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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 66 by tony, Wed Aug 23 08:23:42 2017 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	>	{$R-}
37	>
38	>	{$IFDEF FPC}
39	>	{$Mode Delphi}
40	>	{$codepage UTF8}
41	>	{$ENDIF}
42	>
43	>	{$IFDEF DELPHI}
44	>	{$DEFINE TDBDFIELD_IS_BCD}
45	>	{$ENDIF}
46	>
47	>	interface
48	>
49	>	uses
50	>	{$IFDEF WINDOWS }
51	>	Windows,
52	>	{$ELSE}
53	>	unix,
54	>	{$ENDIF}
55	>	SysUtils, Classes, IBDatabase, IBExternals, IB,  IBSQL, Db,
56	>	IBUtils, IBBlob, IBSQLParser;
57	>
58	>	const
59	>	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
60	>	UniCache           =  2;     { Uni-directional cache is 2 records big }
61	>
62	>	type
63	>	TIBCustomDataSet = class;
64	>	TIBDataSet = class;
65	>
66	>	{ TIBDataSetUpdateObject }
67	>
68	>	TIBDataSetUpdateObject = class(TComponent)
69	>	private
70	>	FRefreshSQL: TStrings;
71	>	procedure SetRefreshSQL(value: TStrings);
72	>	protected
73	>	function GetDataSet: TIBCustomDataSet; virtual; abstract;
74	>	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
75	>	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
76	>	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
77	>	procedure InternalSetParams(Query: TIBSQL; buff: PChar);
78	>	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
79	>	public
80	>	constructor Create(AOwner: TComponent); override;
81	>	destructor Destroy; override;
82	>	published
83	>	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
84	>	end;
85	>
86	>	TBlobDataArray = array[0..0] of TIBBlobStream;
87	>	PBlobDataArray = ^TBlobDataArray;
88	>	TIBArrayField = class;
89	>
90	>	{ TIBArray }
91	>
92	>	{Wrapper class to support array cache in TIBCustomDataset and event handling}
93	>
94	>	TIBArray = class
95	>	private
96	>	FArray: IArray;
97	>	FRecNo: integer;
98	>	FField: TIBArrayField;
99	>	procedure EventHandler(Sender: IArray; Reason: TArrayEventReason);
100	>	public
101	>	constructor Create(aField: TIBArrayField; anArray: IArray);
102	>	destructor Destroy; override;
103	>	property ArrayIntf: IArray read FArray;
104	>	end;
105	>
106	>	TArrayDataArray = array [0..0] of TIBArray;
107	>	PArrayDataArray = ^TArrayDataArray;
108	>
109	>	{ TIBCustomDataSet }
110	>
111	>	TCachedUpdateStatus = (
112	>	cusUnmodified, cusModified, cusInserted,
113	>	cusDeleted, cusUninserted
114	>	);
115	>	TIBDBKey = record
116	>	DBKey: array[0..7] of Byte;
117	>	end;
118	>	PIBDBKey = ^TIBDBKey;
119	>
120	>	PFieldData = ^TFieldData;
121	>	TFieldData = record
122	>	fdIsNull: Boolean;
123	>	fdDataLength: Short;
124	>	end;
125	>
126	>	PColumnData = ^TColumnData;
127	>	TColumnData = record
128	>	fdDataType: Short;
129	>	fdDataScale: Short;
130	>	fdNullable: Boolean;
131	>	fdDataSize: Short;
132	>	fdDataOfs: Integer;
133	>	fdCodePage: TSystemCodePage;
134	>	end;
135	>
136	>	PFieldColumns = ^TFieldColumns;
137	>	TFieldColumns =  array[1..1] of TColumnData;
138	>
139	>	TRecordData = record
140	>	rdBookmarkFlag: TBookmarkFlag;
141	>	rdFieldCount: Short;
142	>	rdRecordNumber: Integer;
143	>	rdCachedUpdateStatus: TCachedUpdateStatus;
144	>	rdUpdateStatus: TUpdateStatus;
145	>	rdSavedOffset: DWORD;
146	>	rdDBKey: TIBDBKey;
147	>	rdFields: array[1..1] of TFieldData;
148	>	end;
149	>	PRecordData = ^TRecordData;
150	>
151	>	{ TIBArrayField }
152	>
153	>	TIBArrayField = class(TField)
154	>	private
155	>	FArrayBounds: TArrayBounds;
156	>	FArrayDimensions: integer;
157	>	FRelationName: string;
158	>	FCacheOffset: word;
159	>	function GetArrayID: TISC_QUAD;
160	>	function GetArrayIntf: IArray;
161	>	procedure SetArrayIntf(AValue: IArray);
162	>	protected
163	>	class procedure CheckTypeSize(AValue: Longint); override;
164	>	function GetAsString: string; override;
165	>	function GetDataSize: Integer; override;
166	>	procedure Bind(Binding: Boolean); override;
167	>	public
168	>	constructor Create(AOwner: TComponent); override;
169	>	function CreateArray: IArray;
170	>	property ArrayID: TISC_QUAD read GetArrayID;
171	>	property ArrayIntf: IArray read GetArrayIntf write SetArrayIntf;
172	>	property ArrayDimensions: integer read FArrayDimensions write FArrayDimensions;
173	>	property ArrayBounds: TArrayBounds read FArrayBounds write FArrayBounds;
174	>	end;
175	>
176	>	{ TIBStringField allows us to have strings longer than 8196 }
177	>
178	>	TIBStringField = class(TStringField)
179	>	private
180	>	FCharacterSetName: RawByteString;
181	>	FCharacterSetSize: integer;
182	>	FAutoFieldSize: boolean;
183	>	FCodePage: TSystemCodePage;
184	>	FDataSize: integer;
185	>	protected
186	>	procedure Bind(Binding: Boolean); override;
187	>	function GetDataSize: Integer; override;
188	>	public
189	>	constructor Create(aOwner: TComponent); override;
190	>	class procedure CheckTypeSize(Value: Integer); override;
191	>	function GetAsString: string; override;
192	>	function GetAsVariant: Variant; override;
193	>	function GetValue(var Value: string): Boolean;
194	>	procedure SetAsString(const Value: string); override;
195	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
196	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
197	>	property CodePage: TSystemCodePage read FCodePage write FCodePage;
198	>	published
199	>	property AutoFieldSize: boolean read FAutoFieldSize write FAutoFieldSize default true;
200	>	end;
201	>
202	>	{ TIBBCDField }
203	>	{  Actually, there is no BCD involved in this type,
204	>	instead it deals with currency types.
205	>	In IB, this is an encapsulation of Numeric (x, y)
206	>	where x < 18 and y <= 4.
207	>	Note: y > 4 will default to Floats
208	>	}
209	>	TIBBCDField = class(TBCDField)
210	>	protected
211	>	class procedure CheckTypeSize(Value: Integer); override;
212	>	function GetAsCurrency: Currency; override;
213	>	function GetAsString: string; override;
214	>	function GetAsVariant: Variant; override;
215	>	function GetDataSize: Integer; override;
216	>	public
217	>	constructor Create(AOwner: TComponent); override;
218	>	published
219	>	property Size default 8;
220	>	end;
221	>
222	>	{TIBMemoField}
223	>	{Allows us to show truncated text in DBGrids and anything else that uses
224	>	DisplayText}
225	>
226	>	TIBMemoField = class(TMemoField)
227	>	private
228	>	FCharacterSetName: RawByteString;
229	>	FCharacterSetSize: integer;
230	>	FDisplayTextAsClassName: boolean;
231	>	function GetTruncatedText: string;
232	>	protected
233	>	procedure Bind(Binding: Boolean); override;
234	>	function GetAsString: string; override;
235	>	function GetDefaultWidth: Longint; override;
236	>	procedure GetText(var AText: string; ADisplayText: Boolean); override;
237	>	procedure SetAsString(const AValue: string); override;
238	>	public
239	>	constructor Create(AOwner: TComponent); override;
240	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
241	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
242	>	published
243	>	property DisplayTextAsClassName: boolean read FDisplayTextAsClassName
244	>	write FDisplayTextAsClassName;
245	>	private
246	>	FCodePage: TSystemCodePage;
247	>	FFCodePage: TSystemCodePage;
248	>	public
249	>	property CodePage: TSystemCodePage read FFCodePage write FFCodePage;
250	>	end;
251	>
252	>	TIBDataLink = class(TDetailDataLink)
253	>	private
254	>	FDataSet: TIBCustomDataSet;
255	>	protected
256	>	procedure ActiveChanged; override;
257	>	procedure RecordChanged(Field: TField); override;
258	>	function GetDetailDataSet: TDataSet; override;
259	>	procedure CheckBrowseMode; override;
260	>	public
261	>	constructor Create(ADataSet: TIBCustomDataSet);
262	>	destructor Destroy; override;
263	>	end;
264	>
265	>	TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord);
266	>
267	>	{ TIBGenerator }
268	>
269	>	TIBGenerator = class(TPersistent)
270	>	private
271	>	FOwner: TIBCustomDataSet;
272	>	FApplyOnEvent: TIBGeneratorApplyOnEvent;
273	>	FFieldName: string;
274	>	FGeneratorName: string;
275	>	FIncrement: integer;
276	>	procedure SetIncrement(const AValue: integer);
277	>	protected
278	>	function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer;
279	>	public
280	>	constructor Create(Owner: TIBCustomDataSet);
281	>	procedure Apply;
282	>	property Owner: TIBCustomDataSet read FOwner;
283	>	published
284	>	property Generator: string read FGeneratorName write FGeneratorName;
285	>	property Field: string read FFieldName write FFieldName;
286	>	property Increment: integer read FIncrement write SetIncrement default 1;
287	>	property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
288	>	end;
289	>
290	>	{TIBControlLink - Allows IB Aware controls to react to dataset state changes}
291	>
292	>	TIBControlLink = class
293	>	private
294	>	FTIBDataSet: TIBCustomDataSet;
295	>	procedure SetIBDataSet(AValue: TIBCustomDataSet);
296	>	protected
297	>	procedure UpdateSQL(Sender: TObject); virtual;
298	>	procedure UpdateParams(Sender: TObject); virtual;
299	>	public
300	>	destructor Destroy; override;
301	>	property IBDataSet: TIBCustomDataSet read FTIBDataSet write SetIBDataSet;
302	>	end;
303	>
304	>	TIBAutoCommit = (acDisabled, acCommitRetaining);
305	>
306	>	{ TIBCustomDataSet }
307	>
308	>	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
309	>
310	>	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
311	>	UpdateKind: TUpdateKind; var TheUpdateAction: TIBUpdateAction)
312	>	of object;
313	>	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
314	>	var UpdateAction: TIBUpdateAction) of object;
315	>
316	>	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
317	>
318	>	TDataSetCloseAction = (dcDiscardChanges, dcSaveChanges);
319	>
320	>	TOnValidatePost = procedure (Sender: TObject; var CancelPost: boolean) of object;
321	>
322	>	TIBCustomDataSet = class(TDataset)
323	>	private
324	>	FAllowAutoActivateTransaction: Boolean;
325	>	FArrayFieldCount: integer;
326	>	FArrayCacheOffset: integer;
327	>	FAutoCommit: TIBAutoCommit;
328	>	FGenerateParamNames: Boolean;
329	>	FGeneratorField: TIBGenerator;
330	>	FNeedsRefresh: Boolean;
331	>	FForcedRefresh: Boolean;
332	>	FDidActivate: Boolean;
333	>	FBase: TIBBase;
334	>	FBlobCacheOffset: Integer;
335	>	FBlobStreamList: TList;
336	>	FArrayList: TList;
337	>	FBufferChunks: Integer;
338	>	FBufferCache,
339	>	FOldBufferCache: PChar;
340	>	FBufferChunkSize,
341	>	FCacheSize,
342	>	FOldCacheSize: Integer;
343	>	FFilterBuffer: PChar;
344	>	FBPos,
345	>	FOBPos,
346	>	FBEnd,
347	>	FOBEnd: DWord;
348	>	FCachedUpdates: Boolean;
349	>	FCalcFieldsOffset: Integer;
350	>	FCurrentRecord: Long;
351	>	FDeletedRecords: Long;
352	>	FModelBuffer,
353	>	FOldBuffer: PChar;
354	>	FOnValidatePost: TOnValidatePost;
355	>	FOpen: Boolean;
356	>	FInternalPrepared: Boolean;
357	>	FQDelete,
358	>	FQInsert,
359	>	FQRefresh,
360	>	FQSelect,
361	>	FQModify: TIBSQL;
362	>	FRecordBufferSize: Integer;
363	>	FRecordCount: Integer;
364	>	FRecordSize: Integer;
365	>	FDataSetCloseAction: TDataSetCloseAction;
366	>	FUniDirectional: Boolean;
367	>	FUpdateMode: TUpdateMode;
368	>	FUpdateObject: TIBDataSetUpdateObject;
369	>	FParamCheck: Boolean;
370	>	FUpdatesPending: Boolean;
371	>	FUpdateRecordTypes: TIBUpdateRecordTypes;
372	>	FMappedFieldPosition: array of Integer;
373	>	FDataLink: TIBDataLink;
374	>
375	>	FBeforeDatabaseDisconnect,
376	>	FAfterDatabaseDisconnect,
377	>	FDatabaseFree: TNotifyEvent;
378	>	FOnUpdateError: TIBUpdateErrorEvent;
379	>	FOnUpdateRecord: TIBUpdateRecordEvent;
380	>	FBeforeTransactionEnd,
381	>	FAfterTransactionEnd,
382	>	FTransactionFree: TNotifyEvent;
383	>	FAliasNameMap: array of string;
384	>	FAliasNameList: array of string;
385	>	FBaseSQLSelect: TStrings;
386	>	FParser: TSelectSQLParser;
387	>	FCloseAction: TTransactionAction;
388	>	FInTransactionEnd: boolean;
389	>	FIBLinks: TList;
390	>	FFieldColumns: PFieldColumns;
391	>	procedure InitModelBuffer(Qry: TIBSQL; Buffer: PChar);
392	>	function GetSelectStmtIntf: IStatement;
393	>	procedure SetUpdateMode(const Value: TUpdateMode);
394	>	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
395	>
396	>	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
397	>	procedure AdjustRecordOnInsert(Buffer: Pointer);
398	>	function CanEdit: Boolean;
399	>	function CanInsert: Boolean;
400	>	function CanDelete: Boolean;
401	>	function CanRefresh: Boolean;
402	>	procedure CheckEditState;
403	>	procedure ClearBlobCache;
404	>	procedure ClearArrayCache;
405	>	procedure ClearIBLinks;
406	>	procedure CopyRecordBuffer(Source, Dest: Pointer);
407	>	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
408	>	procedure DoAfterDatabaseDisconnect(Sender: TObject);
409	>	procedure DoDatabaseFree(Sender: TObject);
410	>	procedure DoBeforeTransactionEnd(Sender: TObject; Action: TTransactionAction);
411	>	procedure DoAfterTransactionEnd(Sender: TObject);
412	>	procedure DoTransactionFree(Sender: TObject);
413	>	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
414	>	Buffer: PChar);
415	>	function GetDatabase: TIBDatabase;
416	>	function GetDeleteSQL: TStrings;
417	>	function GetInsertSQL: TStrings;
418	>	function GetSQLParams: ISQLParams;
419	>	function GetRefreshSQL: TStrings;
420	>	function GetSelectSQL: TStrings;
421	>	function GetStatementType: TIBSQLStatementTypes;
422	>	function GetModifySQL: TStrings;
423	>	function GetTransaction: TIBTransaction;
424	>	function GetParser: TSelectSQLParser;
425	>	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
426	>	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
427	>	Options: TLocateOptions): Boolean; virtual;
428	>	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
429	>	procedure InternalRevertRecord(RecordNumber: Integer); virtual;
430	>	function IsVisible(Buffer: PChar): Boolean;
431	>	procedure RegisterIBLink(Sender: TIBControlLink);
432	>	procedure UnRegisterIBLink(Sender: TIBControlLink);
433	>	procedure SaveOldBuffer(Buffer: PChar);
434	>	procedure SetBufferChunks(Value: Integer);
435	>	procedure SetDatabase(Value: TIBDatabase);
436	>	procedure SetDeleteSQL(Value: TStrings);
437	>	procedure SetInsertSQL(Value: TStrings);
438	>	procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
439	>	procedure SetRefreshSQL(Value: TStrings);
440	>	procedure SetSelectSQL(Value: TStrings);
441	>	procedure SetModifySQL(Value: TStrings);
442	>	procedure SetTransaction(Value: TIBTransaction);
443	>	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
444	>	procedure SetUniDirectional(Value: Boolean);
445	>	procedure RefreshParams;
446	>	function AdjustPosition(FCache: PChar; Offset: DWORD;
447	>	Origin: Integer): DWORD;
448	>	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
449	>	Buffer: PChar);
450	>	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
451	>	ReadOldBuffer: Boolean);
452	>	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
453	>	Buffer: PChar);
454	>	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
455	>	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
456	>	DoCheck: Boolean): TGetResult; virtual;
457	>
458	>	protected
459	>	procedure ActivateConnection;
460	>	function ActivateTransaction: Boolean;
461	>	procedure DeactivateTransaction;
462	>	procedure CheckDatasetClosed;
463	>	procedure CheckDatasetOpen;
464	>	function CreateParser: TSelectSQLParser; virtual;
465	>	procedure FieldDefsFromQuery(SourceQuery: TIBSQL);
466	>	function GetActiveBuf: PChar;
467	>	procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
468	>	procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
469	>	procedure InternalPrepare; virtual;
470	>	procedure InternalUnPrepare; virtual;
471	>	procedure InternalExecQuery; virtual;
472	>	procedure InternalRefreshRow; virtual;
473	>	procedure InternalSetParamsFromCursor; virtual;
474	>	procedure CheckNotUniDirectional;
475	>	procedure SQLChanging(Sender: TObject); virtual;
476	>	procedure SQLChanged(Sender: TObject); virtual;
477	>
478	>	{ IProviderSupport }
479	>	procedure PSEndTransaction(Commit: Boolean); override;
480	>	function PSExecuteStatement(const ASQL: string; AParams: TParams;
481	>	ResultSet: Pointer = nil): Integer; override;
482	>	function PsGetTableName: string; override;
483	>	function PSGetQuoteChar: string; override;
484	>	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
485	>	function PSInTransaction: Boolean; override;
486	>	function PSIsSQLBased: Boolean; override;
487	>	function PSIsSQLSupported: Boolean; override;
488	>	procedure PSStartTransaction; override;
489	>	procedure PSReset; override;
490	>	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
491	>
492	>	{ TDataSet support }
493	>	procedure InternalInsert; override;
494	>	procedure InitRecord(Buffer: PChar); override;
495	>	procedure Disconnect; virtual;
496	>	function ConstraintsStored: Boolean;
497	>	procedure ClearCalcFields(Buffer: PChar); override;
498	>	function AllocRecordBuffer: PChar; override;
499	>	procedure DoBeforeDelete; override;
500	>	procedure DoAfterDelete; override;
501	>	procedure DoBeforeEdit; override;
502	>	procedure DoAfterEdit; override;
503	>	procedure DoBeforeInsert; override;
504	>	procedure DoAfterInsert; override;
505	>	procedure DoBeforeClose; override;
506	>	procedure DoBeforeOpen; override;
507	>	procedure DoBeforePost; override;
508	>	procedure DoAfterPost; override;
509	>	procedure FreeRecordBuffer(var Buffer: PChar); override;
510	>	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
511	>	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
512	>	function GetCanModify: Boolean; override;
513	>	function GetDataSource: TDataSource; override;
514	>	function GetDBAliasName(FieldNo: integer): string;
515	>	function GetFieldDefFromAlias(aliasName: string): TFieldDef;
