GetDetailDataSet: TDataSet; override;
157	<	procedure CheckBrowseMode; override;
158	<	public
159	<	constructor Create(ADataSet: TIBCustomDataSet);
160	<	destructor Destroy; override;
161	<	end;
162	<
163	<	TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord);
164	<
165	<	{ TIBGenerator }
166	<
167	<	TIBGenerator = class(TPersistent)
168	<	private
169	<	FOwner: TIBCustomDataSet;
170	<	FApplyOnEvent: TIBGeneratorApplyOnEvent;
171	<	FFieldName: string;
172	<	FGeneratorName: string;
173	<	FIncrement: integer;
174	<	procedure SetIncrement(const AValue: integer);
175	<	protected
176	<	function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer;
177	<	public
178	<	constructor Create(Owner: TIBCustomDataSet);
179	<	procedure Apply;
180	<	property Owner: TIBCustomDataSet read FOwner;
181	<	published
182	<	property Generator: string read FGeneratorName write FGeneratorName;
183	<	property Field: string read FFieldName write FFieldName;
184	<	property Increment: integer read FIncrement write SetIncrement default 1;
185	<	property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
186	<	end;
187	<
188	<	{ TIBCustomDataSet }
189	<	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
190	<
191	<	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
192	<	UpdateKind: TUpdateKind; var UpdateAction: TIBUpdateAction)
193	<	of object;
194	<	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
195	<	var UpdateAction: TIBUpdateAction) of object;
196	<
197	<	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
198	<
199	<	TIBCustomDataSet = class(TDataset)
200	<	private
201	<	FGeneratorField: TIBGenerator;
202	<	FNeedsRefresh: Boolean;
203	<	FForcedRefresh: Boolean;
204	<	FDidActivate: Boolean;
205	<	FIBLoaded: Boolean;
206	<	FBase: TIBBase;
207	<	FBlobCacheOffset: Integer;
208	<	FBlobStreamList: TList;
209	<	FBufferChunks: Integer;
210	<	FBufferCache,
211	<	FOldBufferCache: PChar;
212	<	FBufferChunkSize,
213	<	FCacheSize,
214	<	FOldCacheSize: Integer;
215	<	FFilterBuffer: PChar;
216	<	FBPos,
217	<	FOBPos,
218	<	FBEnd,
219	<	FOBEnd: DWord;
220	<	FCachedUpdates: Boolean;
221	<	FCalcFieldsOffset: Integer;
222	<	FCurrentRecord: Long;
223	<	FDeletedRecords: Long;
224	<	FModelBuffer,
225	<	FOldBuffer: PChar;
226	<	FOpen: Boolean;
227	<	FInternalPrepared: Boolean;
228	<	FQDelete,
229	<	FQInsert,
230	<	FQRefresh,
231	<	FQSelect,
232	<	FQModify: TIBSQL;
233	<	FRecordBufferSize: Integer;
234	<	FRecordCount: Integer;
235	<	FRecordSize: Integer;
236	<	FUniDirectional: Boolean;
237	<	FUpdateMode: TUpdateMode;
238	<	FUpdateObject: TIBDataSetUpdateObject;
239	<	FParamCheck: Boolean;
240	<	FUpdatesPending: Boolean;
241	<	FUpdateRecordTypes: TIBUpdateRecordTypes;
242	<	FMappedFieldPosition: array of Integer;
243	<	FDataLink: TIBDataLink;
244	<
245	<	FBeforeDatabaseDisconnect,
246	<	FAfterDatabaseDisconnect,
247	<	FDatabaseFree: TNotifyEvent;
248	<	FOnUpdateError: TIBUpdateErrorEvent;
249	<	FOnUpdateRecord: TIBUpdateRecordEvent;
250	<	FBeforeTransactionEnd,
251	<	FAfterTransactionEnd,
252	<	FTransactionFree: TNotifyEvent;
253	<
254	<	function GetSelectStmtHandle: TISC_STMT_HANDLE;
255	<	procedure SetUpdateMode(const Value: TUpdateMode);
256	<	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
257	<
258	<	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
259	<	procedure AdjustRecordOnInsert(Buffer: Pointer);
260	<	function CanEdit: Boolean;
261	<	function CanInsert: Boolean;
262	<	function CanDelete: Boolean;
263	<	function CanRefresh: Boolean;
264	<	procedure CheckEditState;
265	<	procedure ClearBlobCache;
266	<	procedure CopyRecordBuffer(Source, Dest: Pointer);
267	<	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
268	<	procedure DoAfterDatabaseDisconnect(Sender: TObject);
269	<	procedure DoDatabaseFree(Sender: TObject);
270	<	procedure DoBeforeTransactionEnd(Sender: TObject);
271	<	procedure DoAfterTransactionEnd(Sender: TObject);
272	<	procedure DoTransactionFree(Sender: TObject);
273	<	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
274	<	Buffer: PChar);
275	<	function GetDatabase: TIBDatabase;
276	<	function GetDBHandle: PISC_DB_HANDLE;
277	<	function GetDeleteSQL: TStrings;
278	<	function GetInsertSQL: TStrings;
279	<	function GetSQLParams: TIBXSQLDA;
280	<	function GetRefreshSQL: TStrings;
281	<	function GetSelectSQL: TStrings;
282	<	function GetStatementType: TIBSQLTypes;
283	<	function GetModifySQL: TStrings;
284	<	function GetTransaction: TIBTransaction;
285	<	function GetTRHandle: PISC_TR_HANDLE;
286	<	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
287	<	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
288	<	Options: TLocateOptions): Boolean; virtual;
289	<	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
290	<	procedure InternalRevertRecord(RecordNumber: Integer); virtual;
291	<	function IsVisible(Buffer: PChar): Boolean;
292	<	procedure SaveOldBuffer(Buffer: PChar);
293	<	procedure SetBufferChunks(Value: Integer);
294	<	procedure SetDatabase(Value: TIBDatabase);
295	<	procedure SetDeleteSQL(Value: TStrings);
296	<	procedure SetInsertSQL(Value: TStrings);
297	<	procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
298	<	procedure SetRefreshSQL(Value: TStrings);
299	<	procedure SetSelectSQL(Value: TStrings);
300	<	procedure SetModifySQL(Value: TStrings);
301	<	procedure SetTransaction(Value: TIBTransaction);
302	<	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
303	<	procedure SetUniDirectional(Value: Boolean);
304	<	procedure RefreshParams;
305	<	procedure SQLChanging(Sender: TObject); virtual;
306	<	function AdjustPosition(FCache: PChar; Offset: DWORD;
307	<	Origin: Integer): DWORD;
308	<	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
309	<	Buffer: PChar);
310	<	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
311	<	ReadOldBuffer: Boolean);
312	<	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
313	<	Buffer: PChar);
314	<	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
315	<	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
316	<	DoCheck: Boolean): TGetResult; virtual;
317	<
318	<	protected
319	<	procedure ActivateConnection;
320	<	function ActivateTransaction: Boolean;
321	<	procedure DeactivateTransaction;
322	<	procedure CheckDatasetClosed;
323	<	procedure CheckDatasetOpen;
324	<	function GetActiveBuf: PChar;
325	<	procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
326	<	procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
327	<	procedure InternalPrepare; virtual;
328	<	procedure InternalUnPrepare; virtual;
329	<	procedure InternalExecQuery; virtual;
330	<	procedure InternalRefreshRow; virtual;
331	<	procedure InternalSetParamsFromCursor; virtual;
332	<	procedure CheckNotUniDirectional;
333	<
334	<	(*    { IProviderSupport }
335	<	procedure PSEndTransaction(Commit: Boolean); override;
336	<	function PSExecuteStatement(const ASQL: string; AParams: TParams;
337	<	ResultSet: Pointer = nil): Integer; override;
338	<	function PsGetTableName: string; override;
339	<	function PSGetQuoteChar: string; override;
340	<	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
341	<	function PSInTransaction: Boolean; override;
342	<	function PSIsSQLBased: Boolean; override;
343	<	function PSIsSQLSupported: Boolean; override;
344	<	procedure PSStartTransaction; override;
345	<	procedure PSReset; override;
346	<	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
347	<	*)
348	<	{ TDataSet support }
349	<	procedure InternalInsert; override;
350	<	procedure InitRecord(Buffer: PChar); override;
351	<	procedure Disconnect; virtual;
352	<	function ConstraintsStored: Boolean;
353	<	procedure ClearCalcFields(Buffer: PChar); override;
354	<	function AllocRecordBuffer: PChar; override;
355	<	procedure DoBeforeDelete; override;
356	<	procedure DoBeforeEdit; override;
357	<	procedure DoBeforeInsert; override;
358	<	procedure DoAfterInsert; override;
359	<	procedure DoBeforePost; override;
360	<	procedure FreeRecordBuffer(var Buffer: PChar); override;
361	<	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
362	<	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
363	<	function GetCanModify: Boolean; override;
364	<	function GetDataSource: TDataSource; override;
365	<	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
366	<	function GetRecNo: Integer; override;
367	<	function GetRecord(Buffer: PChar; GetMode: TGetMode;
368	<	DoCheck: Boolean): TGetResult; override;
369	<	function GetRecordCount: Integer; override;
370	<	function GetRecordSize: Word; override;
371	<	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
372	<	procedure InternalCancel; override;
373	<	procedure InternalClose; override;
374	<	procedure InternalDelete; override;
375	<	procedure InternalFirst; override;
376	<	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
377	<	procedure InternalGotoBookmark(Bookmark: Pointer); override;
378	<	procedure InternalHandleException; override;
379	<	procedure InternalInitFieldDefs; override;
380	<	procedure InternalInitRecord(Buffer: PChar); override;
381	<	procedure InternalLast; override;
382	<	procedure InternalOpen; override;
383	<	procedure InternalPost; override;
384	<	procedure InternalRefresh; override;
385	<	procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
386	<	procedure InternalSetToRecord(Buffer: PChar); override;
387	<	function IsCursorOpen: Boolean; override;
388	<	procedure ReQuery;
389	<	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
390	<	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
391	<	procedure SetCachedUpdates(Value: Boolean);
392	<	procedure SetDataSource(Value: TDataSource);
393	<	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
394	<	procedure SetFieldData(Field : TField; Buffer : Pointer;
395	<	NativeFormat : Boolean); overload; override;
396	<	procedure SetRecNo(Value: Integer); override;
397	<
398	<	protected
399	<	{Likely to be made public by descendant classes}
400	<	property SQLParams: TIBXSQLDA read GetSQLParams;
401	<	property Params: TIBXSQLDA read GetSQLParams;
402	<	property InternalPrepared: Boolean read FInternalPrepared;
403	<	property QDelete: TIBSQL read FQDelete;
404	<	property QInsert: TIBSQL read FQInsert;
405	<	property QRefresh: TIBSQL read FQRefresh;
406	<	property QSelect: TIBSQL read FQSelect;
407	<	property QModify: TIBSQL read FQModify;
408	<	property StatementType: TIBSQLTypes read GetStatementType;
409	<	property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle;
410	<
411	<	{Likely to be made published by descendant classes}
412	<	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
413	<	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
414	<	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
415	<	property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
416	<	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
417	<	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
418	<	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
419	<	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
420	<	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
421	<	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
422	<	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
423	<
424	<	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
425	<	write FBeforeDatabaseDisconnect;
426	<	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
427	<	write FAfterDatabaseDisconnect;
428	<	property DatabaseFree: TNotifyEvent read FDatabaseFree
429	<	write FDatabaseFree;
430	<	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
431	<	write FBeforeTransactionEnd;
432	<	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
433	<	write FAfterTransactionEnd;
434	<	property TransactionFree: TNotifyEvent read FTransactionFree
435	<	write FTransactionFree;
436	<
437	<	public
438	<	constructor Create(AOwner: TComponent); override;
439	<	destructor Destroy; override;
440	<	procedure ApplyUpdates;
441	<	function CachedUpdateStatus: TCachedUpdateStatus;
442	<	procedure CancelUpdates;
443	<	procedure FetchAll;
444	<	function LocateNext(const KeyFields: string; const KeyValues: Variant;
445	<	Options: TLocateOptions): Boolean;
446	<	procedure RecordModified(Value: Boolean);
447	<	procedure RevertRecord;
448	<	procedure Undelete;
449	<
450	<	{ TDataSet support methods }
451	<	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
452	<	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
453	<	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
454	<	function GetCurrentRecord(Buffer: PChar): Boolean; override;
455	<	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
456	<	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
457	<	function GetFieldData(Field : TField; Buffer : Pointer;
458	<	NativeFormat : Boolean) : Boolean; overload; override;
459	<	function Locate(const KeyFields: string; const KeyValues: Variant;
460	<	Options: TLocateOptions): Boolean; override;
461	<	function Lookup(const KeyFields: string; const KeyValues: Variant;
462	<	const ResultFields: string): Variant; override;
463	<	function UpdateStatus: TUpdateStatus; override;
464	<	function IsSequenced: Boolean; override;
465	<	function ParamByName(ParamName: String): TIBXSQLVAR;
466	<	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
467	<	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
468	<	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
469	<	property UpdatesPending: Boolean read FUpdatesPending;
470	<	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
471	<	write SetUpdateRecordTypes;
472	<
473	<	published
474	<	property Database: TIBDatabase read GetDatabase write SetDatabase;
475	<	property Transaction: TIBTransaction read GetTransaction
476	<	write SetTransaction;
477	<	property ForcedRefresh: Boolean read FForcedRefresh
478	<	write FForcedRefresh default False;
479	<	property AutoCalcFields;
480	<
481	<	property AfterCancel;
482	<	property AfterClose;
483	<	property AfterDelete;
484	<	property AfterEdit;
485	<	property AfterInsert;
486	<	property AfterOpen;
487	<	property AfterPost;
488	<	property AfterRefresh;
489	<	property AfterScroll;
490	<	property BeforeCancel;
491	<	property BeforeClose;
492	<	property BeforeDelete;
493	<	property BeforeEdit;
494	<	property BeforeInsert;
495	<	property BeforeOpen;
496	<	property BeforePost;
497	<	property BeforeRefresh;
498	<	property BeforeScroll;
499	<	property OnCalcFields;
500	<	property OnDeleteError;
501	<	property OnEditError;
502	<	property OnNewRecord;
503	<	property OnPostError;
504	<	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
505	<	write FOnUpdateError;
506	<	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
507	<	write FOnUpdateRecord;
508	<	end;
509	<
510	<	TIBDataSet = class(TIBCustomDataSet)
511	<	private
512	<	function GetPrepared: Boolean;
513	<
514	<	protected
515	<	procedure SetFiltered(Value: Boolean); override;
516	<	procedure InternalOpen; override;
517	<
518	<	public
519	<	procedure Prepare;
520	<	procedure UnPrepare;
521	<	procedure BatchInput(InputObject: TIBBatchInput);
522	<	procedure BatchOutput(OutputObject: TIBBatchOutput);
523	<	procedure ExecSQL;
524	<
525	<	public
526	<	property Params;
527	<	property Prepared : Boolean read GetPrepared;
528	<	property QDelete;
529	<	property QInsert;
530	<	property QRefresh;
531	<	property QSelect;
532	<	property QModify;
533	<	property StatementType;
534	<	property SelectStmtHandle;
535	<
536	<	published
537	<	{ TIBCustomDataSet }
538	<	property BufferChunks;
539	<	property CachedUpdates;
540	<	property DeleteSQL;
541	<	property InsertSQL;
542	<	property RefreshSQL;
543	<	property SelectSQL;
544	<	property ModifySQL;
545	<	property GeneratorField;
546	<	property ParamCheck;
547	<	property UniDirectional;
548	<	property Filtered;
549	<
550	<	property BeforeDatabaseDisconnect;
551	<	property AfterDatabaseDisconnect;
552	<	property DatabaseFree;
553	<	property BeforeTransactionEnd;
554	<	property AfterTransactionEnd;
555	<	property TransactionFree;
556	<
557	<	{ TIBDataSet }
558	<	property Active;
559	<	property AutoCalcFields;
560	<	property DataSource read GetDataSource write SetDataSource;
561	<
562	<	property AfterCancel;
563	<	property AfterClose;
564	<	property AfterDelete;
565	<	property AfterEdit;
566	<	property AfterInsert;
567	<	property AfterOpen;
568	<	property AfterPost;
569	<	property AfterScroll;
570	<	property BeforeCancel;
571	<	property BeforeClose;
572	<	property BeforeDelete;
573	<	property BeforeEdit;
574	<	property BeforeInsert;
575	<	property BeforeOpen;
576	<	property BeforePost;
577	<	property BeforeScroll;
578	<	property OnCalcFields;
579	<	property OnDeleteError;
580	<	property OnEditError;
581	<	property OnFilterRecord;
582	<	property OnNewRecord;
583	<	property OnPostError;
584	<	end;
585	<
586	<	{ TIBDSBlobStream }
587	<	TIBDSBlobStream = class(TStream)
588	<	protected
589	<	FField: TField;
590	<	FBlobStream: TIBBlobStream;
591	<	public
592	<	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
593	<	Mode: TBlobStreamMode);
594	<	function Read(var Buffer; Count: Longint): Longint; override;
595	<	function Seek(Offset: Longint; Origin: Word): Longint; override;
596	<	procedure SetSize(NewSize: Longint); override;
597	<	function Write(const Buffer; Count: Longint): Longint; override;
598	<	end;
599	<
600	<	const
601	<	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
602	<	nil,                { ftUnknown }
603	<	TIBStringField,     { ftString }
604	<	TSmallintField,     { ftSmallint }
605	<	TIntegerField,      { ftInteger }
606	<	TWordField,         { ftWord }
607	<	TBooleanField,      { ftBoolean }
608	<	TFloatField,        { ftFloat }
609	<	TCurrencyField,     { ftCurrency }
610	<	TIBBCDField,        { ftBCD }
611	<	TDateField,         { ftDate }
612	<	TTimeField,         { ftTime }
613	<	TDateTimeField,     { ftDateTime }
614	<	TBytesField,        { ftBytes }
615	<	TVarBytesField,     { ftVarBytes }
616	<	TAutoIncField,      { ftAutoInc }
617	<	TBlobField,         { ftBlob }
618	<	TMemoField,         { ftMemo }
619	<	TGraphicField,      { ftGraphic }
620	<	TBlobField,         { ftFmtMemo }
621	<	TBlobField,         { ftParadoxOle }
622	<	TBlobField,         { ftDBaseOle }
623	<	TBlobField,         { ftTypedBinary }
624	<	nil,                { ftCursor }
625	<	TStringField,       { ftFixedChar }
626	<	TWideStringField,    { ftWideString }
627	<	TLargeIntField,     { ftLargeInt }
628	<	nil,          { ftADT }
629	<	nil,        { ftArray }
630	<	nil,    { ftReference }
631	<	nil,     { ftDataSet }
632	<	TBlobField,         { ftOraBlob }
633	<	TMemoField,         { ftOraClob }
634	<	TVariantField,      { ftVariant }
635	<	nil,    { ftInterface }
636	<	nil,     { ftIDispatch }
637	<	TGuidField,        { ftGuid }
638	<	TDateTimeField,    {ftTimestamp}
639	<	TIBBCDField,       {ftFMTBcd}
640	<	nil,  {ftFixedWideChar}
641	<	TWideMemoField);   {ftWideMemo}
642	<	(*
643	<	TADTField,          { ftADT }
644	<	TArrayField,        { ftArray }
645	<	TReferenceField,    { ftReference }
646	<	TDataSetField,     { ftDataSet }
647	<	TBlobField,         { ftOraBlob }
648	<	TMemoField,         { ftOraClob }
649	<	TVariantField,      { ftVariant }
650	<	TInterfaceField,    { ftInterface }
651	<	TIDispatchField,     { ftIDispatch }
652	<	TGuidField);        { ftGuid } *)
653	<	(*var
654	<	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
655	<
656	<	implementation
657	<
658	<	uses IBIntf, Variants, FmtBCD;
659	<
660	<	const FILE_BEGIN = 0;
661	<	FILE_CURRENT = 1;
662	<	FILE_END = 2;
663	<
664	<	type
665	<
666	<	TFieldNode = class(TObject)
667	<	protected
668	<	FieldName : String;
669	<	COMPUTED_BLR : Boolean;
670	<	DEFAULT_VALUE : boolean;
671	<	NextField : TFieldNode;
672	<	end;
673	<
674	<	TRelationNode = class(TObject)
675	<	protected
676	<	RelationName : String;
677	<	FieldNodes : TFieldNode;
678	<	NextRelation : TRelationNode;
679	<	end;
680	<
681	<
682	<	{ TIBStringField}
683	<
684	<	constructor TIBStringField.Create(AOwner: TComponent);
685	<	begin
686	<	inherited Create(AOwner);
687	<	end;
688	<
689	<	class procedure TIBStringField.CheckTypeSize(Value: Integer);
690	<	begin
691	<	{ don't check string size. all sizes valid }
692	<	end;
693	<
694	<	function TIBStringField.GetAsString: string;
695	<	begin
696	<	if not GetValue(Result) then Result := '';
697	<	end;
698	<
699	<	function TIBStringField.GetAsVariant: Variant;
700	<	var
701	<	S: string;
702	<	begin
703	<	if GetValue(S) then Result := S else Result := Null;
704	<	end;
705	<
706	<	function TIBStringField.GetValue(var Value: string): Boolean;
707	<	var
708	<	Buffer: PChar;
709	<	begin
710	<	Buffer := nil;
711	<	IBAlloc(Buffer, 0, Size + 1);
712	<	try
713	<	Result := GetData(Buffer);
714	<	if Result then
715	<	begin
716	<	Value := string(Buffer);
717	<	if Transliterate and (Value <> '') then
718	<	DataSet.Translate(PChar(Value), PChar(Value), False);
719	<	end
720	<	finally
721	<	FreeMem(Buffer);
722	<	end;
723	<	end;
724	<
725	<	procedure TIBStringField.SetAsString(const Value: string);
726	<	var
727	<	Buffer: PChar;
728	<	begin
729	<	Buffer := nil;
730	<	IBAlloc(Buffer, 0, Size + 1);
731	<	try
732	<	StrLCopy(Buffer, PChar(Value), Size);
733	<	if Transliterate then
734	<	DataSet.Translate(Buffer, Buffer, True);
735	<	SetData(Buffer);
736	<	finally
737	<	FreeMem(Buffer);
738	<	end;
739	<	end;
740	<
741	<	{ TIBBCDField }
742	<
743	<	constructor TIBBCDField.Create(AOwner: TComponent);
744	<	begin
745	<	inherited Create(AOwner);
746	<	SetDataType(ftBCD);
747	<	Size := 8;
748	<	end;
749	<
750	<	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
751	<	begin
752	<	{ No need to check as the base type is currency, not BCD }
753	<	end;
754	<
755	<	function TIBBCDField.GetAsCurrency: Currency;
756	<	begin
757	<	if not GetValue(Result) then
758	<	Result := 0;
759	<	end;
760	<
761	<	function TIBBCDField.GetAsString: string;
762	<	var
763	<	C: System.Currency;
764	<	begin
765	<	if GetValue(C) then
766	<	Result := CurrToStr(C)
767	<	else
768	<	Result := '';
769	<	end;
770	<
771	<	function TIBBCDField.GetAsVariant: Variant;
772	<	var
773	<	C: System.Currency;
774	<	begin
775	<	if GetValue(C) then
776	<	Result := C
777	<	else
778	<	Result := Null;
779	<	end;
780	<
781	<	function TIBBCDField.GetDataSize: Integer;
782	<	begin
783	<	{$IFDEF TBCDFIELD_IS_BCD}
784	<	Result := 8;
785	<	{$ELSE}
786	<	Result := inherited GetDataSize
787	<	{$ENDIF}
788	<	end;
789	<
790	<	{ TIBDataLink }
791	<
792	<	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
793	<	begin
794	<	inherited Create;
795	<	FDataSet := ADataSet;
796	<	end;
797	<
798	<	destructor TIBDataLink.Destroy;
799	<	begin
800	<	FDataSet.FDataLink := nil;
801	<	inherited Destroy;
802	<	end;
803	<
804	<
805	<	procedure TIBDataLink.ActiveChanged;
806	<	begin
807	<	if FDataSet.Active then
808	<	FDataSet.RefreshParams;
809	<	end;
810	<
811	<
812	<	function TIBDataLink.GetDetailDataSet: TDataSet;
813	<	begin
814	<	Result := FDataSet;
815	<	end;
816	<
817	<	procedure TIBDataLink.RecordChanged(Field: TField);
818	<	begin
819	<	if (Field = nil) and FDataSet.Active then
820	<	FDataSet.RefreshParams;
821	<	end;
822	<
823	<	procedure TIBDataLink.CheckBrowseMode;
824	<	begin
825	<	if FDataSet.Active then
826	<	FDataSet.CheckBrowseMode;
827	<	end;
828	<
829	<	{ TIBCustomDataSet }
830	<
831	<	constructor TIBCustomDataSet.Create(AOwner: TComponent);
832	<	begin
833	<	inherited Create(AOwner);
834	<	FIBLoaded := False;
835	<	CheckIBLoaded;
836	<	FIBLoaded := True;
837	<	FBase := TIBBase.Create(Self);
838	<	FCurrentRecord := -1;
839	<	FDeletedRecords := 0;
840	<	FUniDirectional := False;
841	<	FBufferChunks := BufferCacheSize;
842	<	FBlobStreamList := TList.Create;
843	<	FGeneratorField := TIBGenerator.Create(self);
844	<	FDataLink := TIBDataLink.Create(Self);
845	<	FQDelete := TIBSQL.Create(Self);
846	<	FQDelete.OnSQLChanging := SQLChanging;
847	<	FQDelete.GoToFirstRecordOnExecute := False;
848	<	FQInsert := TIBSQL.Create(Self);
849	<	FQInsert.OnSQLChanging := SQLChanging;
850	<	FQInsert.GoToFirstRecordOnExecute := False;
851	<	FQRefresh := TIBSQL.Create(Self);
852	<	FQRefresh.OnSQLChanging := SQLChanging;
853	<	FQRefresh.GoToFirstRecordOnExecute := False;
854	<	FQSelect := TIBSQL.Create(Self);
855	<	FQSelect.OnSQLChanging := SQLChanging;
856	<	FQSelect.GoToFirstRecordOnExecute := False;
857	<	FQModify := TIBSQL.Create(Self);
858	<	FQModify.OnSQLChanging := SQLChanging;
859	<	FQModify.GoToFirstRecordOnExecute := False;
860	<	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
861	<	FParamCheck := True;
862	<	FForcedRefresh := False;
863	<	{Bookmark Size is Integer for IBX}
864	<	BookmarkSize := SizeOf(Integer);
865	<	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
866	<	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
867	<	FBase.OnDatabaseFree := DoDatabaseFree;
868	<	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
869	<	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
870	<	FBase.OnTransactionFree := DoTransactionFree;
871	<	if AOwner is TIBDatabase then
872	<	Database := TIBDatabase(AOwner)
873	<	else
874	<	if AOwner is TIBTransaction then
875	<	Transaction := TIBTransaction(AOwner);
876	<	end;
877	<
878	<	destructor TIBCustomDataSet.Destroy;
879	<	begin
880	<	if Active then Active := false;
881	<	if FIBLoaded then
882	<	begin
883	<	if assigned(FGeneratorField) then FGeneratorField.Free;
884	<	FDataLink.Free;
885	<	FBase.Free;
886	<	ClearBlobCache;
887	<	FBlobStreamList.Free;
888	<	FreeMem(FBufferCache);
889	<	FBufferCache := nil;
890	<	FreeMem(FOldBufferCache);
891	<	FOldBufferCache := nil;
892	<	FCacheSize := 0;
893	<	FOldCacheSize := 0;
894	<	FMappedFieldPosition := nil;
895	<	end;
896	<	inherited Destroy;
897	<	end;
898	<
899	<	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
900	<	TGetResult;
901	<	begin
902	<	while not IsVisible(Buffer) do
903	<	begin
904	<	if GetMode = gmPrior then
905	<	begin
906	<	Dec(FCurrentRecord);
907	<	if FCurrentRecord = -1 then
908	<	begin
909	<	result := grBOF;
910	<	exit;
911	<	end;
912	<	ReadRecordCache(FCurrentRecord, Buffer, False);
913	<	end
914	<	else begin
915	<	Inc(FCurrentRecord);
916	<	if (FCurrentRecord = FRecordCount) then
917	<	begin
918	<	if (not FQSelect.EOF) and (FQSelect.Next <> nil) then
919	<	begin
920	<	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
921	<	Inc(FRecordCount);
922	<	end
923	<	else begin
924	<	result := grEOF;
925	<	exit;
926	<	end;
927	<	end
928	<	else
929	<	ReadRecordCache(FCurrentRecord, Buffer, False);
930	<	end;
931	<	end;
932	<	result := grOK;
933	<	end;
934	<
935	<	procedure TIBCustomDataSet.ApplyUpdates;
936	<	var
937	<	{$IF FPC_FULLVERSION > 20602 }
938	<	CurBookmark: TBookmark;
939	<	{$ELSE}
940	<	CurBookmark: string;
941	<	{$ENDIF}
942	<	Buffer: PRecordData;
943	<	CurUpdateTypes: TIBUpdateRecordTypes;
944	<	UpdateAction: TIBUpdateAction;
945	<	UpdateKind: TUpdateKind;
946	<	bRecordsSkipped: Boolean;
947	<
948	<	procedure GetUpdateKind;
949	<	begin
950	<	case Buffer^.rdCachedUpdateStatus of
951	<	cusModified:
952	<	UpdateKind := ukModify;
953	<	cusInserted:
954	<	UpdateKind := ukInsert;
955	<	else
956	<	UpdateKind := ukDelete;
957	<	end;
958	<	end;
959	<
960	<	procedure ResetBufferUpdateStatus;
961	<	begin
962	<	case Buffer^.rdCachedUpdateStatus of
963	<	cusModified:
964	<	begin
965	<	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
966	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
967	<	end;
968	<	cusInserted:
969	<	begin
970	<	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
971	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
972	<	end;
973	<	cusDeleted:
974	<	begin
975	<	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
976	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
977	<	end;
978	<	end;
979	<	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
980	<	end;
981	<
982	<	procedure UpdateUsingOnUpdateRecord;
983	<	begin
984	<	UpdateAction := uaFail;
985	<	try
986	<	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
987	<	except
988	<	on E: Exception do
989	<	begin
990	<	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
991	<	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
992	<	if UpdateAction = uaFail then
993	<	raise;
994	<	end;
995	<	end;
996	<	end;
997	<
998	<	procedure UpdateUsingUpdateObject;
999	<	begin
1000	<	try
1001	<	FUpdateObject.Apply(UpdateKind,PChar(Buffer));
1002	<	ResetBufferUpdateStatus;
1003	<	except
1004	<	on E: Exception do
1005	<	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1006	<	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1007	<	end;
1008	<	end;
1009	<
1010	<	procedure UpdateUsingInternalquery;
1011	<	begin
1012	<	try
1013	<	case Buffer^.rdCachedUpdateStatus of
1014	<	cusModified:
1015	<	InternalPostRecord(FQModify, Buffer);
1016	<	cusInserted:
1017	<	InternalPostRecord(FQInsert, Buffer);
1018	<	cusDeleted:
1019	<	InternalDeleteRecord(FQDelete, Buffer);
1020	<	end;
1021	<	except
1022	<	on E: EIBError do begin
1023	<	UpdateAction := uaFail;
1024	<	if Assigned(FOnUpdateError) then
1025	<	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
1026	<	case UpdateAction of
1027	<	uaFail: raise;
1028	<	uaAbort: SysUtils.Abort;
1029	<	uaSkip: bRecordsSkipped := True;
1030	<	end;
1031	<	end;
1032	<	end;
1033	<	end;
1034	<
1035	<	begin
1036	<	if State in [dsEdit, dsInsert] then
1037	<	Post;
1038	<	FBase.CheckDatabase;
1039	<	FBase.CheckTransaction;
1040	<	DisableControls;
1041	<	CurBookmark := Bookmark;
1042	<	CurUpdateTypes := FUpdateRecordTypes;
1043	<	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1044	<	try
1045	<	First;
1046	<	bRecordsSkipped := False;
1047	<	while not EOF do
1048	<	begin
1049	<	Buffer := PRecordData(GetActiveBuf);
1050	<	GetUpdateKind;
1051	<	UpdateAction := uaApply;
1052	<	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
1053	<	begin
1054	<	if (Assigned(FOnUpdateRecord)) then
1055	<	UpdateUsingOnUpdateRecord
1056	<	else
1057	<	if Assigned(FUpdateObject) then
1058	<	UpdateUsingUpdateObject;
1059	<	case UpdateAction of
1060	<	uaFail:
1061	<	IBError(ibxeUserAbort, [nil]);
1062	<	uaAbort:
1063	<	SysUtils.Abort;
1064	<	uaApplied:
1065	<	ResetBufferUpdateStatus;
1066	<	uaSkip:
1067	<	bRecordsSkipped := True;
1068	<	uaRetry:
1069	<	Continue;
1070	<	end;
1071	<	end;
1072	<	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
1073	<	begin
1074	<	UpdateUsingInternalquery;
1075	<	UpdateAction := uaApplied;
1076	<	end;
1077	<	Next;
1078	<	end;
1079	<	FUpdatesPending := bRecordsSkipped;
1080	<	finally
1081	<	FUpdateRecordTypes := CurUpdateTypes;
1082	<	Bookmark := CurBookmark;
1083	<	EnableControls;
1084	<	end;
1085	<	end;
1086	<
1087	<	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1088	<	begin
1089	<	FQSelect.BatchInput(InputObject);
1090	<	end;
1091	<
1092	<	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1093	<	var
1094	<	Qry: TIBSQL;
1095	<	begin
1096	<	Qry := TIBSQL.Create(Self);
1097	<	try
1098	<	Qry.Database := FBase.Database;
1099	<	Qry.Transaction := FBase.Transaction;
1100	<	Qry.SQL.Assign(FQSelect.SQL);
1101	<	Qry.BatchOutput(OutputObject);
1102	<	finally
1103	<	Qry.Free;
1104	<	end;
1105	<	end;
1106	<
1107	<	procedure TIBCustomDataSet.CancelUpdates;
1108	<	var
1109	<	CurUpdateTypes: TIBUpdateRecordTypes;
1110	<	begin
1111	<	if State in [dsEdit, dsInsert] then
1112	<	Post;
1113	<	if FCachedUpdates and FUpdatesPending then
1114	<	begin
1115	<	DisableControls;
1116	<	CurUpdateTypes := UpdateRecordTypes;
1117	<	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1118	<	try
