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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 41 by tony, Sat Jul 16 12:25:48 2016 UTC

#	Line 1 | Line 1
1	<	{************************************************************************}
2	<	{                                                                        }
3	<	{       Borland Delphi Visual Component Library                          }
4	<	{       InterBase Express core components                                }
5	<	{                                                                        }
6	<	{       Copyright (c) 1998-2000 Inprise Corporation                      }
7	<	{                                                                        }
8	<	{    InterBase Express is based in part on the product                   }
9	<	{    Free IB Components, written by Gregory H. Deatz for                 }
10	<	{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
11	<	{    Free IB Components is used under license.                           }
12	<	{                                                                        }
13	<	{    The contents of this file are subject to the InterBase              }
14	<	{    Public License Version 1.0 (the "License"); you may not             }
15	<	{    use this file except in compliance with the License. You            }
16	<	{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	<	{    Software distributed under the License is distributed on            }
18	<	{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
19	<	{    express or implied. See the License for the specific language       }
20	<	{    governing rights and limitations under the License.                 }
21	<	{    The Original Code was created by InterBase Software Corporation     }
22	<	{       and its successors.                                              }
23	<	{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
24	<	{       Corporation. All Rights Reserved.                                }
25	<	{    Contributor(s): Jeff Overcash                                       }
26	<	{                                                                        }
27	<	{    IBX For Lazarus (Firebird Express)                                  }
28	<	{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	<	{    Portions created by MWA Software are copyright McCallum Whyman      }
30	<	{    Associates Ltd 2011                                                 }
31	<	{                                                                        }
32	<	{************************************************************************}
33	<
34	<	unit IBCustomDataSet;
35	<
36	<	{$R-}
37	<
38	<	{$Mode Delphi}
39	<
40	<	{$IFDEF DELPHI}
41	<	{$DEFINE TDBDFIELD_IS_BCD}
42	<	{$ENDIF}
43	<
44	<	interface
45	<
46	<	uses
47	<	{$IFDEF WINDOWS }
48	<	Windows,
49	<	{$ELSE}
50	<	unix,
51	<	{$ENDIF}
52	<	SysUtils, Classes, Forms, Controls, IBDatabase,
53	<	IBExternals, IB, IBHeader,  IBSQL, Db,
54	<	IBUtils, IBBlob, IBSQLParser;
55	<
56	<	const
57	<	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
58	<	UniCache           =  2;     { Uni-directional cache is 2 records big }
59	<
60	<	type
61	<	TIBCustomDataSet = class;
62	<	TIBDataSet = class;
63	<
64	<	{ TIBDataSetUpdateObject }
65	<
66	<	TIBDataSetUpdateObject = class(TComponent)
67	<	private
68	<	FRefreshSQL: TStrings;
69	<	procedure SetRefreshSQL(value: TStrings);
70	<	protected
71	<	function GetDataSet: TIBCustomDataSet; virtual; abstract;
72	<	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
73	<	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
74	<	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
75	<	procedure InternalSetParams(Query: TIBSQL; buff: PChar);
76	<	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
77	<	public
78	<	constructor Create(AOwner: TComponent); override;
79	<	destructor Destroy; override;
80	<	published
81	<	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
82	<	end;
83	<
84	<	TBlobDataArray = array[0..0] of TIBBlobStream;
85	<	PBlobDataArray = ^TBlobDataArray;
86	<
87	<	{ TIBCustomDataSet }
88	<	TFieldData = record
89	<	fdDataType: Short;
90	<	fdDataScale: Short;
91	<	fdNullable: Boolean;
92	<	fdIsNull: Boolean;
93	<	fdDataSize: Short;
94	<	fdDataLength: Short;
95	<	fdDataOfs: Integer;
96	<	end;
97	<	PFieldData = ^TFieldData;
98	<
99	<	TCachedUpdateStatus = (
100	<	cusUnmodified, cusModified, cusInserted,
101	<	cusDeleted, cusUninserted
102	<	);
103	<	TIBDBKey = record
104	<	DBKey: array[0..7] of Byte;
105	<	end;
106	<	PIBDBKey = ^TIBDBKey;
107	<
108	<	TRecordData = record
109	<	rdBookmarkFlag: TBookmarkFlag;
110	<	rdFieldCount: Short;
111	<	rdRecordNumber: Integer;
112	<	rdCachedUpdateStatus: TCachedUpdateStatus;
113	<	rdUpdateStatus: TUpdateStatus;
114	<	rdSavedOffset: DWORD;
115	<	rdDBKey: TIBDBKey;
116	<	rdFields: array[1..1] of TFieldData;
117	<	end;
118	<	PRecordData = ^TRecordData;
119	<
120	<	{ TIBStringField allows us to have strings longer than 8196 }
121	<
122	<	TIBStringField = class(TStringField)
123	<	public
124	<	constructor create(AOwner: TComponent); override;
125	<	class procedure CheckTypeSize(Value: Integer); override;
126	<	function GetAsString: string; override;
127	<	function GetAsVariant: Variant; override;
128	<	function GetValue(var Value: string): Boolean;
129	<	procedure SetAsString(const Value: string); override;
130	<	end;
131	<
132	<	{ TIBBCDField }
133	<	{  Actually, there is no BCD involved in this type,
134	<	instead it deals with currency types.
135	<	In IB, this is an encapsulation of Numeric (x, y)
136	<	where x < 18 and y <= 4.
137	<	Note: y > 4 will default to Floats
138	<	}
139	<	TIBBCDField = class(TBCDField)
140	<	protected
141	<	class procedure CheckTypeSize(Value: Integer); override;
142	<	function GetAsCurrency: Currency; override;
143	<	function GetAsString: string; override;
144	<	function GetAsVariant: Variant; override;
145	<	function GetDataSize: Integer; override;
146	<	public
147	<	constructor Create(AOwner: TComponent); override;
148	<	published
149	<	property Size default 8;
150	<	end;
151	<
152	<	TIBDataLink = class(TDetailDataLink)
153	<	private
154	<	FDataSet: TIBCustomDataSet;
155	<	protected
156	<	procedure ActiveChanged; override;
157	<	procedure RecordChanged(Field: TField); override;
158	<	function GetDetailDataSet: TDataSet; override;
159	<	procedure CheckBrowseMode; override;
160	<	public
161	<	constructor Create(ADataSet: TIBCustomDataSet);
162	<	destructor Destroy; override;
163	<	end;
164	<
165	<	TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord);
166	<
167	<	{ TIBGenerator }
168	<
169	<	TIBGenerator = class(TPersistent)
170	<	private
171	<	FOwner: TIBCustomDataSet;
172	<	FApplyOnEvent: TIBGeneratorApplyOnEvent;
173	<	FFieldName: string;
174	<	FGeneratorName: string;
175	<	FIncrement: integer;
176	<	procedure SetIncrement(const AValue: integer);
177	<	protected
178	<	function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer;
179	<	public
180	<	constructor Create(Owner: TIBCustomDataSet);
181	<	procedure Apply;
182	<	property Owner: TIBCustomDataSet read FOwner;
183	<	published
184	<	property Generator: string read FGeneratorName write FGeneratorName;
185	<	property Field: string read FFieldName write FFieldName;
186	<	property Increment: integer read FIncrement write SetIncrement default 1;
187	<	property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
188	<	end;
189	<
190	<	{ TIBCustomDataSet }
191	<	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
192	<
193	<	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
194	<	UpdateKind: TUpdateKind; var UpdateAction: TIBUpdateAction)
195	<	of object;
196	<	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
197	<	var UpdateAction: TIBUpdateAction) of object;
198	<
199	<	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
200	<
201	<	TIBCustomDataSet = class(TDataset)
202	<	private
203	<	FGenerateParamNames: Boolean;
204	<	FGeneratorField: TIBGenerator;
205	<	FNeedsRefresh: Boolean;
206	<	FForcedRefresh: Boolean;
207	<	FDidActivate: Boolean;
208	<	FIBLoaded: Boolean;
209	<	FBase: TIBBase;
210	<	FBlobCacheOffset: Integer;
211	<	FBlobStreamList: TList;
212	<	FBufferChunks: Integer;
213	<	FBufferCache,
214	<	FOldBufferCache: PChar;
215	<	FBufferChunkSize,
216	<	FCacheSize,
217	<	FOldCacheSize: Integer;
218	<	FFilterBuffer: PChar;
219	<	FBPos,
220	<	FOBPos,
221	<	FBEnd,
222	<	FOBEnd: DWord;
223	<	FCachedUpdates: Boolean;
224	<	FCalcFieldsOffset: Integer;
225	<	FCurrentRecord: Long;
226	<	FDeletedRecords: Long;
227	<	FModelBuffer,
228	<	FOldBuffer: PChar;
229	<	FOpen: Boolean;
230	<	FInternalPrepared: Boolean;
231	<	FQDelete,
232	<	FQInsert,
233	<	FQRefresh,
234	<	FQSelect,
235	<	FQModify: TIBSQL;
236	<	FRecordBufferSize: Integer;
237	<	FRecordCount: Integer;
238	<	FRecordSize: Integer;
239	<	FUniDirectional: Boolean;
240	<	FUpdateMode: TUpdateMode;
241	<	FUpdateObject: TIBDataSetUpdateObject;
242	<	FParamCheck: Boolean;
243	<	FUpdatesPending: Boolean;
244	<	FUpdateRecordTypes: TIBUpdateRecordTypes;
245	<	FMappedFieldPosition: array of Integer;
246	<	FDataLink: TIBDataLink;
247	<
248	<	FBeforeDatabaseDisconnect,
249	<	FAfterDatabaseDisconnect,
250	<	FDatabaseFree: TNotifyEvent;
251	<	FOnUpdateError: TIBUpdateErrorEvent;
252	<	FOnUpdateRecord: TIBUpdateRecordEvent;
253	<	FBeforeTransactionEnd,
254	<	FAfterTransactionEnd,
255	<	FTransactionFree: TNotifyEvent;
256	<	FAliasNameMap: array of string;
257	<	FAliasNameList: array of string;
258	<	FBaseSQLSelect: TStrings;
259	<	FParser: TSelectSQLParser;
260	<	function GetSelectStmtHandle: TISC_STMT_HANDLE;
261	<	procedure SetUpdateMode(const Value: TUpdateMode);
262	<	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
263	<
264	<	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
265	<	procedure AdjustRecordOnInsert(Buffer: Pointer);
266	<	function CanEdit: Boolean;
267	<	function CanInsert: Boolean;
268	<	function CanDelete: Boolean;
269	<	function CanRefresh: Boolean;
270	<	procedure CheckEditState;
271	<	procedure ClearBlobCache;
272	<	procedure CopyRecordBuffer(Source, Dest: Pointer);
273	<	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
274	<	procedure DoAfterDatabaseDisconnect(Sender: TObject);
275	<	procedure DoDatabaseFree(Sender: TObject);
