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

Comparing ibx/trunk/runtime/IBCustomDataSet.pas (file contents):
Revision 21 by tony, Thu Feb 26 10:33:34 2015 UTC vs.
Revision 39 by tony, Tue May 17 08:14:52 2016 UTC

#	Line 1 | Line 1
1	<	{************************************************************************}
2	<	{                                                                        }
3	<	{       Borland Delphi Visual Component Library                          }
4	<	{       InterBase Express core components                                }
5	<	{                                                                        }
6	<	{       Copyright (c) 1998-2000 Inprise Corporation                      }
7	<	{                                                                        }
8	<	{    InterBase Express is based in part on the product                   }
9	<	{    Free IB Components, written by Gregory H. Deatz for                 }
10	<	{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
11	<	{    Free IB Components is used under license.                           }
12	<	{                                                                        }
13	<	{    The contents of this file are subject to the InterBase              }
14	<	{    Public License Version 1.0 (the "License"); you may not             }
15	<	{    use this file except in compliance with the License. You            }
16	<	{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	<	{    Software distributed under the License is distributed on            }
18	<	{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
19	<	{    express or implied. See the License for the specific language       }
20	<	{    governing rights and limitations under the License.                 }
21	<	{    The Original Code was created by InterBase Software Corporation     }
22	<	{       and its successors.                                              }
23	<	{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
24	<	{       Corporation. All Rights Reserved.                                }
25	<	{    Contributor(s): Jeff Overcash                                       }
26	<	{                                                                        }
27	<	{    IBX For Lazarus (Firebird Express)                                  }
28	<	{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	<	{    Portions created by MWA Software are copyright McCallum Whyman      }
30	<	{    Associates Ltd 2011                                                 }
31	<	{                                                                        }
32	<	{************************************************************************}
33	<
34	<	unit IBCustomDataSet;
35	<
36	<	{$R-}
37	<
38	<	{$Mode Delphi}
39	<
40	<	{$IFDEF DELPHI}
41	<	{$DEFINE TDBDFIELD_IS_BCD}
42	<	{$ENDIF}
43	<
44	<	interface
45	<
46	<	uses
47	<	{$IFDEF WINDOWS }
48	<	Windows,
49	<	{$ELSE}
50	<	unix,
51	<	{$ENDIF}
52	<	SysUtils, Classes, Forms, Controls, IBDatabase,
53	<	IBExternals, IB, IBHeader,  IBSQL, Db,
54	<	IBUtils, IBBlob, IBSQLParser;
55	<
56	<	const
57	<	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
58	<	UniCache           =  2;     { Uni-directional cache is 2 records big }
59	<
60	<	type
61	<	TIBCustomDataSet = class;
62	<	TIBDataSet = class;
63	<
64	<	{ TIBDataSetUpdateObject }
65	<
66	<	TIBDataSetUpdateObject = class(TComponent)
67	<	private
68	<	FRefreshSQL: TStrings;
69	<	procedure SetRefreshSQL(value: TStrings);
70	<	protected
71	<	function GetDataSet: TIBCustomDataSet; virtual; abstract;
72	<	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
73	<	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
74	<	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
75	<	procedure InternalSetParams(Query: TIBSQL; buff: PChar);
76	<	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
77	<	public
78	<	constructor Create(AOwner: TComponent); override;
79	<	destructor Destroy; override;
80	<	published
81	<	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
82	<	end;
83	<
84	<	TBlobDataArray = array[0..0] of TIBBlobStream;
85	<	PBlobDataArray = ^TBlobDataArray;
86	<
87	<	{ TIBCustomDataSet }
88	<	TFieldData = record
89	<	fdDataType: Short;
90	<	fdDataScale: Short;
91	<	fdNullable: Boolean;
92	<	fdIsNull: Boolean;
93	<	fdDataSize: Short;
94	<	fdDataLength: Short;
95	<	fdDataOfs: Integer;
96	<	end;
97	<	PFieldData = ^TFieldData;
98	<
99	<	TCachedUpdateStatus = (
100	<	cusUnmodified, cusModified, cusInserted,
101	<	cusDeleted, cusUninserted
102	<	);
103	<	TIBDBKey = record
104	<	DBKey: array[0..7] of Byte;
105	<	end;
106	<	PIBDBKey = ^TIBDBKey;
107	<
108	<	TRecordData = record
109	<	rdBookmarkFlag: TBookmarkFlag;
110	<	rdFieldCount: Short;
111	<	rdRecordNumber: Integer;
112	<	rdCachedUpdateStatus: TCachedUpdateStatus;
113	<	rdUpdateStatus: TUpdateStatus;
114	<	rdSavedOffset: DWORD;
115	<	rdDBKey: TIBDBKey;
116	<	rdFields: array[1..1] of TFieldData;
117	<	end;
118	<	PRecordData = ^TRecordData;
119	<
120	<	{ TIBStringField allows us to have strings longer than 8196 }
121	<
122	<	TIBStringField = class(TStringField)
123	<	public
124	<	constructor create(AOwner: TComponent); override;
125	<	class procedure CheckTypeSize(Value: Integer); override;
126	<	function GetAsString: string; override;
127	<	function GetAsVariant: Variant; override;
128	<	function GetValue(var Value: string): Boolean;
129	<	procedure SetAsString(const Value: string); override;
130	<	end;
131	<
132	<	{ TIBBCDField }
133	<	{  Actually, there is no BCD involved in this type,
134	<	instead it deals with currency types.
135	<	In IB, this is an encapsulation of Numeric (x, y)
136	<	where x < 18 and y <= 4.
137	<	Note: y > 4 will default to Floats
138	<	}
139	<	TIBBCDField = class(TBCDField)
140	<	protected
141	<	class procedure CheckTypeSize(Value: Integer); override;
142	<	function GetAsCurrency: Currency; override;
143	<	function GetAsString: string; override;
144	<	function GetAsVariant: Variant; override;
145	<	function GetDataSize: Integer; override;
146	<	public
147	<	constructor Create(AOwner: TComponent); override;
148	<	published
149	<	property Size default 8;
150	<	end;
151	<
152	<	TIBDataLink = class(TDetailDataLink)
153	<	private
154	<	FDataSet: TIBCustomDataSet;
155	<	protected
156	<	procedure ActiveChanged; override;
157	<	procedure RecordChanged(Field: TField); override;
158	<	function GetDetailDataSet: TDataSet; override;
159	<	procedure CheckBrowseMode; override;
160	<	public
161	<	constructor Create(ADataSet: TIBCustomDataSet);
162	<	destructor Destroy; override;
163	<	end;
164	<
165	<	TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord);
166	<
167	<	{ TIBGenerator }
168	<
169	<	TIBGenerator = class(TPersistent)
170	<	private
171	<	FOwner: TIBCustomDataSet;
172	<	FApplyOnEvent: TIBGeneratorApplyOnEvent;
173	<	FFieldName: string;
174	<	FGeneratorName: string;
175	<	FIncrement: integer;
176	<	procedure SetIncrement(const AValue: integer);
177	<	protected
178	<	function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer;
179	<	public
180	<	constructor Create(Owner: TIBCustomDataSet);
181	<	procedure Apply;
182	<	property Owner: TIBCustomDataSet read FOwner;
183	<	published
184	<	property Generator: string read FGeneratorName write FGeneratorName;
185	<	property Field: string read FFieldName write FFieldName;
186	<	property Increment: integer read FIncrement write SetIncrement default 1;
187	<	property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
188	<	end;
189	<
190	<	{ TIBCustomDataSet }
191	<	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
192	<
193	<	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
194	<	UpdateKind: TUpdateKind; var UpdateAction: TIBUpdateAction)
195	<	of object;
196	<	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
197	<	var UpdateAction: TIBUpdateAction) of object;
198	<
199	<	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
200	<
201	<	TIBCustomDataSet = class(TDataset)
202	<	private
203	<	FGenerateParamNames: Boolean;
204	<	FGeneratorField: TIBGenerator;
205	<	FNeedsRefresh: Boolean;
206	<	FForcedRefresh: Boolean;
207	<	FDidActivate: Boolean;
208	<	FIBLoaded: Boolean;
209	<	FBase: TIBBase;
210	<	FBlobCacheOffset: Integer;
211	<	FBlobStreamList: TList;
212	<	FBufferChunks: Integer;
213	<	FBufferCache,
214	<	FOldBufferCache: PChar;
215	<	FBufferChunkSize,
216	<	FCacheSize,
217	<	FOldCacheSize: Integer;
218	<	FFilterBuffer: PChar;
219	<	FBPos,
220	<	FOBPos,
221	<	FBEnd,
222	<	FOBEnd: DWord;
223	<	FCachedUpdates: Boolean;
224	<	FCalcFieldsOffset: Integer;
225	<	FCurrentRecord: Long;
226	<	FDeletedRecords: Long;
227	<	FModelBuffer,
228	<	FOldBuffer: PChar;
229	<	FOpen: Boolean;
230	<	FInternalPrepared: Boolean;
231	<	FQDelete,
232	<	FQInsert,
233	<	FQRefresh,
234	<	FQSelect,
235	<	FQModify: TIBSQL;
236	<	FRecordBufferSize: Integer;
237	<	FRecordCount: Integer;
238	<	FRecordSize: Integer;
239	<	FUniDirectional: Boolean;
240	<	FUpdateMode: TUpdateMode;
241	<	FUpdateObject: TIBDataSetUpdateObject;
242	<	FParamCheck: Boolean;
243	<	FUpdatesPending: Boolean;
244	<	FUpdateRecordTypes: TIBUpdateRecordTypes;
245	<	FMappedFieldPosition: array of Integer;
246	<	FDataLink: TIBDataLink;
247	<
248	<	FBeforeDatabaseDisconnect,
249	<	FAfterDatabaseDisconnect,
250	<	FDatabaseFree: TNotifyEvent;
251	<	FOnUpdateError: TIBUpdateErrorEvent;
252	<	FOnUpdateRecord: TIBUpdateRecordEvent;
253	<	FBeforeTransactionEnd,
254	<	FAfterTransactionEnd,
255	<	FTransactionFree: TNotifyEvent;
256	<	FAliasNameMap: array of string;
257	<	FAliasNameList: array of string;
258	<	FBaseSQLSelect: TStrings;
259	<	FParser: TSelectSQLParser;
260	<	function GetSelectStmtHandle: TISC_STMT_HANDLE;
261	<	procedure SetUpdateMode(const Value: TUpdateMode);
262	<	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
263	<
264	<	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
265	<	procedure AdjustRecordOnInsert(Buffer: Pointer);
266	<	function CanEdit: Boolean;
267	<	function CanInsert: Boolean;
268	<	function CanDelete: Boolean;
269	<	function CanRefresh: Boolean;
270	<	procedure CheckEditState;
271	<	procedure ClearBlobCache;
272	<	procedure CopyRecordBuffer(Source, Dest: Pointer);
273	<	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
274	<	procedure DoAfterDatabaseDisconnect(Sender: TObject);
275	<	procedure DoDatabaseFree(Sender: TObject);
276	<	procedure DoBeforeTransactionEnd(Sender: TObject);
277	<	procedure DoAfterTransactionEnd(Sender: TObject);
278	<	procedure DoTransactionFree(Sender: TObject);
279	<	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
280	<	Buffer: PChar);
281	<	function GetDatabase: TIBDatabase;
282	<	function GetDBHandle: PISC_DB_HANDLE;
283	<	function GetDeleteSQL: TStrings;
284	<	function GetInsertSQL: TStrings;
285	<	function GetSQLParams: TIBXSQLDA;
286	<	function GetRefreshSQL: TStrings;
287	<	function GetSelectSQL: TStrings;
288	<	function GetStatementType: TIBSQLTypes;
289	<	function GetModifySQL: TStrings;
290	<	function GetTransaction: TIBTransaction;
291	<	function GetTRHandle: PISC_TR_HANDLE;
292	<	function GetParser: TSelectSQLParser;
293	<	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
294	<	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
295	<	Options: TLocateOptions): Boolean; virtual;
296	<	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
297	<	procedure InternalRevertRecord(RecordNumber: Integer); virtual;
298	<	function IsVisible(Buffer: PChar): Boolean;
299	<	procedure SaveOldBuffer(Buffer: PChar);
300	<	procedure SetBufferChunks(Value: Integer);
301	<	procedure SetDatabase(Value: TIBDatabase);
302	<	procedure SetDeleteSQL(Value: TStrings);
303	<	procedure SetInsertSQL(Value: TStrings);
304	<	procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
305	<	procedure SetRefreshSQL(Value: TStrings);
306	<	procedure SetSelectSQL(Value: TStrings);
307	<	procedure SetModifySQL(Value: TStrings);
308	<	procedure SetTransaction(Value: TIBTransaction);
309	<	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
310	<	procedure SetUniDirectional(Value: Boolean);
311	<	procedure RefreshParams;
312	<	procedure SQLChanging(Sender: TObject); virtual;
313	<	function AdjustPosition(FCache: PChar; Offset: DWORD;
314	<	Origin: Integer): DWORD;
315	<	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
316	<	Buffer: PChar);
317	<	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
318	<	ReadOldBuffer: Boolean);
319	<	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
320	<	Buffer: PChar);
321	<	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
322	<	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
323	<	DoCheck: Boolean): TGetResult; virtual;
324	<
325	<	protected
326	<	procedure ActivateConnection;
327	<	function ActivateTransaction: Boolean;
328	<	procedure DeactivateTransaction;
329	<	procedure CheckDatasetClosed;
330	<	procedure CheckDatasetOpen;
331	<	function CreateParser: TSelectSQLParser; virtual;
332	<	procedure FieldDefsFromQuery(SourceQuery: TIBSQL);
333	<	function GetActiveBuf: PChar;
334	<	procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
335	<	procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
336	<	procedure InternalPrepare; virtual;
337	<	procedure InternalUnPrepare; virtual;
338	<	procedure InternalExecQuery; virtual;
339	<	procedure InternalRefreshRow; virtual;
340	<	procedure InternalSetParamsFromCursor; virtual;
341	<	procedure CheckNotUniDirectional;
342	<
343	<	(*    { IProviderSupport }
344	<	procedure PSEndTransaction(Commit: Boolean); override;
345	<	function PSExecuteStatement(const ASQL: string; AParams: TParams;
346	<	ResultSet: Pointer = nil): Integer; override;
347	<	function PsGetTableName: string; override;
348	<	function PSGetQuoteChar: string; override;
349	<	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
350	<	function PSInTransaction: Boolean; override;
351	<	function PSIsSQLBased: Boolean; override;
352	<	function PSIsSQLSupported: Boolean; override;
353	<	procedure PSStartTransaction; override;
354	<	procedure PSReset; override;
355	<	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
356	<	*)
357	<	{ TDataSet support }
358	<	procedure InternalInsert; override;
359	<	procedure InitRecord(Buffer: PChar); override;
360	<	procedure Disconnect; virtual;
361	<	function ConstraintsStored: Boolean;
362	<	procedure ClearCalcFields(Buffer: PChar); override;
363	<	function AllocRecordBuffer: PChar; override;
364	<	procedure DoBeforeDelete; override;
365	<	procedure DoBeforeEdit; override;
366	<	procedure DoBeforeInsert; override;
367	<	procedure DoAfterInsert; override;
368	<	procedure DoBeforeOpen; override;
369	<	procedure DoBeforePost; override;
370	<	procedure FreeRecordBuffer(var Buffer: PChar); override;
371	<	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
372	<	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
373	<	function GetCanModify: Boolean; override;
374	<	function GetDataSource: TDataSource; override;
375	<	function GetDBAliasName(FieldNo: integer): string;
376	<	function GetFieldDefFromAlias(aliasName: string): TFieldDef;
377	<	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
378	<	function GetRecNo: Integer; override;
379	<	function GetRecord(Buffer: PChar; GetMode: TGetMode;
380	<	DoCheck: Boolean): TGetResult; override;
381	<	function GetRecordCount: Integer; override;
382	<	function GetRecordSize: Word; override;
383	<	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
384	<	procedure InternalCancel; override;
385	<	procedure InternalClose; override;
386	<	procedure InternalDelete; override;
387	<	procedure InternalFirst; override;
388	<	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
389	<	procedure InternalGotoBookmark(Bookmark: Pointer); override;
390	<	procedure InternalHandleException; override;
391	<	procedure InternalInitFieldDefs; override;
392	<	procedure InternalInitRecord(Buffer: PChar); override;
393	<	procedure InternalLast; override;
394	<	procedure InternalOpen; override;
395	<	procedure InternalPost; override;
396	<	procedure InternalRefresh; override;
397	<	procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
398	<	procedure InternalSetToRecord(Buffer: PChar); override;
399	<	function IsCursorOpen: Boolean; override;
400	<	procedure Loaded; override;
401	<	procedure ReQuery;
402	<	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
403	<	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
404	<	procedure SetCachedUpdates(Value: Boolean);
405	<	procedure SetDataSource(Value: TDataSource);
406	<	procedure SetGenerateParamNames(AValue: Boolean); virtual;
407	<	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
408	<	procedure SetFieldData(Field : TField; Buffer : Pointer;
409	<	NativeFormat : Boolean); overload; override;
410	<	procedure SetRecNo(Value: Integer); override;
411	<
412	<	protected
413	<	{Likely to be made public by descendant classes}
414	<	property SQLParams: TIBXSQLDA read GetSQLParams;
415	<	property Params: TIBXSQLDA read GetSQLParams;
416	<	property InternalPrepared: Boolean read FInternalPrepared;
417	<	property QDelete: TIBSQL read FQDelete;
418	<	property QInsert: TIBSQL read FQInsert;
419	<	property QRefresh: TIBSQL read FQRefresh;
420	<	property QSelect: TIBSQL read FQSelect;
421	<	property QModify: TIBSQL read FQModify;
422	<	property StatementType: TIBSQLTypes read GetStatementType;
423	<	property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle;
424	<
425	<	{Likely to be made published by descendant classes}
426	<	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
427	<	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
428	<	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
429	<	property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
430	<	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
431	<	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
432	<	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
433	<	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
434	<	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
435	<	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
436	<	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
437	<	property Parser: TSelectSQLParser read GetParser;
438	<	property BaseSQLSelect: TStrings read FBaseSQLSelect;
439	<
440	<	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
441	<	write FBeforeDatabaseDisconnect;
442	<	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
443	<	write FAfterDatabaseDisconnect;
444	<	property DatabaseFree: TNotifyEvent read FDatabaseFree
445	<	write FDatabaseFree;
446	<	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
447	<	write FBeforeTransactionEnd;
448	<	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
449	<	write FAfterTransactionEnd;
450	<	property TransactionFree: TNotifyEvent read FTransactionFree
451	<	write FTransactionFree;
452	<
453	<	public
454	<	constructor Create(AOwner: TComponent); override;
455	<	destructor Destroy; override;
456	<	procedure ApplyUpdates;
457	<	function CachedUpdateStatus: TCachedUpdateStatus;
458	<	procedure CancelUpdates;
459	<	function GetFieldPosition(AliasName: string): integer;
460	<	procedure FetchAll;
461	<	function LocateNext(const KeyFields: string; const KeyValues: Variant;
462	<	Options: TLocateOptions): Boolean;
463	<	procedure RecordModified(Value: Boolean);
464	<	procedure RevertRecord;
465	<	procedure Undelete;
466	<	procedure ResetParser;
467	<	function HasParser: boolean;
468	<
469	<	{ TDataSet support methods }
470	<	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
471	<	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
472	<	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
473	<	function GetCurrentRecord(Buffer: PChar): Boolean; override;
474	<	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
475	<	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
476	<	function GetFieldData(Field : TField; Buffer : Pointer;
477	<	NativeFormat : Boolean) : Boolean; overload; override;
478	<	property GenerateParamNames: Boolean read FGenerateParamNames write SetGenerateParamNames;
479	<	function Locate(const KeyFields: string; const KeyValues: Variant;
480	<	Options: TLocateOptions): Boolean; override;
481	<	function Lookup(const KeyFields: string; const KeyValues: Variant;
482	<	const ResultFields: string): Variant; override;
483	<	function UpdateStatus: TUpdateStatus; override;
484	<	function IsSequenced: Boolean; override;
485	<	function ParamByName(ParamName: String): TIBXSQLVAR;
486	<	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
487	<	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
488	<	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
489	<	property UpdatesPending: Boolean read FUpdatesPending;
490	<	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
491	<	write SetUpdateRecordTypes;
492	<
493	<	published
494	<	property Database: TIBDatabase read GetDatabase write SetDatabase;
495	<	property Transaction: TIBTransaction read GetTransaction
496	<	write SetTransaction;
497	<	property ForcedRefresh: Boolean read FForcedRefresh
498	<	write FForcedRefresh default False;
499	<	property AutoCalcFields;
500	<
501	<	property AfterCancel;
502	<	property AfterClose;
503	<	property AfterDelete;
504	<	property AfterEdit;
505	<	property AfterInsert;
506	<	property AfterOpen;
507	<	property AfterPost;
508	<	property AfterRefresh;
509	<	property AfterScroll;
510	<	property BeforeCancel;
511	<	property BeforeClose;
512	<	property BeforeDelete;
513	<	property BeforeEdit;
514	<	property BeforeInsert;
515	<	property BeforeOpen;
516	<	property BeforePost;
517	<	property BeforeRefresh;
518	<	property BeforeScroll;
519	<	property OnCalcFields;
520	<	property OnDeleteError;
521	<	property OnEditError;
522	<	property OnNewRecord;
523	<	property OnPostError;
524	<	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
525	<	write FOnUpdateError;
526	<	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
527	<	write FOnUpdateRecord;
528	<	end;
529	<
530	<	TIBParserDataSet = class(TIBCustomDataSet)
531	<	public
532	<	property Parser;
533	<	end;
534	<
535	<	TIBDataSet = class(TIBParserDataSet)
536	<	private
537	<	function GetPrepared: Boolean;
538	<
539	<	protected
540	<	procedure SetFiltered(Value: Boolean); override;
541	<	procedure InternalOpen; override;
542	<
543	<	public
544	<	procedure Prepare;
545	<	procedure UnPrepare;
546	<	procedure BatchInput(InputObject: TIBBatchInput);
547	<	procedure BatchOutput(OutputObject: TIBBatchOutput);
548	<	procedure ExecSQL;
549	<
550	<	public
551	<	property Params;
552	<	property Prepared : Boolean read GetPrepared;
553	<	property QDelete;
554	<	property QInsert;
555	<	property QRefresh;
556	<	property QSelect;
557	<	property QModify;
558	<	property StatementType;
559	<	property SelectStmtHandle;
560	<	property BaseSQLSelect;
561	<
562	<	published
563	<	{ TIBCustomDataSet }
564	<	property BufferChunks;
565	<	property CachedUpdates;
566	<	property DeleteSQL;
567	<	property InsertSQL;
568	<	property RefreshSQL;
569	<	property SelectSQL;
570	<	property ModifySQL;
571	<	property GeneratorField;
572	<	property GenerateParamNames;
573	<	property ParamCheck;
574	<	property UniDirectional;
575	<	property Filtered;
576	<
577	<	property BeforeDatabaseDisconnect;
578	<	property AfterDatabaseDisconnect;
579	<	property DatabaseFree;
580	<	property BeforeTransactionEnd;
581	<	property AfterTransactionEnd;
582	<	property TransactionFree;
583	<
584	<	{ TIBDataSet }
585	<	property Active;
586	<	property AutoCalcFields;
587	<	property DataSource read GetDataSource write SetDataSource;
588	<
589	<	property AfterCancel;
590	<	property AfterClose;
591	<	property AfterDelete;
592	<	property AfterEdit;
593	<	property AfterInsert;
594	<	property AfterOpen;
595	<	property AfterPost;
596	<	property AfterScroll;
597	<	property BeforeCancel;
598	<	property BeforeClose;
599	<	property BeforeDelete;
600	<	property BeforeEdit;
601	<	property BeforeInsert;
602	<	property BeforeOpen;
603	<	property BeforePost;
604	<	property BeforeScroll;
605	<	property OnCalcFields;
606	<	property OnDeleteError;
607	<	property OnEditError;
608	<	property OnFilterRecord;
609	<	property OnNewRecord;
610	<	property OnPostError;
611	<	end;
612	<
613	<	{ TIBDSBlobStream }
614	<	TIBDSBlobStream = class(TStream)
615	<	protected
616	<	FField: TField;
617	<	FBlobStream: TIBBlobStream;
618	<	public
619	<	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
620	<	Mode: TBlobStreamMode);
621	<	function Read(var Buffer; Count: Longint): Longint; override;
622	<	function Seek(Offset: Longint; Origin: Word): Longint; override;
623	<	procedure SetSize(NewSize: Longint); override;
624	<	function Write(const Buffer; Count: Longint): Longint; override;
625	<	end;
626	<
627	<	const
628	<	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
629	<	nil,                { ftUnknown }
630	<	TIBStringField,     { ftString }
631	<	TSmallintField,     { ftSmallint }
632	<	TIntegerField,      { ftInteger }
633	<	TWordField,         { ftWord }
634	<	TBooleanField,      { ftBoolean }
635	<	TFloatField,        { ftFloat }
636	<	TCurrencyField,     { ftCurrency }
637	<	TIBBCDField,        { ftBCD }
638	<	TDateField,         { ftDate }
639	<	TTimeField,         { ftTime }
640	<	TDateTimeField,     { ftDateTime }
641	<	TBytesField,        { ftBytes }
642	<	TVarBytesField,     { ftVarBytes }
643	<	TAutoIncField,      { ftAutoInc }
644	<	TBlobField,         { ftBlob }
645	<	TMemoField,         { ftMemo }
646	<	TGraphicField,      { ftGraphic }
647	<	TBlobField,         { ftFmtMemo }
648	<	TBlobField,         { ftParadoxOle }
649	<	TBlobField,         { ftDBaseOle }
650	<	TBlobField,         { ftTypedBinary }
651	<	nil,                { ftCursor }
652	<	TStringField,       { ftFixedChar }
653	<	TWideStringField,    { ftWideString }
654	<	TLargeIntField,     { ftLargeInt }
655	<	nil,          { ftADT }
656	<	nil,        { ftArray }
657	<	nil,    { ftReference }
658	<	nil,     { ftDataSet }
659	<	TBlobField,         { ftOraBlob }
660	<	TMemoField,         { ftOraClob }
661	<	TVariantField,      { ftVariant }
662	<	nil,    { ftInterface }
663	<	nil,     { ftIDispatch }
664	<	TGuidField,        { ftGuid }
665	<	TDateTimeField,    {ftTimestamp}
666	<	TIBBCDField,       {ftFMTBcd}
667	<	nil,  {ftFixedWideChar}
668	<	TWideMemoField);   {ftWideMemo}
669	<	(*
670	<	TADTField,          { ftADT }
671	<	TArrayField,        { ftArray }
672	<	TReferenceField,    { ftReference }
673	<	TDataSetField,     { ftDataSet }
674	<	TBlobField,         { ftOraBlob }
675	<	TMemoField,         { ftOraClob }
676	<	TVariantField,      { ftVariant }
677	<	TInterfaceField,    { ftInterface }
678	<	TIDispatchField,     { ftIDispatch }
679	<	TGuidField);        { ftGuid } *)
680	<	(*var
681	<	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
682	<
683	<	implementation
684	<
685	<	uses IBIntf, Variants, FmtBCD;
686	<
687	<	const FILE_BEGIN = 0;
688	<	FILE_CURRENT = 1;
689	<	FILE_END = 2;
690	<
691	<	type
692	<
693	<	TFieldNode = class(TObject)
694	<	protected
695	<	FieldName : String;
696	<	COMPUTED_BLR : Boolean;
697	<	DEFAULT_VALUE : boolean;
698	<	NextField : TFieldNode;
699	<	end;
700	<
701	<	TRelationNode = class(TObject)
702	<	protected
703	<	RelationName : String;
704	<	FieldNodes : TFieldNode;
705	<	NextRelation : TRelationNode;
706	<	end;
707	<
708	<
709	<	{ TIBStringField}
710	<
711	<	constructor TIBStringField.Create(AOwner: TComponent);
712	<	begin
713	<	inherited Create(AOwner);
714	<	end;
715	<
716	<	class procedure TIBStringField.CheckTypeSize(Value: Integer);
717	<	begin
718	<	{ don't check string size. all sizes valid }
719	<	end;
720	<
721	<	function TIBStringField.GetAsString: string;
722	<	begin
723	<	if not GetValue(Result) then Result := '';
724	<	end;
725	<
726	<	function TIBStringField.GetAsVariant: Variant;
727	<	var
728	<	S: string;
729	<	begin
730	<	if GetValue(S) then Result := S else Result := Null;
731	<	end;
732	<
733	<	function TIBStringField.GetValue(var Value: string): Boolean;
734	<	var
735	<	Buffer: PChar;
736	<	begin
737	<	Buffer := nil;
738	<	IBAlloc(Buffer, 0, Size + 1);
739	<	try
740	<	Result := GetData(Buffer);
741	<	if Result then
742	<	begin
743	<	Value := string(Buffer);
744	<	if Transliterate and (Value <> '') then
745	<	DataSet.Translate(PChar(Value), PChar(Value), False);
746	<	end
747	<	finally
748	<	FreeMem(Buffer);
749	<	end;
750	<	end;
751	<
752	<	procedure TIBStringField.SetAsString(const Value: string);
753	<	var
754	<	Buffer: PChar;
755	<	begin
756	<	Buffer := nil;
757	<	IBAlloc(Buffer, 0, Size + 1);
758	<	try
759	<	StrLCopy(Buffer, PChar(Value), Size);
760	<	if Transliterate then
761	<	DataSet.Translate(Buffer, Buffer, True);
762	<	SetData(Buffer);
763	<	finally
764	<	FreeMem(Buffer);
765	<	end;
766	<	end;
767	<
768	<	{ TIBBCDField }
769	<
770	<	constructor TIBBCDField.Create(AOwner: TComponent);
771	<	begin
772	<	inherited Create(AOwner);
773	<	SetDataType(ftBCD);
774	<	Size := 8;
775	<	end;
776	<
777	<	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
778	<	begin
779	<	{ No need to check as the base type is currency, not BCD }
780	<	end;
781	<
782	<	function TIBBCDField.GetAsCurrency: Currency;
783	<	begin
784	<	if not GetValue(Result) then
785	<	Result := 0;
786	<	end;
787	<
788	<	function TIBBCDField.GetAsString: string;
789	<	var
790	<	C: System.Currency;
791	<	begin
792	<	if GetValue(C) then
793	<	Result := CurrToStr(C)
794	<	else
795	<	Result := '';
796	<	end;
797	<
798	<	function TIBBCDField.GetAsVariant: Variant;
799	<	var
800	<	C: System.Currency;
801	<	begin
802	<	if GetValue(C) then
803	<	Result := C
804	<	else
805	<	Result := Null;
806	<	end;
807	<
808	<	function TIBBCDField.GetDataSize: Integer;
809	<	begin
810	<	{$IFDEF TBCDFIELD_IS_BCD}
811	<	Result := 8;
812	<	{$ELSE}
813	<	Result := inherited GetDataSize
814	<	{$ENDIF}
815	<	end;
816	<
817	<	{ TIBDataLink }
818	<
819	<	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
820	<	begin
821	<	inherited Create;
822	<	FDataSet := ADataSet;
823	<	end;
824	<
825	<	destructor TIBDataLink.Destroy;
826	<	begin
827	<	FDataSet.FDataLink := nil;
828	<	inherited Destroy;
829	<	end;
830	<
831	<
832	<	procedure TIBDataLink.ActiveChanged;
833	<	begin
834	<	if FDataSet.Active then
835	<	FDataSet.RefreshParams;
836	<	end;
837	<
838	<
839	<	function TIBDataLink.GetDetailDataSet: TDataSet;
840	<	begin
841	<	Result := FDataSet;
842	<	end;
843	<
844	<	procedure TIBDataLink.RecordChanged(Field: TField);
845	<	begin
846	<	if (Field = nil) and FDataSet.Active then
847	<	FDataSet.RefreshParams;
848	<	end;
849	<
850	<	procedure TIBDataLink.CheckBrowseMode;
851	<	begin
852	<	if FDataSet.Active then
853	<	FDataSet.CheckBrowseMode;
854	<	end;
855	<
856	<	{ TIBCustomDataSet }
857	<
858	<	constructor TIBCustomDataSet.Create(AOwner: TComponent);
859	<	begin
860	<	inherited Create(AOwner);
861	<	FIBLoaded := False;
862	<	CheckIBLoaded;
863	<	FIBLoaded := True;
864	<	FBase := TIBBase.Create(Self);
865	<	FCurrentRecord := -1;
866	<	FDeletedRecords := 0;
867	<	FUniDirectional := False;
868	<	FBufferChunks := BufferCacheSize;
869	<	FBlobStreamList := TList.Create;
870	<	FGeneratorField := TIBGenerator.Create(self);
871	<	FDataLink := TIBDataLink.Create(Self);
872	<	FQDelete := TIBSQL.Create(Self);
873	<	FQDelete.OnSQLChanging := SQLChanging;
874	<	FQDelete.GoToFirstRecordOnExecute := False;
875	<	FQInsert := TIBSQL.Create(Self);
876	<	FQInsert.OnSQLChanging := SQLChanging;
877	<	FQInsert.GoToFirstRecordOnExecute := False;
878	<	FQRefresh := TIBSQL.Create(Self);
879	<	FQRefresh.OnSQLChanging := SQLChanging;
880	<	FQRefresh.GoToFirstRecordOnExecute := False;
881	<	FQSelect := TIBSQL.Create(Self);
882	<	FQSelect.OnSQLChanging := SQLChanging;
883	<	FQSelect.GoToFirstRecordOnExecute := False;
884	<	FQModify := TIBSQL.Create(Self);
885	<	FQModify.OnSQLChanging := SQLChanging;
886	<	FQModify.GoToFirstRecordOnExecute := False;
887	<	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
888	<	FParamCheck := True;
889	<	FGenerateParamNames := False;
890	<	FForcedRefresh := False;
891	<	{Bookmark Size is Integer for IBX}
892	<	BookmarkSize := SizeOf(Integer);
893	<	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
894	<	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
895	<	FBase.OnDatabaseFree := DoDatabaseFree;
896	<	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
897	<	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
898	<	FBase.OnTransactionFree := DoTransactionFree;
899	<	if AOwner is TIBDatabase then
900	<	Database := TIBDatabase(AOwner)
901	<	else
902	<	if AOwner is TIBTransaction then
903	<	Transaction := TIBTransaction(AOwner);
904	<	FBaseSQLSelect := TStringList.Create;
905	<	end;
906	<
907	<	destructor TIBCustomDataSet.Destroy;
908	<	begin
909	<	if Active then Active := false;
910	<	if FIBLoaded then
911	<	begin
912	<	if assigned(FGeneratorField) then FGeneratorField.Free;
913	<	FDataLink.Free;
914	<	FBase.Free;
915	<	ClearBlobCache;
916	<	FBlobStreamList.Free;
917	<	FreeMem(FBufferCache);
918	<	FBufferCache := nil;
919	<	FreeMem(FOldBufferCache);
920	<	FOldBufferCache := nil;
921	<	FCacheSize := 0;
922	<	FOldCacheSize := 0;
923	<	FMappedFieldPosition := nil;
924	<	end;
925	<	if assigned(FBaseSQLSelect) then FBaseSQLSelect.Free;
926	<	if assigned(FParser) then FParser.Free;
927	<	inherited Destroy;
928	<	end;
929	<
930	<	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
931	<	TGetResult;
932	<	begin
933	<	while not IsVisible(Buffer) do
934	<	begin
935	<	if GetMode = gmPrior then
936	<	begin
937	<	Dec(FCurrentRecord);
938	<	if FCurrentRecord = -1 then
939	<	begin
940	<	result := grBOF;
941	<	exit;
942	<	end;
943	<	ReadRecordCache(FCurrentRecord, Buffer, False);
944	<	end
945	<	else begin
946	<	Inc(FCurrentRecord);
947	<	if (FCurrentRecord = FRecordCount) then
948	<	begin
949	<	if (not FQSelect.EOF) and (FQSelect.Next <> nil) then
950	<	begin
951	<	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
952	<	Inc(FRecordCount);
953	<	end
954	<	else begin
955	<	result := grEOF;
956	<	exit;
957	<	end;
958	<	end
959	<	else
960	<	ReadRecordCache(FCurrentRecord, Buffer, False);
961	<	end;
962	<	end;
963	<	result := grOK;
964	<	end;
965	<
966	<	procedure TIBCustomDataSet.ApplyUpdates;
967	<	var
968	<	{$IF FPC_FULLVERSION >= 20700 }
969	<	CurBookmark: TBookmark;
970	<	{$ELSE}
971	<	CurBookmark: string;
972	<	{$ENDIF}
973	<	Buffer: PRecordData;
974	<	CurUpdateTypes: TIBUpdateRecordTypes;
975	<	UpdateAction: TIBUpdateAction;
976	<	UpdateKind: TUpdateKind;
977	<	bRecordsSkipped: Boolean;
978	<
979	<	procedure GetUpdateKind;
980	<	begin
981	<	case Buffer^.rdCachedUpdateStatus of
982	<	cusModified:
983	<	UpdateKind := ukModify;
984	<	cusInserted:
985	<	UpdateKind := ukInsert;
986	<	else
987	<	UpdateKind := ukDelete;
988	<	end;
989	<	end;
990	<
991	<	procedure ResetBufferUpdateStatus;
992	<	begin
993	<	case Buffer^.rdCachedUpdateStatus of
994	<	cusModified:
995	<	begin
996	<	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
997	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
998	<	end;
999	<	cusInserted:
1000	<	begin
1001	<	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1002	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1003	<	end;
1004	<	cusDeleted:
1005	<	begin
1006	<	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
1007	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1008	<	end;
1009	<	end;
1010	<	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
1011	<	end;
1012	<
1013	<	procedure UpdateUsingOnUpdateRecord;
1014	<	begin
1015	<	UpdateAction := uaFail;
1016	<	try
1017	<	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
1018	<	except
1019	<	on E: Exception do
1020	<	begin
1021	<	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1022	<	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1023	<	if UpdateAction = uaFail then
1024	<	raise;
1025	<	end;
1026	<	end;
1027	<	end;
1028	<
1029	<	procedure UpdateUsingUpdateObject;
1030	<	begin