516	>	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
517	>	function GetRecNo: Integer; override;
518	>	function GetRecord(Buffer: PChar; GetMode: TGetMode;
519	>	DoCheck: Boolean): TGetResult; override;
520	>	function GetRecordCount: Integer; override;
521	>	function GetRecordSize: Word; override;
522	>	procedure InternalAutoCommit;
523	>	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
524	>	procedure InternalCancel; override;
525	>	procedure InternalClose; override;
526	>	procedure InternalDelete; override;
527	>	procedure InternalFirst; override;
528	>	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
529	>	procedure InternalGotoBookmark(Bookmark: Pointer); override;
530	>	procedure InternalHandleException; override;
531	>	procedure InternalInitFieldDefs; override;
532	>	procedure InternalInitRecord(Buffer: PChar); override;
533	>	procedure InternalLast; override;
534	>	procedure InternalOpen; override;
535	>	procedure InternalPost; override;
536	>	procedure InternalRefresh; override;
537	>	procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
538	>	procedure InternalSetToRecord(Buffer: PChar); override;
539	>	function IsCursorOpen: Boolean; override;
540	>	procedure Loaded; override;
541	>	procedure ReQuery;
542	>	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
543	>	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
544	>	procedure SetCachedUpdates(Value: Boolean);
545	>	procedure SetDataSource(Value: TDataSource);
546	>	procedure SetGenerateParamNames(AValue: Boolean); virtual;
547	>	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
548	>	procedure SetFieldData(Field : TField; Buffer : Pointer;
549	>	NativeFormat : Boolean); overload; override;
550	>	procedure SetRecNo(Value: Integer); override;
551	>
552	>	protected
553	>	{Likely to be made public by descendant classes}
554	>	property AutoCommit: TIBAutoCommit read FAutoCommit write FAutoCommit default acDisabled;
555	>	property SQLParams: ISQLParams read GetSQLParams;
556	>	property Params: ISQLParams read GetSQLParams;
557	>	property InternalPrepared: Boolean read FInternalPrepared;
558	>	property QDelete: TIBSQL read FQDelete;
559	>	property QInsert: TIBSQL read FQInsert;
560	>	property QRefresh: TIBSQL read FQRefresh;
561	>	property QSelect: TIBSQL read FQSelect;
562	>	property QModify: TIBSQL read FQModify;
563	>	property StatementType: TIBSQLStatementTypes read GetStatementType;
564	>	property SelectStmtHandle: IStatement read GetSelectStmtIntf;
565	>
566	>	{Likely to be made published by descendant classes}
567	>	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
568	>	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
569	>	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
570	>	property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
571	>	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
572	>	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
573	>	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
574	>	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
575	>	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
576	>	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
577	>	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
578	>	property Parser: TSelectSQLParser read GetParser;
579	>	property BaseSQLSelect: TStrings read FBaseSQLSelect;
580	>
581	>	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
582	>	write FBeforeDatabaseDisconnect;
583	>	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
584	>	write FAfterDatabaseDisconnect;
585	>	property DatabaseFree: TNotifyEvent read FDatabaseFree
586	>	write FDatabaseFree;
587	>	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
588	>	write FBeforeTransactionEnd;
589	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
590	>	write FAfterTransactionEnd;
591	>	property TransactionFree: TNotifyEvent read FTransactionFree
592	>	write FTransactionFree;
593	>	property OnValidatePost: TOnValidatePost read FOnValidatePost write FOnValidatePost;
594	>
595	>	public
596	>	constructor Create(AOwner: TComponent); override;
597	>	destructor Destroy; override;
598	>	procedure ApplyUpdates;
599	>	function CachedUpdateStatus: TCachedUpdateStatus;
600	>	procedure CancelUpdates;
601	>	function GetFieldPosition(AliasName: string): integer;
602	>	procedure FetchAll;
603	>	function LocateNext(const KeyFields: string; const KeyValues: Variant;
604	>	Options: TLocateOptions): Boolean;
605	>	procedure RecordModified(Value: Boolean);
606	>	procedure RevertRecord;
607	>	procedure Undelete;
608	>	procedure ResetParser; virtual;
609	>	function HasParser: boolean;
610	>
611	>	{ TDataSet support methods }
612	>	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
613	>	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
614	>	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
615	>	function GetArray(Field: TIBArrayField): IArray;
616	>	procedure SetArrayIntf(AnArray: IArray; Field: TIBArrayField);
617	>	function GetCurrentRecord(Buffer: PChar): Boolean; override;
618	>	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
619	>	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
620	>	function GetFieldData(Field : TField; Buffer : Pointer;
621	>	NativeFormat : Boolean) : Boolean; overload; override;
622	>	property GenerateParamNames: Boolean read FGenerateParamNames write SetGenerateParamNames;
623	>	function Locate(const KeyFields: string; const KeyValues: Variant;
624	>	Options: TLocateOptions): Boolean; override;
625	>	function Lookup(const KeyFields: string; const KeyValues: Variant;
626	>	const ResultFields: string): Variant; override;
627	>	function UpdateStatus: TUpdateStatus; override;
628	>	function IsSequenced: Boolean; override;
629	>	procedure Post; override;
630	>	function ParamByName(ParamName: String): ISQLParam;
631	>	property ArrayFieldCount: integer read FArrayFieldCount;
632	>	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
633	>	property UpdatesPending: Boolean read FUpdatesPending;
634	>	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
635	>	write SetUpdateRecordTypes;
636	>	property DataSetCloseAction: TDataSetCloseAction
637	>	read FDataSetCloseAction write FDataSetCloseAction;
638	>
639	>	published
640	>	property AllowAutoActivateTransaction: Boolean read FAllowAutoActivateTransaction
641	>	write FAllowAutoActivateTransaction;
642	>	property Database: TIBDatabase read GetDatabase write SetDatabase;
643	>	property Transaction: TIBTransaction read GetTransaction
644	>	write SetTransaction;
645	>	property ForcedRefresh: Boolean read FForcedRefresh
646	>	write FForcedRefresh default False;
647	>	property AutoCalcFields;
648	>
649	>	property AfterCancel;
650	>	property AfterClose;
651	>	property AfterDelete;
652	>	property AfterEdit;
653	>	property AfterInsert;
654	>	property AfterOpen;
655	>	property AfterPost;
656	>	property AfterRefresh;
657	>	property AfterScroll;
658	>	property BeforeCancel;
659	>	property BeforeClose;
660	>	property BeforeDelete;
661	>	property BeforeEdit;
662	>	property BeforeInsert;
663	>	property BeforeOpen;
664	>	property BeforePost;
665	>	property BeforeRefresh;
666	>	property BeforeScroll;
667	>	property OnCalcFields;
668	>	property OnDeleteError;
669	>	property OnEditError;
670	>	property OnNewRecord;
671	>	property OnPostError;
672	>	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
673	>	write FOnUpdateError;
674	>	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
675	>	write FOnUpdateRecord;
676	>	end;
677	>
678	>	TIBParserDataSet = class(TIBCustomDataSet)
679	>	public
680	>	property Parser;
681	>	end;
682	>
683	>	TIBDataSet = class(TIBParserDataSet)
684	>	private
685	>	function GetPrepared: Boolean;
686	>
687	>	protected
688	>	procedure SetFiltered(Value: Boolean); override;
689	>	procedure InternalOpen; override;
690	>
691	>	public
692	>	procedure Prepare;
693	>	procedure UnPrepare;
694	>	procedure BatchInput(InputObject: TIBBatchInput);
695	>	procedure BatchOutput(OutputObject: TIBBatchOutput);
696	>	procedure ExecSQL;
697	>
698	>	public
699	>	property Params;
700	>	property Prepared : Boolean read GetPrepared;
701	>	property QDelete;
702	>	property QInsert;
703	>	property QRefresh;
704	>	property QSelect;
705	>	property QModify;
706	>	property StatementType;
707	>	property SelectStmtHandle;
708	>	property BaseSQLSelect;
709	>
710	>	published
711	>	{ TIBCustomDataSet }
712	>	property AutoCommit;
713	>	property BufferChunks;
714	>	property CachedUpdates;
715	>	property DeleteSQL;
716	>	property InsertSQL;
717	>	property RefreshSQL;
718	>	property SelectSQL;
719	>	property ModifySQL;
720	>	property GeneratorField;
721	>	property GenerateParamNames;
722	>	property ParamCheck;
723	>	property UniDirectional;
724	>	property Filtered;
725	>	property DataSetCloseAction;
726	>
727	>	property BeforeDatabaseDisconnect;
728	>	property AfterDatabaseDisconnect;
729	>	property DatabaseFree;
730	>	property BeforeTransactionEnd;
731	>	property AfterTransactionEnd;
732	>	property TransactionFree;
733	>
734	>	{ TIBDataSet }
735	>	property Active;
736	>	property AutoCalcFields;
737	>	property DataSource read GetDataSource write SetDataSource;
738	>
739	>	property AfterCancel;
740	>	property AfterClose;
741	>	property AfterDelete;
742	>	property AfterEdit;
743	>	property AfterInsert;
744	>	property AfterOpen;
745	>	property AfterPost;
746	>	property AfterScroll;
747	>	property BeforeCancel;
748	>	property BeforeClose;
749	>	property BeforeDelete;
750	>	property BeforeEdit;
751	>	property BeforeInsert;
752	>	property BeforeOpen;
753	>	property BeforePost;
754	>	property BeforeScroll;
755	>	property OnCalcFields;
756	>	property OnDeleteError;
757	>	property OnEditError;
758	>	property OnFilterRecord;
759	>	property OnNewRecord;
760	>	property OnPostError;
761	>	property OnValidatePost;
762	>	end;
763	>
764	>	{ TIBDSBlobStream }
765	>	TIBDSBlobStream = class(TStream)
766	>	private
767	>	FHasWritten: boolean;
768	>	protected
769	>	FField: TField;
770	>	FBlobStream: TIBBlobStream;
771	>	function  GetSize: Int64; override;
772	>	public
773	>	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
774	>	Mode: TBlobStreamMode);
775	>	destructor Destroy; override;
776	>	function Read(var Buffer; Count: Longint): Longint; override;
777	>	function Seek(Offset: Longint; Origin: Word): Longint; override;
778	>	procedure SetSize(NewSize: Longint); override;
779	>	function Write(const Buffer; Count: Longint): Longint; override;
780	>	end;
781	>
782	>	{Extended Field Def for character set info}
783	>
784	>	{ TIBFieldDef }
785	>
786	>	TIBFieldDef = class(TFieldDef)
787	>	private
788	>	FArrayBounds: TArrayBounds;
789	>	FArrayDimensions: integer;
790	>	FCharacterSetName: RawByteString;
791	>	FCharacterSetSize: integer;
792	>	FCodePage: TSystemCodePage;
793	>	FRelationName: string;
794	>	FDataSize: integer;
795	>	published
796	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
797	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
798	>	property CodePage: TSystemCodePage read FCodePage write FCodePage;
799	>	property DataSize: integer read FDataSize write FDataSize;
800	>	property RelationName: string read FRelationName write FRelationName;
801	>	property ArrayDimensions: integer read FArrayDimensions write FArrayDimensions;
802	>	property ArrayBounds: TArrayBounds read FArrayBounds write FArrayBounds;
803	>	end;
804	>
805	>	const
806	>	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
807	>	nil,                { ftUnknown }
808	>	TIBStringField,     { ftString }
809	>	TSmallintField,     { ftSmallint }
810	>	TIntegerField,      { ftInteger }
811	>	TWordField,         { ftWord }
812	>	TBooleanField,      { ftBoolean }
813	>	TFloatField,        { ftFloat }
814	>	TCurrencyField,     { ftCurrency }
815	>	TIBBCDField,        { ftBCD }
816	>	TDateField,         { ftDate }
817	>	TTimeField,         { ftTime }
818	>	TDateTimeField,     { ftDateTime }
819	>	TBytesField,        { ftBytes }
820	>	TVarBytesField,     { ftVarBytes }
821	>	TAutoIncField,      { ftAutoInc }
822	>	TBlobField,         { ftBlob }
823	>	TIBMemoField,       { ftMemo }
824	>	TGraphicField,      { ftGraphic }
825	>	TBlobField,         { ftFmtMemo }
826	>	TBlobField,         { ftParadoxOle }
827	>	TBlobField,         { ftDBaseOle }
828	>	TBlobField,         { ftTypedBinary }
829	>	nil,                { ftCursor }
830	>	TStringField,       { ftFixedChar }
831	>	nil,    { ftWideString }
832	>	TLargeIntField,     { ftLargeInt }
833	>	nil,          { ftADT }
834	>	TIBArrayField,        { ftArray }
835	>	nil,    { ftReference }
836	>	nil,     { ftDataSet }
837	>	TBlobField,         { ftOraBlob }
838	>	TMemoField,         { ftOraClob }
839	>	TVariantField,      { ftVariant }
840	>	nil,    { ftInterface }
841	>	nil,     { ftIDispatch }
842	>	TGuidField,        { ftGuid }
843	>	TDateTimeField,    {ftTimestamp}
844	>	TIBBCDField,       {ftFMTBcd}
845	>	nil,  {ftFixedWideChar}
846	>	nil);   {ftWideMemo}
847	>	(*
848	>	TADTField,          { ftADT }
849	>	TArrayField,        { ftArray }
850	>	TReferenceField,    { ftReference }
851	>	TDataSetField,     { ftDataSet }
852	>	TBlobField,         { ftOraBlob }
853	>	TMemoField,         { ftOraClob }
854	>	TVariantField,      { ftVariant }
855	>	TInterfaceField,    { ftInterface }
856	>	TIDispatchField,     { ftIDispatch }
857	>	TGuidField);        { ftGuid } *)
858	>	(*var
859	>	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
860	>
861	>	implementation
862	>
863	>	uses Variants, FmtBCD, LazUTF8, FBMessages, IBQuery;
864	>
865	>	const FILE_BEGIN = 0;
866	>	FILE_CURRENT = 1;
867	>	FILE_END = 2;
868	>
869	>	type
870	>
871	>	TFieldNode = class(TObject)
872	>	protected
873	>	FieldName : String;
874	>	COMPUTED_BLR : Boolean;
875	>	DEFAULT_VALUE : boolean;
876	>	NextField : TFieldNode;
877	>	end;
878	>
879	>	TRelationNode = class(TObject)
880	>	protected
881	>	RelationName : String;
882	>	FieldNodes : TFieldNode;
883	>	NextRelation : TRelationNode;
884	>	end;
885	>
886	>
887	>	{  Copied from LCLProc in order to avoid LCL dependency
888	>
889	>	Ensures the covenient look of multiline string
890	>	when displaying it in the single line
891	>	* Replaces CR and LF with spaces
892	>	* Removes duplicate spaces
893	>	}
894	>	function TextToSingleLine(const AText: string): string;
895	>	var
896	>	str: string;
897	>	i, wstart, wlen: Integer;
898	>	begin
899	>	str := Trim(AText);
900	>	wstart := 0;
901	>	wlen := 0;
902	>	i := 1;
903	>	while i < Length(str) - 1 do
904	>	begin
905	>	if (str[i] in [' ', #13, #10]) then
906	>	begin
907	>	if (wstart = 0) then
908	>	begin
909	>	wstart := i;
910	>	wlen := 1;
911	>	end else
912	>	Inc(wlen);
913	>	end else
914	>	begin
915	>	if wstart > 0 then
916	>	begin
917	>	str[wstart] := ' ';
918	>	Delete(str, wstart+1, wlen-1);
919	>	Dec(i, wlen-1);
920	>	wstart := 0;
921	>	end;
922	>	end;
923	>	Inc(i);
924	>	end;
925	>	Result := str;
926	>	end;
927	>
928	>	{ TIBArray }
929	>
930	>	procedure TIBArray.EventHandler(Sender: IArray; Reason: TArrayEventReason);
931	>	begin
932	>	case Reason of
933	>	arChanging:
934	>	if FRecNo <> FField.Dataset.RecNo then
935	>	IBError(ibxeNotCurrentArray,[nil]);
936	>
937	>	arChanged:
938	>	FField.DataChanged;
939	>	end;
940	>	end;
941	>
942	>	constructor TIBArray.Create(aField: TIBArrayField; anArray: IArray);
943	>	begin
944	>	inherited Create;
945	>	FField := aField;
946	>	FArray := anArray;
947	>	FRecNo := FField.Dataset.RecNo;
948	>	FArray.AddEventHandler(EventHandler);
949	>	end;
950	>
951	>	destructor TIBArray.Destroy;
952	>	begin
953	>	FArray.RemoveEventHandler(EventHandler);
954	>	inherited Destroy;
955	>	end;
956	>
957	>	{ TIBArrayField }
958	>
959	>	function TIBArrayField.GetArrayIntf: IArray;
960	>	begin
961	>	Result := TIBCustomDataSet(DataSet).GetArray(self);
962	>	end;
963	>
964	>	function TIBArrayField.GetArrayID: TISC_QUAD;
965	>	begin
966	>	GetData(@Result);
967	>	end;
968	>
969	>	procedure TIBArrayField.SetArrayIntf(AValue: IArray);
970	>	begin
971	>	TIBCustomDataSet(DataSet).SetArrayIntf(AValue,self);
972	>	DataChanged;
973	>	end;
974	>
975	>	class procedure TIBArrayField.CheckTypeSize(AValue: Longint);
976	>	begin
977	>	//Ignore
978	>	end;
979	>
980	>	function TIBArrayField.GetAsString: string;
981	>	begin
982	>	Result := '(Array)';
983	>	end;
984	>
985	>	function TIBArrayField.GetDataSize: Integer;
986	>	begin
987	>	Result := sizeof(TISC_QUAD);
988	>	end;
989	>
990	>	procedure TIBArrayField.Bind(Binding: Boolean);
991	>	begin
992	>	inherited Bind(Binding);
993	>	if Binding then
994	>	begin
995	>	FCacheOffset := TIBCustomDataSet(DataSet).ArrayFieldCount;
996	>	Inc(TIBCustomDataSet(DataSet).FArrayFieldCount);
997	>	if FieldDef <> nil then
998	>	begin
999	>	FRelationName := TIBFieldDef(FieldDef).FRelationName;
1000	>	FArrayDimensions := TIBFieldDef(FieldDef).ArrayDimensions;
1001	>	FArrayBounds :=  TIBFieldDef(FieldDef).ArrayBounds;
1002	>	end;
1003	>	end;
1004	>	end;
1005	>
1006	>	constructor TIBArrayField.Create(AOwner: TComponent);
1007	>	begin
1008	>	inherited Create(AOwner);
1009	>	SetDataType(ftArray);
1010	>	end;
1011	>
1012	>	function TIBArrayField.CreateArray: IArray;
1013	>	begin
1014	>	with DataSet as TIBCustomDataSet do
1015	>	Result := Database.Attachment.CreateArray(Transaction.TransactionIntf,FRelationName,FieldName);
1016	>	end;
1017	>
1018	>	{ TIBMemoField }
1019	>
1020	>	function TIBMemoField.GetTruncatedText: string;
1021	>	begin
1022	>	Result := GetAsString;
1023	>
1024	>	if Result <> '' then
1025	>	begin
1026	>	case CharacterSetSize of
1027	>	1:
1028	>	if DisplayWidth = 0 then
1029	>	Result := TextToSingleLine(Result)