276	<	procedure DoBeforeTransactionEnd(Sender: TObject);
277	<	procedure DoAfterTransactionEnd(Sender: TObject);
278	<	procedure DoTransactionFree(Sender: TObject);
279	<	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
280	<	Buffer: PChar);
281	<	function GetDatabase: TIBDatabase;
282	<	function GetDBHandle: PISC_DB_HANDLE;
283	<	function GetDeleteSQL: TStrings;
284	<	function GetInsertSQL: TStrings;
285	<	function GetSQLParams: TIBXSQLDA;
286	<	function GetRefreshSQL: TStrings;
287	<	function GetSelectSQL: TStrings;
288	<	function GetStatementType: TIBSQLTypes;
289	<	function GetModifySQL: TStrings;
290	<	function GetTransaction: TIBTransaction;
291	<	function GetTRHandle: PISC_TR_HANDLE;
292	<	function GetParser: TSelectSQLParser;
293	<	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
294	<	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
295	<	Options: TLocateOptions): Boolean; virtual;
296	<	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
297	<	procedure InternalRevertRecord(RecordNumber: Integer); virtual;
298	<	function IsVisible(Buffer: PChar): Boolean;
299	<	procedure SaveOldBuffer(Buffer: PChar);
300	<	procedure SetBufferChunks(Value: Integer);
301	<	procedure SetDatabase(Value: TIBDatabase);
302	<	procedure SetDeleteSQL(Value: TStrings);
303	<	procedure SetInsertSQL(Value: TStrings);
304	<	procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
305	<	procedure SetRefreshSQL(Value: TStrings);
306	<	procedure SetSelectSQL(Value: TStrings);
307	<	procedure SetModifySQL(Value: TStrings);
308	<	procedure SetTransaction(Value: TIBTransaction);
309	<	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
310	<	procedure SetUniDirectional(Value: Boolean);
311	<	procedure RefreshParams;
312	<	procedure SQLChanging(Sender: TObject); virtual;
313	<	function AdjustPosition(FCache: PChar; Offset: DWORD;
314	<	Origin: Integer): DWORD;
315	<	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
316	<	Buffer: PChar);
317	<	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
318	<	ReadOldBuffer: Boolean);
319	<	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
320	<	Buffer: PChar);
321	<	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
322	<	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
323	<	DoCheck: Boolean): TGetResult; virtual;
324	<
325	<	protected
326	<	procedure ActivateConnection;
327	<	function ActivateTransaction: Boolean;
328	<	procedure DeactivateTransaction;
329	<	procedure CheckDatasetClosed;
330	<	procedure CheckDatasetOpen;
331	<	function CreateParser: TSelectSQLParser; virtual;
332	<	procedure FieldDefsFromQuery(SourceQuery: TIBSQL);
333	<	function GetActiveBuf: PChar;
334	<	procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
335	<	procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
336	<	procedure InternalPrepare; virtual;
337	<	procedure InternalUnPrepare; virtual;
338	<	procedure InternalExecQuery; virtual;
339	<	procedure InternalRefreshRow; virtual;
340	<	procedure InternalSetParamsFromCursor; virtual;
341	<	procedure CheckNotUniDirectional;
342	<
343	<	(*    { IProviderSupport }
344	<	procedure PSEndTransaction(Commit: Boolean); override;
345	<	function PSExecuteStatement(const ASQL: string; AParams: TParams;
346	<	ResultSet: Pointer = nil): Integer; override;
347	<	function PsGetTableName: string; override;
348	<	function PSGetQuoteChar: string; override;
349	<	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
350	<	function PSInTransaction: Boolean; override;
351	<	function PSIsSQLBased: Boolean; override;
352	<	function PSIsSQLSupported: Boolean; override;
353	<	procedure PSStartTransaction; override;
354	<	procedure PSReset; override;
355	<	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
356	<	*)
357	<	{ TDataSet support }
358	<	procedure InternalInsert; override;
359	<	procedure InitRecord(Buffer: PChar); override;
360	<	procedure Disconnect; virtual;
361	<	function ConstraintsStored: Boolean;
362	<	procedure ClearCalcFields(Buffer: PChar); override;
363	<	function AllocRecordBuffer: PChar; override;
364	<	procedure DoBeforeDelete; override;
365	<	procedure DoBeforeEdit; override;
366	<	procedure DoBeforeInsert; override;
367	<	procedure DoAfterInsert; override;
368	<	procedure DoBeforeOpen; override;
369	<	procedure DoBeforePost; override;
370	<	procedure FreeRecordBuffer(var Buffer: PChar); override;
371	<	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
372	<	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
373	<	function GetCanModify: Boolean; override;
374	<	function GetDataSource: TDataSource; override;
375	<	function GetDBAliasName(FieldNo: integer): string;
376	<	function GetFieldDefFromAlias(aliasName: string): TFieldDef;
377	<	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
378	<	function GetRecNo: Integer; override;
379	<	function GetRecord(Buffer: PChar; GetMode: TGetMode;
380	<	DoCheck: Boolean): TGetResult; override;
381	<	function GetRecordCount: Integer; override;
382	<	function GetRecordSize: Word; override;
383	<	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
384	<	procedure InternalCancel; override;
385	<	procedure InternalClose; override;
386	<	procedure InternalDelete; override;
387	<	procedure InternalFirst; override;
388	<	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
389	<	procedure InternalGotoBookmark(Bookmark: Pointer); override;
390	<	procedure InternalHandleException; override;
391	<	procedure InternalInitFieldDefs; override;
392	<	procedure InternalInitRecord(Buffer: PChar); override;
393	<	procedure InternalLast; override;
394	<	procedure InternalOpen; override;
395	<	procedure InternalPost; override;
396	<	procedure InternalRefresh; override;
397	<	procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
398	<	procedure InternalSetToRecord(Buffer: PChar); override;
399	<	function IsCursorOpen: Boolean; override;
400	<	procedure Loaded; override;
401	<	procedure ReQuery;
402	<	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
403	<	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
404	<	procedure SetCachedUpdates(Value: Boolean);
405	<	procedure SetDataSource(Value: TDataSource);
406	<	procedure SetGenerateParamNames(AValue: Boolean); virtual;
407	<	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
408	<	procedure SetFieldData(Field : TField; Buffer : Pointer;
409	<	NativeFormat : Boolean); overload; override;
410	<	procedure SetRecNo(Value: Integer); override;
411	<
412	<	protected
413	<	{Likely to be made public by descendant classes}
414	<	property SQLParams: TIBXSQLDA read GetSQLParams;
415	<	property Params: TIBXSQLDA read GetSQLParams;
416	<	property InternalPrepared: Boolean read FInternalPrepared;
417	<	property QDelete: TIBSQL read FQDelete;
418	<	property QInsert: TIBSQL read FQInsert;
419	<	property QRefresh: TIBSQL read FQRefresh;
420	<	property QSelect: TIBSQL read FQSelect;
421	<	property QModify: TIBSQL read FQModify;
422	<	property StatementType: TIBSQLTypes read GetStatementType;
423	<	property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle;
424	<
425	<	{Likely to be made published by descendant classes}
426	<	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
427	<	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
428	<	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
429	<	property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
430	<	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
431	<	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
432	<	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
433	<	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
434	<	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
435	<	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
436	<	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
437	<	property Parser: TSelectSQLParser read GetParser;
438	<	property BaseSQLSelect: TStrings read FBaseSQLSelect;
439	<
440	<	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
441	<	write FBeforeDatabaseDisconnect;
442	<	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
443	<	write FAfterDatabaseDisconnect;
444	<	property DatabaseFree: TNotifyEvent read FDatabaseFree
445	<	write FDatabaseFree;
446	<	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
447	<	write FBeforeTransactionEnd;
448	<	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
449	<	write FAfterTransactionEnd;
450	<	property TransactionFree: TNotifyEvent read FTransactionFree
451	<	write FTransactionFree;
452	<
453	<	public
454	<	constructor Create(AOwner: TComponent); override;
455	<	destructor Destroy; override;
456	<	procedure ApplyUpdates;
457	<	function CachedUpdateStatus: TCachedUpdateStatus;
458	<	procedure CancelUpdates;
459	<	function GetFieldPosition(AliasName: string): integer;
460	<	procedure FetchAll;
461	<	function LocateNext(const KeyFields: string; const KeyValues: Variant;
462	<	Options: TLocateOptions): Boolean;
463	<	procedure RecordModified(Value: Boolean);
464	<	procedure RevertRecord;
465	<	procedure Undelete;
466	<	procedure ResetParser;
467	<	function HasParser: boolean;
468	<
469	<	{ TDataSet support methods }
470	<	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
471	<	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
472	<	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
473	<	function GetCurrentRecord(Buffer: PChar): Boolean; override;
474	<	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
475	<	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
476	<	function GetFieldData(Field : TField; Buffer : Pointer;
477	<	NativeFormat : Boolean) : Boolean; overload; override;
478	<	property GenerateParamNames: Boolean read FGenerateParamNames write SetGenerateParamNames;
479	<	function Locate(const KeyFields: string; const KeyValues: Variant;
480	<	Options: TLocateOptions): Boolean; override;
481	<	function Lookup(const KeyFields: string; const KeyValues: Variant;
482	<	const ResultFields: string): Variant; override;
483	<	function UpdateStatus: TUpdateStatus; override;
484	<	function IsSequenced: Boolean; override;
485	<	function ParamByName(ParamName: String): TIBXSQLVAR;
486	<	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
487	<	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