1031	<	try
1032	<	FUpdateObject.Apply(UpdateKind,PChar(Buffer));
1033	<	ResetBufferUpdateStatus;
1034	<	except
1035	<	on E: Exception do
1036	<	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1037	<	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1038	<	end;
1039	<	end;
1040	<
1041	<	procedure UpdateUsingInternalquery;
1042	<	begin
1043	<	try
1044	<	case Buffer^.rdCachedUpdateStatus of
1045	<	cusModified:
1046	<	InternalPostRecord(FQModify, Buffer);
1047	<	cusInserted:
1048	<	InternalPostRecord(FQInsert, Buffer);
1049	<	cusDeleted:
1050	<	InternalDeleteRecord(FQDelete, Buffer);
1051	<	end;
1052	<	except
1053	<	on E: EIBError do begin
1054	<	UpdateAction := uaFail;
1055	<	if Assigned(FOnUpdateError) then
1056	<	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
1057	<	case UpdateAction of
1058	<	uaFail: raise;
1059	<	uaAbort: SysUtils.Abort;
1060	<	uaSkip: bRecordsSkipped := True;
1061	<	end;
1062	<	end;
1063	<	end;
1064	<	end;
1065	<
1066	<	begin
1067	<	if State in [dsEdit, dsInsert] then
1068	<	Post;
1069	<	FBase.CheckDatabase;
1070	<	FBase.CheckTransaction;
1071	<	DisableControls;
1072	<	CurBookmark := Bookmark;
1073	<	CurUpdateTypes := FUpdateRecordTypes;
1074	<	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1075	<	try
1076	<	First;
1077	<	bRecordsSkipped := False;
1078	<	while not EOF do
1079	<	begin
1080	<	Buffer := PRecordData(GetActiveBuf);
1081	<	GetUpdateKind;
1082	<	UpdateAction := uaApply;
1083	<	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
1084	<	begin
1085	<	if (Assigned(FOnUpdateRecord)) then
1086	<	UpdateUsingOnUpdateRecord
1087	<	else
1088	<	if Assigned(FUpdateObject) then
1089	<	UpdateUsingUpdateObject;
1090	<	case UpdateAction of
1091	<	uaFail:
1092	<	IBError(ibxeUserAbort, [nil]);
1093	<	uaAbort:
1094	<	SysUtils.Abort;
1095	<	uaApplied:
1096	<	ResetBufferUpdateStatus;
1097	<	uaSkip:
1098	<	bRecordsSkipped := True;
1099	<	uaRetry:
1100	<	Continue;
1101	<	end;
1102	<	end;
1103	<	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
1104	<	begin
1105	<	UpdateUsingInternalquery;
1106	<	UpdateAction := uaApplied;
1107	<	end;
1108	<	Next;
1109	<	end;
1110	<	FUpdatesPending := bRecordsSkipped;
1111	<	finally
1112	<	FUpdateRecordTypes := CurUpdateTypes;
1113	<	Bookmark := CurBookmark;
1114	<	EnableControls;
1115	<	end;
1116	<	end;
1117	<
1118	<	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1119	<	begin
1120	<	FQSelect.BatchInput(InputObject);
1121	<	end;
1122	<
1123	<	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1124	<	var
1125	<	Qry: TIBSQL;
1126	<	begin
1127	<	Qry := TIBSQL.Create(Self);
1128	<	try
1129	<	Qry.Database := FBase.Database;
1130	<	Qry.Transaction := FBase.Transaction;
1131	<	Qry.SQL.Assign(FQSelect.SQL);
1132	<	Qry.BatchOutput(OutputObject);
1133	<	finally
1134	<	Qry.Free;
1135	<	end;
1136	<	end;
1137	<
1138	<	procedure TIBCustomDataSet.CancelUpdates;
1139	<	var
1140	<	CurUpdateTypes: TIBUpdateRecordTypes;
1141	<	begin
1142	<	if State in [dsEdit, dsInsert] then
1143	<	Post;
1144	<	if FCachedUpdates and FUpdatesPending then
1145	<	begin
1146	<	DisableControls;
1147	<	CurUpdateTypes := UpdateRecordTypes;
1148	<	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1149	<	try
1150	<	First;
1151	<	while not EOF do
1152	<	begin
1153	<	if UpdateStatus = usInserted then
1154	<	RevertRecord
1155	<	else
1156	<	begin
1157	<	RevertRecord;
1158	<	Next;
1159	<	end;
1160	<	end;
1161	<	finally
1162	<	UpdateRecordTypes := CurUpdateTypes;
1163	<	First;
1164	<	FUpdatesPending := False;
1165	<	EnableControls;
1166	<	end;
1167	<	end;
1168	<	end;
1169	<
1170	<	function TIBCustomDataSet.GetFieldPosition(AliasName: string): integer;
1171	<	var i: integer;
1172	<	Prepared: boolean;
1173	<	begin
1174	<	Result := 0;
1175	<	Prepared := FInternalPrepared;
1176	<	if not Prepared then
1177	<	InternalPrepare;
1178	<	try
1179	<	for i := 0 to Length(FAliasNameList) - 1 do
1180	<	if FAliasNameList[i] = AliasName then
1181	<	begin
1182	<	Result := i + 1;
1183	<	Exit
1184	<	end;
1185	<	finally
1186	<	if not Prepared then
1187	<	InternalUnPrepare;
1188	<	end;
1189	<	end;
1190	<
1191	<	procedure TIBCustomDataSet.ActivateConnection;
1192	<	begin
1193	<	if not Assigned(Database) then
1194	<	IBError(ibxeDatabaseNotAssigned, [nil]);
1195	<	if not Assigned(Transaction) then
1196	<	IBError(ibxeTransactionNotAssigned, [nil]);
1197	<	if not Database.Connected then Database.Open;
1198	<	end;
1199	<
1200	<	function TIBCustomDataSet.ActivateTransaction: Boolean;
1201	<	begin
1202	<	Result := False;
1203	<	if not Assigned(Transaction) then
1204	<	IBError(ibxeTransactionNotAssigned, [nil]);
1205	<	if not Transaction.Active then
1206	<	begin
1207	<	Result := True;
1208	<	Transaction.StartTransaction;
1209	<	FDidActivate := True;
1210	<	end;
1211	<	end;
1212	<
1213	<	procedure TIBCustomDataSet.DeactivateTransaction;
1214	<	var
1215	<	i: Integer;
1216	<	begin
1217	<	if not Assigned(Transaction) then
1218	<	IBError(ibxeTransactionNotAssigned, [nil]);
1219	<	with Transaction do
1220	<	begin
1221	<	for i := 0 to SQLObjectCount - 1 do
1222	<	begin
1223	<	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1224	<	begin
1225	<	if TDataSet(SQLObjects[i].owner).Active then
1226	<	begin
1227	<	FDidActivate := False;
1228	<	exit;
1229	<	end;
1230	<	end;
1231	<	end;
1232	<	end;
1233	<	FInternalPrepared := False;
1234	<	if Transaction.InTransaction then
1235	<	Transaction.Commit;
1236	<	FDidActivate := False;
1237	<	end;
1238	<
1239	<	procedure TIBCustomDataSet.CheckDatasetClosed;
1240	<	begin
1241	<	if FOpen then
1242	<	IBError(ibxeDatasetOpen, [nil]);
1243	<	end;
1244	<
1245	<	procedure TIBCustomDataSet.CheckDatasetOpen;
1246	<	begin
1247	<	if not FOpen then
1248	<	IBError(ibxeDatasetClosed, [nil]);
1249	<	end;
1250	<
1251	<	function TIBCustomDataSet.CreateParser: TSelectSQLParser;
1252	<	begin
1253	<	Result := TSelectSQLParser.Create(self,FBaseSQLSelect);
1254	<	Result.OnSQLChanging := SQLChanging
1255	<	end;
1256	<
1257	<	procedure TIBCustomDataSet.CheckNotUniDirectional;
1258	<	begin
1259	<	if UniDirectional then
1260	<	IBError(ibxeDataSetUniDirectional, [nil]);
1261	<	end;
1262	<
1263	<	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1264	<	begin
1265	<	with PRecordData(Buffer)^ do
1266	<	if (State = dsInsert) and (not Modified) then
1267	<	begin
1268	<	rdRecordNumber := FRecordCount;
1269	<	FCurrentRecord := FRecordCount;
1270	<	end;
1271	<	end;
1272	<
1273	<	function TIBCustomDataSet.CanEdit: Boolean;
1274	<	var
1275	<	Buff: PRecordData;
1276	<	begin
1277	<	Buff := PRecordData(GetActiveBuf);
1278	<	result := (FQModify.SQL.Text <> '') or
1279	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1280	<	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1281	<	(FCachedUpdates));
1282	<	end;
1283	<
1284	<	function TIBCustomDataSet.CanInsert: Boolean;
1285	<	begin
1286	<	result := (FQInsert.SQL.Text <> '') or
1287	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1288	<	end;
1289	<
1290	<	function TIBCustomDataSet.CanDelete: Boolean;
1291	<	begin
1292	<	if (FQDelete.SQL.Text <> '') or
1293	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1294	<	result := True
1295	<	else
1296	<	result := False;
1297	<	end;
1298	<
1299	<	function TIBCustomDataSet.CanRefresh: Boolean;
1300	<	begin
1301	<	result := (FQRefresh.SQL.Text <> '') or
1302	<	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1303	<	end;
1304	<
1305	<	procedure TIBCustomDataSet.CheckEditState;
1306	<	begin
1307	<	case State of
1308	<	{ Check all the wsEditMode types }
1309	<	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1310	<	dsNewValue, dsInternalCalc :
1311	<	begin
1312	<	if (State in [dsEdit]) and (not CanEdit) then
1313	<	IBError(ibxeCannotUpdate, [nil]);
1314	<	if (State in [dsInsert]) and (not CanInsert) then
1315	<	IBError(ibxeCannotInsert, [nil]);
1316	<	end;
1317	<	else
1318	<	IBError(ibxeNotEditing, [])
1319	<	end;
1320	<	end;
1321	<
1322	<	procedure TIBCustomDataSet.ClearBlobCache;
1323	<	var
1324	<	i: Integer;
1325	<	begin
1326	<	for i := 0 to FBlobStreamList.Count - 1 do
1327	<	begin
1328	<	TIBBlobStream(FBlobStreamList[i]).Free;
1329	<	FBlobStreamList[i] := nil;
1330	<	end;
1331	<	FBlobStreamList.Pack;
1332	<	end;
1333	<
1334	<	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1335	<	begin
1336	<	Move(Source^, Dest^, FRecordBufferSize);
1337	<	end;
1338	<
1339	<	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1340	<	begin
1341	<	if Active then
1342	<	Active := False;
1343	<	FInternalPrepared := False;
1344	<	if Assigned(FBeforeDatabaseDisconnect) then
1345	<	FBeforeDatabaseDisconnect(Sender);
1346	<	end;
1347	<
1348	<	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1349	<	begin
1350	<	if Assigned(FAfterDatabaseDisconnect) then
1351	<	FAfterDatabaseDisconnect(Sender);
1352	<	end;
1353	<
1354	<	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1355	<	begin
1356	<	if Assigned(FDatabaseFree) then
1357	<	FDatabaseFree(Sender);
1358	<	end;
1359	<
1360	<	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject);
1361	<	begin
1362	<	if Active then
1363	<	Active := False;
1364	<	if FQSelect <> nil then
1365	<	FQSelect.FreeHandle;
1366	<	if FQDelete <> nil then
1367	<	FQDelete.FreeHandle;
1368	<	if FQInsert <> nil then
1369	<	FQInsert.FreeHandle;
1370	<	if FQModify <> nil then
1371	<	FQModify.FreeHandle;
1372	<	if FQRefresh <> nil then
1373	<	FQRefresh.FreeHandle;
1374	<	if Assigned(FBeforeTransactionEnd) then
1375	<	FBeforeTransactionEnd(Sender);
1376	<	end;
1377	<
1378	<	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1379	<	begin
1380	<	if Assigned(FAfterTransactionEnd) then
1381	<	FAfterTransactionEnd(Sender);
1382	<	end;
1383	<
1384	<	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1385	<	begin
1386	<	if Assigned(FTransactionFree) then
1387	<	FTransactionFree(Sender);
1388	<	end;
1389	<
1390	<	{ Read the record from FQSelect.Current into the record buffer
1391	<	Then write the buffer to in memory cache }
1392	<	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
1393	<	RecordNumber: Integer; Buffer: PChar);
1394	<	var
1395	<	p: PRecordData;
1396	<	pbd: PBlobDataArray;
1397	<	i, j: Integer;
1398	<	LocalData: Pointer;
1399	<	LocalDate, LocalDouble: Double;
1400	<	LocalInt: Integer;
1401	<	LocalInt64: Int64;
1402	<	LocalCurrency: Currency;
1403	<	FieldsLoaded: Integer;
1404	<	temp: TIBXSQLVAR;
1405	<	begin
1406	<	p := PRecordData(Buffer);
1407	<	{ Make sure blob cache is empty }
1408	<	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
1409	<	if RecordNumber > -1 then
1410	<	for i := 0 to BlobFieldCount - 1 do
1411	<	pbd^[i] := nil;
1412	<	{ Get record information }
1413	<	p^.rdBookmarkFlag := bfCurrent;
1414	<	p^.rdFieldCount := Qry.Current.Count;
1415	<	p^.rdRecordNumber := RecordNumber;
1416	<	p^.rdUpdateStatus := usUnmodified;
1417	<	p^.rdCachedUpdateStatus := cusUnmodified;
1418	<	p^.rdSavedOffset := $FFFFFFFF;
1419	<
1420	<	{ Load up the fields }
1421	<	FieldsLoaded := FQSelect.Current.Count;
1422	<	j := 1;
1423	<	for i := 0 to Qry.Current.Count - 1 do
1424	<	begin
1425	<	if (Qry = FQSelect) then
1426	<	j := i + 1
1427	<	else begin
1428	<	if FieldsLoaded = 0 then
1429	<	break;
1430	<	j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1;
1431	<	if j < 1 then
1432	<	continue
1433	<	else
1434	<	Dec(FieldsLoaded);
1435	<	end;
1436	<	with FQSelect.Current[j - 1].Data^ do
1437	<	if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
1438	<	begin
1439	<	if sqllen <= 8 then
1440	<	p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^;
1441	<	continue;
1442	<	end;
1443	<	if j > 0 then with p^ do
1444	<	begin
1445	<	rdFields[j].fdDataType :=
1446	<	Qry.Current[i].Data^.sqltype and (not 1);
1447	<	rdFields[j].fdDataScale :=
1448	<	Qry.Current[i].Data^.sqlscale;
1449	<	rdFields[j].fdNullable :=
1450	<	(Qry.Current[i].Data^.sqltype and 1 = 1);
1451	<	rdFields[j].fdIsNull :=
1452	<	(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1));
1453	<	LocalData := Qry.Current[i].Data^.sqldata;
1454	<	case rdFields[j].fdDataType of
1455	<	SQL_TIMESTAMP:
1456	<	begin
1457	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1458	<	if RecordNumber >= 0 then
1459	<	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime));
1460	<	LocalData := PChar(@LocalDate);
1461	<	end;
1462	<	SQL_TYPE_DATE:
1463	<	begin
1464	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1465	<	if RecordNumber >= 0 then
1466	<	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date;
1467	<	LocalData := PChar(@LocalInt);
1468	<	end;
1469	<	SQL_TYPE_TIME:
1470	<	begin
1471	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1472	<	if RecordNumber >= 0 then
1473	<	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time;
1474	<	LocalData := PChar(@LocalInt);
1475	<	end;
1476	<	SQL_SHORT, SQL_LONG:
1477	<	begin
1478	<	if (rdFields[j].fdDataScale = 0) then
1479	<	begin
1480	<	rdFields[j].fdDataSize := SizeOf(Integer);
1481	<	if RecordNumber >= 0 then
1482	<	LocalInt := Qry.Current[i].AsLong;
1483	<	LocalData := PChar(@LocalInt);
1484	<	end
1485	<	else if (rdFields[j].fdDataScale >= (-4)) then
1486	<	begin
1487	<	rdFields[j].fdDataSize := SizeOf(Currency);
1488	<	if RecordNumber >= 0 then
1489	<	LocalCurrency := Qry.Current[i].AsCurrency;
1490	<	LocalData := PChar(@LocalCurrency);
1491	<	end
1492	<	else begin
1493	<	rdFields[j].fdDataSize := SizeOf(Double);
1494	<	if RecordNumber >= 0 then
1495	<	LocalDouble := Qry.Current[i].AsDouble;
1496	<	LocalData := PChar(@LocalDouble);
1497	<	end;
1498	<	end;
1499	<	SQL_INT64:
1500	<	begin
1501	<	if (rdFields[j].fdDataScale = 0) then
1502	<	begin
1503	<	rdFields[j].fdDataSize := SizeOf(Int64);
1504	<	if RecordNumber >= 0 then
1505	<	LocalInt64 := Qry.Current[i].AsInt64;
1506	<	LocalData := PChar(@LocalInt64);
1507	<	end
1508	<	else if (rdFields[j].fdDataScale >= (-4)) then
1509	<	begin
1510	<	rdFields[j].fdDataSize := SizeOf(Currency);
1511	<	if RecordNumber >= 0 then
1512	<	LocalCurrency := Qry.Current[i].AsCurrency;
1513	<	LocalData := PChar(@LocalCurrency);
1514	<	end
1515	<	else begin
1516	<	rdFields[j].fdDataSize := SizeOf(Double);
1517	<	if RecordNumber >= 0 then
1518	<	LocalDouble := Qry.Current[i].AsDouble;
1519	<	LocalData := PChar(@LocalDouble);
1520	<	end
1521	<	end;
1522	<	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
1523	<	begin
1524	<	rdFields[j].fdDataSize := SizeOf(Double);
1525	<	if RecordNumber >= 0 then
1526	<	LocalDouble := Qry.Current[i].AsDouble;
1527	<	LocalData := PChar(@LocalDouble);
1528	<	end;
1529	<	SQL_VARYING:
1530	<	begin
1531	<	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1532	<	rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2);
1533	<	if RecordNumber >= 0 then
1534	<	begin
1535	<	if (rdFields[j].fdDataLength = 0) then
1536	<	LocalData := nil
1537	<	else
1538	<	begin
1539	<	temp :=  Qry.Current[i];
1540	<	LocalData := @temp.Data^.sqldata[2];
1541	<	(*              LocalData := @Qry.Current[i].Data^.sqldata[2];*)
1542	<	end;
1543	<	end;
1544	<	end;
1545	<	else { SQL_TEXT, SQL_BLOB, SQL_ARRAY, SQL_QUAD }
1546	<	begin
1547	<	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1548	<	if (rdFields[j].fdDataType = SQL_TEXT) then
1549	<	rdFields[j].fdDataLength := rdFields[j].fdDataSize;
1550	<	end;
1551	<	end;
1552	<	if RecordNumber < 0 then
1553	<	begin
1554	<	rdFields[j].fdIsNull := True;
1555	<	rdFields[j].fdDataOfs := FRecordSize;
1556	<	Inc(FRecordSize, rdFields[j].fdDataSize);
1557	<	end
1558	<	else begin
1559	<	if rdFields[j].fdDataType = SQL_VARYING then
1560	<	begin
1561	<	if LocalData <> nil then
1562	<	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength)
1563	<	end
1564	<	else
1565	<	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize)
1566	<	end;
1567	<	end;
1568	<	end;
1569	<	WriteRecordCache(RecordNumber, PChar(p));
1570	<	end;
1571	<
1572	<	function TIBCustomDataSet.GetActiveBuf: PChar;
1573	<	begin
1574	<	case State of
1575	<	dsBrowse:
1576	<	if IsEmpty then
1577	<	result := nil
1578	<	else
1579	<	result := ActiveBuffer;
1580	<	dsEdit, dsInsert:
1581	<	result := ActiveBuffer;
1582	<	dsCalcFields:
1583	<	result := CalcBuffer;
1584	<	dsFilter:
1585	<	result := FFilterBuffer;
1586	<	dsNewValue:
1587	<	result := ActiveBuffer;
1588	<	dsOldValue:
1589	<	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
1590	<	PRecordData(FOldBuffer)^.rdRecordNumber) then
1591	<	result := FOldBuffer
1592	<	else
1593	<	result := ActiveBuffer;
1594	<	else if not FOpen then
1595	<	result := nil
1596	<	else
1597	<	result := ActiveBuffer;
1598	<	end;
1599	<	end;
1600	<
1601	<	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
1602	<	begin
1603	<	if Active then
1604	<	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
1605	<	else
1606	<	result := cusUnmodified;
1607	<	end;
1608	<
1609	<	function TIBCustomDataSet.GetDatabase: TIBDatabase;
1610	<	begin
1611	<	result := FBase.Database;
1612	<	end;
1613	<
1614	<	function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE;
1615	<	begin
1616	<	result := FBase.DBHandle;
1617	<	end;
1618	<
1619	<	function TIBCustomDataSet.GetDeleteSQL: TStrings;
1620	<	begin
1621	<	result := FQDelete.SQL;
1622	<	end;
1623	<
1624	<	function TIBCustomDataSet.GetInsertSQL: TStrings;
1625	<	begin
1626	<	result := FQInsert.SQL;
1627	<	end;
1628	<
1629	<	function TIBCustomDataSet.GetSQLParams: TIBXSQLDA;
1630	<	begin
1631	<	if not FInternalPrepared then
1632	<	InternalPrepare;
1633	<	result := FQSelect.Params;
1634	<	end;
1635	<
1636	<	function TIBCustomDataSet.GetRefreshSQL: TStrings;
1637	<	begin
1638	<	result := FQRefresh.SQL;
1639	<	end;
1640	<
1641	<	function TIBCustomDataSet.GetSelectSQL: TStrings;
1642	<	begin
1643	<	result := FQSelect.SQL;
1644	<	end;
1645	<
1646	<	function TIBCustomDataSet.GetStatementType: TIBSQLTypes;
1647	<	begin
1648	<	result := FQSelect.SQLType;
1649	<	end;
1650	<
1651	<	function TIBCustomDataSet.GetModifySQL: TStrings;
1652	<	begin
1653	<	result := FQModify.SQL;
1654	<	end;
1655	<
1656	<	function TIBCustomDataSet.GetTransaction: TIBTransaction;
1657	<	begin
1658	<	result := FBase.Transaction;
1659	<	end;
1660	<
1661	<	function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE;
1662	<	begin
1663	<	result := FBase.TRHandle;
1664	<	end;
1665	<
1666	<	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
1667	<	begin
1668	<	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1669	<	FUpdateObject.Apply(ukDelete,Buff)
1670	<	else
1671	<	begin
1672	<	SetInternalSQLParams(FQDelete, Buff);
1673	<	FQDelete.ExecQuery;
1674	<	end;
1675	<	with PRecordData(Buff)^ do
1676	<	begin
1677	<	rdUpdateStatus := usDeleted;
1678	<	rdCachedUpdateStatus := cusUnmodified;
1679	<	end;
1680	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1681	<	end;
1682	<
1683	<	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
1684	<	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1685	<	var
1686	<	keyFieldList: TList;
1687	<	{$IF FPC_FULLVERSION >= 20700 }
1688	<	CurBookmark: TBookmark;
1689	<	{$ELSE}
1690	<	CurBookmark: string;
1691	<	{$ENDIF}
1692	<	fieldValue: Variant;
1693	<	lookupValues: array of variant;
1694	<	i, fieldCount: Integer;
1695	<	fieldValueAsString: string;
1696	<	lookupValueAsString: string;
1697	<	begin
1698	<	keyFieldList := TList.Create;
1699	<	try
1700	<	GetFieldList(keyFieldList, KeyFields);
1701	<	fieldCount := keyFieldList.Count;
1702	<	CurBookmark := Bookmark;
1703	<	result := false;
1704	<	SetLength(lookupValues, fieldCount);
1705	<	if not EOF then
1706	<	begin
1707	<	for i := 0 to fieldCount - 1 do  {expand key values into lookupValues array}
1708	<	begin
1709	<	if VarIsArray(KeyValues) then
1710	<	lookupValues[i] := KeyValues[i]
1711	<	else
1712	<	if i > 0 then
1713	<	lookupValues[i] := NULL
1714	<	else
1715	<	lookupValues[0] := KeyValues;
1716	<
1717	<	{convert to upper case is case insensitive search}
1718	<	if (TField(keyFieldList[i]).DataType = ftString) and
1719	<	not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
1720	<	lookupValues[i] := UpperCase(lookupValues[i]);
1721	<	end;
1722	<	end;
1723	<	while not result and not EOF do   {search for a matching record}
1724	<	begin
1725	<	i := 0;
1726	<	result := true;
1727	<	while result and (i < fieldCount) do
1728	<	{see if all of the key fields matches}
1729	<	begin
1730	<	fieldValue := TField(keyFieldList[i]).Value;
1731	<	result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
1732	<	if result and not VarIsNull(fieldValue) then
1733	<	begin
1734	<	try
1735	<	if TField(keyFieldList[i]).DataType = ftString then
1736	<	begin
1737	<	{strings need special handling because of the locate options that
1738	<	apply to them}
1739	<	fieldValueAsString := TField(keyFieldList[i]).AsString;
1740	<	lookupValueAsString := lookupValues[i];
1741	<	if (loCaseInsensitive in Options) then
1742	<	fieldValueAsString := UpperCase(fieldValueAsString);
1743	<
1744	<	if (loPartialKey in Options) then
1745	<	result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
1746	<	else
1747	<	result := result and (fieldValueAsString = lookupValueAsString);
1748	<	end
1749	<	else
1750	<	result := result and (lookupValues[i] =
1751	<	VarAsType(fieldValue, VarType(lookupValues[i])));
1752	<	except on EVariantError do
1753	<	result := False;
1754	<	end;
1755	<	end;
1756	<	Inc(i);
1757	<	end;
1758	<	if not result then
1759	<	Next;
1760	<	end;
1761	<	if not result then
1762	<	Bookmark := CurBookmark
1763	<	else
1764	<	CursorPosChanged;
1765	<	finally
1766	<	keyFieldList.Free;
1767	<	SetLength(lookupValues,0)
1768	<	end;
1769	<	end;
1770	<
1771	<	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
1772	<	var
1773	<	i, j, k: Integer;
1774	<	pbd: PBlobDataArray;
1775	<	begin
1776	<	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
1777	<	j := 0;
1778	<	for i := 0 to FieldCount - 1 do
1779	<	if Fields[i].IsBlob then
1780	<	begin
1781	<	k := FMappedFieldPosition[Fields[i].FieldNo -1];
1782	<	if pbd^[j] <> nil then
1783	<	begin
1784	<	pbd^[j].Finalize;
1785	<	PISC_QUAD(
1786	<	PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ :=
1787	<	pbd^[j].BlobID;
1788	<	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
1789	<	end;
1790	<	Inc(j);
1791	<	end;
1792	<	if Assigned(FUpdateObject) then
1793	<	begin
1794	<	if (Qry = FQDelete) then
1795	<	FUpdateObject.Apply(ukDelete,Buff)
1796	<	else if (Qry = FQInsert) then
1797	<	FUpdateObject.Apply(ukInsert,Buff)
1798	<	else
1799	<	FUpdateObject.Apply(ukModify,Buff);
1800	<	end
1801	<	else begin
1802	<	SetInternalSQLParams(Qry, Buff);
1803	<	Qry.ExecQuery;
1804	<	end;
1805	<	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
1806	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
1807	<	SetModified(False);
1808	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1809	<	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
1810	<	InternalRefreshRow;
1811	<	end;
1812	<
1813	<	procedure TIBCustomDataSet.InternalRefreshRow;
1814	<	var
1815	<	Buff: PChar;
1816	<	SetCursor: Boolean;
1817	<	ofs: DWORD;
1818	<	Qry: TIBSQL;
1819	<	begin
1820	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1821	<	if SetCursor then
1822	<	Screen.Cursor := crHourGlass;
1823	<	try
1824	<	Buff := GetActiveBuf;
1825	<	if CanRefresh then
1826	<	begin
1827	<	if Buff <> nil then
1828	<	begin
1829	<	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
1830	<	begin
1831	<	Qry := TIBSQL.Create(self);
1832	<	Qry.Database := Database;
1833	<	Qry.Transaction := Transaction;
1834	<	Qry.GoToFirstRecordOnExecute := False;
1835	<	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
1836	<	end
1837	<	else
1838	<	Qry := FQRefresh;
1839	<	SetInternalSQLParams(Qry, Buff);
1840	<	Qry.ExecQuery;
1841	<	try
1842	<	if (Qry.SQLType = SQLExecProcedure) or
1843	<	(Qry.Next <> nil) then
1844	<	begin
1845	<	ofs := PRecordData(Buff)^.rdSavedOffset;
1846	<	FetchCurrentRecordToBuffer(Qry,
1847	<	PRecordData(Buff)^.rdRecordNumber,
1848	<	Buff);
1849	<	if FCachedUpdates and (ofs <> $FFFFFFFF) then
1850	<	begin
1851	<	PRecordData(Buff)^.rdSavedOffset := ofs;
1852	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1853	<	SaveOldBuffer(Buff);
1854	<	end;
1855	<	end;
1856	<	finally
1857	<	Qry.Close;
1858	<	end;
1859	<	if Qry <> FQRefresh then
1860	<	Qry.Free;
1861	<	end
1862	<	end
1863	<	else
1864	<	IBError(ibxeCannotRefresh, [nil]);
1865	<	finally
1866	<	if SetCursor and (Screen.Cursor = crHourGlass) then
1867	<	Screen.Cursor := crDefault;
1868	<	end;
1869	<	end;
1870	<
1871	<	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
1872	<	var
1873	<	NewBuffer, OldBuffer: PRecordData;
1874	<
1875	<	begin
1876	<	NewBuffer := nil;
1877	<	OldBuffer := nil;
1878	<	NewBuffer := PRecordData(AllocRecordBuffer);
1879	<	OldBuffer := PRecordData(AllocRecordBuffer);
1880	<	try
1881	<	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
1882	<	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
1883	<	case NewBuffer^.rdCachedUpdateStatus of
1884	<	cusInserted:
1885	<	begin
1886	<	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
1887	<	Inc(FDeletedRecords);
1888	<	end;
1889	<	cusModified,
1890	<	cusDeleted:
1891	<	begin
1892	<	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
1893	<	Dec(FDeletedRecords);
1894	<	CopyRecordBuffer(OldBuffer, NewBuffer);
1895	<	end;
1896	<	end;
1897	<
1898	<	if State in dsEditModes then
1899	<	Cancel;
1900	<
1901	<	WriteRecordCache(RecordNumber, PChar(NewBuffer));
1902	<
1903	<	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
1904	<	ReSync([]);
1905	<	finally
1906	<	FreeRecordBuffer(PChar(NewBuffer));
1907	<	FreeRecordBuffer(PChar(OldBuffer));
1908	<	end;
1909	<	end;
1910	<
1911	<	{ A visible record is one that is not truly deleted,
1912	<	and it is also listed in the FUpdateRecordTypes set }
1913	<
1914	<	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
1915	<	begin
1916	<	result := True;
1917	<	if not (State = dsOldValue) then
1918	<	result :=
1919	<	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
1920	<	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
1921	<	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
1922	<	end;
1923	<
1924	<
1925	<	function TIBCustomDataSet.LocateNext(const KeyFields: string;
1926	<	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1927	<	begin
1928	<	DisableControls;
1929	<	try
1930	<	result := InternalLocate(KeyFields, KeyValues, Options);
1931	<	finally
1932	<	EnableControls;
1933	<	end;
1934	<	end;
1935	<
1936	<	procedure TIBCustomDataSet.InternalPrepare;
1937	<	var
1938	<	SetCursor: Boolean;
1939	<	DidActivate: Boolean;
1940	<	begin
1941	<	if FInternalPrepared then
1942	<	Exit;
1943	<	DidActivate := False;
1944	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1945	<	if SetCursor then
1946	<	Screen.Cursor := crHourGlass;
1947	<	try
1948	<	ActivateConnection;
1949	<	DidActivate := ActivateTransaction;
1950	<	FBase.CheckDatabase;
1951	<	FBase.CheckTransaction;
1952	<	if HasParser and (FParser.SQLText <> FQSelect.SQL.Text) then
1953	<	FQSelect.SQL.Text := FParser.SQLText;
1954	<	//   writeln( FQSelect.SQL.Text);
1955	<	if FQSelect.SQL.Text <> '' then
1956	<	begin
1957	<	if not FQSelect.Prepared then
1958	<	begin
1959	<	FQSelect.GenerateParamNames := FGenerateParamNames;
1960	<	FQSelect.ParamCheck := ParamCheck;
1961	<	FQSelect.Prepare;
1962	<	end;
1963	<	FQDelete.GenerateParamNames := FGenerateParamNames;
1964	<	if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
1965	<	FQDelete.Prepare;
1966	<	FQInsert.GenerateParamNames := FGenerateParamNames;
1967	<	if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
1968	<	FQInsert.Prepare;
1969	<	FQRefresh.GenerateParamNames := FGenerateParamNames;
1970	<	if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
1971	<	FQRefresh.Prepare;
1972	<	FQModify.GenerateParamNames := FGenerateParamNames;
1973	<	if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
1974	<	FQModify.Prepare;
1975	<	FInternalPrepared := True;
1976	<	InternalInitFieldDefs;
1977	<	end else
1978	<	IBError(ibxeEmptyQuery, [nil]);
1979	<	finally
1980	<	if DidActivate then
1981	<	DeactivateTransaction;
1982	<	if SetCursor and (Screen.Cursor = crHourGlass) then
1983	<	Screen.Cursor := crDefault;
1984	<	end;
1985	<	end;
1986	<
1987	<	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
1988	<	begin
1989	<	SetModified(Value);
1990	<	end;
1991	<
1992	<	procedure TIBCustomDataSet.RevertRecord;
1993	<	var
1994	<	Buff: PRecordData;
1995	<	begin
1996	<	if FCachedUpdates and FUpdatesPending then
1997	<	begin
1998	<	Buff := PRecordData(GetActiveBuf);
1999	<	InternalRevertRecord(Buff^.rdRecordNumber);
2000	<	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
2001	<	DataEvent(deRecordChange, 0);
2002	<	end;
2003	<	end;
2004	<
2005	<	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
2006	<	var
2007	<	OldBuffer: Pointer;
2008	<	procedure CopyOldBuffer;
2009	<	begin
2010	<	CopyRecordBuffer(Buffer, OldBuffer);
2011	<	if BlobFieldCount > 0 then
2012	<	FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream),
2013	<	0);
2014	<	end;
2015	<
2016	<	begin
2017	<	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
2018	<	begin
2019	<	OldBuffer := AllocRecordBuffer;
2020	<	try
2021	<	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
2022	<	begin
2023	<	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
2024	<	FILE_END);
2025	<	CopyOldBuffer;
2026	<	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
2027	<	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
2028	<	FILE_BEGIN, Buffer);
2029	<	end
2030	<	else begin
2031	<	CopyOldBuffer;
2032	<	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2033	<	OldBuffer);
2034	<	end;
2035	<	finally
2036	<	FreeRecordBuffer(PChar(OldBuffer));
2037	<	end;
2038	<	end;
2039	<	end;
2040	<
2041	<	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
2042	<	begin
2043	<	if (Value <= 0) then
2044	<	FBufferChunks := BufferCacheSize
2045	<	else
2046	<	FBufferChunks := Value;
2047	<	end;
2048	<
2049	<	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
2050	<	begin
2051	<	if (FBase.Database <> Value) then
2052	<	begin
2053	<	CheckDatasetClosed;
2054	<	FBase.Database := Value;
2055	<	FQDelete.Database := Value;
2056	<	FQInsert.Database := Value;
2057	<	FQRefresh.Database := Value;
2058	<	FQSelect.Database := Value;
2059	<	FQModify.Database := Value;
2060	<	end;
2061	<	end;
2062	<
2063	<	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
2064	<	begin
2065	<	if FQDelete.SQL.Text <> Value.Text then
2066	<	begin
2067	<	Disconnect;
2068	<	FQDelete.SQL.Assign(Value);
2069	<	end;
2070	<	end;
2071	<
2072	<	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
2073	<	begin
2074	<	if FQInsert.SQL.Text <> Value.Text then
2075	<	begin
2076	<	Disconnect;
2077	<	FQInsert.SQL.Assign(Value);
2078	<	end;
2079	<	end;
2080	<
2081	<	procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
2082	<	var
2083	<	i, j: Integer;
2084	<	cr, data: PChar;
2085	<	fn, st: string;
2086	<	OldBuffer: Pointer;
2087	<	ts: TTimeStamp;
2088	<	begin
2089	<	if (Buffer = nil) then
2090	<	IBError(ibxeBufferNotSet, [nil]);
2091	<	if (not FInternalPrepared) then
2092	<	InternalPrepare;
2093	<	OldBuffer := nil;
2094	<	try
2095	<	for i := 0 to Qry.Params.Count - 1 do
2096	<	begin
2097	<	fn := Qry.Params[i].Name;
2098	<	if (Pos('OLD_', fn) = 1) then {mbcs ok}
2099	<	begin
2100	<	fn := Copy(fn, 5, Length(fn));
2101	<	if not Assigned(OldBuffer) then
2102	<	begin
2103	<	OldBuffer := AllocRecordBuffer;
2104	<	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
2105	<	end;
2106	<	cr := OldBuffer;
2107	<	end
2108	<	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
2109	<	begin
2110	<	fn := Copy(fn, 5, Length(fn));
2111	<	cr := Buffer;
2112	<	end
2113	<	else
2114	<	cr := Buffer;
2115	<	j := FQSelect.FieldIndex[fn] + 1;
2116	<	if (j > 0) then
2117	<	with PRecordData(cr)^ do
2118	<	begin
2119	<	if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize}
2120	<	begin
2121	<	PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey;
2122	<	continue;
2123	<	end;
2124	<	if rdFields[j].fdIsNull then
2125	<	Qry.Params[i].IsNull := True
2126	<	else begin
2127	<	Qry.Params[i].IsNull := False;
2128	<	data := cr + rdFields[j].fdDataOfs;
2129	<	case rdFields[j].fdDataType of
2130	<	SQL_TEXT, SQL_VARYING:
2131	<	begin
2132	<	SetString(st, data, rdFields[j].fdDataLength);
2133	<	Qry.Params[i].AsString := st;
2134	<	end;
2135	<	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
2136	<	Qry.Params[i].AsDouble := PDouble(data)^;
2137	<	SQL_SHORT, SQL_LONG:
2138	<	begin
2139	<	if rdFields[j].fdDataScale = 0 then
2140	<	Qry.Params[i].AsLong := PLong(data)^
2141	<	else if rdFields[j].fdDataScale >= (-4) then
2142	<	Qry.Params[i].AsCurrency := PCurrency(data)^
2143	<	else
2144	<	Qry.Params[i].AsDouble := PDouble(data)^;
2145	<	end;
2146	<	SQL_INT64:
2147	<	begin
2148	<	if rdFields[j].fdDataScale = 0 then
2149	<	Qry.Params[i].AsInt64 := PInt64(data)^
2150	<	else if rdFields[j].fdDataScale >= (-4) then
2151	<	Qry.Params[i].AsCurrency := PCurrency(data)^
2152	<	else
2153	<	Qry.Params[i].AsDouble := PDouble(data)^;
2154	<	end;
2155	<	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
2156	<	Qry.Params[i].AsQuad := PISC_QUAD(data)^;
2157	<	SQL_TYPE_DATE:
2158	<	begin
2159	<	ts.Date := PInt(data)^;
2160	<	ts.Time := 0;
2161	<	Qry.Params[i].AsDate :=
2162	<	TimeStampToDateTime(ts);
2163	<	end;
2164	<	SQL_TYPE_TIME:
2165	<	begin
2166	<	ts.Date := 0;
2167	<	ts.Time := PInt(data)^;
2168	<	Qry.Params[i].AsTime :=
2169	<	TimeStampToDateTime(ts);
2170	<	end;
2171	<	SQL_TIMESTAMP:
2172	<	Qry.Params[i].AsDateTime :=
2173	<	TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^)));
2174	<	end;
2175	<	end;
2176	<	end;
2177	<	end;
2178	<	finally
2179	<	if (OldBuffer <> nil) then
2180	<	FreeRecordBuffer(PChar(OldBuffer));
2181	<	end;
2182	<	end;
2183	<
2184	<	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2185	<	begin
2186	<	if FQRefresh.SQL.Text <> Value.Text then
2187	<	begin
2188	<	Disconnect;
2189	<	FQRefresh.SQL.Assign(Value);
2190	<	end;
2191	<	end;
2192	<
2193	<	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2194	<	begin
2195	<	if FQSelect.SQL.Text <> Value.Text then
2196	<	begin
2197	<	Disconnect;
2198	<	FQSelect.SQL.Assign(Value);
2199	<	FBaseSQLSelect.assign(Value);
2200	<	end;
2201	<	end;
2202	<
2203	<	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2204	<	begin
2205	<	if FQModify.SQL.Text <> Value.Text then
2206	<	begin
2207	<	Disconnect;
2208	<	FQModify.SQL.Assign(Value);
2209	<	end;
2210	<	end;
2211	<
2212	<	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2213	<	begin
2214	<	if (FBase.Transaction <> Value) then
2215	<	begin
2216	<	CheckDatasetClosed;
2217	<	FBase.Transaction := Value;
2218	<	FQDelete.Transaction := Value;
2219	<	FQInsert.Transaction := Value;
2220	<	FQRefresh.Transaction := Value;
2221	<	FQSelect.Transaction := Value;
2222	<	FQModify.Transaction := Value;
2223	<	end;
2224	<	end;
2225	<
2226	<	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2227	<	begin
2228	<	CheckDatasetClosed;
2229	<	FUniDirectional := Value;
2230	<	end;
2231	<
2232	<	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2233	<	begin
2234	<	FUpdateRecordTypes := Value;
2235	<	if Active then
2236	<	First;
2237	<	end;
2238	<
2239	<	procedure TIBCustomDataSet.RefreshParams;
2240	<	var
2241	<	DataSet: TDataSet;
2242	<	begin
2243	<	DisableControls;
2244	<	try
2245	<	if FDataLink.DataSource <> nil then
2246	<	begin
2247	<	DataSet := FDataLink.DataSource.DataSet;
2248	<	if DataSet <> nil then
2249	<	if DataSet.Active and (DataSet.State <> dsSetKey) then
2250	<	begin
2251	<	Close;
2252	<	Open;
2253	<	end;
2254	<	end;
2255	<	finally
2256	<	EnableControls;
2257	<	end;
2258	<	end;
2259	<
2260	<
2261	<	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2262	<	begin
2263	<	Active := false;
2264	<	{  if FOpen then
2265	<	InternalClose;}
2266	<	if FInternalPrepared then
2267	<	InternalUnPrepare;
2268	<	FieldDefs.Clear;
2269	<	FieldDefs.Updated := false;
2270	<	end;
2271	<
2272	<	{ I can "undelete" uninserted records (make them "inserted" again).