1119	<	First;
1120	<	while not EOF do
1121	<	begin
1122	<	if UpdateStatus = usInserted then
1123	<	RevertRecord
1124	<	else
1125	<	begin
1126	<	RevertRecord;
1127	<	Next;
1128	<	end;
1129	<	end;
1130	<	finally
1131	<	UpdateRecordTypes := CurUpdateTypes;
1132	<	First;
1133	<	FUpdatesPending := False;
1134	<	EnableControls;
1135	<	end;
1136	<	end;
1137	<	end;
1138	<
1139	<	procedure TIBCustomDataSet.ActivateConnection;
1140	<	begin
1141	<	if not Assigned(Database) then
1142	<	IBError(ibxeDatabaseNotAssigned, [nil]);
1143	<	if not Assigned(Transaction) then
1144	<	IBError(ibxeTransactionNotAssigned, [nil]);
1145	<	if not Database.Connected then Database.Open;
1146	<	end;
1147	<
1148	<	function TIBCustomDataSet.ActivateTransaction: Boolean;
1149	<	begin
1150	<	Result := False;
1151	<	if not Assigned(Transaction) then
1152	<	IBError(ibxeTransactionNotAssigned, [nil]);
1153	<	if not Transaction.Active then
1154	<	begin
1155	<	Result := True;
1156	<	Transaction.StartTransaction;
1157	<	FDidActivate := True;
1158	<	end;
1159	<	end;
1160	<
1161	<	procedure TIBCustomDataSet.DeactivateTransaction;
1162	<	var
1163	<	i: Integer;
1164	<	begin
1165	<	if not Assigned(Transaction) then
1166	<	IBError(ibxeTransactionNotAssigned, [nil]);
1167	<	with Transaction do
1168	<	begin
1169	<	for i := 0 to SQLObjectCount - 1 do
1170	<	begin
1171	<	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1172	<	begin
1173	<	if TDataSet(SQLObjects[i].owner).Active then
1174	<	begin
1175	<	FDidActivate := False;
1176	<	exit;
1177	<	end;
1178	<	end;
1179	<	end;
1180	<	end;
1181	<	FInternalPrepared := False;
1182	<	if Transaction.InTransaction then
1183	<	Transaction.Commit;
1184	<	FDidActivate := False;
1185	<	end;
1186	<
1187	<	procedure TIBCustomDataSet.CheckDatasetClosed;
1188	<	begin
1189	<	if FOpen then
1190	<	IBError(ibxeDatasetOpen, [nil]);
1191	<	end;
1192	<
1193	<	procedure TIBCustomDataSet.CheckDatasetOpen;
1194	<	begin
1195	<	if not FOpen then
1196	<	IBError(ibxeDatasetClosed, [nil]);
1197	<	end;
1198	<
1199	<	procedure TIBCustomDataSet.CheckNotUniDirectional;
1200	<	begin
1201	<	if UniDirectional then
1202	<	IBError(ibxeDataSetUniDirectional, [nil]);
1203	<	end;
1204	<
1205	<	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1206	<	begin
1207	<	with PRecordData(Buffer)^ do
1208	<	if (State = dsInsert) and (not Modified) then
1209	<	begin
1210	<	rdRecordNumber := FRecordCount;
1211	<	FCurrentRecord := FRecordCount;
1212	<	end;
1213	<	end;
1214	<
1215	<	function TIBCustomDataSet.CanEdit: Boolean;
1216	<	var
1217	<	Buff: PRecordData;
1218	<	begin
1219	<	Buff := PRecordData(GetActiveBuf);
1220	<	result := (FQModify.SQL.Text <> '') or
1221	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1222	<	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1223	<	(FCachedUpdates));
1224	<	end;
1225	<
1226	<	function TIBCustomDataSet.CanInsert: Boolean;
1227	<	begin
1228	<	result := (FQInsert.SQL.Text <> '') or
1229	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1230	<	end;
1231	<
1232	<	function TIBCustomDataSet.CanDelete: Boolean;
1233	<	begin
1234	<	if (FQDelete.SQL.Text <> '') or
1235	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1236	<	result := True
1237	<	else
1238	<	result := False;
1239	<	end;
1240	<
1241	<	function TIBCustomDataSet.CanRefresh: Boolean;
1242	<	begin
1243	<	result := (FQRefresh.SQL.Text <> '') or
1244	<	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1245	<	end;
1246	<
1247	<	procedure TIBCustomDataSet.CheckEditState;
1248	<	begin
1249	<	case State of
1250	<	{ Check all the wsEditMode types }
1251	<	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1252	<	dsNewValue, dsInternalCalc :
1253	<	begin
1254	<	if (State in [dsEdit]) and (not CanEdit) then
1255	<	IBError(ibxeCannotUpdate, [nil]);
1256	<	if (State in [dsInsert]) and (not CanInsert) then
1257	<	IBError(ibxeCannotInsert, [nil]);
1258	<	end;
1259	<	else
1260	<	IBError(ibxeNotEditing, [])
1261	<	end;
1262	<	end;
1263	<
1264	<	procedure TIBCustomDataSet.ClearBlobCache;
1265	<	var
1266	<	i: Integer;
1267	<	begin
1268	<	for i := 0 to FBlobStreamList.Count - 1 do
1269	<	begin
1270	<	TIBBlobStream(FBlobStreamList[i]).Free;
1271	<	FBlobStreamList[i] := nil;
1272	<	end;
1273	<	FBlobStreamList.Pack;
1274	<	end;
1275	<
1276	<	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1277	<	begin
1278	<	Move(Source^, Dest^, FRecordBufferSize);
1279	<	end;
1280	<
1281	<	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1282	<	begin
1283	<	if Active then
1284	<	Active := False;
1285	<	FInternalPrepared := False;
1286	<	if Assigned(FBeforeDatabaseDisconnect) then
1287	<	FBeforeDatabaseDisconnect(Sender);
1288	<	end;
1289	<
1290	<	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1291	<	begin
1292	<	if Assigned(FAfterDatabaseDisconnect) then
1293	<	FAfterDatabaseDisconnect(Sender);
1294	<	end;
1295	<
1296	<	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1297	<	begin
1298	<	if Assigned(FDatabaseFree) then
1299	<	FDatabaseFree(Sender);
1300	<	end;
1301	<
1302	<	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject);
1303	<	begin
1304	<	if Active then
1305	<	Active := False;
1306	<	if FQSelect <> nil then
1307	<	FQSelect.FreeHandle;
1308	<	if FQDelete <> nil then
1309	<	FQDelete.FreeHandle;
1310	<	if FQInsert <> nil then
1311	<	FQInsert.FreeHandle;
1312	<	if FQModify <> nil then
1313	<	FQModify.FreeHandle;
1314	<	if FQRefresh <> nil then
1315	<	FQRefresh.FreeHandle;
1316	<	if Assigned(FBeforeTransactionEnd) then
1317	<	FBeforeTransactionEnd(Sender);
1318	<	end;
1319	<
1320	<	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1321	<	begin
1322	<	if Assigned(FAfterTransactionEnd) then
1323	<	FAfterTransactionEnd(Sender);
1324	<	end;
1325	<
1326	<	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1327	<	begin
1328	<	if Assigned(FTransactionFree) then
1329	<	FTransactionFree(Sender);
1330	<	end;
1331	<
1332	<	{ Read the record from FQSelect.Current into the record buffer
1333	<	Then write the buffer to in memory cache }
1334	<	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
1335	<	RecordNumber: Integer; Buffer: PChar);
1336	<	var
1337	<	p: PRecordData;
1338	<	pbd: PBlobDataArray;
1339	<	i, j: Integer;
1340	<	LocalData: Pointer;
1341	<	LocalDate, LocalDouble: Double;
1342	<	LocalInt: Integer;
1343	<	LocalInt64: Int64;
1344	<	LocalCurrency: Currency;
1345	<	FieldsLoaded: Integer;
1346	<	temp: TIBXSQLVAR;
1347	<	begin
1348	<	p := PRecordData(Buffer);
1349	<	{ Make sure blob cache is empty }
1350	<	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
1351	<	if RecordNumber > -1 then
1352	<	for i := 0 to BlobFieldCount - 1 do
1353	<	pbd^[i] := nil;
1354	<	{ Get record information }
1355	<	p^.rdBookmarkFlag := bfCurrent;
1356	<	p^.rdFieldCount := Qry.Current.Count;
1357	<	p^.rdRecordNumber := RecordNumber;
1358	<	p^.rdUpdateStatus := usUnmodified;
1359	<	p^.rdCachedUpdateStatus := cusUnmodified;
1360	<	p^.rdSavedOffset := $FFFFFFFF;
1361	<
1362	<	{ Load up the fields }
1363	<	FieldsLoaded := FQSelect.Current.Count;
1364	<	j := 1;
1365	<	for i := 0 to Qry.Current.Count - 1 do
1366	<	begin
1367	<	if (Qry = FQSelect) then
1368	<	j := i + 1
1369	<	else begin
1370	<	if FieldsLoaded = 0 then
1371	<	break;
1372	<	j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1;
1373	<	if j < 1 then
1374	<	continue
1375	<	else
1376	<	Dec(FieldsLoaded);
1377	<	end;
1378	<	with FQSelect.Current[j - 1].Data^ do
1379	<	if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
1380	<	begin
1381	<	if sqllen <= 8 then
1382	<	p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^;
1383	<	continue;
1384	<	end;
1385	<	if j > 0 then with p^ do
1386	<	begin
1387	<	rdFields[j].fdDataType :=
1388	<	Qry.Current[i].Data^.sqltype and (not 1);
1389	<	rdFields[j].fdDataScale :=
1390	<	Qry.Current[i].Data^.sqlscale;
1391	<	rdFields[j].fdNullable :=
1392	<	(Qry.Current[i].Data^.sqltype and 1 = 1);
1393	<	rdFields[j].fdIsNull :=
1394	<	(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1));
1395	<	LocalData := Qry.Current[i].Data^.sqldata;
1396	<	case rdFields[j].fdDataType of
1397	<	SQL_TIMESTAMP:
1398	<	begin
1399	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1400	<	if RecordNumber >= 0 then
1401	<	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime));
1402	<	LocalData := PChar(@LocalDate);
1403	<	end;
1404	<	SQL_TYPE_DATE:
1405	<	begin
1406	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1407	<	if RecordNumber >= 0 then
1408	<	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date;
1409	<	LocalData := PChar(@LocalInt);
1410	<	end;
1411	<	SQL_TYPE_TIME:
1412	<	begin
1413	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1414	<	if RecordNumber >= 0 then
1415	<	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time;
1416	<	LocalData := PChar(@LocalInt);
1417	<	end;
1418	<	SQL_SHORT, SQL_LONG:
1419	<	begin
1420	<	if (rdFields[j].fdDataScale = 0) then
1421	<	begin
1422	<	rdFields[j].fdDataSize := SizeOf(Integer);
1423	<	if RecordNumber >= 0 then
1424	<	LocalInt := Qry.Current[i].AsLong;
1425	<	LocalData := PChar(@LocalInt);
1426	<	end
1427	<	else if (rdFields[j].fdDataScale >= (-4)) then
1428	<	begin
1429	<	rdFields[j].fdDataSize := SizeOf(Currency);
1430	<	if RecordNumber >= 0 then
1431	<	LocalCurrency := Qry.Current[i].AsCurrency;
1432	<	LocalData := PChar(@LocalCurrency);
1433	<	end
1434	<	else begin
1435	<	rdFields[j].fdDataSize := SizeOf(Double);
1436	<	if RecordNumber >= 0 then
1437	<	LocalDouble := Qry.Current[i].AsDouble;
1438	<	LocalData := PChar(@LocalDouble);
1439	<	end;
1440	<	end;
1441	<	SQL_INT64:
1442	<	begin
1443	<	if (rdFields[j].fdDataScale = 0) then
1444	<	begin
1445	<	rdFields[j].fdDataSize := SizeOf(Int64);
1446	<	if RecordNumber >= 0 then
1447	<	LocalInt64 := Qry.Current[i].AsInt64;
1448	<	LocalData := PChar(@LocalInt64);
1449	<	end
1450	<	else if (rdFields[j].fdDataScale >= (-4)) then
1451	<	begin
1452	<	rdFields[j].fdDataSize := SizeOf(Currency);
1453	<	if RecordNumber >= 0 then
1454	<	LocalCurrency := Qry.Current[i].AsCurrency;
1455	<	LocalData := PChar(@LocalCurrency);
1456	<	end
1457	<	else begin
1458	<	rdFields[j].fdDataSize := SizeOf(Double);
1459	<	if RecordNumber >= 0 then
1460	<	LocalDouble := Qry.Current[i].AsDouble;
1461	<	LocalData := PChar(@LocalDouble);
1462	<	end
1463	<	end;
1464	<	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
1465	<	begin
1466	<	rdFields[j].fdDataSize := SizeOf(Double);
1467	<	if RecordNumber >= 0 then
1468	<	LocalDouble := Qry.Current[i].AsDouble;
1469	<	LocalData := PChar(@LocalDouble);
1470	<	end;
1471	<	SQL_VARYING:
1472	<	begin
1473	<	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1474	<	rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2);
1475	<	if RecordNumber >= 0 then
1476	<	begin
1477	<	if (rdFields[j].fdDataLength = 0) then
1478	<	LocalData := nil
1479	<	else
1480	<	begin
1481	<	temp :=  Qry.Current[i];
1482	<	LocalData := @temp.Data^.sqldata[2];
1483	<	(*              LocalData := @Qry.Current[i].Data^.sqldata[2];*)
1484	<	end;
1485	<	end;
1486	<	end;
1487	<	else { SQL_TEXT, SQL_BLOB, SQL_ARRAY, SQL_QUAD }
1488	<	begin
1489	<	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1490	<	if (rdFields[j].fdDataType = SQL_TEXT) then
1491	<	rdFields[j].fdDataLength := rdFields[j].fdDataSize;
1492	<	end;
1493	<	end;
1494	<	if RecordNumber < 0 then
1495	<	begin
1496	<	rdFields[j].fdIsNull := True;
1497	<	rdFields[j].fdDataOfs := FRecordSize;
1498	<	Inc(FRecordSize, rdFields[j].fdDataSize);
1499	<	end
1500	<	else begin
1501	<	if rdFields[j].fdDataType = SQL_VARYING then
1502	<	begin
1503	<	if LocalData <> nil then
1504	<	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength)
1505	<	end
1506	<	else
1507	<	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize)
1508	<	end;
1509	<	end;
1510	<	end;
1511	<	WriteRecordCache(RecordNumber, PChar(p));
1512	<	end;
1513	<
1514	<	function TIBCustomDataSet.GetActiveBuf: PChar;
1515	<	begin
1516	<	case State of
1517	<	dsBrowse:
1518	<	if IsEmpty then
1519	<	result := nil
1520	<	else
1521	<	result := ActiveBuffer;
1522	<	dsEdit, dsInsert:
1523	<	result := ActiveBuffer;
1524	<	dsCalcFields:
1525	<	result := CalcBuffer;
1526	<	dsFilter:
1527	<	result := FFilterBuffer;
1528	<	dsNewValue:
1529	<	result := ActiveBuffer;
1530	<	dsOldValue:
1531	<	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
1532	<	PRecordData(FOldBuffer)^.rdRecordNumber) then
1533	<	result := FOldBuffer
1534	<	else
1535	<	result := ActiveBuffer;
1536	<	else if not FOpen then
1537	<	result := nil
1538	<	else
1539	<	result := ActiveBuffer;
1540	<	end;
1541	<	end;
1542	<
1543	<	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
1544	<	begin
1545	<	if Active then
1546	<	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
1547	<	else
1548	<	result := cusUnmodified;
1549	<	end;
1550	<
1551	<	function TIBCustomDataSet.GetDatabase: TIBDatabase;
1552	<	begin
1553	<	result := FBase.Database;
1554	<	end;
1555	<
1556	<	function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE;
1557	<	begin
1558	<	result := FBase.DBHandle;
1559	<	end;
1560	<
1561	<	function TIBCustomDataSet.GetDeleteSQL: TStrings;
1562	<	begin
1563	<	result := FQDelete.SQL;
1564	<	end;
1565	<
1566	<	function TIBCustomDataSet.GetInsertSQL: TStrings;
1567	<	begin
1568	<	result := FQInsert.SQL;
1569	<	end;
1570	<
1571	<	function TIBCustomDataSet.GetSQLParams: TIBXSQLDA;
1572	<	begin
1573	<	if not FInternalPrepared then
1574	<	InternalPrepare;
1575	<	result := FQSelect.Params;
1576	<	end;
1577	<
1578	<	function TIBCustomDataSet.GetRefreshSQL: TStrings;
1579	<	begin
1580	<	result := FQRefresh.SQL;
1581	<	end;
1582	<
1583	<	function TIBCustomDataSet.GetSelectSQL: TStrings;
1584	<	begin
1585	<	result := FQSelect.SQL;
1586	<	end;
1587	<
1588	<	function TIBCustomDataSet.GetStatementType: TIBSQLTypes;
1589	<	begin
1590	<	result := FQSelect.SQLType;
1591	<	end;
1592	<
1593	<	function TIBCustomDataSet.GetModifySQL: TStrings;
1594	<	begin
1595	<	result := FQModify.SQL;
1596	<	end;
1597	<
1598	<	function TIBCustomDataSet.GetTransaction: TIBTransaction;
1599	<	begin
1600	<	result := FBase.Transaction;
1601	<	end;
1602	<
1603	<	function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE;
1604	<	begin
1605	<	result := FBase.TRHandle;
1606	<	end;
1607	<
1608	<	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
1609	<	begin
1610	<	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1611	<	FUpdateObject.Apply(ukDelete,Buff)
1612	<	else
1613	<	begin
1614	<	SetInternalSQLParams(FQDelete, Buff);
1615	<	FQDelete.ExecQuery;
1616	<	end;
1617	<	with PRecordData(Buff)^ do
1618	<	begin
1619	<	rdUpdateStatus := usDeleted;
1620	<	rdCachedUpdateStatus := cusUnmodified;
1621	<	end;
1622	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1623	<	end;
1624	<
1625	<	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
1626	<	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1627	<	var
1628	<	keyFieldList: TList;
1629	<	{$IF FPC_FULLVERSION >  20602 }
1630	<	CurBookmark: TBookmark;
1631	<	{$ELSE}
1632	<	CurBookmark: string;
1633	<	{$ENDIF}
1634	<	fieldValue: Variant;
1635	<	lookupValues: array of variant;
1636	<	i, fieldCount: Integer;
1637	<	fieldValueAsString: string;
1638	<	lookupValueAsString: string;
1639	<	begin
1640	<	keyFieldList := TList.Create;
1641	<	try
1642	<	GetFieldList(keyFieldList, KeyFields);
1643	<	fieldCount := keyFieldList.Count;
1644	<	CurBookmark := Bookmark;
1645	<	result := false;
1646	<	SetLength(lookupValues, fieldCount);
1647	<	if not EOF then
1648	<	begin
1649	<	for i := 0 to fieldCount - 1 do  {expand key values into lookupValues array}
1650	<	begin
1651	<	if VarIsArray(KeyValues) then
1652	<	lookupValues[i] := KeyValues[i]
1653	<	else
1654	<	if i > 0 then
1655	<	lookupValues[i] := NULL
1656	<	else
1657	<	lookupValues[0] := KeyValues;
1658	<
1659	<	{convert to upper case is case insensitive search}
1660	<	if (TField(keyFieldList[i]).DataType = ftString) and
1661	<	not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
1662	<	lookupValues[i] := UpperCase(lookupValues[i]);
1663	<	end;
1664	<	end;
1665	<	while not result and not EOF do   {search for a matching record}
1666	<	begin
1667	<	i := 0;
1668	<	result := true;
1669	<	while result and (i < fieldCount) do
1670	<	{see if all of the key fields matches}
1671	<	begin
1672	<	fieldValue := TField(keyFieldList[i]).Value;
1673	<	result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
1674	<	if result and not VarIsNull(fieldValue) then
1675	<	begin
1676	<	try
1677	<	if TField(keyFieldList[i]).DataType = ftString then
1678	<	begin
1679	<	{strings need special handling because of the locate options that
1680	<	apply to them}
1681	<	fieldValueAsString := TField(keyFieldList[i]).AsString;
1682	<	lookupValueAsString := lookupValues[i];
1683	<	if (loCaseInsensitive in Options) then
1684	<	fieldValueAsString := UpperCase(fieldValueAsString);
1685	<
1686	<	if (loPartialKey in Options) then
1687	<	result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
1688	<	else
1689	<	result := result and (fieldValueAsString = lookupValueAsString);
1690	<	end
1691	<	else
1692	<	result := result and (lookupValues[i] =
1693	<	VarAsType(fieldValue, VarType(lookupValues[i])));
1694	<	except on EVariantError do
1695	<	result := False;
1696	<	end;
1697	<	end;
1698	<	Inc(i);
1699	<	end;
1700	<	if not result then
1701	<	Next;
1702	<	end;
1703	<	if not result then
1704	<	Bookmark := CurBookmark
1705	<	else
1706	<	CursorPosChanged;
1707	<	finally
1708	<	keyFieldList.Free;
1709	<	SetLength(lookupValues,0)
1710	<	end;
1711	<	end;
1712	<
1713	<	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
1714	<	var
1715	<	i, j, k: Integer;
1716	<	pbd: PBlobDataArray;
1717	<	begin
1718	<	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
1719	<	j := 0;
1720	<	for i := 0 to FieldCount - 1 do
1721	<	if Fields[i].IsBlob then
1722	<	begin
1723	<	k := FMappedFieldPosition[Fields[i].FieldNo -1];
1724	<	if pbd^[j] <> nil then
1725	<	begin
1726	<	pbd^[j].Finalize;
1727	<	PISC_QUAD(
1728	<	PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ :=
1729	<	pbd^[j].BlobID;
1730	<	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
1731	<	end;
1732	<	Inc(j);
1733	<	end;
1734	<	if Assigned(FUpdateObject) then
1735	<	begin
1736	<	if (Qry = FQDelete) then
1737	<	FUpdateObject.Apply(ukDelete,Buff)
1738	<	else if (Qry = FQInsert) then
1739	<	FUpdateObject.Apply(ukInsert,Buff)
1740	<	else
1741	<	FUpdateObject.Apply(ukModify,Buff);
1742	<	end
1743	<	else begin
1744	<	SetInternalSQLParams(Qry, Buff);
1745	<	Qry.ExecQuery;
1746	<	end;
1747	<	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
1748	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
1749	<	SetModified(False);
1750	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1751	<	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
1752	<	InternalRefreshRow;
1753	<	end;
1754	<
1755	<	procedure TIBCustomDataSet.InternalRefreshRow;
1756	<	var
1757	<	Buff: PChar;
1758	<	SetCursor: Boolean;
1759	<	ofs: DWORD;
1760	<	Qry: TIBSQL;
1761	<	begin
1762	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1763	<	if SetCursor then
1764	<	Screen.Cursor := crHourGlass;
1765	<	try
1766	<	Buff := GetActiveBuf;
1767	<	if CanRefresh then
1768	<	begin
1769	<	if Buff <> nil then
1770	<	begin
1771	<	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
1772	<	begin
1773	<	Qry := TIBSQL.Create(self);
1774	<	Qry.Database := Database;
1775	<	Qry.Transaction := Transaction;
1776	<	Qry.GoToFirstRecordOnExecute := False;
1777	<	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
1778	<	end
1779	<	else
1780	<	Qry := FQRefresh;
1781	<	SetInternalSQLParams(Qry, Buff);
1782	<	Qry.ExecQuery;
1783	<	try
1784	<	if (Qry.SQLType = SQLExecProcedure) or
1785	<	(Qry.Next <> nil) then
1786	<	begin
1787	<	ofs := PRecordData(Buff)^.rdSavedOffset;
1788	<	FetchCurrentRecordToBuffer(Qry,
1789	<	PRecordData(Buff)^.rdRecordNumber,
1790	<	Buff);
1791	<	if FCachedUpdates and (ofs <> $FFFFFFFF) then
1792	<	begin
1793	<	PRecordData(Buff)^.rdSavedOffset := ofs;
1794	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1795	<	SaveOldBuffer(Buff);
1796	<	end;
1797	<	end;
1798	<	finally
1799	<	Qry.Close;
1800	<	end;
1801	<	if Qry <> FQRefresh then
1802	<	Qry.Free;
1803	<	end
1804	<	end
1805	<	else
1806	<	IBError(ibxeCannotRefresh, [nil]);
1807	<	finally
1808	<	if SetCursor and (Screen.Cursor = crHourGlass) then
1809	<	Screen.Cursor := crDefault;
1810	<	end;
1811	<	end;
1812	<
1813	<	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
1814	<	var
1815	<	NewBuffer, OldBuffer: PRecordData;
1816	<
1817	<	begin
1818	<	NewBuffer := nil;
1819	<	OldBuffer := nil;
1820	<	NewBuffer := PRecordData(AllocRecordBuffer);
1821	<	OldBuffer := PRecordData(AllocRecordBuffer);
1822	<	try
1823	<	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
1824	<	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
1825	<	case NewBuffer^.rdCachedUpdateStatus of
1826	<	cusInserted:
1827	<	begin
1828	<	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
1829	<	Inc(FDeletedRecords);
1830	<	end;
1831	<	cusModified,
1832	<	cusDeleted:
1833	<	begin
1834	<	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
1835	<	Dec(FDeletedRecords);
1836	<	CopyRecordBuffer(OldBuffer, NewBuffer);
1837	<	end;
1838	<	end;
1839	<
1840	<	if State in dsEditModes then
1841	<	Cancel;
1842	<
1843	<	WriteRecordCache(RecordNumber, PChar(NewBuffer));
1844	<
1845	<	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
1846	<	ReSync([]);
1847	<	finally
1848	<	FreeRecordBuffer(PChar(NewBuffer));
1849	<	FreeRecordBuffer(PChar(OldBuffer));
1850	<	end;
1851	<	end;
1852	<
1853	<	{ A visible record is one that is not truly deleted,
1854	<	and it is also listed in the FUpdateRecordTypes set }
1855	<
1856	<	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
1857	<	begin
1858	<	result := True;
1859	<	if not (State = dsOldValue) then
1860	<	result :=
1861	<	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
1862	<	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
1863	<	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
1864	<	end;
1865	<
1866	<
1867	<	function TIBCustomDataSet.LocateNext(const KeyFields: string;
1868	<	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1869	<	begin
1870	<	DisableControls;
1871	<	try
1872	<	result := InternalLocate(KeyFields, KeyValues, Options);
1873	<	finally
1874	<	EnableControls;
1875	<	end;
1876	<	end;
1877	<
1878	<	procedure TIBCustomDataSet.InternalPrepare;
1879	<	var
1880	<	SetCursor: Boolean;
1881	<	DidActivate: Boolean;
1882	<	begin
1883	<	if FInternalPrepared then
1884	<	Exit;
1885	<	DidActivate := False;
1886	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1887	<	if SetCursor then
1888	<	Screen.Cursor := crHourGlass;
1889	<	try
1890	<	ActivateConnection;
1891	<	DidActivate := ActivateTransaction;
1892	<	FBase.CheckDatabase;
1893	<	FBase.CheckTransaction;
1894	<	if FQSelect.SQL.Text <> '' then
1895	<	begin
1896	<	if not FQSelect.Prepared then
1897	<	begin
1898	<	FQSelect.ParamCheck := ParamCheck;
1899	<	FQSelect.Prepare;
1900	<	end;
1901	<	if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
1902	<	FQDelete.Prepare;
1903	<	if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
1904	<	FQInsert.Prepare;
1905	<	if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
1906	<	FQRefresh.Prepare;
1907	<	if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
1908	<	FQModify.Prepare;
1909	<	FInternalPrepared := True;
1910	<	InternalInitFieldDefs;
1911	<	end else
1912	<	IBError(ibxeEmptyQuery, [nil]);
1913	<	finally
1914	<	if DidActivate then
1915	<	DeactivateTransaction;
1916	<	if SetCursor and (Screen.Cursor = crHourGlass) then
1917	<	Screen.Cursor := crDefault;
1918	<	end;
1919	<	end;
1920	<
1921	<	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
1922	<	begin
1923	<	SetModified(Value);
1924	<	end;
1925	<
1926	<	procedure TIBCustomDataSet.RevertRecord;
1927	<	var
1928	<	Buff: PRecordData;
1929	<	begin
1930	<	if FCachedUpdates and FUpdatesPending then
1931	<	begin
1932	<	Buff := PRecordData(GetActiveBuf);
1933	<	InternalRevertRecord(Buff^.rdRecordNumber);
1934	<	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
1935	<	DataEvent(deRecordChange, 0);
1936	<	end;
1937	<	end;
1938	<
1939	<	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
1940	<	var
1941	<	OldBuffer: Pointer;
1942	<	procedure CopyOldBuffer;
1943	<	begin
1944	<	CopyRecordBuffer(Buffer, OldBuffer);
1945	<	if BlobFieldCount > 0 then
1946	<	FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream),
1947	<	0);
1948	<	end;
1949	<
1950	<	begin
1951	<	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
1952	<	begin
1953	<	OldBuffer := AllocRecordBuffer;
1954	<	try
1955	<	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
1956	<	begin
1957	<	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
1958	<	FILE_END);
1959	<	CopyOldBuffer;
1960	<	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
1961	<	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
1962	<	FILE_BEGIN, Buffer);
1963	<	end
1964	<	else begin
1965	<	CopyOldBuffer;
1966	<	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
1967	<	OldBuffer);
1968	<	end;
1969	<	finally
1970	<	FreeRecordBuffer(PChar(OldBuffer));
1971	<	end;
1972	<	end;
1973	<	end;
1974	<
1975	<	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
1976	<	begin
1977	<	if (Value <= 0) then
1978	<	FBufferChunks := BufferCacheSize
1979	<	else
1980	<	FBufferChunks := Value;
1981	<	end;
1982	<
1983	<	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
1984	<	begin
1985	<	if (FBase.Database <> Value) then
1986	<	begin
1987	<	CheckDatasetClosed;
1988	<	FBase.Database := Value;
1989	<	FQDelete.Database := Value;
1990	<	FQInsert.Database := Value;
1991	<	FQRefresh.Database := Value;
1992	<	FQSelect.Database := Value;
1993	<	FQModify.Database := Value;
1994	<	end;
1995	<	end;
1996	<
1997	<	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
1998	<	begin
1999	<	if FQDelete.SQL.Text <> Value.Text then
2000	<	begin
2001	<	Disconnect;
2002	<	FQDelete.SQL.Assign(Value);
2003	<	end;
2004	<	end;
2005	<
2006	<	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
2007	<	begin
2008	<	if FQInsert.SQL.Text <> Value.Text then
2009	<	begin
2010	<	Disconnect;
2011	<	FQInsert.SQL.Assign(Value);
2012	<	end;
2013	<	end;
2014	<
2015	<	procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
2016	<	var
2017	<	i, j: Integer;
2018	<	cr, data: PChar;
2019	<	fn, st: string;
2020	<	OldBuffer: Pointer;
2021	<	ts: TTimeStamp;
2022	<	begin
2023	<	if (Buffer = nil) then
2024	<	IBError(ibxeBufferNotSet, [nil]);
2025	<	if (not FInternalPrepared) then
2026	<	InternalPrepare;
2027	<	OldBuffer := nil;
2028	<	try
2029	<	for i := 0 to Qry.Params.Count - 1 do
2030	<	begin
2031	<	fn := Qry.Params[i].Name;
2032	<	if (Pos('OLD_', fn) = 1) then {mbcs ok}
2033	<	begin
2034	<	fn := Copy(fn, 5, Length(fn));
2035	<	if not Assigned(OldBuffer) then
2036	<	begin
2037	<	OldBuffer := AllocRecordBuffer;
2038	<	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
2039	<	end;
2040	<	cr := OldBuffer;
2041	<	end
2042	<	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
2043	<	begin
2044	<	fn := Copy(fn, 5, Length(fn));
2045	<	cr := Buffer;
2046	<	end
2047	<	else
2048	<	cr := Buffer;
2049	<	j := FQSelect.FieldIndex[fn] + 1;
2050	<	if (j > 0) then
2051	<	with PRecordData(cr)^ do
2052	<	begin
2053	<	if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize}
2054	<	begin
2055	<	PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey;
2056	<	continue;
2057	<	end;
2058	<	if rdFields[j].fdIsNull then
2059	<	Qry.Params[i].IsNull := True
2060	<	else begin
2061	<	Qry.Params[i].IsNull := False;
2062	<	data := cr + rdFields[j].fdDataOfs;
2063	<	case rdFields[j].fdDataType of
2064	<	SQL_TEXT, SQL_VARYING:
2065	<	begin
2066	<	SetString(st, data, rdFields[j].fdDataLength);
2067	<	Qry.Params[i].AsString := st;
2068	<	end;
2069	<	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
2070	<	Qry.Params[i].AsDouble := PDouble(data)^;
2071	<	SQL_SHORT, SQL_LONG:
2072	<	begin
2073	<	if rdFields[j].fdDataScale = 0 then
2074	<	Qry.Params[i].AsLong := PLong(data)^
2075	<	else if rdFields[j].fdDataScale >= (-4) then
2076	<	Qry.Params[i].AsCurrency := PCurrency(data)^
2077	<	else
2078	<	Qry.Params[i].AsDouble := PDouble(data)^;
2079	<	end;
2080	<	SQL_INT64:
2081	<	begin
2082	<	if rdFields[j].fdDataScale = 0 then
2083	<	Qry.Params[i].AsInt64 := PInt64(data)^
2084	<	else if rdFields[j].fdDataScale >= (-4) then
2085	<	Qry.Params[i].AsCurrency := PCurrency(data)^
2086	<	else
2087	<	Qry.Params[i].AsDouble := PDouble(data)^;
2088	<	end;
2089	<	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
2090	<	Qry.Params[i].AsQuad := PISC_QUAD(data)^;
2091	<	SQL_TYPE_DATE:
2092	<	begin
2093	<	ts.Date := PInt(data)^;
2094	<	ts.Time := 0;
2095	<	Qry.Params[i].AsDate :=
2096	<	TimeStampToDateTime(ts);
2097	<	end;
2098	<	SQL_TYPE_TIME:
2099	<	begin
2100	<	ts.Date := 0;
2101	<	ts.Time := PInt(data)^;
2102	<	Qry.Params[i].AsTime :=
2103	<	TimeStampToDateTime(ts);
2104	<	end;
2105	<	SQL_TIMESTAMP:
2106	<	Qry.Params[i].AsDateTime :=
2107	<	TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^)));
2108	<	end;
2109	<	end;
2110	<	end;
2111	<	end;
2112	<	finally
2113	<	if (OldBuffer <> nil) then
2114	<	FreeRecordBuffer(PChar(OldBuffer));
2115	<	end;
2116	<	end;
2117	<
2118	<	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2119	<	begin
2120	<	if FQRefresh.SQL.Text <> Value.Text then
2121	<	begin
2122	<	Disconnect;
2123	<	FQRefresh.SQL.Assign(Value);
2124	<	end;
2125	<	end;
2126	<
2127	<	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2128	<	begin
2129	<	if FQSelect.SQL.Text <> Value.Text then
2130	<	begin
2131	<	Disconnect;
2132	<	FQSelect.SQL.Assign(Value);
2133	<	end;
2134	<	end;
2135	<
2136	<	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2137	<	begin
2138	<	if FQModify.SQL.Text <> Value.Text then
2139	<	begin
2140	<	Disconnect;
2141	<	FQModify.SQL.Assign(Value);
2142	<	end;
2143	<	end;
2144	<
2145	<	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2146	<	begin
2147	<	if (FBase.Transaction <> Value) then
2148	<	begin
2149	<	CheckDatasetClosed;
2150	<	FBase.Transaction := Value;
2151	<	FQDelete.Transaction := Value;
2152	<	FQInsert.Transaction := Value;
2153	<	FQRefresh.Transaction := Value;
2154	<	FQSelect.Transaction := Value;
2155	<	FQModify.Transaction := Value;
2156	<	end;
2157	<	end;
2158	<
2159	<	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2160	<	begin
2161	<	CheckDatasetClosed;
2162	<	FUniDirectional := Value;
2163	<	end;
2164	<
2165	<	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2166	<	begin
2167	<	FUpdateRecordTypes := Value;
2168	<	if Active then
2169	<	First;
2170	<	end;
2171	<
2172	<	procedure TIBCustomDataSet.RefreshParams;
2173	<	var
2174	<	DataSet: TDataSet;
2175	<	begin
2176	<	DisableControls;
2177	<	try
2178	<	if FDataLink.DataSource <> nil then
2179	<	begin
2180	<	DataSet := FDataLink.DataSource.DataSet;
2181	<	if DataSet <> nil then
2182	<	if DataSet.Active and (DataSet.State <> dsSetKey) then
2183	<	begin
2184	<	Close;
2185	<	Open;
2186	<	end;
2187	<	end;
2188	<	finally
2189	<	EnableControls;
2190	<	end;
2191	<	end;
2192	<
2193	<
2194	<	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2195	<	begin
2196	<	if FOpen then
2197	<	InternalClose;
2198	<	if FInternalPrepared then
2199	<	InternalUnPrepare;
2200	<	end;
2201	<
2202	<	{ I can "undelete" uninserted records (make them "inserted" again).