488	<	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
489	<	property UpdatesPending: Boolean read FUpdatesPending;
490	<	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
491	<	write SetUpdateRecordTypes;
492	<
493	<	published
494	<	property Database: TIBDatabase read GetDatabase write SetDatabase;
495	<	property Transaction: TIBTransaction read GetTransaction
496	<	write SetTransaction;
497	<	property ForcedRefresh: Boolean read FForcedRefresh
498	<	write FForcedRefresh default False;
499	<	property AutoCalcFields;
500	<
501	<	property AfterCancel;
502	<	property AfterClose;
503	<	property AfterDelete;
504	<	property AfterEdit;
505	<	property AfterInsert;
506	<	property AfterOpen;
507	<	property AfterPost;
508	<	property AfterRefresh;
509	<	property AfterScroll;
510	<	property BeforeCancel;
511	<	property BeforeClose;
512	<	property BeforeDelete;
513	<	property BeforeEdit;
514	<	property BeforeInsert;
515	<	property BeforeOpen;
516	<	property BeforePost;
517	<	property BeforeRefresh;
518	<	property BeforeScroll;
519	<	property OnCalcFields;
520	<	property OnDeleteError;
521	<	property OnEditError;
522	<	property OnNewRecord;
523	<	property OnPostError;
524	<	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
525	<	write FOnUpdateError;
526	<	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
527	<	write FOnUpdateRecord;
528	<	end;
529	<
530	<	TIBParserDataSet = class(TIBCustomDataSet)
531	<	public
532	<	property Parser;
533	<	end;
534	<
535	<	TIBDataSet = class(TIBParserDataSet)
536	<	private
537	<	function GetPrepared: Boolean;
538	<
539	<	protected
540	<	procedure SetFiltered(Value: Boolean); override;
541	<	procedure InternalOpen; override;
542	<
543	<	public
544	<	procedure Prepare;
545	<	procedure UnPrepare;
546	<	procedure BatchInput(InputObject: TIBBatchInput);
547	<	procedure BatchOutput(OutputObject: TIBBatchOutput);
548	<	procedure ExecSQL;
549	<
550	<	public
551	<	property Params;
552	<	property Prepared : Boolean read GetPrepared;
553	<	property QDelete;
554	<	property QInsert;
555	<	property QRefresh;
556	<	property QSelect;
557	<	property QModify;
558	<	property StatementType;
559	<	property SelectStmtHandle;
560	<	property BaseSQLSelect;
561	<
562	<	published
563	<	{ TIBCustomDataSet }
564	<	property BufferChunks;
565	<	property CachedUpdates;
566	<	property DeleteSQL;
567	<	property InsertSQL;
568	<	property RefreshSQL;
569	<	property SelectSQL;
570	<	property ModifySQL;
571	<	property GeneratorField;
572	<	property GenerateParamNames;
573	<	property ParamCheck;
574	<	property UniDirectional;
575	<	property Filtered;
576	<
577	<	property BeforeDatabaseDisconnect;
578	<	property AfterDatabaseDisconnect;
579	<	property DatabaseFree;
580	<	property BeforeTransactionEnd;
581	<	property AfterTransactionEnd;
582	<	property TransactionFree;
583	<
584	<	{ TIBDataSet }
585	<	property Active;
586	<	property AutoCalcFields;
587	<	property DataSource read GetDataSource write SetDataSource;
588	<
589	<	property AfterCancel;
590	<	property AfterClose;
591	<	property AfterDelete;
592	<	property AfterEdit;
593	<	property AfterInsert;
594	<	property AfterOpen;
595	<	property AfterPost;
596	<	property AfterScroll;
597	<	property BeforeCancel;
598	<	property BeforeClose;
599	<	property BeforeDelete;
600	<	property BeforeEdit;
601	<	property BeforeInsert;
602	<	property BeforeOpen;
603	<	property BeforePost;
604	<	property BeforeScroll;
605	<	property OnCalcFields;
606	<	property OnDeleteError;
607	<	property OnEditError;
608	<	property OnFilterRecord;
609	<	property OnNewRecord;
610	<	property OnPostError;
611	<	end;
612	<
613	<	{ TIBDSBlobStream }
614	<	TIBDSBlobStream = class(TStream)
615	<	protected
616	<	FField: TField;
617	<	FBlobStream: TIBBlobStream;
618	<	public
619	<	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
620	<	Mode: TBlobStreamMode);
621	<	function Read(var Buffer; Count: Longint): Longint; override;
622	<	function Seek(Offset: Longint; Origin: Word): Longint; override;
623	<	procedure SetSize(NewSize: Longint); override;
624	<	function Write(const Buffer; Count: Longint): Longint; override;
625	<	end;
626	<
627	<	const
628	<	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
629	<	nil,                { ftUnknown }
630	<	TIBStringField,     { ftString }
631	<	TSmallintField,     { ftSmallint }
632	<	TIntegerField,      { ftInteger }
633	<	TWordField,         { ftWord }
634	<	TBooleanField,      { ftBoolean }
635	<	TFloatField,        { ftFloat }
636	<	TCurrencyField,     { ftCurrency }
637	<	TIBBCDField,        { ftBCD }
638	<	TDateField,         { ftDate }
639	<	TTimeField,         { ftTime }
640	<	TDateTimeField,     { ftDateTime }
641	<	TBytesField,        { ftBytes }
642	<	TVarBytesField,     { ftVarBytes }
643	<	TAutoIncField,      { ftAutoInc }
644	<	TBlobField,         { ftBlob }
645	<	TMemoField,         { ftMemo }
646	<	TGraphicField,      { ftGraphic }
647	<	TBlobField,         { ftFmtMemo }
648	<	TBlobField,         { ftParadoxOle }
649	<	TBlobField,         { ftDBaseOle }
650	<	TBlobField,         { ftTypedBinary }
651	<	nil,                { ftCursor }
652	<	TStringField,       { ftFixedChar }
653	<	TWideStringField,    { ftWideString }
654	<	TLargeIntField,     { ftLargeInt }
655	<	nil,          { ftADT }
656	<	nil,        { ftArray }
657	<	nil,    { ftReference }
658	<	nil,     { ftDataSet }
659	<	TBlobField,         { ftOraBlob }
660	<	TMemoField,         { ftOraClob }
661	<	TVariantField,      { ftVariant }
662	<	nil,    { ftInterface }
663	<	nil,     { ftIDispatch }
664	<	TGuidField,        { ftGuid }
665	<	TDateTimeField,    {ftTimestamp}
666	<	TIBBCDField,       {ftFMTBcd}
667	<	nil,  {ftFixedWideChar}
668	<	TWideMemoField);   {ftWideMemo}
669	<	(*
670	<	TADTField,          { ftADT }
671	<	TArrayField,        { ftArray }
672	<	TReferenceField,    { ftReference }
673	<	TDataSetField,     { ftDataSet }
674	<	TBlobField,         { ftOraBlob }
675	<	TMemoField,         { ftOraClob }
676	<	TVariantField,      { ftVariant }
677	<	TInterfaceField,    { ftInterface }
678	<	TIDispatchField,     { ftIDispatch }
679	<	TGuidField);        { ftGuid } *)
680	<	(*var
681	<	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
682	<
683	<	implementation
684	<
685	<	uses IBIntf, Variants, FmtBCD;
686	<
687	<	const FILE_BEGIN = 0;
688	<	FILE_CURRENT = 1;
689	<	FILE_END = 2;
690	<
691	<	type
692	<
693	<	TFieldNode = class(TObject)
694	<	protected
695	<	FieldName : String;
696	<	COMPUTED_BLR : Boolean;
697	<	DEFAULT_VALUE : boolean;
698	<	NextField : TFieldNode;
699	<	end;
700	<
701	<	TRelationNode = class(TObject)
702	<	protected
703	<	RelationName : String;
704	<	FieldNodes : TFieldNode;
705	<	NextRelation : TRelationNode;
706	<	end;
707	<
708	<
709	<	{ TIBStringField}
710	<
711	<	constructor TIBStringField.Create(AOwner: TComponent);
712	<	begin
713	<	inherited Create(AOwner);
714	<	end;
715	<
716	<	class procedure TIBStringField.CheckTypeSize(Value: Integer);
717	<	begin
718	<	{ don't check string size. all sizes valid }
719	<	end;
720	<
721	<	function TIBStringField.GetAsString: string;
722	<	begin
723	<	if not GetValue(Result) then Result := '';
724	<	end;
725	<
726	<	function TIBStringField.GetAsVariant: Variant;
727	<	var
728	<	S: string;
729	<	begin
730	<	if GetValue(S) then Result := S else Result := Null;
731	<	end;
732	<
733	<	function TIBStringField.GetValue(var Value: string): Boolean;
734	<	var
735	<	Buffer: PChar;
736	<	begin
737	<	Buffer := nil;
738	<	IBAlloc(Buffer, 0, Size + 1);
739	<	try
740	<	Result := GetData(Buffer);
741	<	if Result then
742	<	begin
743	<	Value := string(Buffer);
744	<	if Transliterate and (Value <> '') then
745	<	DataSet.Translate(PChar(Value), PChar(Value), False);
746	<	end
747	<	finally
748	<	FreeMem(Buffer);
749	<	end;
750	<	end;
751	<
752	<	procedure TIBStringField.SetAsString(const Value: string);
753	<	var
754	<	Buffer: PChar;
755	<	begin
756	<	Buffer := nil;
757	<	IBAlloc(Buffer, 0, Size + 1);
758	<	try
759	<	StrLCopy(Buffer, PChar(Value), Size);
760	<	if Transliterate then
761	<	DataSet.Translate(Buffer, Buffer, True);
762	<	SetData(Buffer);
763	<	finally
764	<	FreeMem(Buffer);
765	<	end;
766	<	end;
767	<
768	<	{ TIBBCDField }
769	<
770	<	constructor TIBBCDField.Create(AOwner: TComponent);
771	<	begin
772	<	inherited Create(AOwner);
773	<	SetDataType(ftBCD);
774	<	Size := 8;
775	<	end;
776	<
777	<	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
778	<	begin
779	<	{ No need to check as the base type is currency, not BCD }
780	<	end;
781	<
782	<	function TIBBCDField.GetAsCurrency: Currency;
783	<	begin
784	<	if not GetValue(Result) then
785	<	Result := 0;
786	<	end;
787	<
788	<	function TIBBCDField.GetAsString: string;
789	<	var
790	<	C: System.Currency;
791	<	begin
792	<	if GetValue(C) then
793	<	Result := CurrToStr(C)
794	<	else
795	<	Result := '';
796	<	end;
797	<
798	<	function TIBBCDField.GetAsVariant: Variant;
799	<	var
800	<	C: System.Currency;
801	<	begin
802	<	if GetValue(C) then
803	<	Result := C
804	<	else
805	<	Result := Null;
806	<	end;
807	<
808	<	function TIBBCDField.GetDataSize: Integer;
809	<	begin
810	<	{$IFDEF TBCDFIELD_IS_BCD}
811	<	Result := 8;
812	<	{$ELSE}
813	<	Result := inherited GetDataSize
814	<	{$ENDIF}
815	<	end;
816	<
817	<	{ TIBDataLink }
818	<
819	<	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
820	<	begin
821	<	inherited Create;
822	<	FDataSet := ADataSet;
823	<	end;
824	<
825	<	destructor TIBDataLink.Destroy;
826	<	begin
827	<	FDataSet.FDataLink := nil;
828	<	inherited Destroy;
829	<	end;
830	<
831	<
832	<	procedure TIBDataLink.ActiveChanged;
833	<	begin
834	<	if FDataSet.Active then
835	<	FDataSet.RefreshParams;
836	<	end;
837	<
838	<
839	<	function TIBDataLink.GetDetailDataSet: TDataSet;
840	<	begin
841	<	Result := FDataSet;
842	<	end;
843	<
844	<	procedure TIBDataLink.RecordChanged(Field: TField);
845	<	begin
846	<	if (Field = nil) and FDataSet.Active then
847	<	FDataSet.RefreshParams;
848	<	end;
849	<
850	<	procedure TIBDataLink.CheckBrowseMode;
851	<	begin
852	<	if FDataSet.Active then
853	<	FDataSet.CheckBrowseMode;
854	<	end;
855	<
856	<	{ TIBCustomDataSet }
857	<
858	<	constructor TIBCustomDataSet.Create(AOwner: TComponent);
859	<	begin
860	<	inherited Create(AOwner);