2273	<	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2274	<	procedure TIBCustomDataSet.Undelete;
2275	<	var
2276	<	Buff: PRecordData;
2277	<	begin
2278	<	CheckActive;
2279	<	Buff := PRecordData(GetActiveBuf);
2280	<	with Buff^ do
2281	<	begin
2282	<	if rdCachedUpdateStatus = cusUninserted then
2283	<	begin
2284	<	rdCachedUpdateStatus := cusInserted;
2285	<	Dec(FDeletedRecords);
2286	<	end
2287	<	else if (rdUpdateStatus = usDeleted) and
2288	<	(rdCachedUpdateStatus = cusDeleted) then
2289	<	begin
2290	<	rdCachedUpdateStatus := cusUnmodified;
2291	<	rdUpdateStatus := usUnmodified;
2292	<	Dec(FDeletedRecords);
2293	<	end;
2294	<	WriteRecordCache(rdRecordNumber, PChar(Buff));
2295	<	end;
2296	<	end;
2297	<
2298	<	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2299	<	begin
2300	<	if Active then
2301	<	if GetActiveBuf <> nil then
2302	<	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2303	<	else
2304	<	result := usUnmodified
2305	<	else
2306	<	result := usUnmodified;
2307	<	end;
2308	<
2309	<	function TIBCustomDataSet.IsSequenced: Boolean;
2310	<	begin
2311	<	Result := Assigned( FQSelect ) and FQSelect.EOF;
2312	<	end;
2313	<
2314	<	function TIBCustomDataSet.ParamByName(ParamName: String): TIBXSQLVAR;
2315	<	begin
2316	<	ActivateConnection;
2317	<	ActivateTransaction;
2318	<	if not FInternalPrepared then
2319	<	InternalPrepare;
2320	<	Result := Params.ByName(ParamName);
2321	<	end;
2322	<
2323	<	{Beware: the parameter FCache is used as an identifier to determine which
2324	<	cache is being operated on and is not referenced in the computation.
2325	<	The result is an adjusted offset into the identified cache, either the
2326	<	Buffer Cache or the old Buffer Cache.}
2327	<
2328	<	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
2329	<	Origin: Integer): DWORD;
2330	<	var
2331	<	OldCacheSize: Integer;
2332	<	begin
2333	<	if (FCache = FBufferCache) then
2334	<	begin
2335	<	case Origin of
2336	<	FILE_BEGIN:    FBPos := Offset;
2337	<	FILE_CURRENT:  FBPos := FBPos + Offset;
2338	<	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
2339	<	end;
2340	<	OldCacheSize := FCacheSize;
2341	<	while (FBPos >= DWORD(FCacheSize)) do
2342	<	Inc(FCacheSize, FBufferChunkSize);
2343	<	if FCacheSize > OldCacheSize then
2344	<	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
2345	<	result := FBPos;
2346	<	end
2347	<	else begin
2348	<	case Origin of
2349	<	FILE_BEGIN:    FOBPos := Offset;
2350	<	FILE_CURRENT:  FOBPos := FOBPos + Offset;
2351	<	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
2352	<	end;
2353	<	OldCacheSize := FOldCacheSize;
2354	<	while (FBPos >= DWORD(FOldCacheSize)) do
2355	<	Inc(FOldCacheSize, FBufferChunkSize);
2356	<	if FOldCacheSize > OldCacheSize then
2357	<	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
2358	<	result := FOBPos;
2359	<	end;
2360	<	end;
2361	<
2362	<	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2363	<	Buffer: PChar);
2364	<	var
2365	<	pCache: PChar;
2366	<	AdjustedOffset: DWORD;
2367	<	bOld: Boolean;
2368	<	begin
2369	<	bOld := (FCache = FOldBufferCache);
2370	<	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2371	<	if not bOld then
2372	<	pCache := FBufferCache + AdjustedOffset
2373	<	else
2374	<	pCache := FOldBufferCache + AdjustedOffset;
2375	<	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
2376	<	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2377	<	end;
2378	<
2379	<	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
2380	<	ReadOldBuffer: Boolean);
2381	<	begin
2382	<	if FUniDirectional then
2383	<	RecordNumber := RecordNumber mod UniCache;
2384	<	if (ReadOldBuffer) then
2385	<	begin
2386	<	ReadRecordCache(RecordNumber, Buffer, False);
2387	<	if FCachedUpdates and
2388	<	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
2389	<	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2390	<	Buffer)
2391	<	else
2392	<	if ReadOldBuffer and
2393	<	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
2394	<	CopyRecordBuffer( FOldBuffer, Buffer )
2395	<	end
2396	<	else
2397	<	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2398	<	end;
2399	<
2400	<	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2401	<	Buffer: PChar);
2402	<	var
2403	<	pCache: PChar;
2404	<	AdjustedOffset: DWORD;
2405	<	bOld: Boolean;
2406	<	dwEnd: DWORD;
2407	<	begin
2408	<	bOld := (FCache = FOldBufferCache);
2409	<	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2410	<	if not bOld then
2411	<	pCache := FBufferCache + AdjustedOffset
2412	<	else
2413	<	pCache := FOldBufferCache + AdjustedOffset;
2414	<	Move(Buffer^, pCache^, FRecordBufferSize);
2415	<	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2416	<	if not bOld then
2417	<	begin
2418	<	if (dwEnd > FBEnd) then
2419	<	FBEnd := dwEnd;
2420	<	end
2421	<	else begin
2422	<	if (dwEnd > FOBEnd) then
2423	<	FOBEnd := dwEnd;
2424	<	end;
2425	<	end;
2426	<
2427	<	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
2428	<	begin
2429	<	if RecordNumber >= 0 then
2430	<	begin
2431	<	if FUniDirectional then
2432	<	RecordNumber := RecordNumber mod UniCache;
2433	<	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2434	<	end;
2435	<	end;
2436	<
2437	<	function TIBCustomDataSet.AllocRecordBuffer: PChar;
2438	<	begin
2439	<	result := nil;
2440	<	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
2441	<	Move(FModelBuffer^, result^, FRecordBufferSize);
2442	<	end;
2443	<
2444	<	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
2445	<	var
2446	<	pb: PBlobDataArray;
2447	<	fs: TIBBlobStream;
2448	<	Buff: PChar;
2449	<	bTr, bDB: Boolean;
2450	<	begin
2451	<	Buff := GetActiveBuf;
2452	<	if Buff = nil then
2453	<	begin
2454	<	fs := TIBBlobStream.Create;
2455	<	fs.Mode := bmReadWrite;
2456	<	FBlobStreamList.Add(Pointer(fs));
2457	<	result := TIBDSBlobStream.Create(Field, fs, Mode);
2458	<	exit;
2459	<	end;
2460	<	pb := PBlobDataArray(Buff + FBlobCacheOffset);
2461	<	if pb^[Field.Offset] = nil then
2462	<	begin
2463	<	AdjustRecordOnInsert(Buff);
2464	<	pb^[Field.Offset] := TIBBlobStream.Create;
2465	<	fs := pb^[Field.Offset];
2466	<	FBlobStreamList.Add(Pointer(fs));
2467	<	fs.Mode := bmReadWrite;
2468	<	fs.Database := Database;
2469	<	fs.Transaction := Transaction;
2470	<	fs.BlobID :=
2471	<	PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
2472	<	if (CachedUpdates) then
2473	<	begin
2474	<	bTr := not Transaction.InTransaction;
2475	<	bDB := not Database.Connected;
2476	<	if bDB then
2477	<	Database.Open;
2478	<	if bTr then
2479	<	Transaction.StartTransaction;
2480	<	fs.Seek(0, soFromBeginning);
2481	<	if bTr then
2482	<	Transaction.Commit;
2483	<	if bDB then
2484	<	Database.Close;
2485	<	end;
2486	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
2487	<	end else
2488	<	fs := pb^[Field.Offset];
2489	<	result := TIBDSBlobStream.Create(Field, fs, Mode);
2490	<	end;
2491	<
2492	<	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
2493	<	const
2494	<	CMPLess = -1;
2495	<	CMPEql  =  0;
2496	<	CMPGtr  =  1;
2497	<	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
2498	<	(CMPGtr, CMPEql));
2499	<	begin
2500	<	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
2501	<
2502	<	if Result = 2 then
2503	<	begin
2504	<	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
2505	<	Result := CMPLess
2506	<	else
2507	<	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
2508	<	Result := CMPGtr
2509	<	else
2510	<	Result := CMPEql;
2511	<	end;
2512	<	end;
2513	<
2514	<	procedure TIBCustomDataSet.DoBeforeDelete;
2515	<	var
2516	<	Buff: PRecordData;
2517	<	begin
2518	<	if not CanDelete then
2519	<	IBError(ibxeCannotDelete, [nil]);
2520	<	Buff := PRecordData(GetActiveBuf);
2521	<	if FCachedUpdates and
2522	<	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
2523	<	SaveOldBuffer(PChar(Buff));
2524	<	inherited DoBeforeDelete;
2525	<	end;
2526	<
2527	<	procedure TIBCustomDataSet.DoBeforeEdit;
2528	<	var
2529	<	Buff: PRecordData;
2530	<	begin
2531	<	Buff := PRecordData(GetActiveBuf);
2532	<	if not(CanEdit or (FQModify.SQL.Count <> 0) or
2533	<	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
2534	<	IBError(ibxeCannotUpdate, [nil]);
2535	<	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
2536	<	SaveOldBuffer(PChar(Buff));
2537	<	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
2538	<	inherited DoBeforeEdit;
2539	<	end;
2540	<
2541	<	procedure TIBCustomDataSet.DoBeforeInsert;
2542	<	begin
2543	<	if not CanInsert then
2544	<	IBError(ibxeCannotInsert, [nil]);
2545	<	inherited DoBeforeInsert;
2546	<	end;
2547	<
2548	<	procedure TIBCustomDataSet.DoAfterInsert;
2549	<	begin
2550	<	if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
2551	<	GeneratorField.Apply;
2552	<	inherited DoAfterInsert;
2553	<	end;
2554	<
2555	<	procedure TIBCustomDataSet.DoBeforeOpen;
2556	<	begin
2557	<	if assigned(FParser) then
2558	<	FParser.Reset;
2559	<	DataEvent(deCheckBrowseMode,1); {Conventional use to report getting ready to prepare}
2560	<	inherited DoBeforeOpen;
2561	<	DataEvent(deCheckBrowseMode,2); {Conventional use to report the right time to set parameters}
2562	<	end;
2563	<
2564	<	procedure TIBCustomDataSet.DoBeforePost;
2565	<	begin
2566	<	inherited DoBeforePost;
2567	<	if (State = dsInsert) and
2568	<	(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
2569	<	GeneratorField.Apply
2570	<	end;
2571	<
2572	<	procedure TIBCustomDataSet.FetchAll;
2573	<	var
2574	<	SetCursor: Boolean;
2575	<	{$IF FPC_FULLVERSION >= 20700 }
2576	<	CurBookmark: TBookmark;
2577	<	{$ELSE}
2578	<	CurBookmark: string;
2579	<	{$ENDIF}
2580	<	begin
2581	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2582	<	if SetCursor then
2583	<	Screen.Cursor := crHourGlass;
2584	<	try
2585	<	if FQSelect.EOF or not FQSelect.Open then
2586	<	exit;
2587	<	DisableControls;
2588	<	try
2589	<	CurBookmark := Bookmark;
2590	<	Last;
2591	<	Bookmark := CurBookmark;
2592	<	finally
2593	<	EnableControls;
2594	<	end;
2595	<	finally
2596	<	if SetCursor and (Screen.Cursor = crHourGlass) then
2597	<	Screen.Cursor := crDefault;
2598	<	end;
2599	<	end;
2600	<
2601	<	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
2602	<	begin
2603	<	FreeMem(Buffer);
2604	<	Buffer := nil;
2605	<	end;
2606	<
2607	<	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
2608	<	begin
2609	<	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
2610	<	end;
2611	<
2612	<	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
2613	<	begin
2614	<	result := PRecordData(Buffer)^.rdBookmarkFlag;
2615	<	end;
2616	<
2617	<	function TIBCustomDataSet.GetCanModify: Boolean;
2618	<	begin
2619	<	result := (FQInsert.SQL.Text <> '') or
2620	<	(FQModify.SQL.Text <> '') or
2621	<	(FQDelete.SQL.Text <> '') or
2622	<	(Assigned(FUpdateObject));
2623	<	end;
2624	<
2625	<	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
2626	<	begin
2627	<	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
2628	<	begin
2629	<	UpdateCursorPos;
2630	<	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
2631	<	result := True;
2632	<	end
2633	<	else
2634	<	result := False;
2635	<	end;
2636	<
2637	<	function TIBCustomDataSet.GetDataSource: TDataSource;
2638	<	begin
2639	<	if FDataLink = nil then
2640	<	result := nil
2641	<	else
2642	<	result := FDataLink.DataSource;
2643	<	end;
2644	<
2645	<	function TIBCustomDataSet.GetDBAliasName(FieldNo: integer): string;
2646	<	begin
2647	<	Result := FAliasNameMap[FieldNo-1]
2648	<	end;
2649	<
2650	<	function TIBCustomDataSet.GetFieldDefFromAlias(aliasName: string): TFieldDef;
2651	<	var
2652	<	i: integer;
2653	<	begin
2654	<	Result := nil;
2655	<	for i := 0 to Length(FAliasNameMap) - 1 do
2656	<	if FAliasNameMap[i] = aliasName then
2657	<	begin
2658	<	Result := FieldDefs[i+1];
2659	<	Exit
2660	<	end;
2661	<	end;
2662	<
2663	<	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
2664	<	begin
2665	<	Result := DefaultFieldClasses[FieldType];
2666	<	end;
2667	<
2668	<	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
2669	<	begin
2670	<	result := GetFieldData(FieldByNumber(FieldNo), buffer);
2671	<	end;
2672	<
2673	<	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
2674	<	var
2675	<	Buff, Data: PChar;
2676	<	CurrentRecord: PRecordData;
2677	<	begin
2678	<	result := False;
2679	<	Buff := GetActiveBuf;
2680	<	if (Buff = nil) or
2681	<	(not IsVisible(Buff)) or not assigned(Field.DataSet) then
2682	<	exit;
2683	<	{ The intention here is to stuff the buffer with the data for the
2684	<	referenced field for the current record }
2685	<	CurrentRecord := PRecordData(Buff);
2686	<	if (Field.FieldNo < 0) then
2687	<	begin
2688	<	Inc(Buff, FRecordSize + Field.Offset);
2689	<	result := Boolean(Buff[0]);
2690	<	if result and (Buffer <> nil) then
2691	<	Move(Buff[1], Buffer^, Field.DataSize);
2692	<	end
2693	<	else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
2694	<	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
2695	<	begin
2696	<	result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull;
2697	<	if result and (Buffer <> nil) then
2698	<	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do
2699	<	begin
2700	<	Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs;
2701	<	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
2702	<	begin
2703	<	if fdDataLength <= Field.Size then
2704	<	begin
2705	<	Move(Data^, Buffer^, fdDataLength);
2706	<	PChar(Buffer)[fdDataLength] := #0;
2707	<	end
2708	<	else
2709	<	IBError(ibxeFieldSizeError,[Field.FieldName])
2710	<	end
2711	<	else
2712	<	Move(Data^, Buffer^, Field.DataSize);
2713	<	end;
2714	<	end;
2715	<	end;
2716	<
2717	<	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
2718	<	opposed to 0-based indexes.
2719	<	This is because we want LastRecordNumber/RecordCount = 1 }
2720	<
2721	<	function TIBCustomDataSet.GetRecNo: Integer;
2722	<	begin
2723	<	if GetActiveBuf = nil then
2724	<	result := 0
2725	<	else
2726	<	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
2727	<	end;
2728	<
2729	<	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
2730	<	DoCheck: Boolean): TGetResult;
2731	<	var
2732	<	Accept: Boolean;
2733	<	SaveState: TDataSetState;
2734	<	begin
2735	<	Result := grOK;
2736	<	if Filtered and Assigned(OnFilterRecord) then
2737	<	begin
2738	<	Accept := False;
2739	<	SaveState := SetTempState(dsFilter);
2740	<	while not Accept do
2741	<	begin
2742	<	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2743	<	if Result <> grOK then
2744	<	break;
2745	<	FFilterBuffer := Buffer;
2746	<	try
2747	<	Accept := True;
2748	<	OnFilterRecord(Self, Accept);
2749	<	if not Accept and (GetMode = gmCurrent) then
2750	<	GetMode := gmPrior;
2751	<	except
2752	<	//        Application.HandleException(Self);
2753	<	end;
2754	<	end;
2755	<	RestoreState(SaveState);
2756	<	end
2757	<	else
2758	<	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2759	<	end;
2760	<
2761	<	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
2762	<	DoCheck: Boolean): TGetResult;
2763	<	begin
2764	<	result := grError;
2765	<	case GetMode of
2766	<	gmCurrent: begin
2767	<	if (FCurrentRecord >= 0) then begin
2768	<	if FCurrentRecord < FRecordCount then
2769	<	ReadRecordCache(FCurrentRecord, Buffer, False)
2770	<	else begin
2771	<	while (not FQSelect.EOF) and
2772	<	(FQSelect.Next <> nil) and
2773	<	(FCurrentRecord >= FRecordCount) do begin
2774	<	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
2775	<	Inc(FRecordCount);
2776	<	end;
2777	<	FCurrentRecord := FRecordCount - 1;
2778	<	if (FCurrentRecord >= 0) then
2779	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2780	<	end;
2781	<	result := grOk;
2782	<	end else
2783	<	result := grBOF;
2784	<	end;
2785	<	gmNext: begin
2786	<	result := grOk;
2787	<	if FCurrentRecord = FRecordCount then
2788	<	result := grEOF
2789	<	else if FCurrentRecord = FRecordCount - 1 then begin
2790	<	if (not FQSelect.EOF) then begin
2791	<	FQSelect.Next;
2792	<	Inc(FCurrentRecord);
2793	<	end;
2794	<	if (FQSelect.EOF) then begin
2795	<	result := grEOF;
2796	<	end else begin
2797	<	Inc(FRecordCount);
2798	<	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
2799	<	end;
2800	<	end else if (FCurrentRecord < FRecordCount) then begin
2801	<	Inc(FCurrentRecord);
2802	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2803	<	end;
2804	<	end;
2805	<	else { gmPrior }
2806	<	begin
2807	<	if (FCurrentRecord = 0) then begin
2808	<	Dec(FCurrentRecord);
2809	<	result := grBOF;
2810	<	end else if (FCurrentRecord > 0) and
2811	<	(FCurrentRecord <= FRecordCount) then begin
2812	<	Dec(FCurrentRecord);
2813	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2814	<	result := grOk;
2815	<	end else if (FCurrentRecord = -1) then
2816	<	result := grBOF;
2817	<	end;
2818	<	end;
2819	<	if result = grOk then
2820	<	result := AdjustCurrentRecord(Buffer, GetMode);
2821	<	if result = grOk then with PRecordData(Buffer)^ do begin
2822	<	rdBookmarkFlag := bfCurrent;
2823	<	GetCalcFields(Buffer);
2824	<	end else if (result = grEOF) then begin
2825	<	CopyRecordBuffer(FModelBuffer, Buffer);
2826	<	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2827	<	end else if (result = grBOF) then begin
2828	<	CopyRecordBuffer(FModelBuffer, Buffer);
2829	<	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
2830	<	end else if (result = grError) then begin
2831	<	CopyRecordBuffer(FModelBuffer, Buffer);
2832	<	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2833	<	end;;
2834	<	end;
2835	<
2836	<	function TIBCustomDataSet.GetRecordCount: Integer;
2837	<	begin
2838	<	result := FRecordCount - FDeletedRecords;
2839	<	end;
2840	<
2841	<	function TIBCustomDataSet.GetRecordSize: Word;
2842	<	begin
2843	<	result := FRecordBufferSize;
2844	<	end;
2845	<
2846	<	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
2847	<	begin
2848	<	CheckEditState;
2849	<	begin
2850	<	{ When adding records, we *always* append.
2851	<	Insertion is just too costly }
2852	<	AdjustRecordOnInsert(Buffer);
2853	<	with PRecordData(Buffer)^ do
2854	<	begin
2855	<	rdUpdateStatus := usInserted;
2856	<	rdCachedUpdateStatus := cusInserted;
2857	<	end;
2858	<	if not CachedUpdates then
2859	<	InternalPostRecord(FQInsert, Buffer)
2860	<	else begin
2861	<	WriteRecordCache(FCurrentRecord, Buffer);
2862	<	FUpdatesPending := True;
2863	<	end;
2864	<	Inc(FRecordCount);
2865	<	InternalSetToRecord(Buffer);
2866	<	end
2867	<	end;
2868	<
2869	<	procedure TIBCustomDataSet.InternalCancel;
2870	<	var
2871	<	Buff: PChar;
2872	<	CurRec: Integer;
2873	<	begin
2874	<	inherited InternalCancel;
2875	<	Buff := GetActiveBuf;
2876	<	if Buff <> nil then begin
2877	<	CurRec := FCurrentRecord;
2878	<	AdjustRecordOnInsert(Buff);
2879	<	if (State = dsEdit) then begin
2880	<	CopyRecordBuffer(FOldBuffer, Buff);
2881	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2882	<	end else begin
2883	<	CopyRecordBuffer(FModelBuffer, Buff);
2884	<	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
2885	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2886	<	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
2887	<	FCurrentRecord := CurRec;
2888	<	end;
2889	<	end;
2890	<	end;
2891	<
2892	<
2893	<	procedure TIBCustomDataSet.InternalClose;
2894	<	begin
2895	<	if FDidActivate then
2896	<	DeactivateTransaction;
2897	<	FQSelect.Close;
2898	<	ClearBlobCache;
2899	<	FreeRecordBuffer(FModelBuffer);
2900	<	FreeRecordBuffer(FOldBuffer);
2901	<	FCurrentRecord := -1;
2902	<	FOpen := False;
2903	<	FRecordCount := 0;
2904	<	FDeletedRecords := 0;
2905	<	FRecordSize := 0;
2906	<	FBPos := 0;
2907	<	FOBPos := 0;
2908	<	FCacheSize := 0;
2909	<	FOldCacheSize := 0;
2910	<	FBEnd := 0;
2911	<	FOBEnd := 0;
2912	<	FreeMem(FBufferCache);
2913	<	FBufferCache := nil;
2914	<	FreeMem(FOldBufferCache);
2915	<	FOldBufferCache := nil;
2916	<	BindFields(False);
2917	<	if DefaultFields then DestroyFields;
2918	<	end;
2919	<
2920	<	procedure TIBCustomDataSet.InternalDelete;
2921	<	var
2922	<	Buff: PChar;
2923	<	SetCursor: Boolean;
2924	<	begin
2925	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2926	<	if SetCursor then
2927	<	Screen.Cursor := crHourGlass;
2928	<	try
2929	<	Buff := GetActiveBuf;
2930	<	if CanDelete then
2931	<	begin
2932	<	if not CachedUpdates then
2933	<	InternalDeleteRecord(FQDelete, Buff)
2934	<	else
2935	<	begin
2936	<	with PRecordData(Buff)^ do
2937	<	begin
2938	<	if rdCachedUpdateStatus = cusInserted then
2939	<	rdCachedUpdateStatus := cusUninserted
2940	<	else begin
2941	<	rdUpdateStatus := usDeleted;
2942	<	rdCachedUpdateStatus := cusDeleted;
2943	<	end;
2944	<	end;
2945	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2946	<	end;
2947	<	Inc(FDeletedRecords);
2948	<	FUpdatesPending := True;
2949	<	end else
2950	<	IBError(ibxeCannotDelete, [nil]);
2951	<	finally
2952	<	if SetCursor and (Screen.Cursor = crHourGlass) then
2953	<	Screen.Cursor := crDefault;
2954	<	end;
2955	<	end;
2956	<
2957	<	procedure TIBCustomDataSet.InternalFirst;
2958	<	begin
2959	<	FCurrentRecord := -1;
2960	<	end;
2961	<
2962	<	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
2963	<	begin
2964	<	FCurrentRecord := PInteger(Bookmark)^;
2965	<	end;
2966	<
2967	<	procedure TIBCustomDataSet.InternalHandleException;
2968	<	begin
2969	<	Application.HandleException(Self)
2970	<	end;
2971	<
2972	<	procedure TIBCustomDataSet.InternalInitFieldDefs;
2973	<	begin
2974	<	if not InternalPrepared then
2975	<	begin
2976	<	InternalPrepare;
2977	<	exit;
2978	<	end;
2979	<	FieldDefsFromQuery(FQSelect);
2980	<	end;
2981	<
2982	<	procedure TIBCustomDataSet.FieldDefsFromQuery(SourceQuery: TIBSQL);
2983	<	const
2984	<	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
2985	<	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
2986	<	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
2987	<	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
2988	<	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
2989	<	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
2990	<	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
2991	<	var
2992	<	FieldType: TFieldType;
2993	<	FieldSize: Word;
2994	<	FieldNullable : Boolean;
2995	<	i, FieldPosition, FieldPrecision: Integer;
2996	<	FieldAliasName, DBAliasName: string;
2997	<	RelationName, FieldName: string;
2998	<	Query : TIBSQL;
2999	<	FieldIndex: Integer;
3000	<	FRelationNodes : TRelationNode;
3001	<
3002	<	function Add_Node(Relation, Field : String) : TRelationNode;
3003	<	var
3004	<	FField : TFieldNode;
3005	<	begin
3006	<	if FRelationNodes.RelationName = '' then
3007	<	Result := FRelationNodes
3008	<	else
3009	<	begin
3010	<	Result := TRelationNode.Create;
3011	<	Result.NextRelation := FRelationNodes;
3012	<	end;
3013	<	Result.RelationName := Relation;
3014	<	FRelationNodes := Result;
3015	<	Query.Params[0].AsString := Relation;
3016	<	Query.ExecQuery;
3017	<	while not Query.Eof do
3018	<	begin
3019	<	FField := TFieldNode.Create;
3020	<	FField.FieldName := Query.Fields[2].AsString;
3021	<	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
3022	<	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
3023	<	FField.NextField := Result.FieldNodes;
3024	<	Result.FieldNodes := FField;
3025	<	Query.Next;
3026	<	end;
3027	<	Query.Close;
3028	<	end;
3029	<
3030	<	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
3031	<	var
3032	<	FRelation : TRelationNode;
3033	<	FField : TFieldNode;
3034	<	begin
3035	<	FRelation := FRelationNodes;
3036	<	while Assigned(FRelation) and
3037	<	(FRelation.RelationName <> Relation) do
3038	<	FRelation := FRelation.NextRelation;
3039	<	if not Assigned(FRelation) then
3040	<	FRelation := Add_Node(Relation, Field);
3041	<	Result := false;
3042	<	FField := FRelation.FieldNodes;
3043	<	while Assigned(FField) do
3044	<	if FField.FieldName = Field then
3045	<	begin
3046	<	Result := Ffield.COMPUTED_BLR;
3047	<	Exit;
3048	<	end
3049	<	else
3050	<	FField := Ffield.NextField;
3051	<	end;
3052	<
3053	<	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
3054	<	var
3055	<	FRelation : TRelationNode;
3056	<	FField : TFieldNode;
3057	<	begin
3058	<	FRelation := FRelationNodes;
3059	<	while Assigned(FRelation) and
3060	<	(FRelation.RelationName <> Relation) do
3061	<	FRelation := FRelation.NextRelation;
3062	<	if not Assigned(FRelation) then
3063	<	FRelation := Add_Node(Relation, Field);
3064	<	Result := false;
3065	<	FField := FRelation.FieldNodes;
3066	<	while Assigned(FField) do
3067	<	if FField.FieldName = Field then
3068	<	begin
3069	<	Result := Ffield.DEFAULT_VALUE;
3070	<	Exit;
3071	<	end
3072	<	else
3073	<	FField := Ffield.NextField;
3074	<	end;
3075	<
3076	<	Procedure FreeNodes;
3077	<	var
3078	<	FRelation : TRelationNode;
3079	<	FField : TFieldNode;
3080	<	begin
3081	<	while Assigned(FRelationNodes) do
3082	<	begin
3083	<	While Assigned(FRelationNodes.FieldNodes) do
3084	<	begin
3085	<	FField := FRelationNodes.FieldNodes.NextField;
3086	<	FRelationNodes.FieldNodes.Free;
3087	<	FRelationNodes.FieldNodes := FField;
3088	<	end;
3089	<	FRelation := FRelationNodes.NextRelation;
3090	<	FRelationNodes.Free;
3091	<	FRelationNodes := FRelation;
3092	<	end;
3093	<	end;
3094	<
3095	<	begin
3096	<	FRelationNodes := TRelationNode.Create;
3097	<	FNeedsRefresh := False;
3098	<	Database.InternalTransaction.StartTransaction;
3099	<	Query := TIBSQL.Create(self);
3100	<	try
3101	<	Query.Database := DataBase;
3102	<	Query.Transaction := Database.InternalTransaction;
3103	<	FieldDefs.BeginUpdate;
3104	<	FieldDefs.Clear;
3105	<	FieldIndex := 0;
3106	<	if (Length(FMappedFieldPosition) < SourceQuery.Current.Count) then
3107	<	SetLength(FMappedFieldPosition, SourceQuery.Current.Count);
3108	<	Query.SQL.Text := DefaultSQL;
3109	<	Query.Prepare;
3110	<	SetLength(FAliasNameMap, SourceQuery.Current.Count);
3111	<	SetLength(FAliasNameList, SourceQuery.Current.Count);
3112	<	for i := 0 to SourceQuery.Current.Count - 1 do
3113	<	with SourceQuery.Current[i].Data^ do
3114	<	begin
3115	<	{ Get the field name }
3116	<	FieldAliasName := SourceQuery.Current[i].Name;
3117	<	SetString(DBAliasName, aliasname, aliasname_length);
3118	<	SetString(RelationName, relname, relname_length);
3119	<	SetString(FieldName, sqlname, sqlname_length);
3120	<	FAliasNameList[i] := DBAliasName;
3121	<	FieldSize := 0;
3122	<	FieldPrecision := 0;
3123	<	FieldNullable := SourceQuery.Current[i].IsNullable;
3124	<	case sqltype and not 1 of
3125	<	{ All VARCHAR's must be converted to strings before recording
3126	<	their values }
3127	<	SQL_VARYING, SQL_TEXT:
3128	<	begin
3129	<	FieldSize := sqllen;
3130	<	FieldType := ftString;
3131	<	end;
3132	<	{ All Doubles/Floats should be cast to doubles }
3133	<	SQL_DOUBLE, SQL_FLOAT:
3134	<	FieldType := ftFloat;
3135	<	SQL_SHORT:
3136	<	begin
3137	<	if (sqlscale = 0) then
3138	<	FieldType := ftSmallInt
3139	<	else begin
3140	<	FieldType := ftBCD;
3141	<	FieldPrecision := 4;
3142	<	FieldSize := -sqlscale;
3143	<	end;
3144	<	end;
3145	<	SQL_LONG:
3146	<	begin
3147	<	if (sqlscale = 0) then
3148	<	FieldType := ftInteger
3149	<	else if (sqlscale >= (-4)) then
3150	<	begin
3151	<	FieldType := ftBCD;
3152	<	FieldPrecision := 9;
3153	<	FieldSize := -sqlscale;
3154	<	end
3155	<	else
3156	<	if Database.SQLDialect = 1 then
3157	<	FieldType := ftFloat
3158	<	else
3159	<	if (FieldCount > i) and (Fields[i] is TFloatField) then
3160	<	FieldType := ftFloat
3161	<	else
3162	<	begin
3163	<	FieldType := ftFMTBCD;
3164	<	FieldPrecision := 9;
3165	<	FieldSize := -sqlscale;
3166	<	end;
3167	<	end;
3168	<
3169	<	SQL_INT64:
3170	<	begin
3171	<	if (sqlscale = 0) then
3172	<	FieldType := ftLargeInt
3173	<	else if (sqlscale >= (-4)) then
3174	<	begin
3175	<	FieldType := ftBCD;
3176	<	FieldPrecision := 18;
3177	<	FieldSize := -sqlscale;
3178	<	end
3179	<	else
3180	<	FieldType := ftFloat
3181	<	end;
3182	<	SQL_TIMESTAMP: FieldType := ftDateTime;
3183	<	SQL_TYPE_TIME: FieldType := ftTime;
3184	<	SQL_TYPE_DATE: FieldType := ftDate;
3185	<	SQL_BLOB:
3186	<	begin
3187	<	FieldSize := sizeof (TISC_QUAD);
3188	<	if (sqlsubtype = 1) then
3189	<	FieldType := ftmemo
3190	<	else
3191	<	FieldType := ftBlob;
3192	<	end;
3193	<	SQL_ARRAY:
3194	<	begin
3195	<	FieldSize := sizeof (TISC_QUAD);
3196	<	FieldType := ftUnknown;
3197	<	end;
3198	<	else
3199	<	FieldType := ftUnknown;
3200	<	end;
3201	<	FieldPosition := i + 1;
3202	<	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
3203	<	begin
3204	<	FMappedFieldPosition[FieldIndex] := FieldPosition;
3205	<	Inc(FieldIndex);
3206	<	with FieldDefs.AddFieldDef do
3207	<	begin
3208	<	Name := FieldAliasName;
3209	<	FAliasNameMap[FieldNo-1] := DBAliasName;
3210	<	DataType := FieldType;
3211	<	Size := FieldSize;
3212	<	Precision := FieldPrecision;
3213	<	Required := not FieldNullable;
3214	<	InternalCalcField := False;
3215	<	if (FieldName <> '') and (RelationName <> '') then
3216	<	begin
3217	<	if Has_COMPUTED_BLR(RelationName, FieldName) then
3218	<	begin
3219	<	Attributes := [faReadOnly];
3220	<	InternalCalcField := True;
3221	<	FNeedsRefresh := True;
3222	<	end
3223	<	else
3224	<	begin
3225	<	if Has_DEFAULT_VALUE(RelationName, FieldName) then
3226	<	begin
3227	<	if not FieldNullable then
3228	<	Attributes := [faRequired];
3229	<	end
3230	<	else
3231	<	FNeedsRefresh := True;
3232	<	end;
3233	<	end;
3234	<	end;
3235	<	end;
3236	<	end;
3237	<	finally
3238	<	Query.free;
3239	<	FreeNodes;
3240	<	Database.InternalTransaction.Commit;
3241	<	FieldDefs.EndUpdate;
3242	<	end;
3243	<	end;
3244	<
3245	<	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
3246	<	begin
3247	<	CopyRecordBuffer(FModelBuffer, Buffer);
3248	<	end;
3249	<
3250	<	procedure TIBCustomDataSet.InternalLast;
3251	<	var
3252	<	Buffer: PChar;
3253	<	begin
3254	<	if (FQSelect.EOF) then
3255	<	FCurrentRecord := FRecordCount
3256	<	else begin
3257	<	Buffer := AllocRecordBuffer;
3258	<	try
3259	<	while FQSelect.Next <> nil do
3260	<	begin
3261	<	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3262	<	Inc(FRecordCount);
3263	<	end;
3264	<	FCurrentRecord := FRecordCount;
3265	<	finally
3266	<	FreeRecordBuffer(Buffer);
3267	<	end;
3268	<	end;
3269	<	end;
3270	<
3271	<	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
3272	<	var
3273	<	i: Integer;
3274	<	cur_param: TIBXSQLVAR;
3275	<	cur_field: TField;
3276	<	s: TStream;
3277	<	begin
3278	<	if FQSelect.SQL.Text = '' then
3279	<	IBError(ibxeEmptyQuery, [nil]);
3280	<	if not FInternalPrepared then
3281	<	InternalPrepare;
3282	<	if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
3283	<	begin
3284	<	for i := 0 to SQLParams.Count - 1 do
3285	<	begin
3286	<	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
3287	<	cur_param := SQLParams[i];
3288	<	if (cur_field <> nil) then begin
3289	<	if (cur_field.IsNull) then
3290	<	cur_param.IsNull := True
3291	<	else case cur_field.DataType of
3292	<	ftString:
3293	<	cur_param.AsString := cur_field.AsString;
3294	<	ftBoolean, ftSmallint, ftWord:
3295	<	cur_param.AsShort := cur_field.AsInteger;
3296	<	ftInteger:
3297	<	cur_param.AsLong := cur_field.AsInteger;
3298	<	ftLargeInt:
3299	<	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
3300	<	ftFloat, ftCurrency:
3301	<	cur_param.AsDouble := cur_field.AsFloat;
3302	<	ftBCD:
3303	<	cur_param.AsCurrency := cur_field.AsCurrency;
3304	<	ftDate:
3305	<	cur_param.AsDate := cur_field.AsDateTime;
3306	<	ftTime:
3307	<	cur_param.AsTime := cur_field.AsDateTime;
3308	<	ftDateTime:
3309	<	cur_param.AsDateTime := cur_field.AsDateTime;
3310	<	ftBlob, ftMemo:
3311	<	begin
3312	<	s := nil;
3313	<	try
3314	<	s := DataSource.DataSet.