1030	>	else
1031	>	if Length(Result) > DisplayWidth then {Show truncation with elipses}
1032	>	Result := TextToSingleLine(system.copy(Result,1,DisplayWidth-3)) + '...';
1033	>
1034	>	{2: case 2 ignored. This should be handled by TIBWideMemo}
1035	>
1036	>	3, {Assume UNICODE_FSS is really UTF8}
1037	>	4: {Include GB18030 - assuming UTF8 routine work for this codeset}
1038	>	if DisplayWidth = 0 then
1039	>	Result := ValidUTF8String(TextToSingleLine(Result))
1040	>	else
1041	>	if UTF8Length(Result) > DisplayWidth then {Show truncation with elipses}
1042	>	Result := ValidUTF8String(TextToSingleLine(UTF8Copy(Result,1,DisplayWidth-3))) + '...';
1043	>	end;
1044	>	end
1045	>	end;
1046	>
1047	>	procedure TIBMemoField.Bind(Binding: Boolean);
1048	>	var IBFieldDef: TIBFieldDef;
1049	>	begin
1050	>	inherited Bind(Binding);
1051	>	if Binding and (FieldDef <> nil) then
1052	>	begin
1053	>	IBFieldDef := FieldDef as TIBFieldDef;
1054	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
1055	>	CharacterSetName := IBFieldDef.CharacterSetName;
1056	>	CodePage := IBFieldDef.CodePage;
1057	>	end;
1058	>	end;
1059	>
1060	>	function TIBMemoField.GetAsString: string;
1061	>	var s: RawByteString;
1062	>	begin
1063	>	s := inherited GetAsString;
1064	>	SetCodePage(s,CodePage,false);
1065	>	if (CodePage <> CP_NONE) and (CodePage <> CP_UTF8) then
1066	>	SetCodePage(s,CP_UTF8,true);  {LCL only accepts UTF8}
1067	>	Result := s;
1068	>	end;
1069	>
1070	>	function TIBMemoField.GetDefaultWidth: Longint;
1071	>	begin
1072	>	if DisplayTextAsClassName then
1073	>	Result := inherited
1074	>	else
1075	>	Result := 128;
1076	>	end;
1077	>
1078	>	procedure TIBMemoField.GetText(var AText: string; ADisplayText: Boolean);
1079	>	begin
1080	>	if ADisplayText then
1081	>	begin
1082	>	if not DisplayTextAsClassName and (CharacterSetName <> '') then
1083	>	AText := GetTruncatedText
1084	>	else
1085	>	inherited GetText(AText, ADisplayText);
1086	>	end
1087	>	else
1088	>	AText := GetAsString;
1089	>	end;
1090	>
1091	>	procedure TIBMemoField.SetAsString(const AValue: string);
1092	>	var s: RawByteString;
1093	>	begin
1094	>	s := AValue;
1095	>	if StringCodePage(s) <> CodePage then
1096	>	SetCodePage(s,CodePage,CodePage<>CP_NONE);
1097	>	inherited SetAsString(s);
1098	>	end;
1099	>
1100	>	constructor TIBMemoField.Create(AOwner: TComponent);
1101	>	begin
1102	>	inherited Create(AOwner);
1103	>	BlobType := ftMemo;
1104	>	FCodePage := CP_NONE;
1105	>	end;
1106	>
1107	>	{ TIBControlLink }
1108	>
1109	>	destructor TIBControlLink.Destroy;
1110	>	begin
1111	>	IBDataSet := nil;
1112	>	inherited Destroy;
1113	>	end;
1114	>
1115	>	procedure TIBControlLink.UpdateParams(Sender: TObject);
1116	>	begin
1117	>
1118	>	end;
1119	>
1120	>	procedure TIBControlLink.UpdateSQL(Sender: TObject);
1121	>	begin
1122	>
1123	>	end;
1124	>
1125	>	procedure TIBControlLink.SetIBDataSet(AValue: TIBCustomDataSet);
1126	>	begin
1127	>	if FTIBDataSet = AValue then Exit;
1128	>	if IBDataSet <> nil then
1129	>	IBDataSet.UnRegisterIBLink(self);
1130	>	FTIBDataSet := AValue;
1131	>	if IBDataSet <> nil then
1132	>	IBDataSet.RegisterIBLink(self);
1133	>	end;
1134	>
1135	>
1136	>	{ TIBStringField}
1137	>
1138	>	procedure TIBStringField.Bind(Binding: Boolean);
1139	>	var IBFieldDef: TIBFieldDef;
1140	>	begin
1141	>	inherited Bind(Binding);
1142	>	if Binding and (FieldDef <> nil) then
1143	>	begin
1144	>	IBFieldDef := FieldDef as TIBFieldDef;
1145	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
1146	>	CharacterSetName := IBFieldDef.CharacterSetName;
1147	>	FDataSize := IBFieldDef.DataSize + 1;
1148	>	if AutoFieldSize then
1149	>	Size := IBFieldDef.Size;
1150	>	CodePage := IBFieldDef.CodePage;
1151	>	end;
1152	>	end;
1153	>
1154	>	function TIBStringField.GetDataSize: Integer;
1155	>	begin
1156	>	Result := FDataSize;
1157	>	end;
1158	>
1159	>	constructor TIBStringField.Create(aOwner: TComponent);
1160	>	begin
1161	>	inherited Create(aOwner);
1162	>	FCharacterSetSize := 1;
1163	>	FCodePage := CP_NONE;
1164	>	FAutoFieldSize := true;
1165	>	end;
1166	>
1167	>	class procedure TIBStringField.CheckTypeSize(Value: Integer);
1168	>	begin
1169	>	{ don't check string size. all sizes valid }
1170	>	end;
1171	>
1172	>	function TIBStringField.GetAsString: string;
1173	>	begin
1174	>	if not GetValue(Result) then Result := '';
1175	>	end;
1176	>
1177	>	function TIBStringField.GetAsVariant: Variant;
1178	>	var
1179	>	S: string;
1180	>	begin
1181	>	if GetValue(S) then Result := S else Result := Null;
1182	>	end;
1183	>
1184	>	function TIBStringField.GetValue(var Value: string): Boolean;
1185	>	var
1186	>	Buffer: PChar;
1187	>	s: RawByteString;
1188	>	begin
1189	>	Buffer := nil;
1190	>	IBAlloc(Buffer, 0, DataSize);
1191	>	try
1192	>	Result := GetData(Buffer);
1193	>	if Result then
1194	>	begin
1195	>	s := strpas(Buffer);
1196	>	SetCodePage(s,CodePage,false);
1197	>	if (CodePage <> CP_NONE) and (CodePage <> CP_UTF8) then
1198	>	SetCodePage(s,CP_UTF8,true);  {LCL only accepts UTF8}
1199	>	Value := s;
1200	>	//      writeln(FieldName,': ', StringCodePage(Value),', ',Value);
1201	>	if Transliterate and (Value <> '') then
1202	>	DataSet.Translate(PChar(Value), PChar(Value), False);
1203	>	end
1204	>	finally
1205	>	FreeMem(Buffer);
1206	>	end;
1207	>	end;
1208	>
1209	>	procedure TIBStringField.SetAsString(const Value: string);
1210	>	var
1211	>	Buffer: PChar;
1212	>	s: RawByteString;
1213	>	begin
1214	>	Buffer := nil;
1215	>	IBAlloc(Buffer, 0, DataSize);
1216	>	try
1217	>	s := Value;
1218	>	if StringCodePage(s) <> CodePage then
1219	>	SetCodePage(s,CodePage,CodePage<>CP_NONE);
1220	>	StrLCopy(Buffer, PChar(s), DataSize-1);
1221	>	if Transliterate then
1222	>	DataSet.Translate(Buffer, Buffer, True);
1223	>	SetData(Buffer);
1224	>	finally
1225	>	FreeMem(Buffer);
1226	>	end;
1227	>	end;
1228	>
1229	>
1230	>	{ TIBBCDField }
1231	>
1232	>	constructor TIBBCDField.Create(AOwner: TComponent);
1233	>	begin
1234	>	inherited Create(AOwner);
1235	>	SetDataType(ftBCD);
1236	>	Size := 8;
1237	>	end;
1238	>
1239	>	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
1240	>	begin
1241	>	{ No need to check as the base type is currency, not BCD }
1242	>	end;
1243	>
1244	>	function TIBBCDField.GetAsCurrency: Currency;
1245	>	begin
1246	>	if not GetValue(Result) then
1247	>	Result := 0;
1248	>	end;
1249	>
1250	>	function TIBBCDField.GetAsString: string;
1251	>	var
1252	>	C: System.Currency;
1253	>	begin
1254	>	if GetValue(C) then
1255	>	Result := CurrToStr(C)
1256	>	else
1257	>	Result := '';
1258	>	end;
1259	>
1260	>	function TIBBCDField.GetAsVariant: Variant;
1261	>	var
1262	>	C: System.Currency;
1263	>	begin
1264	>	if GetValue(C) then
1265	>	Result := C
1266	>	else
1267	>	Result := Null;
1268	>	end;
1269	>
1270	>	function TIBBCDField.GetDataSize: Integer;
1271	>	begin
1272	>	{$IFDEF TBCDFIELD_IS_BCD}
1273	>	Result := 8;
1274	>	{$ELSE}
1275	>	Result := inherited GetDataSize
1276	>	{$ENDIF}
1277	>	end;
1278	>
1279	>	{ TIBDataLink }
1280	>
1281	>	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
1282	>	begin
1283	>	inherited Create;
1284	>	FDataSet := ADataSet;
1285	>	end;
1286	>
1287	>	destructor TIBDataLink.Destroy;
1288	>	begin
1289	>	FDataSet.FDataLink := nil;
1290	>	inherited Destroy;
1291	>	end;
1292	>
1293	>
1294	>	procedure TIBDataLink.ActiveChanged;
1295	>	begin
1296	>	if FDataSet.Active then
1297	>	FDataSet.RefreshParams;
1298	>	end;
1299	>
1300	>
1301	>	function TIBDataLink.GetDetailDataSet: TDataSet;
1302	>	begin
1303	>	Result := FDataSet;
1304	>	end;
1305	>
1306	>	procedure TIBDataLink.RecordChanged(Field: TField);
1307	>	begin
1308	>	if (Field = nil) and FDataSet.Active then
1309	>	FDataSet.RefreshParams;
1310	>	end;
1311	>
1312	>	procedure TIBDataLink.CheckBrowseMode;
1313	>	begin
1314	>	if FDataSet.Active then
1315	>	FDataSet.CheckBrowseMode;
1316	>	end;
1317	>
1318	>	{ TIBCustomDataSet }
1319	>
1320	>	constructor TIBCustomDataSet.Create(AOwner: TComponent);
1321	>	begin
1322	>	inherited Create(AOwner);
1323	>	FBase := TIBBase.Create(Self);
1324	>	FIBLinks := TList.Create;
1325	>	FCurrentRecord := -1;
1326	>	FDeletedRecords := 0;
1327	>	FUniDirectional := False;
1328	>	FBufferChunks := BufferCacheSize;
1329	>	FBlobStreamList := TList.Create;
1330	>	FArrayList := TList.Create;
1331	>	FGeneratorField := TIBGenerator.Create(self);
1332	>	FDataLink := TIBDataLink.Create(Self);
1333	>	FQDelete := TIBSQL.Create(Self);
1334	>	FQDelete.OnSQLChanging := SQLChanging;
1335	>	FQDelete.GoToFirstRecordOnExecute := False;
1336	>	FQInsert := TIBSQL.Create(Self);
1337	>	FQInsert.OnSQLChanging := SQLChanging;
1338	>	FQInsert.GoToFirstRecordOnExecute := False;
1339	>	FQRefresh := TIBSQL.Create(Self);
1340	>	FQRefresh.OnSQLChanging := SQLChanging;
1341	>	FQRefresh.GoToFirstRecordOnExecute := False;
1342	>	FQSelect := TIBSQL.Create(Self);
1343	>	FQSelect.OnSQLChanging := SQLChanging;
1344	>	FQSelect.OnSQLChanged := SQLChanged;
1345	>	FQSelect.GoToFirstRecordOnExecute := False;
1346	>	FQModify := TIBSQL.Create(Self);
1347	>	FQModify.OnSQLChanging := SQLChanging;
1348	>	FQModify.GoToFirstRecordOnExecute := False;
1349	>	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
1350	>	FParamCheck := True;
1351	>	FGenerateParamNames := False;
1352	>	FForcedRefresh := False;
1353	>	FAutoCommit:= acDisabled;
1354	>	FDataSetCloseAction := dcDiscardChanges;
1355	>	{Bookmark Size is Integer for IBX}
1356	>	BookmarkSize := SizeOf(Integer);
1357	>	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
1358	>	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
1359	>	FBase.OnDatabaseFree := DoDatabaseFree;
1360	>	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
1361	>	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
1362	>	FBase.OnTransactionFree := DoTransactionFree;
1363	>	if AOwner is TIBDatabase then
1364	>	Database := TIBDatabase(AOwner)
1365	>	else
1366	>	if AOwner is TIBTransaction then
1367	>	Transaction := TIBTransaction(AOwner);
1368	>	FBaseSQLSelect := TStringList.Create;
1369	>	end;
1370	>
1371	>	destructor TIBCustomDataSet.Destroy;
1372	>	begin
1373	>	if Active then Active := false;
1374	>	if assigned(FGeneratorField) then FGeneratorField.Free;
1375	>	FDataLink.Free;
1376	>	FBase.Free;
1377	>	ClearBlobCache;
1378	>	ClearIBLinks;
1379	>	FIBLinks.Free;
1380	>	FBlobStreamList.Free;
1381	>	FArrayList.Free;
1382	>	FreeMem(FBufferCache);
1383	>	FBufferCache := nil;
1384	>	FreeMem(FOldBufferCache);
1385	>	FOldBufferCache := nil;
1386	>	FCacheSize := 0;
1387	>	FOldCacheSize := 0;
1388	>	FMappedFieldPosition := nil;
1389	>	if assigned(FBaseSQLSelect) then FBaseSQLSelect.Free;
1390	>	if assigned(FParser) then FParser.Free;
1391	>	inherited Destroy;
1392	>	end;
1393	>
1394	>	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
1395	>	TGetResult;
1396	>	begin
1397	>	while not IsVisible(Buffer) do
1398	>	begin
1399	>	if GetMode = gmPrior then
1400	>	begin
1401	>	Dec(FCurrentRecord);
1402	>	if FCurrentRecord = -1 then
1403	>	begin
1404	>	result := grBOF;
1405	>	exit;
1406	>	end;
1407	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1408	>	end
1409	>	else begin
1410	>	Inc(FCurrentRecord);
1411	>	if (FCurrentRecord = FRecordCount) then
1412	>	begin
1413	>	if (not FQSelect.EOF) and FQSelect.Next  then
1414	>	begin
1415	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
1416	>	Inc(FRecordCount);
1417	>	end
1418	>	else begin
1419	>	result := grEOF;
1420	>	exit;
1421	>	end;
1422	>	end
1423	>	else
1424	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1425	>	end;
1426	>	end;
1427	>	result := grOK;
1428	>	end;
1429	>
1430	>	procedure TIBCustomDataSet.ApplyUpdates;
1431	>	var
1432	>	CurBookmark: TBookmark;
1433	>	Buffer: PRecordData;
1434	>	CurUpdateTypes: TIBUpdateRecordTypes;
1435	>	UpdateAction: TIBUpdateAction;
1436	>	UpdateKind: TUpdateKind;
1437	>	bRecordsSkipped: Boolean;
1438	>
1439	>	procedure GetUpdateKind;
1440	>	begin
1441	>	case Buffer^.rdCachedUpdateStatus of
1442	>	cusModified:
1443	>	UpdateKind := ukModify;
1444	>	cusInserted:
1445	>	UpdateKind := ukInsert;
1446	>	else
1447	>	UpdateKind := ukDelete;
1448	>	end;
1449	>	end;
1450	>
1451	>	procedure ResetBufferUpdateStatus;
1452	>	begin
1453	>	case Buffer^.rdCachedUpdateStatus of
1454	>	cusModified:
1455	>	begin
1456	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1457	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1458	>	end;
1459	>	cusInserted:
1460	>	begin
1461	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1462	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1463	>	end;
1464	>	cusDeleted:
1465	>	begin
1466	>	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
1467	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1468	>	end;
1469	>	end;
1470	>	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
1471	>	end;
1472	>
1473	>	procedure UpdateUsingOnUpdateRecord;
1474	>	begin
1475	>	UpdateAction := uaFail;
1476	>	try
1477	>	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
1478	>	except
1479	>	on E: Exception do
1480	>	begin
1481	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1482	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1483	>	if UpdateAction = uaFail then
1484	>	raise;
1485	>	end;
1486	>	end;
1487	>	end;
1488	>
1489	>	procedure UpdateUsingUpdateObject;
1490	>	begin
1491	>	try
1492	>	FUpdateObject.Apply(UpdateKind,PChar(Buffer));
1493	>	ResetBufferUpdateStatus;
1494	>	except
1495	>	on E: Exception do
1496	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1497	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1498	>	end;
1499	>	end;
1500	>
1501	>	procedure UpdateUsingInternalquery;
1502	>	begin
1503	>	try
1504	>	case Buffer^.rdCachedUpdateStatus of
1505	>	cusModified:
1506	>	InternalPostRecord(FQModify, Buffer);
1507	>	cusInserted:
1508	>	InternalPostRecord(FQInsert, Buffer);
1509	>	cusDeleted:
1510	>	InternalDeleteRecord(FQDelete, Buffer);
1511	>	end;
1512	>	except
1513	>	on E: EIBError do begin
1514	>	UpdateAction := uaFail;
1515	>	if Assigned(FOnUpdateError) then
1516	>	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
1517	>	case UpdateAction of
1518	>	uaFail: raise;
1519	>	uaAbort: SysUtils.Abort;
1520	>	uaSkip: bRecordsSkipped := True;
1521	>	end;
1522	>	end;
1523	>	end;
1524	>	end;
1525	>
1526	>	begin
1527	>	if State in [dsEdit, dsInsert] then
1528	>	Post;
1529	>	FBase.CheckDatabase;
1530	>	FBase.CheckTransaction;
1531	>	DisableControls;
1532	>	CurBookmark := Bookmark;
1533	>	CurUpdateTypes := FUpdateRecordTypes;
1534	>	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1535	>	try
1536	>	First;
1537	>	bRecordsSkipped := False;
1538	>	while not EOF do
1539	>	begin
1540	>	Buffer := PRecordData(GetActiveBuf);
1541	>	GetUpdateKind;
1542	>	UpdateAction := uaApply;
1543	>	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
1544	>	begin
1545	>	if (Assigned(FOnUpdateRecord)) then
1546	>	UpdateUsingOnUpdateRecord
1547	>	else
1548	>	if Assigned(FUpdateObject) then
1549	>	UpdateUsingUpdateObject;
1550	>	case UpdateAction of
1551	>	uaFail:
1552	>	IBError(ibxeUserAbort, [nil]);
1553	>	uaAbort:
1554	>	SysUtils.Abort;
1555	>	uaApplied:
1556	>	ResetBufferUpdateStatus;
1557	>	uaSkip:
1558	>	bRecordsSkipped := True;
1559	>	uaRetry:
1560	>	Continue;
1561	>	end;
1562	>	end;
1563	>	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
1564	>	begin
1565	>	UpdateUsingInternalquery;
1566	>	UpdateAction := uaApplied;
1567	>	end;
1568	>	Next;
1569	>	end;
1570	>	FUpdatesPending := bRecordsSkipped;
1571	>	finally
1572	>	FUpdateRecordTypes := CurUpdateTypes;
1573	>	Bookmark := CurBookmark;
1574	>	EnableControls;
1575	>	end;
1576	>	end;
1577	>
1578	>	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1579	>	begin
1580	>	FQSelect.BatchInput(InputObject);
1581	>	end;
1582	>
1583	>	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1584	>	var
1585	>	Qry: TIBSQL;
1586	>	begin
1587	>	Qry := TIBSQL.Create(Self);
1588	>	try
1589	>	Qry.Database := FBase.Database;
1590	>	Qry.Transaction := FBase.Transaction;
1591	>	Qry.SQL.Assign(FQSelect.SQL);
1592	>	Qry.BatchOutput(OutputObject);
1593	>	finally
1594	>	Qry.Free;
1595	>	end;
1596	>	end;
1597	>
1598	>	procedure TIBCustomDataSet.CancelUpdates;
1599	>	var
1600	>	CurUpdateTypes: TIBUpdateRecordTypes;
1601	>	begin
1602	>	if State in [dsEdit, dsInsert] then
1603	>	Post;
1604	>	if FCachedUpdates and FUpdatesPending then
1605	>	begin
1606	>	DisableControls;
1607	>	CurUpdateTypes := UpdateRecordTypes;
1608	>	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1609	>	try
1610	>	First;
1611	>	while not EOF do
1612	>	begin
1613	>	if UpdateStatus = usInserted then
1614	>	RevertRecord
1615	>	else
1616	>	begin
1617	>	RevertRecord;
1618	>	Next;
1619	>	end;
1620	>	end;
1621	>	finally
1622	>	UpdateRecordTypes := CurUpdateTypes;
1623	>	First;
1624	>	FUpdatesPending := False;
1625	>	EnableControls;
1626	>	end;
1627	>	end;
1628	>	end;
1629	>
1630	>	function TIBCustomDataSet.GetFieldPosition(AliasName: string): integer;
1631	>	var i: integer;
1632	>	Prepared: boolean;
1633	>	begin
1634	>	Result := 0;
1635	>	Prepared := FInternalPrepared;
1636	>	if not Prepared then
1637	>	InternalPrepare;
1638	>	try
1639	>	for i := 0 to Length(FAliasNameList) - 1 do
1640	>	if FAliasNameList[i] = AliasName then
1641	>	begin
1642	>	Result := i + 1;
1643	>	Exit
1644	>	end;
1645	>	finally
1646	>	if not Prepared then
1647	>	InternalUnPrepare;
1648	>	end;
1649	>	end;
1650	>
1651	>	procedure TIBCustomDataSet.ActivateConnection;
1652	>	begin
1653	>	if not Assigned(Database) then
1654	>	IBError(ibxeDatabaseNotAssigned, [nil]);
1655	>	if not Assigned(Transaction) then
1656	>	IBError(ibxeTransactionNotAssigned, [nil]);