861	<	FIBLoaded := False;
862	<	CheckIBLoaded;
863	<	FIBLoaded := True;
864	<	FBase := TIBBase.Create(Self);
865	<	FCurrentRecord := -1;
866	<	FDeletedRecords := 0;
867	<	FUniDirectional := False;
868	<	FBufferChunks := BufferCacheSize;
869	<	FBlobStreamList := TList.Create;
870	<	FGeneratorField := TIBGenerator.Create(self);
871	<	FDataLink := TIBDataLink.Create(Self);
872	<	FQDelete := TIBSQL.Create(Self);
873	<	FQDelete.OnSQLChanging := SQLChanging;
874	<	FQDelete.GoToFirstRecordOnExecute := False;
875	<	FQInsert := TIBSQL.Create(Self);
876	<	FQInsert.OnSQLChanging := SQLChanging;
877	<	FQInsert.GoToFirstRecordOnExecute := False;
878	<	FQRefresh := TIBSQL.Create(Self);
879	<	FQRefresh.OnSQLChanging := SQLChanging;
880	<	FQRefresh.GoToFirstRecordOnExecute := False;
881	<	FQSelect := TIBSQL.Create(Self);
882	<	FQSelect.OnSQLChanging := SQLChanging;
883	<	FQSelect.GoToFirstRecordOnExecute := False;
884	<	FQModify := TIBSQL.Create(Self);
885	<	FQModify.OnSQLChanging := SQLChanging;
886	<	FQModify.GoToFirstRecordOnExecute := False;
887	<	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
888	<	FParamCheck := True;
889	<	FGenerateParamNames := False;
890	<	FForcedRefresh := False;
891	<	{Bookmark Size is Integer for IBX}
892	<	BookmarkSize := SizeOf(Integer);
893	<	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
894	<	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
895	<	FBase.OnDatabaseFree := DoDatabaseFree;
896	<	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
897	<	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
898	<	FBase.OnTransactionFree := DoTransactionFree;
899	<	if AOwner is TIBDatabase then
900	<	Database := TIBDatabase(AOwner)
901	<	else
902	<	if AOwner is TIBTransaction then
903	<	Transaction := TIBTransaction(AOwner);
904	<	FBaseSQLSelect := TStringList.Create;
905	<	end;
906	<
907	<	destructor TIBCustomDataSet.Destroy;
908	<	begin
909	<	if Active then Active := false;
910	<	if FIBLoaded then
911	<	begin
912	<	if assigned(FGeneratorField) then FGeneratorField.Free;
913	<	FDataLink.Free;
914	<	FBase.Free;
915	<	ClearBlobCache;
916	<	FBlobStreamList.Free;
917	<	FreeMem(FBufferCache);
918	<	FBufferCache := nil;
919	<	FreeMem(FOldBufferCache);
920	<	FOldBufferCache := nil;
921	<	FCacheSize := 0;
922	<	FOldCacheSize := 0;
923	<	FMappedFieldPosition := nil;
924	<	end;
925	<	if assigned(FBaseSQLSelect) then FBaseSQLSelect.Free;
926	<	if assigned(FParser) then FParser.Free;
927	<	inherited Destroy;
928	<	end;
929	<
930	<	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
931	<	TGetResult;
932	<	begin
933	<	while not IsVisible(Buffer) do
934	<	begin
935	<	if GetMode = gmPrior then
936	<	begin
937	<	Dec(FCurrentRecord);
938	<	if FCurrentRecord = -1 then
939	<	begin
940	<	result := grBOF;
941	<	exit;
942	<	end;
943	<	ReadRecordCache(FCurrentRecord, Buffer, False);
944	<	end
945	<	else begin
946	<	Inc(FCurrentRecord);
947	<	if (FCurrentRecord = FRecordCount) then
948	<	begin
949	<	if (not FQSelect.EOF) and (FQSelect.Next <> nil) then
950	<	begin
951	<	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
952	<	Inc(FRecordCount);
953	<	end
954	<	else begin
955	<	result := grEOF;
956	<	exit;
957	<	end;
958	<	end
959	<	else
960	<	ReadRecordCache(FCurrentRecord, Buffer, False);
961	<	end;
962	<	end;
963	<	result := grOK;
964	<	end;
965	<
966	<	procedure TIBCustomDataSet.ApplyUpdates;
967	<	var
968	<	{$IF FPC_FULLVERSION >= 20700 }
969	<	CurBookmark: TBookmark;
970	<	{$ELSE}
971	<	CurBookmark: string;
972	<	{$ENDIF}
973	<	Buffer: PRecordData;
974	<	CurUpdateTypes: TIBUpdateRecordTypes;
975	<	UpdateAction: TIBUpdateAction;
976	<	UpdateKind: TUpdateKind;
977	<	bRecordsSkipped: Boolean;
978	<
979	<	procedure GetUpdateKind;
980	<	begin
981	<	case Buffer^.rdCachedUpdateStatus of
982	<	cusModified:
983	<	UpdateKind := ukModify;
984	<	cusInserted:
985	<	UpdateKind := ukInsert;
986	<	else
987	<	UpdateKind := ukDelete;
988	<	end;
989	<	end;
990	<
991	<	procedure ResetBufferUpdateStatus;
992	<	begin
993	<	case Buffer^.rdCachedUpdateStatus of
994	<	cusModified:
995	<	begin
996	<	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
997	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
998	<	end;
999	<	cusInserted:
1000	<	begin
1001	<	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1002	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1003	<	end;
1004	<	cusDeleted:
1005	<	begin
1006	<	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
1007	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1008	<	end;
1009	<	end;
1010	<	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
1011	<	end;
1012	<
1013	<	procedure UpdateUsingOnUpdateRecord;
1014	<	begin
1015	<	UpdateAction := uaFail;
1016	<	try
1017	<	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
1018	<	except
1019	<	on E: Exception do
1020	<	begin
1021	<	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1022	<	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1023	<	if UpdateAction = uaFail then
1024	<	raise;
1025	<	end;
1026	<	end;
1027	<	end;
1028	<
1029	<	procedure UpdateUsingUpdateObject;
1030	<	begin
1031	<	try
1032	<	FUpdateObject.Apply(UpdateKind,PChar(Buffer));
1033	<	ResetBufferUpdateStatus;
1034	<	except
1035	<	on E: Exception do
1036	<	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1037	<	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1038	<	end;
1039	<	end;
1040	<
1041	<	procedure UpdateUsingInternalquery;
1042	<	begin
1043	<	try
1044	<	case Buffer^.rdCachedUpdateStatus of
1045	<	cusModified:
1046	<	InternalPostRecord(FQModify, Buffer);
1047	<	cusInserted:
1048	<	InternalPostRecord(FQInsert, Buffer);
1049	<	cusDeleted:
1050	<	InternalDeleteRecord(FQDelete, Buffer);
1051	<	end;
1052	<	except
1053	<	on E: EIBError do begin
1054	<	UpdateAction := uaFail;
1055	<	if Assigned(FOnUpdateError) then
1056	<	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
1057	<	case UpdateAction of
1058	<	uaFail: raise;
1059	<	uaAbort: SysUtils.Abort;
1060	<	uaSkip: bRecordsSkipped := True;
1061	<	end;
1062	<	end;
1063	<	end;
1064	<	end;
1065	<
1066	<	begin
1067	<	if State in [dsEdit, dsInsert] then
1068	<	Post;
1069	<	FBase.CheckDatabase;
1070	<	FBase.CheckTransaction;
1071	<	DisableControls;
1072	<	CurBookmark := Bookmark;
1073	<	CurUpdateTypes := FUpdateRecordTypes;
1074	<	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1075	<	try
1076	<	First;
1077	<	bRecordsSkipped := False;
1078	<	while not EOF do
1079	<	begin
1080	<	Buffer := PRecordData(GetActiveBuf);
1081	<	GetUpdateKind;
1082	<	UpdateAction := uaApply;
1083	<	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
1084	<	begin
1085	<	if (Assigned(FOnUpdateRecord)) then
1086	<	UpdateUsingOnUpdateRecord
1087	<	else
1088	<	if Assigned(FUpdateObject) then
1089	<	UpdateUsingUpdateObject;
1090	<	case UpdateAction of
1091	<	uaFail:
1092	<	IBError(ibxeUserAbort, [nil]);
1093	<	uaAbort:
1094	<	SysUtils.Abort;
1095	<	uaApplied:
1096	<	ResetBufferUpdateStatus;
1097	<	uaSkip:
1098	<	bRecordsSkipped := True;
1099	<	uaRetry:
1100	<	Continue;
1101	<	end;
1102	<	end;
1103	<	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
1104	<	begin
1105	<	UpdateUsingInternalquery;
1106	<	UpdateAction := uaApplied;
1107	<	end;
1108	<	Next;
1109	<	end;
1110	<	FUpdatesPending := bRecordsSkipped;
1111	<	finally
1112	<	FUpdateRecordTypes := CurUpdateTypes;
1113	<	Bookmark := CurBookmark;
1114	<	EnableControls;
1115	<	end;
1116	<	end;
1117	<
1118	<	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1119	<	begin
1120	<	FQSelect.BatchInput(InputObject);
1121	<	end;
1122	<
1123	<	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1124	<	var
1125	<	Qry: TIBSQL;
1126	<	begin
1127	<	Qry := TIBSQL.Create(Self);
1128	<	try
1129	<	Qry.Database := FBase.Database;
1130	<	Qry.Transaction := FBase.Transaction;
1131	<	Qry.SQL.Assign(FQSelect.SQL);
1132	<	Qry.BatchOutput(OutputObject);
1133	<	finally
1134	<	Qry.Free;
1135	<	end;
1136	<	end;
1137	<
1138	<	procedure TIBCustomDataSet.CancelUpdates;
1139	<	var
1140	<	CurUpdateTypes: TIBUpdateRecordTypes;
1141	<	begin
1142	<	if State in [dsEdit, dsInsert] then
1143	<	Post;
1144	<	if FCachedUpdates and FUpdatesPending then
1145	<	begin
1146	<	DisableControls;
1147	<	CurUpdateTypes := UpdateRecordTypes;
1148	<	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1149	<	try
1150	<	First;
1151	<	while not EOF do
1152	<	begin
1153	<	if UpdateStatus = usInserted then
1154	<	RevertRecord
1155	<	else
1156	<	begin
1157	<	RevertRecord;
1158	<	Next;
1159	<	end;
1160	<	end;
1161	<	finally
1162	<	UpdateRecordTypes := CurUpdateTypes;
1163	<	First;
1164	<	FUpdatesPending := False;
1165	<	EnableControls;
1166	<	end;
1167	<	end;
1168	<	end;
1169	<
1170	<	function TIBCustomDataSet.GetFieldPosition(AliasName: string): integer;
1171	<	var i: integer;
1172	<	Prepared: boolean;
1173	<	begin
1174	<	Result := 0;
1175	<	Prepared := FInternalPrepared;
1176	<	if not Prepared then
1177	<	InternalPrepare;
1178	<	try
1179	<	for i := 0 to Length(FAliasNameList) - 1 do
1180	<	if FAliasNameList[i] = AliasName then
1181	<	begin
1182	<	Result := i + 1;
1183	<	Exit
1184	<	end;
1185	<	finally
1186	<	if not Prepared then
1187	<	InternalUnPrepare;
1188	<	end;
1189	<	end;
1190	<
1191	<	procedure TIBCustomDataSet.ActivateConnection;
1192	<	begin
1193	<	if not Assigned(Database) then
1194	<	IBError(ibxeDatabaseNotAssigned, [nil]);
1195	<	if not Assigned(Transaction) then
1196	<	IBError(ibxeTransactionNotAssigned, [nil]);
1197	<	if not Database.Connected then Database.Open;
1198	<	end;
1199	<
1200	<	function TIBCustomDataSet.ActivateTransaction: Boolean;
1201	<	begin
1202	<	Result := False;
1203	<	if not Assigned(Transaction) then
1204	<	IBError(ibxeTransactionNotAssigned, [nil]);
1205	<	if not Transaction.Active then
1206	<	begin
1207	<	Result := True;
1208	<	Transaction.StartTransaction;
1209	<	FDidActivate := True;
1210	<	end;
1211	<	end;
1212	<
1213	<	procedure TIBCustomDataSet.DeactivateTransaction;
1214	<	var
1215	<	i: Integer;
1216	<	begin
1217	<	if not Assigned(Transaction) then
1218	<	IBError(ibxeTransactionNotAssigned, [nil]);
1219	<	with Transaction do
1220	<	begin
1221	<	for i := 0 to SQLObjectCount - 1 do
1222	<	begin
1223	<	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1224	<	begin
1225	<	if TDataSet(SQLObjects[i].owner).Active then