2203	<	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2204	<	procedure TIBCustomDataSet.Undelete;
2205	<	var
2206	<	Buff: PRecordData;
2207	<	begin
2208	<	CheckActive;
2209	<	Buff := PRecordData(GetActiveBuf);
2210	<	with Buff^ do
2211	<	begin
2212	<	if rdCachedUpdateStatus = cusUninserted then
2213	<	begin
2214	<	rdCachedUpdateStatus := cusInserted;
2215	<	Dec(FDeletedRecords);
2216	<	end
2217	<	else if (rdUpdateStatus = usDeleted) and
2218	<	(rdCachedUpdateStatus = cusDeleted) then
2219	<	begin
2220	<	rdCachedUpdateStatus := cusUnmodified;
2221	<	rdUpdateStatus := usUnmodified;
2222	<	Dec(FDeletedRecords);
2223	<	end;
2224	<	WriteRecordCache(rdRecordNumber, PChar(Buff));
2225	<	end;
2226	<	end;
2227	<
2228	<	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2229	<	begin
2230	<	if Active then
2231	<	if GetActiveBuf <> nil then
2232	<	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2233	<	else
2234	<	result := usUnmodified
2235	<	else
2236	<	result := usUnmodified;
2237	<	end;
2238	<
2239	<	function TIBCustomDataSet.IsSequenced: Boolean;
2240	<	begin
2241	<	Result := Assigned( FQSelect ) and FQSelect.EOF;
2242	<	end;
2243	<
2244	<	function TIBCustomDataSet.ParamByName(ParamName: String): TIBXSQLVAR;
2245	<	begin
2246	<	ActivateConnection;
2247	<	ActivateTransaction;
2248	<	if not FInternalPrepared then
2249	<	InternalPrepare;
2250	<	Result := Params.ByName(ParamName);
2251	<	end;
2252	<
2253	<	{Beware: the parameter FCache is used as an identifier to determine which
2254	<	cache is being operated on and is not referenced in the computation.
2255	<	The result is an adjusted offset into the identified cache, either the
2256	<	Buffer Cache or the old Buffer Cache.}
2257	<
2258	<	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
2259	<	Origin: Integer): DWORD;
2260	<	var
2261	<	OldCacheSize: Integer;
2262	<	begin
2263	<	if (FCache = FBufferCache) then
2264	<	begin
2265	<	case Origin of
2266	<	FILE_BEGIN:    FBPos := Offset;
2267	<	FILE_CURRENT:  FBPos := FBPos + Offset;
2268	<	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
2269	<	end;
2270	<	OldCacheSize := FCacheSize;
2271	<	while (FBPos >= DWORD(FCacheSize)) do
2272	<	Inc(FCacheSize, FBufferChunkSize);
2273	<	if FCacheSize > OldCacheSize then
2274	<	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
2275	<	result := FBPos;
2276	<	end
2277	<	else begin
2278	<	case Origin of
2279	<	FILE_BEGIN:    FOBPos := Offset;
2280	<	FILE_CURRENT:  FOBPos := FOBPos + Offset;
2281	<	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
2282	<	end;
2283	<	OldCacheSize := FOldCacheSize;
2284	<	while (FBPos >= DWORD(FOldCacheSize)) do
2285	<	Inc(FOldCacheSize, FBufferChunkSize);
2286	<	if FOldCacheSize > OldCacheSize then
2287	<	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
2288	<	result := FOBPos;
2289	<	end;
2290	<	end;
2291	<
2292	<	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2293	<	Buffer: PChar);
2294	<	var
2295	<	pCache: PChar;
2296	<	AdjustedOffset: DWORD;
2297	<	bOld: Boolean;
2298	<	begin
2299	<	bOld := (FCache = FOldBufferCache);
2300	<	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2301	<	if not bOld then
2302	<	pCache := FBufferCache + AdjustedOffset
2303	<	else
2304	<	pCache := FOldBufferCache + AdjustedOffset;
2305	<	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
2306	<	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2307	<	end;
2308	<
2309	<	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
2310	<	ReadOldBuffer: Boolean);
2311	<	begin
2312	<	if FUniDirectional then
2313	<	RecordNumber := RecordNumber mod UniCache;
2314	<	if (ReadOldBuffer) then
2315	<	begin
2316	<	ReadRecordCache(RecordNumber, Buffer, False);
2317	<	if FCachedUpdates and
2318	<	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
2319	<	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2320	<	Buffer)
2321	<	else
2322	<	if ReadOldBuffer and
2323	<	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
2324	<	CopyRecordBuffer( FOldBuffer, Buffer )
2325	<	end
2326	<	else
2327	<	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2328	<	end;
2329	<
2330	<	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2331	<	Buffer: PChar);
2332	<	var
2333	<	pCache: PChar;
2334	<	AdjustedOffset: DWORD;
2335	<	bOld: Boolean;
2336	<	dwEnd: DWORD;
2337	<	begin
2338	<	bOld := (FCache = FOldBufferCache);
2339	<	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2340	<	if not bOld then
2341	<	pCache := FBufferCache + AdjustedOffset
2342	<	else
2343	<	pCache := FOldBufferCache + AdjustedOffset;
2344	<	Move(Buffer^, pCache^, FRecordBufferSize);
2345	<	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2346	<	if not bOld then
2347	<	begin
2348	<	if (dwEnd > FBEnd) then
2349	<	FBEnd := dwEnd;
2350	<	end
2351	<	else begin
2352	<	if (dwEnd > FOBEnd) then
2353	<	FOBEnd := dwEnd;
2354	<	end;
2355	<	end;
2356	<
2357	<	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
2358	<	begin
2359	<	if RecordNumber >= 0 then
2360	<	begin
2361	<	if FUniDirectional then
2362	<	RecordNumber := RecordNumber mod UniCache;
2363	<	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2364	<	end;
2365	<	end;
2366	<
2367	<	function TIBCustomDataSet.AllocRecordBuffer: PChar;
2368	<	begin
2369	<	result := nil;
2370	<	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
2371	<	Move(FModelBuffer^, result^, FRecordBufferSize);
2372	<	end;
2373	<
2374	<	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
2375	<	var
2376	<	pb: PBlobDataArray;
2377	<	fs: TIBBlobStream;
2378	<	Buff: PChar;
2379	<	bTr, bDB: Boolean;
2380	<	begin
2381	<	Buff := GetActiveBuf;
2382	<	if Buff = nil then
2383	<	begin
2384	<	fs := TIBBlobStream.Create;
2385	<	fs.Mode := bmReadWrite;
2386	<	FBlobStreamList.Add(Pointer(fs));
2387	<	result := TIBDSBlobStream.Create(Field, fs, Mode);
2388	<	exit;
2389	<	end;
2390	<	pb := PBlobDataArray(Buff + FBlobCacheOffset);
2391	<	if pb^[Field.Offset] = nil then
2392	<	begin
2393	<	AdjustRecordOnInsert(Buff);
2394	<	pb^[Field.Offset] := TIBBlobStream.Create;
2395	<	fs := pb^[Field.Offset];
2396	<	FBlobStreamList.Add(Pointer(fs));
2397	<	fs.Mode := bmReadWrite;
2398	<	fs.Database := Database;
2399	<	fs.Transaction := Transaction;
2400	<	fs.BlobID :=
2401	<	PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
2402	<	if (CachedUpdates) then
2403	<	begin
2404	<	bTr := not Transaction.InTransaction;
2405	<	bDB := not Database.Connected;
2406	<	if bDB then
2407	<	Database.Open;
2408	<	if bTr then
2409	<	Transaction.StartTransaction;
2410	<	fs.Seek(0, soFromBeginning);
2411	<	if bTr then
2412	<	Transaction.Commit;
2413	<	if bDB then
2414	<	Database.Close;
2415	<	end;
2416	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
2417	<	end else
2418	<	fs := pb^[Field.Offset];
2419	<	result := TIBDSBlobStream.Create(Field, fs, Mode);
2420	<	end;
2421	<
2422	<	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
2423	<	const
2424	<	CMPLess = -1;
2425	<	CMPEql  =  0;
2426	<	CMPGtr  =  1;
2427	<	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
2428	<	(CMPGtr, CMPEql));
2429	<	begin
2430	<	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
2431	<
2432	<	if Result = 2 then
2433	<	begin
2434	<	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
2435	<	Result := CMPLess
2436	<	else
2437	<	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
2438	<	Result := CMPGtr
2439	<	else
2440	<	Result := CMPEql;
2441	<	end;
2442	<	end;
2443	<
2444	<	procedure TIBCustomDataSet.DoBeforeDelete;
2445	<	var
2446	<	Buff: PRecordData;
2447	<	begin
2448	<	if not CanDelete then
2449	<	IBError(ibxeCannotDelete, [nil]);
2450	<	Buff := PRecordData(GetActiveBuf);
2451	<	if FCachedUpdates and
2452	<	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
2453	<	SaveOldBuffer(PChar(Buff));
2454	<	inherited DoBeforeDelete;
2455	<	end;
2456	<
2457	<	procedure TIBCustomDataSet.DoBeforeEdit;
2458	<	var
2459	<	Buff: PRecordData;
2460	<	begin
2461	<	Buff := PRecordData(GetActiveBuf);
2462	<	if not(CanEdit or (FQModify.SQL.Count <> 0) or
2463	<	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
2464	<	IBError(ibxeCannotUpdate, [nil]);
2465	<	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
2466	<	SaveOldBuffer(PChar(Buff));
2467	<	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
2468	<	inherited DoBeforeEdit;
2469	<	end;
2470	<
2471	<	procedure TIBCustomDataSet.DoBeforeInsert;
2472	<	begin
2473	<	if not CanInsert then
2474	<	IBError(ibxeCannotInsert, [nil]);
2475	<	inherited DoBeforeInsert;
2476	<	end;
2477	<
2478	<	procedure TIBCustomDataSet.DoAfterInsert;
2479	<	begin
2480	<	if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
2481	<	GeneratorField.Apply;
2482	<	inherited DoAfterInsert;
2483	<	end;
2484	<
2485	<	procedure TIBCustomDataSet.DoBeforePost;
2486	<	begin
2487	<	inherited DoBeforePost;
2488	<	if (State = dsInsert) and
2489	<	(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
2490	<	GeneratorField.Apply
2491	<	end;
2492	<
2493	<	procedure TIBCustomDataSet.FetchAll;
2494	<	var
2495	<	SetCursor: Boolean;
2496	<	{$IF FPC_FULLVERSION >  20602 }
2497	<	CurBookmark: TBookmark;
2498	<	{$ELSE}
2499	<	CurBookmark: string;
2500	<	{$ENDIF}
2501	<	begin
2502	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2503	<	if SetCursor then
2504	<	Screen.Cursor := crHourGlass;
2505	<	try
2506	<	if FQSelect.EOF or not FQSelect.Open then
2507	<	exit;
2508	<	DisableControls;
2509	<	try
2510	<	CurBookmark := Bookmark;
2511	<	Last;
2512	<	Bookmark := CurBookmark;
2513	<	finally
2514	<	EnableControls;
2515	<	end;
2516	<	finally
2517	<	if SetCursor and (Screen.Cursor = crHourGlass) then
2518	<	Screen.Cursor := crDefault;
2519	<	end;
2520	<	end;
2521	<
2522	<	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
2523	<	begin
2524	<	FreeMem(Buffer);
2525	<	Buffer := nil;
2526	<	end;
2527	<
2528	<	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
2529	<	begin
2530	<	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
2531	<	end;
2532	<
2533	<	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
2534	<	begin
2535	<	result := PRecordData(Buffer)^.rdBookmarkFlag;
2536	<	end;
2537	<
2538	<	function TIBCustomDataSet.GetCanModify: Boolean;
2539	<	begin
2540	<	result := (FQInsert.SQL.Text <> '') or
2541	<	(FQModify.SQL.Text <> '') or
2542	<	(FQDelete.SQL.Text <> '') or
2543	<	(Assigned(FUpdateObject));
2544	<	end;
2545	<
2546	<	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
2547	<	begin
2548	<	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
2549	<	begin
2550	<	UpdateCursorPos;
2551	<	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
2552	<	result := True;
2553	<	end
2554	<	else
2555	<	result := False;
2556	<	end;
2557	<
2558	<	function TIBCustomDataSet.GetDataSource: TDataSource;
2559	<	begin
2560	<	if FDataLink = nil then
2561	<	result := nil
2562	<	else
2563	<	result := FDataLink.DataSource;
2564	<	end;
2565	<
2566	<	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
2567	<	begin
2568	<	Result := DefaultFieldClasses[FieldType];
2569	<	end;
2570	<
2571	<	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
2572	<	begin
2573	<	result := GetFieldData(FieldByNumber(FieldNo), buffer);
2574	<	end;
2575	<
2576	<	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
2577	<	var
2578	<	Buff, Data: PChar;
2579	<	CurrentRecord: PRecordData;
2580	<	begin
2581	<	result := False;
2582	<	Buff := GetActiveBuf;
2583	<	if (Buff = nil) or
2584	<	(not IsVisible(Buff)) or not assigned(Field.DataSet) then
2585	<	exit;
2586	<	{ The intention here is to stuff the buffer with the data for the
2587	<	referenced field for the current record }
2588	<	CurrentRecord := PRecordData(Buff);
2589	<	if (Field.FieldNo < 0) then
2590	<	begin
2591	<	Inc(Buff, FRecordSize + Field.Offset);
2592	<	result := Boolean(Buff[0]);
2593	<	if result and (Buffer <> nil) then
2594	<	Move(Buff[1], Buffer^, Field.DataSize);
2595	<	end
2596	<	else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
2597	<	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
2598	<	begin
2599	<	result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull;
2600	<	if result and (Buffer <> nil) then
2601	<	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do
2602	<	begin
2603	<	Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs;
2604	<	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
2605	<	begin
2606	<	if fdDataLength <= Field.Size then
2607	<	begin
2608	<	Move(Data^, Buffer^, fdDataLength);
2609	<	PChar(Buffer)[fdDataLength] := #0;
2610	<	end
2611	<	else
2612	<	IBError(ibxeFieldSizeError,[Field.FieldName])
2613	<	end
2614	<	else
2615	<	Move(Data^, Buffer^, Field.DataSize);
2616	<	end;
2617	<	end;
2618	<	end;
2619	<
2620	<	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
2621	<	opposed to 0-based indexes.
2622	<	This is because we want LastRecordNumber/RecordCount = 1 }
2623	<
2624	<	function TIBCustomDataSet.GetRecNo: Integer;
2625	<	begin
2626	<	if GetActiveBuf = nil then
2627	<	result := 0
2628	<	else
2629	<	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
2630	<	end;
2631	<
2632	<	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
2633	<	DoCheck: Boolean): TGetResult;
2634	<	var
2635	<	Accept: Boolean;
2636	<	SaveState: TDataSetState;
2637	<	begin
2638	<	Result := grOK;
2639	<	if Filtered and Assigned(OnFilterRecord) then
2640	<	begin
2641	<	Accept := False;
2642	<	SaveState := SetTempState(dsFilter);
2643	<	while not Accept do
2644	<	begin
2645	<	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2646	<	if Result <> grOK then
2647	<	break;
2648	<	FFilterBuffer := Buffer;
2649	<	try
2650	<	Accept := True;
2651	<	OnFilterRecord(Self, Accept);
2652	<	if not Accept and (GetMode = gmCurrent) then
2653	<	GetMode := gmPrior;
2654	<	except
2655	<	//        Application.HandleException(Self);
2656	<	end;
2657	<	end;
2658	<	RestoreState(SaveState);
2659	<	end
2660	<	else
2661	<	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2662	<	end;
2663	<
2664	<	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
2665	<	DoCheck: Boolean): TGetResult;
2666	<	begin
2667	<	result := grError;
2668	<	case GetMode of
2669	<	gmCurrent: begin
2670	<	if (FCurrentRecord >= 0) then begin
2671	<	if FCurrentRecord < FRecordCount then
2672	<	ReadRecordCache(FCurrentRecord, Buffer, False)
2673	<	else begin
2674	<	while (not FQSelect.EOF) and
2675	<	(FQSelect.Next <> nil) and
2676	<	(FCurrentRecord >= FRecordCount) do begin
2677	<	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
2678	<	Inc(FRecordCount);
2679	<	end;
2680	<	FCurrentRecord := FRecordCount - 1;
2681	<	if (FCurrentRecord >= 0) then
2682	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2683	<	end;
2684	<	result := grOk;
2685	<	end else
2686	<	result := grBOF;
2687	<	end;
2688	<	gmNext: begin
2689	<	result := grOk;
2690	<	if FCurrentRecord = FRecordCount then
2691	<	result := grEOF
2692	<	else if FCurrentRecord = FRecordCount - 1 then begin
2693	<	if (not FQSelect.EOF) then begin
2694	<	FQSelect.Next;
2695	<	Inc(FCurrentRecord);
2696	<	end;
2697	<	if (FQSelect.EOF) then begin
2698	<	result := grEOF;
2699	<	end else begin
2700	<	Inc(FRecordCount);
2701	<	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
2702	<	end;
2703	<	end else if (FCurrentRecord < FRecordCount) then begin
2704	<	Inc(FCurrentRecord);
2705	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2706	<	end;
2707	<	end;
2708	<	else { gmPrior }
2709	<	begin
2710	<	if (FCurrentRecord = 0) then begin
2711	<	Dec(FCurrentRecord);
2712	<	result := grBOF;
2713	<	end else if (FCurrentRecord > 0) and
2714	<	(FCurrentRecord <= FRecordCount) then begin
2715	<	Dec(FCurrentRecord);
2716	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2717	<	result := grOk;
2718	<	end else if (FCurrentRecord = -1) then
2719	<	result := grBOF;
2720	<	end;
2721	<	end;
2722	<	if result = grOk then
2723	<	result := AdjustCurrentRecord(Buffer, GetMode);
2724	<	if result = grOk then with PRecordData(Buffer)^ do begin
2725	<	rdBookmarkFlag := bfCurrent;
2726	<	GetCalcFields(Buffer);
2727	<	end else if (result = grEOF) then begin
2728	<	CopyRecordBuffer(FModelBuffer, Buffer);
2729	<	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2730	<	end else if (result = grBOF) then begin
2731	<	CopyRecordBuffer(FModelBuffer, Buffer);
2732	<	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
2733	<	end else if (result = grError) then begin
2734	<	CopyRecordBuffer(FModelBuffer, Buffer);
2735	<	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2736	<	end;;
2737	<	end;
2738	<
2739	<	function TIBCustomDataSet.GetRecordCount: Integer;
2740	<	begin
2741	<	result := FRecordCount - FDeletedRecords;
2742	<	end;
2743	<
2744	<	function TIBCustomDataSet.GetRecordSize: Word;
2745	<	begin
2746	<	result := FRecordBufferSize;
2747	<	end;
2748	<
2749	<	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
2750	<	begin
2751	<	CheckEditState;
2752	<	begin
2753	<	{ When adding records, we *always* append.
2754	<	Insertion is just too costly }
2755	<	AdjustRecordOnInsert(Buffer);
2756	<	with PRecordData(Buffer)^ do
2757	<	begin
2758	<	rdUpdateStatus := usInserted;
2759	<	rdCachedUpdateStatus := cusInserted;
2760	<	end;
2761	<	if not CachedUpdates then
2762	<	InternalPostRecord(FQInsert, Buffer)
2763	<	else begin
2764	<	WriteRecordCache(FCurrentRecord, Buffer);
2765	<	FUpdatesPending := True;
2766	<	end;
2767	<	Inc(FRecordCount);
2768	<	InternalSetToRecord(Buffer);
2769	<	end
2770	<	end;
2771	<
2772	<	procedure TIBCustomDataSet.InternalCancel;
2773	<	var
2774	<	Buff: PChar;
2775	<	CurRec: Integer;
2776	<	begin
2777	<	inherited InternalCancel;
2778	<	Buff := GetActiveBuf;
2779	<	if Buff <> nil then begin
2780	<	CurRec := FCurrentRecord;
2781	<	AdjustRecordOnInsert(Buff);
2782	<	if (State = dsEdit) then begin
2783	<	CopyRecordBuffer(FOldBuffer, Buff);
2784	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2785	<	end else begin
2786	<	CopyRecordBuffer(FModelBuffer, Buff);
2787	<	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
2788	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2789	<	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
2790	<	FCurrentRecord := CurRec;
2791	<	end;
2792	<	end;
2793	<	end;
2794	<
2795	<
2796	<	procedure TIBCustomDataSet.InternalClose;
2797	<	begin
2798	<	if FDidActivate then
2799	<	DeactivateTransaction;
2800	<	FQSelect.Close;
2801	<	ClearBlobCache;
2802	<	FreeRecordBuffer(FModelBuffer);
2803	<	FreeRecordBuffer(FOldBuffer);
2804	<	FCurrentRecord := -1;
2805	<	FOpen := False;
2806	<	FRecordCount := 0;
2807	<	FDeletedRecords := 0;
2808	<	FRecordSize := 0;
2809	<	FBPos := 0;
2810	<	FOBPos := 0;
2811	<	FCacheSize := 0;
2812	<	FOldCacheSize := 0;
2813	<	FBEnd := 0;
2814	<	FOBEnd := 0;
2815	<	FreeMem(FBufferCache);
2816	<	FBufferCache := nil;
2817	<	FreeMem(FOldBufferCache);
2818	<	FOldBufferCache := nil;
2819	<	BindFields(False);
2820	<	if DefaultFields then DestroyFields;
2821	<	end;
2822	<
2823	<	procedure TIBCustomDataSet.InternalDelete;
2824	<	var
2825	<	Buff: PChar;
2826	<	SetCursor: Boolean;
2827	<	begin
2828	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2829	<	if SetCursor then
2830	<	Screen.Cursor := crHourGlass;
2831	<	try
2832	<	Buff := GetActiveBuf;
2833	<	if CanDelete then
2834	<	begin
2835	<	if not CachedUpdates then
2836	<	InternalDeleteRecord(FQDelete, Buff)
2837	<	else
2838	<	begin
2839	<	with PRecordData(Buff)^ do
2840	<	begin
2841	<	if rdCachedUpdateStatus = cusInserted then
2842	<	rdCachedUpdateStatus := cusUninserted
2843	<	else begin
2844	<	rdUpdateStatus := usDeleted;
2845	<	rdCachedUpdateStatus := cusDeleted;
2846	<	end;
2847	<	end;
2848	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2849	<	end;
2850	<	Inc(FDeletedRecords);
2851	<	FUpdatesPending := True;
2852	<	end else
2853	<	IBError(ibxeCannotDelete, [nil]);
2854	<	finally
2855	<	if SetCursor and (Screen.Cursor = crHourGlass) then
2856	<	Screen.Cursor := crDefault;
2857	<	end;
2858	<	end;
2859	<
2860	<	procedure TIBCustomDataSet.InternalFirst;
2861	<	begin
2862	<	FCurrentRecord := -1;
2863	<	end;
2864	<
2865	<	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
2866	<	begin
2867	<	FCurrentRecord := PInteger(Bookmark)^;
2868	<	end;
2869	<
2870	<	procedure TIBCustomDataSet.InternalHandleException;
2871	<	begin
2872	<	Application.HandleException(Self)
2873	<	end;
2874	<
2875	<	procedure TIBCustomDataSet.InternalInitFieldDefs;
2876	<	const
2877	<	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
2878	<	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
2879	<	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
2880	<	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
2881	<	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
2882	<	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
2883	<	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
2884	<	var
2885	<	FieldType: TFieldType;
2886	<	FieldSize: Word;
2887	<	FieldNullable : Boolean;
2888	<	i, FieldPosition, FieldPrecision: Integer;
2889	<	FieldAliasName: string;
2890	<	RelationName, FieldName: string;
2891	<	Query : TIBSQL;
2892	<	FieldIndex: Integer;
2893	<	FRelationNodes : TRelationNode;
2894	<
2895	<	function Add_Node(Relation, Field : String) : TRelationNode;
2896	<	var
2897	<	FField : TFieldNode;
2898	<	begin
2899	<	if FRelationNodes.RelationName = '' then
2900	<	Result := FRelationNodes
2901	<	else
2902	<	begin
2903	<	Result := TRelationNode.Create;
2904	<	Result.NextRelation := FRelationNodes;
2905	<	end;
2906	<	Result.RelationName := Relation;
2907	<	FRelationNodes := Result;
2908	<	Query.Params[0].AsString := Relation;
2909	<	Query.ExecQuery;
2910	<	while not Query.Eof do
2911	<	begin
2912	<	FField := TFieldNode.Create;
2913	<	FField.FieldName := Query.Fields[2].AsString;
2914	<	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
2915	<	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
2916	<	FField.NextField := Result.FieldNodes;
2917	<	Result.FieldNodes := FField;
2918	<	Query.Next;
2919	<	end;
2920	<	Query.Close;
2921	<	end;
2922	<
2923	<	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
2924	<	var
2925	<	FRelation : TRelationNode;
2926	<	FField : TFieldNode;
2927	<	begin
2928	<	FRelation := FRelationNodes;
2929	<	while Assigned(FRelation) and
2930	<	(FRelation.RelationName <> Relation) do
2931	<	FRelation := FRelation.NextRelation;
2932	<	if not Assigned(FRelation) then
2933	<	FRelation := Add_Node(Relation, Field);
2934	<	Result := false;
2935	<	FField := FRelation.FieldNodes;
2936	<	while Assigned(FField) do
2937	<	if FField.FieldName = Field then
2938	<	begin
2939	<	Result := Ffield.COMPUTED_BLR;
2940	<	Exit;
2941	<	end
2942	<	else
2943	<	FField := Ffield.NextField;
2944	<	end;
2945	<
2946	<	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
2947	<	var
2948	<	FRelation : TRelationNode;
2949	<	FField : TFieldNode;
2950	<	begin
2951	<	FRelation := FRelationNodes;
2952	<	while Assigned(FRelation) and
2953	<	(FRelation.RelationName <> Relation) do
2954	<	FRelation := FRelation.NextRelation;
2955	<	if not Assigned(FRelation) then
2956	<	FRelation := Add_Node(Relation, Field);
2957	<	Result := false;
2958	<	FField := FRelation.FieldNodes;
2959	<	while Assigned(FField) do
2960	<	if FField.FieldName = Field then
2961	<	begin
2962	<	Result := Ffield.DEFAULT_VALUE;
2963	<	Exit;
2964	<	end
2965	<	else
2966	<	FField := Ffield.NextField;
2967	<	end;
2968	<
2969	<	Procedure FreeNodes;
2970	<	var
2971	<	FRelation : TRelationNode;
2972	<	FField : TFieldNode;
2973	<	begin
2974	<	while Assigned(FRelationNodes) do
2975	<	begin
2976	<	While Assigned(FRelationNodes.FieldNodes) do
2977	<	begin
2978	<	FField := FRelationNodes.FieldNodes.NextField;
2979	<	FRelationNodes.FieldNodes.Free;
2980	<	FRelationNodes.FieldNodes := FField;
2981	<	end;
2982	<	FRelation := FRelationNodes.NextRelation;
2983	<	FRelationNodes.Free;
2984	<	FRelationNodes := FRelation;
2985	<	end;
2986	<	end;
2987	<
2988	<	begin
2989	<	if not InternalPrepared then
2990	<	begin
2991	<	InternalPrepare;
2992	<	exit;
2993	<	end;
2994	<	FRelationNodes := TRelationNode.Create;
2995	<	FNeedsRefresh := False;
2996	<	Database.InternalTransaction.StartTransaction;
2997	<	Query := TIBSQL.Create(self);
2998	<	try
2999	<	Query.Database := DataBase;
3000	<	Query.Transaction := Database.InternalTransaction;
3001	<	FieldDefs.BeginUpdate;
3002	<	FieldDefs.Clear;
3003	<	FieldIndex := 0;
3004	<	if (Length(FMappedFieldPosition) < FQSelect.Current.Count) then
3005	<	SetLength(FMappedFieldPosition, FQSelect.Current.Count);
3006	<	Query.SQL.Text := DefaultSQL;
3007	<	Query.Prepare;
3008	<	for i := 0 to FQSelect.Current.Count - 1 do
3009	<	with FQSelect.Current[i].Data^ do
3010	<	begin
3011	<	{ Get the field name }
3012	<	SetString(FieldAliasName, aliasname, aliasname_length);
3013	<	SetString(RelationName, relname, relname_length);
3014	<	SetString(FieldName, sqlname, sqlname_length);
3015	<	FieldSize := 0;
3016	<	FieldPrecision := 0;
3017	<	FieldNullable := FQSelect.Current[i].IsNullable;
3018	<	case sqltype and not 1 of
3019	<	{ All VARCHAR's must be converted to strings before recording
3020	<	their values }
3021	<	SQL_VARYING, SQL_TEXT:
3022	<	begin
3023	<	FieldSize := sqllen;
3024	<	FieldType := ftString;
3025	<	end;
3026	<	{ All Doubles/Floats should be cast to doubles }
3027	<	SQL_DOUBLE, SQL_FLOAT:
3028	<	FieldType := ftFloat;
3029	<	SQL_SHORT:
3030	<	begin
3031	<	if (sqlscale = 0) then
3032	<	FieldType := ftSmallInt
3033	<	else begin
3034	<	FieldType := ftBCD;
3035	<	FieldPrecision := 4;
3036	<	FieldSize := -sqlscale;
3037	<	end;
3038	<	end;
3039	<	SQL_LONG:
3040	<	begin
3041	<	if (sqlscale = 0) then
3042	<	FieldType := ftInteger
3043	<	else if (sqlscale >= (-4)) then
3044	<	begin
3045	<	FieldType := ftBCD;
3046	<	FieldPrecision := 9;
3047	<	FieldSize := -sqlscale;
3048	<	end
3049	<	else
3050	<	if Database.SQLDialect = 1 then
3051	<	FieldType := ftFloat
3052	<	else
3053	<	if (FieldCount > i) and (Fields[i] is TFloatField) then
3054	<	FieldType := ftFloat
3055	<	else
3056	<	begin
3057	<	FieldType := ftFMTBCD;
3058	<	FieldPrecision := 9;
3059	<	FieldSize := -sqlscale;
3060	<	end;
3061	<	end;
3062	<
3063	<	SQL_INT64:
3064	<	begin
3065	<	if (sqlscale = 0) then
3066	<	FieldType := ftLargeInt
3067	<	else if (sqlscale >= (-4)) then
3068	<	begin
3069	<	FieldType := ftBCD;
3070	<	FieldPrecision := 18;
3071	<	FieldSize := -sqlscale;
3072	<	end
3073	<	else
3074	<	FieldType := ftFloat
3075	<	end;
3076	<	SQL_TIMESTAMP: FieldType := ftDateTime;
3077	<	SQL_TYPE_TIME: FieldType := ftTime;
3078	<	SQL_TYPE_DATE: FieldType := ftDate;
3079	<	SQL_BLOB:
3080	<	begin
3081	<	FieldSize := sizeof (TISC_QUAD);
3082	<	if (sqlsubtype = 1) then
3083	<	FieldType := ftmemo
3084	<	else
3085	<	FieldType := ftBlob;
3086	<	end;
3087	<	SQL_ARRAY:
3088	<	begin
3089	<	FieldSize := sizeof (TISC_QUAD);
3090	<	FieldType := ftUnknown;
3091	<	end;
3092	<	else
3093	<	FieldType := ftUnknown;
3094	<	end;
3095	<	FieldPosition := i + 1;
3096	<	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
3097	<	begin
3098	<	FMappedFieldPosition[FieldIndex] := FieldPosition;
3099	<	Inc(FieldIndex);
3100	<	with FieldDefs.AddFieldDef do
3101	<	begin
3102	<	Name := FieldAliasName;
3103	<	(*           FieldNo := FieldPosition;*)
3104	<	DataType := FieldType;
3105	<	Size := FieldSize;
3106	<	Precision := FieldPrecision;
3107	<	Required := not FieldNullable;
3108	<	InternalCalcField := False;
3109	<	if (FieldName <> '') and (RelationName <> '') then
3110	<	begin
3111	<	if Has_COMPUTED_BLR(RelationName, FieldName) then
3112	<	begin
3113	<	Attributes := [faReadOnly];
3114	<	InternalCalcField := True;
3115	<	FNeedsRefresh := True;
3116	<	end
3117	<	else
3118	<	begin
3119	<	if Has_DEFAULT_VALUE(RelationName, FieldName) then
3120	<	begin
3121	<	if not FieldNullable then
3122	<	Attributes := [faRequired];
3123	<	end
3124	<	else
3125	<	FNeedsRefresh := True;
3126	<	end;
3127	<	end;
3128	<	end;
3129	<	end;
3130	<	end;
3131	<	finally
3132	<	Query.free;
3133	<	FreeNodes;
3134	<	Database.InternalTransaction.Commit;
3135	<	FieldDefs.EndUpdate;
3136	<	end;
3137	<	end;
3138	<
3139	<	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
3140	<	begin
3141	<	CopyRecordBuffer(FModelBuffer, Buffer);
3142	<	end;
3143	<
3144	<	procedure TIBCustomDataSet.InternalLast;
3145	<	var
3146	<	Buffer: PChar;
3147	<	begin
3148	<	if (FQSelect.EOF) then
3149	<	FCurrentRecord := FRecordCount
3150	<	else begin
3151	<	Buffer := AllocRecordBuffer;
3152	<	try
3153	<	while FQSelect.Next <> nil do
3154	<	begin
3155	<	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3156	<	Inc(FRecordCount);
3157	<	end;
3158	<	FCurrentRecord := FRecordCount;
3159	<	finally
3160	<	FreeRecordBuffer(Buffer);
3161	<	end;
3162	<	end;
3163	<	end;
3164	<
3165	<	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
3166	<	var
3167	<	i: Integer;
3168	<	cur_param: TIBXSQLVAR;
3169	<	cur_field: TField;
3170	<	s: TStream;
3171	<	begin
3172	<	if FQSelect.SQL.Text = '' then
3173	<	IBError(ibxeEmptyQuery, [nil]);
3174	<	if not FInternalPrepared then
3175	<	InternalPrepare;
3176	<	if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
3177	<	begin
3178	<	for i := 0 to SQLParams.Count - 1 do
3179	<	begin
3180	<	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
3181	<	cur_param := SQLParams[i];
3182	<	if (cur_field <> nil) then begin
3183	<	if (cur_field.IsNull) then
3184	<	cur_param.IsNull := True
3185	<	else case cur_field.DataType of
3186	<	ftString:
3187	<	cur_param.AsString := cur_field.AsString;
3188	<	ftBoolean, ftSmallint, ftWord:
3189	<	cur_param.AsShort := cur_field.AsInteger;
3190	<	ftInteger:
3191	<	cur_param.AsLong := cur_field.AsInteger;
3192	<	ftLargeInt:
3193	<	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
3194	<	ftFloat, ftCurrency:
3195	<	cur_param.AsDouble := cur_field.AsFloat;
3196	<	ftBCD:
3197	<	cur_param.AsCurrency := cur_field.AsCurrency;
3198	<	ftDate:
3199	<	cur_param.AsDate := cur_field.AsDateTime;
3200	<	ftTime:
3201	<	cur_param.AsTime := cur_field.AsDateTime;
3202	<	ftDateTime:
3203	<	cur_param.AsDateTime := cur_field.AsDateTime;
3204	<	ftBlob, ftMemo:
3205	<	begin
3206	<	s := nil;
3207	<	try
3208	<	s := DataSource.DataSet.