1657	>	if not Database.Connected then Database.Open;
1658	>	end;
1659	>
1660	>	function TIBCustomDataSet.ActivateTransaction: Boolean;
1661	>	begin
1662	>	Result := False;
1663	>	if AllowAutoActivateTransaction or (csDesigning in ComponentState) then
1664	>	begin
1665	>	if not Assigned(Transaction) then
1666	>	IBError(ibxeTransactionNotAssigned, [nil]);
1667	>	if not Transaction.Active then
1668	>	begin
1669	>	Result := True;
1670	>	Transaction.StartTransaction;
1671	>	FDidActivate := True;
1672	>	end;
1673	>	end;
1674	>	end;
1675	>
1676	>	procedure TIBCustomDataSet.DeactivateTransaction;
1677	>	var
1678	>	i: Integer;
1679	>	begin
1680	>	if not Assigned(Transaction) then
1681	>	IBError(ibxeTransactionNotAssigned, [nil]);
1682	>	with Transaction do
1683	>	begin
1684	>	for i := 0 to SQLObjectCount - 1 do
1685	>	begin
1686	>	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1687	>	begin
1688	>	if TDataSet(SQLObjects[i].owner).Active then
1689	>	begin
1690	>	FDidActivate := False;
1691	>	exit;
1692	>	end;
1693	>	end;
1694	>	end;
1695	>	end;
1696	>	FInternalPrepared := False;
1697	>	if Transaction.InTransaction then
1698	>	Transaction.Commit;
1699	>	FDidActivate := False;
1700	>	end;
1701	>
1702	>	procedure TIBCustomDataSet.CheckDatasetClosed;
1703	>	begin
1704	>	if FOpen then
1705	>	IBError(ibxeDatasetOpen, [nil]);
1706	>	end;
1707	>
1708	>	procedure TIBCustomDataSet.CheckDatasetOpen;
1709	>	begin
1710	>	if not FOpen then
1711	>	IBError(ibxeDatasetClosed, [nil]);
1712	>	end;
1713	>
1714	>	function TIBCustomDataSet.CreateParser: TSelectSQLParser;
1715	>	begin
1716	>	Result := TSelectSQLParser.Create(self,FBaseSQLSelect);
1717	>	Result.OnSQLChanging := SQLChanging
1718	>	end;
1719	>
1720	>	procedure TIBCustomDataSet.CheckNotUniDirectional;
1721	>	begin
1722	>	if UniDirectional then
1723	>	IBError(ibxeDataSetUniDirectional, [nil]);
1724	>	end;
1725	>
1726	>	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1727	>	begin
1728	>	with PRecordData(Buffer)^ do
1729	>	if (State = dsInsert) and (not Modified) then
1730	>	begin
1731	>	rdRecordNumber := FRecordCount;
1732	>	FCurrentRecord := FRecordCount;
1733	>	end;
1734	>	end;
1735	>
1736	>	function TIBCustomDataSet.CanEdit: Boolean;
1737	>	var
1738	>	Buff: PRecordData;
1739	>	begin
1740	>	Buff := PRecordData(GetActiveBuf);
1741	>	result := (FQModify.SQL.Text <> '') or
1742	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1743	>	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1744	>	(FCachedUpdates));
1745	>	end;
1746	>
1747	>	function TIBCustomDataSet.CanInsert: Boolean;
1748	>	begin
1749	>	result := (FQInsert.SQL.Text <> '') or
1750	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1751	>	end;
1752	>
1753	>	function TIBCustomDataSet.CanDelete: Boolean;
1754	>	begin
1755	>	if (FQDelete.SQL.Text <> '') or
1756	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1757	>	result := True
1758	>	else
1759	>	result := False;
1760	>	end;
1761	>
1762	>	function TIBCustomDataSet.CanRefresh: Boolean;
1763	>	begin
1764	>	result := (FQRefresh.SQL.Text <> '') or
1765	>	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1766	>	end;
1767	>
1768	>	procedure TIBCustomDataSet.CheckEditState;
1769	>	begin
1770	>	case State of
1771	>	{ Check all the wsEditMode types }
1772	>	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1773	>	dsNewValue, dsInternalCalc :
1774	>	begin
1775	>	if (State in [dsEdit]) and (not CanEdit) then
1776	>	IBError(ibxeCannotUpdate, [nil]);
1777	>	if (State in [dsInsert]) and (not CanInsert) then
1778	>	IBError(ibxeCannotInsert, [nil]);
1779	>	end;
1780	>	else
1781	>	IBError(ibxeNotEditing, [])
1782	>	end;
1783	>	end;
1784	>
1785	>	procedure TIBCustomDataSet.ClearBlobCache;
1786	>	var
1787	>	i: Integer;
1788	>	begin
1789	>	for i := 0 to FBlobStreamList.Count - 1 do
1790	>	begin
1791	>	TIBBlobStream(FBlobStreamList[i]).Free;
1792	>	FBlobStreamList[i] := nil;
1793	>	end;
1794	>	FBlobStreamList.Pack;
1795	>	end;
1796	>
1797	>	procedure TIBCustomDataSet.ClearArrayCache;
1798	>	var
1799	>	i: Integer;
1800	>	begin
1801	>	for i := 0 to FArrayList.Count - 1 do
1802	>	begin
1803	>	TIBArray(FArrayList[i]).Free;
1804	>	FArrayList[i] := nil;
1805	>	end;
1806	>	FArrayList.Pack;
1807	>	end;
1808	>
1809	>	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1810	>	begin
1811	>	Move(Source^, Dest^, FRecordBufferSize);
1812	>	end;
1813	>
1814	>	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1815	>	begin
1816	>	if Active then
1817	>	Active := False;
1818	>	InternalUnPrepare;
1819	>	if Assigned(FBeforeDatabaseDisconnect) then
1820	>	FBeforeDatabaseDisconnect(Sender);
1821	>	end;
1822	>
1823	>	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1824	>	begin
1825	>	if Assigned(FAfterDatabaseDisconnect) then
1826	>	FAfterDatabaseDisconnect(Sender);
1827	>	end;
1828	>
1829	>	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1830	>	begin
1831	>	if Assigned(FDatabaseFree) then
1832	>	FDatabaseFree(Sender);
1833	>	end;
1834	>
1835	>	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject;
1836	>	Action: TTransactionAction);
1837	>	begin
1838	>	FCloseAction := Action;
1839	>	FInTransactionEnd := true;
1840	>	try
1841	>	if Active then
1842	>	Active := False;
1843	>	finally
1844	>	FInTransactionEnd := false;
1845	>	end;
1846	>	if FQSelect <> nil then
1847	>	FQSelect.FreeHandle;
1848	>	if FQDelete <> nil then
1849	>	FQDelete.FreeHandle;
1850	>	if FQInsert <> nil then
1851	>	FQInsert.FreeHandle;
1852	>	if FQModify <> nil then
1853	>	FQModify.FreeHandle;
1854	>	if FQRefresh <> nil then
1855	>	FQRefresh.FreeHandle;
1856	>	InternalUnPrepare;
1857	>	if Assigned(FBeforeTransactionEnd) then
1858	>	FBeforeTransactionEnd(Sender);
1859	>	end;
1860	>
1861	>	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1862	>	begin
1863	>	if Assigned(FAfterTransactionEnd) then
1864	>	FAfterTransactionEnd(Sender);
1865	>	end;
1866	>
1867	>	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1868	>	begin
1869	>	if Assigned(FTransactionFree) then
1870	>	FTransactionFree(Sender);
1871	>	end;
1872	>
1873	>	procedure TIBCustomDataSet.InitModelBuffer(Qry: TIBSQL; Buffer: PChar);
1874	>	var i, j: Integer;
1875	>	FieldsLoaded: integer;
1876	>	p: PRecordData;
1877	>	colMetadata: IColumnMetaData;
1878	>	begin
1879	>	p := PRecordData(Buffer);
1880	>	{ Get record information }
1881	>	p^.rdBookmarkFlag := bfCurrent;
1882	>	p^.rdFieldCount := Qry.FieldCount;
1883	>	p^.rdRecordNumber := -1;
1884	>	p^.rdUpdateStatus := usUnmodified;
1885	>	p^.rdCachedUpdateStatus := cusUnmodified;
1886	>	p^.rdSavedOffset := $FFFFFFFF;
1887	>
1888	>	{ Load up the fields }
1889	>	FieldsLoaded := FQSelect.MetaData.Count;
1890	>	j := 1;
1891	>	for i := 0 to Qry.MetaData.Count - 1 do
1892	>	begin
1893	>	if (Qry = FQSelect) then
1894	>	j := i + 1
1895	>	else
1896	>	begin
1897	>	if FieldsLoaded = 0 then
1898	>	break;
1899	>	j := FQSelect.FieldIndex[Qry[i].Name] + 1;
1900	>	if j < 1 then
1901	>	continue
1902	>	else
1903	>	Dec(FieldsLoaded);
1904	>	end;
1905	>	if j > 0 then
1906	>	begin
1907	>	colMetadata := Qry.MetaData[i];
1908	>	with p^.rdFields[j], FFieldColumns^[j] do
1909	>	begin
1910	>	fdDataType := colMetadata.GetSQLType;
1911	>	if fdDataType = SQL_BLOB then
1912	>	fdDataScale := 0
1913	>	else
1914	>	fdDataScale := colMetadata.getScale;
1915	>	fdNullable := colMetadata.getIsNullable;
1916	>	fdIsNull := true;
1917	>	fdDataSize := colMetadata.GetSize;
1918	>	fdDataLength := 0;
1919	>	fdCodePage := CP_NONE;
1920	>
1921	>	case fdDataType of
1922	>	SQL_TIMESTAMP,
1923	>	SQL_TYPE_DATE,
1924	>	SQL_TYPE_TIME:
1925	>	fdDataSize := SizeOf(TDateTime);
1926	>	SQL_SHORT, SQL_LONG:
1927	>	begin
1928	>	if (fdDataScale = 0) then
1929	>	fdDataSize := SizeOf(Integer)
1930	>	else
1931	>	if (fdDataScale >= (-4)) then
1932	>	fdDataSize := SizeOf(Currency)
1933	>	else
1934	>	fdDataSize := SizeOf(Double);
1935	>	end;
1936	>	SQL_INT64:
1937	>	begin
1938	>	if (fdDataScale = 0) then
1939	>	fdDataSize := SizeOf(Int64)
1940	>	else
1941	>	if (fdDataScale >= (-4)) then
1942	>	fdDataSize := SizeOf(Currency)
1943	>	else
1944	>	fdDataSize := SizeOf(Double);
1945	>	end;
1946	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
1947	>	fdDataSize := SizeOf(Double);
1948	>	SQL_BOOLEAN:
1949	>	fdDataSize := SizeOf(wordBool);
1950	>	SQL_VARYING,
1951	>	SQL_TEXT,
1952	>	SQL_BLOB:
1953	>	fdCodePage := Qry.Metadata[i].getCodePage;
1954	>	end;
1955	>	fdDataOfs := FRecordSize;
1956	>	Inc(FRecordSize, fdDataSize);
1957	>	end;
1958	>	end;
1959	>	end;
1960	>	end;
1961	>
1962	>	{ Read the record from FQSelect.Current into the record buffer
1963	>	Then write the buffer to in memory cache }
1964	>	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
1965	>	RecordNumber: Integer; Buffer: PChar);
1966	>	var
1967	>	pbd: PBlobDataArray;
1968	>	pda: PArrayDataArray;
1969	>	i, j: Integer;
1970	>	LocalData: PByte;
1971	>	LocalDate, LocalDouble: Double;
1972	>	LocalInt: Integer;
1973	>	LocalBool: wordBool;
1974	>	LocalInt64: Int64;
1975	>	LocalCurrency: Currency;
1976	>	FieldsLoaded: Integer;
1977	>	p: PRecordData;
1978	>	begin
1979	>	if RecordNumber = -1 then
1980	>	begin
1981	>	InitModelBuffer(Qry,Buffer);
1982	>	Exit;
1983	>	end;
1984	>	p := PRecordData(Buffer);
1985	>	{ Make sure blob cache is empty }
1986	>	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
1987	>	pda := PArrayDataArray(Buffer + FArrayCacheOffset);
1988	>	for i := 0 to BlobFieldCount - 1 do
1989	>	pbd^[i] := nil;
1990	>	for i := 0 to ArrayFieldCount - 1 do
1991	>	pda^[i] := nil;
1992	>
1993	>	{ Get record information }
1994	>	p^.rdBookmarkFlag := bfCurrent;
1995	>	p^.rdFieldCount := Qry.FieldCount;
1996	>	p^.rdRecordNumber := RecordNumber;
1997	>	p^.rdUpdateStatus := usUnmodified;
1998	>	p^.rdCachedUpdateStatus := cusUnmodified;
1999	>	p^.rdSavedOffset := $FFFFFFFF;
2000	>
2001	>	{ Load up the fields }
2002	>	FieldsLoaded := FQSelect.MetaData.Count;
2003	>	j := 1;
2004	>	for i := 0 to Qry.FieldCount - 1 do
2005	>	begin
2006	>	if (Qry = FQSelect) then
2007	>	j := i + 1
2008	>	else
2009	>	begin
2010	>	if FieldsLoaded = 0 then
2011	>	break;
2012	>	j := FQSelect.FieldIndex[Qry[i].Name] + 1;
2013	>	if j < 1 then
2014	>	continue
2015	>	else
2016	>	Dec(FieldsLoaded);
2017	>	end;
2018	>	with FQSelect.MetaData[j - 1] do
2019	>	if GetAliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
2020	>	begin
2021	>	if (GetSize <= 8) then
2022	>	p^.rdDBKey := PIBDBKEY(Qry[i].AsPointer)^;
2023	>	continue;
2024	>	end;
2025	>	if j > 0 then
2026	>	begin
2027	>	LocalData := nil;
2028	>	with p^.rdFields[j], FFieldColumns^[j] do
2029	>	begin
2030	>	Qry.Current.GetData(i,fdIsNull,fdDataLength,LocalData);
2031	>	if not fdIsNull then
2032	>	begin
2033	>	case fdDataType of  {Get Formatted data for column types that need formatting}
2034	>	SQL_TIMESTAMP:
2035	>	begin
2036	>	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry[i].AsDateTime));
2037	>	LocalData := PByte(@LocalDate);
2038	>	end;
2039	>	SQL_TYPE_DATE:
2040	>	begin
2041	>	LocalInt := DateTimeToTimeStamp(Qry[i].AsDateTime).Date;
2042	>	LocalData := PByte(@LocalInt);
2043	>	end;
2044	>	SQL_TYPE_TIME:
2045	>	begin
2046	>	LocalInt := DateTimeToTimeStamp(Qry[i].AsDateTime).Time;
2047	>	LocalData := PByte(@LocalInt);
2048	>	end;
2049	>	SQL_SHORT, SQL_LONG:
2050	>	begin
2051	>	if (fdDataScale = 0) then
2052	>	begin
2053	>	LocalInt := Qry[i].AsLong;
2054	>	LocalData := PByte(@LocalInt);
2055	>	end
2056	>	else
2057	>	if (fdDataScale >= (-4)) then
2058	>	begin
2059	>	LocalCurrency := Qry[i].AsCurrency;
2060	>	LocalData := PByte(@LocalCurrency);
2061	>	end
2062	>	else
2063	>	begin
2064	>	LocalDouble := Qry[i].AsDouble;
2065	>	LocalData := PByte(@LocalDouble);
2066	>	end;
2067	>	end;
2068	>	SQL_INT64:
2069	>	begin
2070	>	if (fdDataScale = 0) then
2071	>	begin
2072	>	LocalInt64 := Qry[i].AsInt64;
2073	>	LocalData := PByte(@LocalInt64);
2074	>	end
2075	>	else
2076	>	if (fdDataScale >= (-4)) then
2077	>	begin
2078	>	LocalCurrency := Qry[i].AsCurrency;
2079	>	LocalData := PByte(@LocalCurrency);
2080	>	end
2081	>	else
2082	>	begin
2083	>	LocalDouble := Qry[i].AsDouble;
2084	>	LocalData := PByte(@LocalDouble);
2085	>	end
2086	>	end;
2087	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
2088	>	begin
2089	>	LocalDouble := Qry[i].AsDouble;
2090	>	LocalData := PByte(@LocalDouble);
2091	>	end;
2092	>	SQL_BOOLEAN:
2093	>	begin
2094	>	LocalBool := Qry[i].AsBoolean;
2095	>	LocalData := PByte(@LocalBool);
2096	>	end;
2097	>	end;
2098	>
2099	>	if fdDataType = SQL_VARYING then
2100	>	Move(LocalData^, Buffer[fdDataOfs], fdDataLength)
2101	>	else
2102	>	Move(LocalData^, Buffer[fdDataOfs], fdDataSize)
2103	>	end
2104	>	else {Null column}
2105	>	if fdDataType = SQL_VARYING then
2106	>	FillChar(Buffer[fdDataOfs],fdDataLength,0)
2107	>	else
2108	>	FillChar(Buffer[fdDataOfs],fdDataSize,0);
2109	>	end;
2110	>	end;
2111	>	end;
2112	>	WriteRecordCache(RecordNumber, Buffer);
2113	>	end;
2114	>
2115	>	function TIBCustomDataSet.GetActiveBuf: PChar;
2116	>	begin
2117	>	case State of
2118	>	dsBrowse:
2119	>	if IsEmpty then
2120	>	result := nil
2121	>	else
2122	>	result := ActiveBuffer;
2123	>	dsEdit, dsInsert:
2124	>	result := ActiveBuffer;
2125	>	dsCalcFields:
2126	>	result := CalcBuffer;
2127	>	dsFilter:
2128	>	result := FFilterBuffer;
2129	>	dsNewValue:
2130	>	result := ActiveBuffer;
2131	>	dsOldValue:
2132	>	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
2133	>	PRecordData(FOldBuffer)^.rdRecordNumber) then
2134	>	result := FOldBuffer
2135	>	else
2136	>	result := ActiveBuffer;
2137	>	else if not FOpen then
2138	>	result := nil
2139	>	else
2140	>	result := ActiveBuffer;
2141	>	end;
2142	>	end;
2143	>
2144	>	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
2145	>	begin
2146	>	if Active then
2147	>	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
2148	>	else
2149	>	result := cusUnmodified;
2150	>	end;
2151	>
2152	>	function TIBCustomDataSet.GetDatabase: TIBDatabase;
2153	>	begin
2154	>	result := FBase.Database;
2155	>	end;
2156	>
2157	>	function TIBCustomDataSet.GetDeleteSQL: TStrings;
2158	>	begin
2159	>	result := FQDelete.SQL;
2160	>	end;
2161	>
2162	>	function TIBCustomDataSet.GetInsertSQL: TStrings;
2163	>	begin
2164	>	result := FQInsert.SQL;
2165	>	end;
2166	>
2167	>	function TIBCustomDataSet.GetSQLParams: ISQLParams;
2168	>	begin
2169	>	if not FInternalPrepared then
2170	>	InternalPrepare;
2171	>	result := FQSelect.Params;
2172	>	end;
2173	>
2174	>	function TIBCustomDataSet.GetRefreshSQL: TStrings;
2175	>	begin
2176	>	result := FQRefresh.SQL;
2177	>	end;
2178	>
2179	>	function TIBCustomDataSet.GetSelectSQL: TStrings;
2180	>	begin
2181	>	result := FQSelect.SQL;
2182	>	end;
2183	>
2184	>	function TIBCustomDataSet.GetStatementType: TIBSQLStatementTypes;
2185	>	begin
2186	>	result := FQSelect.SQLStatementType;
2187	>	end;
2188	>
2189	>	function TIBCustomDataSet.GetModifySQL: TStrings;
2190	>	begin
2191	>	result := FQModify.SQL;
2192	>	end;
2193	>
2194	>	function TIBCustomDataSet.GetTransaction: TIBTransaction;
2195	>	begin
2196	>	result := FBase.Transaction;
2197	>	end;
2198	>
2199	>	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
2200	>	begin
2201	>	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
2202	>	FUpdateObject.Apply(ukDelete,Buff)
2203	>	else
2204	>	begin
2205	>	SetInternalSQLParams(FQDelete, Buff);
2206	>	FQDelete.ExecQuery;
2207	>	end;
2208	>	with PRecordData(Buff)^ do
2209	>	begin
2210	>	rdUpdateStatus := usDeleted;
2211	>	rdCachedUpdateStatus := cusUnmodified;
2212	>	end;
2213	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2214	>	end;
2215	>
2216	>	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
2217	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
2218	>	var
2219	>	keyFieldList: TList;
2220	>	CurBookmark: TBookmark;
2221	>	fieldValue: Variant;
2222	>	lookupValues: array of variant;
2223	>	i, fieldCount: Integer;
2224	>	fieldValueAsString: string;
2225	>	lookupValueAsString: string;
2226	>	begin
2227	>	keyFieldList := TList.Create;
2228	>	try
2229	>	GetFieldList(keyFieldList, KeyFields);
2230	>	fieldCount := keyFieldList.Count;
2231	>	CurBookmark := Bookmark;
2232	>	result := false;
2233	>	SetLength(lookupValues, fieldCount);
2234	>	if not EOF then
2235	>	begin
2236	>	for i := 0 to fieldCount - 1 do  {expand key values into lookupValues array}
2237	>	begin
2238	>	if VarIsArray(KeyValues) then
2239	>	lookupValues[i] := KeyValues[i]
2240	>	else
2241	>	if i > 0 then
2242	>	lookupValues[i] := NULL
2243	>	else
2244	>	lookupValues[0] := KeyValues;
2245	>
2246	>	{convert to upper case is case insensitive search}
2247	>	if (TField(keyFieldList[i]).DataType = ftString) and
2248	>	not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
2249	>	lookupValues[i] := UpperCase(lookupValues[i]);
2250	>	end;
2251	>	end;
2252	>	while not result and not EOF do   {search for a matching record}
2253	>	begin
2254	>	i := 0;
2255	>	result := true;
2256	>	while result and (i < fieldCount) do
2257	>	{see if all of the key fields matches}
2258	>	begin
2259	>	fieldValue := TField(keyFieldList[i]).Value;
2260	>	result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
2261	>	if result and not VarIsNull(fieldValue) then
2262	>	begin
2263	>	try
2264	>	if TField(keyFieldList[i]).DataType = ftString then
2265	>	begin
2266	>	{strings need special handling because of the locate options that
2267	>	apply to them}
2268	>	fieldValueAsString := TField(keyFieldList[i]).AsString;
2269	>	lookupValueAsString := lookupValues[i];
2270	>	if (loCaseInsensitive in Options) then
2271	>	fieldValueAsString := UpperCase(fieldValueAsString);
2272	>