1226	<	begin
1227	<	FDidActivate := False;
1228	<	exit;
1229	<	end;
1230	<	end;
1231	<	end;
1232	<	end;
1233	<	FInternalPrepared := False;
1234	<	if Transaction.InTransaction then
1235	<	Transaction.Commit;
1236	<	FDidActivate := False;
1237	<	end;
1238	<
1239	<	procedure TIBCustomDataSet.CheckDatasetClosed;
1240	<	begin
1241	<	if FOpen then
1242	<	IBError(ibxeDatasetOpen, [nil]);
1243	<	end;
1244	<
1245	<	procedure TIBCustomDataSet.CheckDatasetOpen;
1246	<	begin
1247	<	if not FOpen then
1248	<	IBError(ibxeDatasetClosed, [nil]);
1249	<	end;
1250	<
1251	<	function TIBCustomDataSet.CreateParser: TSelectSQLParser;
1252	<	begin
1253	<	Result := TSelectSQLParser.Create(self,FBaseSQLSelect);
1254	<	Result.OnSQLChanging := SQLChanging
1255	<	end;
1256	<
1257	<	procedure TIBCustomDataSet.CheckNotUniDirectional;
1258	<	begin
1259	<	if UniDirectional then
1260	<	IBError(ibxeDataSetUniDirectional, [nil]);
1261	<	end;
1262	<
1263	<	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1264	<	begin
1265	<	with PRecordData(Buffer)^ do
1266	<	if (State = dsInsert) and (not Modified) then
1267	<	begin
1268	<	rdRecordNumber := FRecordCount;
1269	<	FCurrentRecord := FRecordCount;
1270	<	end;
1271	<	end;
1272	<
1273	<	function TIBCustomDataSet.CanEdit: Boolean;
1274	<	var
1275	<	Buff: PRecordData;
1276	<	begin
1277	<	Buff := PRecordData(GetActiveBuf);
1278	<	result := (FQModify.SQL.Text <> '') or
1279	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1280	<	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1281	<	(FCachedUpdates));
1282	<	end;
1283	<
1284	<	function TIBCustomDataSet.CanInsert: Boolean;
1285	<	begin
1286	<	result := (FQInsert.SQL.Text <> '') or
1287	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1288	<	end;
1289	<
1290	<	function TIBCustomDataSet.CanDelete: Boolean;
1291	<	begin
1292	<	if (FQDelete.SQL.Text <> '') or
1293	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1294	<	result := True
1295	<	else
1296	<	result := False;
1297	<	end;
1298	<
1299	<	function TIBCustomDataSet.CanRefresh: Boolean;
1300	<	begin
1301	<	result := (FQRefresh.SQL.Text <> '') or
1302	<	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1303	<	end;
1304	<
1305	<	procedure TIBCustomDataSet.CheckEditState;
1306	<	begin
1307	<	case State of
1308	<	{ Check all the wsEditMode types }
1309	<	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1310	<	dsNewValue, dsInternalCalc :
1311	<	begin
1312	<	if (State in [dsEdit]) and (not CanEdit) then
1313	<	IBError(ibxeCannotUpdate, [nil]);
1314	<	if (State in [dsInsert]) and (not CanInsert) then
1315	<	IBError(ibxeCannotInsert, [nil]);
1316	<	end;
1317	<	else
1318	<	IBError(ibxeNotEditing, [])
1319	<	end;
1320	<	end;
1321	<
1322	<	procedure TIBCustomDataSet.ClearBlobCache;
1323	<	var
1324	<	i: Integer;
1325	<	begin
1326	<	for i := 0 to FBlobStreamList.Count - 1 do
1327	<	begin
1328	<	TIBBlobStream(FBlobStreamList[i]).Free;
1329	<	FBlobStreamList[i] := nil;
1330	<	end;
1331	<	FBlobStreamList.Pack;
1332	<	end;
1333	<
1334	<	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1335	<	begin
1336	<	Move(Source^, Dest^, FRecordBufferSize);
1337	<	end;
1338	<
1339	<	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1340	<	begin
1341	<	if Active then
1342	<	Active := False;
1343	<	FInternalPrepared := False;
1344	<	if Assigned(FBeforeDatabaseDisconnect) then
1345	<	FBeforeDatabaseDisconnect(Sender);
1346	<	end;
1347	<
1348	<	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1349	<	begin
1350	<	if Assigned(FAfterDatabaseDisconnect) then
1351	<	FAfterDatabaseDisconnect(Sender);
1352	<	end;
1353	<
1354	<	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1355	<	begin
1356	<	if Assigned(FDatabaseFree) then
1357	<	FDatabaseFree(Sender);
1358	<	end;
1359	<
1360	<	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject);
1361	<	begin
1362	<	if Active then
1363	<	Active := False;
1364	<	if FQSelect <> nil then
1365	<	FQSelect.FreeHandle;
1366	<	if FQDelete <> nil then
1367	<	FQDelete.FreeHandle;
1368	<	if FQInsert <> nil then
1369	<	FQInsert.FreeHandle;
1370	<	if FQModify <> nil then
1371	<	FQModify.FreeHandle;
1372	<	if FQRefresh <> nil then
1373	<	FQRefresh.FreeHandle;
1374	<	if Assigned(FBeforeTransactionEnd) then
1375	<	FBeforeTransactionEnd(Sender);
1376	<	end;
1377	<
1378	<	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1379	<	begin
1380	<	if Assigned(FAfterTransactionEnd) then
1381	<	FAfterTransactionEnd(Sender);
1382	<	end;
1383	<
1384	<	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1385	<	begin
1386	<	if Assigned(FTransactionFree) then
1387	<	FTransactionFree(Sender);
1388	<	end;
1389	<
1390	<	{ Read the record from FQSelect.Current into the record buffer
1391	<	Then write the buffer to in memory cache }
1392	<	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
1393	<	RecordNumber: Integer; Buffer: PChar);
1394	<	var
1395	<	p: PRecordData;
1396	<	pbd: PBlobDataArray;
1397	<	i, j: Integer;
1398	<	LocalData: Pointer;
1399	<	LocalDate, LocalDouble: Double;
1400	<	LocalInt: Integer;
1401	<	LocalInt64: Int64;
1402	<	LocalCurrency: Currency;
1403	<	FieldsLoaded: Integer;
1404	<	temp: TIBXSQLVAR;
1405	<	begin
1406	<	p := PRecordData(Buffer);
1407	<	{ Make sure blob cache is empty }
1408	<	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
1409	<	if RecordNumber > -1 then
1410	<	for i := 0 to BlobFieldCount - 1 do
1411	<	pbd^[i] := nil;
1412	<	{ Get record information }
1413	<	p^.rdBookmarkFlag := bfCurrent;
1414	<	p^.rdFieldCount := Qry.Current.Count;
1415	<	p^.rdRecordNumber := RecordNumber;
1416	<	p^.rdUpdateStatus := usUnmodified;
1417	<	p^.rdCachedUpdateStatus := cusUnmodified;
1418	<	p^.rdSavedOffset := $FFFFFFFF;
1419	<
1420	<	{ Load up the fields }
1421	<	FieldsLoaded := FQSelect.Current.Count;
1422	<	j := 1;
1423	<	for i := 0 to Qry.Current.Count - 1 do
1424	<	begin
1425	<	if (Qry = FQSelect) then
1426	<	j := i + 1
1427	<	else begin
1428	<	if FieldsLoaded = 0 then
1429	<	break;
1430	<	j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1;
1431	<	if j < 1 then
1432	<	continue
1433	<	else
1434	<	Dec(FieldsLoaded);
1435	<	end;
1436	<	with FQSelect.Current[j - 1].Data^ do
1437	<	if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
1438	<	begin
1439	<	if sqllen <= 8 then
1440	<	p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^;
1441	<	continue;
1442	<	end;
1443	<	if j > 0 then with p^ do
1444	<	begin
1445	<	rdFields[j].fdDataType :=
1446	<	Qry.Current[i].Data^.sqltype and (not 1);
1447	<	rdFields[j].fdDataScale :=
1448	<	Qry.Current[i].Data^.sqlscale;
1449	<	rdFields[j].fdNullable :=
1450	<	(Qry.Current[i].Data^.sqltype and 1 = 1);
1451	<	rdFields[j].fdIsNull :=
1452	<	(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1));
1453	<	LocalData := Qry.Current[i].Data^.sqldata;
1454	<	case rdFields[j].fdDataType of
1455	<	SQL_TIMESTAMP:
1456	<	begin
1457	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1458	<	if RecordNumber >= 0 then
1459	<	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime));
1460	<	LocalData := PChar(@LocalDate);
1461	<	end;
1462	<	SQL_TYPE_DATE:
1463	<	begin
1464	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1465	<	if RecordNumber >= 0 then
1466	<	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date;
1467	<	LocalData := PChar(@LocalInt);
1468	<	end;
1469	<	SQL_TYPE_TIME:
1470	<	begin
1471	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1472	<	if RecordNumber >= 0 then
1473	<	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time;
1474	<	LocalData := PChar(@LocalInt);
1475	<	end;
1476	<	SQL_SHORT, SQL_LONG:
1477	<	begin
1478	<	if (rdFields[j].fdDataScale = 0) then
1479	<	begin
1480	<	rdFields[j].fdDataSize := SizeOf(Integer);
1481	<	if RecordNumber >= 0 then
1482	<	LocalInt := Qry.Current[i].AsLong;
1483	<	LocalData := PChar(@LocalInt);
1484	<	end
1485	<	else if (rdFields[j].fdDataScale >= (-4)) then
1486	<	begin
1487	<	rdFields[j].fdDataSize := SizeOf(Currency);
1488	<	if RecordNumber >= 0 then
1489	<	LocalCurrency := Qry.Current[i].AsCurrency;
1490	<	LocalData := PChar(@LocalCurrency);
1491	<	end
1492	<	else begin
1493	<	rdFields[j].fdDataSize := SizeOf(Double);
1494	<	if RecordNumber >= 0 then
1495	<	LocalDouble := Qry.Current[i].AsDouble;
1496	<	LocalData := PChar(@LocalDouble);
1497	<	end;
1498	<	end;
1499	<	SQL_INT64:
1500	<	begin
1501	<	if (rdFields[j].fdDataScale = 0) then
1502	<	begin
1503	<	rdFields[j].fdDataSize := SizeOf(Int64);
1504	<	if RecordNumber >= 0 then
1505	<	LocalInt64 := Qry.Current[i].AsInt64;
1506	<	LocalData := PChar(@LocalInt64);
1507	<	end
1508	<	else if (rdFields[j].fdDataScale >= (-4)) then
1509	<	begin
1510	<	rdFields[j].fdDataSize := SizeOf(Currency);
1511	<	if RecordNumber >= 0 then
1512	<	LocalCurrency := Qry.Current[i].AsCurrency;
1513	<	LocalData := PChar(@LocalCurrency);
1514	<	end
1515	<	else begin
1516	<	rdFields[j].fdDataSize := SizeOf(Double);
1517	<	if RecordNumber >= 0 then
1518	<	LocalDouble := Qry.Current[i].AsDouble;
1519	<	LocalData := PChar(@LocalDouble);
1520	<	end
1521	<	end;
1522	<	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
1523	<	begin
1524	<	rdFields[j].fdDataSize := SizeOf(Double);
1525	<	if RecordNumber >= 0 then
1526	<	LocalDouble := Qry.Current[i].AsDouble;
1527	<	LocalData := PChar(@LocalDouble);
1528	<	end;
1529	<	SQL_VARYING:
1530	<	begin
1531	<	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1532	<	rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2);
1533	<	if RecordNumber >= 0 then
1534	<	begin
1535	<	if (rdFields[j].fdDataLength = 0) then
1536	<	LocalData := nil
1537	<	else
1538	<	begin
1539	<	temp :=  Qry.Current[i];
1540	<	LocalData := @temp.Data^.sqldata[2];
1541	<	(*              LocalData := @Qry.Current[i].Data^.sqldata[2];*)
1542	<	end;
1543	<	end;
1544	<	end;
1545	<	else { SQL_TEXT, SQL_BLOB, SQL_ARRAY, SQL_QUAD }
1546	<	begin
1547	<	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1548	<	if (rdFields[j].fdDataType = SQL_TEXT) then
1549	<	rdFields[j].fdDataLength := rdFields[j].fdDataSize;
1550	<	end;
1551	<	end;
1552	<	if RecordNumber < 0 then
1553	<	begin
1554	<	rdFields[j].fdIsNull := True;
1555	<	rdFields[j].fdDataOfs := FRecordSize;
1556	<	Inc(FRecordSize, rdFields[j].fdDataSize);
1557	<	end
1558	<	else begin