3209	<	CreateBlobStream(cur_field, bmRead);
3210	<	cur_param.LoadFromStream(s);
3211	<	finally
3212	<	s.free;
3213	<	end;
3214	<	end;
3215	<	else
3216	<	IBError(ibxeNotSupported, [nil]);
3217	<	end;
3218	<	end;
3219	<	end;
3220	<	end;
3221	<	end;
3222	<
3223	<	procedure TIBCustomDataSet.ReQuery;
3224	<	begin
3225	<	FQSelect.Close;
3226	<	ClearBlobCache;
3227	<	FCurrentRecord := -1;
3228	<	FRecordCount := 0;
3229	<	FDeletedRecords := 0;
3230	<	FBPos := 0;
3231	<	FOBPos := 0;
3232	<	FBEnd := 0;
3233	<	FOBEnd := 0;
3234	<	FQSelect.Close;
3235	<	FQSelect.ExecQuery;
3236	<	FOpen := FQSelect.Open;
3237	<	First;
3238	<	end;
3239	<
3240	<	procedure TIBCustomDataSet.InternalOpen;
3241	<	var
3242	<	SetCursor: Boolean;
3243	<
3244	<	function RecordDataLength(n: Integer): Long;
3245	<	begin
3246	<	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
3247	<	end;
3248	<
3249	<	begin
3250	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3251	<	if SetCursor then
3252	<	Screen.Cursor := crHourGlass;
3253	<	try
3254	<	ActivateConnection;
3255	<	ActivateTransaction;
3256	<	if FQSelect.SQL.Text = '' then
3257	<	IBError(ibxeEmptyQuery, [nil]);
3258	<	if not FInternalPrepared then
3259	<	InternalPrepare;
3260	<	if FQSelect.SQLType = SQLSelect then
3261	<	begin
3262	<	if DefaultFields then
3263	<	CreateFields;
3264	<	BindFields(True);
3265	<	FCurrentRecord := -1;
3266	<	FQSelect.ExecQuery;
3267	<	FOpen := FQSelect.Open;
3268	<
3269	<	{ Initialize offsets, buffer sizes, etc...
3270	<	1. Initially FRecordSize is just the "RecordDataLength".
3271	<	2. Allocate a "model" buffer and do a dummy fetch
3272	<	3. After the dummy fetch, FRecordSize will be appropriately
3273	<	adjusted to reflect the additional "weight" of the field
3274	<	data.
3275	<	4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize.
3276	<	5. Now, with the BufferSize available, allocate memory for chunks of records
3277	<	6. Re-allocate the model buffer, accounting for the new
3278	<	FRecordBufferSize.
3279	<	7. Finally, calls to AllocRecordBuffer will work!.
3280	<	}
3281	<	{Step 1}
3282	<	FRecordSize := RecordDataLength(FQSelect.Current.Count);
3283	<	{Step 2, 3}
3284	<	IBAlloc(FModelBuffer, 0, FRecordSize);
3285	<	FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer);
3286	<	{Step 4}
3287	<	FCalcFieldsOffset := FRecordSize;
3288	<	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
3289	<	FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
3290	<	{Step 5}
3291	<	if UniDirectional then
3292	<	FBufferChunkSize := FRecordBufferSize * UniCache
3293	<	else
3294	<	FBufferChunkSize := FRecordBufferSize * BufferChunks;
3295	<	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
3296	<	if FCachedUpdates or (csReading in ComponentState) then
3297	<	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
3298	<	FBPos := 0;
3299	<	FOBPos := 0;
3300	<	FBEnd := 0;
3301	<	FOBEnd := 0;
3302	<	FCacheSize := FBufferChunkSize;
3303	<	FOldCacheSize := FBufferChunkSize;
3304	<	{Step 6}
3305	<	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count),
3306	<	FRecordBufferSize);
3307	<	{Step 7}
3308	<	FOldBuffer := AllocRecordBuffer;
3309	<	end
3310	<	else
3311	<	FQSelect.ExecQuery;
3312	<	finally
3313	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3314	<	Screen.Cursor := crDefault;
3315	<	end;
3316	<	end;
3317	<
3318	<	procedure TIBCustomDataSet.InternalPost;
3319	<	var
3320	<	Qry: TIBSQL;
3321	<	Buff: PChar;
3322	<	SetCursor: Boolean;
3323	<	bInserting: Boolean;
3324	<	begin
3325	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3326	<	if SetCursor then
3327	<	Screen.Cursor := crHourGlass;
3328	<	try
3329	<	Buff := GetActiveBuf;
3330	<	CheckEditState;
3331	<	AdjustRecordOnInsert(Buff);
3332	<	if (State = dsInsert) then
3333	<	begin
3334	<	bInserting := True;
3335	<	Qry := FQInsert;
3336	<	PRecordData(Buff)^.rdUpdateStatus := usInserted;
3337	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3338	<	WriteRecordCache(FRecordCount, Buff);
3339	<	FCurrentRecord := FRecordCount;
3340	<	end
3341	<	else begin
3342	<	bInserting := False;
3343	<	Qry := FQModify;
3344	<	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
3345	<	begin
3346	<	PRecordData(Buff)^.rdUpdateStatus := usModified;
3347	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
3348	<	end
3349	<	else if PRecordData(Buff)^.
3350	<	rdCachedUpdateStatus = cusUninserted then
3351	<	begin
3352	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3353	<	Dec(FDeletedRecords);
3354	<	end;
3355	<	end;
3356	<	if (not CachedUpdates) then
3357	<	InternalPostRecord(Qry, Buff)
3358	<	else begin
3359	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3360	<	FUpdatesPending := True;
3361	<	end;
3362	<	if bInserting then
3363	<	Inc(FRecordCount);
3364	<	finally
3365	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3366	<	Screen.Cursor := crDefault;
3367	<	end;
3368	<	end;
3369	<
3370	<	procedure TIBCustomDataSet.InternalRefresh;
3371	<	begin
3372	<	inherited InternalRefresh;
3373	<	InternalRefreshRow;
3374	<	end;
3375	<
3376	<	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
3377	<	begin
3378	<	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
3379	<	end;
3380	<
3381	<	function TIBCustomDataSet.IsCursorOpen: Boolean;
3382	<	begin
3383	<	result := FOpen;
3384	<	end;
3385	<
3386	<	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
3387	<	Options: TLocateOptions): Boolean;
3388	<	var
3389	<	{$IF FPC_FULLVERSION >  20602 }
3390	<	CurBookmark: TBookmark;
3391	<	{$ELSE}
3392	<	CurBookmark: string;
3393	<	{$ENDIF}
3394	<	begin
3395	<	DisableControls;
3396	<	try
3397	<	CurBookmark := Bookmark;
3398	<	First;
3399	<	result := InternalLocate(KeyFields, KeyValues, Options);
3400	<	if not result then
3401	<	Bookmark := CurBookmark;
3402	<	finally
3403	<	EnableControls;
3404	<	end;
3405	<	end;
3406	<
3407	<	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
3408	<	const ResultFields: string): Variant;
3409	<	var
3410	<	fl: TList;
3411	<	{$IF FPC_FULLVERSION >  20602 }
3412	<	CurBookmark: TBookmark;
3413	<	{$ELSE}
3414	<	CurBookmark: string;
3415	<	{$ENDIF}
3416	<	begin
3417	<	DisableControls;
3418	<	fl := TList.Create;
3419	<	CurBookmark := Bookmark;
3420	<	try
3421	<	First;
3422	<	if InternalLocate(KeyFields, KeyValues, []) then
3423	<	begin
3424	<	if (ResultFields <> '') then
3425	<	result := FieldValues[ResultFields]
3426	<	else
3427	<	result := NULL;
3428	<	end
3429	<	else
3430	<	result := Null;
3431	<	finally
3432	<	Bookmark := CurBookmark;
3433	<	fl.Free;
3434	<	EnableControls;
3435	<	end;
3436	<	end;
3437	<
3438	<	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
3439	<	begin
3440	<	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
3441	<	end;
3442	<
3443	<	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
3444	<	begin
3445	<	PRecordData(Buffer)^.rdBookmarkFlag := Value;
3446	<	end;
3447	<
3448	<	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
3449	<	begin
3450	<	if not Value and FCachedUpdates then
3451	<	CancelUpdates;
3452	<	if (not (csReading in ComponentState)) and Value then
3453	<	CheckDatasetClosed;
3454	<	FCachedUpdates := Value;
3455	<	end;
3456	<
3457	<	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
3458	<	begin
3459	<	if IsLinkedTo(Value) then
3460	<	IBError(ibxeCircularReference, [nil]);
3461	<	if FDataLink <> nil then
3462	<	FDataLink.DataSource := Value;
3463	<	end;
3464	<
3465	<	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
3466	<	var
3467	<	Buff, TmpBuff: PChar;
3468	<	begin
3469	<	Buff := GetActiveBuf;
3470	<	if Field.FieldNo < 0 then
3471	<	begin
3472	<	TmpBuff := Buff + FRecordSize + Field.Offset;
3473	<	Boolean(TmpBuff[0]) := LongBool(Buffer);
3474	<	if Boolean(TmpBuff[0]) then
3475	<	Move(Buffer^, TmpBuff[1], Field.DataSize);
3476	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3477	<	end
3478	<	else begin
3479	<	CheckEditState;
3480	<	with PRecordData(Buff)^ do
3481	<	begin
3482	<	{ If inserting, Adjust record position }
3483	<	AdjustRecordOnInsert(Buff);
3484	<	if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
3485	<	(FMappedFieldPosition[Field.FieldNo - 1] <= rdFieldCount) then
3486	<	begin
3487	<	Field.Validate(Buffer);
3488	<	if (Buffer = nil) or
3489	<	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
3490	<	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull := True
3491	<	else begin
3492	<	Move(Buffer^, Buff[rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs],
3493	<	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataSize);
3494	<	if (rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataType = SQL_TEXT) or
3495	<	(rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataType = SQL_VARYING) then
3496	<	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataLength := StrLen(PChar(Buffer));
3497	<	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull := False;
3498	<	if rdUpdateStatus = usUnmodified then
3499	<	begin
3500	<	if CachedUpdates then
3501	<	begin
3502	<	FUpdatesPending := True;
3503	<	if State = dsInsert then
3504	<	rdCachedUpdateStatus := cusInserted
3505	<	else if State = dsEdit then
3506	<	rdCachedUpdateStatus := cusModified;
3507	<	end;
3508	<
3509	<	if State = dsInsert then
3510	<	rdUpdateStatus := usInserted
3511	<	else
3512	<	rdUpdateStatus := usModified;
3513	<	end;
3514	<	WriteRecordCache(rdRecordNumber, Buff);
3515	<	SetModified(True);
3516	<	end;
3517	<	end;
3518	<	end;
3519	<	end;
3520	<	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
3521	<	DataEvent(deFieldChange, PtrInt(Field));
3522	<	end;
3523	<
3524	<	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
3525	<	begin
3526	<	CheckBrowseMode;
3527	<	if (Value < 1) then
3528	<	Value := 1
3529	<	else if Value > FRecordCount then
3530	<	begin
3531	<	InternalLast;
3532	<	Value := Min(FRecordCount, Value);
3533	<	end;
3534	<	if (Value <> RecNo) then
3535	<	begin
3536	<	DoBeforeScroll;
3537	<	FCurrentRecord := Value - 1;
3538	<	Resync([]);
3539	<	DoAfterScroll;
3540	<	end;
3541	<	end;
3542	<
3543	<	procedure TIBCustomDataSet.Disconnect;
3544	<	begin
3545	<	Close;
3546	<	InternalUnPrepare;
3547	<	end;
3548	<
3549	<	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
3550	<	begin
3551	<	if not CanModify then
3552	<	IBError(ibxeCannotUpdate, [nil])
3553	<	else
3554	<	FUpdateMode := Value;
3555	<	end;
3556	<
3557	<
3558	<	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
3559	<	begin
3560	<	if Value <> FUpdateObject then
3561	<	begin
3562	<	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
3563	<	FUpdateObject.DataSet := nil;
3564	<	FUpdateObject := Value;
3565	<	if Assigned(FUpdateObject) then
3566	<	begin
3567	<	if Assigned(FUpdateObject.DataSet) and
3568	<	(FUpdateObject.DataSet <> Self) then
3569	<	FUpdateObject.DataSet.UpdateObject := nil;
3570	<	FUpdateObject.DataSet := Self;
3571	<	end;
3572	<	end;
3573	<	end;
3574	<
3575	<	function TIBCustomDataSet.ConstraintsStored: Boolean;
3576	<	begin
3577	<	Result := Constraints.Count > 0;
3578	<	end;
3579	<
3580	<	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
3581	<	begin
3582	<	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
3583	<	end;
3584	<
3585	<
3586	<	procedure TIBCustomDataSet.InternalUnPrepare;
3587	<	begin
3588	<	if FInternalPrepared then
3589	<	begin
3590	<	CheckDatasetClosed;
3591	<	FieldDefs.Clear;
3592	<	FInternalPrepared := False;
3593	<	end;
3594	<	end;
3595	<
3596	<	procedure TIBCustomDataSet.InternalExecQuery;
3597	<	var
3598	<	DidActivate: Boolean;
3599	<	SetCursor: Boolean;
3600	<	begin
3601	<	DidActivate := False;
3602	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3603	<	if SetCursor then
3604	<	Screen.Cursor := crHourGlass;
3605	<	try
3606	<	ActivateConnection;
3607	<	DidActivate := ActivateTransaction;
3608	<	if FQSelect.SQL.Text = '' then
3609	<	IBError(ibxeEmptyQuery, [nil]);
3610	<	if not FInternalPrepared then
3611	<	InternalPrepare;
3612	<	if FQSelect.SQLType = SQLSelect then
3613	<	begin
3614	<	IBError(ibxeIsASelectStatement, [nil]);
3615	<	end
3616	<	else
3617	<	FQSelect.ExecQuery;
3618	<	finally
3619	<	if DidActivate then
3620	<	DeactivateTransaction;
3621	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3622	<	Screen.Cursor := crDefault;
3623	<	end;
3624	<	end;
3625	<
3626	<	function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE;
3627	<	begin
3628	<	Result := FQSelect.Handle;
3629	<	end;
3630	<
3631	<	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
3632	<	begin
3633	<	inherited InitRecord(Buffer);
3634	<	with PRecordData(Buffer)^ do
3635	<	begin
3636	<	rdUpdateStatus := TUpdateStatus(usInserted);
3637	<	rdBookMarkFlag := bfInserted;
3638	<	rdRecordNumber := -1;
3639	<	end;
3640	<	end;
3641	<
3642	<	procedure TIBCustomDataSet.InternalInsert;
3643	<	begin
3644	<	CursorPosChanged;
3645	<	end;
3646	<
3647	<	{ TIBDataSet IProviderSupport }
3648	<
3649	<	(*procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
3650	<	begin
3651	<	if Commit then
3652	<	Transaction.Commit else
3653	<	Transaction.Rollback;
3654	<	end;
3655	<
3656	<	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
3657	<	ResultSet: Pointer = nil): Integer;
3658	<	var
3659	<	FQuery: TIBQuery;
3660	<	begin
3661	<	if Assigned(ResultSet) then
3662	<	begin
3663	<	TDataSet(ResultSet^) := TIBQuery.Create(nil);
3664	<	with TIBQuery(ResultSet^) do
3665	<	begin
3666	<	SQL.Text := ASQL;
3667	<	Params.Assign(AParams);
3668	<	Open;
3669	<	Result := RowsAffected;
3670	<	end;
3671	<	end
3672	<	else
3673	<	begin
3674	<	FQuery := TIBQuery.Create(nil);
3675	<	try
3676	<	FQuery.Database := Database;
3677	<	FQuery.Transaction := Transaction;
3678	<	FQuery.GenerateParamNames := True;
3679	<	FQuery.SQL.Text := ASQL;
3680	<	FQuery.Params.Assign(AParams);
3681	<	FQuery.ExecSQL;
3682	<	Result := FQuery.RowsAffected;
3683	<	finally
3684	<	FQuery.Free;
3685	<	end;
3686	<	end;
3687	<	end;
3688	<
3689	<	function TIBCustomDataSet.PSGetQuoteChar: string;
3690	<	begin
3691	<	if Database.SQLDialect = 3 then
3692	<	Result := '"' else
3693	<	Result := '';
3694	<	end;
3695	<
3696	<	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
3697	<	var
3698	<	PrevErr: Integer;
3699	<	begin
3700	<	if Prev <> nil then
3701	<	PrevErr := Prev.ErrorCode else
3702	<	PrevErr := 0;
3703	<	if E is EIBError then
3704	<	with EIBError(E) do
3705	<	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
3706	<	Result := inherited PSGetUpdateException(E, Prev);
3707	<	end;
3708	<
3709	<	function TIBCustomDataSet.PSInTransaction: Boolean;
3710	<	begin
3711	<	Result := Transaction.InTransaction;
3712	<	end;
3713	<
3714	<	function TIBCustomDataSet.PSIsSQLBased: Boolean;
3715	<	begin
3716	<	Result := True;
3717	<	end;
3718	<
3719	<	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
3720	<	begin
3721	<	Result := True;
3722	<	end;
3723	<
3724	<	procedure TIBCustomDataSet.PSReset;
3725	<	begin
3726	<	inherited PSReset;
3727	<	if Active then
3728	<	begin
3729	<	Close;
3730	<	Open;
3731	<	end;
3732	<	end;
3733	<
3734	<	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
3735	<	var
3736	<	UpdateAction: TIBUpdateAction;
3737	<	SQL: string;
3738	<	Params: TParams;
3739	<
3740	<	procedure AssignParams(DataSet: TDataSet; Params: TParams);
3741	<	var
3742	<	I: Integer;
3743	<	Old: Boolean;
3744	<	Param: TParam;
3745	<	PName: string;
3746	<	Field: TField;
3747	<	Value: Variant;
3748	<	begin
3749	<	for I := 0 to Params.Count - 1 do
3750	<	begin
3751	<	Param := Params[I];
3752	<	PName := Param.Name;
3753	<	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
3754	<	if Old then System.Delete(PName, 1, 4);
3755	<	Field := DataSet.FindField(PName);
3756	<	if not Assigned(Field) then Continue;
3757	<	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
3758	<	begin
3759	<	Value := Field.NewValue;
3760	<	if VarIsEmpty(Value) then Value := Field.OldValue;
3761	<	Param.AssignFieldValue(Field, Value);
3762	<	end;
3763	<	end;
3764	<	end;
3765	<
3766	<	begin
3767	<	Result := False;
3768	<	if Assigned(OnUpdateRecord) then
3769	<	begin
3770	<	UpdateAction := uaFail;
3771	<	if Assigned(FOnUpdateRecord) then
3772	<	begin
3773	<	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
3774	<	Result := UpdateAction = uaApplied;
3775	<	end;
3776	<	end
3777	<	else if Assigned(FUpdateObject) then
3778	<	begin
3779	<	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
3780	<	if SQL <> '' then
3781	<	begin
3782	<	Params := TParams.Create;
3783	<	try
3784	<	Params.ParseSQL(SQL, True);
3785	<	AssignParams(Delta, Params);
3786	<	if PSExecuteStatement(SQL, Params) = 0 then
3787	<	IBError(ibxeNoRecordsAffected, [nil]);
3788	<	Result := True;
3789	<	finally
3790	<	Params.Free;
3791	<	end;
3792	<	end;
3793	<	end;
3794	<	end;
3795	<
3796	<	procedure TIBCustomDataSet.PSStartTransaction;
3797	<	begin
3798	<	ActivateConnection;
3799	<	Transaction.StartTransaction;
3800	<	end;
3801	<
3802	<	function TIBCustomDataSet.PSGetTableName: string;
3803	<	begin
3804	<	//  if not FInternalPrepared then
3805	<	//    InternalPrepare;
3806	<	{ It is possible for the FQSelectSQL to be unprepared
3807	<	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
3808	<	So check the Prepared of the SelectSQL instead }
3809	<	if not FQSelect.Prepared then
3810	<	FQSelect.Prepare;
3811	<	Result := FQSelect.UniqueRelationName;
3812	<	end;*)
3813	<
3814	<	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
3815	<	begin
3816	<	InternalBatchInput(InputObject);
3817	<	end;
3818	<
3819	<	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
3820	<	begin
3821	<	InternalBatchOutput(OutputObject);
3822	<	end;
3823	<
3824	<	procedure TIBDataSet.ExecSQL;
3825	<	begin
3826	<	InternalExecQuery;
3827	<	end;
3828	<
3829	<	procedure TIBDataSet.Prepare;
3830	<	begin
3831	<	InternalPrepare;
3832	<	end;
3833	<
3834	<	procedure TIBDataSet.UnPrepare;
3835	<	begin
3836	<	InternalUnPrepare;
3837	<	end;
3838	<
3839	<	function TIBDataSet.GetPrepared: Boolean;
3840	<	begin
3841	<	Result := InternalPrepared;
3842	<	end;
3843	<
3844	<	procedure TIBDataSet.InternalOpen;
3845	<	begin
3846	<	ActivateConnection;
3847	<	ActivateTransaction;
3848	<	InternalSetParamsFromCursor;
3849	<	Inherited InternalOpen;
3850	<	end;
3851	<
3852	<	procedure TIBDataSet.SetFiltered(Value: Boolean);
3853	<	begin
3854	<	if(Filtered <> Value) then
3855	<	begin
3856	<	inherited SetFiltered(value);
3857	<	if Active then
3858	<	begin
3859	<	Close;
3860	<	Open;
3861	<	end;
3862	<	end
3863	<	else
3864	<	inherited SetFiltered(value);
3865	<	end;
3866	<
3867	<	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
3868	<	begin
3869	<	Result := false;
3870	<	if not Assigned(Bookmark) then
3871	<	exit;
3872	<	Result := PInteger(Bookmark)^ < FRecordCount;
3873	<	end;
3874	<
3875	<	function TIBCustomDataSet.GetFieldData(Field: TField;
3876	<	Buffer: Pointer): Boolean;
3877	<	{$IFDEF TBCDFIELD_IS_BCD}
3878	<	var
3879	<	lTempCurr : System.Currency;
3880	<	begin
3881	<	if (Field.DataType = ftBCD) and (Buffer <> nil) then
3882	<	begin
3883	<	Result := InternalGetFieldData(Field, @lTempCurr);
3884	<	if Result then
3885	<	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
3886	<	end
3887	<	else
3888	<	{$ELSE}
3889	<	begin
3890	<	{$ENDIF}
3891	<	Result := InternalGetFieldData(Field, Buffer);
3892	<	end;
3893	<
3894	<	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
3895	<	NativeFormat: Boolean): Boolean;
3896	<	begin
3897	<	if (Field.DataType = ftBCD) and not NativeFormat then
3898	<	Result := InternalGetFieldData(Field, Buffer)
3899	<	else
3900	<	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
3901	<	end;
3902	<
3903	<	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
3904	<	{$IFDEF TDBDFIELD_IS_BCD}
3905	<	var
3906	<	lTempCurr : System.Currency;
3907	<	begin
3908	<	if (Field.DataType = ftBCD) and (Buffer <> nil) then
3909	<	begin
3910	<	BCDToCurr(TBCD(Buffer^), lTempCurr);
3911	<	InternalSetFieldData(Field, @lTempCurr);
3912	<	end
3913	<	else
3914	<	{$ELSE}
3915	<	begin
3916	<	{$ENDIF}
3917	<	InternalSetFieldData(Field, Buffer);
3918	<	end;
3919	<
3920	<	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
3921	<	NativeFormat: Boolean);
3922	<	begin
3923	<	if (not NativeFormat) and (Field.DataType = ftBCD) then
3924	<	InternalSetfieldData(Field, Buffer)
3925	<	else
3926	<	inherited SetFieldData(Field, buffer, NativeFormat);
3927	<	end;
3928	<
3929	<	{ TIBDataSetUpdateObject }
3930	<
3931	<	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
3932	<	begin
3933	<	inherited Create(AOwner);
3934	<	FRefreshSQL := TStringList.Create;
3935	<	end;
3936	<
3937	<	destructor TIBDataSetUpdateObject.Destroy;
3938	<	begin
3939	<	FRefreshSQL.Free;
3940	<	inherited Destroy;
3941	<	end;
3942	<
3943	<	procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings);
3944	<	begin
3945	<	FRefreshSQL.Assign(Value);
3946	<	end;
3947	<
3948	<	procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
3949	<	begin
3950	<	if not Assigned(DataSet) then Exit;
3951	<	DataSet.SetInternalSQLParams(Query, buff);
3952	<	end;
3953	<
3954	<	{ TIBDSBlobStream }
3955	<	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
3956	<	Mode: TBlobStreamMode);
3957	<	begin
3958	<	FField := AField;
3959	<	FBlobStream := ABlobStream;
3960	<	FBlobStream.Seek(0, soFromBeginning);
3961	<	if (Mode = bmWrite) then
3962	<	FBlobStream.Truncate;
3963	<	end;
3964	<
3965	<	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
3966	<	begin
3967	<	result := FBlobStream.Read(Buffer, Count);
3968	<	end;
3969	<
3970	<	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
3971	<	begin
3972	<	result := FBlobStream.Seek(Offset, Origin);
3973	<	end;
3974	<
3975	<	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
3976	<	begin
3977	<	FBlobStream.SetSize(NewSize);
3978	<	end;
3979	<
3980	<	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
3981	<	begin
3982	<	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
3983	<	IBError(ibxeNotEditing, [nil]);
3984	<	TIBCustomDataSet(FField.DataSet).RecordModified(True);
3985	<	TBlobField(FField).Modified := true;
3986	<	result := FBlobStream.Write(Buffer, Count);
3987	<	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
3988	<	end;
3989	<
3990	<	{ TIBGenerator }
3991	<
3992	<	procedure TIBGenerator.SetIncrement(const AValue: integer);
3993	<	begin
3994	<	if AValue < 0 then
3995	<	raise Exception.Create('A Generator Increment cannot be negative');
3996	<	FIncrement := AValue
3997	<	end;
3998	<
3999	<	function TIBGenerator.GetNextValue(ADatabase: TIBDatabase;
4000	<	ATransaction: TIBTransaction): integer;
4001	<	begin
4002	<	with TIBSQL.Create(nil) do
4003	<	try
4004	<	Database := ADatabase;
4005	<	Transaction := ATransaction;
4006	<	if not assigned(Database) then
4007	<	IBError(ibxeCannotSetDatabase,[]);
4008	<	if not assigned(Transaction) then
4009	<	IBError(ibxeCannotSetTransaction,[]);
4010	<	with Transaction do
4011	<	if not InTransaction then StartTransaction;
4012	<	SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]);
4013	<	Prepare;
4014	<	ExecQuery;
4015	<	try
4016	<	Result := FieldByName('ID').AsInteger
4017	<	finally
4018	<	Close
4019	<	end;
4020	<	finally
4021	<	Free
4022	<	end;
4023	<	end;
4024	<
4025	<	constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
4026	<	begin
4027	<	FOwner := Owner;
4028	<	FIncrement := 1;
4029	<	end;
4030	<
4031	<
4032	<	procedure TIBGenerator.Apply;
4033	<	begin
4034	<	if (FGeneratorName <> '') and (FFieldName <> '')  then
4035	<	Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction);
4036	<	end;
4037	<
4038	<	end.
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 IBCustomDataSet;
35	>
36	>	{$Mode Delphi}
37	>
38	>	{$IFDEF DELPHI}
39	>	{$DEFINE TDBDFIELD_IS_BCD}
40	>	{$ENDIF}
41	>
42	>	interface
43	>
44	>	uses
45	>	{$IFDEF WINDOWS }
46	>	Windows,
47	>	{$ELSE}
48	>	unix,
49	>	{$ENDIF}
50	>	SysUtils, Classes, Forms, Controls, IBDatabase,
51	>	IBExternals, IB, IBHeader,  IBSQL, Db,
52	>	IBUtils, IBBlob;
53	>
54	>	const
55	>	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
56	>	UniCache           =  2;     { Uni-directional cache is 2 records big }
57	>
58	>	type
59	>	TIBCustomDataSet = class;
60	>	TIBDataSet = class;
61	>
62	>	{ TIBDataSetUpdateObject }
63	>
64	>	TIBDataSetUpdateObject = class(TComponent)
65	>	private
66	>	FRefreshSQL: TStrings;
67	>	procedure SetRefreshSQL(value: TStrings);
68	>	protected
69	>	function GetDataSet: TIBCustomDataSet; virtual; abstract;
70	>	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
71	>	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
72	>	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
73	>	procedure InternalSetParams(Query: TIBSQL; buff: PChar);
74	>	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
75	>	public
76	>	constructor Create(AOwner: TComponent); override;
77	>	destructor Destroy; override;
78	>	published
79	>	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
80	>	end;
81	>
82	>	TBlobDataArray = array[0..0] of TIBBlobStream;
83	>	PBlobDataArray = ^TBlobDataArray;
84	>
85	>	{ TIBCustomDataSet }
86	>	TFieldData = record
87	>	fdDataType: Short;
88	>	fdDataScale: Short;
89	>	fdNullable: Boolean;
90	>	fdIsNull: Boolean;
91	>	fdDataSize: Short;
92	>	fdDataLength: Short;
93	>	fdDataOfs: Integer;
94	>	end;
95	>	PFieldData = ^TFieldData;
96	>
97	>	TCachedUpdateStatus = (
98	>	cusUnmodified, cusModified, cusInserted,
99	>	cusDeleted, cusUninserted
100	>	);
101	>	TIBDBKey = record
102	>	DBKey: array[0..7] of Byte;
103	>	end;
104	>	PIBDBKey = ^TIBDBKey;
105	>
106	>	TRecordData = record
107	>	rdBookmarkFlag: TBookmarkFlag;
108	>	rdFieldCount: Short;
109	>	rdRecordNumber: Integer;
110	>	rdCachedUpdateStatus: TCachedUpdateStatus;
111	>	rdUpdateStatus: TUpdateStatus;
112	>	rdSavedOffset: DWORD;
113	>	rdDBKey: TIBDBKey;
114	>	rdFields: array[1..1] of TFieldData;
115	>	end;
116	>	PRecordData = ^TRecordData;
117	>
118	>	{ TIBStringField allows us to have strings longer than 8196 }
119	>
120	>	TIBStringField = class(TStringField)
121	>	public
122	>	constructor create(AOwner: TComponent); override;
123	>	class procedure CheckTypeSize(Value: Integer); override;
124	>	function GetAsString: string; override;
125	>	function GetAsVariant: Variant; override;
126	>	function GetValue(var Value: string): Boolean;
127	>	procedure SetAsString(const Value: string); override;
128	>	end;
129	>
130	>	{ TIBBCDField }
131	>	{  Actually, there is no BCD involved in this type,
132	>	instead it deals with currency types.