2273	>	if (loPartialKey in Options) then
2274	>	result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
2275	>	else
2276	>	result := result and (fieldValueAsString = lookupValueAsString);
2277	>	end
2278	>	else
2279	>	result := result and (lookupValues[i] =
2280	>	VarAsType(fieldValue, VarType(lookupValues[i])));
2281	>	except on EVariantError do
2282	>	result := False;
2283	>	end;
2284	>	end;
2285	>	Inc(i);
2286	>	end;
2287	>	if not result then
2288	>	Next;
2289	>	end;
2290	>	if not result then
2291	>	Bookmark := CurBookmark
2292	>	else
2293	>	CursorPosChanged;
2294	>	finally
2295	>	keyFieldList.Free;
2296	>	SetLength(lookupValues,0)
2297	>	end;
2298	>	end;
2299	>
2300	>	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
2301	>	var
2302	>	i, j, k, arr: Integer;
2303	>	pbd: PBlobDataArray;
2304	>	pda: PArrayDataArray;
2305	>	begin
2306	>	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
2307	>	pda := PArrayDataArray(PChar(Buff) + FArrayCacheOffset);
2308	>	j := 0; arr := 0;
2309	>	for i := 0 to FieldCount - 1 do
2310	>	if Fields[i].IsBlob then
2311	>	begin
2312	>	k := FMappedFieldPosition[Fields[i].FieldNo -1];
2313	>	if pbd^[j] <> nil then
2314	>	begin
2315	>	pbd^[j].Finalize;
2316	>	PISC_QUAD(
2317	>	PChar(Buff) + FFieldColumns^[k].fdDataOfs)^ :=
2318	>	pbd^[j].BlobID;
2319	>	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
2320	>	end
2321	>	else
2322	>	begin
2323	>	PRecordData(Buff)^.rdFields[k].fdIsNull := true;
2324	>	with PISC_QUAD(PChar(Buff) + FFieldColumns^[k].fdDataOfs)^ do
2325	>	begin
2326	>	gds_quad_high := 0;
2327	>	gds_quad_low := 0;
2328	>	end;
2329	>	end;
2330	>	Inc(j);
2331	>	end
2332	>	else
2333	>	if Fields[i] is TIBArrayField then
2334	>	begin
2335	>	if pda^[arr] <> nil then
2336	>	begin
2337	>	k := FMappedFieldPosition[Fields[i].FieldNo -1];
2338	>	PISC_QUAD(
2339	>	PChar(Buff) + FFieldColumns^[k].fdDataOfs)^ :=  pda^[arr].ArrayIntf.GetArrayID;
2340	>	PRecordData(Buff)^.rdFields[k].fdIsNull := pda^[arr].ArrayIntf.IsEmpty;
2341	>	end;
2342	>	Inc(arr);
2343	>	end;
2344	>	if Assigned(FUpdateObject) then
2345	>	begin
2346	>	if (Qry = FQDelete) then
2347	>	FUpdateObject.Apply(ukDelete,Buff)
2348	>	else if (Qry = FQInsert) then
2349	>	FUpdateObject.Apply(ukInsert,Buff)
2350	>	else
2351	>	FUpdateObject.Apply(ukModify,Buff);
2352	>	end
2353	>	else begin
2354	>	SetInternalSQLParams(Qry, Buff);
2355	>	Qry.ExecQuery;
2356	>	end;
2357	>	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
2358	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2359	>	SetModified(False);
2360	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2361	>	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
2362	>	InternalRefreshRow;
2363	>	end;
2364	>
2365	>	procedure TIBCustomDataSet.InternalRefreshRow;
2366	>	var
2367	>	Buff: PChar;
2368	>	ofs: DWORD;
2369	>	Qry: TIBSQL;
2370	>	begin
2371	>	FBase.SetCursor;
2372	>	try
2373	>	Buff := GetActiveBuf;
2374	>	if CanRefresh then
2375	>	begin
2376	>	if Buff <> nil then
2377	>	begin
2378	>	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
2379	>	begin
2380	>	Qry := TIBSQL.Create(self);
2381	>	Qry.Database := Database;
2382	>	Qry.Transaction := Transaction;
2383	>	Qry.GoToFirstRecordOnExecute := False;
2384	>	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
2385	>	end
2386	>	else
2387	>	Qry := FQRefresh;
2388	>	SetInternalSQLParams(Qry, Buff);
2389	>	Qry.ExecQuery;
2390	>	try
2391	>	if (Qry.SQLStatementType = SQLExecProcedure) or Qry.Next then
2392	>	begin
2393	>	ofs := PRecordData(Buff)^.rdSavedOffset;
2394	>	FetchCurrentRecordToBuffer(Qry,
2395	>	PRecordData(Buff)^.rdRecordNumber,
2396	>	Buff);
2397	>	if FCachedUpdates and (ofs <> $FFFFFFFF) then
2398	>	begin
2399	>	PRecordData(Buff)^.rdSavedOffset := ofs;
2400	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2401	>	SaveOldBuffer(Buff);
2402	>	end;
2403	>	end;
2404	>	finally
2405	>	Qry.Close;
2406	>	end;
2407	>	if Qry <> FQRefresh then
2408	>	Qry.Free;
2409	>	end
2410	>	end
2411	>	else
2412	>	IBError(ibxeCannotRefresh, [nil]);
2413	>	finally
2414	>	FBase.RestoreCursor;
2415	>	end;
2416	>	end;
2417	>
2418	>	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
2419	>	var
2420	>	NewBuffer, OldBuffer: PRecordData;
2421	>
2422	>	begin
2423	>	NewBuffer := nil;
2424	>	OldBuffer := nil;
2425	>	NewBuffer := PRecordData(AllocRecordBuffer);
2426	>	OldBuffer := PRecordData(AllocRecordBuffer);
2427	>	try
2428	>	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
2429	>	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
2430	>	case NewBuffer^.rdCachedUpdateStatus of
2431	>	cusInserted:
2432	>	begin
2433	>	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
2434	>	Inc(FDeletedRecords);
2435	>	end;
2436	>	cusModified,
2437	>	cusDeleted:
2438	>	begin
2439	>	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
2440	>	Dec(FDeletedRecords);
2441	>	CopyRecordBuffer(OldBuffer, NewBuffer);
2442	>	end;
2443	>	end;
2444	>
2445	>	if State in dsEditModes then
2446	>	Cancel;
2447	>
2448	>	WriteRecordCache(RecordNumber, PChar(NewBuffer));
2449	>
2450	>	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
2451	>	ReSync([]);
2452	>	finally
2453	>	FreeRecordBuffer(PChar(NewBuffer));
2454	>	FreeRecordBuffer(PChar(OldBuffer));
2455	>	end;
2456	>	end;
2457	>
2458	>	{ A visible record is one that is not truly deleted,
2459	>	and it is also listed in the FUpdateRecordTypes set }
2460	>
2461	>	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
2462	>	begin
2463	>	result := True;
2464	>	if not (State = dsOldValue) then
2465	>	result :=
2466	>	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
2467	>	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
2468	>	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
2469	>	end;
2470	>
2471	>
2472	>	function TIBCustomDataSet.LocateNext(const KeyFields: string;
2473	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
2474	>	begin
2475	>	DisableControls;
2476	>	try
2477	>	result := InternalLocate(KeyFields, KeyValues, Options);
2478	>	finally
2479	>	EnableControls;
2480	>	end;
2481	>	end;
2482	>
2483	>	procedure TIBCustomDataSet.InternalPrepare;
2484	>	begin
2485	>	if FInternalPrepared then
2486	>	Exit;
2487	>	FBase.SetCursor;
2488	>	try
2489	>	ActivateConnection;
2490	>	ActivateTransaction;
2491	>	FBase.CheckDatabase;
2492	>	FBase.CheckTransaction;
2493	>	if HasParser and (FParser.SQLText <> FQSelect.SQL.Text) then
2494	>	begin
2495	>	FQSelect.OnSQLChanged := nil; {Do not react to change}
2496	>	try
2497	>	FQSelect.SQL.Text := FParser.SQLText;
2498	>	finally
2499	>	FQSelect.OnSQLChanged := SQLChanged;
2500	>	end;
2501	>	end;
2502	>	//   writeln( FQSelect.SQL.Text);
2503	>	if FQSelect.SQL.Text <> '' then
2504	>	begin
2505	>	if not FQSelect.Prepared then
2506	>	begin
2507	>	FQSelect.GenerateParamNames := FGenerateParamNames;
2508	>	FQSelect.ParamCheck := ParamCheck;
2509	>	FQSelect.Prepare;
2510	>	end;
2511	>	FQDelete.GenerateParamNames := FGenerateParamNames;
2512	>	if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
2513	>	FQDelete.Prepare;
2514	>	FQInsert.GenerateParamNames := FGenerateParamNames;
2515	>	if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
2516	>	FQInsert.Prepare;
2517	>	FQRefresh.GenerateParamNames := FGenerateParamNames;
2518	>	if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
2519	>	FQRefresh.Prepare;
2520	>	FQModify.GenerateParamNames := FGenerateParamNames;
2521	>	if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
2522	>	FQModify.Prepare;
2523	>	FInternalPrepared := True;
2524	>	InternalInitFieldDefs;
2525	>	end else
2526	>	IBError(ibxeEmptyQuery, [nil]);
2527	>	finally
2528	>	FBase.RestoreCursor;
2529	>	end;
2530	>	end;
2531	>
2532	>	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
2533	>	begin
2534	>	SetModified(Value);
2535	>	end;
2536	>
2537	>	procedure TIBCustomDataSet.RevertRecord;
2538	>	var
2539	>	Buff: PRecordData;
2540	>	begin
2541	>	if FCachedUpdates and FUpdatesPending then
2542	>	begin
2543	>	Buff := PRecordData(GetActiveBuf);
2544	>	InternalRevertRecord(Buff^.rdRecordNumber);
2545	>	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
2546	>	DataEvent(deRecordChange, 0);
2547	>	end;
2548	>	end;
2549	>
2550	>	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
2551	>	var
2552	>	OldBuffer: Pointer;
2553	>	procedure CopyOldBuffer;
2554	>	begin
2555	>	CopyRecordBuffer(Buffer, OldBuffer);
2556	>	if BlobFieldCount > 0 then
2557	>	FillChar(PChar(OldBuffer)[FBlobCacheOffset],
2558	>	BlobFieldCount * SizeOf(TIBBlobStream) + ArrayFieldCount * SizeOf(IArray),
2559	>	0);
2560	>	end;
2561	>
2562	>	begin
2563	>	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
2564	>	begin
2565	>	OldBuffer := AllocRecordBuffer;
2566	>	try
2567	>	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
2568	>	begin
2569	>	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
2570	>	FILE_END);
2571	>	CopyOldBuffer;
2572	>	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
2573	>	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
2574	>	FILE_BEGIN, Buffer);
2575	>	end
2576	>	else begin
2577	>	CopyOldBuffer;
2578	>	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2579	>	OldBuffer);
2580	>	end;
2581	>	finally
2582	>	FreeRecordBuffer(PChar(OldBuffer));
2583	>	end;
2584	>	end;
2585	>	end;
2586	>
2587	>	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
2588	>	begin
2589	>	if (Value <= 0) then
2590	>	FBufferChunks := BufferCacheSize
2591	>	else
2592	>	FBufferChunks := Value;
2593	>	end;
2594	>
2595	>	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
2596	>	begin
2597	>	if (FBase.Database <> Value) then
2598	>	begin
2599	>	CheckDatasetClosed;
2600	>	FBase.Database := Value;
2601	>	FQDelete.Database := Value;
2602	>	FQInsert.Database := Value;
2603	>	FQRefresh.Database := Value;
2604	>	FQSelect.Database := Value;
2605	>	FQModify.Database := Value;
2606	>	end;
2607	>	end;
2608	>
2609	>	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
2610	>	begin
2611	>	if FQDelete.SQL.Text <> Value.Text then
2612	>	begin
2613	>	Disconnect;
2614	>	FQDelete.SQL.Assign(Value);
2615	>	end;
2616	>	end;
2617	>
2618	>	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
2619	>	begin
2620	>	if FQInsert.SQL.Text <> Value.Text then
2621	>	begin
2622	>	Disconnect;
2623	>	FQInsert.SQL.Assign(Value);
2624	>	end;
2625	>	end;
2626	>
2627	>	procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
2628	>	var
2629	>	i, j: Integer;
2630	>	cr, data: PChar;
2631	>	fn: string;
2632	>	st: RawByteString;
2633	>	OldBuffer: Pointer;
2634	>	ts: TTimeStamp;
2635	>	Param: ISQLParam;
2636	>	begin
2637	>	if (Buffer = nil) then
2638	>	IBError(ibxeBufferNotSet, [nil]);
2639	>	if (not FInternalPrepared) then
2640	>	InternalPrepare;
2641	>	OldBuffer := nil;
2642	>	try
2643	>	for i := 0 to Qry.Params.GetCount - 1 do
2644	>	begin
2645	>	Param := Qry.Params[i];
2646	>	fn := Param.Name;
2647	>	if (Pos('OLD_', fn) = 1) then {mbcs ok}
2648	>	begin
2649	>	fn := Copy(fn, 5, Length(fn));
2650	>	if not Assigned(OldBuffer) then
2651	>	begin
2652	>	OldBuffer := AllocRecordBuffer;
2653	>	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
2654	>	end;
2655	>	cr := OldBuffer;
2656	>	end
2657	>	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
2658	>	begin
2659	>	fn := Copy(fn, 5, Length(fn));
2660	>	cr := Buffer;
2661	>	end
2662	>	else
2663	>	cr := Buffer;
2664	>	j := FQSelect.FieldIndex[fn] + 1;
2665	>	if (j > 0) then
2666	>	with PRecordData(cr)^,rdFields[j], FFieldColumns^[j] do
2667	>	begin
2668	>	if Param.name = 'IBX_INTERNAL_DBKEY' then {do not localize}
2669	>	begin
2670	>	PIBDBKey(Param.AsPointer)^ := rdDBKey;
2671	>	continue;
2672	>	end;
2673	>	if fdIsNull then
2674	>	Param.IsNull := True
2675	>	else begin
2676	>	Param.IsNull := False;
2677	>	data := cr + fdDataOfs;
2678	>	case fdDataType of
2679	>	SQL_TEXT, SQL_VARYING:
2680	>	begin
2681	>	SetString(st, data, fdDataLength);
2682	>	SetCodePage(st,fdCodePage,false);
2683	>	Param.AsString := st;
2684	>	end;
2685	>	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
2686	>	Param.AsDouble := PDouble(data)^;
2687	>	SQL_SHORT, SQL_LONG:
2688	>	begin
2689	>	if fdDataScale = 0 then
2690	>	Param.AsLong := PLong(data)^
2691	>	else
2692	>	if fdDataScale >= (-4) then
2693	>	Param.AsCurrency := PCurrency(data)^
2694	>	else
2695	>	Param.AsDouble := PDouble(data)^;
2696	>	end;
2697	>	SQL_INT64:
2698	>	begin
2699	>	if fdDataScale = 0 then
2700	>	Param.AsInt64 := PInt64(data)^
2701	>	else
2702	>	if fdDataScale >= (-4) then
2703	>	Param.AsCurrency := PCurrency(data)^
2704	>	else
2705	>	Param.AsDouble := PDouble(data)^;
2706	>	end;
2707	>	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
2708	>	Param.AsQuad := PISC_QUAD(data)^;
2709	>	SQL_TYPE_DATE:
2710	>	begin
2711	>	ts.Date := PInt(data)^;
2712	>	ts.Time := 0;
2713	>	Param.AsDate := TimeStampToDateTime(ts);
2714	>	end;
2715	>	SQL_TYPE_TIME:
2716	>	begin
2717	>	ts.Date := 0;
2718	>	ts.Time := PInt(data)^;
2719	>	Param.AsTime := TimeStampToDateTime(ts);
2720	>	end;
2721	>	SQL_TIMESTAMP:
2722	>	Param.AsDateTime :=
2723	>	TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^)));
2724	>	SQL_BOOLEAN:
2725	>	Param.AsBoolean := PWordBool(data)^;
2726	>	end;
2727	>	end;
2728	>	end;
2729	>	end;
2730	>	finally
2731	>	if (OldBuffer <> nil) then
2732	>	FreeRecordBuffer(PChar(OldBuffer));
2733	>	end;
2734	>	end;
2735	>
2736	>	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2737	>	begin
2738	>	if FQRefresh.SQL.Text <> Value.Text then
2739	>	begin
2740	>	Disconnect;
2741	>	FQRefresh.SQL.Assign(Value);
2742	>	end;
2743	>	end;
2744	>
2745	>	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2746	>	begin
2747	>	if FQSelect.SQL.Text <> Value.Text then
2748	>	begin
2749	>	Disconnect;
2750	>	FQSelect.SQL.Assign(Value);
2751	>	end;
2752	>	end;
2753	>
2754	>	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2755	>	begin
2756	>	if FQModify.SQL.Text <> Value.Text then
2757	>	begin
2758	>	Disconnect;
2759	>	FQModify.SQL.Assign(Value);
2760	>	end;
2761	>	end;
2762	>
2763	>	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2764	>	begin
2765	>	if (FBase.Transaction <> Value) then
2766	>	begin
2767	>	CheckDatasetClosed;
2768	>	FBase.Transaction := Value;
2769	>	FQDelete.Transaction := Value;
2770	>	FQInsert.Transaction := Value;
2771	>	FQRefresh.Transaction := Value;
2772	>	FQSelect.Transaction := Value;
2773	>	FQModify.Transaction := Value;
2774	>	end;
2775	>	end;
2776	>
2777	>	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2778	>	begin
2779	>	CheckDatasetClosed;
2780	>	FUniDirectional := Value;
2781	>	end;
2782	>
2783	>	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2784	>	begin
2785	>	FUpdateRecordTypes := Value;
2786	>	if Active then
2787	>	First;
2788	>	end;
2789	>
2790	>	procedure TIBCustomDataSet.RefreshParams;
2791	>	var
2792	>	DataSet: TDataSet;
2793	>	begin
2794	>	DisableControls;
2795	>	try
2796	>	if FDataLink.DataSource <> nil then
2797	>	begin
2798	>	DataSet := FDataLink.DataSource.DataSet;
2799	>	if DataSet <> nil then
2800	>	if DataSet.Active and (DataSet.State <> dsSetKey) then
2801	>	begin
2802	>	Close;
2803	>	Open;
2804	>	end;
2805	>	end;
2806	>	finally
2807	>	EnableControls;
2808	>	end;
2809	>	end;
2810	>
2811	>	procedure TIBCustomDataSet.RegisterIBLink(Sender: TIBControlLink);
2812	>	begin
2813	>	if FIBLinks.IndexOf(Sender) = -1 then
2814	>	FIBLinks.Add(Sender);
2815	>	end;
2816	>
2817	>
2818	>	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2819	>	begin
2820	>	Active := false;
2821	>	{  if FOpen then
2822	>	InternalClose;}
2823	>	if FInternalPrepared then
2824	>	InternalUnPrepare;
2825	>	FieldDefs.Clear;
2826	>	FieldDefs.Updated := false;
2827	>	end;
2828	>
2829	>	procedure TIBCustomDataSet.SQLChanged(Sender: TObject);
2830	>	begin
2831	>	FBaseSQLSelect.assign(FQSelect.SQL);
2832	>	end;
2833	>
2834	>	{ I can "undelete" uninserted records (make them "inserted" again).
2835	>	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2836	>	procedure TIBCustomDataSet.Undelete;
2837	>	var
2838	>	Buff: PRecordData;
2839	>	begin
2840	>	CheckActive;
2841	>	Buff := PRecordData(GetActiveBuf);
2842	>	with Buff^ do
2843	>	begin
2844	>	if rdCachedUpdateStatus = cusUninserted then
2845	>	begin
2846	>	rdCachedUpdateStatus := cusInserted;
2847	>	Dec(FDeletedRecords);
2848	>	end
2849	>	else if (rdUpdateStatus = usDeleted) and
2850	>	(rdCachedUpdateStatus = cusDeleted) then
2851	>	begin
2852	>	rdCachedUpdateStatus := cusUnmodified;
2853	>	rdUpdateStatus := usUnmodified;
2854	>	Dec(FDeletedRecords);
2855	>	end;
2856	>	WriteRecordCache(rdRecordNumber, PChar(Buff));
2857	>	end;
2858	>	end;
2859	>
2860	>	procedure TIBCustomDataSet.UnRegisterIBLink(Sender: TIBControlLink);
2861	>	begin
2862	>	FIBLinks.Remove(Sender);
2863	>	end;
2864	>
2865	>	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2866	>	begin
2867	>	if Active then
2868	>	if GetActiveBuf <> nil then
2869	>	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2870	>	else
2871	>	result := usUnmodified
2872	>	else
2873	>	result := usUnmodified;
2874	>	end;
2875	>
2876	>	function TIBCustomDataSet.IsSequenced: Boolean;
2877	>	begin
2878	>	Result := Assigned( FQSelect ) and FQSelect.EOF;
2879	>	end;
2880	>
2881	>	function TIBCustomDataSet.ParamByName(ParamName: String): ISQLParam;
2882	>	begin
2883	>	ActivateConnection;
2884	>	ActivateTransaction;
2885	>	if not FInternalPrepared then
2886	>	InternalPrepare;
2887	>	Result := Params.ByName(ParamName);
2888	>	end;
2889	>
2890	>	{Beware: the parameter FCache is used as an identifier to determine which
2891	>	cache is being operated on and is not referenced in the computation.