1559	<	if rdFields[j].fdDataType = SQL_VARYING then
1560	<	begin
1561	<	if LocalData <> nil then
1562	<	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength)
1563	<	end
1564	<	else
1565	<	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize)
1566	<	end;
1567	<	end;
1568	<	end;
1569	<	WriteRecordCache(RecordNumber, PChar(p));
1570	<	end;
1571	<
1572	<	function TIBCustomDataSet.GetActiveBuf: PChar;
1573	<	begin
1574	<	case State of
1575	<	dsBrowse:
1576	<	if IsEmpty then
1577	<	result := nil
1578	<	else
1579	<	result := ActiveBuffer;
1580	<	dsEdit, dsInsert:
1581	<	result := ActiveBuffer;
1582	<	dsCalcFields:
1583	<	result := CalcBuffer;
1584	<	dsFilter:
1585	<	result := FFilterBuffer;
1586	<	dsNewValue:
1587	<	result := ActiveBuffer;
1588	<	dsOldValue:
1589	<	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
1590	<	PRecordData(FOldBuffer)^.rdRecordNumber) then
1591	<	result := FOldBuffer
1592	<	else
1593	<	result := ActiveBuffer;
1594	<	else if not FOpen then
1595	<	result := nil
1596	<	else
1597	<	result := ActiveBuffer;
1598	<	end;
1599	<	end;
1600	<
1601	<	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
1602	<	begin
1603	<	if Active then
1604	<	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
1605	<	else
1606	<	result := cusUnmodified;
1607	<	end;
1608	<
1609	<	function TIBCustomDataSet.GetDatabase: TIBDatabase;
1610	<	begin
1611	<	result := FBase.Database;
1612	<	end;
1613	<
1614	<	function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE;
1615	<	begin
1616	<	result := FBase.DBHandle;
1617	<	end;
1618	<
1619	<	function TIBCustomDataSet.GetDeleteSQL: TStrings;
1620	<	begin
1621	<	result := FQDelete.SQL;
1622	<	end;
1623	<
1624	<	function TIBCustomDataSet.GetInsertSQL: TStrings;
1625	<	begin
1626	<	result := FQInsert.SQL;
1627	<	end;
1628	<
1629	<	function TIBCustomDataSet.GetSQLParams: TIBXSQLDA;
1630	<	begin
1631	<	if not FInternalPrepared then
1632	<	InternalPrepare;
1633	<	result := FQSelect.Params;
1634	<	end;
1635	<
1636	<	function TIBCustomDataSet.GetRefreshSQL: TStrings;
1637	<	begin
1638	<	result := FQRefresh.SQL;
1639	<	end;
1640	<
1641	<	function TIBCustomDataSet.GetSelectSQL: TStrings;
1642	<	begin
1643	<	result := FQSelect.SQL;
1644	<	end;
1645	<
1646	<	function TIBCustomDataSet.GetStatementType: TIBSQLTypes;
1647	<	begin
1648	<	result := FQSelect.SQLType;
1649	<	end;
1650	<
1651	<	function TIBCustomDataSet.GetModifySQL: TStrings;
1652	<	begin
1653	<	result := FQModify.SQL;
1654	<	end;
1655	<
1656	<	function TIBCustomDataSet.GetTransaction: TIBTransaction;
1657	<	begin
1658	<	result := FBase.Transaction;
1659	<	end;
1660	<
1661	<	function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE;
1662	<	begin
1663	<	result := FBase.TRHandle;
1664	<	end;
1665	<
1666	<	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
1667	<	begin
1668	<	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1669	<	FUpdateObject.Apply(ukDelete,Buff)
1670	<	else
1671	<	begin
1672	<	SetInternalSQLParams(FQDelete, Buff);
1673	<	FQDelete.ExecQuery;
1674	<	end;
1675	<	with PRecordData(Buff)^ do
1676	<	begin
1677	<	rdUpdateStatus := usDeleted;
1678	<	rdCachedUpdateStatus := cusUnmodified;
1679	<	end;
1680	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1681	<	end;
1682	<
1683	<	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
1684	<	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1685	<	var
1686	<	keyFieldList: TList;
1687	<	{$IF FPC_FULLVERSION >= 20700 }
1688	<	CurBookmark: TBookmark;
1689	<	{$ELSE}
1690	<	CurBookmark: string;
1691	<	{$ENDIF}
1692	<	fieldValue: Variant;
1693	<	lookupValues: array of variant;
1694	<	i, fieldCount: Integer;
1695	<	fieldValueAsString: string;
1696	<	lookupValueAsString: string;
1697	<	begin
1698	<	keyFieldList := TList.Create;
1699	<	try
1700	<	GetFieldList(keyFieldList, KeyFields);
1701	<	fieldCount := keyFieldList.Count;
1702	<	CurBookmark := Bookmark;
1703	<	result := false;
1704	<	SetLength(lookupValues, fieldCount);
1705	<	if not EOF then
1706	<	begin
1707	<	for i := 0 to fieldCount - 1 do  {expand key values into lookupValues array}
1708	<	begin
1709	<	if VarIsArray(KeyValues) then
1710	<	lookupValues[i] := KeyValues[i]
1711	<	else
1712	<	if i > 0 then
1713	<	lookupValues[i] := NULL
1714	<	else
1715	<	lookupValues[0] := KeyValues;
1716	<
1717	<	{convert to upper case is case insensitive search}
1718	<	if (TField(keyFieldList[i]).DataType = ftString) and
1719	<	not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
1720	<	lookupValues[i] := UpperCase(lookupValues[i]);
1721	<	end;
1722	<	end;
1723	<	while not result and not EOF do   {search for a matching record}
1724	<	begin
1725	<	i := 0;
1726	<	result := true;
1727	<	while result and (i < fieldCount) do
1728	<	{see if all of the key fields matches}
1729	<	begin
1730	<	fieldValue := TField(keyFieldList[i]).Value;
1731	<	result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
1732	<	if result and not VarIsNull(fieldValue) then
1733	<	begin
1734	<	try
1735	<	if TField(keyFieldList[i]).DataType = ftString then
1736	<	begin
1737	<	{strings need special handling because of the locate options that
1738	<	apply to them}
1739	<	fieldValueAsString := TField(keyFieldList[i]).AsString;
1740	<	lookupValueAsString := lookupValues[i];
1741	<	if (loCaseInsensitive in Options) then
1742	<	fieldValueAsString := UpperCase(fieldValueAsString);
1743	<
1744	<	if (loPartialKey in Options) then
1745	<	result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
1746	<	else
1747	<	result := result and (fieldValueAsString = lookupValueAsString);
1748	<	end
1749	<	else
1750	<	result := result and (lookupValues[i] =
1751	<	VarAsType(fieldValue, VarType(lookupValues[i])));
1752	<	except on EVariantError do
1753	<	result := False;
1754	<	end;
1755	<	end;
1756	<	Inc(i);
1757	<	end;
1758	<	if not result then
1759	<	Next;
1760	<	end;
1761	<	if not result then
1762	<	Bookmark := CurBookmark
1763	<	else
1764	<	CursorPosChanged;
1765	<	finally
1766	<	keyFieldList.Free;
1767	<	SetLength(lookupValues,0)
1768	<	end;
1769	<	end;
1770	<
1771	<	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
1772	<	var
1773	<	i, j, k: Integer;
1774	<	pbd: PBlobDataArray;
1775	<	begin
1776	<	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
1777	<	j := 0;
1778	<	for i := 0 to FieldCount - 1 do
1779	<	if Fields[i].IsBlob then
1780	<	begin
1781	<	k := FMappedFieldPosition[Fields[i].FieldNo -1];
1782	<	if pbd^[j] <> nil then
1783	<	begin
1784	<	pbd^[j].Finalize;
1785	<	PISC_QUAD(
1786	<	PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ :=
1787	<	pbd^[j].BlobID;
1788	<	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
1789	<	end;
1790	<	Inc(j);
1791	<	end;
1792	<	if Assigned(FUpdateObject) then
1793	<	begin
1794	<	if (Qry = FQDelete) then
1795	<	FUpdateObject.Apply(ukDelete,Buff)
1796	<	else if (Qry = FQInsert) then
1797	<	FUpdateObject.Apply(ukInsert,Buff)
1798	<	else
1799	<	FUpdateObject.Apply(ukModify,Buff);
1800	<	end
1801	<	else begin
1802	<	SetInternalSQLParams(Qry, Buff);
1803	<	Qry.ExecQuery;
1804	<	end;
1805	<	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
1806	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
1807	<	SetModified(False);
1808	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1809	<	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
1810	<	InternalRefreshRow;
1811	<	end;
1812	<
1813	<	procedure TIBCustomDataSet.InternalRefreshRow;
1814	<	var
1815	<	Buff: PChar;
1816	<	SetCursor: Boolean;
1817	<	ofs: DWORD;
1818	<	Qry: TIBSQL;
1819	<	begin
1820	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1821	<	if SetCursor then
1822	<	Screen.Cursor := crHourGlass;
1823	<	try
1824	<	Buff := GetActiveBuf;
1825	<	if CanRefresh then
1826	<	begin
1827	<	if Buff <> nil then
1828	<	begin
1829	<	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
1830	<	begin
1831	<	Qry := TIBSQL.Create(self);
1832	<	Qry.Database := Database;
1833	<	Qry.Transaction := Transaction;
1834	<	Qry.GoToFirstRecordOnExecute := False;
1835	<	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
1836	<	end
1837	<	else
1838	<	Qry := FQRefresh;
1839	<	SetInternalSQLParams(Qry, Buff);
1840	<	Qry.ExecQuery;
1841	<	try
1842	<	if (Qry.SQLType = SQLExecProcedure) or
1843	<	(Qry.Next <> nil) then
1844	<	begin
1845	<	ofs := PRecordData(Buff)^.rdSavedOffset;
1846	<	FetchCurrentRecordToBuffer(Qry,
1847	<	PRecordData(Buff)^.rdRecordNumber,
1848	<	Buff);
1849	<	if FCachedUpdates and (ofs <> $FFFFFFFF) then
1850	<	begin
1851	<	PRecordData(Buff)^.rdSavedOffset := ofs;
1852	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1853	<	SaveOldBuffer(Buff);
1854	<	end;
1855	<	end;
1856	<	finally
1857	<	Qry.Close;
1858	<	end;
1859	<	if Qry <> FQRefresh then
1860	<	Qry.Free;
1861	<	end
1862	<	end
1863	<	else
1864	<	IBError(ibxeCannotRefresh, [nil]);
1865	<	finally
1866	<	if SetCursor and (Screen.Cursor = crHourGlass) then
1867	<	Screen.Cursor := crDefault;
1868	<	end;
1869	<	end;
1870	<
1871	<	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
1872	<	var
1873	<	NewBuffer, OldBuffer: PRecordData;
1874	<
1875	<	begin
1876	<	NewBuffer := nil;
1877	<	OldBuffer := nil;
1878	<	NewBuffer := PRecordData(AllocRecordBuffer);
1879	<	OldBuffer := PRecordData(AllocRecordBuffer);
1880	<	try
1881	<	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
1882	<	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
1883	<	case NewBuffer^.rdCachedUpdateStatus of
1884	<	cusInserted:
1885	<	begin
1886	<	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
1887	<	Inc(FDeletedRecords);
1888	<	end;
1889	<	cusModified,
1890	<	cusDeleted:
1891	<	begin
1892	<	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
1893	<	Dec(FDeletedRecords);
1894	<	CopyRecordBuffer(OldBuffer, NewBuffer);
1895	<	end;
1896	<	end;
1897	<
1898	<	if State in dsEditModes then
1899	<	Cancel;
1900	<
1901	<	WriteRecordCache(RecordNumber, PChar(NewBuffer));
1902	<
1903	<	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
1904	<	ReSync([]);
1905	<	finally
1906	<	FreeRecordBuffer(PChar(NewBuffer));
1907	<	FreeRecordBuffer(PChar(OldBuffer));
1908	<	end;
1909	<	end;
1910	<
1911	<	{ A visible record is one that is not truly deleted,
1912	<	and it is also listed in the FUpdateRecordTypes set }
1913	<
1914	<	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