3315	<	CreateBlobStream(cur_field, bmRead);
3316	<	cur_param.LoadFromStream(s);
3317	<	finally
3318	<	s.free;
3319	<	end;
3320	<	end;
3321	<	else
3322	<	IBError(ibxeNotSupported, [nil]);
3323	<	end;
3324	<	end;
3325	<	end;
3326	<	end;
3327	<	end;
3328	<
3329	<	procedure TIBCustomDataSet.ReQuery;
3330	<	begin
3331	<	FQSelect.Close;
3332	<	ClearBlobCache;
3333	<	FCurrentRecord := -1;
3334	<	FRecordCount := 0;
3335	<	FDeletedRecords := 0;
3336	<	FBPos := 0;
3337	<	FOBPos := 0;
3338	<	FBEnd := 0;
3339	<	FOBEnd := 0;
3340	<	FQSelect.Close;
3341	<	FQSelect.ExecQuery;
3342	<	FOpen := FQSelect.Open;
3343	<	First;
3344	<	end;
3345	<
3346	<	procedure TIBCustomDataSet.InternalOpen;
3347	<	var
3348	<	SetCursor: Boolean;
3349	<
3350	<	function RecordDataLength(n: Integer): Long;
3351	<	begin
3352	<	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
3353	<	end;
3354	<
3355	<	begin
3356	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3357	<	if SetCursor then
3358	<	Screen.Cursor := crHourGlass;
3359	<	try
3360	<	ActivateConnection;
3361	<	ActivateTransaction;
3362	<	if FQSelect.SQL.Text = '' then
3363	<	IBError(ibxeEmptyQuery, [nil]);
3364	<	if not FInternalPrepared then
3365	<	InternalPrepare;
3366	<	if FQSelect.SQLType = SQLSelect then
3367	<	begin
3368	<	if DefaultFields then
3369	<	CreateFields;
3370	<	BindFields(True);
3371	<	FCurrentRecord := -1;
3372	<	FQSelect.ExecQuery;
3373	<	FOpen := FQSelect.Open;
3374	<
3375	<	{ Initialize offsets, buffer sizes, etc...
3376	<	1. Initially FRecordSize is just the "RecordDataLength".
3377	<	2. Allocate a "model" buffer and do a dummy fetch
3378	<	3. After the dummy fetch, FRecordSize will be appropriately
3379	<	adjusted to reflect the additional "weight" of the field
3380	<	data.
3381	<	4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize.
3382	<	5. Now, with the BufferSize available, allocate memory for chunks of records
3383	<	6. Re-allocate the model buffer, accounting for the new
3384	<	FRecordBufferSize.
3385	<	7. Finally, calls to AllocRecordBuffer will work!.
3386	<	}
3387	<	{Step 1}
3388	<	FRecordSize := RecordDataLength(FQSelect.Current.Count);
3389	<	{Step 2, 3}
3390	<	IBAlloc(FModelBuffer, 0, FRecordSize);
3391	<	FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer);
3392	<	{Step 4}
3393	<	FCalcFieldsOffset := FRecordSize;
3394	<	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
3395	<	FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
3396	<	{Step 5}
3397	<	if UniDirectional then
3398	<	FBufferChunkSize := FRecordBufferSize * UniCache
3399	<	else
3400	<	FBufferChunkSize := FRecordBufferSize * BufferChunks;
3401	<	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
3402	<	if FCachedUpdates or (csReading in ComponentState) then
3403	<	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
3404	<	FBPos := 0;
3405	<	FOBPos := 0;
3406	<	FBEnd := 0;
3407	<	FOBEnd := 0;
3408	<	FCacheSize := FBufferChunkSize;
3409	<	FOldCacheSize := FBufferChunkSize;
3410	<	{Step 6}
3411	<	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count),
3412	<	FRecordBufferSize);
3413	<	{Step 7}
3414	<	FOldBuffer := AllocRecordBuffer;
3415	<	end
3416	<	else
3417	<	FQSelect.ExecQuery;
3418	<	finally
3419	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3420	<	Screen.Cursor := crDefault;
3421	<	end;
3422	<	end;
3423	<
3424	<	procedure TIBCustomDataSet.InternalPost;
3425	<	var
3426	<	Qry: TIBSQL;
3427	<	Buff: PChar;
3428	<	SetCursor: Boolean;
3429	<	bInserting: Boolean;
3430	<	begin
3431	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3432	<	if SetCursor then
3433	<	Screen.Cursor := crHourGlass;
3434	<	try
3435	<	Buff := GetActiveBuf;
3436	<	CheckEditState;
3437	<	AdjustRecordOnInsert(Buff);
3438	<	if (State = dsInsert) then
3439	<	begin
3440	<	bInserting := True;
3441	<	Qry := FQInsert;
3442	<	PRecordData(Buff)^.rdUpdateStatus := usInserted;
3443	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3444	<	WriteRecordCache(FRecordCount, Buff);
3445	<	FCurrentRecord := FRecordCount;
3446	<	end
3447	<	else begin
3448	<	bInserting := False;
3449	<	Qry := FQModify;
3450	<	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
3451	<	begin
3452	<	PRecordData(Buff)^.rdUpdateStatus := usModified;
3453	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
3454	<	end
3455	<	else if PRecordData(Buff)^.
3456	<	rdCachedUpdateStatus = cusUninserted then
3457	<	begin
3458	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3459	<	Dec(FDeletedRecords);
3460	<	end;
3461	<	end;
3462	<	if (not CachedUpdates) then
3463	<	InternalPostRecord(Qry, Buff)
3464	<	else begin
3465	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3466	<	FUpdatesPending := True;
3467	<	end;
3468	<	if bInserting then
3469	<	Inc(FRecordCount);
3470	<	finally
3471	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3472	<	Screen.Cursor := crDefault;
3473	<	end;
3474	<	end;
3475	<
3476	<	procedure TIBCustomDataSet.InternalRefresh;
3477	<	begin
3478	<	inherited InternalRefresh;
3479	<	InternalRefreshRow;
3480	<	end;
3481	<
3482	<	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
3483	<	begin
3484	<	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
3485	<	end;
3486	<
3487	<	function TIBCustomDataSet.IsCursorOpen: Boolean;
3488	<	begin
3489	<	result := FOpen;
3490	<	end;
3491	<
3492	<	procedure TIBCustomDataSet.Loaded;
3493	<	begin
3494	<	if assigned(FQSelect) then
3495	<	FBaseSQLSelect.assign(FQSelect.SQL);
3496	<	inherited Loaded;
3497	<	end;
3498	<
3499	<	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
3500	<	Options: TLocateOptions): Boolean;
3501	<	var
3502	<	{$IF FPC_FULLVERSION >= 20700 }
3503	<	CurBookmark: TBookmark;
3504	<	{$ELSE}
3505	<	CurBookmark: string;
3506	<	{$ENDIF}
3507	<	begin
3508	<	DisableControls;
3509	<	try
3510	<	CurBookmark := Bookmark;
3511	<	First;
3512	<	result := InternalLocate(KeyFields, KeyValues, Options);
3513	<	if not result then
3514	<	Bookmark := CurBookmark;
3515	<	finally
3516	<	EnableControls;
3517	<	end;
3518	<	end;
3519	<
3520	<	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
3521	<	const ResultFields: string): Variant;
3522	<	var
3523	<	fl: TList;
3524	<	{$IF FPC_FULLVERSION >= 20700 }
3525	<	CurBookmark: TBookmark;
3526	<	{$ELSE}
3527	<	CurBookmark: string;
3528	<	{$ENDIF}
3529	<	begin
3530	<	DisableControls;
3531	<	fl := TList.Create;
3532	<	CurBookmark := Bookmark;
3533	<	try
3534	<	First;
3535	<	if InternalLocate(KeyFields, KeyValues, []) then
3536	<	begin
3537	<	if (ResultFields <> '') then
3538	<	result := FieldValues[ResultFields]
3539	<	else
3540	<	result := NULL;
3541	<	end
3542	<	else
3543	<	result := Null;
3544	<	finally
3545	<	Bookmark := CurBookmark;
3546	<	fl.Free;
3547	<	EnableControls;
3548	<	end;
3549	<	end;
3550	<
3551	<	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
3552	<	begin
3553	<	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
3554	<	end;
3555	<
3556	<	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
3557	<	begin
3558	<	PRecordData(Buffer)^.rdBookmarkFlag := Value;
3559	<	end;
3560	<
3561	<	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
3562	<	begin
3563	<	if not Value and FCachedUpdates then
3564	<	CancelUpdates;
3565	<	if (not (csReading in ComponentState)) and Value then
3566	<	CheckDatasetClosed;
3567	<	FCachedUpdates := Value;
3568	<	end;
3569	<
3570	<	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
3571	<	begin
3572	<	if IsLinkedTo(Value) then
3573	<	IBError(ibxeCircularReference, [nil]);
3574	<	if FDataLink <> nil then
3575	<	FDataLink.DataSource := Value;
3576	<	end;
3577	<
3578	<	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
3579	<	var
3580	<	Buff, TmpBuff: PChar;
3581	<	MappedFieldPos: integer;
3582	<	begin
3583	<	Buff := GetActiveBuf;
3584	<	if Field.FieldNo < 0 then
3585	<	begin
3586	<	TmpBuff := Buff + FRecordSize + Field.Offset;
3587	<	Boolean(TmpBuff[0]) := LongBool(Buffer);
3588	<	if Boolean(TmpBuff[0]) then
3589	<	Move(Buffer^, TmpBuff[1], Field.DataSize);
3590	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3591	<	end
3592	<	else begin
3593	<	CheckEditState;
3594	<	with PRecordData(Buff)^ do
3595	<	begin
3596	<	{ If inserting, Adjust record position }
3597	<	AdjustRecordOnInsert(Buff);
3598	<	MappedFieldPos := FMappedFieldPosition[Field.FieldNo - 1];
3599	<	if (MappedFieldPos > 0) and
3600	<	(MappedFieldPos <= rdFieldCount) then
3601	<	begin
3602	<	Field.Validate(Buffer);
3603	<	if (Buffer = nil) or
3604	<	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
3605	<	rdFields[MappedFieldPos].fdIsNull := True
3606	<	else begin
3607	<	Move(Buffer^, Buff[rdFields[MappedFieldPos].fdDataOfs],
3608	<	rdFields[MappedFieldPos].fdDataSize);
3609	<	if (rdFields[MappedFieldPos].fdDataType = SQL_TEXT) or
3610	<	(rdFields[MappedFieldPos].fdDataType = SQL_VARYING) then
3611	<	rdFields[MappedFieldPos].fdDataLength := StrLen(PChar(Buffer));
3612	<	rdFields[MappedFieldPos].fdIsNull := False;
3613	<	if rdUpdateStatus = usUnmodified then
3614	<	begin
3615	<	if CachedUpdates then
3616	<	begin
3617	<	FUpdatesPending := True;
3618	<	if State = dsInsert then
3619	<	rdCachedUpdateStatus := cusInserted
3620	<	else if State = dsEdit then
3621	<	rdCachedUpdateStatus := cusModified;
3622	<	end;
3623	<
3624	<	if State = dsInsert then
3625	<	rdUpdateStatus := usInserted
3626	<	else
3627	<	rdUpdateStatus := usModified;
3628	<	end;
3629	<	WriteRecordCache(rdRecordNumber, Buff);
3630	<	SetModified(True);
3631	<	end;
3632	<	end;
3633	<	end;
3634	<	end;
3635	<	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
3636	<	DataEvent(deFieldChange, PtrInt(Field));
3637	<	end;
3638	<
3639	<	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
3640	<	begin
3641	<	CheckBrowseMode;
3642	<	if (Value < 1) then
3643	<	Value := 1
3644	<	else if Value > FRecordCount then
3645	<	begin
3646	<	InternalLast;
3647	<	Value := Min(FRecordCount, Value);
3648	<	end;
3649	<	if (Value <> RecNo) then
3650	<	begin
3651	<	DoBeforeScroll;
3652	<	FCurrentRecord := Value - 1;
3653	<	Resync([]);
3654	<	DoAfterScroll;
3655	<	end;
3656	<	end;
3657	<
3658	<	procedure TIBCustomDataSet.Disconnect;
3659	<	begin
3660	<	Close;
3661	<	InternalUnPrepare;
3662	<	end;
3663	<
3664	<	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
3665	<	begin
3666	<	if not CanModify then
3667	<	IBError(ibxeCannotUpdate, [nil])
3668	<	else
3669	<	FUpdateMode := Value;
3670	<	end;
3671	<
3672	<
3673	<	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
3674	<	begin
3675	<	if Value <> FUpdateObject then
3676	<	begin
3677	<	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
3678	<	FUpdateObject.DataSet := nil;
3679	<	FUpdateObject := Value;
3680	<	if Assigned(FUpdateObject) then
3681	<	begin
3682	<	if Assigned(FUpdateObject.DataSet) and
3683	<	(FUpdateObject.DataSet <> Self) then
3684	<	FUpdateObject.DataSet.UpdateObject := nil;
3685	<	FUpdateObject.DataSet := Self;
3686	<	end;
3687	<	end;
3688	<	end;
3689	<
3690	<	function TIBCustomDataSet.ConstraintsStored: Boolean;
3691	<	begin
3692	<	Result := Constraints.Count > 0;
3693	<	end;
3694	<
3695	<	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
3696	<	begin
3697	<	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
3698	<	end;
3699	<
3700	<
3701	<	procedure TIBCustomDataSet.InternalUnPrepare;
3702	<	begin
3703	<	if FInternalPrepared then
3704	<	begin
3705	<	CheckDatasetClosed;
3706	<	FieldDefs.Clear;
3707	<	FieldDefs.Updated := false;
3708	<	FInternalPrepared := False;
3709	<	Setlength(FAliasNameList,0);
3710	<	end;
3711	<	end;
3712	<
3713	<	procedure TIBCustomDataSet.InternalExecQuery;
3714	<	var
3715	<	DidActivate: Boolean;
3716	<	SetCursor: Boolean;
3717	<	begin
3718	<	DidActivate := False;
3719	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3720	<	if SetCursor then
3721	<	Screen.Cursor := crHourGlass;
3722	<	try
3723	<	ActivateConnection;
3724	<	DidActivate := ActivateTransaction;
3725	<	if FQSelect.SQL.Text = '' then
3726	<	IBError(ibxeEmptyQuery, [nil]);
3727	<	if not FInternalPrepared then
3728	<	InternalPrepare;
3729	<	if FQSelect.SQLType = SQLSelect then
3730	<	begin
3731	<	IBError(ibxeIsASelectStatement, [nil]);
3732	<	end
3733	<	else
3734	<	FQSelect.ExecQuery;
3735	<	finally
3736	<	if DidActivate then
3737	<	DeactivateTransaction;
3738	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3739	<	Screen.Cursor := crDefault;
3740	<	end;
3741	<	end;
3742	<
3743	<	function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE;
3744	<	begin
3745	<	Result := FQSelect.Handle;
3746	<	end;
3747	<
3748	<	function TIBCustomDataSet.GetParser: TSelectSQLParser;
3749	<	begin
3750	<	if not assigned(FParser) then
3751	<	FParser := CreateParser;
3752	<	Result := FParser
3753	<	end;
3754	<
3755	<	procedure TIBCustomDataSet.ResetParser;
3756	<	begin
3757	<	if assigned(FParser) then
3758	<	begin
3759	<	FParser.Free;
3760	<	FParser := nil;
3761	<	SQLChanging(nil)
3762	<	end;
3763	<	end;
3764	<
3765	<	function TIBCustomDataSet.HasParser: boolean;
3766	<	begin
3767	<	Result := not (csDesigning in ComponentState) and (FParser <> nil)
3768	<	end;
3769	<
3770	<	procedure TIBCustomDataSet.SetGenerateParamNames(AValue: Boolean);
3771	<	begin
3772	<	if FGenerateParamNames = AValue then Exit;
3773	<	FGenerateParamNames := AValue;
3774	<	Disconnect
3775	<	end;
3776	<
3777	<	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
3778	<	begin
3779	<	inherited InitRecord(Buffer);
3780	<	with PRecordData(Buffer)^ do
3781	<	begin
3782	<	rdUpdateStatus := TUpdateStatus(usInserted);
3783	<	rdBookMarkFlag := bfInserted;
3784	<	rdRecordNumber := -1;
3785	<	end;
3786	<	end;
3787	<
3788	<	procedure TIBCustomDataSet.InternalInsert;
3789	<	begin
3790	<	CursorPosChanged;
3791	<	end;
3792	<
3793	<	{ TIBDataSet IProviderSupport }
3794	<
3795	<	(*procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
3796	<	begin
3797	<	if Commit then
3798	<	Transaction.Commit else
3799	<	Transaction.Rollback;
3800	<	end;
3801	<
3802	<	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
3803	<	ResultSet: Pointer = nil): Integer;
3804	<	var
3805	<	FQuery: TIBQuery;
3806	<	begin
3807	<	if Assigned(ResultSet) then
3808	<	begin
3809	<	TDataSet(ResultSet^) := TIBQuery.Create(nil);
3810	<	with TIBQuery(ResultSet^) do
3811	<	begin
3812	<	SQL.Text := ASQL;
3813	<	Params.Assign(AParams);
3814	<	Open;
3815	<	Result := RowsAffected;
3816	<	end;
3817	<	end
3818	<	else
3819	<	begin
3820	<	FQuery := TIBQuery.Create(nil);
3821	<	try
3822	<	FQuery.Database := Database;
3823	<	FQuery.Transaction := Transaction;
3824	<	FQuery.GenerateParamNames := True;
3825	<	FQuery.SQL.Text := ASQL;
3826	<	FQuery.Params.Assign(AParams);
3827	<	FQuery.ExecSQL;
3828	<	Result := FQuery.RowsAffected;
3829	<	finally
3830	<	FQuery.Free;
3831	<	end;
3832	<	end;
3833	<	end;
3834	<
3835	<	function TIBCustomDataSet.PSGetQuoteChar: string;
3836	<	begin
3837	<	if Database.SQLDialect = 3 then
3838	<	Result := '"' else
3839	<	Result := '';
3840	<	end;
3841	<
3842	<	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
3843	<	var
3844	<	PrevErr: Integer;
3845	<	begin
3846	<	if Prev <> nil then
3847	<	PrevErr := Prev.ErrorCode else
3848	<	PrevErr := 0;
3849	<	if E is EIBError then
3850	<	with EIBError(E) do
3851	<	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
3852	<	Result := inherited PSGetUpdateException(E, Prev);
3853	<	end;
3854	<
3855	<	function TIBCustomDataSet.PSInTransaction: Boolean;
3856	<	begin
3857	<	Result := Transaction.InTransaction;
3858	<	end;
3859	<
3860	<	function TIBCustomDataSet.PSIsSQLBased: Boolean;
3861	<	begin
3862	<	Result := True;
3863	<	end;
3864	<
3865	<	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
3866	<	begin
3867	<	Result := True;
3868	<	end;
3869	<
3870	<	procedure TIBCustomDataSet.PSReset;
3871	<	begin
3872	<	inherited PSReset;
3873	<	if Active then
3874	<	begin
3875	<	Close;
3876	<	Open;
3877	<	end;
3878	<	end;
3879	<
3880	<	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
3881	<	var
3882	<	UpdateAction: TIBUpdateAction;
3883	<	SQL: string;
3884	<	Params: TParams;
3885	<
3886	<	procedure AssignParams(DataSet: TDataSet; Params: TParams);
3887	<	var
3888	<	I: Integer;
3889	<	Old: Boolean;
3890	<	Param: TParam;
3891	<	PName: string;
3892	<	Field: TField;
3893	<	Value: Variant;
3894	<	begin
3895	<	for I := 0 to Params.Count - 1 do
3896	<	begin
3897	<	Param := Params[I];
3898	<	PName := Param.Name;
3899	<	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
3900	<	if Old then System.Delete(PName, 1, 4);
3901	<	Field := DataSet.FindField(PName);
3902	<	if not Assigned(Field) then Continue;
3903	<	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
3904	<	begin
3905	<	Value := Field.NewValue;
3906	<	if VarIsEmpty(Value) then Value := Field.OldValue;
3907	<	Param.AssignFieldValue(Field, Value);
3908	<	end;
3909	<	end;
3910	<	end;
3911	<
3912	<	begin
3913	<	Result := False;
3914	<	if Assigned(OnUpdateRecord) then
3915	<	begin
3916	<	UpdateAction := uaFail;
3917	<	if Assigned(FOnUpdateRecord) then
3918	<	begin
3919	<	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
3920	<	Result := UpdateAction = uaApplied;
3921	<	end;
3922	<	end
3923	<	else if Assigned(FUpdateObject) then
3924	<	begin
3925	<	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
3926	<	if SQL <> '' then
3927	<	begin
3928	<	Params := TParams.Create;
3929	<	try
3930	<	Params.ParseSQL(SQL, True);
3931	<	AssignParams(Delta, Params);
3932	<	if PSExecuteStatement(SQL, Params) = 0 then
3933	<	IBError(ibxeNoRecordsAffected, [nil]);
3934	<	Result := True;
3935	<	finally
3936	<	Params.Free;
3937	<	end;
3938	<	end;
3939	<	end;
3940	<	end;
3941	<
3942	<	procedure TIBCustomDataSet.PSStartTransaction;
3943	<	begin
3944	<	ActivateConnection;
3945	<	Transaction.StartTransaction;
3946	<	end;
3947	<
3948	<	function TIBCustomDataSet.PSGetTableName: string;
3949	<	begin
3950	<	//  if not FInternalPrepared then
3951	<	//    InternalPrepare;
3952	<	{ It is possible for the FQSelectSQL to be unprepared
3953	<	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
3954	<	So check the Prepared of the SelectSQL instead }
3955	<	if not FQSelect.Prepared then
3956	<	FQSelect.Prepare;
3957	<	Result := FQSelect.UniqueRelationName;
3958	<	end;*)
3959	<
3960	<	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
3961	<	begin
3962	<	InternalBatchInput(InputObject);
3963	<	end;
3964	<
3965	<	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
3966	<	begin
3967	<	InternalBatchOutput(OutputObject);
3968	<	end;
3969	<
3970	<	procedure TIBDataSet.ExecSQL;
3971	<	begin
3972	<	InternalExecQuery;
3973	<	end;
3974	<
3975	<	procedure TIBDataSet.Prepare;
3976	<	begin
3977	<	InternalPrepare;
3978	<	end;
3979	<
3980	<	procedure TIBDataSet.UnPrepare;
3981	<	begin
3982	<	InternalUnPrepare;
3983	<	end;
3984	<
3985	<	function TIBDataSet.GetPrepared: Boolean;
3986	<	begin
3987	<	Result := InternalPrepared;
3988	<	end;
3989	<
3990	<	procedure TIBDataSet.InternalOpen;
3991	<	begin
3992	<	ActivateConnection;
3993	<	ActivateTransaction;
3994	<	InternalSetParamsFromCursor;
3995	<	Inherited InternalOpen;
3996	<	end;
3997	<
3998	<	procedure TIBDataSet.SetFiltered(Value: Boolean);
3999	<	begin
4000	<	if(Filtered <> Value) then
4001	<	begin
4002	<	inherited SetFiltered(value);
4003	<	if Active then
4004	<	begin
4005	<	Close;
4006	<	Open;
4007	<	end;
4008	<	end
4009	<	else
4010	<	inherited SetFiltered(value);
4011	<	end;
4012	<
4013	<	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
4014	<	begin
4015	<	Result := false;
4016	<	if not Assigned(Bookmark) then
4017	<	exit;
4018	<	Result := PInteger(Bookmark)^ < FRecordCount;
4019	<	end;
4020	<
4021	<	function TIBCustomDataSet.GetFieldData(Field: TField;
4022	<	Buffer: Pointer): Boolean;
4023	<	{$IFDEF TBCDFIELD_IS_BCD}
4024	<	var
4025	<	lTempCurr : System.Currency;
4026	<	begin
4027	<	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4028	<	begin
4029	<	Result := InternalGetFieldData(Field, @lTempCurr);
4030	<	if Result then
4031	<	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
4032	<	end
4033	<	else
4034	<	{$ELSE}
4035	<	begin
4036	<	{$ENDIF}
4037	<	Result := InternalGetFieldData(Field, Buffer);
4038	<	end;
4039	<
4040	<	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
4041	<	NativeFormat: Boolean): Boolean;
4042	<	begin
4043	<	if (Field.DataType = ftBCD) and not NativeFormat then
4044	<	Result := InternalGetFieldData(Field, Buffer)
4045	<	else
4046	<	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
4047	<	end;
4048	<
4049	<	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
4050	<	{$IFDEF TDBDFIELD_IS_BCD}
4051	<	var
4052	<	lTempCurr : System.Currency;
4053	<	begin
4054	<	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4055	<	begin
4056	<	BCDToCurr(TBCD(Buffer^), lTempCurr);
4057	<	InternalSetFieldData(Field, @lTempCurr);
4058	<	end
4059	<	else
4060	<	{$ELSE}
4061	<	begin
4062	<	{$ENDIF}
4063	<	InternalSetFieldData(Field, Buffer);
4064	<	end;
4065	<
4066	<	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
4067	<	NativeFormat: Boolean);
4068	<	begin
4069	<	if (not NativeFormat) and (Field.DataType = ftBCD) then
4070	<	InternalSetfieldData(Field, Buffer)
4071	<	else
4072	<	inherited SetFieldData(Field, buffer, NativeFormat);
4073	<	end;
4074	<
4075	<	{ TIBDataSetUpdateObject }
4076	<
4077	<	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
4078	<	begin
4079	<	inherited Create(AOwner);
4080	<	FRefreshSQL := TStringList.Create;
4081	<	end;
4082	<
4083	<	destructor TIBDataSetUpdateObject.Destroy;
4084	<	begin
4085	<	FRefreshSQL.Free;
4086	<	inherited Destroy;
4087	<	end;
4088	<
4089	<	procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings);
4090	<	begin
4091	<	FRefreshSQL.Assign(Value);
4092	<	end;
4093	<
4094	<	procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
4095	<	begin
4096	<	if not Assigned(DataSet) then Exit;
4097	<	DataSet.SetInternalSQLParams(Query, buff);
4098	<	end;
4099	<
4100	<	{ TIBDSBlobStream }
4101	<	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
4102	<	Mode: TBlobStreamMode);
4103	<	begin
4104	<	FField := AField;
4105	<	FBlobStream := ABlobStream;
4106	<	FBlobStream.Seek(0, soFromBeginning);
4107	<	if (Mode = bmWrite) then
4108	<	FBlobStream.Truncate;
4109	<	end;
4110	<
4111	<	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
4112	<	begin
4113	<	result := FBlobStream.Read(Buffer, Count);
4114	<	end;
4115	<
4116	<	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
4117	<	begin
4118	<	result := FBlobStream.Seek(Offset, Origin);
4119	<	end;
4120	<
4121	<	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
4122	<	begin
4123	<	FBlobStream.SetSize(NewSize);
4124	<	end;
4125	<
4126	<	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
4127	<	begin
4128	<	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
4129	<	IBError(ibxeNotEditing, [nil]);
4130	<	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4131	<	TBlobField(FField).Modified := true;
4132	<	result := FBlobStream.Write(Buffer, Count);
4133	<	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4134	<	end;
4135	<
4136	<	{ TIBGenerator }
4137	<
4138	<	procedure TIBGenerator.SetIncrement(const AValue: integer);
4139	<	begin
4140	<	if AValue < 0 then
4141	<	raise Exception.Create('A Generator Increment cannot be negative');
4142	<	FIncrement := AValue
4143	<	end;
4144	<
4145	<	function TIBGenerator.GetNextValue(ADatabase: TIBDatabase;
4146	<	ATransaction: TIBTransaction): integer;
4147	<	begin
4148	<	with TIBSQL.Create(nil) do
4149	<	try
4150	<	Database := ADatabase;
4151	<	Transaction := ATransaction;
4152	<	if not assigned(Database) then
4153	<	IBError(ibxeCannotSetDatabase,[]);
4154	<	if not assigned(Transaction) then
4155	<	IBError(ibxeCannotSetTransaction,[]);
4156	<	with Transaction do
4157	<	if not InTransaction then StartTransaction;
4158	<	SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]);
4159	<	Prepare;
4160	<	ExecQuery;
4161	<	try
4162	<	Result := FieldByName('ID').AsInteger
4163	<	finally
4164	<	Close
4165	<	end;
4166	<	finally
4167	<	Free
4168	<	end;
4169	<	end;
4170	<
4171	<	constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
4172	<	begin
4173	<	FOwner := Owner;
4174	<	FIncrement := 1;
4175	<	end;
4176	<
4177	<
4178	<	procedure TIBGenerator.Apply;
4179	<	begin
4180	<	if (FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then
4181	<	Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction);
4182	<	end;
4183	<
4184	<	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 - 2015                                                }
31	>	{                                                                        }
32	>	{************************************************************************}
33	>
34	>	unit IBCustomDataSet;
35	>
36	>	{$IF FPC_FULLVERSION >= 20700 }
37	>	{$codepage UTF8}
38	>	{$DEFINE HAS_ANSISTRING_CODEPAGE}
39	>	{$DEFINE NEW_TBOOKMARK}
40	>	{$ENDIF}
41	>
42	>	{$R-}
43	>
44	>	{$Mode Delphi}
45	>
46	>	{$IFDEF DELPHI}
47	>	{$DEFINE TDBDFIELD_IS_BCD}
48	>	{$ENDIF}
49	>
50	>	interface
51	>
52	>	uses
53	>	{$IFDEF WINDOWS }
54	>	Windows,
55	>	{$ELSE}
56	>	unix,
57	>	{$ENDIF}
58	>	SysUtils, Classes, IBDatabase, IBExternals, IB, IBHeader,  IBSQL, Db,
59	>	IBUtils, IBBlob, IBSQLParser;
60	>
61	>	const
62	>	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
63	>	UniCache           =  2;     { Uni-directional cache is 2 records big }
64	>
65	>	type
66	>	TIBCustomDataSet = class;
67	>	TIBDataSet = class;
68	>
69	>	{ TIBDataSetUpdateObject }
70	>
71	>	TIBDataSetUpdateObject = class(TComponent)
72	>	private
73	>	FRefreshSQL: TStrings;
74	>	procedure SetRefreshSQL(value: TStrings);
75	>	protected
76	>	function GetDataSet: TIBCustomDataSet; virtual; abstract;
77	>	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
78	>	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
79	>	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
80	>	procedure InternalSetParams(Query: TIBSQL; buff: PChar);
81	>	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
82	>	public
83	>	constructor Create(AOwner: TComponent); override;
84	>	destructor Destroy; override;
85	>	published
86	>	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
87	>	end;
88	>
89	>	TBlobDataArray = array[0..0] of TIBBlobStream;
90	>	PBlobDataArray = ^TBlobDataArray;
91	>
92	>	{ TIBCustomDataSet }
93	>	TFieldData = record
94	>	fdDataType: Short;
95	>	fdDataScale: Short;
96	>	fdNullable: Boolean;
97	>	fdIsNull: Boolean;
98	>	fdDataSize: Short;
99	>	fdDataLength: Short;
100	>	fdDataOfs: Integer;
101	>	end;
102	>	PFieldData = ^TFieldData;
103	>
104	>	TCachedUpdateStatus = (
105	>	cusUnmodified, cusModified, cusInserted,
106	>	cusDeleted, cusUninserted
107	>	);
108	>	TIBDBKey = record
109	>	DBKey: array[0..7] of Byte;
110	>	end;
111	>	PIBDBKey = ^TIBDBKey;
112	>
113	>	TRecordData = record
114	>	rdBookmarkFlag: TBookmarkFlag;
115	>	rdFieldCount: Short;
116	>	rdRecordNumber: Integer;
117	>	rdCachedUpdateStatus: TCachedUpdateStatus;
118	>	rdUpdateStatus: TUpdateStatus;
119	>	rdSavedOffset: DWORD;
120	>	rdDBKey: TIBDBKey;
121	>	rdFields: array[1..1] of TFieldData;
122	>	end;
123	>	PRecordData = ^TRecordData;
124	>
125	>	{ TIBStringField allows us to have strings longer than 8196 }
126	>
127	>	TIBStringField = class(TStringField)
128	>	private
129	>	FCharacterSetName: RawByteString;
130	>	FCharacterSetSize: integer;
131	>	protected
132	>	function GetDefaultWidth: Longint; override;
133	>	public
134	>	constructor Create(aOwner: TComponent); override;
135	>	class procedure CheckTypeSize(Value: Integer); override;
136	>	function GetAsString: string; override;
137	>	function GetAsVariant: Variant; override;
138	>	function GetValue(var Value: string): Boolean;
139	>	procedure SetAsString(const Value: string); override;
140	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
141	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
142	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
143	>	private
144	>	FCodePage: TSystemCodePage;
145	>	public
146	>	property CodePage: TSystemCodePage read FCodePage write FCodePage;
147	>	{$ENDIF}
148	>	end;
149	>
150	>	{ TIBWideStringField }
151	>
152	>	TIBWideStringField = class(TWideStringField)
153	>	private
154	>	FCharacterSetName: RawByteString;
155	>	FCharacterSetSize: integer;
156	>	public
157	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
158	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
159	>	end;
160	>
161	>	{ TIBBCDField }
162	>	{  Actually, there is no BCD involved in this type,
163	>	instead it deals with currency types.
164	>	In IB, this is an encapsulation of Numeric (x, y)
165	>	where x < 18 and y <= 4.