2892	>	The result is an adjusted offset into the identified cache, either the
2893	>	Buffer Cache or the old Buffer Cache.}
2894	>
2895	>	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
2896	>	Origin: Integer): DWORD;
2897	>	var
2898	>	OldCacheSize: Integer;
2899	>	begin
2900	>	if (FCache = FBufferCache) then
2901	>	begin
2902	>	case Origin of
2903	>	FILE_BEGIN:    FBPos := Offset;
2904	>	FILE_CURRENT:  FBPos := FBPos + Offset;
2905	>	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
2906	>	end;
2907	>	OldCacheSize := FCacheSize;
2908	>	while (FBPos >= DWORD(FCacheSize)) do
2909	>	Inc(FCacheSize, FBufferChunkSize);
2910	>	if FCacheSize > OldCacheSize then
2911	>	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
2912	>	result := FBPos;
2913	>	end
2914	>	else begin
2915	>	case Origin of
2916	>	FILE_BEGIN:    FOBPos := Offset;
2917	>	FILE_CURRENT:  FOBPos := FOBPos + Offset;
2918	>	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
2919	>	end;
2920	>	OldCacheSize := FOldCacheSize;
2921	>	while (FBPos >= DWORD(FOldCacheSize)) do
2922	>	Inc(FOldCacheSize, FBufferChunkSize);
2923	>	if FOldCacheSize > OldCacheSize then
2924	>	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
2925	>	result := FOBPos;
2926	>	end;
2927	>	end;
2928	>
2929	>	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2930	>	Buffer: PChar);
2931	>	var
2932	>	pCache: PChar;
2933	>	AdjustedOffset: DWORD;
2934	>	bOld: Boolean;
2935	>	begin
2936	>	bOld := (FCache = FOldBufferCache);
2937	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2938	>	if not bOld then
2939	>	pCache := FBufferCache + AdjustedOffset
2940	>	else
2941	>	pCache := FOldBufferCache + AdjustedOffset;
2942	>	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
2943	>	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2944	>	end;
2945	>
2946	>	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
2947	>	ReadOldBuffer: Boolean);
2948	>	begin
2949	>	if FUniDirectional then
2950	>	RecordNumber := RecordNumber mod UniCache;
2951	>	if (ReadOldBuffer) then
2952	>	begin
2953	>	ReadRecordCache(RecordNumber, Buffer, False);
2954	>	if FCachedUpdates and
2955	>	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
2956	>	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2957	>	Buffer)
2958	>	else
2959	>	if ReadOldBuffer and
2960	>	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
2961	>	CopyRecordBuffer( FOldBuffer, Buffer )
2962	>	end
2963	>	else
2964	>	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2965	>	end;
2966	>
2967	>	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2968	>	Buffer: PChar);
2969	>	var
2970	>	pCache: PChar;
2971	>	AdjustedOffset: DWORD;
2972	>	bOld: Boolean;
2973	>	dwEnd: DWORD;
2974	>	begin
2975	>	bOld := (FCache = FOldBufferCache);
2976	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2977	>	if not bOld then
2978	>	pCache := FBufferCache + AdjustedOffset
2979	>	else
2980	>	pCache := FOldBufferCache + AdjustedOffset;
2981	>	Move(Buffer^, pCache^, FRecordBufferSize);
2982	>	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2983	>	if not bOld then
2984	>	begin
2985	>	if (dwEnd > FBEnd) then
2986	>	FBEnd := dwEnd;
2987	>	end
2988	>	else begin
2989	>	if (dwEnd > FOBEnd) then
2990	>	FOBEnd := dwEnd;
2991	>	end;
2992	>	end;
2993	>
2994	>	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
2995	>	begin
2996	>	if RecordNumber >= 0 then
2997	>	begin
2998	>	if FUniDirectional then
2999	>	RecordNumber := RecordNumber mod UniCache;
3000	>	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
3001	>	end;
3002	>	end;
3003	>
3004	>	function TIBCustomDataSet.AllocRecordBuffer: PChar;
3005	>	begin
3006	>	result := nil;
3007	>	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
3008	>	Move(FModelBuffer^, result^, FRecordBufferSize);
3009	>	end;
3010	>
3011	>	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
3012	>	var
3013	>	pb: PBlobDataArray;
3014	>	fs: TIBBlobStream;
3015	>	Buff: PChar;
3016	>	bTr, bDB: Boolean;
3017	>	begin
3018	>	if (Field = nil) or (Field.DataSet <> self) then
3019	>	IBError(ibxFieldNotinDataSet,[Field.Name,Name]);
3020	>	Buff := GetActiveBuf;
3021	>	if Buff = nil then
3022	>	begin
3023	>	fs := TIBBlobStream.Create;
3024	>	fs.Mode := bmReadWrite;
3025	>	fs.Database := Database;
3026	>	fs.Transaction := Transaction;
3027	>	fs.SetField(Field);
3028	>	FBlobStreamList.Add(Pointer(fs));
3029	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
3030	>	exit;
3031	>	end;
3032	>	pb := PBlobDataArray(Buff + FBlobCacheOffset);
3033	>	if pb^[Field.Offset] = nil then
3034	>	begin
3035	>	AdjustRecordOnInsert(Buff);
3036	>	pb^[Field.Offset] := TIBBlobStream.Create;
3037	>	fs := pb^[Field.Offset];
3038	>	FBlobStreamList.Add(Pointer(fs));
3039	>	fs.Mode := bmReadWrite;
3040	>	fs.Database := Database;
3041	>	fs.Transaction := Transaction;
3042	>	fs.SetField(Field);
3043	>	fs.BlobID :=
3044	>	PISC_QUAD(@Buff[FFieldColumns^[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
3045	>	if (CachedUpdates) then
3046	>	begin
3047	>	bTr := not Transaction.InTransaction;
3048	>	bDB := not Database.Connected;
3049	>	if bDB then
3050	>	Database.Open;
3051	>	if bTr then
3052	>	Transaction.StartTransaction;
3053	>	fs.Seek(0, soFromBeginning);
3054	>	if bTr then
3055	>	Transaction.Commit;
3056	>	if bDB then
3057	>	Database.Close;
3058	>	end;
3059	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
3060	>	end else
3061	>	fs := pb^[Field.Offset];
3062	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
3063	>	end;
3064	>
3065	>	function TIBCustomDataSet.GetArray(Field: TIBArrayField): IArray;
3066	>	var Buff: PChar;
3067	>	pda: PArrayDataArray;
3068	>	bTr, bDB: Boolean;
3069	>	begin
3070	>	if (Field = nil) or (Field.DataSet <> self) then
3071	>	IBError(ibxFieldNotinDataSet,[Field.Name,Name]);
3072	>	Buff := GetActiveBuf;
3073	>	if Buff = nil then
3074	>	Result := Database.Attachment.CreateArray(Transaction.TransactionIntf,
3075	>	Field.FRelationName,Field.FieldName)
3076	>	else
3077	>	begin
3078	>	pda := PArrayDataArray(Buff + FArrayCacheOffset);
3079	>	if pda^[Field.FCacheOffset] = nil then
3080	>	begin
3081	>	AdjustRecordOnInsert(Buff);
3082	>	if Field.IsNull then
3083	>	Result := Database.Attachment.CreateArray(Transaction.TransactionIntf,
3084	>	Field.FRelationName,Field.FieldName)
3085	>	else
3086	>	Result := Database.Attachment.OpenArray(Transaction.TransactionIntf,
3087	>	Field.FRelationName,Field.FieldName,Field.ArrayID);
3088	>	pda^[Field.FCacheOffset] := TIBArray.Create(Field,Result);
3089	>	FArrayList.Add(pda^[Field.FCacheOffset]);
3090	>	if (CachedUpdates) then
3091	>	begin
3092	>	bTr := not Transaction.InTransaction;
3093	>	bDB := not Database.Connected;
3094	>	if bDB then
3095	>	Database.Open;
3096	>	if bTr then
3097	>	Transaction.StartTransaction;
3098	>	pda^[Field.FCacheOffset].ArrayIntf.PreLoad;
3099	>	if bTr then
3100	>	Transaction.Commit;
3101	>	if bDB then
3102	>	Database.Close;
3103	>	end;
3104	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
3105	>	end
3106	>	else
3107	>	Result := pda^[Field.FCacheOffset].ArrayIntf;
3108	>	end;
3109	>	end;
3110	>
3111	>	procedure TIBCustomDataSet.SetArrayIntf(AnArray: IArray; Field: TIBArrayField);
3112	>	var Buff: PChar;
3113	>	pda: PArrayDataArray;
3114	>	begin
3115	>	if (Field = nil) or (Field.DataSet <> self) then
3116	>	IBError(ibxFieldNotinDataSet,[Field.Name,Name]);
3117	>	Buff := GetActiveBuf;
3118	>	if Buff <> nil then
3119	>	begin
3120	>	AdjustRecordOnInsert(Buff);
3121	>	pda := PArrayDataArray(Buff + FArrayCacheOffset);
3122	>	pda^[Field.FCacheOffset].FArray := AnArray;
3123	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
3124	>	end;
3125	>	end;
3126	>
3127	>	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
3128	>	const
3129	>	CMPLess = -1;
3130	>	CMPEql  =  0;
3131	>	CMPGtr  =  1;
3132	>	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
3133	>	(CMPGtr, CMPEql));
3134	>	begin
3135	>	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
3136	>
3137	>	if Result = 2 then
3138	>	begin
3139	>	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
3140	>	Result := CMPLess
3141	>	else
3142	>	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
3143	>	Result := CMPGtr
3144	>	else
3145	>	Result := CMPEql;
3146	>	end;
3147	>	end;
3148	>
3149	>	procedure TIBCustomDataSet.DoBeforeDelete;
3150	>	var
3151	>	Buff: PRecordData;
3152	>	begin
3153	>	if not CanDelete then
3154	>	IBError(ibxeCannotDelete, [nil]);
3155	>	Buff := PRecordData(GetActiveBuf);
3156	>	if FCachedUpdates and
3157	>	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
3158	>	SaveOldBuffer(PChar(Buff));
3159	>	inherited DoBeforeDelete;
3160	>	end;
3161	>
3162	>	procedure TIBCustomDataSet.DoAfterDelete;
3163	>	begin
3164	>	inherited DoAfterDelete;
3165	>	FBase.DoAfterDelete(self);
3166	>	InternalAutoCommit;
3167	>	end;
3168	>
3169	>	procedure TIBCustomDataSet.DoBeforeEdit;
3170	>	var
3171	>	Buff: PRecordData;
3172	>	begin
3173	>	Buff := PRecordData(GetActiveBuf);
3174	>	if not(CanEdit or (FQModify.SQL.Count <> 0) or
3175	>	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
3176	>	IBError(ibxeCannotUpdate, [nil]);
3177	>	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
3178	>	SaveOldBuffer(PChar(Buff));
3179	>	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
3180	>	inherited DoBeforeEdit;
3181	>	end;
3182	>
3183	>	procedure TIBCustomDataSet.DoAfterEdit;
3184	>	begin
3185	>	inherited DoAfterEdit;
3186	>	FBase.DoAfterEdit(self);
3187	>	end;
3188	>
3189	>	procedure TIBCustomDataSet.DoBeforeInsert;
3190	>	begin
3191	>	if not CanInsert then
3192	>	IBError(ibxeCannotInsert, [nil]);
3193	>	inherited DoBeforeInsert;
3194	>	end;
3195	>
3196	>	procedure TIBCustomDataSet.DoAfterInsert;
3197	>	begin
3198	>	if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
3199	>	GeneratorField.Apply;
3200	>	inherited DoAfterInsert;
3201	>	FBase.DoAfterInsert(self);
3202	>	end;
3203	>
3204	>	procedure TIBCustomDataSet.DoBeforeClose;
3205	>	begin
3206	>	inherited DoBeforeClose;
3207	>	if FInTransactionEnd and (FCloseAction = TARollback) then
3208	>	Exit;
3209	>	if State in [dsInsert,dsEdit] then
3210	>	begin
3211	>	if DataSetCloseAction = dcSaveChanges then
3212	>	Post;
3213	>	{Note this can fail with an exception e.g. due to
3214	>	database validation error. In which case the dataset remains open }
3215	>	end;
3216	>	if FCachedUpdates and FUpdatesPending and (DataSetCloseAction = dcSaveChanges) then
3217	>	ApplyUpdates;
3218	>	end;
3219	>
3220	>	procedure TIBCustomDataSet.DoBeforeOpen;
3221	>	var i: integer;
3222	>	begin
3223	>	if assigned(FParser) then
3224	>	FParser.Reset;
3225	>	for i := 0 to FIBLinks.Count - 1 do
3226	>	TIBControlLink(FIBLinks[i]).UpdateSQL(self);
3227	>	inherited DoBeforeOpen;
3228	>	for i := 0 to FIBLinks.Count - 1 do
3229	>	TIBControlLink(FIBLinks[i]).UpdateParams(self);
3230	>	end;
3231	>
3232	>	procedure TIBCustomDataSet.DoBeforePost;
3233	>	begin
3234	>	inherited DoBeforePost;
3235	>	if (State = dsInsert) and
3236	>	(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
3237	>	GeneratorField.Apply
3238	>	end;
3239	>
3240	>	procedure TIBCustomDataSet.DoAfterPost;
3241	>	begin
3242	>	inherited DoAfterPost;
3243	>	FBase.DoAfterPost(self);
3244	>	InternalAutoCommit;
3245	>	end;
3246	>
3247	>	procedure TIBCustomDataSet.FetchAll;
3248	>	var
3249	>	CurBookmark: TBookmark;
3250	>	begin
3251	>	FBase.SetCursor;
3252	>	try
3253	>	if FQSelect.EOF or not FQSelect.Open then
3254	>	exit;
3255	>	DisableControls;
3256	>	try
3257	>	CurBookmark := Bookmark;
3258	>	Last;
3259	>	Bookmark := CurBookmark;
3260	>	finally
3261	>	EnableControls;
3262	>	end;
3263	>	finally
3264	>	FBase.RestoreCursor;
3265	>	end;
3266	>	end;
3267	>
3268	>	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
3269	>	begin
3270	>	FreeMem(Buffer);
3271	>	Buffer := nil;
3272	>	end;
3273	>
3274	>	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
3275	>	begin
3276	>	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
3277	>	end;
3278	>
3279	>	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
3280	>	begin
3281	>	result := PRecordData(Buffer)^.rdBookmarkFlag;
3282	>	end;
3283	>
3284	>	function TIBCustomDataSet.GetCanModify: Boolean;
3285	>	begin
3286	>	result := (FQInsert.SQL.Text <> '') or
3287	>	(FQModify.SQL.Text <> '') or
3288	>	(FQDelete.SQL.Text <> '') or
3289	>	(Assigned(FUpdateObject));
3290	>	end;
3291	>
3292	>	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
3293	>	begin
3294	>	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
3295	>	begin
3296	>	UpdateCursorPos;
3297	>	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
3298	>	result := True;
3299	>	end
3300	>	else
3301	>	result := False;
3302	>	end;
3303	>
3304	>	function TIBCustomDataSet.GetDataSource: TDataSource;
3305	>	begin
3306	>	if FDataLink = nil then
3307	>	result := nil
3308	>	else
3309	>	result := FDataLink.DataSource;
3310	>	end;
3311	>
3312	>	function TIBCustomDataSet.GetDBAliasName(FieldNo: integer): string;
3313	>	begin
3314	>	Result := FAliasNameMap[FieldNo-1]
3315	>	end;
3316	>
3317	>	function TIBCustomDataSet.GetFieldDefFromAlias(aliasName: string): TFieldDef;
3318	>	var
3319	>	i: integer;
3320	>	begin
3321	>	Result := nil;
3322	>	for i := 0 to Length(FAliasNameMap) - 1 do
3323	>	if FAliasNameMap[i] = aliasName then
3324	>	begin
3325	>	Result := FieldDefs[i];
3326	>	Exit
3327	>	end;
3328	>	end;
3329	>
3330	>	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
3331	>	begin
3332	>	Result := DefaultFieldClasses[FieldType];
3333	>	end;
3334	>
3335	>	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
3336	>	begin
3337	>	result := GetFieldData(FieldByNumber(FieldNo), buffer);
3338	>	end;
3339	>
3340	>	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
3341	>	var
3342	>	Buff, Data: PChar;
3343	>	CurrentRecord: PRecordData;
3344	>	begin
3345	>	result := False;
3346	>	Buff := GetActiveBuf;
3347	>	if (Buff = nil) or
3348	>	(not IsVisible(Buff)) or not assigned(Field.DataSet) then
3349	>	exit;
3350	>	{ The intention here is to stuff the buffer with the data for the
3351	>	referenced field for the current record }
3352	>	CurrentRecord := PRecordData(Buff);
3353	>	if (Field.FieldNo < 0) then
3354	>	begin
3355	>	Inc(Buff, FRecordSize + Field.Offset);
3356	>	result := Boolean(Buff[0]);
3357	>	if result and (Buffer <> nil) then
3358	>	Move(Buff[1], Buffer^, Field.DataSize);
3359	>	end
3360	>	else
3361	>	if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
3362	>	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
3363	>	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]],
3364	>	FFieldColumns^[FMappedFieldPosition[Field.FieldNo - 1]] do
3365	>	begin
3366	>	result := not fdIsNull;
3367	>	if result and (Buffer <> nil) then
3368	>	begin
3369	>	Data := Buff + fdDataOfs;
3370	>	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
3371	>	begin
3372	>	if fdDataLength < Field.DataSize then
3373	>	begin
3374	>	Move(Data^, Buffer^, fdDataLength);
3375	>	PChar(Buffer)[fdDataLength] := #0;
3376	>	end
3377	>	else
3378	>	IBError(ibxeFieldSizeError,[Field.FieldName])
3379	>	end
3380	>	else
3381	>	Move(Data^, Buffer^, Field.DataSize);
3382	>	end;
3383	>	end;
3384	>	end;
3385	>
3386	>	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
3387	>	opposed to 0-based indexes.
3388	>	This is because we want LastRecordNumber/RecordCount = 1 }
3389	>
3390	>	function TIBCustomDataSet.GetRecNo: Integer;
3391	>	begin
3392	>	if GetActiveBuf = nil then
3393	>	result := 0
3394	>	else
3395	>	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
3396	>	end;
3397	>
3398	>	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
3399	>	DoCheck: Boolean): TGetResult;
3400	>	var
3401	>	Accept: Boolean;
3402	>	SaveState: TDataSetState;
3403	>	begin
3404	>	Result := grOK;
3405	>	if Filtered and Assigned(OnFilterRecord) then
3406	>	begin
3407	>	Accept := False;
3408	>	SaveState := SetTempState(dsFilter);
3409	>	while not Accept do
3410	>	begin
3411	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
3412	>	if Result <> grOK then
3413	>	break;
3414	>	FFilterBuffer := Buffer;
3415	>	try
3416	>	Accept := True;
3417	>	OnFilterRecord(Self, Accept);
3418	>	if not Accept and (GetMode = gmCurrent) then
3419	>	GetMode := gmPrior;
3420	>	except
3421	>	//        FBase.HandleException(Self);
3422	>	end;
3423	>	end;
3424	>	RestoreState(SaveState);
3425	>	end
3426	>	else
3427	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
3428	>	end;
3429	>
3430	>	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
3431	>	DoCheck: Boolean): TGetResult;
3432	>	begin
3433	>	result := grError;
3434	>	case GetMode of
3435	>	gmCurrent: begin
3436	>	if (FCurrentRecord >= 0) then begin
3437	>	if FCurrentRecord < FRecordCount then
3438	>	ReadRecordCache(FCurrentRecord, Buffer, False)
3439	>	else begin
3440	>	while (not FQSelect.EOF) and FQSelect.Next  and
3441	>	(FCurrentRecord >= FRecordCount) do begin
3442	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3443	>	Inc(FRecordCount);
3444	>	end;
3445	>	FCurrentRecord := FRecordCount - 1;
3446	>	if (FCurrentRecord >= 0) then
3447	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3448	>	end;
3449	>	result := grOk;
3450	>	end else
3451	>	result := grBOF;
3452	>	end;
3453	>	gmNext: begin
3454	>	result := grOk;
3455	>	if FCurrentRecord = FRecordCount then
3456	>	result := grEOF
3457	>	else if FCurrentRecord = FRecordCount - 1 then begin
3458	>	if (not FQSelect.EOF) then begin
3459	>	FQSelect.Next;
3460	>	Inc(FCurrentRecord);
3461	>	end;
3462	>	if (FQSelect.EOF) then begin
3463	>	result := grEOF;
3464	>	end else begin
3465	>	Inc(FRecordCount);
3466	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
3467	>	end;
3468	>	end else if (FCurrentRecord < FRecordCount) then begin
3469	>	Inc(FCurrentRecord);
3470	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3471	>	end;
3472	>	end;
3473	>	else { gmPrior }
3474	>	begin
3475	>	if (FCurrentRecord = 0) then begin
3476	>	Dec(FCurrentRecord);
3477	>	result := grBOF;
3478	>	end else if (FCurrentRecord > 0) and
3479	>	(FCurrentRecord <= FRecordCount) then begin
3480	>	Dec(FCurrentRecord);
3481	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3482	>	result := grOk;
3483	>	end else if (FCurrentRecord = -1) then
3484	>	result := grBOF;
3485	>	end;
3486	>	end;
3487	>	if result = grOk then
3488	>	result := AdjustCurrentRecord(Buffer, GetMode);
3489	>	if result = grOk then with PRecordData(Buffer)^ do begin
3490	>	rdBookmarkFlag := bfCurrent;
3491	>	GetCalcFields(Buffer);
3492	>	end else if (result = grEOF) then begin
3493	>	CopyRecordBuffer(FModelBuffer, Buffer);
3494	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
3495	>	end else if (result = grBOF) then begin
3496	>	CopyRecordBuffer(FModelBuffer, Buffer);
3497	>	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
3498	>	end else if (result = grError) then begin
3499	>	CopyRecordBuffer(FModelBuffer, Buffer);
3500	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
3501	>	end;;
3502	>	end;
3503	>
3504	>	function TIBCustomDataSet.GetRecordCount: Integer;
3505	>	begin
3506	>	result := FRecordCount - FDeletedRecords;
3507	>	end;
3508	>
3509	>	function TIBCustomDataSet.GetRecordSize: Word;
3510	>	begin
3511	>	result := FRecordBufferSize;
3512	>	end;
3513	>
3514	>	procedure TIBCustomDataSet.InternalAutoCommit;
3515	>	begin
3516	>	with Transaction do
3517	>	if InTransaction and (FAutoCommit = acCommitRetaining) then
3518	>	begin
3519	>	if CachedUpdates then ApplyUpdates;
3520	>	CommitRetaining;
3521	>	end;
3522	>	end;
3523	>
3524	>	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
3525	>	begin
3526	>	CheckEditState;
3527	>	begin
3528	>	{ When adding records, we *always* append.