1915	<	begin
1916	<	result := True;
1917	<	if not (State = dsOldValue) then
1918	<	result :=
1919	<	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
1920	<	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
1921	<	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
1922	<	end;
1923	<
1924	<
1925	<	function TIBCustomDataSet.LocateNext(const KeyFields: string;
1926	<	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1927	<	begin
1928	<	DisableControls;
1929	<	try
1930	<	result := InternalLocate(KeyFields, KeyValues, Options);
1931	<	finally
1932	<	EnableControls;
1933	<	end;
1934	<	end;
1935	<
1936	<	procedure TIBCustomDataSet.InternalPrepare;
1937	<	var
1938	<	SetCursor: Boolean;
1939	<	DidActivate: Boolean;
1940	<	begin
1941	<	if FInternalPrepared then
1942	<	Exit;
1943	<	DidActivate := False;
1944	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1945	<	if SetCursor then
1946	<	Screen.Cursor := crHourGlass;
1947	<	try
1948	<	ActivateConnection;
1949	<	DidActivate := ActivateTransaction;
1950	<	FBase.CheckDatabase;
1951	<	FBase.CheckTransaction;
1952	<	if HasParser and (FParser.SQLText <> FQSelect.SQL.Text) then
1953	<	FQSelect.SQL.Text := FParser.SQLText;
1954	<	//   writeln( FQSelect.SQL.Text);
1955	<	if FQSelect.SQL.Text <> '' then
1956	<	begin
1957	<	if not FQSelect.Prepared then
1958	<	begin
1959	<	FQSelect.GenerateParamNames := FGenerateParamNames;
1960	<	FQSelect.ParamCheck := ParamCheck;
1961	<	FQSelect.Prepare;
1962	<	end;
1963	<	FQDelete.GenerateParamNames := FGenerateParamNames;
1964	<	if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
1965	<	FQDelete.Prepare;
1966	<	FQInsert.GenerateParamNames := FGenerateParamNames;
1967	<	if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
1968	<	FQInsert.Prepare;
1969	<	FQRefresh.GenerateParamNames := FGenerateParamNames;
1970	<	if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
1971	<	FQRefresh.Prepare;
1972	<	FQModify.GenerateParamNames := FGenerateParamNames;
1973	<	if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
1974	<	FQModify.Prepare;
1975	<	FInternalPrepared := True;
1976	<	InternalInitFieldDefs;
1977	<	end else
1978	<	IBError(ibxeEmptyQuery, [nil]);
1979	<	finally
1980	<	if DidActivate then
1981	<	DeactivateTransaction;
1982	<	if SetCursor and (Screen.Cursor = crHourGlass) then
1983	<	Screen.Cursor := crDefault;
1984	<	end;
1985	<	end;
1986	<
1987	<	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
1988	<	begin
1989	<	SetModified(Value);
1990	<	end;
1991	<
1992	<	procedure TIBCustomDataSet.RevertRecord;
1993	<	var
1994	<	Buff: PRecordData;
1995	<	begin
1996	<	if FCachedUpdates and FUpdatesPending then
1997	<	begin
1998	<	Buff := PRecordData(GetActiveBuf);
1999	<	InternalRevertRecord(Buff^.rdRecordNumber);
2000	<	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
2001	<	DataEvent(deRecordChange, 0);
2002	<	end;
2003	<	end;
2004	<
2005	<	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
2006	<	var
2007	<	OldBuffer: Pointer;
2008	<	procedure CopyOldBuffer;
2009	<	begin
2010	<	CopyRecordBuffer(Buffer, OldBuffer);
2011	<	if BlobFieldCount > 0 then
2012	<	FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream),
2013	<	0);
2014	<	end;
2015	<
2016	<	begin
2017	<	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
2018	<	begin
2019	<	OldBuffer := AllocRecordBuffer;
2020	<	try
2021	<	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
2022	<	begin
2023	<	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
2024	<	FILE_END);
2025	<	CopyOldBuffer;
2026	<	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
2027	<	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
2028	<	FILE_BEGIN, Buffer);
2029	<	end
2030	<	else begin
2031	<	CopyOldBuffer;
2032	<	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2033	<	OldBuffer);
2034	<	end;
2035	<	finally
2036	<	FreeRecordBuffer(PChar(OldBuffer));
2037	<	end;
2038	<	end;
2039	<	end;
2040	<
2041	<	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
2042	<	begin
2043	<	if (Value <= 0) then
2044	<	FBufferChunks := BufferCacheSize
2045	<	else
2046	<	FBufferChunks := Value;
2047	<	end;
2048	<
2049	<	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
2050	<	begin
2051	<	if (FBase.Database <> Value) then
2052	<	begin
2053	<	CheckDatasetClosed;
2054	<	FBase.Database := Value;
2055	<	FQDelete.Database := Value;
2056	<	FQInsert.Database := Value;
2057	<	FQRefresh.Database := Value;
2058	<	FQSelect.Database := Value;
2059	<	FQModify.Database := Value;
2060	<	end;
2061	<	end;
2062	<
2063	<	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
2064	<	begin
2065	<	if FQDelete.SQL.Text <> Value.Text then
2066	<	begin
2067	<	Disconnect;
2068	<	FQDelete.SQL.Assign(Value);
2069	<	end;
2070	<	end;
2071	<
2072	<	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
2073	<	begin
2074	<	if FQInsert.SQL.Text <> Value.Text then
2075	<	begin
2076	<	Disconnect;
2077	<	FQInsert.SQL.Assign(Value);
2078	<	end;
2079	<	end;
2080	<
2081	<	procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
2082	<	var
2083	<	i, j: Integer;
2084	<	cr, data: PChar;
2085	<	fn, st: string;
2086	<	OldBuffer: Pointer;
2087	<	ts: TTimeStamp;
2088	<	begin
2089	<	if (Buffer = nil) then
2090	<	IBError(ibxeBufferNotSet, [nil]);
2091	<	if (not FInternalPrepared) then
2092	<	InternalPrepare;
2093	<	OldBuffer := nil;
2094	<	try
2095	<	for i := 0 to Qry.Params.Count - 1 do
2096	<	begin
2097	<	fn := Qry.Params[i].Name;
2098	<	if (Pos('OLD_', fn) = 1) then {mbcs ok}
2099	<	begin
2100	<	fn := Copy(fn, 5, Length(fn));
2101	<	if not Assigned(OldBuffer) then
2102	<	begin
2103	<	OldBuffer := AllocRecordBuffer;
2104	<	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
2105	<	end;
2106	<	cr := OldBuffer;
2107	<	end
2108	<	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
2109	<	begin
2110	<	fn := Copy(fn, 5, Length(fn));
2111	<	cr := Buffer;
2112	<	end
2113	<	else
2114	<	cr := Buffer;
2115	<	j := FQSelect.FieldIndex[fn] + 1;
2116	<	if (j > 0) then
2117	<	with PRecordData(cr)^ do
2118	<	begin
2119	<	if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize}
2120	<	begin
2121	<	PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey;
2122	<	continue;
2123	<	end;
2124	<	if rdFields[j].fdIsNull then
2125	<	Qry.Params[i].IsNull := True
2126	<	else begin
2127	<	Qry.Params[i].IsNull := False;
2128	<	data := cr + rdFields[j].fdDataOfs;
2129	<	case rdFields[j].fdDataType of
2130	<	SQL_TEXT, SQL_VARYING:
2131	<	begin
2132	<	SetString(st, data, rdFields[j].fdDataLength);
2133	<	Qry.Params[i].AsString := st;
2134	<	end;
2135	<	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
2136	<	Qry.Params[i].AsDouble := PDouble(data)^;
2137	<	SQL_SHORT, SQL_LONG:
2138	<	begin
2139	<	if rdFields[j].fdDataScale = 0 then
2140	<	Qry.Params[i].AsLong := PLong(data)^
2141	<	else if rdFields[j].fdDataScale >= (-4) then
2142	<	Qry.Params[i].AsCurrency := PCurrency(data)^
2143	<	else
2144	<	Qry.Params[i].AsDouble := PDouble(data)^;
2145	<	end;
2146	<	SQL_INT64:
2147	<	begin
2148	<	if rdFields[j].fdDataScale = 0 then
2149	<	Qry.Params[i].AsInt64 := PInt64(data)^
2150	<	else if rdFields[j].fdDataScale >= (-4) then
2151	<	Qry.Params[i].AsCurrency := PCurrency(data)^
2152	<	else
2153	<	Qry.Params[i].AsDouble := PDouble(data)^;
2154	<	end;
2155	<	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
2156	<	Qry.Params[i].AsQuad := PISC_QUAD(data)^;
2157	<	SQL_TYPE_DATE:
2158	<	begin
2159	<	ts.Date := PInt(data)^;
2160	<	ts.Time := 0;
2161	<	Qry.Params[i].AsDate :=
2162	<	TimeStampToDateTime(ts);
2163	<	end;
2164	<	SQL_TYPE_TIME:
2165	<	begin
2166	<	ts.Date := 0;
2167	<	ts.Time := PInt(data)^;
2168	<	Qry.Params[i].AsTime :=
2169	<	TimeStampToDateTime(ts);
2170	<	end;
2171	<	SQL_TIMESTAMP:
2172	<	Qry.Params[i].AsDateTime :=
2173	<	TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^)));
2174	<	end;
2175	<	end;
2176	<	end;
2177	<	end;
2178	<	finally
2179	<	if (OldBuffer <> nil) then
2180	<	FreeRecordBuffer(PChar(OldBuffer));
2181	<	end;
2182	<	end;
2183	<
2184	<	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2185	<	begin
2186	<	if FQRefresh.SQL.Text <> Value.Text then
2187	<	begin
2188	<	Disconnect;
2189	<	FQRefresh.SQL.Assign(Value);
2190	<	end;
2191	<	end;
2192	<
2193	<	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2194	<	begin
2195	<	if FQSelect.SQL.Text <> Value.Text then
2196	<	begin
2197	<	Disconnect;
2198	<	FQSelect.SQL.Assign(Value);
2199	<	FBaseSQLSelect.assign(Value);
2200	<	end;
2201	<	end;
2202	<
2203	<	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2204	<	begin
2205	<	if FQModify.SQL.Text <> Value.Text then
2206	<	begin
2207	<	Disconnect;
2208	<	FQModify.SQL.Assign(Value);
2209	<	end;
2210	<	end;
2211	<
2212	<	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2213	<	begin
2214	<	if (FBase.Transaction <> Value) then
2215	<	begin
2216	<	CheckDatasetClosed;
2217	<	FBase.Transaction := Value;
2218	<	FQDelete.Transaction := Value;
2219	<	FQInsert.Transaction := Value;
2220	<	FQRefresh.Transaction := Value;
2221	<	FQSelect.Transaction := Value;
2222	<	FQModify.Transaction := Value;
2223	<	end;
2224	<	end;
2225	<
2226	<	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2227	<	begin
2228	<	CheckDatasetClosed;
2229	<	FUniDirectional := Value;
2230	<	end;
2231	<
2232	<	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2233	<	begin
2234	<	FUpdateRecordTypes := Value;
2235	<	if Active then
2236	<	First;
2237	<	end;
2238	<
2239	<	procedure TIBCustomDataSet.RefreshParams;
2240	<	var
2241	<	DataSet: TDataSet;
2242	<	begin
2243	<	DisableControls;
2244	<	try
2245	<	if FDataLink.DataSource <> nil then
2246	<	begin
2247	<	DataSet := FDataLink.DataSource.DataSet;
2248	<	if DataSet <> nil then
2249	<	if DataSet.Active and (DataSet.State <> dsSetKey) then
2250	<	begin
2251	<	Close;
2252	<	Open;
2253	<	end;
2254	<	end;
2255	<	finally
2256	<	EnableControls;
2257	<	end;
2258	<	end;
2259	<
2260	<
2261	<	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2262	<	begin
2263	<	Active := false;
2264	<	{  if FOpen then
2265	<	InternalClose;}
2266	<	if FInternalPrepared then
2267	<	InternalUnPrepare;
2268	<	FieldDefs.Clear;
2269	<	FieldDefs.Updated := false;
2270	<	end;
2271	<
2272	<	{ I can "undelete" uninserted records (make them "inserted" again).