166	>	Note: y > 4 will default to Floats
167	>	}
168	>	TIBBCDField = class(TBCDField)
169	>	protected
170	>	class procedure CheckTypeSize(Value: Integer); override;
171	>	function GetAsCurrency: Currency; override;
172	>	function GetAsString: string; override;
173	>	function GetAsVariant: Variant; override;
174	>	function GetDataSize: Integer; override;
175	>	public
176	>	constructor Create(AOwner: TComponent); override;
177	>	published
178	>	property Size default 8;
179	>	end;
180	>
181	>	{TIBMemoField}
182	>	{Allows us to show truncated text in DBGrids and anything else that uses
183	>	DisplayText}
184	>
185	>	TIBMemoField = class(TMemoField)
186	>	private
187	>	FCharacterSetName: RawByteString;
188	>	FCharacterSetSize: integer;
189	>	FDisplayTextAsClassName: boolean;
190	>	function GetTruncatedText: string;
191	>	protected
192	>	function GetAsString: string; override;
193	>	function GetDefaultWidth: Longint; override;
194	>	procedure GetText(var AText: string; ADisplayText: Boolean); override;
195	>	procedure SetAsString(const AValue: string); override;
196	>	public
197	>	constructor Create(AOwner: TComponent); override;
198	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
199	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
200	>	published
201	>	property DisplayTextAsClassName: boolean read FDisplayTextAsClassName
202	>	write FDisplayTextAsClassName;
203	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
204	>	private
205	>	FCodePage: TSystemCodePage;
206	>	FFCodePage: TSystemCodePage;
207	>	public
208	>	property CodePage: TSystemCodePage read FFCodePage write FFCodePage;
209	>	{$ENDIF}
210	>	end;
211	>
212	>	{ TIBWideMemoField }
213	>
214	>	TIBWideMemoField = class(TWideMemoField)
215	>	private
216	>	FCharacterSetName: RawByteString;
217	>	FCharacterSetSize: integer;
218	>	FDisplayTextAsClassName: boolean;
219	>	function GetTruncatedText: string;
220	>	protected
221	>	function GetDefaultWidth: Longint; override;
222	>	procedure GetText(var AText: string; ADisplayText: Boolean); override;
223	>	public
224	>	constructor Create(AOwner: TComponent); override;
225	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
226	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
227	>	published
228	>	property DisplayTextAsClassName: boolean read FDisplayTextAsClassName
229	>	write FDisplayTextAsClassName;
230	>	end;
231	>
232	>	TIBDataLink = class(TDetailDataLink)
233	>	private
234	>	FDataSet: TIBCustomDataSet;
235	>	protected
236	>	procedure ActiveChanged; override;
237	>	procedure RecordChanged(Field: TField); override;
238	>	function GetDetailDataSet: TDataSet; override;
239	>	procedure CheckBrowseMode; override;
240	>	public
241	>	constructor Create(ADataSet: TIBCustomDataSet);
242	>	destructor Destroy; override;
243	>	end;
244	>
245	>	TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord);
246	>
247	>	{ TIBGenerator }
248	>
249	>	TIBGenerator = class(TPersistent)
250	>	private
251	>	FOwner: TIBCustomDataSet;
252	>	FApplyOnEvent: TIBGeneratorApplyOnEvent;
253	>	FFieldName: string;
254	>	FGeneratorName: string;
255	>	FIncrement: integer;
256	>	procedure SetIncrement(const AValue: integer);
257	>	protected
258	>	function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer;
259	>	public
260	>	constructor Create(Owner: TIBCustomDataSet);
261	>	procedure Apply;
262	>	property Owner: TIBCustomDataSet read FOwner;
263	>	published
264	>	property Generator: string read FGeneratorName write FGeneratorName;
265	>	property Field: string read FFieldName write FFieldName;
266	>	property Increment: integer read FIncrement write SetIncrement default 1;
267	>	property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
268	>	end;
269	>
270	>	{TIBControlLink - Allows IB Aware controls to react to dataset state changes}
271	>
272	>	TIBControlLink = class
273	>	private
274	>	FTIBDataSet: TIBCustomDataSet;
275	>	procedure SetIBDataSet(AValue: TIBCustomDataSet);
276	>	protected
277	>	procedure UpdateSQL(Sender: TObject); virtual;
278	>	procedure UpdateParams(Sender: TObject); virtual;
279	>	public
280	>	destructor Destroy; override;
281	>	property IBDataSet: TIBCustomDataSet read FTIBDataSet write SetIBDataSet;
282	>	end;
283	>
284	>	TIBAutoCommit = (acDisabled, acCommitRetaining);
285	>
286	>	{ TIBCustomDataSet }
287	>	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
288	>
289	>	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
290	>	UpdateKind: TUpdateKind; var TheUpdateAction: TIBUpdateAction)
291	>	of object;
292	>	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
293	>	var UpdateAction: TIBUpdateAction) of object;
294	>
295	>	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
296	>
297	>	TDataSetCloseAction = (dcDiscardChanges, dcSaveChanges);
298	>
299	>	TOnValidatePost = procedure (Sender: TObject; var CancelPost: boolean) of object;
300	>
301	>	TIBCustomDataSet = class(TDataset)
302	>	private
303	>	FAutoCommit: TIBAutoCommit;
304	>	FGenerateParamNames: Boolean;
305	>	FGeneratorField: TIBGenerator;
306	>	FNeedsRefresh: Boolean;
307	>	FForcedRefresh: Boolean;
308	>	FDidActivate: Boolean;
309	>	FIBLoaded: Boolean;
310	>	FBase: TIBBase;
311	>	FBlobCacheOffset: Integer;
312	>	FBlobStreamList: TList;
313	>	FBufferChunks: Integer;
314	>	FBufferCache,
315	>	FOldBufferCache: PChar;
316	>	FBufferChunkSize,
317	>	FCacheSize,
318	>	FOldCacheSize: Integer;
319	>	FFilterBuffer: PChar;
320	>	FBPos,
321	>	FOBPos,
322	>	FBEnd,
323	>	FOBEnd: DWord;
324	>	FCachedUpdates: Boolean;
325	>	FCalcFieldsOffset: Integer;
326	>	FCurrentRecord: Long;
327	>	FDeletedRecords: Long;
328	>	FModelBuffer,
329	>	FOldBuffer: PChar;
330	>	FOnValidatePost: TOnValidatePost;
331	>	FOpen: Boolean;
332	>	FInternalPrepared: Boolean;
333	>	FQDelete,
334	>	FQInsert,
335	>	FQRefresh,
336	>	FQSelect,
337	>	FQModify: TIBSQL;
338	>	FRecordBufferSize: Integer;
339	>	FRecordCount: Integer;
340	>	FRecordSize: Integer;
341	>	FDataSetCloseAction: TDataSetCloseAction;
342	>	FUniDirectional: Boolean;
343	>	FUpdateMode: TUpdateMode;
344	>	FUpdateObject: TIBDataSetUpdateObject;
345	>	FParamCheck: Boolean;
346	>	FUpdatesPending: Boolean;
347	>	FUpdateRecordTypes: TIBUpdateRecordTypes;
348	>	FMappedFieldPosition: array of Integer;
349	>	FDataLink: TIBDataLink;
350	>
351	>	FBeforeDatabaseDisconnect,
352	>	FAfterDatabaseDisconnect,
353	>	FDatabaseFree: TNotifyEvent;
354	>	FOnUpdateError: TIBUpdateErrorEvent;
355	>	FOnUpdateRecord: TIBUpdateRecordEvent;
356	>	FBeforeTransactionEnd,
357	>	FAfterTransactionEnd,
358	>	FTransactionFree: TNotifyEvent;
359	>	FAliasNameMap: array of string;
360	>	FAliasNameList: array of string;
361	>	FBaseSQLSelect: TStrings;
362	>	FParser: TSelectSQLParser;
363	>	FCloseAction: TTransactionAction;
364	>	FInTransactionEnd: boolean;
365	>	FIBLinks: TList;
366	>	function GetSelectStmtHandle: TISC_STMT_HANDLE;
367	>	procedure SetUpdateMode(const Value: TUpdateMode);
368	>	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
369	>
370	>	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
371	>	procedure AdjustRecordOnInsert(Buffer: Pointer);
372	>	function CanEdit: Boolean;
373	>	function CanInsert: Boolean;
374	>	function CanDelete: Boolean;
375	>	function CanRefresh: Boolean;
376	>	procedure CheckEditState;
377	>	procedure ClearBlobCache;
378	>	procedure ClearIBLinks;
379	>	procedure CopyRecordBuffer(Source, Dest: Pointer);
380	>	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
381	>	procedure DoAfterDatabaseDisconnect(Sender: TObject);
382	>	procedure DoDatabaseFree(Sender: TObject);
383	>	procedure DoBeforeTransactionEnd(Sender: TObject; Action: TTransactionAction);
384	>	procedure DoAfterTransactionEnd(Sender: TObject);
385	>	procedure DoTransactionFree(Sender: TObject);
386	>	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
387	>	Buffer: PChar);
388	>	function GetDatabase: TIBDatabase;
389	>	function GetDBHandle: PISC_DB_HANDLE;
390	>	function GetDeleteSQL: TStrings;
391	>	function GetInsertSQL: TStrings;
392	>	function GetSQLParams: TIBXSQLDA;
393	>	function GetRefreshSQL: TStrings;
394	>	function GetSelectSQL: TStrings;
395	>	function GetStatementType: TIBSQLTypes;
396	>	function GetModifySQL: TStrings;
397	>	function GetTransaction: TIBTransaction;
398	>	function GetTRHandle: PISC_TR_HANDLE;
399	>	function GetParser: TSelectSQLParser;
400	>	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
401	>	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
402	>	Options: TLocateOptions): Boolean; virtual;
403	>	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
404	>	procedure InternalRevertRecord(RecordNumber: Integer); virtual;
405	>	function IsVisible(Buffer: PChar): Boolean;
406	>	procedure RegisterIBLink(Sender: TIBControlLink);
407	>	procedure UnRegisterIBLink(Sender: TIBControlLink);
408	>	procedure SaveOldBuffer(Buffer: PChar);
409	>	procedure SetBufferChunks(Value: Integer);
410	>	procedure SetDatabase(Value: TIBDatabase);
411	>	procedure SetDeleteSQL(Value: TStrings);
412	>	procedure SetInsertSQL(Value: TStrings);
413	>	procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
414	>	procedure SetRefreshSQL(Value: TStrings);
415	>	procedure SetSelectSQL(Value: TStrings);
416	>	procedure SetModifySQL(Value: TStrings);
417	>	procedure SetTransaction(Value: TIBTransaction);
418	>	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
419	>	procedure SetUniDirectional(Value: Boolean);
420	>	procedure RefreshParams;
421	>	function AdjustPosition(FCache: PChar; Offset: DWORD;
422	>	Origin: Integer): DWORD;
423	>	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
424	>	Buffer: PChar);
425	>	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
426	>	ReadOldBuffer: Boolean);
427	>	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
428	>	Buffer: PChar);
429	>	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
430	>	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
431	>	DoCheck: Boolean): TGetResult; virtual;
432	>
433	>	protected
434	>	procedure ActivateConnection;
435	>	function ActivateTransaction: Boolean;
436	>	procedure DeactivateTransaction;
437	>	procedure CheckDatasetClosed;
438	>	procedure CheckDatasetOpen;
439	>	function CreateParser: TSelectSQLParser; virtual;
440	>	procedure FieldDefsFromQuery(SourceQuery: TIBSQL);
441	>	function GetActiveBuf: PChar;
442	>	procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
443	>	procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
444	>	procedure InternalPrepare; virtual;
445	>	procedure InternalUnPrepare; virtual;
446	>	procedure InternalExecQuery; virtual;
447	>	procedure InternalRefreshRow; virtual;
448	>	procedure InternalSetParamsFromCursor; virtual;
449	>	procedure CheckNotUniDirectional;
450	>	procedure SQLChanging(Sender: TObject); virtual;
451	>	procedure SQLChanged(Sender: TObject); virtual;
452	>
453	>	(*    { IProviderSupport }
454	>	procedure PSEndTransaction(Commit: Boolean); override;
455	>	function PSExecuteStatement(const ASQL: string; AParams: TParams;
456	>	ResultSet: Pointer = nil): Integer; override;
457	>	function PsGetTableName: string; override;
458	>	function PSGetQuoteChar: string; override;
459	>	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
460	>	function PSInTransaction: Boolean; override;
461	>	function PSIsSQLBased: Boolean; override;
462	>	function PSIsSQLSupported: Boolean; override;
463	>	procedure PSStartTransaction; override;
464	>	procedure PSReset; override;
465	>	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
466	>	*)
467	>	{ TDataSet support }
468	>	procedure InternalInsert; override;
469	>	procedure InitRecord(Buffer: PChar); override;
470	>	procedure Disconnect; virtual;
471	>	function ConstraintsStored: Boolean;
472	>	procedure ClearCalcFields(Buffer: PChar); override;
473	>	function AllocRecordBuffer: PChar; override;
474	>	procedure DoBeforeDelete; override;
475	>	procedure DoAfterDelete; override;
476	>	procedure DoBeforeEdit; override;
477	>	procedure DoAfterEdit; override;
478	>	procedure DoBeforeInsert; override;
479	>	procedure DoAfterInsert; override;
480	>	procedure DoBeforeClose; override;
481	>	procedure DoBeforeOpen; override;
482	>	procedure DoBeforePost; override;
483	>	procedure DoAfterPost; override;
484	>	procedure FreeRecordBuffer(var Buffer: PChar); override;
485	>	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
486	>	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
487	>	function GetCanModify: Boolean; override;
488	>	function GetDataSource: TDataSource; override;
489	>	function GetDBAliasName(FieldNo: integer): string;
490	>	function GetFieldDefFromAlias(aliasName: string): TFieldDef;
491	>	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
492	>	function GetRecNo: Integer; override;
493	>	function GetRecord(Buffer: PChar; GetMode: TGetMode;
494	>	DoCheck: Boolean): TGetResult; override;
495	>	function GetRecordCount: Integer; override;
496	>	function GetRecordSize: Word; override;
497	>	procedure InternalAutoCommit;
498	>	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
499	>	procedure InternalCancel; override;
500	>	procedure InternalClose; override;
501	>	procedure InternalDelete; override;
502	>	procedure InternalFirst; override;
503	>	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
504	>	procedure InternalGotoBookmark(Bookmark: Pointer); override;
505	>	procedure InternalHandleException; override;
506	>	procedure InternalInitFieldDefs; override;
507	>	procedure InternalInitRecord(Buffer: PChar); override;
508	>	procedure InternalLast; override;
509	>	procedure InternalOpen; override;
510	>	procedure InternalPost; override;
511	>	procedure InternalRefresh; override;
512	>	procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
513	>	procedure InternalSetToRecord(Buffer: PChar); override;
514	>	function IsCursorOpen: Boolean; override;
515	>	procedure Loaded; override;
516	>	procedure ReQuery;
517	>	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
518	>	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
519	>	procedure SetCachedUpdates(Value: Boolean);
520	>	procedure SetDataSource(Value: TDataSource);
521	>	procedure SetGenerateParamNames(AValue: Boolean); virtual;
522	>	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
523	>	procedure SetFieldData(Field : TField; Buffer : Pointer;
524	>	NativeFormat : Boolean); overload; override;
525	>	procedure SetRecNo(Value: Integer); override;
526	>
527	>	protected
528	>	{Likely to be made public by descendant classes}
529	>	property AutoCommit: TIBAutoCommit read FAutoCommit write FAutoCommit default acDisabled;
530	>	property SQLParams: TIBXSQLDA read GetSQLParams;
531	>	property Params: TIBXSQLDA read GetSQLParams;
532	>	property InternalPrepared: Boolean read FInternalPrepared;
533	>	property QDelete: TIBSQL read FQDelete;
534	>	property QInsert: TIBSQL read FQInsert;
535	>	property QRefresh: TIBSQL read FQRefresh;
536	>	property QSelect: TIBSQL read FQSelect;
537	>	property QModify: TIBSQL read FQModify;
538	>	property StatementType: TIBSQLTypes read GetStatementType;
539	>	property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle;
540	>
541	>	{Likely to be made published by descendant classes}
542	>	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
543	>	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
544	>	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
545	>	property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
546	>	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
547	>	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
548	>	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
549	>	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
550	>	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
551	>	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
552	>	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
553	>	property Parser: TSelectSQLParser read GetParser;
554	>	property BaseSQLSelect: TStrings read FBaseSQLSelect;
555	>
556	>	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
557	>	write FBeforeDatabaseDisconnect;
558	>	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
559	>	write FAfterDatabaseDisconnect;
560	>	property DatabaseFree: TNotifyEvent read FDatabaseFree
561	>	write FDatabaseFree;
562	>	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
563	>	write FBeforeTransactionEnd;
564	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
565	>	write FAfterTransactionEnd;
566	>	property TransactionFree: TNotifyEvent read FTransactionFree
567	>	write FTransactionFree;
568	>	property OnValidatePost: TOnValidatePost read FOnValidatePost write FOnValidatePost;
569	>
570	>	public
571	>	constructor Create(AOwner: TComponent); override;
572	>	destructor Destroy; override;
573	>	procedure ApplyUpdates;
574	>	function CachedUpdateStatus: TCachedUpdateStatus;
575	>	procedure CancelUpdates;
576	>	function GetFieldPosition(AliasName: string): integer;
577	>	procedure FetchAll;
578	>	function LocateNext(const KeyFields: string; const KeyValues: Variant;
579	>	Options: TLocateOptions): Boolean;
580	>	procedure RecordModified(Value: Boolean);
581	>	procedure RevertRecord;
582	>	procedure Undelete;
583	>	procedure ResetParser; virtual;
584	>	function HasParser: boolean;
585	>
586	>	{ TDataSet support methods }
587	>	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
588	>	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
589	>	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
590	>	function GetCurrentRecord(Buffer: PChar): Boolean; override;
591	>	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
592	>	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
593	>	function GetFieldData(Field : TField; Buffer : Pointer;
594	>	NativeFormat : Boolean) : Boolean; overload; override;
595	>	property GenerateParamNames: Boolean read FGenerateParamNames write SetGenerateParamNames;
596	>	function Locate(const KeyFields: string; const KeyValues: Variant;
597	>	Options: TLocateOptions): Boolean; override;
598	>	function Lookup(const KeyFields: string; const KeyValues: Variant;
599	>	const ResultFields: string): Variant; override;
600	>	function UpdateStatus: TUpdateStatus; override;
601	>	function IsSequenced: Boolean; override;
602	>	procedure Post; override;
603	>	function ParamByName(ParamName: String): TIBXSQLVAR;
604	>	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
605	>	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
606	>	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
607	>	property UpdatesPending: Boolean read FUpdatesPending;
608	>	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
609	>	write SetUpdateRecordTypes;
610	>	property DataSetCloseAction: TDataSetCloseAction
611	>	read FDataSetCloseAction write FDataSetCloseAction;
612	>
613	>	published
614	>	property Database: TIBDatabase read GetDatabase write SetDatabase;
615	>	property Transaction: TIBTransaction read GetTransaction
616	>	write SetTransaction;
617	>	property ForcedRefresh: Boolean read FForcedRefresh
618	>	write FForcedRefresh default False;
619	>	property AutoCalcFields;
620	>
621	>	property AfterCancel;
622	>	property AfterClose;
623	>	property AfterDelete;
624	>	property AfterEdit;
625	>	property AfterInsert;
626	>	property AfterOpen;
627	>	property AfterPost;
628	>	property AfterRefresh;
629	>	property AfterScroll;
630	>	property BeforeCancel;
631	>	property BeforeClose;
632	>	property BeforeDelete;
633	>	property BeforeEdit;
634	>	property BeforeInsert;
635	>	property BeforeOpen;
636	>	property BeforePost;
637	>	property BeforeRefresh;
638	>	property BeforeScroll;
639	>	property OnCalcFields;
640	>	property OnDeleteError;
641	>	property OnEditError;
642	>	property OnNewRecord;
643	>	property OnPostError;
644	>	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
645	>	write FOnUpdateError;
646	>	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
647	>	write FOnUpdateRecord;
648	>	end;
649	>
650	>	TIBParserDataSet = class(TIBCustomDataSet)
651	>	public
652	>	property Parser;
653	>	end;
654	>
655	>	TIBDataSet = class(TIBParserDataSet)
656	>	private
657	>	function GetPrepared: Boolean;
658	>
659	>	protected
660	>	procedure SetFiltered(Value: Boolean); override;
661	>	procedure InternalOpen; override;
662	>
663	>	public
664	>	procedure Prepare;
665	>	procedure UnPrepare;
666	>	procedure BatchInput(InputObject: TIBBatchInput);
667	>	procedure BatchOutput(OutputObject: TIBBatchOutput);
668	>	procedure ExecSQL;
669	>
670	>	public
671	>	property Params;
672	>	property Prepared : Boolean read GetPrepared;
673	>	property QDelete;
674	>	property QInsert;
675	>	property QRefresh;
676	>	property QSelect;
677	>	property QModify;
678	>	property StatementType;
679	>	property SelectStmtHandle;
680	>	property BaseSQLSelect;
681	>
682	>	published
683	>	{ TIBCustomDataSet }
684	>	property AutoCommit;
685	>	property BufferChunks;
686	>	property CachedUpdates;
687	>	property DeleteSQL;
688	>	property InsertSQL;
689	>	property RefreshSQL;
690	>	property SelectSQL;
691	>	property ModifySQL;
692	>	property GeneratorField;
693	>	property GenerateParamNames;
694	>	property ParamCheck;
695	>	property UniDirectional;
696	>	property Filtered;
697	>	property DataSetCloseAction;
698	>
699	>	property BeforeDatabaseDisconnect;
700	>	property AfterDatabaseDisconnect;
701	>	property DatabaseFree;
702	>	property BeforeTransactionEnd;
703	>	property AfterTransactionEnd;
704	>	property TransactionFree;
705	>
706	>	{ TIBDataSet }
707	>	property Active;
708	>	property AutoCalcFields;
709	>	property DataSource read GetDataSource write SetDataSource;
710	>
711	>	property AfterCancel;
712	>	property AfterClose;
713	>	property AfterDelete;
714	>	property AfterEdit;
715	>	property AfterInsert;
716	>	property AfterOpen;
717	>	property AfterPost;
718	>	property AfterScroll;
719	>	property BeforeCancel;
720	>	property BeforeClose;
721	>	property BeforeDelete;
722	>	property BeforeEdit;
723	>	property BeforeInsert;
724	>	property BeforeOpen;
725	>	property BeforePost;
726	>	property BeforeScroll;
727	>	property OnCalcFields;
728	>	property OnDeleteError;
729	>	property OnEditError;
730	>	property OnFilterRecord;
731	>	property OnNewRecord;
732	>	property OnPostError;
733	>	property OnValidatePost;
734	>	end;
735	>
736	>	{ TIBDSBlobStream }
737	>	TIBDSBlobStream = class(TStream)
738	>	private
739	>	FHasWritten: boolean;
740	>	protected
741	>	FField: TField;
742	>	FBlobStream: TIBBlobStream;
743	>	public
744	>	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
745	>	Mode: TBlobStreamMode);
746	>	destructor Destroy; override;
747	>	function Read(var Buffer; Count: Longint): Longint; override;
748	>	function Seek(Offset: Longint; Origin: Word): Longint; override;
749	>	procedure SetSize(NewSize: Longint); override;
750	>	function Write(const Buffer; Count: Longint): Longint; override;
751	>	end;
752	>
753	>	const
754	>	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
755	>	nil,                { ftUnknown }
756	>	TIBStringField,     { ftString }
757	>	TSmallintField,     { ftSmallint }
758	>	TIntegerField,      { ftInteger }
759	>	TWordField,         { ftWord }
760	>	TBooleanField,      { ftBoolean }
761	>	TFloatField,        { ftFloat }
762	>	TCurrencyField,     { ftCurrency }
763	>	TIBBCDField,        { ftBCD }
764	>	TDateField,         { ftDate }
765	>	TTimeField,         { ftTime }
766	>	TDateTimeField,     { ftDateTime }
767	>	TBytesField,        { ftBytes }
768	>	TVarBytesField,     { ftVarBytes }
769	>	TAutoIncField,      { ftAutoInc }
770	>	TBlobField,         { ftBlob }
771	>	TIBMemoField,       { ftMemo }
772	>	TGraphicField,      { ftGraphic }
773	>	TBlobField,         { ftFmtMemo }
774	>	TBlobField,         { ftParadoxOle }
775	>	TBlobField,         { ftDBaseOle }
776	>	TBlobField,         { ftTypedBinary }
777	>	nil,                { ftCursor }
778	>	TStringField,       { ftFixedChar }
779	>	TIBWideStringField,    { ftWideString }
780	>	TLargeIntField,     { ftLargeInt }
781	>	nil,          { ftADT }
782	>	nil,        { ftArray }
783	>	nil,    { ftReference }
784	>	nil,     { ftDataSet }
785	>	TBlobField,         { ftOraBlob }
786	>	TMemoField,         { ftOraClob }
787	>	TVariantField,      { ftVariant }
788	>	nil,    { ftInterface }
789	>	nil,     { ftIDispatch }
790	>	TGuidField,        { ftGuid }
791	>	TDateTimeField,    {ftTimestamp}
792	>	TIBBCDField,       {ftFMTBcd}
793	>	nil,  {ftFixedWideChar}
794	>	TIBWideMemoField);   {ftWideMemo}
795	>	(*
796	>	TADTField,          { ftADT }
797	>	TArrayField,        { ftArray }
798	>	TReferenceField,    { ftReference }
799	>	TDataSetField,     { ftDataSet }
800	>	TBlobField,         { ftOraBlob }
801	>	TMemoField,         { ftOraClob }
802	>	TVariantField,      { ftVariant }
803	>	TInterfaceField,    { ftInterface }
804	>	TIDispatchField,     { ftIDispatch }
805	>	TGuidField);        { ftGuid } *)
806	>	(*var
807	>	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
808	>
809	>	implementation
810	>
811	>	uses IBIntf, Variants, FmtBCD, LazUTF8;
812	>
813	>	const FILE_BEGIN = 0;
814	>	FILE_CURRENT = 1;
815	>	FILE_END = 2;
816	>
817	>	type
818	>
819	>	TFieldNode = class(TObject)
820	>	protected
821	>	FieldName : String;
822	>	COMPUTED_BLR : Boolean;
823	>	DEFAULT_VALUE : boolean;
824	>	NextField : TFieldNode;
825	>	end;
826	>
827	>	TRelationNode = class(TObject)
828	>	protected
829	>	RelationName : String;
830	>	FieldNodes : TFieldNode;
831	>	NextRelation : TRelationNode;
832	>	end;
833	>
834	>	{Extended Field Def for character set info}
835	>
836	>	{ TIBFieldDef }
837	>
838	>	TIBFieldDef = class(TFieldDef)
839	>	private
840	>	FCharacterSetName: RawByteString;
841	>	FCharacterSetSize: integer;
842	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
843	>	FCodePage: TSystemCodePage;
844	>	{$ENDIF}
845	>	published
846	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
847	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
848	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
849	>	property CodePage: TSystemCodePage read FCodePage write FCodePage;
850	>	{$ENDIF}
851	>	end;
852	>
853	>
854	>	{  Copied from LCLProc in order to avoid LCL dependency
855	>
856	>	Ensures the covenient look of multiline string
857	>	when displaying it in the single line
858	>	* Replaces CR and LF with spaces
859	>	* Removes duplicate spaces
860	>	}
861	>	function TextToSingleLine(const AText: string): string;
862	>	var
863	>	str: string;
864	>	i, wstart, wlen: Integer;
865	>	begin
866	>	str := Trim(AText);
867	>	wstart := 0;
868	>	wlen := 0;
869	>	i := 1;
870	>	while i < Length(str) - 1 do
871	>	begin
872	>	if (str[i] in [' ', #13, #10]) then
873	>	begin
874	>	if (wstart = 0) then
875	>	begin
876	>	wstart := i;
877	>	wlen := 1;
878	>	end else
879	>	Inc(wlen);
880	>	end else
881	>	begin
882	>	if wstart > 0 then
883	>	begin
884	>	str[wstart] := ' ';
885	>	Delete(str, wstart+1, wlen-1);
886	>	Dec(i, wlen-1);
887	>	wstart := 0;
888	>	end;
889	>	end;
890	>	Inc(i);
891	>	end;
892	>	Result := str;
893	>	end;
894	>
895	>	{ TIBWideMemoField }
896	>
897	>	function TIBWideMemoField.GetTruncatedText: string;
898	>	begin
899	>	Result := GetAsString;
900	>
901	>	if Result <> '' then
902	>	if DisplayWidth = 0 then
903	>	Result := TextToSingleLine(Result)
904	>	else
905	>	if Length(Result) > DisplayWidth then {Show truncation with elipses}
906	>	Result := TextToSingleLine(system.copy(Result,1,DisplayWidth-3)) + '...';
907	>	end;
908	>
909	>	function TIBWideMemoField.GetDefaultWidth: Longint;
910	>	begin
911	>	Result := 128;
912	>	end;
913	>
914	>	procedure TIBWideMemoField.GetText(var AText: string; ADisplayText: Boolean);
915	>	begin
916	>	if ADisplayText then
917	>	begin
918	>	if not DisplayTextAsClassName and (CharacterSetName<> '') then
919	>	AText := GetTruncatedText
920	>	else
921	>	inherited GetText(AText, ADisplayText);
922	>	end
923	>	else
924	>	AText := GetAsString;
925	>	end;
926	>
927	>	constructor TIBWideMemoField.Create(AOwner: TComponent);
928	>	begin
929	>	inherited Create(AOwner);
930	>	BlobType := ftWideMemo;
931	>	end;
932	>
933	>	{ TIBMemoField }
934	>
935	>	function TIBMemoField.GetTruncatedText: string;
936	>	begin
937	>	Result := GetAsString;
938	>
939	>	if Result <> '' then
940	>	begin
941	>	case CharacterSetSize of
942	>	1:
943	>	if DisplayWidth = 0 then
944	>	Result := TextToSingleLine(Result)
945	>	else
946	>	if Length(Result) > DisplayWidth then {Show truncation with elipses}
947	>	Result := TextToSingleLine(system.copy(Result,1,DisplayWidth-3)) + '...';
948	>
949	>	{2: case 2 ignored. This should be handled by TIBWideMemo}
950	>
951	>	3, {Assume UNICODE_FSS is really UTF8}
952	>	4: {Include GB18030 - assuming UTF8 routine work for this codeset}
953	>	if DisplayWidth = 0 then
954	>	Result := ValidUTF8String(TextToSingleLine(Result))
955	>	else
956	>	if UTF8Length(Result) > DisplayWidth then {Show truncation with elipses}
957	>	Result := ValidUTF8String(TextToSingleLine(UTF8Copy(Result,1,DisplayWidth-3))) + '...';
958	>	end;
959	>	end
960	>	end;
961	>
962	>	function TIBMemoField.GetAsString: string;
963	>	var s: RawByteString;
964	>	begin
965	>	s := inherited GetAsString;
966	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
967	>	SetCodePage(s,CodePage,false);
968	>	{$ENDIF}
969	>	Result := s;
970	>	end;
971	>
972	>	function TIBMemoField.GetDefaultWidth: Longint;
973	>	begin
974	>	if DisplayTextAsClassName then
975	>	Result := inherited
976	>	else
977	>	Result := 128;
978	>	end;
979	>
980	>	procedure TIBMemoField.GetText(var AText: string; ADisplayText: Boolean);
981	>	begin
982	>	if ADisplayText then
983	>	begin
984	>	if not DisplayTextAsClassName and (CharacterSetName <> '') then
985	>	AText := GetTruncatedText
986	>	else
987	>	inherited GetText(AText, ADisplayText);
988	>	end
989	>	else
990	>	AText := GetAsString;
991	>	end;
992	>
993	>	procedure TIBMemoField.SetAsString(const AValue: string);
994	>	var s: RawByteString;
995	>	begin
996	>	s := AValue;
997	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
998	>	if StringCodePage(Value) <> CodePage then
999	>	SetCodePage(s,CodePage,true);
1000	>	{$ENDIF}
1001	>	inherited SetAsString(s);
1002	>	end;
1003	>
1004	>	constructor TIBMemoField.Create(AOwner: TComponent);
1005	>	begin
1006	>	inherited Create(AOwner);
1007	>	BlobType := ftMemo;
1008	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1009	>	FCodePage := CP_NONE;
1010	>	{$ENDIF}
1011	>	end;
1012	>
1013	>	{ TIBControlLink }
1014	>
1015	>	destructor TIBControlLink.Destroy;
1016	>	begin
1017	>	IBDataSet := nil;
1018	>	inherited Destroy;
1019	>	end;
1020	>
1021	>	procedure TIBControlLink.UpdateParams(Sender: TObject);
1022	>	begin
1023	>
1024	>	end;
1025	>
1026	>	procedure TIBControlLink.UpdateSQL(Sender: TObject);
1027	>	begin
1028	>
1029	>	end;
1030	>
1031	>	procedure TIBControlLink.SetIBDataSet(AValue: TIBCustomDataSet);
1032	>	begin
1033	>	if FTIBDataSet = AValue then Exit;
1034	>	if IBDataSet <> nil then
1035	>	IBDataSet.UnRegisterIBLink(self);
1036	>	FTIBDataSet := AValue;
1037	>	if IBDataSet <> nil then
1038	>	IBDataSet.RegisterIBLink(self);
1039	>	end;
1040	>
1041	>
1042	>	{ TIBStringField}
1043	>
1044	>	function TIBStringField.GetDefaultWidth: Longint;
1045	>	begin
1046	>	Result := Size div CharacterSetSize;
1047	>	end;
1048	>
1049	>	constructor TIBStringField.Create(aOwner: TComponent);
1050	>	begin
1051	>	inherited Create(aOwner);
1052	>	FCharacterSetSize := 1;
1053	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1054	>	FCodePage := CP_NONE;
1055	>	{$ENDIF}
1056	>	end;
1057	>
1058	>	class procedure TIBStringField.CheckTypeSize(Value: Integer);
1059	>	begin
1060	>	{ don't check string size. all sizes valid }
1061	>	end;
1062	>
1063	>	function TIBStringField.GetAsString: string;
1064	>	begin
1065	>	if not GetValue(Result) then Result := '';
1066	>	end;
1067	>
1068	>	function TIBStringField.GetAsVariant: Variant;
1069	>	var
1070	>	S: string;
1071	>	begin
1072	>	if GetValue(S) then Result := S else Result := Null;
1073	>	end;
1074	>
1075	>	function TIBStringField.GetValue(var Value: string): Boolean;
1076	>	var
1077	>	Buffer: PChar;
1078	>	s: RawByteString;
1079	>	begin
1080	>	Buffer := nil;
1081	>	IBAlloc(Buffer, 0, Size + 1);
1082	>	try
1083	>	Result := GetData(Buffer);
1084	>	if Result then
1085	>	begin
1086	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1087	>	s := string(Buffer);
1088	>	SetCodePage(s,CodePage,false);
1089	>	Value := s;
1090	>	//      writeln(FieldName,': ', StringCodePage(Value),', ',Value);
1091	>	{$ELSE}
1092	>	Value := string(Buffer);
1093	>	{$ENDIF}
1094	>	if Transliterate and (Value <> '') then
1095	>	DataSet.Translate(PChar(Value), PChar(Value), False);
1096	>	end
1097	>	finally
1098	>	FreeMem(Buffer);
1099	>	end;
1100	>	end;
1101	>
1102	>	procedure TIBStringField.SetAsString(const Value: string);
1103	>	var
1104	>	Buffer: PChar;
1105	>	s: RawByteString;
1106	>	begin
1107	>	Buffer := nil;
1108	>	IBAlloc(Buffer, 0, Size + 1);
1109	>	try
1110	>	s := Value;
1111	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1112	>	if StringCodePage(s) <> CodePage then
1113	>	SetCodePage(s,CodePage,true);
1114	>	{$ENDIF}
1115	>	StrLCopy(Buffer, PChar(s), Size);
1116	>	if Transliterate then
1117	>	DataSet.Translate(Buffer, Buffer, True);
1118	>	SetData(Buffer);
1119	>	finally
1120	>	FreeMem(Buffer);
1121	>	end;
1122	>	end;
1123	>
1124	>
1125	>	{ TIBBCDField }
1126	>
1127	>	constructor TIBBCDField.Create(AOwner: TComponent);
1128	>	begin
1129	>	inherited Create(AOwner);
1130	>	SetDataType(ftBCD);
1131	>	Size := 8;
1132	>	end;
1133	>
1134	>	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
1135	>	begin
1136	>	{ No need to check as the base type is currency, not BCD }
1137	>	end;
1138	>
1139	>	function TIBBCDField.GetAsCurrency: Currency;
1140	>	begin
1141	>	if not GetValue(Result) then
1142	>	Result := 0;
1143	>	end;
1144	>
1145	>	function TIBBCDField.GetAsString: string;
1146	>	var
1147	>	C: System.Currency;
1148	>	begin
1149	>	if GetValue(C) then
1150	>	Result := CurrToStr(C)
1151	>	else
1152	>	Result := '';
1153	>	end;
1154	>
1155	>	function TIBBCDField.GetAsVariant: Variant;
1156	>	var
1157	>	C: System.Currency;
1158	>	begin
1159	>	if GetValue(C) then
1160	>	Result := C
1161	>	else
1162	>	Result := Null;
1163	>	end;
1164	>
1165	>	function TIBBCDField.GetDataSize: Integer;
1166	>	begin
1167	>	{$IFDEF TBCDFIELD_IS_BCD}
1168	>	Result := 8;
1169	>	{$ELSE}
1170	>	Result := inherited GetDataSize
1171	>	{$ENDIF}
1172	>	end;
1173	>
1174	>	{ TIBDataLink }
1175	>
1176	>	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
1177	>	begin
1178	>	inherited Create;
1179	>	FDataSet := ADataSet;
1180	>	end;
1181	>
1182	>	destructor TIBDataLink.Destroy;
1183	>	begin
1184	>	FDataSet.FDataLink := nil;
1185	>	inherited Destroy;
1186	>	end;
1187	>
1188	>
1189	>	procedure TIBDataLink.ActiveChanged;
1190	>	begin
1191	>	if FDataSet.Active then
1192	>	FDataSet.RefreshParams;
1193	>	end;
1194	>
1195	>
1196	>	function TIBDataLink.GetDetailDataSet: TDataSet;
1197	>	begin
1198	>	Result := FDataSet;
1199	>	end;
1200	>
1201	>	procedure TIBDataLink.RecordChanged(Field: TField);
1202	>	begin
1203	>	if (Field = nil) and FDataSet.Active then
1204	>	FDataSet.RefreshParams;
1205	>	end;
1206	>
1207	>	procedure TIBDataLink.CheckBrowseMode;
1208	>	begin
1209	>	if FDataSet.Active then
1210	>	FDataSet.CheckBrowseMode;
1211	>	end;
1212	>
1213	>	{ TIBCustomDataSet }
1214	>
1215	>	constructor TIBCustomDataSet.Create(AOwner: TComponent);
1216	>	begin
1217	>	inherited Create(AOwner);
1218	>	FIBLoaded := False;
1219	>	CheckIBLoaded;
1220	>	FIBLoaded := True;
1221	>	FBase := TIBBase.Create(Self);
1222	>	FIBLinks := TList.Create;
1223	>	FCurrentRecord := -1;
1224	>	FDeletedRecords := 0;
1225	>	FUniDirectional := False;
1226	>	FBufferChunks := BufferCacheSize;
1227	>	FBlobStreamList := TList.Create;
1228	>	FGeneratorField := TIBGenerator.Create(self);
1229	>	FDataLink := TIBDataLink.Create(Self);
1230	>	FQDelete := TIBSQL.Create(Self);
1231	>	FQDelete.OnSQLChanging := SQLChanging;
1232	>	FQDelete.GoToFirstRecordOnExecute := False;
1233	>	FQInsert := TIBSQL.Create(Self);
1234	>	FQInsert.OnSQLChanging := SQLChanging;
1235	>	FQInsert.GoToFirstRecordOnExecute := False;
1236	>	FQRefresh := TIBSQL.Create(Self);
1237	>	FQRefresh.OnSQLChanging := SQLChanging;
1238	>	FQRefresh.GoToFirstRecordOnExecute := False;
1239	>	FQSelect := TIBSQL.Create(Self);
1240	>	FQSelect.OnSQLChanging := SQLChanging;
1241	>	FQSelect.OnSQLChanged := SQLChanged;
1242	>	FQSelect.GoToFirstRecordOnExecute := False;
1243	>	FQModify := TIBSQL.Create(Self);
1244	>	FQModify.OnSQLChanging := SQLChanging;
1245	>	FQModify.GoToFirstRecordOnExecute := False;
1246	>	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
1247	>	FParamCheck := True;
1248	>	FGenerateParamNames := False;
1249	>	FForcedRefresh := False;
1250	>	FAutoCommit:= acDisabled;
1251	>	FDataSetCloseAction := dcDiscardChanges;
1252	>	{Bookmark Size is Integer for IBX}
1253	>	BookmarkSize := SizeOf(Integer);
1254	>	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
1255	>	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
1256	>	FBase.OnDatabaseFree := DoDatabaseFree;
1257	>	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
1258	>	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
1259	>	FBase.OnTransactionFree := DoTransactionFree;
1260	>	if AOwner is TIBDatabase then
1261	>	Database := TIBDatabase(AOwner)
1262	>	else
1263	>	if AOwner is TIBTransaction then
1264	>	Transaction := TIBTransaction(AOwner);
1265	>	FBaseSQLSelect := TStringList.Create;
1266	>	end;
1267	>
1268	>	destructor TIBCustomDataSet.Destroy;
1269	>	begin
1270	>	if Active then Active := false;
1271	>	if FIBLoaded then
1272	>	begin
1273	>	if assigned(FGeneratorField) then FGeneratorField.Free;
1274	>	FDataLink.Free;
1275	>	FBase.Free;
1276	>	ClearBlobCache;
1277	>	ClearIBLinks;
1278	>	FIBLinks.Free;
1279	>	FBlobStreamList.Free;
1280	>	FreeMem(FBufferCache);
1281	>	FBufferCache := nil;
1282	>	FreeMem(FOldBufferCache);
1283	>	FOldBufferCache := nil;
1284	>	FCacheSize := 0;
1285	>	FOldCacheSize := 0;
1286	>	FMappedFieldPosition := nil;
1287	>	end;
1288	>	if assigned(FBaseSQLSelect) then FBaseSQLSelect.Free;
1289	>	if assigned(FParser) then FParser.Free;
1290	>	inherited Destroy;
1291	>	end;
1292	>
1293	>	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
1294	>	TGetResult;
1295	>	begin
1296	>	while not IsVisible(Buffer) do
1297	>	begin
1298	>	if GetMode = gmPrior then
1299	>	begin
1300	>	Dec(FCurrentRecord);
1301	>	if FCurrentRecord = -1 then
1302	>	begin
1303	>	result := grBOF;
1304	>	exit;
1305	>	end;
1306	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1307	>	end
1308	>	else begin
1309	>	Inc(FCurrentRecord);
1310	>	if (FCurrentRecord = FRecordCount) then