133	>	In IB, this is an encapsulation of Numeric (x, y)
134	>	where x < 18 and y <= 4.
135	>	Note: y > 4 will default to Floats
136	>	}
137	>	TIBBCDField = class(TBCDField)
138	>	protected
139	>	class procedure CheckTypeSize(Value: Integer); override;
140	>	function GetAsCurrency: Currency; override;
141	>	function GetAsString: string; override;
142	>	function GetAsVariant: Variant; override;
143	>	function GetDataSize: Integer; override;
144	>	public
145	>	constructor Create(AOwner: TComponent); override;
146	>	published
147	>	property Size default 8;
148	>	end;
149	>
150	>	TIBDataLink = class(TDetailDataLink)
151	>	private
152	>	FDataSet: TIBCustomDataSet;
153	>	protected
154	>	procedure ActiveChanged; override;
155	>	procedure RecordChanged(Field: TField); override;
156	>	function GetDetailDataSet: TDataSet; override;
157	>	procedure CheckBrowseMode; override;
158	>	public
159	>	constructor Create(ADataSet: TIBCustomDataSet);
160	>	destructor Destroy; override;
161	>	end;
162	>
163	>	TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord);
164	>
165	>	{ TIBGenerator }
166	>
167	>	TIBGenerator = class(TPersistent)
168	>	private
169	>	FOwner: TIBCustomDataSet;
170	>	FApplyOnEvent: TIBGeneratorApplyOnEvent;
171	>	FFieldName: string;
172	>	FGeneratorName: string;
173	>	FIncrement: integer;
174	>	procedure SetIncrement(const AValue: integer);
175	>	protected
176	>	function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer;
177	>	public
178	>	constructor Create(Owner: TIBCustomDataSet);
179	>	procedure Apply;
180	>	property Owner: TIBCustomDataSet read FOwner;
181	>	published
182	>	property Generator: string read FGeneratorName write FGeneratorName;
183	>	property Field: string read FFieldName write FFieldName;
184	>	property Increment: integer read FIncrement write SetIncrement default 1;
185	>	property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
186	>	end;
187	>
188	>	{ TIBCustomDataSet }
189	>	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
190	>
191	>	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
192	>	UpdateKind: TUpdateKind; var UpdateAction: TIBUpdateAction)
193	>	of object;
194	>	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
195	>	var UpdateAction: TIBUpdateAction) of object;
196	>
197	>	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
198	>
199	>	TIBCustomDataSet = class(TDataset)
200	>	private
201	>	FGenerateParamNames: Boolean;
202	>	FGeneratorField: TIBGenerator;
203	>	FNeedsRefresh: Boolean;
204	>	FForcedRefresh: Boolean;
205	>	FDidActivate: Boolean;
206	>	FIBLoaded: Boolean;
207	>	FBase: TIBBase;
208	>	FBlobCacheOffset: Integer;
209	>	FBlobStreamList: TList;
210	>	FBufferChunks: Integer;
211	>	FBufferCache,
212	>	FOldBufferCache: PChar;
213	>	FBufferChunkSize,
214	>	FCacheSize,
215	>	FOldCacheSize: Integer;
216	>	FFilterBuffer: PChar;
217	>	FBPos,
218	>	FOBPos,
219	>	FBEnd,
220	>	FOBEnd: DWord;
221	>	FCachedUpdates: Boolean;
222	>	FCalcFieldsOffset: Integer;
223	>	FCurrentRecord: Long;
224	>	FDeletedRecords: Long;
225	>	FModelBuffer,
226	>	FOldBuffer: PChar;
227	>	FOpen: Boolean;
228	>	FInternalPrepared: Boolean;
229	>	FQDelete,
230	>	FQInsert,
231	>	FQRefresh,
232	>	FQSelect,
233	>	FQModify: TIBSQL;
234	>	FRecordBufferSize: Integer;
235	>	FRecordCount: Integer;
236	>	FRecordSize: Integer;
237	>	FUniDirectional: Boolean;
238	>	FUpdateMode: TUpdateMode;
239	>	FUpdateObject: TIBDataSetUpdateObject;
240	>	FParamCheck: Boolean;
241	>	FUpdatesPending: Boolean;
242	>	FUpdateRecordTypes: TIBUpdateRecordTypes;
243	>	FMappedFieldPosition: array of Integer;
244	>	FDataLink: TIBDataLink;
245	>
246	>	FBeforeDatabaseDisconnect,
247	>	FAfterDatabaseDisconnect,
248	>	FDatabaseFree: TNotifyEvent;
249	>	FOnUpdateError: TIBUpdateErrorEvent;
250	>	FOnUpdateRecord: TIBUpdateRecordEvent;
251	>	FBeforeTransactionEnd,
252	>	FAfterTransactionEnd,
253	>	FTransactionFree: TNotifyEvent;
254	>	FAliasNameMap: array of string;
255	>
256	>	function GetSelectStmtHandle: TISC_STMT_HANDLE;
257	>	procedure SetUpdateMode(const Value: TUpdateMode);
258	>	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
259	>
260	>	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
261	>	procedure AdjustRecordOnInsert(Buffer: Pointer);
262	>	function CanEdit: Boolean;
263	>	function CanInsert: Boolean;
264	>	function CanDelete: Boolean;
265	>	function CanRefresh: Boolean;
266	>	procedure CheckEditState;
267	>	procedure ClearBlobCache;
268	>	procedure CopyRecordBuffer(Source, Dest: Pointer);
269	>	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
270	>	procedure DoAfterDatabaseDisconnect(Sender: TObject);
271	>	procedure DoDatabaseFree(Sender: TObject);
272	>	procedure DoBeforeTransactionEnd(Sender: TObject);
273	>	procedure DoAfterTransactionEnd(Sender: TObject);
274	>	procedure DoTransactionFree(Sender: TObject);
275	>	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
276	>	Buffer: PChar);
277	>	function GetDatabase: TIBDatabase;
278	>	function GetDBHandle: PISC_DB_HANDLE;
279	>	function GetDeleteSQL: TStrings;
280	>	function GetInsertSQL: TStrings;
281	>	function GetSQLParams: TIBXSQLDA;
282	>	function GetRefreshSQL: TStrings;
283	>	function GetSelectSQL: TStrings;
284	>	function GetStatementType: TIBSQLTypes;
285	>	function GetModifySQL: TStrings;
286	>	function GetTransaction: TIBTransaction;
287	>	function GetTRHandle: PISC_TR_HANDLE;
288	>	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
289	>	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
290	>	Options: TLocateOptions): Boolean; virtual;
291	>	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
292	>	procedure InternalRevertRecord(RecordNumber: Integer); virtual;
293	>	function IsVisible(Buffer: PChar): Boolean;
294	>	procedure SaveOldBuffer(Buffer: PChar);
295	>	procedure SetBufferChunks(Value: Integer);
296	>	procedure SetDatabase(Value: TIBDatabase);
297	>	procedure SetDeleteSQL(Value: TStrings);
298	>	procedure SetInsertSQL(Value: TStrings);
299	>	procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
300	>	procedure SetRefreshSQL(Value: TStrings);
301	>	procedure SetSelectSQL(Value: TStrings);
302	>	procedure SetModifySQL(Value: TStrings);
303	>	procedure SetTransaction(Value: TIBTransaction);
304	>	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
305	>	procedure SetUniDirectional(Value: Boolean);
306	>	procedure RefreshParams;
307	>	procedure SQLChanging(Sender: TObject); virtual;
308	>	function AdjustPosition(FCache: PChar; Offset: DWORD;
309	>	Origin: Integer): DWORD;
310	>	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
311	>	Buffer: PChar);
312	>	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
313	>	ReadOldBuffer: Boolean);
314	>	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
315	>	Buffer: PChar);
316	>	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
317	>	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
318	>	DoCheck: Boolean): TGetResult; virtual;
319	>
320	>	protected
321	>	procedure ActivateConnection;
322	>	function ActivateTransaction: Boolean;
323	>	procedure DeactivateTransaction;
324	>	procedure CheckDatasetClosed;
325	>	procedure CheckDatasetOpen;
326	>	procedure FieldDefsFromQuery(SourceQuery: TIBSQL);
327	>	function GetActiveBuf: PChar;
328	>	procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
329	>	procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
330	>	procedure InternalPrepare; virtual;
331	>	procedure InternalUnPrepare; virtual;
332	>	procedure InternalExecQuery; virtual;
333	>	procedure InternalRefreshRow; virtual;
334	>	procedure InternalSetParamsFromCursor; virtual;
335	>	procedure CheckNotUniDirectional;
336	>
337	>	(*    { IProviderSupport }
338	>	procedure PSEndTransaction(Commit: Boolean); override;
339	>	function PSExecuteStatement(const ASQL: string; AParams: TParams;
340	>	ResultSet: Pointer = nil): Integer; override;
341	>	function PsGetTableName: string; override;
342	>	function PSGetQuoteChar: string; override;
343	>	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
344	>	function PSInTransaction: Boolean; override;
345	>	function PSIsSQLBased: Boolean; override;
346	>	function PSIsSQLSupported: Boolean; override;
347	>	procedure PSStartTransaction; override;
348	>	procedure PSReset; override;
349	>	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
350	>	*)
351	>	{ TDataSet support }
352	>	procedure InternalInsert; override;
353	>	procedure InitRecord(Buffer: PChar); override;
354	>	procedure Disconnect; virtual;
355	>	function ConstraintsStored: Boolean;
356	>	procedure ClearCalcFields(Buffer: PChar); override;
357	>	function AllocRecordBuffer: PChar; override;
358	>	procedure DoBeforeDelete; override;
359	>	procedure DoBeforeEdit; override;
360	>	procedure DoBeforeInsert; override;
361	>	procedure DoAfterInsert; override;
362	>	procedure DoBeforePost; override;
363	>	procedure FreeRecordBuffer(var Buffer: PChar); override;
364	>	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
365	>	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
366	>	function GetCanModify: Boolean; override;
367	>	function GetDataSource: TDataSource; override;
368	>	function GetDBAliasName(FieldNo: integer): string;
369	>	function GetFieldDefFromAlias(aliasName: string): TFieldDef;
370	>	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
371	>	function GetRecNo: Integer; override;
372	>	function GetRecord(Buffer: PChar; GetMode: TGetMode;
373	>	DoCheck: Boolean): TGetResult; override;
374	>	function GetRecordCount: Integer; override;
375	>	function GetRecordSize: Word; override;
376	>	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
377	>	procedure InternalCancel; override;
378	>	procedure InternalClose; override;
379	>	procedure InternalDelete; override;
380	>	procedure InternalFirst; override;
381	>	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
382	>	procedure InternalGotoBookmark(Bookmark: Pointer); override;
383	>	procedure InternalHandleException; override;
384	>	procedure InternalInitFieldDefs; override;
385	>	procedure InternalInitRecord(Buffer: PChar); override;
386	>	procedure InternalLast; override;
387	>	procedure InternalOpen; override;
388	>	procedure InternalPost; override;
389	>	procedure InternalRefresh; override;
390	>	procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
391	>	procedure InternalSetToRecord(Buffer: PChar); override;
392	>	function IsCursorOpen: Boolean; override;
393	>	procedure ReQuery;
394	>	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
395	>	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
396	>	procedure SetCachedUpdates(Value: Boolean);
397	>	procedure SetDataSource(Value: TDataSource);
398	>	procedure SetGenerateParamNames(AValue: Boolean); virtual;
399	>	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
400	>	procedure SetFieldData(Field : TField; Buffer : Pointer;
401	>	NativeFormat : Boolean); overload; override;
402	>	procedure SetRecNo(Value: Integer); override;
403	>
404	>	protected
405	>	{Likely to be made public by descendant classes}
406	>	property SQLParams: TIBXSQLDA read GetSQLParams;
407	>	property Params: TIBXSQLDA read GetSQLParams;
408	>	property InternalPrepared: Boolean read FInternalPrepared;
409	>	property QDelete: TIBSQL read FQDelete;
410	>	property QInsert: TIBSQL read FQInsert;
411	>	property QRefresh: TIBSQL read FQRefresh;
412	>	property QSelect: TIBSQL read FQSelect;
413	>	property QModify: TIBSQL read FQModify;
414	>	property StatementType: TIBSQLTypes read GetStatementType;
415	>	property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle;
416	>
417	>	{Likely to be made published by descendant classes}
418	>	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
419	>	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
420	>	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
421	>	property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
422	>	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
423	>	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
424	>	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
425	>	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
426	>	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
427	>	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
428	>	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
429	>
430	>	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
431	>	write FBeforeDatabaseDisconnect;
432	>	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
433	>	write FAfterDatabaseDisconnect;
434	>	property DatabaseFree: TNotifyEvent read FDatabaseFree
435	>	write FDatabaseFree;
436	>	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
437	>	write FBeforeTransactionEnd;
438	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
439	>	write FAfterTransactionEnd;
440	>	property TransactionFree: TNotifyEvent read FTransactionFree
441	>	write FTransactionFree;
442	>
443	>	public
444	>	constructor Create(AOwner: TComponent); override;
445	>	destructor Destroy; override;
446	>	procedure ApplyUpdates;
447	>	function CachedUpdateStatus: TCachedUpdateStatus;
448	>	procedure CancelUpdates;
449	>	procedure FetchAll;
450	>	function LocateNext(const KeyFields: string; const KeyValues: Variant;
451	>	Options: TLocateOptions): Boolean;
452	>	procedure RecordModified(Value: Boolean);
453	>	procedure RevertRecord;
454	>	procedure Undelete;
455	>
456	>	{ TDataSet support methods }
457	>	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
458	>	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
459	>	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
460	>	function GetCurrentRecord(Buffer: PChar): Boolean; override;
461	>	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
462	>	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
463	>	function GetFieldData(Field : TField; Buffer : Pointer;
464	>	NativeFormat : Boolean) : Boolean; overload; override;
465	>	property GenerateParamNames: Boolean read FGenerateParamNames write SetGenerateParamNames;
466	>	function Locate(const KeyFields: string; const KeyValues: Variant;
467	>	Options: TLocateOptions): Boolean; override;
468	>	function Lookup(const KeyFields: string; const KeyValues: Variant;
469	>	const ResultFields: string): Variant; override;
470	>	function UpdateStatus: TUpdateStatus; override;
471	>	function IsSequenced: Boolean; override;
472	>	function ParamByName(ParamName: String): TIBXSQLVAR;
473	>	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
474	>	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
475	>	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
476	>	property UpdatesPending: Boolean read FUpdatesPending;
477	>	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
478	>	write SetUpdateRecordTypes;
479	>
480	>	published
481	>	property Database: TIBDatabase read GetDatabase write SetDatabase;
482	>	property Transaction: TIBTransaction read GetTransaction
483	>	write SetTransaction;
484	>	property ForcedRefresh: Boolean read FForcedRefresh
485	>	write FForcedRefresh default False;
486	>	property AutoCalcFields;
487	>
488	>	property AfterCancel;
489	>	property AfterClose;
490	>	property AfterDelete;
491	>	property AfterEdit;
492	>	property AfterInsert;
493	>	property AfterOpen;
494	>	property AfterPost;
495	>	property AfterRefresh;
496	>	property AfterScroll;
497	>	property BeforeCancel;
498	>	property BeforeClose;
499	>	property BeforeDelete;
500	>	property BeforeEdit;
501	>	property BeforeInsert;
502	>	property BeforeOpen;
503	>	property BeforePost;
504	>	property BeforeRefresh;
505	>	property BeforeScroll;
506	>	property OnCalcFields;
507	>	property OnDeleteError;
508	>	property OnEditError;
509	>	property OnNewRecord;
510	>	property OnPostError;
511	>	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
512	>	write FOnUpdateError;
513	>	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
514	>	write FOnUpdateRecord;
515	>	end;
516	>
517	>	TIBDataSet = class(TIBCustomDataSet)
518	>	private
519	>	function GetPrepared: Boolean;
520	>
521	>	protected
522	>	procedure SetFiltered(Value: Boolean); override;
523	>	procedure InternalOpen; override;
524	>
525	>	public
526	>	procedure Prepare;
527	>	procedure UnPrepare;
528	>	procedure BatchInput(InputObject: TIBBatchInput);
529	>	procedure BatchOutput(OutputObject: TIBBatchOutput);
530	>	procedure ExecSQL;
531	>
532	>	public
533	>	property Params;
534	>	property Prepared : Boolean read GetPrepared;
535	>	property QDelete;
536	>	property QInsert;
537	>	property QRefresh;
538	>	property QSelect;
539	>	property QModify;
540	>	property StatementType;
541	>	property SelectStmtHandle;
542	>
543	>	published
544	>	{ TIBCustomDataSet }
545	>	property BufferChunks;
546	>	property CachedUpdates;
547	>	property DeleteSQL;
548	>	property InsertSQL;
549	>	property RefreshSQL;
550	>	property SelectSQL;
551	>	property ModifySQL;
552	>	property GeneratorField;
553	>	property GenerateParamNames;
554	>	property ParamCheck;
555	>	property UniDirectional;
556	>	property Filtered;
557	>
558	>	property BeforeDatabaseDisconnect;
559	>	property AfterDatabaseDisconnect;
560	>	property DatabaseFree;
561	>	property BeforeTransactionEnd;
562	>	property AfterTransactionEnd;
563	>	property TransactionFree;
564	>
565	>	{ TIBDataSet }
566	>	property Active;
567	>	property AutoCalcFields;
568	>	property DataSource read GetDataSource write SetDataSource;
569	>
570	>	property AfterCancel;
571	>	property AfterClose;
572	>	property AfterDelete;
573	>	property AfterEdit;
574	>	property AfterInsert;
575	>	property AfterOpen;
576	>	property AfterPost;
577	>	property AfterScroll;
578	>	property BeforeCancel;
579	>	property BeforeClose;
580	>	property BeforeDelete;
581	>	property BeforeEdit;
582	>	property BeforeInsert;
583	>	property BeforeOpen;
584	>	property BeforePost;
585	>	property BeforeScroll;
586	>	property OnCalcFields;
587	>	property OnDeleteError;
588	>	property OnEditError;
589	>	property OnFilterRecord;
590	>	property OnNewRecord;
591	>	property OnPostError;
592	>	end;
593	>
594	>	{ TIBDSBlobStream }
595	>	TIBDSBlobStream = class(TStream)
596	>	protected
597	>	FField: TField;
598	>	FBlobStream: TIBBlobStream;
599	>	public
600	>	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
601	>	Mode: TBlobStreamMode);
602	>	function Read(var Buffer; Count: Longint): Longint; override;
603	>	function Seek(Offset: Longint; Origin: Word): Longint; override;
604	>	procedure SetSize(NewSize: Longint); override;
605	>	function Write(const Buffer; Count: Longint): Longint; override;
606	>	end;
607	>
608	>	const
609	>	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
610	>	nil,                { ftUnknown }
611	>	TIBStringField,     { ftString }
612	>	TSmallintField,     { ftSmallint }
613	>	TIntegerField,      { ftInteger }
614	>	TWordField,         { ftWord }
615	>	TBooleanField,      { ftBoolean }
616	>	TFloatField,        { ftFloat }
617	>	TCurrencyField,     { ftCurrency }
618	>	TIBBCDField,        { ftBCD }
619	>	TDateField,         { ftDate }
620	>	TTimeField,         { ftTime }
621	>	TDateTimeField,     { ftDateTime }
622	>	TBytesField,        { ftBytes }
623	>	TVarBytesField,     { ftVarBytes }
624	>	TAutoIncField,      { ftAutoInc }
625	>	TBlobField,         { ftBlob }
626	>	TMemoField,         { ftMemo }
627	>	TGraphicField,      { ftGraphic }
628	>	TBlobField,         { ftFmtMemo }
629	>	TBlobField,         { ftParadoxOle }
630	>	TBlobField,         { ftDBaseOle }
631	>	TBlobField,         { ftTypedBinary }
632	>	nil,                { ftCursor }
633	>	TStringField,       { ftFixedChar }
634	>	TWideStringField,    { ftWideString }
635	>	TLargeIntField,     { ftLargeInt }
636	>	nil,          { ftADT }
637	>	nil,        { ftArray }
638	>	nil,    { ftReference }
639	>	nil,     { ftDataSet }
640	>	TBlobField,         { ftOraBlob }
641	>	TMemoField,         { ftOraClob }
642	>	TVariantField,      { ftVariant }
643	>	nil,    { ftInterface }
644	>	nil,     { ftIDispatch }
645	>	TGuidField,        { ftGuid }
646	>	TDateTimeField,    {ftTimestamp}
647	>	TIBBCDField,       {ftFMTBcd}
648	>	nil,  {ftFixedWideChar}
649	>	TWideMemoField);   {ftWideMemo}
650	>	(*
651	>	TADTField,          { ftADT }
652	>	TArrayField,        { ftArray }
653	>	TReferenceField,    { ftReference }
654	>	TDataSetField,     { ftDataSet }
655	>	TBlobField,         { ftOraBlob }
656	>	TMemoField,         { ftOraClob }
657	>	TVariantField,      { ftVariant }
658	>	TInterfaceField,    { ftInterface }
659	>	TIDispatchField,     { ftIDispatch }
660	>	TGuidField);        { ftGuid } *)
661	>	(*var
662	>	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
663	>
664	>	implementation
665	>
666	>	uses IBIntf, Variants, FmtBCD;
667	>
668	>	const FILE_BEGIN = 0;
669	>	FILE_CURRENT = 1;
670	>	FILE_END = 2;
671	>
672	>	type
673	>
674	>	TFieldNode = class(TObject)
675	>	protected
676	>	FieldName : String;
677	>	COMPUTED_BLR : Boolean;
678	>	DEFAULT_VALUE : boolean;
679	>	NextField : TFieldNode;
680	>	end;
681	>
682	>	TRelationNode = class(TObject)
683	>	protected
684	>	RelationName : String;
685	>	FieldNodes : TFieldNode;
686	>	NextRelation : TRelationNode;
687	>	end;
688	>
689	>
690	>	{ TIBStringField}
691	>
692	>	constructor TIBStringField.Create(AOwner: TComponent);
693	>	begin
694	>	inherited Create(AOwner);
695	>	end;
696	>
697	>	class procedure TIBStringField.CheckTypeSize(Value: Integer);
698	>	begin
699	>	{ don't check string size. all sizes valid }
700	>	end;
701	>
702	>	function TIBStringField.GetAsString: string;
703	>	begin
704	>	if not GetValue(Result) then Result := '';
705	>	end;
706	>
707	>	function TIBStringField.GetAsVariant: Variant;
708	>	var
709	>	S: string;
710	>	begin
711	>	if GetValue(S) then Result := S else Result := Null;
712	>	end;
713	>
714	>	function TIBStringField.GetValue(var Value: string): Boolean;
715	>	var
716	>	Buffer: PChar;
717	>	begin
718	>	Buffer := nil;
719	>	IBAlloc(Buffer, 0, Size + 1);
720	>	try
721	>	Result := GetData(Buffer);
722	>	if Result then
723	>	begin
724	>	Value := string(Buffer);
725	>	if Transliterate and (Value <> '') then
726	>	DataSet.Translate(PChar(Value), PChar(Value), False);
727	>	end
728	>	finally
729	>	FreeMem(Buffer);
730	>	end;
731	>	end;
732	>
733	>	procedure TIBStringField.SetAsString(const Value: string);
734	>	var
735	>	Buffer: PChar;
736	>	begin
737	>	Buffer := nil;
738	>	IBAlloc(Buffer, 0, Size + 1);
739	>	try
740	>	StrLCopy(Buffer, PChar(Value), Size);
741	>	if Transliterate then
742	>	DataSet.Translate(Buffer, Buffer, True);
743	>	SetData(Buffer);
744	>	finally
745	>	FreeMem(Buffer);
746	>	end;
747	>	end;
748	>
749	>	{ TIBBCDField }
750	>
751	>	constructor TIBBCDField.Create(AOwner: TComponent);
752	>	begin
753	>	inherited Create(AOwner);
754	>	SetDataType(ftBCD);
755	>	Size := 8;
756	>	end;
757	>
758	>	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
759	>	begin
760	>	{ No need to check as the base type is currency, not BCD }
761	>	end;
762	>
763	>	function TIBBCDField.GetAsCurrency: Currency;
764	>	begin
765	>	if not GetValue(Result) then
766	>	Result := 0;
767	>	end;
768	>
769	>	function TIBBCDField.GetAsString: string;
770	>	var
771	>	C: System.Currency;
772	>	begin
773	>	if GetValue(C) then
774	>	Result := CurrToStr(C)
775	>	else
776	>	Result := '';
777	>	end;
778	>
779	>	function TIBBCDField.GetAsVariant: Variant;
780	>	var
781	>	C: System.Currency;
782	>	begin
783	>	if GetValue(C) then
784	>	Result := C
785	>	else
786	>	Result := Null;
787	>	end;
788	>
789	>	function TIBBCDField.GetDataSize: Integer;
790	>	begin
791	>	{$IFDEF TBCDFIELD_IS_BCD}
792	>	Result := 8;
793	>	{$ELSE}
794	>	Result := inherited GetDataSize
795	>	{$ENDIF}
796	>	end;
797	>
798	>	{ TIBDataLink }
799	>
800	>	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
801	>	begin
802	>	inherited Create;
803	>	FDataSet := ADataSet;
804	>	end;
805	>
806	>	destructor TIBDataLink.Destroy;
807	>	begin
808	>	FDataSet.FDataLink := nil;
809	>	inherited Destroy;
810	>	end;
811	>
812	>
813	>	procedure TIBDataLink.ActiveChanged;
814	>	begin
815	>	if FDataSet.Active then
816	>	FDataSet.RefreshParams;
817	>	end;
818	>
819	>
820	>	function TIBDataLink.GetDetailDataSet: TDataSet;
821	>	begin
822	>	Result := FDataSet;
823	>	end;
824	>
825	>	procedure TIBDataLink.RecordChanged(Field: TField);
826	>	begin
827	>	if (Field = nil) and FDataSet.Active then
828	>	FDataSet.RefreshParams;
829	>	end;
830	>
831	>	procedure TIBDataLink.CheckBrowseMode;
832	>	begin
833	>	if FDataSet.Active then
834	>	FDataSet.CheckBrowseMode;
835	>	end;
836	>
837	>	{ TIBCustomDataSet }
838	>
839	>	constructor TIBCustomDataSet.Create(AOwner: TComponent);
840	>	begin
841	>	inherited Create(AOwner);
842	>	FIBLoaded := False;
843	>	CheckIBLoaded;
844	>	FIBLoaded := True;
845	>	FBase := TIBBase.Create(Self);
846	>	FCurrentRecord := -1;
847	>	FDeletedRecords := 0;
848	>	FUniDirectional := False;
849	>	FBufferChunks := BufferCacheSize;
850	>	FBlobStreamList := TList.Create;
851	>	FGeneratorField := TIBGenerator.Create(self);
852	>	FDataLink := TIBDataLink.Create(Self);
853	>	FQDelete := TIBSQL.Create(Self);
854	>	FQDelete.OnSQLChanging := SQLChanging;
855	>	FQDelete.GoToFirstRecordOnExecute := False;
856	>	FQInsert := TIBSQL.Create(Self);
857	>	FQInsert.OnSQLChanging := SQLChanging;
858	>	FQInsert.GoToFirstRecordOnExecute := False;
859	>	FQRefresh := TIBSQL.Create(Self);
860	>	FQRefresh.OnSQLChanging := SQLChanging;
861	>	FQRefresh.GoToFirstRecordOnExecute := False;
862	>	FQSelect := TIBSQL.Create(Self);
863	>	FQSelect.OnSQLChanging := SQLChanging;
864	>	FQSelect.GoToFirstRecordOnExecute := False;
865	>	FQModify := TIBSQL.Create(Self);
866	>	FQModify.OnSQLChanging := SQLChanging;
867	>	FQModify.GoToFirstRecordOnExecute := False;
868	>	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
869	>	FParamCheck := True;
870	>	FGenerateParamNames := False;
871	>	FForcedRefresh := False;
872	>	{Bookmark Size is Integer for IBX}
873	>	BookmarkSize := SizeOf(Integer);
874	>	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
875	>	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
876	>	FBase.OnDatabaseFree := DoDatabaseFree;
877	>	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
878	>	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
879	>	FBase.OnTransactionFree := DoTransactionFree;
880	>	if AOwner is TIBDatabase then
881	>	Database := TIBDatabase(AOwner)
882	>	else
883	>	if AOwner is TIBTransaction then
884	>	Transaction := TIBTransaction(AOwner);
885	>	end;
886	>
887	>	destructor TIBCustomDataSet.Destroy;
888	>	begin
889	>	if Active then Active := false;
890	>	if FIBLoaded then
891	>	begin
892	>	if assigned(FGeneratorField) then FGeneratorField.Free;
893	>	FDataLink.Free;
894	>	FBase.Free;
895	>	ClearBlobCache;
896	>	FBlobStreamList.Free;
897	>	FreeMem(FBufferCache);
898	>	FBufferCache := nil;
899	>	FreeMem(FOldBufferCache);
900	>	FOldBufferCache := nil;
901	>	FCacheSize := 0;
902	>	FOldCacheSize := 0;
903	>	FMappedFieldPosition := nil;
904	>	end;
905	>	inherited Destroy;
906	>	end;
907	>
908	>	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
909	>	TGetResult;
910	>	begin
911	>	while not IsVisible(Buffer) do
912	>	begin
913	>	if GetMode = gmPrior then
914	>	begin
915	>	Dec(FCurrentRecord);
916	>	if FCurrentRecord = -1 then
917	>	begin
918	>	result := grBOF;
919	>	exit;
920	>	end;
921	>	ReadRecordCache(FCurrentRecord, Buffer, False);
922	>	end
923	>	else begin
924	>	Inc(FCurrentRecord);
925	>	if (FCurrentRecord = FRecordCount) then
926	>	begin
927	>	if (not FQSelect.EOF) and (FQSelect.Next <> nil) then
928	>	begin
929	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
930	>	Inc(FRecordCount);
931	>	end
932	>	else begin
933	>	result := grEOF;
934	>	exit;
935	>	end;
936	>	end
937	>	else
938	>	ReadRecordCache(FCurrentRecord, Buffer, False);
939	>	end;
940	>	end;
941	>	result := grOK;
942	>	end;
943	>
944	>	procedure TIBCustomDataSet.ApplyUpdates;
945	>	var
946	>	{$IF FPC_FULLVERSION >= 20700 }
947	>	CurBookmark: TBookmark;
948	>	{$ELSE}
949	>	CurBookmark: string;
950	>	{$ENDIF}
951	>	Buffer: PRecordData;
952	>	CurUpdateTypes: TIBUpdateRecordTypes;
953	>	UpdateAction: TIBUpdateAction;
954	>	UpdateKind: TUpdateKind;
955	>	bRecordsSkipped: Boolean;
956	>
957	>	procedure GetUpdateKind;
958	>	begin
959	>	case Buffer^.rdCachedUpdateStatus of
960	>	cusModified:
961	>	UpdateKind := ukModify;
962	>	cusInserted:
963	>	UpdateKind := ukInsert;
964	>	else
965	>	UpdateKind := ukDelete;
966	>	end;
967	>	end;
968	>
969	>	procedure ResetBufferUpdateStatus;
970	>	begin
971	>	case Buffer^.rdCachedUpdateStatus of
972	>	cusModified:
973	>	begin
974	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
975	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
976	>	end;
977	>	cusInserted:
978	>	begin
979	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
980	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
981	>	end;
982	>	cusDeleted:
983	>	begin
984	>	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
985	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
986	>	end;
987	>	end;
988	>	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
989	>	end;
990	>
991	>	procedure UpdateUsingOnUpdateRecord;
992	>	begin
993	>	UpdateAction := uaFail;
994	>	try
995	>	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
996	>	except
997	>	on E: Exception do
998	>	begin
999	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1000	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1001	>	if UpdateAction = uaFail then
1002	>	raise;
1003	>	end;
1004	>	end;
1005	>	end;
1006	>
1007	>	procedure UpdateUsingUpdateObject;
1008	>	begin
1009	>	try
1010	>	FUpdateObject.Apply(UpdateKind,PChar(Buffer));
1011	>	ResetBufferUpdateStatus;
1012	>	except
1013	>	on E: Exception do
1014	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1015	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1016	>	end;
1017	>	end;
1018	>
1019	>	procedure UpdateUsingInternalquery;
1020	>	begin
1021	>	try
1022	>	case Buffer^.rdCachedUpdateStatus of
1023	>	cusModified:
1024	>	InternalPostRecord(FQModify, Buffer);
1025	>	cusInserted:
1026	>	InternalPostRecord(FQInsert, Buffer);
1027	>	cusDeleted:
1028	>	InternalDeleteRecord(FQDelete, Buffer);
1029	>	end;
1030	>	except
1031	>	on E: EIBError do begin
1032	>	UpdateAction := uaFail;
1033	>	if Assigned(FOnUpdateError) then
1034	>	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
1035	>	case UpdateAction of
1036	>	uaFail: raise;
1037	>	uaAbort: SysUtils.Abort;
1038	>	uaSkip: bRecordsSkipped := True;
1039	>	end;
1040	>	end;
1041	>	end;
1042	>	end;
1043	>
1044	>	begin
1045	>	if State in [dsEdit, dsInsert] then
1046	>	Post;
1047	>	FBase.CheckDatabase;
1048	>	FBase.CheckTransaction;
1049	>	DisableControls;
1050	>	CurBookmark := Bookmark;
1051	>	CurUpdateTypes := FUpdateRecordTypes;
1052	>	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1053	>	try
1054	>	First;
1055	>	bRecordsSkipped := False;
1056	>	while not EOF do
1057	>	begin
1058	>	Buffer := PRecordData(GetActiveBuf);
1059	>	GetUpdateKind;
1060	>	UpdateAction := uaApply;
1061	>	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
1062	>	begin
1063	>	if (Assigned(FOnUpdateRecord)) then
1064	>	UpdateUsingOnUpdateRecord
1065	>	else
1066	>	if Assigned(FUpdateObject) then
1067	>	UpdateUsingUpdateObject;
1068	>	case UpdateAction of
1069	>	uaFail:
1070	>	IBError(ibxeUserAbort, [nil]);
1071	>	uaAbort:
1072	>	SysUtils.Abort;
1073	>	uaApplied:
1074	>	ResetBufferUpdateStatus;
1075	>	uaSkip:
1076	>	bRecordsSkipped := True;
1077	>	uaRetry:
1078	>	Continue;
1079	>	end;
1080	>	end;
1081	>	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
1082	>	begin
1083	>	UpdateUsingInternalquery;
1084	>	UpdateAction := uaApplied;
1085	>	end;
1086	>	Next;
1087	>	end;
1088	>	FUpdatesPending := bRecordsSkipped;
1089	>	finally
1090	>	FUpdateRecordTypes := CurUpdateTypes;
1091	>	Bookmark := CurBookmark;
1092	>	EnableControls;
1093	>	end;
1094	>	end;
1095	>
1096	>	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1097	>	begin
1098	>	FQSelect.BatchInput(InputObject);
1099	>	end;
1100	>
1101	>	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1102	>	var
1103	>	Qry: TIBSQL;
1104	>	begin
1105	>	Qry := TIBSQL.Create(Self);
1106	>	try
1107	>	Qry.Database := FBase.Database;
1108	>	Qry.Transaction := FBase.Transaction;
1109	>	Qry.SQL.Assign(FQSelect.SQL);