3529	>	Insertion is just too costly }
3530	>	AdjustRecordOnInsert(Buffer);
3531	>	with PRecordData(Buffer)^ do
3532	>	begin
3533	>	rdUpdateStatus := usInserted;
3534	>	rdCachedUpdateStatus := cusInserted;
3535	>	end;
3536	>	if not CachedUpdates then
3537	>	InternalPostRecord(FQInsert, Buffer)
3538	>	else begin
3539	>	WriteRecordCache(FCurrentRecord, Buffer);
3540	>	FUpdatesPending := True;
3541	>	end;
3542	>	Inc(FRecordCount);
3543	>	InternalSetToRecord(Buffer);
3544	>	end
3545	>	end;
3546	>
3547	>	procedure TIBCustomDataSet.InternalCancel;
3548	>	var
3549	>	Buff: PChar;
3550	>	CurRec: Integer;
3551	>	pda: PArrayDataArray;
3552	>	i: integer;
3553	>	begin
3554	>	inherited InternalCancel;
3555	>	Buff := GetActiveBuf;
3556	>	if Buff <> nil then
3557	>	begin
3558	>	pda := PArrayDataArray(Buff + FArrayCacheOffset);
3559	>	for i := 0 to ArrayFieldCount - 1 do
3560	>	pda^[i].ArrayIntf.CancelChanges;
3561	>	CurRec := FCurrentRecord;
3562	>	AdjustRecordOnInsert(Buff);
3563	>	if (State = dsEdit) then begin
3564	>	CopyRecordBuffer(FOldBuffer, Buff);
3565	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3566	>	end else begin
3567	>	CopyRecordBuffer(FModelBuffer, Buff);
3568	>	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
3569	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
3570	>	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
3571	>	FCurrentRecord := CurRec;
3572	>	end;
3573	>	end;
3574	>	end;
3575	>
3576	>
3577	>	procedure TIBCustomDataSet.InternalClose;
3578	>	begin
3579	>	if FDidActivate then
3580	>	DeactivateTransaction;
3581	>	FQSelect.Close;
3582	>	ClearBlobCache;
3583	>	ClearArrayCache;
3584	>	FreeRecordBuffer(FModelBuffer);
3585	>	FreeRecordBuffer(FOldBuffer);
3586	>	FCurrentRecord := -1;
3587	>	FOpen := False;
3588	>	FRecordCount := 0;
3589	>	FDeletedRecords := 0;
3590	>	FRecordSize := 0;
3591	>	FBPos := 0;
3592	>	FOBPos := 0;
3593	>	FCacheSize := 0;
3594	>	FOldCacheSize := 0;
3595	>	FBEnd := 0;
3596	>	FOBEnd := 0;
3597	>	FreeMem(FBufferCache);
3598	>	FBufferCache := nil;
3599	>	FreeMem(FFieldColumns);
3600	>	FFieldColumns := nil;
3601	>	FreeMem(FOldBufferCache);
3602	>	FOldBufferCache := nil;
3603	>	BindFields(False);
3604	>	ResetParser;
3605	>	if DefaultFields then DestroyFields;
3606	>	end;
3607	>
3608	>	procedure TIBCustomDataSet.InternalDelete;
3609	>	var
3610	>	Buff: PChar;
3611	>	begin
3612	>	FBase.SetCursor;
3613	>	try
3614	>	Buff := GetActiveBuf;
3615	>	if CanDelete then
3616	>	begin
3617	>	if not CachedUpdates then
3618	>	InternalDeleteRecord(FQDelete, Buff)
3619	>	else
3620	>	begin
3621	>	with PRecordData(Buff)^ do
3622	>	begin
3623	>	if rdCachedUpdateStatus = cusInserted then
3624	>	rdCachedUpdateStatus := cusUninserted
3625	>	else begin
3626	>	rdUpdateStatus := usDeleted;
3627	>	rdCachedUpdateStatus := cusDeleted;
3628	>	end;
3629	>	end;
3630	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3631	>	end;
3632	>	Inc(FDeletedRecords);
3633	>	FUpdatesPending := True;
3634	>	end else
3635	>	IBError(ibxeCannotDelete, [nil]);
3636	>	finally
3637	>	FBase.RestoreCursor;
3638	>	end;
3639	>	end;
3640	>
3641	>	procedure TIBCustomDataSet.InternalFirst;
3642	>	begin
3643	>	FCurrentRecord := -1;
3644	>	end;
3645	>
3646	>	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
3647	>	begin
3648	>	FCurrentRecord := PInteger(Bookmark)^;
3649	>	end;
3650	>
3651	>	procedure TIBCustomDataSet.InternalHandleException;
3652	>	begin
3653	>	FBase.HandleException(Self)
3654	>	end;
3655	>
3656	>	procedure TIBCustomDataSet.InternalInitFieldDefs;
3657	>	begin
3658	>	if not InternalPrepared then
3659	>	begin
3660	>	InternalPrepare;
3661	>	exit;
3662	>	end;
3663	>	FieldDefsFromQuery(FQSelect);
3664	>	end;
3665	>
3666	>	procedure TIBCustomDataSet.FieldDefsFromQuery(SourceQuery: TIBSQL);
3667	>	const
3668	>	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
3669	>	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
3670	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
3671	>	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
3672	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
3673	>	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
3674	>	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
3675	>	var
3676	>	FieldType: TFieldType;
3677	>	FieldSize: Word;
3678	>	FieldDataSize: integer;
3679	>	charSetID: short;
3680	>	CharSetSize: integer;
3681	>	CharSetName: RawByteString;
3682	>	FieldCodePage: TSystemCodePage;
3683	>	FieldNullable : Boolean;
3684	>	i, FieldPosition, FieldPrecision: Integer;
3685	>	FieldAliasName, DBAliasName: string;
3686	>	aRelationName, FieldName: string;
3687	>	Query : TIBSQL;
3688	>	FieldIndex: Integer;
3689	>	FRelationNodes : TRelationNode;
3690	>	aArrayDimensions: integer;
3691	>	aArrayBounds: TArrayBounds;
3692	>	ArrayMetaData: IArrayMetaData;
3693	>
3694	>	function Add_Node(Relation, Field : String) : TRelationNode;
3695	>	var
3696	>	FField : TFieldNode;
3697	>	begin
3698	>	if FRelationNodes.RelationName = '' then
3699	>	Result := FRelationNodes
3700	>	else
3701	>	begin
3702	>	Result := TRelationNode.Create;
3703	>	Result.NextRelation := FRelationNodes;
3704	>	end;
3705	>	Result.RelationName := Relation;
3706	>	FRelationNodes := Result;
3707	>	Query.Params[0].AsString := Relation;
3708	>	Query.ExecQuery;
3709	>	while not Query.Eof do
3710	>	begin
3711	>	FField := TFieldNode.Create;
3712	>	FField.FieldName := Query.Fields[2].AsString;
3713	>	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
3714	>	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
3715	>	FField.NextField := Result.FieldNodes;
3716	>	Result.FieldNodes := FField;
3717	>	Query.Next;
3718	>	end;
3719	>	Query.Close;
3720	>	end;
3721	>
3722	>	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
3723	>	var
3724	>	FRelation : TRelationNode;
3725	>	FField : TFieldNode;
3726	>	begin
3727	>	FRelation := FRelationNodes;
3728	>	while Assigned(FRelation) and
3729	>	(FRelation.RelationName <> Relation) do
3730	>	FRelation := FRelation.NextRelation;
3731	>	if not Assigned(FRelation) then
3732	>	FRelation := Add_Node(Relation, Field);
3733	>	Result := false;
3734	>	FField := FRelation.FieldNodes;
3735	>	while Assigned(FField) do
3736	>	if FField.FieldName = Field then
3737	>	begin
3738	>	Result := Ffield.COMPUTED_BLR;
3739	>	Exit;
3740	>	end
3741	>	else
3742	>	FField := Ffield.NextField;
3743	>	end;
3744	>
3745	>	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
3746	>	var
3747	>	FRelation : TRelationNode;
3748	>	FField : TFieldNode;
3749	>	begin
3750	>	FRelation := FRelationNodes;
3751	>	while Assigned(FRelation) and
3752	>	(FRelation.RelationName <> Relation) do
3753	>	FRelation := FRelation.NextRelation;
3754	>	if not Assigned(FRelation) then
3755	>	FRelation := Add_Node(Relation, Field);
3756	>	Result := false;
3757	>	FField := FRelation.FieldNodes;
3758	>	while Assigned(FField) do
3759	>	if FField.FieldName = Field then
3760	>	begin
3761	>	Result := Ffield.DEFAULT_VALUE;
3762	>	Exit;
3763	>	end
3764	>	else
3765	>	FField := Ffield.NextField;
3766	>	end;
3767	>
3768	>	Procedure FreeNodes;
3769	>	var
3770	>	FRelation : TRelationNode;
3771	>	FField : TFieldNode;
3772	>	begin
3773	>	while Assigned(FRelationNodes) do
3774	>	begin
3775	>	While Assigned(FRelationNodes.FieldNodes) do
3776	>	begin
3777	>	FField := FRelationNodes.FieldNodes.NextField;
3778	>	FRelationNodes.FieldNodes.Free;
3779	>	FRelationNodes.FieldNodes := FField;
3780	>	end;
3781	>	FRelation := FRelationNodes.NextRelation;
3782	>	FRelationNodes.Free;
3783	>	FRelationNodes := FRelation;
3784	>	end;
3785	>	end;
3786	>
3787	>	begin
3788	>	FRelationNodes := TRelationNode.Create;
3789	>	FNeedsRefresh := False;
3790	>	if not Database.InternalTransaction.InTransaction then
3791	>	Database.InternalTransaction.StartTransaction;
3792	>	Query := TIBSQL.Create(self);
3793	>	try
3794	>	Query.Database := DataBase;
3795	>	Query.Transaction := Database.InternalTransaction;
3796	>	FieldDefs.BeginUpdate;
3797	>	FieldDefs.Clear;
3798	>	FieldIndex := 0;
3799	>	if (Length(FMappedFieldPosition) < SourceQuery.MetaData.Count) then
3800	>	SetLength(FMappedFieldPosition, SourceQuery.MetaData.Count);
3801	>	Query.SQL.Text := DefaultSQL;
3802	>	Query.Prepare;
3803	>	SetLength(FAliasNameMap, SourceQuery.MetaData.Count);
3804	>	SetLength(FAliasNameList, SourceQuery.MetaData.Count);
3805	>	for i := 0 to SourceQuery.MetaData.GetCount - 1 do
3806	>	with SourceQuery.MetaData[i] do
3807	>	begin
3808	>	{ Get the field name }
3809	>	FieldAliasName := GetName;
3810	>	DBAliasName := GetAliasname;
3811	>	aRelationName := getRelationName;
3812	>	FieldName := getSQLName;
3813	>	FAliasNameList[i] := DBAliasName;
3814	>	FieldSize := 0;
3815	>	FieldDataSize := 0;
3816	>	FieldPrecision := 0;
3817	>	FieldNullable := IsNullable;
3818	>	CharSetSize := 0;
3819	>	CharSetName := '';
3820	>	FieldCodePage := CP_NONE;
3821	>	aArrayDimensions := 0;
3822	>	SetLength(aArrayBounds,0);
3823	>	case SQLType of
3824	>	{ All VARCHAR's must be converted to strings before recording
3825	>	their values }
3826	>	SQL_VARYING, SQL_TEXT:
3827	>	begin
3828	>	if not Database.Attachment.CharSetWidth(getCharSetID,CharSetSize) then
3829	>	CharSetSize := 1;
3830	>	CharSetName := Database.Attachment.GetCharsetName(getCharSetID);
3831	>	Database.Attachment.CharSetID2CodePage(getCharSetID,FieldCodePage);
3832	>	FieldDataSize := GetSize;
3833	>	FieldSize := FieldDataSize div CharSetSize;
3834	>	FieldType := ftString;
3835	>	end;
3836	>	{ All Doubles/Floats should be cast to doubles }
3837	>	SQL_DOUBLE, SQL_FLOAT:
3838	>	FieldType := ftFloat;
3839	>	SQL_SHORT:
3840	>	begin
3841	>	if (getScale = 0) then
3842	>	FieldType := ftSmallInt
3843	>	else begin
3844	>	FieldType := ftBCD;
3845	>	FieldPrecision := 4;
3846	>	FieldSize := -getScale;
3847	>	FieldDataSize := FieldSize;
3848	>	end;
3849	>	end;
3850	>	SQL_LONG:
3851	>	begin
3852	>	if (getScale = 0) then
3853	>	FieldType := ftInteger
3854	>	else if (getScale >= (-4)) then
3855	>	begin
3856	>	FieldType := ftBCD;
3857	>	FieldPrecision := 9;
3858	>	FieldSize := -getScale;
3859	>	end
3860	>	else
3861	>	if Database.SQLDialect = 1 then
3862	>	FieldType := ftFloat
3863	>	else
3864	>	if (FieldCount > i) and (Fields[i] is TFloatField) then
3865	>	FieldType := ftFloat
3866	>	else
3867	>	begin
3868	>	FieldType := ftFMTBCD;
3869	>	FieldPrecision := 9;
3870	>	FieldSize := -getScale;
3871	>	end;
3872	>	FieldDataSize := FieldSize;
3873	>	end;
3874	>
3875	>	SQL_INT64:
3876	>	begin
3877	>	if (getScale = 0) then
3878	>	FieldType := ftLargeInt
3879	>	else if (getScale >= (-4)) then
3880	>	begin
3881	>	FieldType := ftBCD;
3882	>	FieldPrecision := 18;
3883	>	FieldSize := -getScale;
3884	>	end
3885	>	else
3886	>	FieldType := ftFloat;
3887	>	FieldDataSize := FieldSize;
3888	>	end;
3889	>	SQL_TIMESTAMP: FieldType := ftDateTime;
3890	>	SQL_TYPE_TIME: FieldType := ftTime;
3891	>	SQL_TYPE_DATE: FieldType := ftDate;
3892	>	SQL_BLOB:
3893	>	begin
3894	>	FieldSize := sizeof (TISC_QUAD);
3895	>	if (getSubtype = 1) then
3896	>	begin
3897	>	if not Database.Attachment.CharSetWidth(getCharSetID,CharSetSize) then
3898	>	CharSetSize := 1;
3899	>	CharSetName := Database.Attachment.GetCharsetName(getCharSetID);
3900	>	Database.Attachment.CharSetID2CodePage(getCharSetID,FieldCodePage);
3901	>	FieldType := ftMemo;
3902	>	end
3903	>	else
3904	>	FieldType := ftBlob;
3905	>	FieldDataSize := FieldSize;
3906	>	end;
3907	>	SQL_ARRAY:
3908	>	begin
3909	>	FieldSize := sizeof (TISC_QUAD);
3910	>	FieldDataSize := FieldSize;
3911	>	FieldType := ftArray;
3912	>	ArrayMetaData := GetArrayMetaData;
3913	>	if ArrayMetaData <> nil then
3914	>	begin
3915	>	aArrayDimensions := ArrayMetaData.GetDimensions;
3916	>	aArrayBounds := ArrayMetaData.GetBounds;
3917	>	end;
3918	>	end;
3919	>	SQL_BOOLEAN:
3920	>	FieldType:= ftBoolean;
3921	>	else
3922	>	FieldType := ftUnknown;
3923	>	end;
3924	>	FieldPosition := i + 1;
3925	>	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
3926	>	begin
3927	>	FMappedFieldPosition[FieldIndex] := FieldPosition;
3928	>	Inc(FieldIndex);
3929	>	with TIBFieldDef.Create(FieldDefs,'',FieldType,0,False,FieldDefs.Count+1) do
3930	>	begin
3931	>	Name := FieldAliasName;
3932	>	FAliasNameMap[FieldNo-1] := DBAliasName;
3933	>	Size := FieldSize;
3934	>	DataSize := FieldDataSize;
3935	>	Precision := FieldPrecision;
3936	>	Required := not FieldNullable;
3937	>	RelationName := aRelationName;
3938	>	InternalCalcField := False;
3939	>	CharacterSetSize := CharSetSize;
3940	>	CharacterSetName := CharSetName;
3941	>	CodePage := FieldCodePage;
3942	>	ArrayDimensions := aArrayDimensions;
3943	>	ArrayBounds := aArrayBounds;
3944	>	if (FieldName <> '') and (RelationName <> '') then
3945	>	begin
3946	>	if Has_COMPUTED_BLR(RelationName, FieldName) then
3947	>	begin
3948	>	Attributes := [faReadOnly];
3949	>	InternalCalcField := True;
3950	>	FNeedsRefresh := True;
3951	>	end
3952	>	else
3953	>	begin
3954	>	if Has_DEFAULT_VALUE(RelationName, FieldName) then
3955	>	begin
3956	>	if not FieldNullable then
3957	>	Attributes := [faRequired];
3958	>	end
3959	>	else
3960	>	FNeedsRefresh := True;
3961	>	end;
3962	>	end;
3963	>	end;
3964	>	end;
3965	>	end;
3966	>	finally
3967	>	Query.free;
3968	>	FreeNodes;
3969	>	Database.InternalTransaction.Commit;
3970	>	FieldDefs.EndUpdate;
3971	>	FieldDefs.Updated := true;
3972	>	end;
3973	>	end;
3974	>
3975	>	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
3976	>	begin
3977	>	CopyRecordBuffer(FModelBuffer, Buffer);
3978	>	end;
3979	>
3980	>	procedure TIBCustomDataSet.InternalLast;
3981	>	var
3982	>	Buffer: PChar;
3983	>	begin
3984	>	if (FQSelect.EOF) then
3985	>	FCurrentRecord := FRecordCount
3986	>	else begin
3987	>	Buffer := AllocRecordBuffer;
3988	>	try
3989	>	while FQSelect.Next do
3990	>	begin
3991	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3992	>	Inc(FRecordCount);
3993	>	end;
3994	>	FCurrentRecord := FRecordCount;
3995	>	finally
3996	>	FreeRecordBuffer(Buffer);
3997	>	end;
3998	>	end;
3999	>	end;
4000	>
4001	>	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
4002	>	var
4003	>	i: Integer;
4004	>	cur_param: ISQLParam;
4005	>	cur_field: TField;
4006	>	s: TStream;
4007	>	begin
4008	>	if FQSelect.SQL.Text = '' then
4009	>	IBError(ibxeEmptyQuery, [nil]);
4010	>	if not FInternalPrepared then
4011	>	InternalPrepare;
4012	>	if (SQLParams.GetCount > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
4013	>	begin
4014	>	for i := 0 to SQLParams.GetCount - 1 do
4015	>	begin
4016	>	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
4017	>	cur_param := SQLParams[i];
4018	>	if (cur_field <> nil) then begin
4019	>	if (cur_field.IsNull) then
4020	>	cur_param.IsNull := True
4021	>	else case cur_field.DataType of
4022	>	ftString:
4023	>	cur_param.AsString := cur_field.AsString;
4024	>	ftBoolean:
4025	>	cur_param.AsBoolean := cur_field.AsBoolean;
4026	>	ftSmallint, ftWord:
4027	>	cur_param.AsShort := cur_field.AsInteger;
4028	>	ftInteger:
4029	>	cur_param.AsLong := cur_field.AsInteger;
4030	>	ftLargeInt:
4031	>	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
4032	>	ftFloat, ftCurrency:
4033	>	cur_param.AsDouble := cur_field.AsFloat;
4034	>	ftBCD:
4035	>	cur_param.AsCurrency := cur_field.AsCurrency;
4036	>	ftDate:
4037	>	cur_param.AsDate := cur_field.AsDateTime;
4038	>	ftTime:
4039	>	cur_param.AsTime := cur_field.AsDateTime;
4040	>	ftDateTime:
4041	>	cur_param.AsDateTime := cur_field.AsDateTime;
4042	>	ftBlob, ftMemo:
4043	>	begin
4044	>	s := nil;
4045	>	try
4046	>	s := DataSource.DataSet.
4047	>	CreateBlobStream(cur_field, bmRead);
4048	>	cur_param.AsBlob := TIBDSBlobStream(s).FBlobStream.Blob;
4049	>	finally
4050	>	s.free;
4051	>	end;
4052	>	end;
4053	>	ftArray:
4054	>	cur_param.AsArray := TIBArrayField(cur_field).ArrayIntf;
4055	>	else
4056	>	IBError(ibxeNotSupported, [nil]);
4057	>	end;
4058	>	end;
4059	>	end;
4060	>	end;
4061	>	end;
4062	>
4063	>	procedure TIBCustomDataSet.ReQuery;
4064	>	begin
4065	>	FQSelect.Close;
4066	>	ClearBlobCache;
4067	>	FCurrentRecord := -1;
4068	>	FRecordCount := 0;
4069	>	FDeletedRecords := 0;
4070	>	FBPos := 0;
4071	>	FOBPos := 0;
4072	>	FBEnd := 0;
4073	>	FOBEnd := 0;
4074	>	FQSelect.Close;
4075	>	FQSelect.ExecQuery;
4076	>	FOpen := FQSelect.Open;
4077	>	First;
4078	>	end;
4079	>
4080	>	procedure TIBCustomDataSet.InternalOpen;
4081	>
4082	>	function RecordDataLength(n: Integer): Long;
4083	>	begin
4084	>	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
4085	>	end;
4086	>
4087	>	begin
4088	>	FBase.SetCursor;
4089	>	try
4090	>	ActivateConnection;
4091	>	ActivateTransaction;
4092	>	if FQSelect.SQL.Text = '' then
4093	>	IBError(ibxeEmptyQuery, [nil]);
4094	>	if not FInternalPrepared then
4095	>	InternalPrepare;
4096	>	if FQSelect.SQLStatementType = SQLSelect then
4097	>	begin
4098	>	if DefaultFields then
4099	>	CreateFields;
4100	>	FArrayFieldCount := 0;
4101	>	BindFields(True);
4102	>	FCurrentRecord := -1;
4103	>	FQSelect.ExecQuery;
4104	>	FOpen := FQSelect.Open;
4105	>
4106	>	{ Initialize offsets, buffer sizes, etc...
4107	>	1. Initially FRecordSize is just the "RecordDataLength".
4108	>	2. Allocate a "model" buffer and do a dummy fetch
4109	>	3. After the dummy fetch, FRecordSize will be appropriately
4110	>	adjusted to reflect the additional "weight" of the field
4111	>	data.
4112	>	4. Set up the FCalcFieldsOffset, FBlobCacheOffset, FArrayCacheOffset and FRecordBufferSize.
4113	>	5. Now, with the BufferSize available, allocate memory for chunks of records
4114	>	6. Re-allocate the model buffer, accounting for the new
4115	>	FRecordBufferSize.
4116	>	7. Finally, calls to AllocRecordBuffer will work!.
4117	>	}
4118	>	{Step 1}
4119	>	FRecordSize := RecordDataLength(FQSelect.FieldCount);
4120	>	{Step 2, 3}
4121	>	GetMem(FFieldColumns,sizeof(TFieldColumns) * (FQSelect.FieldCount));
4122	>	IBAlloc(FModelBuffer, 0, FRecordSize);
4123	>	InitModelBuffer(FQSelect, FModelBuffer);
4124	>	{Step 4}
4125	>	FCalcFieldsOffset := FRecordSize;
4126	>	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
4127	>	FArrayCacheOffset := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
4128	>	FRecordBufferSize := FArrayCacheOffset + (ArrayFieldCount * sizeof(IArray));
4129	>	{Step 5}
4130	>	if UniDirectional then
4131	>	FBufferChunkSize := FRecordBufferSize * UniCache
4132	>	else
4133	>	FBufferChunkSize := FRecordBufferSize * BufferChunks;
4134	>	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
4135	>	if FCachedUpdates or (csReading in ComponentState) then
4136	>	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
4137	>	FBPos := 0;
4138	>	FOBPos := 0;
4139	>	FBEnd := 0;
4140	>	FOBEnd := 0;
4141	>	FCacheSize := FBufferChunkSize;
4142	>	FOldCacheSize := FBufferChunkSize;
4143	>	{Step 6}
4144	>	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.FieldCount),
4145	>	FRecordBufferSize);
4146	>	{Step 7}
4147	>	FOldBuffer := AllocRecordBuffer;
4148	>	end
4149	>	else
4150	>	FQSelect.ExecQuery;
4151	>	finally
4152	>	FBase.RestoreCursor;
4153	>	end;
4154	>	end;
4155	>
4156	>	procedure TIBCustomDataSet.InternalPost;
4157	>	var
4158	>	Qry: TIBSQL;
4159	>	Buff: PChar;
4160	>	bInserting: Boolean;
4161	>	begin
4162	>	FBase.SetCursor;
4163	>	try
4164	>	Buff := GetActiveBuf;
4165	>	CheckEditState;
4166	>	AdjustRecordOnInsert(Buff);
4167	>	if (State = dsInsert) then
4168	>	begin
4169	>	bInserting := True;
4170	>	Qry := FQInsert;
4171	>	PRecordData(Buff)^.rdUpdateStatus := usInserted;
4172	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
4173	>	WriteRecordCache(FRecordCount, Buff);
4174	>	FCurrentRecord := FRecordCount;
4175	>	end
4176	>	else begin
4177	>	bInserting := False;
4178	>	Qry := FQModify;
4179	>	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
4180	>	begin
4181	>	PRecordData(Buff)^.rdUpdateStatus := usModified;
4182	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
4183	>	end
4184	>	else if PRecordData(Buff)^.