1311	>	begin
1312	>	if (not FQSelect.EOF) and (FQSelect.Next <> nil) then
1313	>	begin
1314	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
1315	>	Inc(FRecordCount);
1316	>	end
1317	>	else begin
1318	>	result := grEOF;
1319	>	exit;
1320	>	end;
1321	>	end
1322	>	else
1323	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1324	>	end;
1325	>	end;
1326	>	result := grOK;
1327	>	end;
1328	>
1329	>	procedure TIBCustomDataSet.ApplyUpdates;
1330	>	var
1331	>	{$IFDEF NEW_TBOOKMARK }
1332	>	CurBookmark: TBookmark;
1333	>	{$ELSE}
1334	>	CurBookmark: string;
1335	>	{$ENDIF}
1336	>	Buffer: PRecordData;
1337	>	CurUpdateTypes: TIBUpdateRecordTypes;
1338	>	UpdateAction: TIBUpdateAction;
1339	>	UpdateKind: TUpdateKind;
1340	>	bRecordsSkipped: Boolean;
1341	>
1342	>	procedure GetUpdateKind;
1343	>	begin
1344	>	case Buffer^.rdCachedUpdateStatus of
1345	>	cusModified:
1346	>	UpdateKind := ukModify;
1347	>	cusInserted:
1348	>	UpdateKind := ukInsert;
1349	>	else
1350	>	UpdateKind := ukDelete;
1351	>	end;
1352	>	end;
1353	>
1354	>	procedure ResetBufferUpdateStatus;
1355	>	begin
1356	>	case Buffer^.rdCachedUpdateStatus of
1357	>	cusModified:
1358	>	begin
1359	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1360	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1361	>	end;
1362	>	cusInserted:
1363	>	begin
1364	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1365	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1366	>	end;
1367	>	cusDeleted:
1368	>	begin
1369	>	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
1370	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1371	>	end;
1372	>	end;
1373	>	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
1374	>	end;
1375	>
1376	>	procedure UpdateUsingOnUpdateRecord;
1377	>	begin
1378	>	UpdateAction := uaFail;
1379	>	try
1380	>	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
1381	>	except
1382	>	on E: Exception do
1383	>	begin
1384	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1385	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1386	>	if UpdateAction = uaFail then
1387	>	raise;
1388	>	end;
1389	>	end;
1390	>	end;
1391	>
1392	>	procedure UpdateUsingUpdateObject;
1393	>	begin
1394	>	try
1395	>	FUpdateObject.Apply(UpdateKind,PChar(Buffer));
1396	>	ResetBufferUpdateStatus;
1397	>	except
1398	>	on E: Exception do
1399	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1400	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1401	>	end;
1402	>	end;
1403	>
1404	>	procedure UpdateUsingInternalquery;
1405	>	begin
1406	>	try
1407	>	case Buffer^.rdCachedUpdateStatus of
1408	>	cusModified:
1409	>	InternalPostRecord(FQModify, Buffer);
1410	>	cusInserted:
1411	>	InternalPostRecord(FQInsert, Buffer);
1412	>	cusDeleted:
1413	>	InternalDeleteRecord(FQDelete, Buffer);
1414	>	end;
1415	>	except
1416	>	on E: EIBError do begin
1417	>	UpdateAction := uaFail;
1418	>	if Assigned(FOnUpdateError) then
1419	>	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
1420	>	case UpdateAction of
1421	>	uaFail: raise;
1422	>	uaAbort: SysUtils.Abort;
1423	>	uaSkip: bRecordsSkipped := True;
1424	>	end;
1425	>	end;
1426	>	end;
1427	>	end;
1428	>
1429	>	begin
1430	>	if State in [dsEdit, dsInsert] then
1431	>	Post;
1432	>	FBase.CheckDatabase;
1433	>	FBase.CheckTransaction;
1434	>	DisableControls;
1435	>	CurBookmark := Bookmark;
1436	>	CurUpdateTypes := FUpdateRecordTypes;
1437	>	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1438	>	try
1439	>	First;
1440	>	bRecordsSkipped := False;
1441	>	while not EOF do
1442	>	begin
1443	>	Buffer := PRecordData(GetActiveBuf);
1444	>	GetUpdateKind;
1445	>	UpdateAction := uaApply;
1446	>	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
1447	>	begin
1448	>	if (Assigned(FOnUpdateRecord)) then
1449	>	UpdateUsingOnUpdateRecord
1450	>	else
1451	>	if Assigned(FUpdateObject) then
1452	>	UpdateUsingUpdateObject;
1453	>	case UpdateAction of
1454	>	uaFail:
1455	>	IBError(ibxeUserAbort, [nil]);
1456	>	uaAbort:
1457	>	SysUtils.Abort;
1458	>	uaApplied:
1459	>	ResetBufferUpdateStatus;
1460	>	uaSkip:
1461	>	bRecordsSkipped := True;
1462	>	uaRetry:
1463	>	Continue;
1464	>	end;
1465	>	end;
1466	>	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
1467	>	begin
1468	>	UpdateUsingInternalquery;
1469	>	UpdateAction := uaApplied;
1470	>	end;
1471	>	Next;
1472	>	end;
1473	>	FUpdatesPending := bRecordsSkipped;
1474	>	finally
1475	>	FUpdateRecordTypes := CurUpdateTypes;
1476	>	Bookmark := CurBookmark;
1477	>	EnableControls;
1478	>	end;
1479	>	end;
1480	>
1481	>	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1482	>	begin
1483	>	FQSelect.BatchInput(InputObject);
1484	>	end;
1485	>
1486	>	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1487	>	var
1488	>	Qry: TIBSQL;
1489	>	begin
1490	>	Qry := TIBSQL.Create(Self);
1491	>	try
1492	>	Qry.Database := FBase.Database;
1493	>	Qry.Transaction := FBase.Transaction;
1494	>	Qry.SQL.Assign(FQSelect.SQL);
1495	>	Qry.BatchOutput(OutputObject);
1496	>	finally
1497	>	Qry.Free;
1498	>	end;
1499	>	end;
1500	>
1501	>	procedure TIBCustomDataSet.CancelUpdates;
1502	>	var
1503	>	CurUpdateTypes: TIBUpdateRecordTypes;
1504	>	begin
1505	>	if State in [dsEdit, dsInsert] then
1506	>	Post;
1507	>	if FCachedUpdates and FUpdatesPending then
1508	>	begin
1509	>	DisableControls;
1510	>	CurUpdateTypes := UpdateRecordTypes;
1511	>	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1512	>	try
1513	>	First;
1514	>	while not EOF do
1515	>	begin
1516	>	if UpdateStatus = usInserted then
1517	>	RevertRecord
1518	>	else
1519	>	begin
1520	>	RevertRecord;
1521	>	Next;
1522	>	end;
1523	>	end;
1524	>	finally
1525	>	UpdateRecordTypes := CurUpdateTypes;
1526	>	First;
1527	>	FUpdatesPending := False;
1528	>	EnableControls;
1529	>	end;
1530	>	end;
1531	>	end;
1532	>
1533	>	function TIBCustomDataSet.GetFieldPosition(AliasName: string): integer;
1534	>	var i: integer;
1535	>	Prepared: boolean;
1536	>	begin
1537	>	Result := 0;
1538	>	Prepared := FInternalPrepared;
1539	>	if not Prepared then
1540	>	InternalPrepare;
1541	>	try
1542	>	for i := 0 to Length(FAliasNameList) - 1 do
1543	>	if FAliasNameList[i] = AliasName then
1544	>	begin
1545	>	Result := i + 1;
1546	>	Exit
1547	>	end;
1548	>	finally
1549	>	if not Prepared then
1550	>	InternalUnPrepare;
1551	>	end;
1552	>	end;
1553	>
1554	>	procedure TIBCustomDataSet.ActivateConnection;
1555	>	begin
1556	>	if not Assigned(Database) then
1557	>	IBError(ibxeDatabaseNotAssigned, [nil]);
1558	>	if not Assigned(Transaction) then
1559	>	IBError(ibxeTransactionNotAssigned, [nil]);
1560	>	if not Database.Connected then Database.Open;
1561	>	end;
1562	>
1563	>	function TIBCustomDataSet.ActivateTransaction: Boolean;
1564	>	begin
1565	>	Result := False;
1566	>	if not Assigned(Transaction) then
1567	>	IBError(ibxeTransactionNotAssigned, [nil]);
1568	>	if not Transaction.Active then
1569	>	begin
1570	>	Result := True;
1571	>	Transaction.StartTransaction;
1572	>	FDidActivate := True;
1573	>	end;
1574	>	end;
1575	>
1576	>	procedure TIBCustomDataSet.DeactivateTransaction;
1577	>	var
1578	>	i: Integer;
1579	>	begin
1580	>	if not Assigned(Transaction) then
1581	>	IBError(ibxeTransactionNotAssigned, [nil]);
1582	>	with Transaction do
1583	>	begin
1584	>	for i := 0 to SQLObjectCount - 1 do
1585	>	begin
1586	>	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1587	>	begin
1588	>	if TDataSet(SQLObjects[i].owner).Active then
1589	>	begin
1590	>	FDidActivate := False;
1591	>	exit;
1592	>	end;
1593	>	end;
1594	>	end;
1595	>	end;
1596	>	FInternalPrepared := False;
1597	>	if Transaction.InTransaction then
1598	>	Transaction.Commit;
1599	>	FDidActivate := False;
1600	>	end;
1601	>
1602	>	procedure TIBCustomDataSet.CheckDatasetClosed;
1603	>	begin
1604	>	if FOpen then
1605	>	IBError(ibxeDatasetOpen, [nil]);
1606	>	end;
1607	>
1608	>	procedure TIBCustomDataSet.CheckDatasetOpen;
1609	>	begin
1610	>	if not FOpen then
1611	>	IBError(ibxeDatasetClosed, [nil]);
1612	>	end;
1613	>
1614	>	function TIBCustomDataSet.CreateParser: TSelectSQLParser;
1615	>	begin
1616	>	Result := TSelectSQLParser.Create(self,FBaseSQLSelect);
1617	>	Result.OnSQLChanging := SQLChanging
1618	>	end;
1619	>
1620	>	procedure TIBCustomDataSet.CheckNotUniDirectional;
1621	>	begin
1622	>	if UniDirectional then
1623	>	IBError(ibxeDataSetUniDirectional, [nil]);
1624	>	end;
1625	>
1626	>	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1627	>	begin
1628	>	with PRecordData(Buffer)^ do
1629	>	if (State = dsInsert) and (not Modified) then
1630	>	begin
1631	>	rdRecordNumber := FRecordCount;
1632	>	FCurrentRecord := FRecordCount;
1633	>	end;
1634	>	end;
1635	>
1636	>	function TIBCustomDataSet.CanEdit: Boolean;
1637	>	var
1638	>	Buff: PRecordData;
1639	>	begin
1640	>	Buff := PRecordData(GetActiveBuf);
1641	>	result := (FQModify.SQL.Text <> '') or
1642	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1643	>	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1644	>	(FCachedUpdates));
1645	>	end;
1646	>
1647	>	function TIBCustomDataSet.CanInsert: Boolean;
1648	>	begin
1649	>	result := (FQInsert.SQL.Text <> '') or
1650	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1651	>	end;
1652	>
1653	>	function TIBCustomDataSet.CanDelete: Boolean;
1654	>	begin
1655	>	if (FQDelete.SQL.Text <> '') or
1656	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1657	>	result := True
1658	>	else
1659	>	result := False;
1660	>	end;
1661	>
1662	>	function TIBCustomDataSet.CanRefresh: Boolean;
1663	>	begin
1664	>	result := (FQRefresh.SQL.Text <> '') or
1665	>	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1666	>	end;
1667	>
1668	>	procedure TIBCustomDataSet.CheckEditState;
1669	>	begin
1670	>	case State of
1671	>	{ Check all the wsEditMode types }
1672	>	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1673	>	dsNewValue, dsInternalCalc :
1674	>	begin
1675	>	if (State in [dsEdit]) and (not CanEdit) then
1676	>	IBError(ibxeCannotUpdate, [nil]);
1677	>	if (State in [dsInsert]) and (not CanInsert) then
1678	>	IBError(ibxeCannotInsert, [nil]);
1679	>	end;
1680	>	else
1681	>	IBError(ibxeNotEditing, [])
1682	>	end;
1683	>	end;
1684	>
1685	>	procedure TIBCustomDataSet.ClearBlobCache;
1686	>	var
1687	>	i: Integer;
1688	>	begin
1689	>	for i := 0 to FBlobStreamList.Count - 1 do
1690	>	begin
1691	>	TIBBlobStream(FBlobStreamList[i]).Free;
1692	>	FBlobStreamList[i] := nil;
1693	>	end;
1694	>	FBlobStreamList.Pack;
1695	>	end;
1696	>
1697	>	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1698	>	begin
1699	>	Move(Source^, Dest^, FRecordBufferSize);
1700	>	end;
1701	>
1702	>	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1703	>	begin
1704	>	if Active then
1705	>	Active := False;
1706	>	FInternalPrepared := False;
1707	>	if Assigned(FBeforeDatabaseDisconnect) then
1708	>	FBeforeDatabaseDisconnect(Sender);
1709	>	end;
1710	>
1711	>	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1712	>	begin
1713	>	if Assigned(FAfterDatabaseDisconnect) then
1714	>	FAfterDatabaseDisconnect(Sender);
1715	>	end;
1716	>
1717	>	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1718	>	begin
1719	>	if Assigned(FDatabaseFree) then
1720	>	FDatabaseFree(Sender);
1721	>	end;
1722	>
1723	>	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject;
1724	>	Action: TTransactionAction);
1725	>	begin
1726	>	FCloseAction := Action;
1727	>	FInTransactionEnd := true;
1728	>	try
1729	>	if Active then
1730	>	Active := False;
1731	>	finally
1732	>	FInTransactionEnd := false;
1733	>	end;
1734	>	if FQSelect <> nil then
1735	>	FQSelect.FreeHandle;
1736	>	if FQDelete <> nil then
1737	>	FQDelete.FreeHandle;
1738	>	if FQInsert <> nil then
1739	>	FQInsert.FreeHandle;
1740	>	if FQModify <> nil then
1741	>	FQModify.FreeHandle;
1742	>	if FQRefresh <> nil then
1743	>	FQRefresh.FreeHandle;
1744	>	if Assigned(FBeforeTransactionEnd) then
1745	>	FBeforeTransactionEnd(Sender);
1746	>	end;
1747	>
1748	>	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1749	>	begin
1750	>	if Assigned(FAfterTransactionEnd) then
1751	>	FAfterTransactionEnd(Sender);
1752	>	end;
1753	>
1754	>	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1755	>	begin
1756	>	if Assigned(FTransactionFree) then
1757	>	FTransactionFree(Sender);
1758	>	end;
1759	>
1760	>	{ Read the record from FQSelect.Current into the record buffer
1761	>	Then write the buffer to in memory cache }
1762	>	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
1763	>	RecordNumber: Integer; Buffer: PChar);
1764	>	var
1765	>	p: PRecordData;
1766	>	pbd: PBlobDataArray;
1767	>	i, j: Integer;
1768	>	LocalData: Pointer;
1769	>	LocalDate, LocalDouble: Double;
1770	>	LocalInt: Integer;
1771	>	LocalBool: wordBool;
1772	>	LocalInt64: Int64;
1773	>	LocalCurrency: Currency;
1774	>	FieldsLoaded: Integer;
1775	>	temp: TIBXSQLVAR;
1776	>	begin
1777	>	p := PRecordData(Buffer);
1778	>	{ Make sure blob cache is empty }
1779	>	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
1780	>	if RecordNumber > -1 then
1781	>	for i := 0 to BlobFieldCount - 1 do
1782	>	pbd^[i] := nil;
1783	>	{ Get record information }
1784	>	p^.rdBookmarkFlag := bfCurrent;
1785	>	p^.rdFieldCount := Qry.Current.Count;
1786	>	p^.rdRecordNumber := RecordNumber;
1787	>	p^.rdUpdateStatus := usUnmodified;
1788	>	p^.rdCachedUpdateStatus := cusUnmodified;
1789	>	p^.rdSavedOffset := $FFFFFFFF;
1790	>
1791	>	{ Load up the fields }
1792	>	FieldsLoaded := FQSelect.Current.Count;
1793	>	j := 1;
1794	>	for i := 0 to Qry.Current.Count - 1 do
1795	>	begin
1796	>	if (Qry = FQSelect) then
1797	>	j := i + 1
1798	>	else begin
1799	>	if FieldsLoaded = 0 then
1800	>	break;
1801	>	j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1;
1802	>	if j < 1 then
1803	>	continue
1804	>	else
1805	>	Dec(FieldsLoaded);
1806	>	end;
1807	>	with FQSelect.Current[j - 1].Data^ do
1808	>	if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
1809	>	begin
1810	>	if sqllen <= 8 then
1811	>	p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^;
1812	>	continue;
1813	>	end;
1814	>	if j > 0 then with p^ do
1815	>	begin
1816	>	rdFields[j].fdDataType :=
1817	>	Qry.Current[i].Data^.sqltype and (not 1);
1818	>	rdFields[j].fdDataScale :=
1819	>	Qry.Current[i].Data^.sqlscale;
1820	>	rdFields[j].fdNullable :=
1821	>	(Qry.Current[i].Data^.sqltype and 1 = 1);
1822	>	rdFields[j].fdIsNull :=
1823	>	(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1));
1824	>	LocalData := Qry.Current[i].Data^.sqldata;
1825	>	case rdFields[j].fdDataType of
1826	>	SQL_TIMESTAMP:
1827	>	begin
1828	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1829	>	if RecordNumber >= 0 then
1830	>	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime));
1831	>	LocalData := PChar(@LocalDate);
1832	>	end;
1833	>	SQL_TYPE_DATE:
1834	>	begin
1835	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1836	>	if RecordNumber >= 0 then
1837	>	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date;
1838	>	LocalData := PChar(@LocalInt);
1839	>	end;
1840	>	SQL_TYPE_TIME:
1841	>	begin
1842	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1843	>	if RecordNumber >= 0 then
1844	>	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time;
1845	>	LocalData := PChar(@LocalInt);
1846	>	end;
1847	>	SQL_SHORT, SQL_LONG:
1848	>	begin
1849	>	if (rdFields[j].fdDataScale = 0) then
1850	>	begin
1851	>	rdFields[j].fdDataSize := SizeOf(Integer);
1852	>	if RecordNumber >= 0 then
1853	>	LocalInt := Qry.Current[i].AsLong;
1854	>	LocalData := PChar(@LocalInt);
1855	>	end
1856	>	else if (rdFields[j].fdDataScale >= (-4)) then
1857	>	begin
1858	>	rdFields[j].fdDataSize := SizeOf(Currency);
1859	>	if RecordNumber >= 0 then
1860	>	LocalCurrency := Qry.Current[i].AsCurrency;
1861	>	LocalData := PChar(@LocalCurrency);
1862	>	end
1863	>	else begin
1864	>	rdFields[j].fdDataSize := SizeOf(Double);
1865	>	if RecordNumber >= 0 then
1866	>	LocalDouble := Qry.Current[i].AsDouble;
1867	>	LocalData := PChar(@LocalDouble);
1868	>	end;
1869	>	end;
1870	>	SQL_INT64:
1871	>	begin
1872	>	if (rdFields[j].fdDataScale = 0) then
1873	>	begin
1874	>	rdFields[j].fdDataSize := SizeOf(Int64);
1875	>	if RecordNumber >= 0 then
1876	>	LocalInt64 := Qry.Current[i].AsInt64;
1877	>	LocalData := PChar(@LocalInt64);
1878	>	end
1879	>	else if (rdFields[j].fdDataScale >= (-4)) then
1880	>	begin
1881	>	rdFields[j].fdDataSize := SizeOf(Currency);
1882	>	if RecordNumber >= 0 then
1883	>	LocalCurrency := Qry.Current[i].AsCurrency;
1884	>	LocalData := PChar(@LocalCurrency);
1885	>	end
1886	>	else begin
1887	>	rdFields[j].fdDataSize := SizeOf(Double);
1888	>	if RecordNumber >= 0 then
1889	>	LocalDouble := Qry.Current[i].AsDouble;
1890	>	LocalData := PChar(@LocalDouble);
1891	>	end
1892	>	end;
1893	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
1894	>	begin
1895	>	rdFields[j].fdDataSize := SizeOf(Double);
1896	>	if RecordNumber >= 0 then
1897	>	LocalDouble := Qry.Current[i].AsDouble;
1898	>	LocalData := PChar(@LocalDouble);
1899	>	end;
1900	>	SQL_VARYING:
1901	>	begin
1902	>	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1903	>	rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2);
1904	>	if RecordNumber >= 0 then
1905	>	begin
1906	>	if (rdFields[j].fdDataLength = 0) then
1907	>	LocalData := nil
1908	>	else
1909	>	begin
1910	>	temp :=  Qry.Current[i];
1911	>	LocalData := @temp.Data^.sqldata[2];
1912	>	(*              LocalData := @Qry.Current[i].Data^.sqldata[2];*)
1913	>	end;
1914	>	end;
1915	>	end;
1916	>	SQL_BOOLEAN:
1917	>	begin
1918	>	LocalBool:= false;
1919	>	rdFields[j].fdDataSize := SizeOf(wordBool);
1920	>	if RecordNumber >= 0 then
1921	>	LocalBool := Qry.Current[i].AsBoolean;
1922	>	LocalData := PChar(@LocalBool);
1923	>	end;
1924	>	else { SQL_TEXT, SQL_BLOB, SQL_ARRAY, SQL_QUAD }
1925	>	begin
1926	>	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1927	>	if (rdFields[j].fdDataType = SQL_TEXT) then
1928	>	rdFields[j].fdDataLength := rdFields[j].fdDataSize;
1929	>	end;
1930	>	end;
1931	>	if RecordNumber < 0 then
1932	>	begin
1933	>	rdFields[j].fdIsNull := True;
1934	>	rdFields[j].fdDataOfs := FRecordSize;
1935	>	Inc(FRecordSize, rdFields[j].fdDataSize);
1936	>	end
1937	>	else begin
1938	>	if rdFields[j].fdDataType = SQL_VARYING then
1939	>	begin
1940	>	if LocalData <> nil then
1941	>	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength)
1942	>	end
1943	>	else
1944	>	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize)
1945	>	end;
1946	>	end;
1947	>	end;
1948	>	WriteRecordCache(RecordNumber, PChar(p));
1949	>	end;
1950	>
1951	>	function TIBCustomDataSet.GetActiveBuf: PChar;
1952	>	begin
1953	>	case State of
1954	>	dsBrowse:
1955	>	if IsEmpty then
1956	>	result := nil
1957	>	else
1958	>	result := ActiveBuffer;
1959	>	dsEdit, dsInsert:
1960	>	result := ActiveBuffer;
1961	>	dsCalcFields:
1962	>	result := CalcBuffer;
1963	>	dsFilter:
1964	>	result := FFilterBuffer;
1965	>	dsNewValue:
1966	>	result := ActiveBuffer;
1967	>	dsOldValue:
1968	>	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
1969	>	PRecordData(FOldBuffer)^.rdRecordNumber) then
1970	>	result := FOldBuffer
1971	>	else
1972	>	result := ActiveBuffer;
1973	>	else if not FOpen then
1974	>	result := nil
1975	>	else
1976	>	result := ActiveBuffer;
1977	>	end;
1978	>	end;
1979	>
1980	>	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
1981	>	begin
1982	>	if Active then
1983	>	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
1984	>	else
1985	>	result := cusUnmodified;
1986	>	end;
1987	>
1988	>	function TIBCustomDataSet.GetDatabase: TIBDatabase;
1989	>	begin
1990	>	result := FBase.Database;
1991	>	end;
1992	>
1993	>	function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE;
1994	>	begin
1995	>	result := FBase.DBHandle;
1996	>	end;
1997	>
1998	>	function TIBCustomDataSet.GetDeleteSQL: TStrings;
1999	>	begin
2000	>	result := FQDelete.SQL;
2001	>	end;
2002	>
2003	>	function TIBCustomDataSet.GetInsertSQL: TStrings;
2004	>	begin
2005	>	result := FQInsert.SQL;
2006	>	end;
2007	>
2008	>	function TIBCustomDataSet.GetSQLParams: TIBXSQLDA;
2009	>	begin
2010	>	if not FInternalPrepared then
2011	>	InternalPrepare;
2012	>	result := FQSelect.Params;
2013	>	end;
2014	>
2015	>	function TIBCustomDataSet.GetRefreshSQL: TStrings;
2016	>	begin
2017	>	result := FQRefresh.SQL;
2018	>	end;
2019	>
2020	>	function TIBCustomDataSet.GetSelectSQL: TStrings;
2021	>	begin
2022	>	result := FQSelect.SQL;
2023	>	end;
2024	>
2025	>	function TIBCustomDataSet.GetStatementType: TIBSQLTypes;
2026	>	begin
2027	>	result := FQSelect.SQLType;
2028	>	end;
2029	>
2030	>	function TIBCustomDataSet.GetModifySQL: TStrings;
2031	>	begin
2032	>	result := FQModify.SQL;
2033	>	end;
2034	>
2035	>	function TIBCustomDataSet.GetTransaction: TIBTransaction;
2036	>	begin
2037	>	result := FBase.Transaction;
2038	>	end;
2039	>
2040	>	function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE;
2041	>	begin
2042	>	result := FBase.TRHandle;
2043	>	end;
2044	>
2045	>	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
2046	>	begin
2047	>	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
2048	>	FUpdateObject.Apply(ukDelete,Buff)
2049	>	else
2050	>	begin
2051	>	SetInternalSQLParams(FQDelete, Buff);
2052	>	FQDelete.ExecQuery;
2053	>	end;
2054	>	with PRecordData(Buff)^ do
2055	>	begin
2056	>	rdUpdateStatus := usDeleted;
2057	>	rdCachedUpdateStatus := cusUnmodified;
2058	>	end;
2059	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2060	>	end;
2061	>
2062	>	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
2063	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
2064	>	var
2065	>	keyFieldList: TList;
2066	>	{$IFDEF NEW_TBOOKMARK }
2067	>	CurBookmark: TBookmark;
2068	>	{$ELSE}
2069	>	CurBookmark: string;
2070	>	{$ENDIF}
2071	>	fieldValue: Variant;
2072	>	lookupValues: array of variant;
2073	>	i, fieldCount: Integer;
2074	>	fieldValueAsString: string;
2075	>	lookupValueAsString: string;
2076	>	begin
2077	>	keyFieldList := TList.Create;
2078	>	try
2079	>	GetFieldList(keyFieldList, KeyFields);
2080	>	fieldCount := keyFieldList.Count;
2081	>	CurBookmark := Bookmark;
2082	>	result := false;
2083	>	SetLength(lookupValues, fieldCount);
2084	>	if not EOF then
2085	>	begin
2086	>	for i := 0 to fieldCount - 1 do  {expand key values into lookupValues array}
2087	>	begin
2088	>	if VarIsArray(KeyValues) then
2089	>	lookupValues[i] := KeyValues[i]
2090	>	else
2091	>	if i > 0 then
2092	>	lookupValues[i] := NULL
2093	>	else
2094	>	lookupValues[0] := KeyValues;
2095	>
2096	>	{convert to upper case is case insensitive search}
2097	>	if (TField(keyFieldList[i]).DataType = ftString) and
2098	>	not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
2099	>	lookupValues[i] := UpperCase(lookupValues[i]);
2100	>	end;
2101	>	end;
2102	>	while not result and not EOF do   {search for a matching record}
2103	>	begin
2104	>	i := 0;
2105	>	result := true;
2106	>	while result and (i < fieldCount) do
2107	>	{see if all of the key fields matches}
2108	>	begin
2109	>	fieldValue := TField(keyFieldList[i]).Value;
2110	>	result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
2111	>	if result and not VarIsNull(fieldValue) then
2112	>	begin
2113	>	try
2114	>	if TField(keyFieldList[i]).DataType = ftString then
2115	>	begin
2116	>	{strings need special handling because of the locate options that
2117	>	apply to them}
2118	>	fieldValueAsString := TField(keyFieldList[i]).AsString;
2119	>	lookupValueAsString := lookupValues[i];
2120	>	if (loCaseInsensitive in Options) then
2121	>	fieldValueAsString := UpperCase(fieldValueAsString);
2122	>
2123	>	if (loPartialKey in Options) then
2124	>	result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
2125	>	else
2126	>	result := result and (fieldValueAsString = lookupValueAsString);
2127	>	end
2128	>	else
2129	>	result := result and (lookupValues[i] =
2130	>	VarAsType(fieldValue, VarType(lookupValues[i])));
2131	>	except on EVariantError do
2132	>	result := False;
2133	>	end;
2134	>	end;
2135	>	Inc(i);
2136	>	end;
2137	>	if not result then
2138	>	Next;
2139	>	end;
2140	>	if not result then
2141	>	Bookmark := CurBookmark
2142	>	else
2143	>	CursorPosChanged;
2144	>	finally
2145	>	keyFieldList.Free;
2146	>	SetLength(lookupValues,0)
2147	>	end;
2148	>	end;
2149	>
2150	>	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
2151	>	var
2152	>	i, j, k: Integer;
2153	>	pbd: PBlobDataArray;
2154	>	begin
2155	>	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
2156	>	j := 0;
2157	>	for i := 0 to FieldCount - 1 do
2158	>	if Fields[i].IsBlob then
2159	>	begin
2160	>	k := FMappedFieldPosition[Fields[i].FieldNo -1];
2161	>	if pbd^[j] <> nil then
2162	>	begin
2163	>	pbd^[j].Finalize;
2164	>	PISC_QUAD(
2165	>	PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ :=
2166	>	pbd^[j].BlobID;
2167	>	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
2168	>	end;
2169	>	Inc(j);
2170	>	end;
2171	>	if Assigned(FUpdateObject) then
2172	>	begin
2173	>	if (Qry = FQDelete) then
2174	>	FUpdateObject.Apply(ukDelete,Buff)
2175	>	else if (Qry = FQInsert) then
2176	>	FUpdateObject.Apply(ukInsert,Buff)
2177	>	else
2178	>	FUpdateObject.Apply(ukModify,Buff);
2179	>	end
2180	>	else begin
2181	>	SetInternalSQLParams(Qry, Buff);
2182	>	Qry.ExecQuery;
2183	>	end;
2184	>	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
2185	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2186	>	SetModified(False);
2187	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2188	>	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
2189	>	InternalRefreshRow;
2190	>	end;
2191	>
2192	>	procedure TIBCustomDataSet.InternalRefreshRow;
2193	>	var
2194	>	Buff: PChar;
2195	>	ofs: DWORD;
2196	>	Qry: TIBSQL;
2197	>	begin
2198	>	FBase.SetCursor;
2199	>	try
2200	>	Buff := GetActiveBuf;
2201	>	if CanRefresh then
2202	>	begin
2203	>	if Buff <> nil then
2204	>	begin
2205	>	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
2206	>	begin
2207	>	Qry := TIBSQL.Create(self);
2208	>	Qry.Database := Database;
2209	>	Qry.Transaction := Transaction;
2210	>	Qry.GoToFirstRecordOnExecute := False;
2211	>	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
2212	>	end
2213	>	else
2214	>	Qry := FQRefresh;
2215	>	SetInternalSQLParams(Qry, Buff);
2216	>	Qry.ExecQuery;
2217	>	try
2218	>	if (Qry.SQLType = SQLExecProcedure) or
2219	>	(Qry.Next <> nil) then
2220	>	begin
2221	>	ofs := PRecordData(Buff)^.rdSavedOffset;
2222	>	FetchCurrentRecordToBuffer(Qry,
2223	>	PRecordData(Buff)^.rdRecordNumber,
2224	>	Buff);
2225	>	if FCachedUpdates and (ofs <> $FFFFFFFF) then
2226	>	begin
2227	>	PRecordData(Buff)^.rdSavedOffset := ofs;
2228	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2229	>	SaveOldBuffer(Buff);
2230	>	end;
2231	>	end;
2232	>	finally
2233	>	Qry.Close;
2234	>	end;
2235	>	if Qry <> FQRefresh then
2236	>	Qry.Free;
2237	>	end
2238	>	end
2239	>	else
2240	>	IBError(ibxeCannotRefresh, [nil]);
2241	>	finally
2242	>	FBase.RestoreCursor;
2243	>	end;
2244	>	end;
2245	>
2246	>	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
2247	>	var
2248	>	NewBuffer, OldBuffer: PRecordData;
2249	>
2250	>	begin
2251	>	NewBuffer := nil;
2252	>	OldBuffer := nil;
2253	>	NewBuffer := PRecordData(AllocRecordBuffer);
2254	>	OldBuffer := PRecordData(AllocRecordBuffer);
2255	>	try
2256	>	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
2257	>	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
2258	>	case NewBuffer^.rdCachedUpdateStatus of
2259	>	cusInserted:
2260	>	begin
2261	>	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
2262	>	Inc(FDeletedRecords);
2263	>	end;
2264	>	cusModified,
2265	>	cusDeleted:
2266	>	begin
2267	>	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
2268	>	Dec(FDeletedRecords);
2269	>	CopyRecordBuffer(OldBuffer, NewBuffer);
2270	>	end;
2271	>	end;
2272	>
2273	>	if State in dsEditModes then
2274	>	Cancel;
2275	>
2276	>	WriteRecordCache(RecordNumber, PChar(NewBuffer));
2277	>
2278	>	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
2279	>	ReSync([]);
2280	>	finally
2281	>	FreeRecordBuffer(PChar(NewBuffer));
2282	>	FreeRecordBuffer(PChar(OldBuffer));
2283	>	end;
2284	>	end;
2285	>
2286	>	{ A visible record is one that is not truly deleted,
2287	>	and it is also listed in the FUpdateRecordTypes set }
2288	>
2289	>	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
2290	>	begin
2291	>	result := True;
2292	>	if not (State = dsOldValue) then
2293	>	result :=
2294	>	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
2295	>	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
2296	>	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
2297	>	end;
2298	>
2299	>
2300	>	function TIBCustomDataSet.LocateNext(const KeyFields: string;
2301	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
2302	>	begin
2303	>	DisableControls;
2304	>	try
2305	>	result := InternalLocate(KeyFields, KeyValues, Options);
2306	>	finally
2307	>	EnableControls;
2308	>	end;
2309	>	end;
2310	>
2311	>	procedure TIBCustomDataSet.InternalPrepare;
2312	>	var
2313	>	DidActivate: Boolean;
2314	>	begin
2315	>	if FInternalPrepared then
2316	>	Exit;
2317	>	DidActivate := False;
2318	>	FBase.SetCursor;
2319	>	try
2320	>	ActivateConnection;
2321	>	DidActivate := ActivateTransaction;
2322	>	FBase.CheckDatabase;
2323	>	FBase.CheckTransaction;
2324	>	if HasParser and (FParser.SQLText <> FQSelect.SQL.Text) then
2325	>	begin
2326	>	FQSelect.OnSQLChanged := nil; {Do not react to change}
2327	>	try
2328	>	FQSelect.SQL.Text := FParser.SQLText;
2329	>	finally
2330	>	FQSelect.OnSQLChanged := SQLChanged;
2331	>	end;
2332	>	end;
2333	>	//   writeln( FQSelect.SQL.Text);
2334	>	if FQSelect.SQL.Text <> '' then
2335	>	begin
2336	>	if not FQSelect.Prepared then
2337	>	begin
2338	>	FQSelect.GenerateParamNames := FGenerateParamNames;
2339	>	FQSelect.ParamCheck := ParamCheck;
2340	>	FQSelect.Prepare;
2341	>	end;
2342	>	FQDelete.GenerateParamNames := FGenerateParamNames;
2343	>	if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
2344	>	FQDelete.Prepare;
2345	>	FQInsert.GenerateParamNames := FGenerateParamNames;
2346	>	if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
2347	>	FQInsert.Prepare;
2348	>	FQRefresh.GenerateParamNames := FGenerateParamNames;
2349	>	if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
2350	>	FQRefresh.Prepare;
2351	>	FQModify.GenerateParamNames := FGenerateParamNames;
2352	>	if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
2353	>	FQModify.Prepare;
2354	>	FInternalPrepared := True;
2355	>	InternalInitFieldDefs;
2356	>	end else
2357	>	IBError(ibxeEmptyQuery, [nil]);
2358	>	finally
2359	>	if DidActivate then
2360	>	DeactivateTransaction;
2361	>	FBase.RestoreCursor;
2362	>	end;
2363	>	end;
2364	>
2365	>	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
2366	>	begin
2367	>	SetModified(Value);
2368	>	end;
2369	>
2370	>	procedure TIBCustomDataSet.RevertRecord;
2371	>	var
2372	>	Buff: PRecordData;
2373	>	begin
2374	>	if FCachedUpdates and FUpdatesPending then
2375	>	begin
2376	>	Buff := PRecordData(GetActiveBuf);
2377	>	InternalRevertRecord(Buff^.rdRecordNumber);
2378	>	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
2379	>	DataEvent(deRecordChange, 0);
2380	>	end;
2381	>	end;
2382	>
2383	>	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
2384	>	var
2385	>	OldBuffer: Pointer;
2386	>	procedure CopyOldBuffer;
2387	>	begin
2388	>	CopyRecordBuffer(Buffer, OldBuffer);
2389	>	if BlobFieldCount > 0 then
2390	>	FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream),
2391	>	0);
2392	>	end;
2393	>
2394	>	begin
2395	>	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
2396	>	begin
2397	>	OldBuffer := AllocRecordBuffer;
2398	>	try
2399	>	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
2400	>	begin
2401	>	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
2402	>	FILE_END);
2403	>	CopyOldBuffer;
2404	>	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
2405	>	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
2406	>	FILE_BEGIN, Buffer);
2407	>	end
2408	>	else begin
2409	>	CopyOldBuffer;
2410	>	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2411	>	OldBuffer);
2412	>	end;
2413	>	finally
2414	>	FreeRecordBuffer(PChar(OldBuffer));
2415	>	end;
2416	>	end;
2417	>	end;
2418	>
2419	>	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
2420	>	begin
2421	>	if (Value <= 0) then
2422	>	FBufferChunks := BufferCacheSize
2423	>	else
2424	>	FBufferChunks := Value;
2425	>	end;
2426	>
2427	>	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
2428	>	begin
2429	>	if (FBase.Database <> Value) then
2430	>	begin
2431	>	CheckDatasetClosed;
2432	>	FBase.Database := Value;
2433	>	FQDelete.Database := Value;
2434	>	FQInsert.Database := Value;
2435	>	FQRefresh.Database := Value;
2436	>	FQSelect.Database := Value;
2437	>	FQModify.Database := Value;
2438	>	end;
2439	>	end;
2440	>
2441	>	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
2442	>	begin
2443	>	if FQDelete.SQL.Text <> Value.Text then
2444	>	begin
2445	>	Disconnect;
2446	>	FQDelete.SQL.Assign(Value);
2447	>	end;
2448	>	end;
2449	>
2450	>	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
2451	>	begin
2452	>	if FQInsert.SQL.Text <> Value.Text then
2453	>	begin
2454	>	Disconnect;
2455	>	FQInsert.SQL.Assign(Value);
2456	>	end;
2457	>	end;
2458	>
2459	>	procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
2460	>	var
2461	>	i, j: Integer;
2462	>	cr, data: PChar;
2463	>	fn, st: string;
2464	>	OldBuffer: Pointer;
2465	>	ts: TTimeStamp;
2466	>	begin
2467	>	if (Buffer = nil) then
2468	>	IBError(ibxeBufferNotSet, [nil]);
2469	>	if (not FInternalPrepared) then
2470	>	InternalPrepare;
2471	>	OldBuffer := nil;
2472	>	try
2473	>	for i := 0 to Qry.Params.Count - 1 do
2474	>	begin
2475	>	fn := Qry.Params[i].Name;
2476	>	if (Pos('OLD_', fn) = 1) then {mbcs ok}
2477	>	begin
2478	>	fn := Copy(fn, 5, Length(fn));
2479	>	if not Assigned(OldBuffer) then
2480	>	begin
2481	>	OldBuffer := AllocRecordBuffer;
2482	>	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
2483	>	end;
2484	>	cr := OldBuffer;
2485	>	end
2486	>	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
2487	>	begin
2488	>	fn := Copy(fn, 5, Length(fn));
2489	>	cr := Buffer;
2490	>	end
2491	>	else
2492	>	cr := Buffer;
2493	>	j := FQSelect.FieldIndex[fn] + 1;
2494	>	if (j > 0) then
2495	>	with PRecordData(cr)^ do
2496	>	begin
2497	>	if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize}
2498	>	begin
2499	>	PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey;
2500	>	continue;
2501	>	end;
2502	>	if rdFields[j].fdIsNull then
2503	>	Qry.Params[i].IsNull := True
2504	>	else begin
2505	>	Qry.Params[i].IsNull := False;
2506	>	data := cr + rdFields[j].fdDataOfs;
2507	>	case rdFields[j].fdDataType of
2508	>	SQL_TEXT, SQL_VARYING:
2509	>	begin
2510	>	SetString(st, data, rdFields[j].fdDataLength);
2511	>	Qry.Params[i].AsString := st;
2512	>	end;
2513	>	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
2514	>	Qry.Params[i].AsDouble := PDouble(data)^;
2515	>	SQL_SHORT, SQL_LONG:
2516	>	begin
2517	>	if rdFields[j].fdDataScale = 0 then
2518	>	Qry.Params[i].AsLong := PLong(data)^
2519	>	else if rdFields[j].fdDataScale >= (-4) then
2520	>	Qry.Params[i].AsCurrency := PCurrency(data)^
2521	>	else
2522	>	Qry.Params[i].AsDouble := PDouble(data)^;
2523	>	end;
2524	>	SQL_INT64:
2525	>	begin
2526	>	if rdFields[j].fdDataScale = 0 then
2527	>	Qry.Params[i].AsInt64 := PInt64(data)^
2528	>	else if rdFields[j].fdDataScale >= (-4) then
2529	>	Qry.Params[i].AsCurrency := PCurrency(data)^
2530	>	else
2531	>	Qry.Params[i].AsDouble := PDouble(data)^;
2532	>	end;
2533	>	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
2534	>	Qry.Params[i].AsQuad := PISC_QUAD(data)^;
2535	>	SQL_TYPE_DATE:
2536	>	begin
2537	>	ts.Date := PInt(data)^;
2538	>	ts.Time := 0;
2539	>	Qry.Params[i].AsDate :=
2540	>	TimeStampToDateTime(ts);
2541	>	end;
2542	>	SQL_TYPE_TIME:
2543	>	begin
2544	>	ts.Date := 0;
2545	>	ts.Time := PInt(data)^;
2546	>	Qry.Params[i].AsTime :=
2547	>	TimeStampToDateTime(ts);
2548	>	end;
2549	>	SQL_TIMESTAMP:
2550	>	Qry.Params[i].AsDateTime :=
2551	>	TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^)));
2552	>	SQL_BOOLEAN:
2553	>	Qry.Params[i].AsBoolean := PWordBool(data)^;
2554	>	end;
2555	>	end;
2556	>	end;
2557	>	end;
2558	>	finally
2559	>	if (OldBuffer <> nil) then
2560	>	FreeRecordBuffer(PChar(OldBuffer));
2561	>	end;
2562	>	end;
2563	>
2564	>	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2565	>	begin
2566	>	if FQRefresh.SQL.Text <> Value.Text then
2567	>	begin
2568	>	Disconnect;
2569	>	FQRefresh.SQL.Assign(Value);
2570	>	end;
2571	>	end;
2572	>
2573	>	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2574	>	begin
2575	>	if FQSelect.SQL.Text <> Value.Text then
2576	>	begin
2577	>	Disconnect;
2578	>	FQSelect.SQL.Assign(Value);
2579	>	end;
2580	>	end;
2581	>
2582	>	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2583	>	begin
2584	>	if FQModify.SQL.Text <> Value.Text then
2585	>	begin
2586	>	Disconnect;
2587	>	FQModify.SQL.Assign(Value);
2588	>	end;
2589	>	end;
2590	>
2591	>	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2592	>	begin
2593	>	if (FBase.Transaction <> Value) then
2594	>	begin
2595	>	CheckDatasetClosed;
2596	>	FBase.Transaction := Value;
2597	>	FQDelete.Transaction := Value;
2598	>	FQInsert.Transaction := Value;
2599	>	FQRefresh.Transaction := Value;
2600	>	FQSelect.Transaction := Value;
2601	>	FQModify.Transaction := Value;
2602	>	end;
2603	>	end;
2604	>
2605	>	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2606	>	begin
2607	>	CheckDatasetClosed;
2608	>	FUniDirectional := Value;
2609	>	end;
2610	>
2611	>	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2612	>	begin
2613	>	FUpdateRecordTypes := Value;
2614	>	if Active then
2615	>	First;
2616	>	end;
2617	>
2618	>	procedure TIBCustomDataSet.RefreshParams;
2619	>	var
2620	>	DataSet: TDataSet;
2621	>	begin
2622	>	DisableControls;
2623	>	try
2624	>	if FDataLink.DataSource <> nil then
2625	>	begin
2626	>	DataSet := FDataLink.DataSource.DataSet;
2627	>	if DataSet <> nil then
2628	>	if DataSet.Active and (DataSet.State <> dsSetKey) then
2629	>	begin
2630	>	Close;
2631	>	Open;
2632	>	end;
2633	>	end;
2634	>	finally
2635	>	EnableControls;
2636	>	end;
2637	>	end;
2638	>
2639	>	procedure TIBCustomDataSet.RegisterIBLink(Sender: TIBControlLink);
2640	>	begin
2641	>	if FIBLinks.IndexOf(Sender) = -1 then
2642	>	FIBLinks.Add(Sender);
2643	>	end;
2644	>
2645	>
2646	>	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2647	>	begin
2648	>	Active := false;
2649	>	{  if FOpen then
2650	>	InternalClose;}
2651	>	if FInternalPrepared then
2652	>	InternalUnPrepare;
2653	>	FieldDefs.Clear;
2654	>	FieldDefs.Updated := false;
2655	>	end;
2656	>
2657	>	procedure TIBCustomDataSet.SQLChanged(Sender: TObject);
2658	>	begin
2659	>	FBaseSQLSelect.assign(FQSelect.SQL);
2660	>	end;
2661	>
2662	>	{ I can "undelete" uninserted records (make them "inserted" again).