1110	>	Qry.BatchOutput(OutputObject);
1111	>	finally
1112	>	Qry.Free;
1113	>	end;
1114	>	end;
1115	>
1116	>	procedure TIBCustomDataSet.CancelUpdates;
1117	>	var
1118	>	CurUpdateTypes: TIBUpdateRecordTypes;
1119	>	begin
1120	>	if State in [dsEdit, dsInsert] then
1121	>	Post;
1122	>	if FCachedUpdates and FUpdatesPending then
1123	>	begin
1124	>	DisableControls;
1125	>	CurUpdateTypes := UpdateRecordTypes;
1126	>	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1127	>	try
1128	>	First;
1129	>	while not EOF do
1130	>	begin
1131	>	if UpdateStatus = usInserted then
1132	>	RevertRecord
1133	>	else
1134	>	begin
1135	>	RevertRecord;
1136	>	Next;
1137	>	end;
1138	>	end;
1139	>	finally
1140	>	UpdateRecordTypes := CurUpdateTypes;
1141	>	First;
1142	>	FUpdatesPending := False;
1143	>	EnableControls;
1144	>	end;
1145	>	end;
1146	>	end;
1147	>
1148	>	procedure TIBCustomDataSet.ActivateConnection;
1149	>	begin
1150	>	if not Assigned(Database) then
1151	>	IBError(ibxeDatabaseNotAssigned, [nil]);
1152	>	if not Assigned(Transaction) then
1153	>	IBError(ibxeTransactionNotAssigned, [nil]);
1154	>	if not Database.Connected then Database.Open;
1155	>	end;
1156	>
1157	>	function TIBCustomDataSet.ActivateTransaction: Boolean;
1158	>	begin
1159	>	Result := False;
1160	>	if not Assigned(Transaction) then
1161	>	IBError(ibxeTransactionNotAssigned, [nil]);
1162	>	if not Transaction.Active then
1163	>	begin
1164	>	Result := True;
1165	>	Transaction.StartTransaction;
1166	>	FDidActivate := True;
1167	>	end;
1168	>	end;
1169	>
1170	>	procedure TIBCustomDataSet.DeactivateTransaction;
1171	>	var
1172	>	i: Integer;
1173	>	begin
1174	>	if not Assigned(Transaction) then
1175	>	IBError(ibxeTransactionNotAssigned, [nil]);
1176	>	with Transaction do
1177	>	begin
1178	>	for i := 0 to SQLObjectCount - 1 do
1179	>	begin
1180	>	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1181	>	begin
1182	>	if TDataSet(SQLObjects[i].owner).Active then
1183	>	begin
1184	>	FDidActivate := False;
1185	>	exit;
1186	>	end;
1187	>	end;
1188	>	end;
1189	>	end;
1190	>	FInternalPrepared := False;
1191	>	if Transaction.InTransaction then
1192	>	Transaction.Commit;
1193	>	FDidActivate := False;
1194	>	end;
1195	>
1196	>	procedure TIBCustomDataSet.CheckDatasetClosed;
1197	>	begin
1198	>	if FOpen then
1199	>	IBError(ibxeDatasetOpen, [nil]);
1200	>	end;
1201	>
1202	>	procedure TIBCustomDataSet.CheckDatasetOpen;
1203	>	begin
1204	>	if not FOpen then
1205	>	IBError(ibxeDatasetClosed, [nil]);
1206	>	end;
1207	>
1208	>	procedure TIBCustomDataSet.CheckNotUniDirectional;
1209	>	begin
1210	>	if UniDirectional then
1211	>	IBError(ibxeDataSetUniDirectional, [nil]);
1212	>	end;
1213	>
1214	>	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1215	>	begin
1216	>	with PRecordData(Buffer)^ do
1217	>	if (State = dsInsert) and (not Modified) then
1218	>	begin
1219	>	rdRecordNumber := FRecordCount;
1220	>	FCurrentRecord := FRecordCount;
1221	>	end;
1222	>	end;
1223	>
1224	>	function TIBCustomDataSet.CanEdit: Boolean;
1225	>	var
1226	>	Buff: PRecordData;
1227	>	begin
1228	>	Buff := PRecordData(GetActiveBuf);
1229	>	result := (FQModify.SQL.Text <> '') or
1230	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1231	>	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1232	>	(FCachedUpdates));
1233	>	end;
1234	>
1235	>	function TIBCustomDataSet.CanInsert: Boolean;
1236	>	begin
1237	>	result := (FQInsert.SQL.Text <> '') or
1238	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1239	>	end;
1240	>
1241	>	function TIBCustomDataSet.CanDelete: Boolean;
1242	>	begin
1243	>	if (FQDelete.SQL.Text <> '') or
1244	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1245	>	result := True
1246	>	else
1247	>	result := False;
1248	>	end;
1249	>
1250	>	function TIBCustomDataSet.CanRefresh: Boolean;
1251	>	begin
1252	>	result := (FQRefresh.SQL.Text <> '') or
1253	>	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1254	>	end;
1255	>
1256	>	procedure TIBCustomDataSet.CheckEditState;
1257	>	begin
1258	>	case State of
1259	>	{ Check all the wsEditMode types }
1260	>	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1261	>	dsNewValue, dsInternalCalc :
1262	>	begin
1263	>	if (State in [dsEdit]) and (not CanEdit) then
1264	>	IBError(ibxeCannotUpdate, [nil]);
1265	>	if (State in [dsInsert]) and (not CanInsert) then
1266	>	IBError(ibxeCannotInsert, [nil]);
1267	>	end;
1268	>	else
1269	>	IBError(ibxeNotEditing, [])
1270	>	end;
1271	>	end;
1272	>
1273	>	procedure TIBCustomDataSet.ClearBlobCache;
1274	>	var
1275	>	i: Integer;
1276	>	begin
1277	>	for i := 0 to FBlobStreamList.Count - 1 do
1278	>	begin
1279	>	TIBBlobStream(FBlobStreamList[i]).Free;
1280	>	FBlobStreamList[i] := nil;
1281	>	end;
1282	>	FBlobStreamList.Pack;
1283	>	end;
1284	>
1285	>	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1286	>	begin
1287	>	Move(Source^, Dest^, FRecordBufferSize);
1288	>	end;
1289	>
1290	>	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1291	>	begin
1292	>	if Active then
1293	>	Active := False;
1294	>	FInternalPrepared := False;
1295	>	if Assigned(FBeforeDatabaseDisconnect) then
1296	>	FBeforeDatabaseDisconnect(Sender);
1297	>	end;
1298	>
1299	>	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1300	>	begin
1301	>	if Assigned(FAfterDatabaseDisconnect) then
1302	>	FAfterDatabaseDisconnect(Sender);
1303	>	end;
1304	>
1305	>	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1306	>	begin
1307	>	if Assigned(FDatabaseFree) then
1308	>	FDatabaseFree(Sender);
1309	>	end;
1310	>
1311	>	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject);
1312	>	begin
1313	>	if Active then
1314	>	Active := False;
1315	>	if FQSelect <> nil then
1316	>	FQSelect.FreeHandle;
1317	>	if FQDelete <> nil then
1318	>	FQDelete.FreeHandle;
1319	>	if FQInsert <> nil then
1320	>	FQInsert.FreeHandle;
1321	>	if FQModify <> nil then
1322	>	FQModify.FreeHandle;
1323	>	if FQRefresh <> nil then
1324	>	FQRefresh.FreeHandle;
1325	>	if Assigned(FBeforeTransactionEnd) then
1326	>	FBeforeTransactionEnd(Sender);
1327	>	end;
1328	>
1329	>	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1330	>	begin
1331	>	if Assigned(FAfterTransactionEnd) then
1332	>	FAfterTransactionEnd(Sender);
1333	>	end;
1334	>
1335	>	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1336	>	begin
1337	>	if Assigned(FTransactionFree) then
1338	>	FTransactionFree(Sender);
1339	>	end;
1340	>
1341	>	{ Read the record from FQSelect.Current into the record buffer
1342	>	Then write the buffer to in memory cache }
1343	>	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
1344	>	RecordNumber: Integer; Buffer: PChar);
1345	>	var
1346	>	p: PRecordData;
1347	>	pbd: PBlobDataArray;
1348	>	i, j: Integer;
1349	>	LocalData: Pointer;
1350	>	LocalDate, LocalDouble: Double;
1351	>	LocalInt: Integer;
1352	>	LocalInt64: Int64;
1353	>	LocalCurrency: Currency;
1354	>	FieldsLoaded: Integer;
1355	>	temp: TIBXSQLVAR;
1356	>	begin
1357	>	p := PRecordData(Buffer);
1358	>	{ Make sure blob cache is empty }
1359	>	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
1360	>	if RecordNumber > -1 then
1361	>	for i := 0 to BlobFieldCount - 1 do
1362	>	pbd^[i] := nil;
1363	>	{ Get record information }
1364	>	p^.rdBookmarkFlag := bfCurrent;
1365	>	p^.rdFieldCount := Qry.Current.Count;
1366	>	p^.rdRecordNumber := RecordNumber;
1367	>	p^.rdUpdateStatus := usUnmodified;
1368	>	p^.rdCachedUpdateStatus := cusUnmodified;
1369	>	p^.rdSavedOffset := $FFFFFFFF;
1370	>
1371	>	{ Load up the fields }
1372	>	FieldsLoaded := FQSelect.Current.Count;
1373	>	j := 1;
1374	>	for i := 0 to Qry.Current.Count - 1 do
1375	>	begin
1376	>	if (Qry = FQSelect) then
1377	>	j := i + 1
1378	>	else begin
1379	>	if FieldsLoaded = 0 then
1380	>	break;
1381	>	j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1;
1382	>	if j < 1 then
1383	>	continue
1384	>	else
1385	>	Dec(FieldsLoaded);
1386	>	end;
1387	>	with FQSelect.Current[j - 1].Data^ do
1388	>	if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
1389	>	begin
1390	>	if sqllen <= 8 then
1391	>	p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^;
1392	>	continue;
1393	>	end;
1394	>	if j > 0 then with p^ do
1395	>	begin
1396	>	rdFields[j].fdDataType :=
1397	>	Qry.Current[i].Data^.sqltype and (not 1);
1398	>	rdFields[j].fdDataScale :=
1399	>	Qry.Current[i].Data^.sqlscale;
1400	>	rdFields[j].fdNullable :=
1401	>	(Qry.Current[i].Data^.sqltype and 1 = 1);
1402	>	rdFields[j].fdIsNull :=
1403	>	(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1));
1404	>	LocalData := Qry.Current[i].Data^.sqldata;
1405	>	case rdFields[j].fdDataType of
1406	>	SQL_TIMESTAMP:
1407	>	begin
1408	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1409	>	if RecordNumber >= 0 then
1410	>	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime));
1411	>	LocalData := PChar(@LocalDate);
1412	>	end;
1413	>	SQL_TYPE_DATE:
1414	>	begin
1415	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1416	>	if RecordNumber >= 0 then
1417	>	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date;
1418	>	LocalData := PChar(@LocalInt);
1419	>	end;
1420	>	SQL_TYPE_TIME:
1421	>	begin
1422	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1423	>	if RecordNumber >= 0 then
1424	>	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time;
1425	>	LocalData := PChar(@LocalInt);
1426	>	end;
1427	>	SQL_SHORT, SQL_LONG:
1428	>	begin
1429	>	if (rdFields[j].fdDataScale = 0) then
1430	>	begin
1431	>	rdFields[j].fdDataSize := SizeOf(Integer);
1432	>	if RecordNumber >= 0 then
1433	>	LocalInt := Qry.Current[i].AsLong;
1434	>	LocalData := PChar(@LocalInt);
1435	>	end
1436	>	else if (rdFields[j].fdDataScale >= (-4)) then
1437	>	begin
1438	>	rdFields[j].fdDataSize := SizeOf(Currency);
1439	>	if RecordNumber >= 0 then
1440	>	LocalCurrency := Qry.Current[i].AsCurrency;
1441	>	LocalData := PChar(@LocalCurrency);
1442	>	end
1443	>	else begin
1444	>	rdFields[j].fdDataSize := SizeOf(Double);
1445	>	if RecordNumber >= 0 then
1446	>	LocalDouble := Qry.Current[i].AsDouble;
1447	>	LocalData := PChar(@LocalDouble);
1448	>	end;
1449	>	end;
1450	>	SQL_INT64:
1451	>	begin
1452	>	if (rdFields[j].fdDataScale = 0) then
1453	>	begin
1454	>	rdFields[j].fdDataSize := SizeOf(Int64);
1455	>	if RecordNumber >= 0 then
1456	>	LocalInt64 := Qry.Current[i].AsInt64;
1457	>	LocalData := PChar(@LocalInt64);
1458	>	end
1459	>	else if (rdFields[j].fdDataScale >= (-4)) then
1460	>	begin
1461	>	rdFields[j].fdDataSize := SizeOf(Currency);
1462	>	if RecordNumber >= 0 then
1463	>	LocalCurrency := Qry.Current[i].AsCurrency;
1464	>	LocalData := PChar(@LocalCurrency);
1465	>	end
1466	>	else begin
1467	>	rdFields[j].fdDataSize := SizeOf(Double);
1468	>	if RecordNumber >= 0 then
1469	>	LocalDouble := Qry.Current[i].AsDouble;
1470	>	LocalData := PChar(@LocalDouble);
1471	>	end
1472	>	end;
1473	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
1474	>	begin
1475	>	rdFields[j].fdDataSize := SizeOf(Double);
1476	>	if RecordNumber >= 0 then
1477	>	LocalDouble := Qry.Current[i].AsDouble;
1478	>	LocalData := PChar(@LocalDouble);
1479	>	end;
1480	>	SQL_VARYING:
1481	>	begin
1482	>	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1483	>	rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2);
1484	>	if RecordNumber >= 0 then
1485	>	begin
1486	>	if (rdFields[j].fdDataLength = 0) then
1487	>	LocalData := nil
1488	>	else
1489	>	begin
1490	>	temp :=  Qry.Current[i];
1491	>	LocalData := @temp.Data^.sqldata[2];
1492	>	(*              LocalData := @Qry.Current[i].Data^.sqldata[2];*)
1493	>	end;
1494	>	end;
1495	>	end;
1496	>	else { SQL_TEXT, SQL_BLOB, SQL_ARRAY, SQL_QUAD }
1497	>	begin
1498	>	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1499	>	if (rdFields[j].fdDataType = SQL_TEXT) then
1500	>	rdFields[j].fdDataLength := rdFields[j].fdDataSize;
1501	>	end;
1502	>	end;
1503	>	if RecordNumber < 0 then
1504	>	begin
1505	>	rdFields[j].fdIsNull := True;
1506	>	rdFields[j].fdDataOfs := FRecordSize;
1507	>	Inc(FRecordSize, rdFields[j].fdDataSize);
1508	>	end
1509	>	else begin
1510	>	if rdFields[j].fdDataType = SQL_VARYING then
1511	>	begin
1512	>	if LocalData <> nil then
1513	>	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength)
1514	>	end
1515	>	else
1516	>	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize)
1517	>	end;
1518	>	end;
1519	>	end;
1520	>	WriteRecordCache(RecordNumber, PChar(p));
1521	>	end;
1522	>
1523	>	function TIBCustomDataSet.GetActiveBuf: PChar;
1524	>	begin
1525	>	case State of
1526	>	dsBrowse:
1527	>	if IsEmpty then
1528	>	result := nil
1529	>	else
1530	>	result := ActiveBuffer;
1531	>	dsEdit, dsInsert:
1532	>	result := ActiveBuffer;
1533	>	dsCalcFields:
1534	>	result := CalcBuffer;
1535	>	dsFilter:
1536	>	result := FFilterBuffer;
1537	>	dsNewValue:
1538	>	result := ActiveBuffer;
1539	>	dsOldValue:
1540	>	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
1541	>	PRecordData(FOldBuffer)^.rdRecordNumber) then
1542	>	result := FOldBuffer
1543	>	else
1544	>	result := ActiveBuffer;
1545	>	else if not FOpen then
1546	>	result := nil
1547	>	else
1548	>	result := ActiveBuffer;
1549	>	end;
1550	>	end;
1551	>
1552	>	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
1553	>	begin
1554	>	if Active then
1555	>	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
1556	>	else
1557	>	result := cusUnmodified;
1558	>	end;
1559	>
1560	>	function TIBCustomDataSet.GetDatabase: TIBDatabase;
1561	>	begin
1562	>	result := FBase.Database;
1563	>	end;
1564	>
1565	>	function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE;
1566	>	begin
1567	>	result := FBase.DBHandle;
1568	>	end;
1569	>
1570	>	function TIBCustomDataSet.GetDeleteSQL: TStrings;
1571	>	begin
1572	>	result := FQDelete.SQL;
1573	>	end;
1574	>
1575	>	function TIBCustomDataSet.GetInsertSQL: TStrings;
1576	>	begin
1577	>	result := FQInsert.SQL;
1578	>	end;
1579	>
1580	>	function TIBCustomDataSet.GetSQLParams: TIBXSQLDA;
1581	>	begin
1582	>	if not FInternalPrepared then
1583	>	InternalPrepare;
1584	>	result := FQSelect.Params;
1585	>	end;
1586	>
1587	>	function TIBCustomDataSet.GetRefreshSQL: TStrings;
1588	>	begin
1589	>	result := FQRefresh.SQL;
1590	>	end;
1591	>
1592	>	function TIBCustomDataSet.GetSelectSQL: TStrings;
1593	>	begin
1594	>	result := FQSelect.SQL;
1595	>	end;
1596	>
1597	>	function TIBCustomDataSet.GetStatementType: TIBSQLTypes;
1598	>	begin
1599	>	result := FQSelect.SQLType;
1600	>	end;
1601	>
1602	>	function TIBCustomDataSet.GetModifySQL: TStrings;
1603	>	begin
1604	>	result := FQModify.SQL;
1605	>	end;
1606	>
1607	>	function TIBCustomDataSet.GetTransaction: TIBTransaction;
1608	>	begin
1609	>	result := FBase.Transaction;
1610	>	end;
1611	>
1612	>	function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE;
1613	>	begin
1614	>	result := FBase.TRHandle;
1615	>	end;
1616	>
1617	>	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
1618	>	begin
1619	>	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1620	>	FUpdateObject.Apply(ukDelete,Buff)
1621	>	else
1622	>	begin
1623	>	SetInternalSQLParams(FQDelete, Buff);
1624	>	FQDelete.ExecQuery;
1625	>	end;
1626	>	with PRecordData(Buff)^ do
1627	>	begin
1628	>	rdUpdateStatus := usDeleted;
1629	>	rdCachedUpdateStatus := cusUnmodified;
1630	>	end;
1631	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1632	>	end;
1633	>
1634	>	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
1635	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1636	>	var
1637	>	keyFieldList: TList;
1638	>	{$IF FPC_FULLVERSION >= 20700 }
1639	>	CurBookmark: TBookmark;
1640	>	{$ELSE}
1641	>	CurBookmark: string;
1642	>	{$ENDIF}
1643	>	fieldValue: Variant;
1644	>	lookupValues: array of variant;
1645	>	i, fieldCount: Integer;
1646	>	fieldValueAsString: string;
1647	>	lookupValueAsString: string;
1648	>	begin
1649	>	keyFieldList := TList.Create;
1650	>	try
1651	>	GetFieldList(keyFieldList, KeyFields);
1652	>	fieldCount := keyFieldList.Count;
1653	>	CurBookmark := Bookmark;
1654	>	result := false;
1655	>	SetLength(lookupValues, fieldCount);
1656	>	if not EOF then
1657	>	begin
1658	>	for i := 0 to fieldCount - 1 do  {expand key values into lookupValues array}
1659	>	begin
1660	>	if VarIsArray(KeyValues) then
1661	>	lookupValues[i] := KeyValues[i]
1662	>	else
1663	>	if i > 0 then
1664	>	lookupValues[i] := NULL
1665	>	else
1666	>	lookupValues[0] := KeyValues;
1667	>
1668	>	{convert to upper case is case insensitive search}
1669	>	if (TField(keyFieldList[i]).DataType = ftString) and
1670	>	not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
1671	>	lookupValues[i] := UpperCase(lookupValues[i]);
1672	>	end;
1673	>	end;
1674	>	while not result and not EOF do   {search for a matching record}
1675	>	begin
1676	>	i := 0;
1677	>	result := true;
1678	>	while result and (i < fieldCount) do
1679	>	{see if all of the key fields matches}
1680	>	begin
1681	>	fieldValue := TField(keyFieldList[i]).Value;
1682	>	result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
1683	>	if result and not VarIsNull(fieldValue) then
1684	>	begin
1685	>	try
1686	>	if TField(keyFieldList[i]).DataType = ftString then
1687	>	begin
1688	>	{strings need special handling because of the locate options that
1689	>	apply to them}
1690	>	fieldValueAsString := TField(keyFieldList[i]).AsString;
1691	>	lookupValueAsString := lookupValues[i];
1692	>	if (loCaseInsensitive in Options) then
1693	>	fieldValueAsString := UpperCase(fieldValueAsString);
1694	>
1695	>	if (loPartialKey in Options) then
1696	>	result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
1697	>	else
1698	>	result := result and (fieldValueAsString = lookupValueAsString);
1699	>	end
1700	>	else
1701	>	result := result and (lookupValues[i] =
1702	>	VarAsType(fieldValue, VarType(lookupValues[i])));
1703	>	except on EVariantError do
1704	>	result := False;
1705	>	end;
1706	>	end;
1707	>	Inc(i);
1708	>	end;
1709	>	if not result then
1710	>	Next;
1711	>	end;
1712	>	if not result then
1713	>	Bookmark := CurBookmark
1714	>	else
1715	>	CursorPosChanged;
1716	>	finally
1717	>	keyFieldList.Free;
1718	>	SetLength(lookupValues,0)
1719	>	end;
1720	>	end;
1721	>
1722	>	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
1723	>	var
1724	>	i, j, k: Integer;
1725	>	pbd: PBlobDataArray;
1726	>	begin
1727	>	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
1728	>	j := 0;
1729	>	for i := 0 to FieldCount - 1 do
1730	>	if Fields[i].IsBlob then
1731	>	begin
1732	>	k := FMappedFieldPosition[Fields[i].FieldNo -1];
1733	>	if pbd^[j] <> nil then
1734	>	begin
1735	>	pbd^[j].Finalize;
1736	>	PISC_QUAD(
1737	>	PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ :=
1738	>	pbd^[j].BlobID;
1739	>	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
1740	>	end;
1741	>	Inc(j);
1742	>	end;
1743	>	if Assigned(FUpdateObject) then
1744	>	begin
1745	>	if (Qry = FQDelete) then
1746	>	FUpdateObject.Apply(ukDelete,Buff)
1747	>	else if (Qry = FQInsert) then
1748	>	FUpdateObject.Apply(ukInsert,Buff)
1749	>	else
1750	>	FUpdateObject.Apply(ukModify,Buff);
1751	>	end
1752	>	else begin
1753	>	SetInternalSQLParams(Qry, Buff);
1754	>	Qry.ExecQuery;
1755	>	end;
1756	>	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
1757	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
1758	>	SetModified(False);
1759	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1760	>	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
1761	>	InternalRefreshRow;
1762	>	end;
1763	>
1764	>	procedure TIBCustomDataSet.InternalRefreshRow;
1765	>	var
1766	>	Buff: PChar;
1767	>	SetCursor: Boolean;
1768	>	ofs: DWORD;
1769	>	Qry: TIBSQL;
1770	>	begin
1771	>	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1772	>	if SetCursor then
1773	>	Screen.Cursor := crHourGlass;
1774	>	try
1775	>	Buff := GetActiveBuf;
1776	>	if CanRefresh then
1777	>	begin
1778	>	if Buff <> nil then
1779	>	begin
1780	>	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
1781	>	begin
1782	>	Qry := TIBSQL.Create(self);
1783	>	Qry.Database := Database;
1784	>	Qry.Transaction := Transaction;
1785	>	Qry.GoToFirstRecordOnExecute := False;
1786	>	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
1787	>	end
1788	>	else
1789	>	Qry := FQRefresh;
1790	>	SetInternalSQLParams(Qry, Buff);
1791	>	Qry.ExecQuery;
1792	>	try
1793	>	if (Qry.SQLType = SQLExecProcedure) or
1794	>	(Qry.Next <> nil) then
1795	>	begin
1796	>	ofs := PRecordData(Buff)^.rdSavedOffset;
1797	>	FetchCurrentRecordToBuffer(Qry,
1798	>	PRecordData(Buff)^.rdRecordNumber,
1799	>	Buff);
1800	>	if FCachedUpdates and (ofs <> $FFFFFFFF) then
1801	>	begin
1802	>	PRecordData(Buff)^.rdSavedOffset := ofs;
1803	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1804	>	SaveOldBuffer(Buff);
1805	>	end;
1806	>	end;
1807	>	finally
1808	>	Qry.Close;
1809	>	end;
1810	>	if Qry <> FQRefresh then
1811	>	Qry.Free;
1812	>	end
1813	>	end
1814	>	else
1815	>	IBError(ibxeCannotRefresh, [nil]);
1816	>	finally
1817	>	if SetCursor and (Screen.Cursor = crHourGlass) then
1818	>	Screen.Cursor := crDefault;
1819	>	end;
1820	>	end;
1821	>
1822	>	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
1823	>	var
1824	>	NewBuffer, OldBuffer: PRecordData;
1825	>
1826	>	begin
1827	>	NewBuffer := nil;
1828	>	OldBuffer := nil;
1829	>	NewBuffer := PRecordData(AllocRecordBuffer);
1830	>	OldBuffer := PRecordData(AllocRecordBuffer);
1831	>	try
1832	>	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
1833	>	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
1834	>	case NewBuffer^.rdCachedUpdateStatus of
1835	>	cusInserted:
1836	>	begin
1837	>	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
1838	>	Inc(FDeletedRecords);
1839	>	end;
1840	>	cusModified,
1841	>	cusDeleted:
1842	>	begin
1843	>	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
1844	>	Dec(FDeletedRecords);
1845	>	CopyRecordBuffer(OldBuffer, NewBuffer);
1846	>	end;
1847	>	end;
1848	>
1849	>	if State in dsEditModes then
1850	>	Cancel;
1851	>
1852	>	WriteRecordCache(RecordNumber, PChar(NewBuffer));
1853	>
1854	>	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
1855	>	ReSync([]);
1856	>	finally
1857	>	FreeRecordBuffer(PChar(NewBuffer));
1858	>	FreeRecordBuffer(PChar(OldBuffer));
1859	>	end;
1860	>	end;
1861	>
1862	>	{ A visible record is one that is not truly deleted,
1863	>	and it is also listed in the FUpdateRecordTypes set }
1864	>
1865	>	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
1866	>	begin
1867	>	result := True;
1868	>	if not (State = dsOldValue) then
1869	>	result :=
1870	>	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
1871	>	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
1872	>	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
1873	>	end;
1874	>
1875	>
1876	>	function TIBCustomDataSet.LocateNext(const KeyFields: string;
1877	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1878	>	begin
1879	>	DisableControls;
1880	>	try
1881	>	result := InternalLocate(KeyFields, KeyValues, Options);
1882	>	finally
1883	>	EnableControls;
1884	>	end;
1885	>	end;
1886	>
1887	>	procedure TIBCustomDataSet.InternalPrepare;
1888	>	var
1889	>	SetCursor: Boolean;
1890	>	DidActivate: Boolean;
1891	>	begin
1892	>	if FInternalPrepared then
1893	>	Exit;
1894	>	DidActivate := False;
1895	>	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1896	>	if SetCursor then
1897	>	Screen.Cursor := crHourGlass;
1898	>	try
1899	>	ActivateConnection;
1900	>	DidActivate := ActivateTransaction;
1901	>	FBase.CheckDatabase;
1902	>	FBase.CheckTransaction;
1903	>	if FQSelect.SQL.Text <> '' then
1904	>	begin
1905	>	if not FQSelect.Prepared then
1906	>	begin
1907	>	FQSelect.GenerateParamNames := FGenerateParamNames;
1908	>	FQSelect.ParamCheck := ParamCheck;
1909	>	FQSelect.Prepare;
1910	>	end;
1911	>	FQDelete.GenerateParamNames := FGenerateParamNames;
1912	>	if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
1913	>	FQDelete.Prepare;
1914	>	FQInsert.GenerateParamNames := FGenerateParamNames;
1915	>	if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
1916	>	FQInsert.Prepare;
1917	>	FQRefresh.GenerateParamNames := FGenerateParamNames;
1918	>	if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
1919	>	FQRefresh.Prepare;
1920	>	FQModify.GenerateParamNames := FGenerateParamNames;
1921	>	if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
1922	>	FQModify.Prepare;
1923	>	FInternalPrepared := True;
1924	>	InternalInitFieldDefs;
1925	>	end else
1926	>	IBError(ibxeEmptyQuery, [nil]);
1927	>	finally
1928	>	if DidActivate then
1929	>	DeactivateTransaction;
1930	>	if SetCursor and (Screen.Cursor = crHourGlass) then
1931	>	Screen.Cursor := crDefault;
1932	>	end;
1933	>	end;
1934	>
1935	>	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
1936	>	begin
1937	>	SetModified(Value);
1938	>	end;
1939	>
1940	>	procedure TIBCustomDataSet.RevertRecord;
1941	>	var
1942	>	Buff: PRecordData;
1943	>	begin
1944	>	if FCachedUpdates and FUpdatesPending then
1945	>	begin
1946	>	Buff := PRecordData(GetActiveBuf);
1947	>	InternalRevertRecord(Buff^.rdRecordNumber);
1948	>	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
1949	>	DataEvent(deRecordChange, 0);
1950	>	end;
1951	>	end;
1952	>
1953	>	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
1954	>	var
1955	>	OldBuffer: Pointer;
1956	>	procedure CopyOldBuffer;
1957	>	begin
1958	>	CopyRecordBuffer(Buffer, OldBuffer);
1959	>	if BlobFieldCount > 0 then
1960	>	FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream),
1961	>	0);
1962	>	end;
1963	>
1964	>	begin
1965	>	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
1966	>	begin
1967	>	OldBuffer := AllocRecordBuffer;
1968	>	try
1969	>	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
1970	>	begin
1971	>	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
1972	>	FILE_END);
1973	>	CopyOldBuffer;
1974	>	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
1975	>	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
1976	>	FILE_BEGIN, Buffer);
1977	>	end
1978	>	else begin
1979	>	CopyOldBuffer;
1980	>	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
1981	>	OldBuffer);
1982	>	end;
1983	>	finally
1984	>	FreeRecordBuffer(PChar(OldBuffer));
1985	>	end;
1986	>	end;
1987	>	end;
1988	>
1989	>	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
1990	>	begin
1991	>	if (Value <= 0) then
1992	>	FBufferChunks := BufferCacheSize
1993	>	else
1994	>	FBufferChunks := Value;
1995	>	end;
1996	>
1997	>	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
1998	>	begin
1999	>	if (FBase.Database <> Value) then
2000	>	begin
2001	>	CheckDatasetClosed;
2002	>	FBase.Database := Value;
2003	>	FQDelete.Database := Value;
2004	>	FQInsert.Database := Value;
2005	>	FQRefresh.Database := Value;
2006	>	FQSelect.Database := Value;
2007	>	FQModify.Database := Value;
2008	>	end;
2009	>	end;
2010	>
2011	>	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
2012	>	begin
2013	>	if FQDelete.SQL.Text <> Value.Text then
2014	>	begin
2015	>	Disconnect;
2016	>	FQDelete.SQL.Assign(Value);
2017	>	end;
2018	>	end;
2019	>
2020	>	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
2021	>	begin
2022	>	if FQInsert.SQL.Text <> Value.Text then
2023	>	begin
2024	>	Disconnect;
2025	>	FQInsert.SQL.Assign(Value);
2026	>	end;
2027	>	end;
2028	>
2029	>	procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
2030	>	var
2031	>	i, j: Integer;
2032	>	cr, data: PChar;
2033	>	fn, st: string;
2034	>	OldBuffer: Pointer;
2035	>	ts: TTimeStamp;
2036	>	begin
2037	>	if (Buffer = nil) then
2038	>	IBError(ibxeBufferNotSet, [nil]);
2039	>	if (not FInternalPrepared) then
2040	>	InternalPrepare;
2041	>	OldBuffer := nil;
2042	>	try
2043	>	for i := 0 to Qry.Params.Count - 1 do
2044	>	begin
2045	>	fn := Qry.Params[i].Name;
2046	>	if (Pos('OLD_', fn) = 1) then {mbcs ok}
2047	>	begin
2048	>	fn := Copy(fn, 5, Length(fn));
2049	>	if not Assigned(OldBuffer) then
2050	>	begin
2051	>	OldBuffer := AllocRecordBuffer;
2052	>	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
2053	>	end;
2054	>	cr := OldBuffer;
2055	>	end
2056	>	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
2057	>	begin
2058	>	fn := Copy(fn, 5, Length(fn));
2059	>	cr := Buffer;
2060	>	end
2061	>	else
2062	>	cr := Buffer;
2063	>	j := FQSelect.FieldIndex[fn] + 1;
2064	>	if (j > 0) then
2065	>	with PRecordData(cr)^ do
2066	>	begin
2067	>	if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize}
2068	>	begin
2069	>	PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey;
2070	>	continue;
2071	>	end;
2072	>	if rdFields[j].fdIsNull then
2073	>	Qry.Params[i].IsNull := True
2074	>	else begin
2075	>	Qry.Params[i].IsNull := False;
2076	>	data := cr + rdFields[j].fdDataOfs;
2077	>	case rdFields[j].fdDataType of
2078	>	SQL_TEXT, SQL_VARYING:
2079	>	begin
2080	>	SetString(st, data, rdFields[j].fdDataLength);
2081	>	Qry.Params[i].AsString := st;
2082	>	end;
2083	>	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
2084	>	Qry.Params[i].AsDouble := PDouble(data)^;
2085	>	SQL_SHORT, SQL_LONG:
2086	>	begin
2087	>	if rdFields[j].fdDataScale = 0 then
2088	>	Qry.Params[i].AsLong := PLong(data)^
2089	>	else if rdFields[j].fdDataScale >= (-4) then
2090	>	Qry.Params[i].AsCurrency := PCurrency(data)^
2091	>	else
2092	>	Qry.Params[i].AsDouble := PDouble(data)^;
2093	>	end;
2094	>	SQL_INT64:
2095	>	begin
2096	>	if rdFields[j].fdDataScale = 0 then
2097	>	Qry.Params[i].AsInt64 := PInt64(data)^
2098	>	else if rdFields[j].fdDataScale >= (-4) then
2099	>	Qry.Params[i].AsCurrency := PCurrency(data)^
2100	>	else
2101	>	Qry.Params[i].AsDouble := PDouble(data)^;
2102	>	end;
2103	>	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
2104	>	Qry.Params[i].AsQuad := PISC_QUAD(data)^;
2105	>	SQL_TYPE_DATE:
2106	>	begin
2107	>	ts.Date := PInt(data)^;
2108	>	ts.Time := 0;
2109	>	Qry.Params[i].AsDate :=
2110	>	TimeStampToDateTime(ts);
2111	>	end;
2112	>	SQL_TYPE_TIME:
2113	>	begin
2114	>	ts.Date := 0;
2115	>	ts.Time := PInt(data)^;
2116	>	Qry.Params[i].AsTime :=
2117	>	TimeStampToDateTime(ts);
2118	>	end;
2119	>	SQL_TIMESTAMP:
2120	>	Qry.Params[i].AsDateTime :=
2121	>	TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^)));
2122	>	end;
2123	>	end;
2124	>	end;
2125	>	end;
2126	>	finally
2127	>	if (OldBuffer <> nil) then
2128	>	FreeRecordBuffer(PChar(OldBuffer));
2129	>	end;
2130	>	end;
2131	>
2132	>	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2133	>	begin
2134	>	if FQRefresh.SQL.Text <> Value.Text then
2135	>	begin
2136	>	Disconnect;
2137	>	FQRefresh.SQL.Assign(Value);
2138	>	end;
2139	>	end;
2140	>
2141	>	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2142	>	begin
2143	>	if FQSelect.SQL.Text <> Value.Text then
2144	>	begin
2145	>	Disconnect;
2146	>	FQSelect.SQL.Assign(Value);
2147	>	end;
2148	>	end;
2149	>
2150	>	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2151	>	begin
2152	>	if FQModify.SQL.Text <> Value.Text then
2153	>	begin
2154	>	Disconnect;
2155	>	FQModify.SQL.Assign(Value);
2156	>	end;
2157	>	end;
2158	>
2159	>	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2160	>	begin
2161	>	if (FBase.Transaction <> Value) then
2162	>	begin
2163	>	CheckDatasetClosed;
2164	>	FBase.Transaction := Value;
2165	>	FQDelete.Transaction := Value;
2166	>	FQInsert.Transaction := Value;
2167	>	FQRefresh.Transaction := Value;
2168	>	FQSelect.Transaction := Value;
2169	>	FQModify.Transaction := Value;
2170	>	end;
2171	>	end;
2172	>
2173	>	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2174	>	begin
2175	>	CheckDatasetClosed;
2176	>	FUniDirectional := Value;
2177	>	end;
2178	>
2179	>	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2180	>	begin
2181	>	FUpdateRecordTypes := Value;
2182	>	if Active then
2183	>	First;
2184	>	end;
2185	>
2186	>	procedure TIBCustomDataSet.RefreshParams;
2187	>	var
2188	>	DataSet: TDataSet;
2189	>	begin
2190	>	DisableControls;
2191	>	try
2192	>	if FDataLink.DataSource <> nil then
2193	>	begin
2194	>	DataSet := FDataLink.DataSource.DataSet;
2195	>	if DataSet <> nil then
2196	>	if DataSet.Active and (DataSet.State <> dsSetKey) then
2197	>	begin
2198	>	Close;
2199	>	Open;
2200	>	end;
2201	>	end;
2202	>	finally
2203	>	EnableControls;
2204	>	end;
2205	>	end;
2206	>
2207	>
2208	>	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2209	>	begin
2210	>	if FOpen then
2211	>	InternalClose;
2212	>	if FInternalPrepared then
2213	>	InternalUnPrepare;
2214	>	FieldDefs.Clear;
2215	>	FieldDefs.Updated := false
2216	>	end;
2217	>
2218	>	{ I can "undelete" uninserted records (make them "inserted" again).