4185	>	rdCachedUpdateStatus = cusUninserted then
4186	>	begin
4187	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
4188	>	Dec(FDeletedRecords);
4189	>	end;
4190	>	end;
4191	>	if (not CachedUpdates) then
4192	>	InternalPostRecord(Qry, Buff)
4193	>	else begin
4194	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
4195	>	FUpdatesPending := True;
4196	>	end;
4197	>	if bInserting then
4198	>	Inc(FRecordCount);
4199	>	finally
4200	>	FBase.RestoreCursor;
4201	>	end;
4202	>	end;
4203	>
4204	>	procedure TIBCustomDataSet.InternalRefresh;
4205	>	begin
4206	>	inherited InternalRefresh;
4207	>	InternalRefreshRow;
4208	>	end;
4209	>
4210	>	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
4211	>	begin
4212	>	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
4213	>	end;
4214	>
4215	>	function TIBCustomDataSet.IsCursorOpen: Boolean;
4216	>	begin
4217	>	result := FOpen;
4218	>	end;
4219	>
4220	>	procedure TIBCustomDataSet.Loaded;
4221	>	begin
4222	>	if assigned(FQSelect) then
4223	>	FBaseSQLSelect.assign(FQSelect.SQL);
4224	>	inherited Loaded;
4225	>	end;
4226	>
4227	>	procedure TIBCustomDataSet.Post;
4228	>	var CancelPost: boolean;
4229	>	begin
4230	>	CancelPost := false;
4231	>	if assigned(FOnValidatePost) then
4232	>	OnValidatePost(self,CancelPost);
4233	>	if CancelPost then
4234	>	Cancel
4235	>	else
4236	>	inherited Post;
4237	>	end;
4238	>
4239	>	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
4240	>	Options: TLocateOptions): Boolean;
4241	>	var
4242	>	CurBookmark: TBookmark;
4243	>	begin
4244	>	DisableControls;
4245	>	try
4246	>	CurBookmark := Bookmark;
4247	>	First;
4248	>	result := InternalLocate(KeyFields, KeyValues, Options);
4249	>	if not result then
4250	>	Bookmark := CurBookmark;
4251	>	finally
4252	>	EnableControls;
4253	>	end;
4254	>	end;
4255	>
4256	>	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
4257	>	const ResultFields: string): Variant;
4258	>	var
4259	>	fl: TList;
4260	>	CurBookmark: TBookmark;
4261	>	begin
4262	>	DisableControls;
4263	>	fl := TList.Create;
4264	>	CurBookmark := Bookmark;
4265	>	try
4266	>	First;
4267	>	if InternalLocate(KeyFields, KeyValues, []) then
4268	>	begin
4269	>	if (ResultFields <> '') then
4270	>	result := FieldValues[ResultFields]
4271	>	else
4272	>	result := NULL;
4273	>	end
4274	>	else
4275	>	result := Null;
4276	>	finally
4277	>	Bookmark := CurBookmark;
4278	>	fl.Free;
4279	>	EnableControls;
4280	>	end;
4281	>	end;
4282	>
4283	>	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
4284	>	begin
4285	>	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
4286	>	end;
4287	>
4288	>	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
4289	>	begin
4290	>	PRecordData(Buffer)^.rdBookmarkFlag := Value;
4291	>	end;
4292	>
4293	>	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
4294	>	begin
4295	>	if not Value and FCachedUpdates then
4296	>	CancelUpdates;
4297	>	if (not (csReading in ComponentState)) and Value then
4298	>	CheckDatasetClosed;
4299	>	FCachedUpdates := Value;
4300	>	end;
4301	>
4302	>	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
4303	>	begin
4304	>	if IsLinkedTo(Value) then
4305	>	IBError(ibxeCircularReference, [nil]);
4306	>	if FDataLink <> nil then
4307	>	FDataLink.DataSource := Value;
4308	>	end;
4309	>
4310	>	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
4311	>	var
4312	>	Buff, TmpBuff: PChar;
4313	>	MappedFieldPos: integer;
4314	>	begin
4315	>	Buff := GetActiveBuf;
4316	>	if Field.FieldNo < 0 then
4317	>	begin
4318	>	TmpBuff := Buff + FRecordSize + Field.Offset;
4319	>	Boolean(TmpBuff[0]) := LongBool(Buffer);
4320	>	if Boolean(TmpBuff[0]) then
4321	>	Move(Buffer^, TmpBuff[1], Field.DataSize);
4322	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
4323	>	end
4324	>	else begin
4325	>	CheckEditState;
4326	>	with PRecordData(Buff)^ do
4327	>	begin
4328	>	{ If inserting, Adjust record position }
4329	>	AdjustRecordOnInsert(Buff);
4330	>	MappedFieldPos := FMappedFieldPosition[Field.FieldNo - 1];
4331	>	if (MappedFieldPos > 0) and
4332	>	(MappedFieldPos <= rdFieldCount) then
4333	>	with rdFields[MappedFieldPos], FFieldColumns^[MappedFieldPos] do
4334	>	begin
4335	>	Field.Validate(Buffer);
4336	>	if (Buffer = nil) or
4337	>	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
4338	>	fdIsNull := True
4339	>	else
4340	>	begin
4341	>	Move(Buffer^, Buff[fdDataOfs],fdDataSize);
4342	>	if (fdDataType = SQL_TEXT) or (fdDataType = SQL_VARYING) then
4343	>	fdDataLength := StrLen(PChar(Buffer));
4344	>	fdIsNull := False;
4345	>	if rdUpdateStatus = usUnmodified then
4346	>	begin
4347	>	if CachedUpdates then
4348	>	begin
4349	>	FUpdatesPending := True;
4350	>	if State = dsInsert then
4351	>	rdCachedUpdateStatus := cusInserted
4352	>	else if State = dsEdit then
4353	>	rdCachedUpdateStatus := cusModified;
4354	>	end;
4355	>
4356	>	if State = dsInsert then
4357	>	rdUpdateStatus := usInserted
4358	>	else
4359	>	rdUpdateStatus := usModified;
4360	>	end;
4361	>	WriteRecordCache(rdRecordNumber, Buff);
4362	>	SetModified(True);
4363	>	end;
4364	>	end;
4365	>	end;
4366	>	end;
4367	>	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
4368	>	DataEvent(deFieldChange, PtrInt(Field));
4369	>	end;
4370	>
4371	>	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
4372	>	begin
4373	>	CheckBrowseMode;
4374	>	if (Value < 1) then
4375	>	Value := 1
4376	>	else if Value > FRecordCount then
4377	>	begin
4378	>	InternalLast;
4379	>	Value := Min(FRecordCount, Value);
4380	>	end;
4381	>	if (Value <> RecNo) then
4382	>	begin
4383	>	DoBeforeScroll;
4384	>	FCurrentRecord := Value - 1;
4385	>	Resync([]);
4386	>	DoAfterScroll;
4387	>	end;
4388	>	end;
4389	>
4390	>	procedure TIBCustomDataSet.Disconnect;
4391	>	begin
4392	>	Close;
4393	>	InternalUnPrepare;
4394	>	end;
4395	>
4396	>	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
4397	>	begin
4398	>	if not CanModify then
4399	>	IBError(ibxeCannotUpdate, [nil])
4400	>	else
4401	>	FUpdateMode := Value;
4402	>	end;
4403	>
4404	>
4405	>	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
4406	>	begin
4407	>	if Value <> FUpdateObject then
4408	>	begin
4409	>	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
4410	>	FUpdateObject.DataSet := nil;
4411	>	FUpdateObject := Value;
4412	>	if Assigned(FUpdateObject) then
4413	>	begin
4414	>	if Assigned(FUpdateObject.DataSet) and
4415	>	(FUpdateObject.DataSet <> Self) then
4416	>	FUpdateObject.DataSet.UpdateObject := nil;
4417	>	FUpdateObject.DataSet := Self;
4418	>	end;
4419	>	end;
4420	>	end;
4421	>
4422	>	function TIBCustomDataSet.ConstraintsStored: Boolean;
4423	>	begin
4424	>	Result := Constraints.Count > 0;
4425	>	end;
4426	>
4427	>	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
4428	>	begin
4429	>	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
4430	>	end;
4431	>
4432	>	procedure TIBCustomDataSet.ClearIBLinks;
4433	>	var i: integer;
4434	>	begin
4435	>	for i := FIBLinks.Count - 1 downto 0 do
4436	>	TIBControlLink(FIBLinks[i]).IBDataSet := nil;
4437	>	end;
4438	>
4439	>
4440	>	procedure TIBCustomDataSet.InternalUnPrepare;
4441	>	begin
4442	>	if FInternalPrepared then
4443	>	begin
4444	>	CheckDatasetClosed;
4445	>	if FDidActivate then
4446	>	DeactivateTransaction;
4447	>	FieldDefs.Clear;
4448	>	FieldDefs.Updated := false;
4449	>	FInternalPrepared := False;
4450	>	Setlength(FAliasNameList,0);
4451	>	end;
4452	>	end;
4453	>
4454	>	procedure TIBCustomDataSet.InternalExecQuery;
4455	>	var
4456	>	DidActivate: Boolean;
4457	>	begin
4458	>	DidActivate := False;
4459	>	FBase.SetCursor;
4460	>	try
4461	>	ActivateConnection;
4462	>	DidActivate := ActivateTransaction;
4463	>	if FQSelect.SQL.Text = '' then
4464	>	IBError(ibxeEmptyQuery, [nil]);
4465	>	if not FInternalPrepared then
4466	>	InternalPrepare;
4467	>	if FQSelect.SQLStatementType = SQLSelect then
4468	>	begin
4469	>	IBError(ibxeIsASelectStatement, [nil]);
4470	>	end
4471	>	else
4472	>	FQSelect.ExecQuery;
4473	>	finally
4474	>	if DidActivate then
4475	>	DeactivateTransaction;
4476	>	FBase.RestoreCursor;
4477	>	end;
4478	>	end;
4479	>
4480	>	function TIBCustomDataSet.GetSelectStmtIntf: IStatement;
4481	>	begin
4482	>	Result := FQSelect.Statement;
4483	>	end;
4484	>
4485	>	function TIBCustomDataSet.GetParser: TSelectSQLParser;
4486	>	begin
4487	>	if not assigned(FParser) then
4488	>	FParser := CreateParser;
4489	>	Result := FParser
4490	>	end;
4491	>
4492	>	procedure TIBCustomDataSet.ResetParser;
4493	>	begin
4494	>	if assigned(FParser) then
4495	>	begin
4496	>	FParser.Free;
4497	>	FParser := nil;
4498	>	FQSelect.OnSQLChanged := nil; {Do not react to change}
4499	>	try
4500	>	FQSelect.SQL.Assign(FBaseSQLSelect);
4501	>	finally
4502	>	FQSelect.OnSQLChanged := SQLChanged;
4503	>	end;
4504	>	end;
4505	>	end;
4506	>
4507	>	function TIBCustomDataSet.HasParser: boolean;
4508	>	begin
4509	>	Result := not (csDesigning in ComponentState) and (FParser <> nil)
4510	>	end;
4511	>
4512	>	procedure TIBCustomDataSet.SetGenerateParamNames(AValue: Boolean);
4513	>	begin
4514	>	if FGenerateParamNames = AValue then Exit;
4515	>	FGenerateParamNames := AValue;
4516	>	Disconnect
4517	>	end;
4518	>
4519	>	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
4520	>	begin
4521	>	inherited InitRecord(Buffer);
4522	>	with PRecordData(Buffer)^ do
4523	>	begin
4524	>	rdUpdateStatus := TUpdateStatus(usInserted);
4525	>	rdBookMarkFlag := bfInserted;
4526	>	rdRecordNumber := -1;
4527	>	end;
4528	>	end;
4529	>
4530	>	procedure TIBCustomDataSet.InternalInsert;
4531	>	begin
4532	>	CursorPosChanged;
4533	>	end;
4534	>
4535	>	{ TIBDataSet IProviderSupport }
4536	>
4537	>	procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
4538	>	begin
4539	>	if Commit then
4540	>	Transaction.Commit else
4541	>	Transaction.Rollback;
4542	>	end;
4543	>
4544	>	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
4545	>	ResultSet: Pointer = nil): Integer;
4546	>	var
4547	>	FQuery: TIBQuery;
4548	>	begin
4549	>	if Assigned(ResultSet) then
4550	>	begin
4551	>	TDataSet(ResultSet^) := TIBQuery.Create(nil);
4552	>	with TIBQuery(ResultSet^) do
4553	>	begin
4554	>	SQL.Text := ASQL;
4555	>	Params.Assign(AParams);
4556	>	Open;
4557	>	Result := RowsAffected;
4558	>	end;
4559	>	end
4560	>	else
4561	>	begin
4562	>	FQuery := TIBQuery.Create(nil);
4563	>	try
4564	>	FQuery.Database := Database;
4565	>	FQuery.Transaction := Transaction;
4566	>	FQuery.GenerateParamNames := True;
4567	>	FQuery.SQL.Text := ASQL;
4568	>	FQuery.Params.Assign(AParams);
4569	>	FQuery.ExecSQL;
4570	>	Result := FQuery.RowsAffected;
4571	>	finally
4572	>	FQuery.Free;
4573	>	end;
4574	>	end;
4575	>	end;
4576	>
4577	>	function TIBCustomDataSet.PSGetQuoteChar: string;
4578	>	begin
4579	>	if Database.SQLDialect = 3 then
4580	>	Result := '"' else
4581	>	Result := '';
4582	>	end;
4583	>
4584	>	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
4585	>	var
4586	>	PrevErr: Integer;
4587	>	begin
4588	>	if Prev <> nil then
4589	>	PrevErr := Prev.ErrorCode else
4590	>	PrevErr := 0;
4591	>	if E is EIBError then
4592	>	with EIBError(E) do
4593	>	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
4594	>	Result := inherited PSGetUpdateException(E, Prev);
4595	>	end;
4596	>
4597	>	function TIBCustomDataSet.PSInTransaction: Boolean;
4598	>	begin
4599	>	Result := Transaction.InTransaction;
4600	>	end;
4601	>
4602	>	function TIBCustomDataSet.PSIsSQLBased: Boolean;
4603	>	begin
4604	>	Result := True;
4605	>	end;
4606	>
4607	>	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
4608	>	begin
4609	>	Result := True;
4610	>	end;
4611	>
4612	>	procedure TIBCustomDataSet.PSReset;
4613	>	begin
4614	>	inherited PSReset;
4615	>	if Active then
4616	>	begin
4617	>	Close;
4618	>	Open;
4619	>	end;
4620	>	end;
4621	>
4622	>	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
4623	>	var
4624	>	UpdateAction: TIBUpdateAction;
4625	>	SQL: string;
4626	>	Params: TParams;
4627	>
4628	>	procedure AssignParams(DataSet: TDataSet; Params: TParams);
4629	>	var
4630	>	I: Integer;
4631	>	Old: Boolean;
4632	>	Param: TParam;
4633	>	PName: string;
4634	>	Field: TField;
4635	>	Value: Variant;
4636	>	begin
4637	>	for I := 0 to Params.Count - 1 do
4638	>	begin
4639	>	Param := Params[I];
4640	>	PName := Param.Name;
4641	>	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
4642	>	if Old then System.Delete(PName, 1, 4);
4643	>	Field := DataSet.FindField(PName);
4644	>	if not Assigned(Field) then Continue;
4645	>	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
4646	>	begin
4647	>	Value := Field.NewValue;
4648	>	if VarIsEmpty(Value) then Value := Field.OldValue;
4649	>	Param.AssignFieldValue(Field, Value);
4650	>	end;
4651	>	end;
4652	>	end;
4653	>
4654	>	begin
4655	>	Result := False;
4656	>	if Assigned(OnUpdateRecord) then
4657	>	begin
4658	>	UpdateAction := uaFail;
4659	>	if Assigned(FOnUpdateRecord) then
4660	>	begin
4661	>	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
4662	>	Result := UpdateAction = uaApplied;
4663	>	end;
4664	>	end
4665	>	else if Assigned(FUpdateObject) then
4666	>	begin
4667	>	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
4668	>	if SQL <> '' then
4669	>	begin
4670	>	Params := TParams.Create;
4671	>	try
4672	>	Params.ParseSQL(SQL, True);
4673	>	AssignParams(Delta, Params);
4674	>	if PSExecuteStatement(SQL, Params) = 0 then
4675	>	IBError(ibxeNoRecordsAffected, [nil]);
4676	>	Result := True;
4677	>	finally
4678	>	Params.Free;
4679	>	end;
4680	>	end;
4681	>	end;
4682	>	end;
4683	>
4684	>	procedure TIBCustomDataSet.PSStartTransaction;
4685	>	begin
4686	>	ActivateConnection;
4687	>	Transaction.StartTransaction;
4688	>	end;
4689	>
4690	>	function TIBCustomDataSet.PSGetTableName: string;
4691	>	begin
4692	>	//  if not FInternalPrepared then
4693	>	//    InternalPrepare;
4694	>	{ It is possible for the FQSelectSQL to be unprepared
4695	>	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
4696	>	So check the Prepared of the SelectSQL instead }
4697	>	if not FQSelect.Prepared then
4698	>	FQSelect.Prepare;
4699	>	Result := FQSelect.UniqueRelationName;
4700	>	end;
4701	>
4702	>	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
4703	>	begin
4704	>	InternalBatchInput(InputObject);
4705	>	end;
4706	>
4707	>	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
4708	>	begin
4709	>	InternalBatchOutput(OutputObject);
4710	>	end;
4711	>
4712	>	procedure TIBDataSet.ExecSQL;
4713	>	begin
4714	>	InternalExecQuery;
4715	>	end;
4716	>
4717	>	procedure TIBDataSet.Prepare;
4718	>	begin
4719	>	InternalPrepare;
4720	>	end;
4721	>
4722	>	procedure TIBDataSet.UnPrepare;
4723	>	begin
4724	>	InternalUnPrepare;
4725	>	end;
4726	>
4727	>	function TIBDataSet.GetPrepared: Boolean;
4728	>	begin
4729	>	Result := InternalPrepared;
4730	>	end;
4731	>
4732	>	procedure TIBDataSet.InternalOpen;
4733	>	begin
4734	>	ActivateConnection;
4735	>	ActivateTransaction;
4736	>	InternalSetParamsFromCursor;
4737	>	Inherited InternalOpen;
4738	>	end;
4739	>
4740	>	procedure TIBDataSet.SetFiltered(Value: Boolean);
4741	>	begin
4742	>	if(Filtered <> Value) then
4743	>	begin
4744	>	inherited SetFiltered(value);
4745	>	if Active then
4746	>	begin
4747	>	Close;
4748	>	Open;
4749	>	end;
4750	>	end
4751	>	else
4752	>	inherited SetFiltered(value);
4753	>	end;
4754	>
4755	>	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
4756	>	begin
4757	>	Result := false;
4758	>	if not Assigned(Bookmark) then
4759	>	exit;
4760	>	Result := PInteger(Bookmark)^ < FRecordCount;
4761	>	end;
4762	>
4763	>	function TIBCustomDataSet.GetFieldData(Field: TField;
4764	>	Buffer: Pointer): Boolean;
4765	>	{$IFDEF TBCDFIELD_IS_BCD}
4766	>	var
4767	>	lTempCurr : System.Currency;
4768	>	begin
4769	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4770	>	begin
4771	>	Result := InternalGetFieldData(Field, @lTempCurr);
4772	>	if Result then
4773	>	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
4774	>	end
4775	>	else
4776	>	{$ELSE}
4777	>	begin
4778	>	{$ENDIF}
4779	>	Result := InternalGetFieldData(Field, Buffer);
4780	>	end;
4781	>
4782	>	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
4783	>	NativeFormat: Boolean): Boolean;
4784	>	begin
4785	>	if (Field.DataType = ftBCD) and not NativeFormat then
4786	>	Result := InternalGetFieldData(Field, Buffer)
4787	>	else
4788	>	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
4789	>	end;
4790	>
4791	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
4792	>	{$IFDEF TDBDFIELD_IS_BCD}
4793	>	var
4794	>	lTempCurr : System.Currency;
4795	>	begin
4796	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4797	>	begin
4798	>	BCDToCurr(TBCD(Buffer^), lTempCurr);
4799	>	InternalSetFieldData(Field, @lTempCurr);
4800	>	end
4801	>	else
4802	>	{$ELSE}
4803	>	begin
4804	>	{$ENDIF}
4805	>	InternalSetFieldData(Field, Buffer);
4806	>	end;
4807	>
4808	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
4809	>	NativeFormat: Boolean);
4810	>	begin
4811	>	if (not NativeFormat) and (Field.DataType = ftBCD) then
4812	>	InternalSetfieldData(Field, Buffer)
4813	>	else
4814	>	inherited SetFieldData(Field, buffer, NativeFormat);
4815	>	end;
4816	>
4817	>	{ TIBDataSetUpdateObject }
4818	>
4819	>	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
4820	>	begin
4821	>	inherited Create(AOwner);
4822	>	FRefreshSQL := TStringList.Create;
4823	>	end;
4824	>
4825	>	destructor TIBDataSetUpdateObject.Destroy;
4826	>	begin
4827	>	FRefreshSQL.Free;
4828	>	inherited Destroy;
4829	>	end;
4830	>
4831	>	procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings);
4832	>	begin
4833	>	FRefreshSQL.Assign(Value);
4834	>	end;
4835	>
4836	>	procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
4837	>	begin
4838	>	if not Assigned(DataSet) then Exit;
4839	>	DataSet.SetInternalSQLParams(Query, buff);
4840	>	end;
4841	>
4842	>	function TIBDSBlobStream.GetSize: Int64;
4843	>	begin
4844	>	Result := FBlobStream.BlobSize;
4845	>	end;
4846	>
4847	>	{ TIBDSBlobStream }
4848	>	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
4849	>	Mode: TBlobStreamMode);
4850	>	begin
4851	>	FField := AField;
4852	>	FBlobStream := ABlobStream;
4853	>	FBlobStream.Seek(0, soFromBeginning);
4854	>	if (Mode = bmWrite) then
4855	>	begin
4856	>	FBlobStream.Truncate;
4857	>	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4858	>	TBlobField(FField).Modified := true;
4859	>	FHasWritten := true;
4860	>	end;
4861	>	end;
4862	>
4863	>	destructor TIBDSBlobStream.Destroy;
4864	>	begin
4865	>	if FHasWritten then
4866	>	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4867	>	inherited Destroy;
4868	>	end;
4869	>
4870	>	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
4871	>	begin
4872	>	result := FBlobStream.Read(Buffer, Count);
4873	>	end;
4874	>
4875	>	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
4876	>	begin
4877	>	result := FBlobStream.Seek(Offset, Origin);
4878	>	end;
4879	>
4880	>	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
4881	>	begin
4882	>	FBlobStream.SetSize(NewSize);
4883	>	end;
4884	>
4885	>	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
4886	>	begin
4887	>	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
4888	>	IBError(ibxeNotEditing, [nil]);
4889	>	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4890	>	TBlobField(FField).Modified := true;
4891	>	result := FBlobStream.Write(Buffer, Count);
4892	>	FHasWritten := true;
4893	>	{  TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4894	>	Removed as this caused a seek to beginning of the blob stream thus corrupting
4895	>	the blob stream. Moved to the destructor i.e. called after blob written}
4896	>	end;
4897	>
4898	>	{ TIBGenerator }
4899	>
4900	>	procedure TIBGenerator.SetIncrement(const AValue: integer);
4901	>	begin
4902	>	if AValue < 0 then
4903	>	raise Exception.Create('A Generator Increment cannot be negative');
4904	>	FIncrement := AValue
4905	>	end;
4906	>
4907	>	function TIBGenerator.GetNextValue(ADatabase: TIBDatabase;
4908	>	ATransaction: TIBTransaction): integer;
4909	>	begin
4910	>	with TIBSQL.Create(nil) do
4911	>	try
4912	>	Database := ADatabase;
4913	>	Transaction := ATransaction;
4914	>	if not assigned(Database) then
4915	>	IBError(ibxeCannotSetDatabase,[]);
4916	>	if not assigned(Transaction) then
4917	>	IBError(ibxeCannotSetTransaction,[]);
4918	>	with Transaction do
4919	>	if not InTransaction then StartTransaction;
4920	>	SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]);
4921	>	Prepare;
4922	>	ExecQuery;
4923	>	try
4924	>	Result := FieldByName('ID').AsInteger
4925	>	finally
4926	>	Close
4927	>	end;
4928	>	finally
4929	>	Free
4930	>	end;
4931	>	end;
4932	>
4933	>	constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
4934	>	begin
4935	>	FOwner := Owner;
4936	>	FIncrement := 1;
4937	>	end;
4938	>
4939	>
4940	>	procedure TIBGenerator.Apply;
4941	>	begin
4942	>	if (FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then
4943	>	Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction);
4944	>	end;
4945	>
4946	>
4947	>	end.

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