2663	>	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2664	>	procedure TIBCustomDataSet.Undelete;
2665	>	var
2666	>	Buff: PRecordData;
2667	>	begin
2668	>	CheckActive;
2669	>	Buff := PRecordData(GetActiveBuf);
2670	>	with Buff^ do
2671	>	begin
2672	>	if rdCachedUpdateStatus = cusUninserted then
2673	>	begin
2674	>	rdCachedUpdateStatus := cusInserted;
2675	>	Dec(FDeletedRecords);
2676	>	end
2677	>	else if (rdUpdateStatus = usDeleted) and
2678	>	(rdCachedUpdateStatus = cusDeleted) then
2679	>	begin
2680	>	rdCachedUpdateStatus := cusUnmodified;
2681	>	rdUpdateStatus := usUnmodified;
2682	>	Dec(FDeletedRecords);
2683	>	end;
2684	>	WriteRecordCache(rdRecordNumber, PChar(Buff));
2685	>	end;
2686	>	end;
2687	>
2688	>	procedure TIBCustomDataSet.UnRegisterIBLink(Sender: TIBControlLink);
2689	>	begin
2690	>	FIBLinks.Remove(Sender);
2691	>	end;
2692	>
2693	>	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2694	>	begin
2695	>	if Active then
2696	>	if GetActiveBuf <> nil then
2697	>	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2698	>	else
2699	>	result := usUnmodified
2700	>	else
2701	>	result := usUnmodified;
2702	>	end;
2703	>
2704	>	function TIBCustomDataSet.IsSequenced: Boolean;
2705	>	begin
2706	>	Result := Assigned( FQSelect ) and FQSelect.EOF;
2707	>	end;
2708	>
2709	>	function TIBCustomDataSet.ParamByName(ParamName: String): TIBXSQLVAR;
2710	>	begin
2711	>	ActivateConnection;
2712	>	ActivateTransaction;
2713	>	if not FInternalPrepared then
2714	>	InternalPrepare;
2715	>	Result := Params.ByName(ParamName);
2716	>	end;
2717	>
2718	>	{Beware: the parameter FCache is used as an identifier to determine which
2719	>	cache is being operated on and is not referenced in the computation.
2720	>	The result is an adjusted offset into the identified cache, either the
2721	>	Buffer Cache or the old Buffer Cache.}
2722	>
2723	>	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
2724	>	Origin: Integer): DWORD;
2725	>	var
2726	>	OldCacheSize: Integer;
2727	>	begin
2728	>	if (FCache = FBufferCache) then
2729	>	begin
2730	>	case Origin of
2731	>	FILE_BEGIN:    FBPos := Offset;
2732	>	FILE_CURRENT:  FBPos := FBPos + Offset;
2733	>	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
2734	>	end;
2735	>	OldCacheSize := FCacheSize;
2736	>	while (FBPos >= DWORD(FCacheSize)) do
2737	>	Inc(FCacheSize, FBufferChunkSize);
2738	>	if FCacheSize > OldCacheSize then
2739	>	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
2740	>	result := FBPos;
2741	>	end
2742	>	else begin
2743	>	case Origin of
2744	>	FILE_BEGIN:    FOBPos := Offset;
2745	>	FILE_CURRENT:  FOBPos := FOBPos + Offset;
2746	>	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
2747	>	end;
2748	>	OldCacheSize := FOldCacheSize;
2749	>	while (FBPos >= DWORD(FOldCacheSize)) do
2750	>	Inc(FOldCacheSize, FBufferChunkSize);
2751	>	if FOldCacheSize > OldCacheSize then
2752	>	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
2753	>	result := FOBPos;
2754	>	end;
2755	>	end;
2756	>
2757	>	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2758	>	Buffer: PChar);
2759	>	var
2760	>	pCache: PChar;
2761	>	AdjustedOffset: DWORD;
2762	>	bOld: Boolean;
2763	>	begin
2764	>	bOld := (FCache = FOldBufferCache);
2765	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2766	>	if not bOld then
2767	>	pCache := FBufferCache + AdjustedOffset
2768	>	else
2769	>	pCache := FOldBufferCache + AdjustedOffset;
2770	>	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
2771	>	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2772	>	end;
2773	>
2774	>	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
2775	>	ReadOldBuffer: Boolean);
2776	>	begin
2777	>	if FUniDirectional then
2778	>	RecordNumber := RecordNumber mod UniCache;
2779	>	if (ReadOldBuffer) then
2780	>	begin
2781	>	ReadRecordCache(RecordNumber, Buffer, False);
2782	>	if FCachedUpdates and
2783	>	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
2784	>	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2785	>	Buffer)
2786	>	else
2787	>	if ReadOldBuffer and
2788	>	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
2789	>	CopyRecordBuffer( FOldBuffer, Buffer )
2790	>	end
2791	>	else
2792	>	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2793	>	end;
2794	>
2795	>	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2796	>	Buffer: PChar);
2797	>	var
2798	>	pCache: PChar;
2799	>	AdjustedOffset: DWORD;
2800	>	bOld: Boolean;
2801	>	dwEnd: DWORD;
2802	>	begin
2803	>	bOld := (FCache = FOldBufferCache);
2804	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2805	>	if not bOld then
2806	>	pCache := FBufferCache + AdjustedOffset
2807	>	else
2808	>	pCache := FOldBufferCache + AdjustedOffset;
2809	>	Move(Buffer^, pCache^, FRecordBufferSize);
2810	>	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2811	>	if not bOld then
2812	>	begin
2813	>	if (dwEnd > FBEnd) then
2814	>	FBEnd := dwEnd;
2815	>	end
2816	>	else begin
2817	>	if (dwEnd > FOBEnd) then
2818	>	FOBEnd := dwEnd;
2819	>	end;
2820	>	end;
2821	>
2822	>	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
2823	>	begin
2824	>	if RecordNumber >= 0 then
2825	>	begin
2826	>	if FUniDirectional then
2827	>	RecordNumber := RecordNumber mod UniCache;
2828	>	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2829	>	end;
2830	>	end;
2831	>
2832	>	function TIBCustomDataSet.AllocRecordBuffer: PChar;
2833	>	begin
2834	>	result := nil;
2835	>	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
2836	>	Move(FModelBuffer^, result^, FRecordBufferSize);
2837	>	end;
2838	>
2839	>	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
2840	>	var
2841	>	pb: PBlobDataArray;
2842	>	fs: TIBBlobStream;
2843	>	Buff: PChar;
2844	>	bTr, bDB: Boolean;
2845	>	begin
2846	>	Buff := GetActiveBuf;
2847	>	if Buff = nil then
2848	>	begin
2849	>	fs := TIBBlobStream.Create;
2850	>	fs.Mode := bmReadWrite;
2851	>	FBlobStreamList.Add(Pointer(fs));
2852	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
2853	>	exit;
2854	>	end;
2855	>	pb := PBlobDataArray(Buff + FBlobCacheOffset);
2856	>	if pb^[Field.Offset] = nil then
2857	>	begin
2858	>	AdjustRecordOnInsert(Buff);
2859	>	pb^[Field.Offset] := TIBBlobStream.Create;
2860	>	fs := pb^[Field.Offset];
2861	>	FBlobStreamList.Add(Pointer(fs));
2862	>	fs.Mode := bmReadWrite;
2863	>	fs.Database := Database;
2864	>	fs.Transaction := Transaction;
2865	>	fs.BlobID :=
2866	>	PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
2867	>	if (CachedUpdates) then
2868	>	begin
2869	>	bTr := not Transaction.InTransaction;
2870	>	bDB := not Database.Connected;
2871	>	if bDB then
2872	>	Database.Open;
2873	>	if bTr then
2874	>	Transaction.StartTransaction;
2875	>	fs.Seek(0, soFromBeginning);
2876	>	if bTr then
2877	>	Transaction.Commit;
2878	>	if bDB then
2879	>	Database.Close;
2880	>	end;
2881	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
2882	>	end else
2883	>	fs := pb^[Field.Offset];
2884	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
2885	>	end;
2886	>
2887	>	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
2888	>	const
2889	>	CMPLess = -1;
2890	>	CMPEql  =  0;
2891	>	CMPGtr  =  1;
2892	>	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
2893	>	(CMPGtr, CMPEql));
2894	>	begin
2895	>	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
2896	>
2897	>	if Result = 2 then
2898	>	begin
2899	>	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
2900	>	Result := CMPLess
2901	>	else
2902	>	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
2903	>	Result := CMPGtr
2904	>	else
2905	>	Result := CMPEql;
2906	>	end;
2907	>	end;
2908	>
2909	>	procedure TIBCustomDataSet.DoBeforeDelete;
2910	>	var
2911	>	Buff: PRecordData;
2912	>	begin
2913	>	if not CanDelete then
2914	>	IBError(ibxeCannotDelete, [nil]);
2915	>	Buff := PRecordData(GetActiveBuf);
2916	>	if FCachedUpdates and
2917	>	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
2918	>	SaveOldBuffer(PChar(Buff));
2919	>	inherited DoBeforeDelete;
2920	>	end;
2921	>
2922	>	procedure TIBCustomDataSet.DoAfterDelete;
2923	>	begin
2924	>	inherited DoAfterDelete;
2925	>	FBase.DoAfterDelete(self);
2926	>	InternalAutoCommit;
2927	>	end;
2928	>
2929	>	procedure TIBCustomDataSet.DoBeforeEdit;
2930	>	var
2931	>	Buff: PRecordData;
2932	>	begin
2933	>	Buff := PRecordData(GetActiveBuf);
2934	>	if not(CanEdit or (FQModify.SQL.Count <> 0) or
2935	>	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
2936	>	IBError(ibxeCannotUpdate, [nil]);
2937	>	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
2938	>	SaveOldBuffer(PChar(Buff));
2939	>	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
2940	>	inherited DoBeforeEdit;
2941	>	end;
2942	>
2943	>	procedure TIBCustomDataSet.DoAfterEdit;
2944	>	begin
2945	>	inherited DoAfterEdit;
2946	>	FBase.DoAfterEdit(self);
2947	>	end;
2948	>
2949	>	procedure TIBCustomDataSet.DoBeforeInsert;
2950	>	begin
2951	>	if not CanInsert then
2952	>	IBError(ibxeCannotInsert, [nil]);
2953	>	inherited DoBeforeInsert;
2954	>	end;
2955	>
2956	>	procedure TIBCustomDataSet.DoAfterInsert;
2957	>	begin
2958	>	if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
2959	>	GeneratorField.Apply;
2960	>	inherited DoAfterInsert;
2961	>	FBase.DoAfterInsert(self);
2962	>	end;
2963	>
2964	>	procedure TIBCustomDataSet.DoBeforeClose;
2965	>	begin
2966	>	inherited DoBeforeClose;
2967	>	if State in [dsInsert,dsEdit] then
2968	>	begin
2969	>	if FInTransactionEnd and (FCloseAction = TARollback) then
2970	>	Exit;
2971	>
2972	>	if DataSetCloseAction = dcSaveChanges then
2973	>	Post;
2974	>	{Note this can fail with an exception e.g. due to
2975	>	database validation error. In which case the dataset remains open }
2976	>	end;
2977	>	end;
2978	>
2979	>	procedure TIBCustomDataSet.DoBeforeOpen;
2980	>	var i: integer;
2981	>	begin
2982	>	if assigned(FParser) then
2983	>	FParser.Reset;
2984	>	for i := 0 to FIBLinks.Count - 1 do
2985	>	TIBControlLink(FIBLinks[i]).UpdateSQL(self);
2986	>	inherited DoBeforeOpen;
2987	>	for i := 0 to FIBLinks.Count - 1 do
2988	>	TIBControlLink(FIBLinks[i]).UpdateParams(self);
2989	>	end;
2990	>
2991	>	procedure TIBCustomDataSet.DoBeforePost;
2992	>	begin
2993	>	inherited DoBeforePost;
2994	>	if (State = dsInsert) and
2995	>	(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
2996	>	GeneratorField.Apply
2997	>	end;
2998	>
2999	>	procedure TIBCustomDataSet.DoAfterPost;
3000	>	begin
3001	>	inherited DoAfterPost;
3002	>	FBase.DoAfterPost(self);
3003	>	InternalAutoCommit;
3004	>	end;
3005	>
3006	>	procedure TIBCustomDataSet.FetchAll;
3007	>	var
3008	>	{$IFDEF NEW_TBOOKMARK }
3009	>	CurBookmark: TBookmark;
3010	>	{$ELSE}
3011	>	CurBookmark: string;
3012	>	{$ENDIF}
3013	>	begin
3014	>	FBase.SetCursor;
3015	>	try
3016	>	if FQSelect.EOF or not FQSelect.Open then
3017	>	exit;
3018	>	DisableControls;
3019	>	try
3020	>	CurBookmark := Bookmark;
3021	>	Last;
3022	>	Bookmark := CurBookmark;
3023	>	finally
3024	>	EnableControls;
3025	>	end;
3026	>	finally
3027	>	FBase.RestoreCursor;
3028	>	end;
3029	>	end;
3030	>
3031	>	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
3032	>	begin
3033	>	FreeMem(Buffer);
3034	>	Buffer := nil;
3035	>	end;
3036	>
3037	>	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
3038	>	begin
3039	>	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
3040	>	end;
3041	>
3042	>	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
3043	>	begin
3044	>	result := PRecordData(Buffer)^.rdBookmarkFlag;
3045	>	end;
3046	>
3047	>	function TIBCustomDataSet.GetCanModify: Boolean;
3048	>	begin
3049	>	result := (FQInsert.SQL.Text <> '') or
3050	>	(FQModify.SQL.Text <> '') or
3051	>	(FQDelete.SQL.Text <> '') or
3052	>	(Assigned(FUpdateObject));
3053	>	end;
3054	>
3055	>	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
3056	>	begin
3057	>	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
3058	>	begin
3059	>	UpdateCursorPos;
3060	>	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
3061	>	result := True;
3062	>	end
3063	>	else
3064	>	result := False;
3065	>	end;
3066	>
3067	>	function TIBCustomDataSet.GetDataSource: TDataSource;
3068	>	begin
3069	>	if FDataLink = nil then
3070	>	result := nil
3071	>	else
3072	>	result := FDataLink.DataSource;
3073	>	end;
3074	>
3075	>	function TIBCustomDataSet.GetDBAliasName(FieldNo: integer): string;
3076	>	begin
3077	>	Result := FAliasNameMap[FieldNo-1]
3078	>	end;
3079	>
3080	>	function TIBCustomDataSet.GetFieldDefFromAlias(aliasName: string): TFieldDef;
3081	>	var
3082	>	i: integer;
3083	>	begin
3084	>	Result := nil;
3085	>	for i := 0 to Length(FAliasNameMap) - 1 do
3086	>	if FAliasNameMap[i] = aliasName then
3087	>	begin
3088	>	Result := FieldDefs[i];
3089	>	Exit
3090	>	end;
3091	>	end;
3092	>
3093	>	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
3094	>	begin
3095	>	Result := DefaultFieldClasses[FieldType];
3096	>	end;
3097	>
3098	>	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
3099	>	begin
3100	>	result := GetFieldData(FieldByNumber(FieldNo), buffer);
3101	>	end;
3102	>
3103	>	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
3104	>	var
3105	>	Buff, Data: PChar;
3106	>	CurrentRecord: PRecordData;
3107	>	begin
3108	>	result := False;
3109	>	Buff := GetActiveBuf;
3110	>	if (Buff = nil) or
3111	>	(not IsVisible(Buff)) or not assigned(Field.DataSet) then
3112	>	exit;
3113	>	{ The intention here is to stuff the buffer with the data for the
3114	>	referenced field for the current record }
3115	>	CurrentRecord := PRecordData(Buff);
3116	>	if (Field.FieldNo < 0) then
3117	>	begin
3118	>	Inc(Buff, FRecordSize + Field.Offset);
3119	>	result := Boolean(Buff[0]);
3120	>	if result and (Buffer <> nil) then
3121	>	Move(Buff[1], Buffer^, Field.DataSize);
3122	>	end
3123	>	else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
3124	>	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
3125	>	begin
3126	>	result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull;
3127	>	if result and (Buffer <> nil) then
3128	>	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do
3129	>	begin
3130	>	Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs;
3131	>	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
3132	>	begin
3133	>	if fdDataLength < Field.DataSize then
3134	>	begin
3135	>	Move(Data^, Buffer^, fdDataLength);
3136	>	PChar(Buffer)[fdDataLength] := #0;
3137	>	end
3138	>	else
3139	>	IBError(ibxeFieldSizeError,[Field.FieldName])
3140	>	end
3141	>	else
3142	>	Move(Data^, Buffer^, Field.DataSize);
3143	>	end;
3144	>	end;
3145	>	end;
3146	>
3147	>	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
3148	>	opposed to 0-based indexes.
3149	>	This is because we want LastRecordNumber/RecordCount = 1 }
3150	>
3151	>	function TIBCustomDataSet.GetRecNo: Integer;
3152	>	begin
3153	>	if GetActiveBuf = nil then
3154	>	result := 0
3155	>	else
3156	>	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
3157	>	end;
3158	>
3159	>	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
3160	>	DoCheck: Boolean): TGetResult;
3161	>	var
3162	>	Accept: Boolean;
3163	>	SaveState: TDataSetState;
3164	>	begin
3165	>	Result := grOK;
3166	>	if Filtered and Assigned(OnFilterRecord) then
3167	>	begin
3168	>	Accept := False;
3169	>	SaveState := SetTempState(dsFilter);
3170	>	while not Accept do
3171	>	begin
3172	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
3173	>	if Result <> grOK then
3174	>	break;
3175	>	FFilterBuffer := Buffer;
3176	>	try
3177	>	Accept := True;
3178	>	OnFilterRecord(Self, Accept);
3179	>	if not Accept and (GetMode = gmCurrent) then
3180	>	GetMode := gmPrior;
3181	>	except
3182	>	//        FBase.HandleException(Self);
3183	>	end;
3184	>	end;
3185	>	RestoreState(SaveState);
3186	>	end
3187	>	else
3188	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
3189	>	end;
3190	>
3191	>	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
3192	>	DoCheck: Boolean): TGetResult;
3193	>	begin
3194	>	result := grError;
3195	>	case GetMode of
3196	>	gmCurrent: begin
3197	>	if (FCurrentRecord >= 0) then begin
3198	>	if FCurrentRecord < FRecordCount then
3199	>	ReadRecordCache(FCurrentRecord, Buffer, False)
3200	>	else begin
3201	>	while (not FQSelect.EOF) and
3202	>	(FQSelect.Next <> nil) and
3203	>	(FCurrentRecord >= FRecordCount) do begin
3204	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3205	>	Inc(FRecordCount);
3206	>	end;
3207	>	FCurrentRecord := FRecordCount - 1;
3208	>	if (FCurrentRecord >= 0) then
3209	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3210	>	end;
3211	>	result := grOk;
3212	>	end else
3213	>	result := grBOF;
3214	>	end;
3215	>	gmNext: begin
3216	>	result := grOk;
3217	>	if FCurrentRecord = FRecordCount then
3218	>	result := grEOF
3219	>	else if FCurrentRecord = FRecordCount - 1 then begin
3220	>	if (not FQSelect.EOF) then begin
3221	>	FQSelect.Next;
3222	>	Inc(FCurrentRecord);
3223	>	end;
3224	>	if (FQSelect.EOF) then begin
3225	>	result := grEOF;
3226	>	end else begin
3227	>	Inc(FRecordCount);
3228	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
3229	>	end;
3230	>	end else if (FCurrentRecord < FRecordCount) then begin
3231	>	Inc(FCurrentRecord);
3232	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3233	>	end;
3234	>	end;
3235	>	else { gmPrior }
3236	>	begin
3237	>	if (FCurrentRecord = 0) then begin
3238	>	Dec(FCurrentRecord);
3239	>	result := grBOF;
3240	>	end else if (FCurrentRecord > 0) and
3241	>	(FCurrentRecord <= FRecordCount) then begin
3242	>	Dec(FCurrentRecord);
3243	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3244	>	result := grOk;
3245	>	end else if (FCurrentRecord = -1) then
3246	>	result := grBOF;
3247	>	end;
3248	>	end;
3249	>	if result = grOk then
3250	>	result := AdjustCurrentRecord(Buffer, GetMode);
3251	>	if result = grOk then with PRecordData(Buffer)^ do begin
3252	>	rdBookmarkFlag := bfCurrent;
3253	>	GetCalcFields(Buffer);
3254	>	end else if (result = grEOF) then begin
3255	>	CopyRecordBuffer(FModelBuffer, Buffer);
3256	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
3257	>	end else if (result = grBOF) then begin
3258	>	CopyRecordBuffer(FModelBuffer, Buffer);
3259	>	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
3260	>	end else if (result = grError) then begin
3261	>	CopyRecordBuffer(FModelBuffer, Buffer);
3262	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
3263	>	end;;
3264	>	end;
3265	>
3266	>	function TIBCustomDataSet.GetRecordCount: Integer;
3267	>	begin
3268	>	result := FRecordCount - FDeletedRecords;
3269	>	end;
3270	>
3271	>	function TIBCustomDataSet.GetRecordSize: Word;
3272	>	begin
3273	>	result := FRecordBufferSize;
3274	>	end;
3275	>
3276	>	procedure TIBCustomDataSet.InternalAutoCommit;
3277	>	begin
3278	>	with Transaction do
3279	>	if InTransaction and (FAutoCommit = acCommitRetaining) then
3280	>	begin
3281	>	if CachedUpdates then ApplyUpdates;
3282	>	CommitRetaining;
3283	>	end;
3284	>	end;
3285	>
3286	>	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
3287	>	begin
3288	>	CheckEditState;
3289	>	begin
3290	>	{ When adding records, we *always* append.
3291	>	Insertion is just too costly }
3292	>	AdjustRecordOnInsert(Buffer);
3293	>	with PRecordData(Buffer)^ do
3294	>	begin
3295	>	rdUpdateStatus := usInserted;
3296	>	rdCachedUpdateStatus := cusInserted;
3297	>	end;
3298	>	if not CachedUpdates then
3299	>	InternalPostRecord(FQInsert, Buffer)
3300	>	else begin
3301	>	WriteRecordCache(FCurrentRecord, Buffer);
3302	>	FUpdatesPending := True;
3303	>	end;
3304	>	Inc(FRecordCount);
3305	>	InternalSetToRecord(Buffer);
3306	>	end
3307	>	end;
3308	>
3309	>	procedure TIBCustomDataSet.InternalCancel;
3310	>	var
3311	>	Buff: PChar;
3312	>	CurRec: Integer;
3313	>	begin
3314	>	inherited InternalCancel;
3315	>	Buff := GetActiveBuf;
3316	>	if Buff <> nil then begin
3317	>	CurRec := FCurrentRecord;
3318	>	AdjustRecordOnInsert(Buff);
3319	>	if (State = dsEdit) then begin
3320	>	CopyRecordBuffer(FOldBuffer, Buff);
3321	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3322	>	end else begin
3323	>	CopyRecordBuffer(FModelBuffer, Buff);
3324	>	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
3325	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
3326	>	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
3327	>	FCurrentRecord := CurRec;
3328	>	end;
3329	>	end;
3330	>	end;
3331	>
3332	>
3333	>	procedure TIBCustomDataSet.InternalClose;
3334	>	begin
3335	>	if FDidActivate then
3336	>	DeactivateTransaction;
3337	>	FQSelect.Close;
3338	>	ClearBlobCache;
3339	>	FreeRecordBuffer(FModelBuffer);
3340	>	FreeRecordBuffer(FOldBuffer);
3341	>	FCurrentRecord := -1;
3342	>	FOpen := False;
3343	>	FRecordCount := 0;
3344	>	FDeletedRecords := 0;
3345	>	FRecordSize := 0;
3346	>	FBPos := 0;
3347	>	FOBPos := 0;
3348	>	FCacheSize := 0;
3349	>	FOldCacheSize := 0;
3350	>	FBEnd := 0;
3351	>	FOBEnd := 0;
3352	>	FreeMem(FBufferCache);
3353	>	FBufferCache := nil;
3354	>	FreeMem(FOldBufferCache);
3355	>	FOldBufferCache := nil;
3356	>	BindFields(False);
3357	>	ResetParser;
3358	>	if DefaultFields then DestroyFields;
3359	>	end;
3360	>
3361	>	procedure TIBCustomDataSet.InternalDelete;
3362	>	var
3363	>	Buff: PChar;
3364	>	begin
3365	>	FBase.SetCursor;
3366	>	try
3367	>	Buff := GetActiveBuf;
3368	>	if CanDelete then
3369	>	begin
3370	>	if not CachedUpdates then
3371	>	InternalDeleteRecord(FQDelete, Buff)
3372	>	else
3373	>	begin
3374	>	with PRecordData(Buff)^ do
3375	>	begin
3376	>	if rdCachedUpdateStatus = cusInserted then
3377	>	rdCachedUpdateStatus := cusUninserted
3378	>	else begin
3379	>	rdUpdateStatus := usDeleted;
3380	>	rdCachedUpdateStatus := cusDeleted;
3381	>	end;
3382	>	end;
3383	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3384	>	end;
3385	>	Inc(FDeletedRecords);
3386	>	FUpdatesPending := True;
3387	>	end else
3388	>	IBError(ibxeCannotDelete, [nil]);
3389	>	finally
3390	>	FBase.RestoreCursor;
3391	>	end;
3392	>	end;
3393	>
3394	>	procedure TIBCustomDataSet.InternalFirst;
3395	>	begin
3396	>	FCurrentRecord := -1;
3397	>	end;
3398	>
3399	>	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
3400	>	begin
3401	>	FCurrentRecord := PInteger(Bookmark)^;
3402	>	end;
3403	>
3404	>	procedure TIBCustomDataSet.InternalHandleException;
3405	>	begin
3406	>	FBase.HandleException(Self)
3407	>	end;
3408	>
3409	>	procedure TIBCustomDataSet.InternalInitFieldDefs;
3410	>	begin
3411	>	if not InternalPrepared then
3412	>	begin
3413	>	InternalPrepare;
3414	>	exit;
3415	>	end;
3416	>	FieldDefsFromQuery(FQSelect);
3417	>	end;
3418	>
3419	>	procedure TIBCustomDataSet.FieldDefsFromQuery(SourceQuery: TIBSQL);
3420	>	const
3421	>	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
3422	>	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
3423	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
3424	>	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
3425	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
3426	>	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
3427	>	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
3428	>	var
3429	>	FieldType: TFieldType;
3430	>	FieldSize: Word;
3431	>	charSetID: short;
3432	>	CharSetSize: integer;
3433	>	CharSetName: RawByteString;
3434	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3435	>	FieldCodePage: TSystemCodePage;
3436	>	{$ENDIF}
3437	>	FieldNullable : Boolean;
3438	>	i, FieldPosition, FieldPrecision: Integer;
3439	>	FieldAliasName, DBAliasName: string;
3440	>	RelationName, FieldName: string;
3441	>	Query : TIBSQL;
3442	>	FieldIndex: Integer;
3443	>	FRelationNodes : TRelationNode;
3444	>
3445	>	function Add_Node(Relation, Field : String) : TRelationNode;
3446	>	var
3447	>	FField : TFieldNode;
3448	>	begin
3449	>	if FRelationNodes.RelationName = '' then
3450	>	Result := FRelationNodes
3451	>	else
3452	>	begin
3453	>	Result := TRelationNode.Create;
3454	>	Result.NextRelation := FRelationNodes;
3455	>	end;
3456	>	Result.RelationName := Relation;
3457	>	FRelationNodes := Result;
3458	>	Query.Params[0].AsString := Relation;
3459	>	Query.ExecQuery;
3460	>	while not Query.Eof do
3461	>	begin
3462	>	FField := TFieldNode.Create;
3463	>	FField.FieldName := Query.Fields[2].AsString;
3464	>	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
3465	>	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
3466	>	FField.NextField := Result.FieldNodes;
3467	>	Result.FieldNodes := FField;
3468	>	Query.Next;
3469	>	end;
3470	>	Query.Close;
3471	>	end;
3472	>
3473	>	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
3474	>	var
3475	>	FRelation : TRelationNode;
3476	>	FField : TFieldNode;
3477	>	begin
3478	>	FRelation := FRelationNodes;
3479	>	while Assigned(FRelation) and
3480	>	(FRelation.RelationName <> Relation) do
3481	>	FRelation := FRelation.NextRelation;
3482	>	if not Assigned(FRelation) then
3483	>	FRelation := Add_Node(Relation, Field);
3484	>	Result := false;
3485	>	FField := FRelation.FieldNodes;
3486	>	while Assigned(FField) do
3487	>	if FField.FieldName = Field then
3488	>	begin
3489	>	Result := Ffield.COMPUTED_BLR;
3490	>	Exit;
3491	>	end
3492	>	else
3493	>	FField := Ffield.NextField;
3494	>	end;
3495	>
3496	>	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
3497	>	var
3498	>	FRelation : TRelationNode;
3499	>	FField : TFieldNode;
3500	>	begin
3501	>	FRelation := FRelationNodes;
3502	>	while Assigned(FRelation) and
3503	>	(FRelation.RelationName <> Relation) do
3504	>	FRelation := FRelation.NextRelation;
3505	>	if not Assigned(FRelation) then
3506	>	FRelation := Add_Node(Relation, Field);
3507	>	Result := false;
3508	>	FField := FRelation.FieldNodes;
3509	>	while Assigned(FField) do
3510	>	if FField.FieldName = Field then
3511	>	begin
3512	>	Result := Ffield.DEFAULT_VALUE;
3513	>	Exit;
3514	>	end
3515	>	else
3516	>	FField := Ffield.NextField;
3517	>	end;
3518	>
3519	>	Procedure FreeNodes;
3520	>	var
3521	>	FRelation : TRelationNode;
3522	>	FField : TFieldNode;
3523	>	begin
3524	>	while Assigned(FRelationNodes) do
3525	>	begin
3526	>	While Assigned(FRelationNodes.FieldNodes) do
3527	>	begin
3528	>	FField := FRelationNodes.FieldNodes.NextField;
3529	>	FRelationNodes.FieldNodes.Free;
3530	>	FRelationNodes.FieldNodes := FField;
3531	>	end;
3532	>	FRelation := FRelationNodes.NextRelation;
3533	>	FRelationNodes.Free;
3534	>	FRelationNodes := FRelation;
3535	>	end;
3536	>	end;
3537	>
3538	>	begin
3539	>	FRelationNodes := TRelationNode.Create;
3540	>	FNeedsRefresh := False;
3541	>	Database.InternalTransaction.StartTransaction;
3542	>	Query := TIBSQL.Create(self);
3543	>	try
3544	>	Query.Database := DataBase;
3545	>	Query.Transaction := Database.InternalTransaction;
3546	>	FieldDefs.BeginUpdate;
3547	>	FieldDefs.Clear;
3548	>	FieldIndex := 0;
3549	>	if (Length(FMappedFieldPosition) < SourceQuery.Current.Count) then
3550	>	SetLength(FMappedFieldPosition, SourceQuery.Current.Count);
3551	>	Query.SQL.Text := DefaultSQL;
3552	>	Query.Prepare;
3553	>	SetLength(FAliasNameMap, SourceQuery.Current.Count);
3554	>	SetLength(FAliasNameList, SourceQuery.Current.Count);
3555	>	for i := 0 to SourceQuery.Current.Count - 1 do
3556	>	with SourceQuery.Current[i].Data^ do
3557	>	begin
3558	>	{ Get the field name }
3559	>	FieldAliasName := SourceQuery.Current[i].Name;
3560	>	SetString(DBAliasName, aliasname, aliasname_length);
3561	>	SetString(RelationName, relname, relname_length);
3562	>	SetString(FieldName, sqlname, sqlname_length);
3563	>	FAliasNameList[i] := DBAliasName;
3564	>	FieldSize := 0;
3565	>	FieldPrecision := 0;
3566	>	FieldNullable := SourceQuery.Current[i].IsNullable;
3567	>	CharSetSize := 0;
3568	>	CharSetName := '';
3569	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3570	>	FieldCodePage := CP_NONE;
3571	>	{$ENDIF}
3572	>	case sqltype and not 1 of
3573	>	{ All VARCHAR's must be converted to strings before recording
3574	>	their values }
3575	>	SQL_VARYING, SQL_TEXT:
3576	>	begin
3577	>	CharSetSize := FBase.GetCharSetSize(sqlsubtype and $FF);
3578	>	CharSetName := FBase.GetCharSetName(sqlsubtype and $FF);
3579	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3580	>	FieldCodePage := FBase.GetCodePage(sqlsubtype and $FF);
3581	>	{$ENDIF}
3582	>	{FieldSize is encoded for strings - see TIBStringField.SetSize for decode}
3583	>	FieldSize := sqllen;
3584	>	if CharSetSize = 2 then
3585	>	FieldType := ftWideString
3586	>	else
3587	>	FieldType := ftString;
3588	>	end;
3589	>	{ All Doubles/Floats should be cast to doubles }
3590	>	SQL_DOUBLE, SQL_FLOAT:
3591	>	FieldType := ftFloat;
3592	>	SQL_SHORT:
3593	>	begin
3594	>	if (sqlscale = 0) then
3595	>	FieldType := ftSmallInt
3596	>	else begin
3597	>	FieldType := ftBCD;
3598	>	FieldPrecision := 4;
3599	>	FieldSize := -sqlscale;
3600	>	end;
3601	>	end;
3602	>	SQL_LONG:
3603	>	begin
3604	>	if (sqlscale = 0) then
3605	>	FieldType := ftInteger
3606	>	else if (sqlscale >= (-4)) then
3607	>	begin
3608	>	FieldType := ftBCD;
3609	>	FieldPrecision := 9;
3610	>	FieldSize := -sqlscale;
3611	>	end
3612	>	else
3613	>	if Database.SQLDialect = 1 then
3614	>	FieldType := ftFloat
3615	>	else
3616	>	if (FieldCount > i) and (Fields[i] is TFloatField) then
3617	>	FieldType := ftFloat
3618	>	else
3619	>	begin
3620	>	FieldType := ftFMTBCD;
3621	>	FieldPrecision := 9;
3622	>	FieldSize := -sqlscale;
3623	>	end;
3624	>	end;
3625	>
3626	>	SQL_INT64:
3627	>	begin
3628	>	if (sqlscale = 0) then
3629	>	FieldType := ftLargeInt
3630	>	else if (sqlscale >= (-4)) then
3631	>	begin
3632	>	FieldType := ftBCD;
3633	>	FieldPrecision := 18;
3634	>	FieldSize := -sqlscale;
3635	>	end
3636	>	else
3637	>	FieldType := ftFloat
3638	>	end;
3639	>	SQL_TIMESTAMP: FieldType := ftDateTime;
3640	>	SQL_TYPE_TIME: FieldType := ftTime;
3641	>	SQL_TYPE_DATE: FieldType := ftDate;
3642	>	SQL_BLOB:
3643	>	begin
3644	>	FieldSize := sizeof (TISC_QUAD);
3645	>	if (sqlsubtype = 1) then
3646	>	begin
3647	>	if FBase.GetDefaultCharSetName <> '' then
3648	>	begin
3649	>	CharSetSize := FBase.GetDefaultCharSetSize;
3650	>	CharSetName := FBase.GetDefaultCharSetName;
3651	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3652	>	FieldCodePage := FBase.GetDefaultCodePage;
3653	>	{$ENDIF}
3654	>	end
3655	>	else
3656	>	if strpas(sqlname) <> '' then
3657	>	begin
3658	>	charSetID := GetBlobCharSetID(Database.Handle,Database.InternalTransaction.Handle,
3659	>	@relname,@sqlname);
3660	>	CharSetSize := FBase.GetCharSetSize(charSetID);
3661	>	CharSetName := FBase.GetCharSetName(charSetID);
3662	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3663	>	FieldCodePage := FBase.GetCodePage(charSetID);
3664	>	{$ENDIF}
3665	>	end
3666	>	else  {Complex SQL with no identifiable column and no connection default}
3667	>	begin
3668	>	CharSetName := '';
3669	>	CharSetSize := 1;
3670	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3671	>	FieldCodePage := CP_NONE;
3672	>	{$ENDIF}
3673	>	end;
3674	>	if CharSetSize = 2 then
3675	>	FieldType := ftWideMemo
3676	>	else
3677	>	FieldType := ftMemo;
3678	>	end
3679	>	else
3680	>	FieldType := ftBlob;
3681	>	end;
3682	>	SQL_ARRAY:
3683	>	begin
3684	>	FieldSize := sizeof (TISC_QUAD);
3685	>	FieldType := ftUnknown;
3686	>	end;
3687	>	SQL_BOOLEAN:
3688	>	FieldType:= ftBoolean;
3689	>	else
3690	>	FieldType := ftUnknown;
3691	>	end;
3692	>	FieldPosition := i + 1;
3693	>	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
3694	>	begin
3695	>	FMappedFieldPosition[FieldIndex] := FieldPosition;
3696	>	Inc(FieldIndex);
3697	>	with TIBFieldDef.Create(FieldDefs,'',FieldType,0,False,FieldDefs.Count+1) do
3698	>	begin
3699	>	Name := FieldAliasName;
3700	>	FAliasNameMap[FieldNo-1] := DBAliasName;
3701	>	Size := FieldSize;
3702	>	Precision := FieldPrecision;
3703	>	Required := not FieldNullable;
3704	>	InternalCalcField := False;
3705	>	CharacterSetSize := CharSetSize;
3706	>	CharacterSetName := CharSetName;
3707	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3708	>	CodePage := FieldCodePage;
3709	>	{$ENDIF}
3710	>	if (FieldName <> '') and (RelationName <> '') then
3711	>	begin
3712	>	if Has_COMPUTED_BLR(RelationName, FieldName) then
3713	>	begin
3714	>	Attributes := [faReadOnly];
3715	>	InternalCalcField := True;
3716	>	FNeedsRefresh := True;
3717	>	end
3718	>	else
3719	>	begin
3720	>	if Has_DEFAULT_VALUE(RelationName, FieldName) then
3721	>	begin
3722	>	if not FieldNullable then
3723	>	Attributes := [faRequired];
3724	>	end
3725	>	else
3726	>	FNeedsRefresh := True;
3727	>	end;
3728	>	end;
3729	>	end;
3730	>	end;
3731	>	end;
3732	>	finally
3733	>	Query.free;
3734	>	FreeNodes;
3735	>	Database.InternalTransaction.Commit;
3736	>	FieldDefs.EndUpdate;
3737	>	end;
3738	>	end;
3739	>
3740	>	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
3741	>	begin
3742	>	CopyRecordBuffer(FModelBuffer, Buffer);
3743	>	end;
3744	>
3745	>	procedure TIBCustomDataSet.InternalLast;
3746	>	var
3747	>	Buffer: PChar;
3748	>	begin
3749	>	if (FQSelect.EOF) then
3750	>	FCurrentRecord := FRecordCount
3751	>	else begin
3752	>	Buffer := AllocRecordBuffer;
3753	>	try
3754	>	while FQSelect.Next <> nil do
3755	>	begin
3756	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3757	>	Inc(FRecordCount);
3758	>	end;
3759	>	FCurrentRecord := FRecordCount;
3760	>	finally
3761	>	FreeRecordBuffer(Buffer);
3762	>	end;
3763	>	end;
3764	>	end;
3765	>
3766	>	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
3767	>	var
3768	>	i: Integer;
3769	>	cur_param: TIBXSQLVAR;
3770	>	cur_field: TField;
3771	>	s: TStream;
3772	>	begin
3773	>	if FQSelect.SQL.Text = '' then
3774	>	IBError(ibxeEmptyQuery, [nil]);
3775	>	if not FInternalPrepared then
3776	>	InternalPrepare;
3777	>	if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
3778	>	begin
3779	>	for i := 0 to SQLParams.Count - 1 do
3780	>	begin
3781	>	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
3782	>	cur_param := SQLParams[i];
3783	>	if (cur_field <> nil) then begin
3784	>	if (cur_field.IsNull) then
3785	>	cur_param.IsNull := True
3786	>	else case cur_field.DataType of
3787	>	ftString:
3788	>	cur_param.AsString := cur_field.AsString;
3789	>	ftBoolean:
3790	>	cur_param.AsBoolean := cur_field.AsBoolean;
3791	>	ftSmallint, ftWord:
3792	>	cur_param.AsShort := cur_field.AsInteger;
3793	>	ftInteger:
3794	>	cur_param.AsLong := cur_field.AsInteger;
3795	>	ftLargeInt:
3796	>	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
3797	>	ftFloat, ftCurrency:
3798	>	cur_param.AsDouble := cur_field.AsFloat;
3799	>	ftBCD:
3800	>	cur_param.AsCurrency := cur_field.AsCurrency;
3801	>	ftDate:
3802	>	cur_param.AsDate := cur_field.AsDateTime;
3803	>	ftTime:
3804	>	cur_param.AsTime := cur_field.AsDateTime;
3805	>	ftDateTime:
3806	>	cur_param.AsDateTime := cur_field.AsDateTime;
3807	>	ftBlob, ftMemo:
3808	>	begin
3809	>	s := nil;
3810	>	try
3811	>	s := DataSource.DataSet.