2219	>	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2220	>	procedure TIBCustomDataSet.Undelete;
2221	>	var
2222	>	Buff: PRecordData;
2223	>	begin
2224	>	CheckActive;
2225	>	Buff := PRecordData(GetActiveBuf);
2226	>	with Buff^ do
2227	>	begin
2228	>	if rdCachedUpdateStatus = cusUninserted then
2229	>	begin
2230	>	rdCachedUpdateStatus := cusInserted;
2231	>	Dec(FDeletedRecords);
2232	>	end
2233	>	else if (rdUpdateStatus = usDeleted) and
2234	>	(rdCachedUpdateStatus = cusDeleted) then
2235	>	begin
2236	>	rdCachedUpdateStatus := cusUnmodified;
2237	>	rdUpdateStatus := usUnmodified;
2238	>	Dec(FDeletedRecords);
2239	>	end;
2240	>	WriteRecordCache(rdRecordNumber, PChar(Buff));
2241	>	end;
2242	>	end;
2243	>
2244	>	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2245	>	begin
2246	>	if Active then
2247	>	if GetActiveBuf <> nil then
2248	>	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2249	>	else
2250	>	result := usUnmodified
2251	>	else
2252	>	result := usUnmodified;
2253	>	end;
2254	>
2255	>	function TIBCustomDataSet.IsSequenced: Boolean;
2256	>	begin
2257	>	Result := Assigned( FQSelect ) and FQSelect.EOF;
2258	>	end;
2259	>
2260	>	function TIBCustomDataSet.ParamByName(ParamName: String): TIBXSQLVAR;
2261	>	begin
2262	>	ActivateConnection;
2263	>	ActivateTransaction;
2264	>	if not FInternalPrepared then
2265	>	InternalPrepare;
2266	>	Result := Params.ByName(ParamName);
2267	>	end;
2268	>
2269	>	{Beware: the parameter FCache is used as an identifier to determine which
2270	>	cache is being operated on and is not referenced in the computation.
2271	>	The result is an adjusted offset into the identified cache, either the
2272	>	Buffer Cache or the old Buffer Cache.}
2273	>
2274	>	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
2275	>	Origin: Integer): DWORD;
2276	>	var
2277	>	OldCacheSize: Integer;
2278	>	begin
2279	>	if (FCache = FBufferCache) then
2280	>	begin
2281	>	case Origin of
2282	>	FILE_BEGIN:    FBPos := Offset;
2283	>	FILE_CURRENT:  FBPos := FBPos + Offset;
2284	>	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
2285	>	end;
2286	>	OldCacheSize := FCacheSize;
2287	>	while (FBPos >= DWORD(FCacheSize)) do
2288	>	Inc(FCacheSize, FBufferChunkSize);
2289	>	if FCacheSize > OldCacheSize then
2290	>	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
2291	>	result := FBPos;
2292	>	end
2293	>	else begin
2294	>	case Origin of
2295	>	FILE_BEGIN:    FOBPos := Offset;
2296	>	FILE_CURRENT:  FOBPos := FOBPos + Offset;
2297	>	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
2298	>	end;
2299	>	OldCacheSize := FOldCacheSize;
2300	>	while (FBPos >= DWORD(FOldCacheSize)) do
2301	>	Inc(FOldCacheSize, FBufferChunkSize);
2302	>	if FOldCacheSize > OldCacheSize then
2303	>	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
2304	>	result := FOBPos;
2305	>	end;
2306	>	end;
2307	>
2308	>	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2309	>	Buffer: PChar);
2310	>	var
2311	>	pCache: PChar;
2312	>	AdjustedOffset: DWORD;
2313	>	bOld: Boolean;
2314	>	begin
2315	>	bOld := (FCache = FOldBufferCache);
2316	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2317	>	if not bOld then
2318	>	pCache := FBufferCache + AdjustedOffset
2319	>	else
2320	>	pCache := FOldBufferCache + AdjustedOffset;
2321	>	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
2322	>	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2323	>	end;
2324	>
2325	>	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
2326	>	ReadOldBuffer: Boolean);
2327	>	begin
2328	>	if FUniDirectional then
2329	>	RecordNumber := RecordNumber mod UniCache;
2330	>	if (ReadOldBuffer) then
2331	>	begin
2332	>	ReadRecordCache(RecordNumber, Buffer, False);
2333	>	if FCachedUpdates and
2334	>	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
2335	>	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2336	>	Buffer)
2337	>	else
2338	>	if ReadOldBuffer and
2339	>	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
2340	>	CopyRecordBuffer( FOldBuffer, Buffer )
2341	>	end
2342	>	else
2343	>	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2344	>	end;
2345	>
2346	>	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2347	>	Buffer: PChar);
2348	>	var
2349	>	pCache: PChar;
2350	>	AdjustedOffset: DWORD;
2351	>	bOld: Boolean;
2352	>	dwEnd: DWORD;
2353	>	begin
2354	>	bOld := (FCache = FOldBufferCache);
2355	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2356	>	if not bOld then
2357	>	pCache := FBufferCache + AdjustedOffset
2358	>	else
2359	>	pCache := FOldBufferCache + AdjustedOffset;
2360	>	Move(Buffer^, pCache^, FRecordBufferSize);
2361	>	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2362	>	if not bOld then
2363	>	begin
2364	>	if (dwEnd > FBEnd) then
2365	>	FBEnd := dwEnd;
2366	>	end
2367	>	else begin
2368	>	if (dwEnd > FOBEnd) then
2369	>	FOBEnd := dwEnd;
2370	>	end;
2371	>	end;
2372	>
2373	>	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
2374	>	begin
2375	>	if RecordNumber >= 0 then
2376	>	begin
2377	>	if FUniDirectional then
2378	>	RecordNumber := RecordNumber mod UniCache;
2379	>	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2380	>	end;
2381	>	end;
2382	>
2383	>	function TIBCustomDataSet.AllocRecordBuffer: PChar;
2384	>	begin
2385	>	result := nil;
2386	>	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
2387	>	Move(FModelBuffer^, result^, FRecordBufferSize);
2388	>	end;
2389	>
2390	>	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
2391	>	var
2392	>	pb: PBlobDataArray;
2393	>	fs: TIBBlobStream;
2394	>	Buff: PChar;
2395	>	bTr, bDB: Boolean;
2396	>	begin
2397	>	Buff := GetActiveBuf;
2398	>	if Buff = nil then
2399	>	begin
2400	>	fs := TIBBlobStream.Create;
2401	>	fs.Mode := bmReadWrite;
2402	>	FBlobStreamList.Add(Pointer(fs));
2403	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
2404	>	exit;
2405	>	end;
2406	>	pb := PBlobDataArray(Buff + FBlobCacheOffset);
2407	>	if pb^[Field.Offset] = nil then
2408	>	begin
2409	>	AdjustRecordOnInsert(Buff);
2410	>	pb^[Field.Offset] := TIBBlobStream.Create;
2411	>	fs := pb^[Field.Offset];
2412	>	FBlobStreamList.Add(Pointer(fs));
2413	>	fs.Mode := bmReadWrite;
2414	>	fs.Database := Database;
2415	>	fs.Transaction := Transaction;
2416	>	fs.BlobID :=
2417	>	PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
2418	>	if (CachedUpdates) then
2419	>	begin
2420	>	bTr := not Transaction.InTransaction;
2421	>	bDB := not Database.Connected;
2422	>	if bDB then
2423	>	Database.Open;
2424	>	if bTr then
2425	>	Transaction.StartTransaction;
2426	>	fs.Seek(0, soFromBeginning);
2427	>	if bTr then
2428	>	Transaction.Commit;
2429	>	if bDB then
2430	>	Database.Close;
2431	>	end;
2432	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
2433	>	end else
2434	>	fs := pb^[Field.Offset];
2435	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
2436	>	end;
2437	>
2438	>	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
2439	>	const
2440	>	CMPLess = -1;
2441	>	CMPEql  =  0;
2442	>	CMPGtr  =  1;
2443	>	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
2444	>	(CMPGtr, CMPEql));
2445	>	begin
2446	>	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
2447	>
2448	>	if Result = 2 then
2449	>	begin
2450	>	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
2451	>	Result := CMPLess
2452	>	else
2453	>	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
2454	>	Result := CMPGtr
2455	>	else
2456	>	Result := CMPEql;
2457	>	end;
2458	>	end;
2459	>
2460	>	procedure TIBCustomDataSet.DoBeforeDelete;
2461	>	var
2462	>	Buff: PRecordData;
2463	>	begin
2464	>	if not CanDelete then
2465	>	IBError(ibxeCannotDelete, [nil]);
2466	>	Buff := PRecordData(GetActiveBuf);
2467	>	if FCachedUpdates and
2468	>	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
2469	>	SaveOldBuffer(PChar(Buff));
2470	>	inherited DoBeforeDelete;
2471	>	end;
2472	>
2473	>	procedure TIBCustomDataSet.DoBeforeEdit;
2474	>	var
2475	>	Buff: PRecordData;
2476	>	begin
2477	>	Buff := PRecordData(GetActiveBuf);
2478	>	if not(CanEdit or (FQModify.SQL.Count <> 0) or
2479	>	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
2480	>	IBError(ibxeCannotUpdate, [nil]);
2481	>	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
2482	>	SaveOldBuffer(PChar(Buff));
2483	>	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
2484	>	inherited DoBeforeEdit;
2485	>	end;
2486	>
2487	>	procedure TIBCustomDataSet.DoBeforeInsert;
2488	>	begin
2489	>	if not CanInsert then
2490	>	IBError(ibxeCannotInsert, [nil]);
2491	>	inherited DoBeforeInsert;
2492	>	end;
2493	>
2494	>	procedure TIBCustomDataSet.DoAfterInsert;
2495	>	begin
2496	>	if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
2497	>	GeneratorField.Apply;
2498	>	inherited DoAfterInsert;
2499	>	end;
2500	>
2501	>	procedure TIBCustomDataSet.DoBeforePost;
2502	>	begin
2503	>	inherited DoBeforePost;
2504	>	if (State = dsInsert) and
2505	>	(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
2506	>	GeneratorField.Apply
2507	>	end;
2508	>
2509	>	procedure TIBCustomDataSet.FetchAll;
2510	>	var
2511	>	SetCursor: Boolean;
2512	>	{$IF FPC_FULLVERSION >= 20700 }
2513	>	CurBookmark: TBookmark;
2514	>	{$ELSE}
2515	>	CurBookmark: string;
2516	>	{$ENDIF}
2517	>	begin
2518	>	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2519	>	if SetCursor then
2520	>	Screen.Cursor := crHourGlass;
2521	>	try
2522	>	if FQSelect.EOF or not FQSelect.Open then
2523	>	exit;
2524	>	DisableControls;
2525	>	try
2526	>	CurBookmark := Bookmark;
2527	>	Last;
2528	>	Bookmark := CurBookmark;
2529	>	finally
2530	>	EnableControls;
2531	>	end;
2532	>	finally
2533	>	if SetCursor and (Screen.Cursor = crHourGlass) then
2534	>	Screen.Cursor := crDefault;
2535	>	end;
2536	>	end;
2537	>
2538	>	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
2539	>	begin
2540	>	FreeMem(Buffer);
2541	>	Buffer := nil;
2542	>	end;
2543	>
2544	>	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
2545	>	begin
2546	>	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
2547	>	end;
2548	>
2549	>	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
2550	>	begin
2551	>	result := PRecordData(Buffer)^.rdBookmarkFlag;
2552	>	end;
2553	>
2554	>	function TIBCustomDataSet.GetCanModify: Boolean;
2555	>	begin
2556	>	result := (FQInsert.SQL.Text <> '') or
2557	>	(FQModify.SQL.Text <> '') or
2558	>	(FQDelete.SQL.Text <> '') or
2559	>	(Assigned(FUpdateObject));
2560	>	end;
2561	>
2562	>	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
2563	>	begin
2564	>	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
2565	>	begin
2566	>	UpdateCursorPos;
2567	>	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
2568	>	result := True;
2569	>	end
2570	>	else
2571	>	result := False;
2572	>	end;
2573	>
2574	>	function TIBCustomDataSet.GetDataSource: TDataSource;
2575	>	begin
2576	>	if FDataLink = nil then
2577	>	result := nil
2578	>	else
2579	>	result := FDataLink.DataSource;
2580	>	end;
2581	>
2582	>	function TIBCustomDataSet.GetDBAliasName(FieldNo: integer): string;
2583	>	begin
2584	>	Result := FAliasNameMap[FieldNo-1]
2585	>	end;
2586	>
2587	>	function TIBCustomDataSet.GetFieldDefFromAlias(aliasName: string): TFieldDef;
2588	>	var
2589	>	i: integer;
2590	>	begin
2591	>	Result := nil;
2592	>	for i := 0 to Length(FAliasNameMap) - 1 do
2593	>	if FAliasNameMap[i] = aliasName then
2594	>	begin
2595	>	Result := FieldDefs[i+1];
2596	>	Exit
2597	>	end;
2598	>	end;
2599	>
2600	>	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
2601	>	begin
2602	>	Result := DefaultFieldClasses[FieldType];
2603	>	end;
2604	>
2605	>	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
2606	>	begin
2607	>	result := GetFieldData(FieldByNumber(FieldNo), buffer);
2608	>	end;
2609	>
2610	>	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
2611	>	var
2612	>	Buff, Data: PChar;
2613	>	CurrentRecord: PRecordData;
2614	>	begin
2615	>	result := False;
2616	>	Buff := GetActiveBuf;
2617	>	if (Buff = nil) or
2618	>	(not IsVisible(Buff)) or not assigned(Field.DataSet) then
2619	>	exit;
2620	>	{ The intention here is to stuff the buffer with the data for the
2621	>	referenced field for the current record }
2622	>	CurrentRecord := PRecordData(Buff);
2623	>	if (Field.FieldNo < 0) then
2624	>	begin
2625	>	Inc(Buff, FRecordSize + Field.Offset);
2626	>	result := Boolean(Buff[0]);
2627	>	if result and (Buffer <> nil) then
2628	>	Move(Buff[1], Buffer^, Field.DataSize);
2629	>	end
2630	>	else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
2631	>	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
2632	>	begin
2633	>	result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull;
2634	>	if result and (Buffer <> nil) then
2635	>	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do
2636	>	begin
2637	>	Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs;
2638	>	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
2639	>	begin
2640	>	if fdDataLength <= Field.Size then
2641	>	begin
2642	>	Move(Data^, Buffer^, fdDataLength);
2643	>	PChar(Buffer)[fdDataLength] := #0;
2644	>	end
2645	>	else
2646	>	IBError(ibxeFieldSizeError,[Field.FieldName])
2647	>	end
2648	>	else
2649	>	Move(Data^, Buffer^, Field.DataSize);
2650	>	end;
2651	>	end;
2652	>	end;
2653	>
2654	>	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
2655	>	opposed to 0-based indexes.
2656	>	This is because we want LastRecordNumber/RecordCount = 1 }
2657	>
2658	>	function TIBCustomDataSet.GetRecNo: Integer;
2659	>	begin
2660	>	if GetActiveBuf = nil then
2661	>	result := 0
2662	>	else
2663	>	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
2664	>	end;
2665	>
2666	>	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
2667	>	DoCheck: Boolean): TGetResult;
2668	>	var
2669	>	Accept: Boolean;
2670	>	SaveState: TDataSetState;
2671	>	begin
2672	>	Result := grOK;
2673	>	if Filtered and Assigned(OnFilterRecord) then
2674	>	begin
2675	>	Accept := False;
2676	>	SaveState := SetTempState(dsFilter);
2677	>	while not Accept do
2678	>	begin
2679	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2680	>	if Result <> grOK then
2681	>	break;
2682	>	FFilterBuffer := Buffer;
2683	>	try
2684	>	Accept := True;
2685	>	OnFilterRecord(Self, Accept);
2686	>	if not Accept and (GetMode = gmCurrent) then
2687	>	GetMode := gmPrior;
2688	>	except
2689	>	//        Application.HandleException(Self);
2690	>	end;
2691	>	end;
2692	>	RestoreState(SaveState);
2693	>	end
2694	>	else
2695	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2696	>	end;
2697	>
2698	>	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
2699	>	DoCheck: Boolean): TGetResult;
2700	>	begin
2701	>	result := grError;
2702	>	case GetMode of
2703	>	gmCurrent: begin
2704	>	if (FCurrentRecord >= 0) then begin
2705	>	if FCurrentRecord < FRecordCount then
2706	>	ReadRecordCache(FCurrentRecord, Buffer, False)
2707	>	else begin
2708	>	while (not FQSelect.EOF) and
2709	>	(FQSelect.Next <> nil) and
2710	>	(FCurrentRecord >= FRecordCount) do begin
2711	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
2712	>	Inc(FRecordCount);
2713	>	end;
2714	>	FCurrentRecord := FRecordCount - 1;
2715	>	if (FCurrentRecord >= 0) then
2716	>	ReadRecordCache(FCurrentRecord, Buffer, False);
2717	>	end;
2718	>	result := grOk;
2719	>	end else
2720	>	result := grBOF;
2721	>	end;
2722	>	gmNext: begin
2723	>	result := grOk;
2724	>	if FCurrentRecord = FRecordCount then
2725	>	result := grEOF
2726	>	else if FCurrentRecord = FRecordCount - 1 then begin
2727	>	if (not FQSelect.EOF) then begin
2728	>	FQSelect.Next;
2729	>	Inc(FCurrentRecord);
2730	>	end;
2731	>	if (FQSelect.EOF) then begin
2732	>	result := grEOF;
2733	>	end else begin
2734	>	Inc(FRecordCount);
2735	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
2736	>	end;
2737	>	end else if (FCurrentRecord < FRecordCount) then begin
2738	>	Inc(FCurrentRecord);
2739	>	ReadRecordCache(FCurrentRecord, Buffer, False);
2740	>	end;
2741	>	end;
2742	>	else { gmPrior }
2743	>	begin
2744	>	if (FCurrentRecord = 0) then begin
2745	>	Dec(FCurrentRecord);
2746	>	result := grBOF;
2747	>	end else if (FCurrentRecord > 0) and
2748	>	(FCurrentRecord <= FRecordCount) then begin
2749	>	Dec(FCurrentRecord);
2750	>	ReadRecordCache(FCurrentRecord, Buffer, False);
2751	>	result := grOk;
2752	>	end else if (FCurrentRecord = -1) then
2753	>	result := grBOF;
2754	>	end;
2755	>	end;
2756	>	if result = grOk then
2757	>	result := AdjustCurrentRecord(Buffer, GetMode);
2758	>	if result = grOk then with PRecordData(Buffer)^ do begin
2759	>	rdBookmarkFlag := bfCurrent;
2760	>	GetCalcFields(Buffer);
2761	>	end else if (result = grEOF) then begin
2762	>	CopyRecordBuffer(FModelBuffer, Buffer);
2763	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2764	>	end else if (result = grBOF) then begin
2765	>	CopyRecordBuffer(FModelBuffer, Buffer);
2766	>	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
2767	>	end else if (result = grError) then begin
2768	>	CopyRecordBuffer(FModelBuffer, Buffer);
2769	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2770	>	end;;
2771	>	end;
2772	>
2773	>	function TIBCustomDataSet.GetRecordCount: Integer;
2774	>	begin
2775	>	result := FRecordCount - FDeletedRecords;
2776	>	end;
2777	>
2778	>	function TIBCustomDataSet.GetRecordSize: Word;
2779	>	begin
2780	>	result := FRecordBufferSize;
2781	>	end;
2782	>
2783	>	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
2784	>	begin
2785	>	CheckEditState;
2786	>	begin
2787	>	{ When adding records, we *always* append.
2788	>	Insertion is just too costly }
2789	>	AdjustRecordOnInsert(Buffer);
2790	>	with PRecordData(Buffer)^ do
2791	>	begin
2792	>	rdUpdateStatus := usInserted;
2793	>	rdCachedUpdateStatus := cusInserted;
2794	>	end;
2795	>	if not CachedUpdates then
2796	>	InternalPostRecord(FQInsert, Buffer)
2797	>	else begin
2798	>	WriteRecordCache(FCurrentRecord, Buffer);
2799	>	FUpdatesPending := True;
2800	>	end;
2801	>	Inc(FRecordCount);
2802	>	InternalSetToRecord(Buffer);
2803	>	end
2804	>	end;
2805	>
2806	>	procedure TIBCustomDataSet.InternalCancel;
2807	>	var
2808	>	Buff: PChar;
2809	>	CurRec: Integer;
2810	>	begin
2811	>	inherited InternalCancel;
2812	>	Buff := GetActiveBuf;
2813	>	if Buff <> nil then begin
2814	>	CurRec := FCurrentRecord;
2815	>	AdjustRecordOnInsert(Buff);
2816	>	if (State = dsEdit) then begin
2817	>	CopyRecordBuffer(FOldBuffer, Buff);
2818	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2819	>	end else begin
2820	>	CopyRecordBuffer(FModelBuffer, Buff);
2821	>	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
2822	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2823	>	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
2824	>	FCurrentRecord := CurRec;
2825	>	end;
2826	>	end;
2827	>	end;
2828	>
2829	>
2830	>	procedure TIBCustomDataSet.InternalClose;
2831	>	begin
2832	>	if FDidActivate then
2833	>	DeactivateTransaction;
2834	>	FQSelect.Close;
2835	>	ClearBlobCache;
2836	>	FreeRecordBuffer(FModelBuffer);
2837	>	FreeRecordBuffer(FOldBuffer);
2838	>	FCurrentRecord := -1;
2839	>	FOpen := False;
2840	>	FRecordCount := 0;
2841	>	FDeletedRecords := 0;
2842	>	FRecordSize := 0;
2843	>	FBPos := 0;
2844	>	FOBPos := 0;
2845	>	FCacheSize := 0;
2846	>	FOldCacheSize := 0;
2847	>	FBEnd := 0;
2848	>	FOBEnd := 0;
2849	>	FreeMem(FBufferCache);
2850	>	FBufferCache := nil;
2851	>	FreeMem(FOldBufferCache);
2852	>	FOldBufferCache := nil;
2853	>	BindFields(False);
2854	>	if DefaultFields then DestroyFields;
2855	>	end;
2856	>
2857	>	procedure TIBCustomDataSet.InternalDelete;
2858	>	var
2859	>	Buff: PChar;
2860	>	SetCursor: Boolean;
2861	>	begin
2862	>	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2863	>	if SetCursor then
2864	>	Screen.Cursor := crHourGlass;
2865	>	try
2866	>	Buff := GetActiveBuf;
2867	>	if CanDelete then
2868	>	begin
2869	>	if not CachedUpdates then
2870	>	InternalDeleteRecord(FQDelete, Buff)
2871	>	else
2872	>	begin
2873	>	with PRecordData(Buff)^ do
2874	>	begin
2875	>	if rdCachedUpdateStatus = cusInserted then
2876	>	rdCachedUpdateStatus := cusUninserted
2877	>	else begin
2878	>	rdUpdateStatus := usDeleted;
2879	>	rdCachedUpdateStatus := cusDeleted;
2880	>	end;
2881	>	end;
2882	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2883	>	end;
2884	>	Inc(FDeletedRecords);
2885	>	FUpdatesPending := True;
2886	>	end else
2887	>	IBError(ibxeCannotDelete, [nil]);
2888	>	finally
2889	>	if SetCursor and (Screen.Cursor = crHourGlass) then
2890	>	Screen.Cursor := crDefault;
2891	>	end;
2892	>	end;
2893	>
2894	>	procedure TIBCustomDataSet.InternalFirst;
2895	>	begin
2896	>	FCurrentRecord := -1;
2897	>	end;
2898	>
2899	>	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
2900	>	begin
2901	>	FCurrentRecord := PInteger(Bookmark)^;
2902	>	end;
2903	>
2904	>	procedure TIBCustomDataSet.InternalHandleException;
2905	>	begin
2906	>	Application.HandleException(Self)
2907	>	end;
2908	>
2909	>	procedure TIBCustomDataSet.InternalInitFieldDefs;
2910	>	begin
2911	>	if not InternalPrepared then
2912	>	begin
2913	>	InternalPrepare;
2914	>	exit;
2915	>	end;
2916	>	FieldDefsFromQuery(FQSelect);
2917	>	end;
2918	>
2919	>	procedure TIBCustomDataSet.FieldDefsFromQuery(SourceQuery: TIBSQL);
2920	>	const
2921	>	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
2922	>	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
2923	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
2924	>	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
2925	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
2926	>	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
2927	>	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
2928	>	var
2929	>	FieldType: TFieldType;
2930	>	FieldSize: Word;
2931	>	FieldNullable : Boolean;
2932	>	i, FieldPosition, FieldPrecision: Integer;
2933	>	FieldAliasName, DBAliasName: string;
2934	>	RelationName, FieldName: string;
2935	>	Query : TIBSQL;
2936	>	FieldIndex: Integer;
2937	>	FRelationNodes : TRelationNode;
2938	>
2939	>	function Add_Node(Relation, Field : String) : TRelationNode;
2940	>	var
2941	>	FField : TFieldNode;
2942	>	begin
2943	>	if FRelationNodes.RelationName = '' then
2944	>	Result := FRelationNodes
2945	>	else
2946	>	begin
2947	>	Result := TRelationNode.Create;
2948	>	Result.NextRelation := FRelationNodes;
2949	>	end;
2950	>	Result.RelationName := Relation;
2951	>	FRelationNodes := Result;
2952	>	Query.Params[0].AsString := Relation;
2953	>	Query.ExecQuery;
2954	>	while not Query.Eof do
2955	>	begin
2956	>	FField := TFieldNode.Create;
2957	>	FField.FieldName := Query.Fields[2].AsString;
2958	>	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
2959	>	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
2960	>	FField.NextField := Result.FieldNodes;
2961	>	Result.FieldNodes := FField;
2962	>	Query.Next;
2963	>	end;
2964	>	Query.Close;
2965	>	end;
2966	>
2967	>	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
2968	>	var
2969	>	FRelation : TRelationNode;
2970	>	FField : TFieldNode;
2971	>	begin
2972	>	FRelation := FRelationNodes;
2973	>	while Assigned(FRelation) and
2974	>	(FRelation.RelationName <> Relation) do
2975	>	FRelation := FRelation.NextRelation;
2976	>	if not Assigned(FRelation) then
2977	>	FRelation := Add_Node(Relation, Field);
2978	>	Result := false;
2979	>	FField := FRelation.FieldNodes;
2980	>	while Assigned(FField) do
2981	>	if FField.FieldName = Field then
2982	>	begin
2983	>	Result := Ffield.COMPUTED_BLR;
2984	>	Exit;
2985	>	end
2986	>	else
2987	>	FField := Ffield.NextField;
2988	>	end;
2989	>
2990	>	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
2991	>	var
2992	>	FRelation : TRelationNode;
2993	>	FField : TFieldNode;
2994	>	begin
2995	>	FRelation := FRelationNodes;
2996	>	while Assigned(FRelation) and
2997	>	(FRelation.RelationName <> Relation) do
2998	>	FRelation := FRelation.NextRelation;
2999	>	if not Assigned(FRelation) then
3000	>	FRelation := Add_Node(Relation, Field);
3001	>	Result := false;
3002	>	FField := FRelation.FieldNodes;
3003	>	while Assigned(FField) do
3004	>	if FField.FieldName = Field then
3005	>	begin
3006	>	Result := Ffield.DEFAULT_VALUE;
3007	>	Exit;
3008	>	end
3009	>	else
3010	>	FField := Ffield.NextField;
3011	>	end;
3012	>
3013	>	Procedure FreeNodes;
3014	>	var
3015	>	FRelation : TRelationNode;
3016	>	FField : TFieldNode;
3017	>	begin
3018	>	while Assigned(FRelationNodes) do
3019	>	begin
3020	>	While Assigned(FRelationNodes.FieldNodes) do
3021	>	begin
3022	>	FField := FRelationNodes.FieldNodes.NextField;
3023	>	FRelationNodes.FieldNodes.Free;
3024	>	FRelationNodes.FieldNodes := FField;
3025	>	end;
3026	>	FRelation := FRelationNodes.NextRelation;
3027	>	FRelationNodes.Free;
3028	>	FRelationNodes := FRelation;
3029	>	end;
3030	>	end;
3031	>
3032	>	begin
3033	>	FRelationNodes := TRelationNode.Create;
3034	>	FNeedsRefresh := False;
3035	>	Database.InternalTransaction.StartTransaction;
3036	>	Query := TIBSQL.Create(self);
3037	>	try
3038	>	Query.Database := DataBase;
3039	>	Query.Transaction := Database.InternalTransaction;
3040	>	FieldDefs.BeginUpdate;
3041	>	FieldDefs.Clear;
3042	>	FieldIndex := 0;
3043	>	if (Length(FMappedFieldPosition) < SourceQuery.Current.Count) then
3044	>	SetLength(FMappedFieldPosition, SourceQuery.Current.Count);
3045	>	Query.SQL.Text := DefaultSQL;
3046	>	Query.Prepare;
3047	>	SetLength(FAliasNameMap, SourceQuery.Current.Count);
3048	>	for i := 0 to SourceQuery.Current.Count - 1 do
3049	>	with SourceQuery.Current[i].Data^ do
3050	>	begin
3051	>	{ Get the field name }
3052	>	FieldAliasName := SourceQuery.Current[i].Name;
3053	>	SetString(DBAliasName, aliasname, aliasname_length);
3054	>	SetString(RelationName, relname, relname_length);
3055	>	SetString(FieldName, sqlname, sqlname_length);
3056	>	FieldSize := 0;
3057	>	FieldPrecision := 0;
3058	>	FieldNullable := SourceQuery.Current[i].IsNullable;
3059	>	case sqltype and not 1 of
3060	>	{ All VARCHAR's must be converted to strings before recording
3061	>	their values }
3062	>	SQL_VARYING, SQL_TEXT:
3063	>	begin
3064	>	FieldSize := sqllen;
3065	>	FieldType := ftString;
3066	>	end;
3067	>	{ All Doubles/Floats should be cast to doubles }
3068	>	SQL_DOUBLE, SQL_FLOAT:
3069	>	FieldType := ftFloat;
3070	>	SQL_SHORT:
3071	>	begin
3072	>	if (sqlscale = 0) then
3073	>	FieldType := ftSmallInt
3074	>	else begin
3075	>	FieldType := ftBCD;
3076	>	FieldPrecision := 4;
3077	>	FieldSize := -sqlscale;
3078	>	end;
3079	>	end;
3080	>	SQL_LONG:
3081	>	begin
3082	>	if (sqlscale = 0) then
3083	>	FieldType := ftInteger
3084	>	else if (sqlscale >= (-4)) then
3085	>	begin
3086	>	FieldType := ftBCD;
3087	>	FieldPrecision := 9;
3088	>	FieldSize := -sqlscale;
3089	>	end
3090	>	else
3091	>	if Database.SQLDialect = 1 then
3092	>	FieldType := ftFloat
3093	>	else
3094	>	if (FieldCount > i) and (Fields[i] is TFloatField) then
3095	>	FieldType := ftFloat
3096	>	else
3097	>	begin
3098	>	FieldType := ftFMTBCD;
3099	>	FieldPrecision := 9;
3100	>	FieldSize := -sqlscale;
3101	>	end;
3102	>	end;
3103	>
3104	>	SQL_INT64:
3105	>	begin
3106	>	if (sqlscale = 0) then
3107	>	FieldType := ftLargeInt
3108	>	else if (sqlscale >= (-4)) then
3109	>	begin
3110	>	FieldType := ftBCD;
3111	>	FieldPrecision := 18;
3112	>	FieldSize := -sqlscale;
3113	>	end
3114	>	else
3115	>	FieldType := ftFloat
3116	>	end;
3117	>	SQL_TIMESTAMP: FieldType := ftDateTime;
3118	>	SQL_TYPE_TIME: FieldType := ftTime;
3119	>	SQL_TYPE_DATE: FieldType := ftDate;
3120	>	SQL_BLOB:
3121	>	begin
3122	>	FieldSize := sizeof (TISC_QUAD);
3123	>	if (sqlsubtype = 1) then
3124	>	FieldType := ftmemo
3125	>	else
3126	>	FieldType := ftBlob;
3127	>	end;
3128	>	SQL_ARRAY:
3129	>	begin
3130	>	FieldSize := sizeof (TISC_QUAD);
3131	>	FieldType := ftUnknown;
3132	>	end;
3133	>	else
3134	>	FieldType := ftUnknown;
3135	>	end;
3136	>	FieldPosition := i + 1;
3137	>	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
3138	>	begin
3139	>	FMappedFieldPosition[FieldIndex] := FieldPosition;
3140	>	Inc(FieldIndex);
3141	>	with FieldDefs.AddFieldDef do
3142	>	begin
3143	>	Name := FieldAliasName;
3144	>	FAliasNameMap[FieldNo-1] := DBAliasName;
3145	>	DataType := FieldType;
3146	>	Size := FieldSize;
3147	>	Precision := FieldPrecision;
3148	>	Required := not FieldNullable;
3149	>	InternalCalcField := False;
3150	>	if (FieldName <> '') and (RelationName <> '') then
3151	>	begin
3152	>	if Has_COMPUTED_BLR(RelationName, FieldName) then
3153	>	begin
3154	>	Attributes := [faReadOnly];
3155	>	InternalCalcField := True;
3156	>	FNeedsRefresh := True;
3157	>	end
3158	>	else
3159	>	begin
3160	>	if Has_DEFAULT_VALUE(RelationName, FieldName) then
3161	>	begin
3162	>	if not FieldNullable then
3163	>	Attributes := [faRequired];
3164	>	end
3165	>	else
3166	>	FNeedsRefresh := True;
3167	>	end;
3168	>	end;
3169	>	end;
3170	>	end;
3171	>	end;
3172	>	finally
3173	>	Query.free;
3174	>	FreeNodes;
3175	>	Database.InternalTransaction.Commit;
3176	>	FieldDefs.EndUpdate;
3177	>	end;
3178	>	end;
3179	>
3180	>	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
3181	>	begin
3182	>	CopyRecordBuffer(FModelBuffer, Buffer);
3183	>	end;
3184	>
3185	>	procedure TIBCustomDataSet.InternalLast;
3186	>	var
3187	>	Buffer: PChar;
3188	>	begin
3189	>	if (FQSelect.EOF) then
3190	>	FCurrentRecord := FRecordCount
3191	>	else begin
3192	>	Buffer := AllocRecordBuffer;
3193	>	try
3194	>	while FQSelect.Next <> nil do
3195	>	begin
3196	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3197	>	Inc(FRecordCount);
3198	>	end;
3199	>	FCurrentRecord := FRecordCount;
3200	>	finally
3201	>	FreeRecordBuffer(Buffer);
3202	>	end;
3203	>	end;
3204	>	end;
3205	>
3206	>	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
3207	>	var
3208	>	i: Integer;
3209	>	cur_param: TIBXSQLVAR;
3210	>	cur_field: TField;
3211	>	s: TStream;
3212	>	begin
3213	>	if FQSelect.SQL.Text = '' then
3214	>	IBError(ibxeEmptyQuery, [nil]);
3215	>	if not FInternalPrepared then
3216	>	InternalPrepare;
3217	>	if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
3218	>	begin
3219	>	for i := 0 to SQLParams.Count - 1 do
3220	>	begin
3221	>	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
3222	>	cur_param := SQLParams[i];
3223	>	if (cur_field <> nil) then begin
3224	>	if (cur_field.IsNull) then
3225	>	cur_param.IsNull := True
3226	>	else case cur_field.DataType of
3227	>	ftString:
3228	>	cur_param.AsString := cur_field.AsString;
3229	>	ftBoolean, ftSmallint, ftWord:
3230	>	cur_param.AsShort := cur_field.AsInteger;
3231	>	ftInteger:
3232	>	cur_param.AsLong := cur_field.AsInteger;
3233	>	ftLargeInt:
3234	>	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
3235	>	ftFloat, ftCurrency:
3236	>	cur_param.AsDouble := cur_field.AsFloat;
3237	>	ftBCD:
3238	>	cur_param.AsCurrency := cur_field.AsCurrency;
3239	>	ftDate:
3240	>	cur_param.AsDate := cur_field.AsDateTime;
3241	>	ftTime:
3242	>	cur_param.AsTime := cur_field.AsDateTime;
3243	>	ftDateTime:
3244	>	cur_param.AsDateTime := cur_field.AsDateTime;
3245	>	ftBlob, ftMemo:
3246	>	begin
3247	>	s := nil;
3248	>	try
3249	>	s := DataSource.DataSet.