3812	>	CreateBlobStream(cur_field, bmRead);
3813	>	cur_param.LoadFromStream(s);
3814	>	finally
3815	>	s.free;
3816	>	end;
3817	>	end;
3818	>	else
3819	>	IBError(ibxeNotSupported, [nil]);
3820	>	end;
3821	>	end;
3822	>	end;
3823	>	end;
3824	>	end;
3825	>
3826	>	procedure TIBCustomDataSet.ReQuery;
3827	>	begin
3828	>	FQSelect.Close;
3829	>	ClearBlobCache;
3830	>	FCurrentRecord := -1;
3831	>	FRecordCount := 0;
3832	>	FDeletedRecords := 0;
3833	>	FBPos := 0;
3834	>	FOBPos := 0;
3835	>	FBEnd := 0;
3836	>	FOBEnd := 0;
3837	>	FQSelect.Close;
3838	>	FQSelect.ExecQuery;
3839	>	FOpen := FQSelect.Open;
3840	>	First;
3841	>	end;
3842	>
3843	>	procedure TIBCustomDataSet.InternalOpen;
3844	>
3845	>	function RecordDataLength(n: Integer): Long;
3846	>	begin
3847	>	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
3848	>	end;
3849	>
3850	>	function GetFieldDef(aFieldNo: integer): TIBFieldDef;
3851	>	var i: integer;
3852	>	begin
3853	>	Result := nil;
3854	>	for i := 0 to FieldDefs.Count - 1 do
3855	>	if FieldDefs[i].FieldNo = aFieldNo then
3856	>	begin
3857	>	Result := TIBFieldDef(FieldDefs[i]);
3858	>	break;
3859	>	end;
3860	>	end;
3861	>
3862	>	procedure SetExtendedProperties;
3863	>	var i: integer;
3864	>	IBFieldDef: TIBFieldDef;
3865	>	begin
3866	>	for i := 0 to Fields.Count - 1 do
3867	>	if Fields[i].FieldNo > 0 then
3868	>	begin
3869	>	if(Fields[i] is TIBStringField) then
3870	>	with TIBStringField(Fields[i]) do
3871	>	begin
3872	>	IBFieldDef := GetFieldDef(FieldNo);
3873	>	if IBFieldDef <> nil then
3874	>	begin
3875	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
3876	>	CharacterSetName := IBFieldDef.CharacterSetName;
3877	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3878	>	CodePage := IBFieldDef.CodePage;
3879	>	{$ENDIF}
3880	>	end;
3881	>	end
3882	>	else
3883	>	if(Fields[i] is TIBWideStringField) then
3884	>	with TIBWideStringField(Fields[i]) do
3885	>	begin
3886	>	IBFieldDef := GetFieldDef(FieldNo);
3887	>	if IBFieldDef <> nil then
3888	>	begin
3889	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
3890	>	CharacterSetName := IBFieldDef.CharacterSetName;
3891	>	end;
3892	>	end
3893	>	else
3894	>	if(Fields[i] is TIBMemoField) then
3895	>	with TIBMemoField(Fields[i]) do
3896	>	begin
3897	>	IBFieldDef := GetFieldDef(FieldNo);
3898	>	if IBFieldDef <> nil then
3899	>	begin
3900	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
3901	>	CharacterSetName := IBFieldDef.CharacterSetName;
3902	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3903	>	CodePage := IBFieldDef.CodePage;
3904	>	{$ENDIF}
3905	>	end;
3906	>	end
3907	>	else
3908	>	if(Fields[i] is TIBWideMemoField) then
3909	>	with TIBWideMemoField(Fields[i]) do
3910	>	begin
3911	>	IBFieldDef := GetFieldDef(FieldNo);
3912	>	if IBFieldDef <> nil then
3913	>	begin
3914	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
3915	>	CharacterSetName := IBFieldDef.CharacterSetName;
3916	>	end;
3917	>	end
3918	>	end
3919	>	end;
3920	>
3921	>	begin
3922	>	FBase.SetCursor;
3923	>	try
3924	>	ActivateConnection;
3925	>	ActivateTransaction;
3926	>	if FQSelect.SQL.Text = '' then
3927	>	IBError(ibxeEmptyQuery, [nil]);
3928	>	if not FInternalPrepared then
3929	>	InternalPrepare;
3930	>	if FQSelect.SQLType = SQLSelect then
3931	>	begin
3932	>	if DefaultFields then
3933	>	CreateFields;
3934	>	BindFields(True);
3935	>	SetExtendedProperties;
3936	>	FCurrentRecord := -1;
3937	>	FQSelect.ExecQuery;
3938	>	FOpen := FQSelect.Open;
3939	>
3940	>	{ Initialize offsets, buffer sizes, etc...
3941	>	1. Initially FRecordSize is just the "RecordDataLength".
3942	>	2. Allocate a "model" buffer and do a dummy fetch
3943	>	3. After the dummy fetch, FRecordSize will be appropriately
3944	>	adjusted to reflect the additional "weight" of the field
3945	>	data.
3946	>	4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize.
3947	>	5. Now, with the BufferSize available, allocate memory for chunks of records
3948	>	6. Re-allocate the model buffer, accounting for the new
3949	>	FRecordBufferSize.
3950	>	7. Finally, calls to AllocRecordBuffer will work!.
3951	>	}
3952	>	{Step 1}
3953	>	FRecordSize := RecordDataLength(FQSelect.Current.Count);
3954	>	{Step 2, 3}
3955	>	IBAlloc(FModelBuffer, 0, FRecordSize);
3956	>	FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer);
3957	>	{Step 4}
3958	>	FCalcFieldsOffset := FRecordSize;
3959	>	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
3960	>	FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
3961	>	{Step 5}
3962	>	if UniDirectional then
3963	>	FBufferChunkSize := FRecordBufferSize * UniCache
3964	>	else
3965	>	FBufferChunkSize := FRecordBufferSize * BufferChunks;
3966	>	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
3967	>	if FCachedUpdates or (csReading in ComponentState) then
3968	>	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
3969	>	FBPos := 0;
3970	>	FOBPos := 0;
3971	>	FBEnd := 0;
3972	>	FOBEnd := 0;
3973	>	FCacheSize := FBufferChunkSize;
3974	>	FOldCacheSize := FBufferChunkSize;
3975	>	{Step 6}
3976	>	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count),
3977	>	FRecordBufferSize);
3978	>	{Step 7}
3979	>	FOldBuffer := AllocRecordBuffer;
3980	>	end
3981	>	else
3982	>	FQSelect.ExecQuery;
3983	>	finally
3984	>	FBase.RestoreCursor;
3985	>	end;
3986	>	end;
3987	>
3988	>	procedure TIBCustomDataSet.InternalPost;
3989	>	var
3990	>	Qry: TIBSQL;
3991	>	Buff: PChar;
3992	>	bInserting: Boolean;
3993	>	begin
3994	>	FBase.SetCursor;
3995	>	try
3996	>	Buff := GetActiveBuf;
3997	>	CheckEditState;
3998	>	AdjustRecordOnInsert(Buff);
3999	>	if (State = dsInsert) then
4000	>	begin
4001	>	bInserting := True;
4002	>	Qry := FQInsert;
4003	>	PRecordData(Buff)^.rdUpdateStatus := usInserted;
4004	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
4005	>	WriteRecordCache(FRecordCount, Buff);
4006	>	FCurrentRecord := FRecordCount;
4007	>	end
4008	>	else begin
4009	>	bInserting := False;
4010	>	Qry := FQModify;
4011	>	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
4012	>	begin
4013	>	PRecordData(Buff)^.rdUpdateStatus := usModified;
4014	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
4015	>	end
4016	>	else if PRecordData(Buff)^.
4017	>	rdCachedUpdateStatus = cusUninserted then
4018	>	begin
4019	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
4020	>	Dec(FDeletedRecords);
4021	>	end;
4022	>	end;
4023	>	if (not CachedUpdates) then
4024	>	InternalPostRecord(Qry, Buff)
4025	>	else begin
4026	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
4027	>	FUpdatesPending := True;
4028	>	end;
4029	>	if bInserting then
4030	>	Inc(FRecordCount);
4031	>	finally
4032	>	FBase.RestoreCursor;
4033	>	end;
4034	>	end;
4035	>
4036	>	procedure TIBCustomDataSet.InternalRefresh;
4037	>	begin
4038	>	inherited InternalRefresh;
4039	>	InternalRefreshRow;
4040	>	end;
4041	>
4042	>	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
4043	>	begin
4044	>	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
4045	>	end;
4046	>
4047	>	function TIBCustomDataSet.IsCursorOpen: Boolean;
4048	>	begin
4049	>	result := FOpen;
4050	>	end;
4051	>
4052	>	procedure TIBCustomDataSet.Loaded;
4053	>	begin
4054	>	if assigned(FQSelect) then
4055	>	FBaseSQLSelect.assign(FQSelect.SQL);
4056	>	inherited Loaded;
4057	>	end;
4058	>
4059	>	procedure TIBCustomDataSet.Post;
4060	>	var CancelPost: boolean;
4061	>	begin
4062	>	CancelPost := false;
4063	>	if assigned(FOnValidatePost) then
4064	>	OnValidatePost(self,CancelPost);
4065	>	if CancelPost then
4066	>	Cancel
4067	>	else
4068	>	inherited Post;
4069	>	end;
4070	>
4071	>	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
4072	>	Options: TLocateOptions): Boolean;
4073	>	var
4074	>	{$IFDEF NEW_TBOOKMARK }
4075	>	CurBookmark: TBookmark;
4076	>	{$ELSE}
4077	>	CurBookmark: string;
4078	>	{$ENDIF}
4079	>	begin
4080	>	DisableControls;
4081	>	try
4082	>	CurBookmark := Bookmark;
4083	>	First;
4084	>	result := InternalLocate(KeyFields, KeyValues, Options);
4085	>	if not result then
4086	>	Bookmark := CurBookmark;
4087	>	finally
4088	>	EnableControls;
4089	>	end;
4090	>	end;
4091	>
4092	>	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
4093	>	const ResultFields: string): Variant;
4094	>	var
4095	>	fl: TList;
4096	>	{$IFDEF NEW_TBOOKMARK }
4097	>	CurBookmark: TBookmark;
4098	>	{$ELSE}
4099	>	CurBookmark: string;
4100	>	{$ENDIF}
4101	>	begin
4102	>	DisableControls;
4103	>	fl := TList.Create;
4104	>	CurBookmark := Bookmark;
4105	>	try
4106	>	First;
4107	>	if InternalLocate(KeyFields, KeyValues, []) then
4108	>	begin
4109	>	if (ResultFields <> '') then
4110	>	result := FieldValues[ResultFields]
4111	>	else
4112	>	result := NULL;
4113	>	end
4114	>	else
4115	>	result := Null;
4116	>	finally
4117	>	Bookmark := CurBookmark;
4118	>	fl.Free;
4119	>	EnableControls;
4120	>	end;
4121	>	end;
4122	>
4123	>	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
4124	>	begin
4125	>	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
4126	>	end;
4127	>
4128	>	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
4129	>	begin
4130	>	PRecordData(Buffer)^.rdBookmarkFlag := Value;
4131	>	end;
4132	>
4133	>	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
4134	>	begin
4135	>	if not Value and FCachedUpdates then
4136	>	CancelUpdates;
4137	>	if (not (csReading in ComponentState)) and Value then
4138	>	CheckDatasetClosed;
4139	>	FCachedUpdates := Value;
4140	>	end;
4141	>
4142	>	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
4143	>	begin
4144	>	if IsLinkedTo(Value) then
4145	>	IBError(ibxeCircularReference, [nil]);
4146	>	if FDataLink <> nil then
4147	>	FDataLink.DataSource := Value;
4148	>	end;
4149	>
4150	>	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
4151	>	var
4152	>	Buff, TmpBuff: PChar;
4153	>	MappedFieldPos: integer;
4154	>	begin
4155	>	Buff := GetActiveBuf;
4156	>	if Field.FieldNo < 0 then
4157	>	begin
4158	>	TmpBuff := Buff + FRecordSize + Field.Offset;
4159	>	Boolean(TmpBuff[0]) := LongBool(Buffer);
4160	>	if Boolean(TmpBuff[0]) then
4161	>	Move(Buffer^, TmpBuff[1], Field.DataSize);
4162	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
4163	>	end
4164	>	else begin
4165	>	CheckEditState;
4166	>	with PRecordData(Buff)^ do
4167	>	begin
4168	>	{ If inserting, Adjust record position }
4169	>	AdjustRecordOnInsert(Buff);
4170	>	MappedFieldPos := FMappedFieldPosition[Field.FieldNo - 1];
4171	>	if (MappedFieldPos > 0) and
4172	>	(MappedFieldPos <= rdFieldCount) then
4173	>	begin
4174	>	Field.Validate(Buffer);
4175	>	if (Buffer = nil) or
4176	>	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
4177	>	rdFields[MappedFieldPos].fdIsNull := True
4178	>	else begin
4179	>	Move(Buffer^, Buff[rdFields[MappedFieldPos].fdDataOfs],
4180	>	rdFields[MappedFieldPos].fdDataSize);
4181	>	if (rdFields[MappedFieldPos].fdDataType = SQL_TEXT) or
4182	>	(rdFields[MappedFieldPos].fdDataType = SQL_VARYING) then
4183	>	rdFields[MappedFieldPos].fdDataLength := StrLen(PChar(Buffer));
4184	>	rdFields[MappedFieldPos].fdIsNull := False;
4185	>	if rdUpdateStatus = usUnmodified then
4186	>	begin
4187	>	if CachedUpdates then
4188	>	begin
4189	>	FUpdatesPending := True;
4190	>	if State = dsInsert then
4191	>	rdCachedUpdateStatus := cusInserted
4192	>	else if State = dsEdit then
4193	>	rdCachedUpdateStatus := cusModified;
4194	>	end;
4195	>
4196	>	if State = dsInsert then
4197	>	rdUpdateStatus := usInserted
4198	>	else
4199	>	rdUpdateStatus := usModified;
4200	>	end;
4201	>	WriteRecordCache(rdRecordNumber, Buff);
4202	>	SetModified(True);
4203	>	end;
4204	>	end;
4205	>	end;
4206	>	end;
4207	>	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
4208	>	DataEvent(deFieldChange, PtrInt(Field));
4209	>	end;
4210	>
4211	>	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
4212	>	begin
4213	>	CheckBrowseMode;
4214	>	if (Value < 1) then
4215	>	Value := 1
4216	>	else if Value > FRecordCount then
4217	>	begin
4218	>	InternalLast;
4219	>	Value := Min(FRecordCount, Value);
4220	>	end;
4221	>	if (Value <> RecNo) then
4222	>	begin
4223	>	DoBeforeScroll;
4224	>	FCurrentRecord := Value - 1;
4225	>	Resync([]);
4226	>	DoAfterScroll;
4227	>	end;
4228	>	end;
4229	>
4230	>	procedure TIBCustomDataSet.Disconnect;
4231	>	begin
4232	>	Close;
4233	>	InternalUnPrepare;
4234	>	end;
4235	>
4236	>	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
4237	>	begin
4238	>	if not CanModify then
4239	>	IBError(ibxeCannotUpdate, [nil])
4240	>	else
4241	>	FUpdateMode := Value;
4242	>	end;
4243	>
4244	>
4245	>	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
4246	>	begin
4247	>	if Value <> FUpdateObject then
4248	>	begin
4249	>	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
4250	>	FUpdateObject.DataSet := nil;
4251	>	FUpdateObject := Value;
4252	>	if Assigned(FUpdateObject) then
4253	>	begin
4254	>	if Assigned(FUpdateObject.DataSet) and
4255	>	(FUpdateObject.DataSet <> Self) then
4256	>	FUpdateObject.DataSet.UpdateObject := nil;
4257	>	FUpdateObject.DataSet := Self;
4258	>	end;
4259	>	end;
4260	>	end;
4261	>
4262	>	function TIBCustomDataSet.ConstraintsStored: Boolean;
4263	>	begin
4264	>	Result := Constraints.Count > 0;
4265	>	end;
4266	>
4267	>	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
4268	>	begin
4269	>	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
4270	>	end;
4271	>
4272	>	procedure TIBCustomDataSet.ClearIBLinks;
4273	>	var i: integer;
4274	>	begin
4275	>	for i := FIBLinks.Count - 1 downto 0 do
4276	>	TIBControlLink(FIBLinks[i]).IBDataSet := nil;
4277	>	end;
4278	>
4279	>
4280	>	procedure TIBCustomDataSet.InternalUnPrepare;
4281	>	begin
4282	>	if FInternalPrepared then
4283	>	begin
4284	>	CheckDatasetClosed;
4285	>	FieldDefs.Clear;
4286	>	FieldDefs.Updated := false;
4287	>	FInternalPrepared := False;
4288	>	Setlength(FAliasNameList,0);
4289	>	end;
4290	>	end;
4291	>
4292	>	procedure TIBCustomDataSet.InternalExecQuery;
4293	>	var
4294	>	DidActivate: Boolean;
4295	>	begin
4296	>	DidActivate := False;
4297	>	FBase.SetCursor;
4298	>	try
4299	>	ActivateConnection;
4300	>	DidActivate := ActivateTransaction;
4301	>	if FQSelect.SQL.Text = '' then
4302	>	IBError(ibxeEmptyQuery, [nil]);
4303	>	if not FInternalPrepared then
4304	>	InternalPrepare;
4305	>	if FQSelect.SQLType = SQLSelect then
4306	>	begin
4307	>	IBError(ibxeIsASelectStatement, [nil]);
4308	>	end
4309	>	else
4310	>	FQSelect.ExecQuery;
4311	>	finally
4312	>	if DidActivate then
4313	>	DeactivateTransaction;
4314	>	FBase.RestoreCursor;
4315	>	end;
4316	>	end;
4317	>
4318	>	function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE;
4319	>	begin
4320	>	Result := FQSelect.Handle;
4321	>	end;
4322	>
4323	>	function TIBCustomDataSet.GetParser: TSelectSQLParser;
4324	>	begin
4325	>	if not assigned(FParser) then
4326	>	FParser := CreateParser;
4327	>	Result := FParser
4328	>	end;
4329	>
4330	>	procedure TIBCustomDataSet.ResetParser;
4331	>	begin
4332	>	if assigned(FParser) then
4333	>	begin
4334	>	FParser.Free;
4335	>	FParser := nil;
4336	>	FQSelect.OnSQLChanged := nil; {Do not react to change}
4337	>	try
4338	>	FQSelect.SQL.Assign(FBaseSQLSelect);
4339	>	finally
4340	>	FQSelect.OnSQLChanged := SQLChanged;
4341	>	end;
4342	>	end;
4343	>	end;
4344	>
4345	>	function TIBCustomDataSet.HasParser: boolean;
4346	>	begin
4347	>	Result := not (csDesigning in ComponentState) and (FParser <> nil)
4348	>	end;
4349	>
4350	>	procedure TIBCustomDataSet.SetGenerateParamNames(AValue: Boolean);
4351	>	begin
4352	>	if FGenerateParamNames = AValue then Exit;
4353	>	FGenerateParamNames := AValue;
4354	>	Disconnect
4355	>	end;
4356	>
4357	>	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
4358	>	begin
4359	>	inherited InitRecord(Buffer);
4360	>	with PRecordData(Buffer)^ do
4361	>	begin
4362	>	rdUpdateStatus := TUpdateStatus(usInserted);
4363	>	rdBookMarkFlag := bfInserted;
4364	>	rdRecordNumber := -1;
4365	>	end;
4366	>	end;
4367	>
4368	>	procedure TIBCustomDataSet.InternalInsert;
4369	>	begin
4370	>	CursorPosChanged;
4371	>	end;
4372	>
4373	>	{ TIBDataSet IProviderSupport }
4374	>
4375	>	(*procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
4376	>	begin
4377	>	if Commit then
4378	>	Transaction.Commit else
4379	>	Transaction.Rollback;
4380	>	end;
4381	>
4382	>	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
4383	>	ResultSet: Pointer = nil): Integer;
4384	>	var
4385	>	FQuery: TIBQuery;
4386	>	begin
4387	>	if Assigned(ResultSet) then
4388	>	begin
4389	>	TDataSet(ResultSet^) := TIBQuery.Create(nil);
4390	>	with TIBQuery(ResultSet^) do
4391	>	begin
4392	>	SQL.Text := ASQL;
4393	>	Params.Assign(AParams);
4394	>	Open;
4395	>	Result := RowsAffected;
4396	>	end;
4397	>	end
4398	>	else
4399	>	begin
4400	>	FQuery := TIBQuery.Create(nil);
4401	>	try
4402	>	FQuery.Database := Database;
4403	>	FQuery.Transaction := Transaction;
4404	>	FQuery.GenerateParamNames := True;
4405	>	FQuery.SQL.Text := ASQL;
4406	>	FQuery.Params.Assign(AParams);
4407	>	FQuery.ExecSQL;
4408	>	Result := FQuery.RowsAffected;
4409	>	finally
4410	>	FQuery.Free;
4411	>	end;
4412	>	end;
4413	>	end;
4414	>
4415	>	function TIBCustomDataSet.PSGetQuoteChar: string;
4416	>	begin
4417	>	if Database.SQLDialect = 3 then
4418	>	Result := '"' else
4419	>	Result := '';
4420	>	end;
4421	>
4422	>	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
4423	>	var
4424	>	PrevErr: Integer;
4425	>	begin
4426	>	if Prev <> nil then
4427	>	PrevErr := Prev.ErrorCode else
4428	>	PrevErr := 0;
4429	>	if E is EIBError then
4430	>	with EIBError(E) do
4431	>	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
4432	>	Result := inherited PSGetUpdateException(E, Prev);
4433	>	end;
4434	>
4435	>	function TIBCustomDataSet.PSInTransaction: Boolean;
4436	>	begin
4437	>	Result := Transaction.InTransaction;
4438	>	end;
4439	>
4440	>	function TIBCustomDataSet.PSIsSQLBased: Boolean;
4441	>	begin
4442	>	Result := True;
4443	>	end;
4444	>
4445	>	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
4446	>	begin
4447	>	Result := True;
4448	>	end;
4449	>
4450	>	procedure TIBCustomDataSet.PSReset;
4451	>	begin
4452	>	inherited PSReset;
4453	>	if Active then
4454	>	begin
4455	>	Close;
4456	>	Open;
4457	>	end;
4458	>	end;
4459	>
4460	>	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
4461	>	var
4462	>	UpdateAction: TIBUpdateAction;
4463	>	SQL: string;
4464	>	Params: TParams;
4465	>
4466	>	procedure AssignParams(DataSet: TDataSet; Params: TParams);
4467	>	var
4468	>	I: Integer;
4469	>	Old: Boolean;
4470	>	Param: TParam;
4471	>	PName: string;
4472	>	Field: TField;
4473	>	Value: Variant;
4474	>	begin
4475	>	for I := 0 to Params.Count - 1 do
4476	>	begin
4477	>	Param := Params[I];
4478	>	PName := Param.Name;
4479	>	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
4480	>	if Old then System.Delete(PName, 1, 4);
4481	>	Field := DataSet.FindField(PName);
4482	>	if not Assigned(Field) then Continue;
4483	>	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
4484	>	begin
4485	>	Value := Field.NewValue;
4486	>	if VarIsEmpty(Value) then Value := Field.OldValue;
4487	>	Param.AssignFieldValue(Field, Value);
4488	>	end;
4489	>	end;
4490	>	end;
4491	>
4492	>	begin
4493	>	Result := False;
4494	>	if Assigned(OnUpdateRecord) then
4495	>	begin
4496	>	UpdateAction := uaFail;
4497	>	if Assigned(FOnUpdateRecord) then
4498	>	begin
4499	>	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
4500	>	Result := UpdateAction = uaApplied;
4501	>	end;
4502	>	end
4503	>	else if Assigned(FUpdateObject) then
4504	>	begin
4505	>	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
4506	>	if SQL <> '' then
4507	>	begin
4508	>	Params := TParams.Create;
4509	>	try
4510	>	Params.ParseSQL(SQL, True);
4511	>	AssignParams(Delta, Params);
4512	>	if PSExecuteStatement(SQL, Params) = 0 then
4513	>	IBError(ibxeNoRecordsAffected, [nil]);
4514	>	Result := True;
4515	>	finally
4516	>	Params.Free;
4517	>	end;
4518	>	end;
4519	>	end;
4520	>	end;
4521	>
4522	>	procedure TIBCustomDataSet.PSStartTransaction;
4523	>	begin
4524	>	ActivateConnection;
4525	>	Transaction.StartTransaction;
4526	>	end;
4527	>
4528	>	function TIBCustomDataSet.PSGetTableName: string;
4529	>	begin
4530	>	//  if not FInternalPrepared then
4531	>	//    InternalPrepare;
4532	>	{ It is possible for the FQSelectSQL to be unprepared
4533	>	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
4534	>	So check the Prepared of the SelectSQL instead }
4535	>	if not FQSelect.Prepared then
4536	>	FQSelect.Prepare;
4537	>	Result := FQSelect.UniqueRelationName;
4538	>	end;*)
4539	>
4540	>	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
4541	>	begin
4542	>	InternalBatchInput(InputObject);
4543	>	end;
4544	>
4545	>	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
4546	>	begin
4547	>	InternalBatchOutput(OutputObject);
4548	>	end;
4549	>
4550	>	procedure TIBDataSet.ExecSQL;
4551	>	begin
4552	>	InternalExecQuery;
4553	>	end;
4554	>
4555	>	procedure TIBDataSet.Prepare;
4556	>	begin
4557	>	InternalPrepare;
4558	>	end;
4559	>
4560	>	procedure TIBDataSet.UnPrepare;
4561	>	begin
4562	>	InternalUnPrepare;
4563	>	end;
4564	>
4565	>	function TIBDataSet.GetPrepared: Boolean;
4566	>	begin
4567	>	Result := InternalPrepared;
4568	>	end;
4569	>
4570	>	procedure TIBDataSet.InternalOpen;
4571	>	begin
4572	>	ActivateConnection;
4573	>	ActivateTransaction;
4574	>	InternalSetParamsFromCursor;
4575	>	Inherited InternalOpen;
4576	>	end;
4577	>
4578	>	procedure TIBDataSet.SetFiltered(Value: Boolean);
4579	>	begin
4580	>	if(Filtered <> Value) then
4581	>	begin
4582	>	inherited SetFiltered(value);
4583	>	if Active then
4584	>	begin
4585	>	Close;
4586	>	Open;
4587	>	end;
4588	>	end
4589	>	else
4590	>	inherited SetFiltered(value);
4591	>	end;
4592	>
4593	>	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
4594	>	begin
4595	>	Result := false;
4596	>	if not Assigned(Bookmark) then
4597	>	exit;
4598	>	Result := PInteger(Bookmark)^ < FRecordCount;
4599	>	end;
4600	>
4601	>	function TIBCustomDataSet.GetFieldData(Field: TField;
4602	>	Buffer: Pointer): Boolean;
4603	>	{$IFDEF TBCDFIELD_IS_BCD}
4604	>	var
4605	>	lTempCurr : System.Currency;
4606	>	begin
4607	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4608	>	begin
4609	>	Result := InternalGetFieldData(Field, @lTempCurr);
4610	>	if Result then
4611	>	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
4612	>	end
4613	>	else
4614	>	{$ELSE}
4615	>	begin
4616	>	{$ENDIF}
4617	>	Result := InternalGetFieldData(Field, Buffer);
4618	>	end;
4619	>
4620	>	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
4621	>	NativeFormat: Boolean): Boolean;
4622	>	begin
4623	>	if (Field.DataType = ftBCD) and not NativeFormat then
4624	>	Result := InternalGetFieldData(Field, Buffer)
4625	>	else
4626	>	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
4627	>	end;
4628	>
4629	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
4630	>	{$IFDEF TDBDFIELD_IS_BCD}
4631	>	var
4632	>	lTempCurr : System.Currency;
4633	>	begin
4634	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4635	>	begin
4636	>	BCDToCurr(TBCD(Buffer^), lTempCurr);
4637	>	InternalSetFieldData(Field, @lTempCurr);
4638	>	end
4639	>	else
4640	>	{$ELSE}
4641	>	begin
4642	>	{$ENDIF}
4643	>	InternalSetFieldData(Field, Buffer);
4644	>	end;
4645	>
4646	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
4647	>	NativeFormat: Boolean);
4648	>	begin
4649	>	if (not NativeFormat) and (Field.DataType = ftBCD) then
4650	>	InternalSetfieldData(Field, Buffer)
4651	>	else
4652	>	inherited SetFieldData(Field, buffer, NativeFormat);
4653	>	end;
4654	>
4655	>	{ TIBDataSetUpdateObject }
4656	>
4657	>	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
4658	>	begin
4659	>	inherited Create(AOwner);
4660	>	FRefreshSQL := TStringList.Create;
4661	>	end;
4662	>
4663	>	destructor TIBDataSetUpdateObject.Destroy;
4664	>	begin
4665	>	FRefreshSQL.Free;
4666	>	inherited Destroy;
4667	>	end;
4668	>
4669	>	procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings);
4670	>	begin
4671	>	FRefreshSQL.Assign(Value);
4672	>	end;
4673	>
4674	>	procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
4675	>	begin
4676	>	if not Assigned(DataSet) then Exit;
4677	>	DataSet.SetInternalSQLParams(Query, buff);
4678	>	end;
4679	>
4680	>	{ TIBDSBlobStream }
4681	>	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
4682	>	Mode: TBlobStreamMode);
4683	>	begin
4684	>	FField := AField;
4685	>	FBlobStream := ABlobStream;
4686	>	FBlobStream.Seek(0, soFromBeginning);
4687	>	if (Mode = bmWrite) then
4688	>	FBlobStream.Truncate;
4689	>	end;
4690	>
4691	>	destructor TIBDSBlobStream.Destroy;
4692	>	begin
4693	>	if FHasWritten then
4694	>	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4695	>	inherited Destroy;
4696	>	end;
4697	>
4698	>	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
4699	>	begin
4700	>	result := FBlobStream.Read(Buffer, Count);
4701	>	end;
4702	>
4703	>	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
4704	>	begin
4705	>	result := FBlobStream.Seek(Offset, Origin);
4706	>	end;
4707	>
4708	>	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
4709	>	begin
4710	>	FBlobStream.SetSize(NewSize);
4711	>	end;
4712	>
4713	>	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
4714	>	begin
4715	>	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
4716	>	IBError(ibxeNotEditing, [nil]);
4717	>	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4718	>	TBlobField(FField).Modified := true;
4719	>	result := FBlobStream.Write(Buffer, Count);
4720	>	FHasWritten := true;
4721	>	{  TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4722	>	Removed as this caused a seek to beginning of the blob stream thus corrupting
4723	>	the blob stream. Moved to the destructor i.e. called after blob written}
4724	>	end;
4725	>
4726	>	{ TIBGenerator }
4727	>
4728	>	procedure TIBGenerator.SetIncrement(const AValue: integer);
4729	>	begin
4730	>	if AValue < 0 then
4731	>	raise Exception.Create('A Generator Increment cannot be negative');
4732	>	FIncrement := AValue
4733	>	end;
4734	>
4735	>	function TIBGenerator.GetNextValue(ADatabase: TIBDatabase;
4736	>	ATransaction: TIBTransaction): integer;
4737	>	begin
4738	>	with TIBSQL.Create(nil) do
4739	>	try
4740	>	Database := ADatabase;
4741	>	Transaction := ATransaction;
4742	>	if not assigned(Database) then
4743	>	IBError(ibxeCannotSetDatabase,[]);
4744	>	if not assigned(Transaction) then
4745	>	IBError(ibxeCannotSetTransaction,[]);
4746	>	with Transaction do
4747	>	if not InTransaction then StartTransaction;
4748	>	SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]);
4749	>	Prepare;
4750	>	ExecQuery;
4751	>	try
4752	>	Result := FieldByName('ID').AsInteger
4753	>	finally
4754	>	Close
4755	>	end;
4756	>	finally
4757	>	Free
4758	>	end;
4759	>	end;
4760	>
4761	>	constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
4762	>	begin
4763	>	FOwner := Owner;
4764	>	FIncrement := 1;
4765	>	end;
4766	>
4767	>
4768	>	procedure TIBGenerator.Apply;
4769	>	begin
4770	>	if (FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then
4771	>	Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction);
4772	>	end;
4773	>
4774	>
4775	>	end.

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