3250	>	CreateBlobStream(cur_field, bmRead);
3251	>	cur_param.LoadFromStream(s);
3252	>	finally
3253	>	s.free;
3254	>	end;
3255	>	end;
3256	>	else
3257	>	IBError(ibxeNotSupported, [nil]);
3258	>	end;
3259	>	end;
3260	>	end;
3261	>	end;
3262	>	end;
3263	>
3264	>	procedure TIBCustomDataSet.ReQuery;
3265	>	begin
3266	>	FQSelect.Close;
3267	>	ClearBlobCache;
3268	>	FCurrentRecord := -1;
3269	>	FRecordCount := 0;
3270	>	FDeletedRecords := 0;
3271	>	FBPos := 0;
3272	>	FOBPos := 0;
3273	>	FBEnd := 0;
3274	>	FOBEnd := 0;
3275	>	FQSelect.Close;
3276	>	FQSelect.ExecQuery;
3277	>	FOpen := FQSelect.Open;
3278	>	First;
3279	>	end;
3280	>
3281	>	procedure TIBCustomDataSet.InternalOpen;
3282	>	var
3283	>	SetCursor: Boolean;
3284	>
3285	>	function RecordDataLength(n: Integer): Long;
3286	>	begin
3287	>	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
3288	>	end;
3289	>
3290	>	begin
3291	>	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3292	>	if SetCursor then
3293	>	Screen.Cursor := crHourGlass;
3294	>	try
3295	>	ActivateConnection;
3296	>	ActivateTransaction;
3297	>	if FQSelect.SQL.Text = '' then
3298	>	IBError(ibxeEmptyQuery, [nil]);
3299	>	if not FInternalPrepared then
3300	>	InternalPrepare;
3301	>	if FQSelect.SQLType = SQLSelect then
3302	>	begin
3303	>	if DefaultFields then
3304	>	CreateFields;
3305	>	BindFields(True);
3306	>	FCurrentRecord := -1;
3307	>	FQSelect.ExecQuery;
3308	>	FOpen := FQSelect.Open;
3309	>
3310	>	{ Initialize offsets, buffer sizes, etc...
3311	>	1. Initially FRecordSize is just the "RecordDataLength".
3312	>	2. Allocate a "model" buffer and do a dummy fetch
3313	>	3. After the dummy fetch, FRecordSize will be appropriately
3314	>	adjusted to reflect the additional "weight" of the field
3315	>	data.
3316	>	4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize.
3317	>	5. Now, with the BufferSize available, allocate memory for chunks of records
3318	>	6. Re-allocate the model buffer, accounting for the new
3319	>	FRecordBufferSize.
3320	>	7. Finally, calls to AllocRecordBuffer will work!.
3321	>	}
3322	>	{Step 1}
3323	>	FRecordSize := RecordDataLength(FQSelect.Current.Count);
3324	>	{Step 2, 3}
3325	>	IBAlloc(FModelBuffer, 0, FRecordSize);
3326	>	FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer);
3327	>	{Step 4}
3328	>	FCalcFieldsOffset := FRecordSize;
3329	>	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
3330	>	FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
3331	>	{Step 5}
3332	>	if UniDirectional then
3333	>	FBufferChunkSize := FRecordBufferSize * UniCache
3334	>	else
3335	>	FBufferChunkSize := FRecordBufferSize * BufferChunks;
3336	>	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
3337	>	if FCachedUpdates or (csReading in ComponentState) then
3338	>	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
3339	>	FBPos := 0;
3340	>	FOBPos := 0;
3341	>	FBEnd := 0;
3342	>	FOBEnd := 0;
3343	>	FCacheSize := FBufferChunkSize;
3344	>	FOldCacheSize := FBufferChunkSize;
3345	>	{Step 6}
3346	>	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count),
3347	>	FRecordBufferSize);
3348	>	{Step 7}
3349	>	FOldBuffer := AllocRecordBuffer;
3350	>	end
3351	>	else
3352	>	FQSelect.ExecQuery;
3353	>	finally
3354	>	if SetCursor and (Screen.Cursor = crHourGlass) then
3355	>	Screen.Cursor := crDefault;
3356	>	end;
3357	>	end;
3358	>
3359	>	procedure TIBCustomDataSet.InternalPost;
3360	>	var
3361	>	Qry: TIBSQL;
3362	>	Buff: PChar;
3363	>	SetCursor: Boolean;
3364	>	bInserting: Boolean;
3365	>	begin
3366	>	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3367	>	if SetCursor then
3368	>	Screen.Cursor := crHourGlass;
3369	>	try
3370	>	Buff := GetActiveBuf;
3371	>	CheckEditState;
3372	>	AdjustRecordOnInsert(Buff);
3373	>	if (State = dsInsert) then
3374	>	begin
3375	>	bInserting := True;
3376	>	Qry := FQInsert;
3377	>	PRecordData(Buff)^.rdUpdateStatus := usInserted;
3378	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3379	>	WriteRecordCache(FRecordCount, Buff);
3380	>	FCurrentRecord := FRecordCount;
3381	>	end
3382	>	else begin
3383	>	bInserting := False;
3384	>	Qry := FQModify;
3385	>	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
3386	>	begin
3387	>	PRecordData(Buff)^.rdUpdateStatus := usModified;
3388	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
3389	>	end
3390	>	else if PRecordData(Buff)^.
3391	>	rdCachedUpdateStatus = cusUninserted then
3392	>	begin
3393	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3394	>	Dec(FDeletedRecords);
3395	>	end;
3396	>	end;
3397	>	if (not CachedUpdates) then
3398	>	InternalPostRecord(Qry, Buff)
3399	>	else begin
3400	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3401	>	FUpdatesPending := True;
3402	>	end;
3403	>	if bInserting then
3404	>	Inc(FRecordCount);
3405	>	finally
3406	>	if SetCursor and (Screen.Cursor = crHourGlass) then
3407	>	Screen.Cursor := crDefault;
3408	>	end;
3409	>	end;
3410	>
3411	>	procedure TIBCustomDataSet.InternalRefresh;
3412	>	begin
3413	>	inherited InternalRefresh;
3414	>	InternalRefreshRow;
3415	>	end;
3416	>
3417	>	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
3418	>	begin
3419	>	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
3420	>	end;
3421	>
3422	>	function TIBCustomDataSet.IsCursorOpen: Boolean;
3423	>	begin
3424	>	result := FOpen;
3425	>	end;
3426	>
3427	>	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
3428	>	Options: TLocateOptions): Boolean;
3429	>	var
3430	>	{$IF FPC_FULLVERSION >= 20700 }
3431	>	CurBookmark: TBookmark;
3432	>	{$ELSE}
3433	>	CurBookmark: string;
3434	>	{$ENDIF}
3435	>	begin
3436	>	DisableControls;
3437	>	try
3438	>	CurBookmark := Bookmark;
3439	>	First;
3440	>	result := InternalLocate(KeyFields, KeyValues, Options);
3441	>	if not result then
3442	>	Bookmark := CurBookmark;
3443	>	finally
3444	>	EnableControls;
3445	>	end;
3446	>	end;
3447	>
3448	>	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
3449	>	const ResultFields: string): Variant;
3450	>	var
3451	>	fl: TList;
3452	>	{$IF FPC_FULLVERSION >= 20700 }
3453	>	CurBookmark: TBookmark;
3454	>	{$ELSE}
3455	>	CurBookmark: string;
3456	>	{$ENDIF}
3457	>	begin
3458	>	DisableControls;
3459	>	fl := TList.Create;
3460	>	CurBookmark := Bookmark;
3461	>	try
3462	>	First;
3463	>	if InternalLocate(KeyFields, KeyValues, []) then
3464	>	begin
3465	>	if (ResultFields <> '') then
3466	>	result := FieldValues[ResultFields]
3467	>	else
3468	>	result := NULL;
3469	>	end
3470	>	else
3471	>	result := Null;
3472	>	finally
3473	>	Bookmark := CurBookmark;
3474	>	fl.Free;
3475	>	EnableControls;
3476	>	end;
3477	>	end;
3478	>
3479	>	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
3480	>	begin
3481	>	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
3482	>	end;
3483	>
3484	>	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
3485	>	begin
3486	>	PRecordData(Buffer)^.rdBookmarkFlag := Value;
3487	>	end;
3488	>
3489	>	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
3490	>	begin
3491	>	if not Value and FCachedUpdates then
3492	>	CancelUpdates;
3493	>	if (not (csReading in ComponentState)) and Value then
3494	>	CheckDatasetClosed;
3495	>	FCachedUpdates := Value;
3496	>	end;
3497	>
3498	>	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
3499	>	begin
3500	>	if IsLinkedTo(Value) then
3501	>	IBError(ibxeCircularReference, [nil]);
3502	>	if FDataLink <> nil then
3503	>	FDataLink.DataSource := Value;
3504	>	end;
3505	>
3506	>	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
3507	>	var
3508	>	Buff, TmpBuff: PChar;
3509	>	begin
3510	>	Buff := GetActiveBuf;
3511	>	if Field.FieldNo < 0 then
3512	>	begin
3513	>	TmpBuff := Buff + FRecordSize + Field.Offset;
3514	>	Boolean(TmpBuff[0]) := LongBool(Buffer);
3515	>	if Boolean(TmpBuff[0]) then
3516	>	Move(Buffer^, TmpBuff[1], Field.DataSize);
3517	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3518	>	end
3519	>	else begin
3520	>	CheckEditState;
3521	>	with PRecordData(Buff)^ do
3522	>	begin
3523	>	{ If inserting, Adjust record position }
3524	>	AdjustRecordOnInsert(Buff);
3525	>	if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
3526	>	(FMappedFieldPosition[Field.FieldNo - 1] <= rdFieldCount) then
3527	>	begin
3528	>	Field.Validate(Buffer);
3529	>	if (Buffer = nil) or
3530	>	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
3531	>	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull := True
3532	>	else begin
3533	>	Move(Buffer^, Buff[rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs],
3534	>	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataSize);
3535	>	if (rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataType = SQL_TEXT) or
3536	>	(rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataType = SQL_VARYING) then
3537	>	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataLength := StrLen(PChar(Buffer));
3538	>	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull := False;
3539	>	if rdUpdateStatus = usUnmodified then
3540	>	begin
3541	>	if CachedUpdates then
3542	>	begin
3543	>	FUpdatesPending := True;
3544	>	if State = dsInsert then
3545	>	rdCachedUpdateStatus := cusInserted
3546	>	else if State = dsEdit then
3547	>	rdCachedUpdateStatus := cusModified;
3548	>	end;
3549	>
3550	>	if State = dsInsert then
3551	>	rdUpdateStatus := usInserted
3552	>	else
3553	>	rdUpdateStatus := usModified;
3554	>	end;
3555	>	WriteRecordCache(rdRecordNumber, Buff);
3556	>	SetModified(True);
3557	>	end;
3558	>	end;
3559	>	end;
3560	>	end;
3561	>	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
3562	>	DataEvent(deFieldChange, PtrInt(Field));
3563	>	end;
3564	>
3565	>	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
3566	>	begin
3567	>	CheckBrowseMode;
3568	>	if (Value < 1) then
3569	>	Value := 1
3570	>	else if Value > FRecordCount then
3571	>	begin
3572	>	InternalLast;
3573	>	Value := Min(FRecordCount, Value);
3574	>	end;
3575	>	if (Value <> RecNo) then
3576	>	begin
3577	>	DoBeforeScroll;
3578	>	FCurrentRecord := Value - 1;
3579	>	Resync([]);
3580	>	DoAfterScroll;
3581	>	end;
3582	>	end;
3583	>
3584	>	procedure TIBCustomDataSet.Disconnect;
3585	>	begin
3586	>	Close;
3587	>	InternalUnPrepare;
3588	>	end;
3589	>
3590	>	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
3591	>	begin
3592	>	if not CanModify then
3593	>	IBError(ibxeCannotUpdate, [nil])
3594	>	else
3595	>	FUpdateMode := Value;
3596	>	end;
3597	>
3598	>
3599	>	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
3600	>	begin
3601	>	if Value <> FUpdateObject then
3602	>	begin
3603	>	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
3604	>	FUpdateObject.DataSet := nil;
3605	>	FUpdateObject := Value;
3606	>	if Assigned(FUpdateObject) then
3607	>	begin
3608	>	if Assigned(FUpdateObject.DataSet) and
3609	>	(FUpdateObject.DataSet <> Self) then
3610	>	FUpdateObject.DataSet.UpdateObject := nil;
3611	>	FUpdateObject.DataSet := Self;
3612	>	end;
3613	>	end;
3614	>	end;
3615	>
3616	>	function TIBCustomDataSet.ConstraintsStored: Boolean;
3617	>	begin
3618	>	Result := Constraints.Count > 0;
3619	>	end;
3620	>
3621	>	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
3622	>	begin
3623	>	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
3624	>	end;
3625	>
3626	>
3627	>	procedure TIBCustomDataSet.InternalUnPrepare;
3628	>	begin
3629	>	if FInternalPrepared then
3630	>	begin
3631	>	CheckDatasetClosed;
3632	>	FieldDefs.Clear;
3633	>	FieldDefs.Updated := false;
3634	>	FInternalPrepared := False;
3635	>	end;
3636	>	end;
3637	>
3638	>	procedure TIBCustomDataSet.InternalExecQuery;
3639	>	var
3640	>	DidActivate: Boolean;
3641	>	SetCursor: Boolean;
3642	>	begin
3643	>	DidActivate := False;
3644	>	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3645	>	if SetCursor then
3646	>	Screen.Cursor := crHourGlass;
3647	>	try
3648	>	ActivateConnection;
3649	>	DidActivate := ActivateTransaction;
3650	>	if FQSelect.SQL.Text = '' then
3651	>	IBError(ibxeEmptyQuery, [nil]);
3652	>	if not FInternalPrepared then
3653	>	InternalPrepare;
3654	>	if FQSelect.SQLType = SQLSelect then
3655	>	begin
3656	>	IBError(ibxeIsASelectStatement, [nil]);
3657	>	end
3658	>	else
3659	>	FQSelect.ExecQuery;
3660	>	finally
3661	>	if DidActivate then
3662	>	DeactivateTransaction;
3663	>	if SetCursor and (Screen.Cursor = crHourGlass) then
3664	>	Screen.Cursor := crDefault;
3665	>	end;
3666	>	end;
3667	>
3668	>	function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE;
3669	>	begin
3670	>	Result := FQSelect.Handle;
3671	>	end;
3672	>
3673	>	procedure TIBCustomDataSet.SetGenerateParamNames(AValue: Boolean);
3674	>	begin
3675	>	if FGenerateParamNames = AValue then Exit;
3676	>	FGenerateParamNames := AValue;
3677	>	Disconnect
3678	>	end;
3679	>
3680	>	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
3681	>	begin
3682	>	inherited InitRecord(Buffer);
3683	>	with PRecordData(Buffer)^ do
3684	>	begin
3685	>	rdUpdateStatus := TUpdateStatus(usInserted);
3686	>	rdBookMarkFlag := bfInserted;
3687	>	rdRecordNumber := -1;
3688	>	end;
3689	>	end;
3690	>
3691	>	procedure TIBCustomDataSet.InternalInsert;
3692	>	begin
3693	>	CursorPosChanged;
3694	>	end;
3695	>
3696	>	{ TIBDataSet IProviderSupport }
3697	>
3698	>	(*procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
3699	>	begin
3700	>	if Commit then
3701	>	Transaction.Commit else
3702	>	Transaction.Rollback;
3703	>	end;
3704	>
3705	>	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
3706	>	ResultSet: Pointer = nil): Integer;
3707	>	var
3708	>	FQuery: TIBQuery;
3709	>	begin
3710	>	if Assigned(ResultSet) then
3711	>	begin
3712	>	TDataSet(ResultSet^) := TIBQuery.Create(nil);
3713	>	with TIBQuery(ResultSet^) do
3714	>	begin
3715	>	SQL.Text := ASQL;
3716	>	Params.Assign(AParams);
3717	>	Open;
3718	>	Result := RowsAffected;
3719	>	end;
3720	>	end
3721	>	else
3722	>	begin
3723	>	FQuery := TIBQuery.Create(nil);
3724	>	try
3725	>	FQuery.Database := Database;
3726	>	FQuery.Transaction := Transaction;
3727	>	FQuery.GenerateParamNames := True;
3728	>	FQuery.SQL.Text := ASQL;
3729	>	FQuery.Params.Assign(AParams);
3730	>	FQuery.ExecSQL;
3731	>	Result := FQuery.RowsAffected;
3732	>	finally
3733	>	FQuery.Free;
3734	>	end;
3735	>	end;
3736	>	end;
3737	>
3738	>	function TIBCustomDataSet.PSGetQuoteChar: string;
3739	>	begin
3740	>	if Database.SQLDialect = 3 then
3741	>	Result := '"' else
3742	>	Result := '';
3743	>	end;
3744	>
3745	>	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
3746	>	var
3747	>	PrevErr: Integer;
3748	>	begin
3749	>	if Prev <> nil then
3750	>	PrevErr := Prev.ErrorCode else
3751	>	PrevErr := 0;
3752	>	if E is EIBError then
3753	>	with EIBError(E) do
3754	>	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
3755	>	Result := inherited PSGetUpdateException(E, Prev);
3756	>	end;
3757	>
3758	>	function TIBCustomDataSet.PSInTransaction: Boolean;
3759	>	begin
3760	>	Result := Transaction.InTransaction;
3761	>	end;
3762	>
3763	>	function TIBCustomDataSet.PSIsSQLBased: Boolean;
3764	>	begin
3765	>	Result := True;
3766	>	end;
3767	>
3768	>	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
3769	>	begin
3770	>	Result := True;
3771	>	end;
3772	>
3773	>	procedure TIBCustomDataSet.PSReset;
3774	>	begin
3775	>	inherited PSReset;
3776	>	if Active then
3777	>	begin
3778	>	Close;
3779	>	Open;
3780	>	end;
3781	>	end;
3782	>
3783	>	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
3784	>	var
3785	>	UpdateAction: TIBUpdateAction;
3786	>	SQL: string;
3787	>	Params: TParams;
3788	>
3789	>	procedure AssignParams(DataSet: TDataSet; Params: TParams);
3790	>	var
3791	>	I: Integer;
3792	>	Old: Boolean;
3793	>	Param: TParam;
3794	>	PName: string;
3795	>	Field: TField;
3796	>	Value: Variant;
3797	>	begin
3798	>	for I := 0 to Params.Count - 1 do
3799	>	begin
3800	>	Param := Params[I];
3801	>	PName := Param.Name;
3802	>	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
3803	>	if Old then System.Delete(PName, 1, 4);
3804	>	Field := DataSet.FindField(PName);
3805	>	if not Assigned(Field) then Continue;
3806	>	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
3807	>	begin
3808	>	Value := Field.NewValue;
3809	>	if VarIsEmpty(Value) then Value := Field.OldValue;
3810	>	Param.AssignFieldValue(Field, Value);
3811	>	end;
3812	>	end;
3813	>	end;
3814	>
3815	>	begin
3816	>	Result := False;
3817	>	if Assigned(OnUpdateRecord) then
3818	>	begin
3819	>	UpdateAction := uaFail;
3820	>	if Assigned(FOnUpdateRecord) then
3821	>	begin
3822	>	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
3823	>	Result := UpdateAction = uaApplied;
3824	>	end;
3825	>	end
3826	>	else if Assigned(FUpdateObject) then
3827	>	begin
3828	>	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
3829	>	if SQL <> '' then
3830	>	begin
3831	>	Params := TParams.Create;
3832	>	try
3833	>	Params.ParseSQL(SQL, True);
3834	>	AssignParams(Delta, Params);
3835	>	if PSExecuteStatement(SQL, Params) = 0 then
3836	>	IBError(ibxeNoRecordsAffected, [nil]);
3837	>	Result := True;
3838	>	finally
3839	>	Params.Free;
3840	>	end;
3841	>	end;
3842	>	end;
3843	>	end;
3844	>
3845	>	procedure TIBCustomDataSet.PSStartTransaction;
3846	>	begin
3847	>	ActivateConnection;
3848	>	Transaction.StartTransaction;
3849	>	end;
3850	>
3851	>	function TIBCustomDataSet.PSGetTableName: string;
3852	>	begin
3853	>	//  if not FInternalPrepared then
3854	>	//    InternalPrepare;
3855	>	{ It is possible for the FQSelectSQL to be unprepared
3856	>	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
3857	>	So check the Prepared of the SelectSQL instead }
3858	>	if not FQSelect.Prepared then
3859	>	FQSelect.Prepare;
3860	>	Result := FQSelect.UniqueRelationName;
3861	>	end;*)
3862	>
3863	>	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
3864	>	begin
3865	>	InternalBatchInput(InputObject);
3866	>	end;
3867	>
3868	>	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
3869	>	begin
3870	>	InternalBatchOutput(OutputObject);
3871	>	end;
3872	>
3873	>	procedure TIBDataSet.ExecSQL;
3874	>	begin
3875	>	InternalExecQuery;
3876	>	end;
3877	>
3878	>	procedure TIBDataSet.Prepare;
3879	>	begin
3880	>	InternalPrepare;
3881	>	end;
3882	>
3883	>	procedure TIBDataSet.UnPrepare;
3884	>	begin
3885	>	InternalUnPrepare;
3886	>	end;
3887	>
3888	>	function TIBDataSet.GetPrepared: Boolean;
3889	>	begin
3890	>	Result := InternalPrepared;
3891	>	end;
3892	>
3893	>	procedure TIBDataSet.InternalOpen;
3894	>	begin
3895	>	ActivateConnection;
3896	>	ActivateTransaction;
3897	>	InternalSetParamsFromCursor;
3898	>	Inherited InternalOpen;
3899	>	end;
3900	>
3901	>	procedure TIBDataSet.SetFiltered(Value: Boolean);
3902	>	begin
3903	>	if(Filtered <> Value) then
3904	>	begin
3905	>	inherited SetFiltered(value);
3906	>	if Active then
3907	>	begin
3908	>	Close;
3909	>	Open;
3910	>	end;
3911	>	end
3912	>	else
3913	>	inherited SetFiltered(value);
3914	>	end;
3915	>
3916	>	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
3917	>	begin
3918	>	Result := false;
3919	>	if not Assigned(Bookmark) then
3920	>	exit;
3921	>	Result := PInteger(Bookmark)^ < FRecordCount;
3922	>	end;
3923	>
3924	>	function TIBCustomDataSet.GetFieldData(Field: TField;
3925	>	Buffer: Pointer): Boolean;
3926	>	{$IFDEF TBCDFIELD_IS_BCD}
3927	>	var
3928	>	lTempCurr : System.Currency;
3929	>	begin
3930	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
3931	>	begin
3932	>	Result := InternalGetFieldData(Field, @lTempCurr);
3933	>	if Result then
3934	>	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
3935	>	end
3936	>	else
3937	>	{$ELSE}
3938	>	begin
3939	>	{$ENDIF}
3940	>	Result := InternalGetFieldData(Field, Buffer);
3941	>	end;
3942	>
3943	>	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
3944	>	NativeFormat: Boolean): Boolean;
3945	>	begin
3946	>	if (Field.DataType = ftBCD) and not NativeFormat then
3947	>	Result := InternalGetFieldData(Field, Buffer)
3948	>	else
3949	>	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
3950	>	end;
3951	>
3952	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
3953	>	{$IFDEF TDBDFIELD_IS_BCD}
3954	>	var
3955	>	lTempCurr : System.Currency;
3956	>	begin
3957	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
3958	>	begin
3959	>	BCDToCurr(TBCD(Buffer^), lTempCurr);
3960	>	InternalSetFieldData(Field, @lTempCurr);
3961	>	end
3962	>	else
3963	>	{$ELSE}
3964	>	begin
3965	>	{$ENDIF}
3966	>	InternalSetFieldData(Field, Buffer);
3967	>	end;
3968	>
3969	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
3970	>	NativeFormat: Boolean);
3971	>	begin
3972	>	if (not NativeFormat) and (Field.DataType = ftBCD) then
3973	>	InternalSetfieldData(Field, Buffer)
3974	>	else
3975	>	inherited SetFieldData(Field, buffer, NativeFormat);
3976	>	end;
3977	>
3978	>	{ TIBDataSetUpdateObject }
3979	>
3980	>	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
3981	>	begin
3982	>	inherited Create(AOwner);
3983	>	FRefreshSQL := TStringList.Create;
3984	>	end;
3985	>
3986	>	destructor TIBDataSetUpdateObject.Destroy;
3987	>	begin
3988	>	FRefreshSQL.Free;
3989	>	inherited Destroy;
3990	>	end;
3991	>
3992	>	procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings);
3993	>	begin
3994	>	FRefreshSQL.Assign(Value);
3995	>	end;
3996	>
3997	>	procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
3998	>	begin
3999	>	if not Assigned(DataSet) then Exit;
4000	>	DataSet.SetInternalSQLParams(Query, buff);
4001	>	end;
4002	>
4003	>	{ TIBDSBlobStream }
4004	>	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
4005	>	Mode: TBlobStreamMode);
4006	>	begin
4007	>	FField := AField;
4008	>	FBlobStream := ABlobStream;
4009	>	FBlobStream.Seek(0, soFromBeginning);
4010	>	if (Mode = bmWrite) then
4011	>	FBlobStream.Truncate;
4012	>	end;
4013	>
4014	>	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
4015	>	begin
4016	>	result := FBlobStream.Read(Buffer, Count);
4017	>	end;
4018	>
4019	>	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
4020	>	begin
4021	>	result := FBlobStream.Seek(Offset, Origin);
4022	>	end;
4023	>
4024	>	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
4025	>	begin
4026	>	FBlobStream.SetSize(NewSize);
4027	>	end;
4028	>
4029	>	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
4030	>	begin
4031	>	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
4032	>	IBError(ibxeNotEditing, [nil]);
4033	>	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4034	>	TBlobField(FField).Modified := true;
4035	>	result := FBlobStream.Write(Buffer, Count);
4036	>	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4037	>	end;
4038	>
4039	>	{ TIBGenerator }
4040	>
4041	>	procedure TIBGenerator.SetIncrement(const AValue: integer);
4042	>	begin
4043	>	if AValue < 0 then
4044	>	raise Exception.Create('A Generator Increment cannot be negative');
4045	>	FIncrement := AValue
4046	>	end;
4047	>
4048	>	function TIBGenerator.GetNextValue(ADatabase: TIBDatabase;
4049	>	ATransaction: TIBTransaction): integer;
4050	>	begin
4051	>	with TIBSQL.Create(nil) do
4052	>	try
4053	>	Database := ADatabase;
4054	>	Transaction := ATransaction;
4055	>	if not assigned(Database) then
4056	>	IBError(ibxeCannotSetDatabase,[]);
4057	>	if not assigned(Transaction) then
4058	>	IBError(ibxeCannotSetTransaction,[]);
4059	>	with Transaction do
4060	>	if not InTransaction then StartTransaction;
4061	>	SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]);
4062	>	Prepare;
4063	>	ExecQuery;
4064	>	try
4065	>	Result := FieldByName('ID').AsInteger
4066	>	finally
4067	>	Close
4068	>	end;
4069	>	finally
4070	>	Free
4071	>	end;
4072	>	end;
4073	>
4074	>	constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
4075	>	begin
4076	>	FOwner := Owner;
4077	>	FIncrement := 1;
4078	>	end;
4079	>
4080	>
4081	>	procedure TIBGenerator.Apply;
4082	>	begin
4083	>	if (FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then
4084	>	Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction);
4085	>	end;
4086	>
4087	>	end.

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