2273	<	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2274	<	procedure TIBCustomDataSet.Undelete;
2275	<	var
2276	<	Buff: PRecordData;
2277	<	begin
2278	<	CheckActive;
2279	<	Buff := PRecordData(GetActiveBuf);
2280	<	with Buff^ do
2281	<	begin
2282	<	if rdCachedUpdateStatus = cusUninserted then
2283	<	begin
2284	<	rdCachedUpdateStatus := cusInserted;
2285	<	Dec(FDeletedRecords);
2286	<	end
2287	<	else if (rdUpdateStatus = usDeleted) and
2288	<	(rdCachedUpdateStatus = cusDeleted) then
2289	<	begin
2290	<	rdCachedUpdateStatus := cusUnmodified;
2291	<	rdUpdateStatus := usUnmodified;
2292	<	Dec(FDeletedRecords);
2293	<	end;
2294	<	WriteRecordCache(rdRecordNumber, PChar(Buff));
2295	<	end;
2296	<	end;
2297	<
2298	<	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2299	<	begin
2300	<	if Active then
2301	<	if GetActiveBuf <> nil then
2302	<	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2303	<	else
2304	<	result := usUnmodified
2305	<	else
2306	<	result := usUnmodified;
2307	<	end;
2308	<
2309	<	function TIBCustomDataSet.IsSequenced: Boolean;
2310	<	begin
2311	<	Result := Assigned( FQSelect ) and FQSelect.EOF;
2312	<	end;
2313	<
2314	<	function TIBCustomDataSet.ParamByName(ParamName: String): TIBXSQLVAR;
2315	<	begin
2316	<	ActivateConnection;
2317	<	ActivateTransaction;
2318	<	if not FInternalPrepared then
2319	<	InternalPrepare;
2320	<	Result := Params.ByName(ParamName);
2321	<	end;
2322	<
2323	<	{Beware: the parameter FCache is used as an identifier to determine which
2324	<	cache is being operated on and is not referenced in the computation.
2325	<	The result is an adjusted offset into the identified cache, either the
2326	<	Buffer Cache or the old Buffer Cache.}
2327	<
2328	<	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
2329	<	Origin: Integer): DWORD;
2330	<	var
2331	<	OldCacheSize: Integer;
2332	<	begin
2333	<	if (FCache = FBufferCache) then
2334	<	begin
2335	<	case Origin of
2336	<	FILE_BEGIN:    FBPos := Offset;
2337	<	FILE_CURRENT:  FBPos := FBPos + Offset;
2338	<	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
2339	<	end;
2340	<	OldCacheSize := FCacheSize;
2341	<	while (FBPos >= DWORD(FCacheSize)) do
2342	<	Inc(FCacheSize, FBufferChunkSize);
2343	<	if FCacheSize > OldCacheSize then
2344	<	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
2345	<	result := FBPos;
2346	<	end
2347	<	else begin
2348	<	case Origin of
2349	<	FILE_BEGIN:    FOBPos := Offset;
2350	<	FILE_CURRENT:  FOBPos := FOBPos + Offset;
2351	<	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
2352	<	end;
2353	<	OldCacheSize := FOldCacheSize;
2354	<	while (FBPos >= DWORD(FOldCacheSize)) do
2355	<	Inc(FOldCacheSize, FBufferChunkSize);
2356	<	if FOldCacheSize > OldCacheSize then
2357	<	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
2358	<	result := FOBPos;
2359	<	end;
2360	<	end;
2361	<
2362	<	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2363	<	Buffer: PChar);
2364	<	var
2365	<	pCache: PChar;
2366	<	AdjustedOffset: DWORD;
2367	<	bOld: Boolean;
2368	<	begin
2369	<	bOld := (FCache = FOldBufferCache);
2370	<	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2371	<	if not bOld then
2372	<	pCache := FBufferCache + AdjustedOffset
2373	<	else
2374	<	pCache := FOldBufferCache + AdjustedOffset;
2375	<	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
2376	<	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2377	<	end;
2378	<
2379	<	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
2380	<	ReadOldBuffer: Boolean);
2381	<	begin
2382	<	if FUniDirectional then
2383	<	RecordNumber := RecordNumber mod UniCache;
2384	<	if (ReadOldBuffer) then
2385	<	begin
2386	<	ReadRecordCache(RecordNumber, Buffer, False);
2387	<	if FCachedUpdates and
2388	<	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
2389	<	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2390	<	Buffer)
2391	<	else
2392	<	if ReadOldBuffer and
2393	<	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
2394	<	CopyRecordBuffer( FOldBuffer, Buffer )
2395	<	end
2396	<	else
2397	<	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2398	<	end;
2399	<
2400	<	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2401	<	Buffer: PChar);
2402	<	var
2403	<	pCache: PChar;
2404	<	AdjustedOffset: DWORD;
2405	<	bOld: Boolean;
2406	<	dwEnd: DWORD;
2407	<	begin
2408	<	bOld := (FCache = FOldBufferCache);
2409	<	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2410	<	if not bOld then
2411	<	pCache := FBufferCache + AdjustedOffset
2412	<	else
2413	<	pCache := FOldBufferCache + AdjustedOffset;
2414	<	Move(Buffer^, pCache^, FRecordBufferSize);
2415	<	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2416	<	if not bOld then
2417	<	begin
2418	<	if (dwEnd > FBEnd) then
2419	<	FBEnd := dwEnd;
2420	<	end
2421	<	else begin
2422	<	if (dwEnd > FOBEnd) then
2423	<	FOBEnd := dwEnd;
2424	<	end;
2425	<	end;
2426	<
2427	<	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
2428	<	begin
2429	<	if RecordNumber >= 0 then
2430	<	begin
2431	<	if FUniDirectional then
2432	<	RecordNumber := RecordNumber mod UniCache;
2433	<	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2434	<	end;
2435	<	end;
2436	<
2437	<	function TIBCustomDataSet.AllocRecordBuffer: PChar;
2438	<	begin
2439	<	result := nil;
2440	<	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
2441	<	Move(FModelBuffer^, result^, FRecordBufferSize);
2442	<	end;
2443	<
2444	<	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
2445	<	var
2446	<	pb: PBlobDataArray;
2447	<	fs: TIBBlobStream;
2448	<	Buff: PChar;
2449	<	bTr, bDB: Boolean;
2450	<	begin
2451	<	Buff := GetActiveBuf;
2452	<	if Buff = nil then
2453	<	begin
2454	<	fs := TIBBlobStream.Create;
2455	<	fs.Mode := bmReadWrite;
2456	<	FBlobStreamList.Add(Pointer(fs));
2457	<	result := TIBDSBlobStream.Create(Field, fs, Mode);
2458	<	exit;
2459	<	end;
2460	<	pb := PBlobDataArray(Buff + FBlobCacheOffset);
2461	<	if pb^[Field.Offset] = nil then
2462	<	begin
2463	<	AdjustRecordOnInsert(Buff);
2464	<	pb^[Field.Offset] := TIBBlobStream.Create;
2465	<	fs := pb^[Field.Offset];
2466	<	FBlobStreamList.Add(Pointer(fs));
2467	<	fs.Mode := bmReadWrite;
2468	<	fs.Database := Database;
2469	<	fs.Transaction := Transaction;
2470	<	fs.BlobID :=
2471	<	PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
2472	<	if (CachedUpdates) then
2473	<	begin
2474	<	bTr := not Transaction.InTransaction;
2475	<	bDB := not Database.Connected;
2476	<	if bDB then
2477	<	Database.Open;
2478	<	if bTr then
2479	<	Transaction.StartTransaction;
2480	<	fs.Seek(0, soFromBeginning);
2481	<	if bTr then
2482	<	Transaction.Commit;
2483	<	if bDB then
2484	<	Database.Close;
2485	<	end;
2486	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
2487	<	end else
2488	<	fs := pb^[Field.Offset];
2489	<	result := TIBDSBlobStream.Create(Field, fs, Mode);
2490	<	end;
2491	<
2492	<	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
2493	<	const
2494	<	CMPLess = -1;
2495	<	CMPEql  =  0;
2496	<	CMPGtr  =  1;
2497	<	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
2498	<	(CMPGtr, CMPEql));
2499	<	begin
2500	<	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
2501	<
2502	<	if Result = 2 then
2503	<	begin
2504	<	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
2505	<	Result := CMPLess
2506	<	else
2507	<	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
2508	<	Result := CMPGtr
2509	<	else
2510	<	Result := CMPEql;
2511	<	end;
2512	<	end;
2513	<
2514	<	procedure TIBCustomDataSet.DoBeforeDelete;
2515	<	var
2516	<	Buff: PRecordData;
2517	<	begin
2518	<	if not CanDelete then
2519	<	IBError(ibxeCannotDelete, [nil]);
2520	<	Buff := PRecordData(GetActiveBuf);
2521	<	if FCachedUpdates and
2522	<	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
2523	<	SaveOldBuffer(PChar(Buff));
2524	<	inherited DoBeforeDelete;
2525	<	end;
2526	<
2527	<	procedure TIBCustomDataSet.DoBeforeEdit;
2528	<	var
2529	<	Buff: PRecordData;
2530	<	begin
2531	<	Buff := PRecordData(GetActiveBuf);
2532	<	if not(CanEdit or (FQModify.SQL.Count <> 0) or
2533	<	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
2534	<	IBError(ibxeCannotUpdate, [nil]);
2535	<	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
2536	<	SaveOldBuffer(PChar(Buff));
2537	<	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
2538	<	inherited DoBeforeEdit;
2539	<	end;
2540	<
2541	<	procedure TIBCustomDataSet.DoBeforeInsert;
2542	<	begin
2543	<	if not CanInsert then
2544	<	IBError(ibxeCannotInsert, [nil]);
2545	<	inherited DoBeforeInsert;
2546	<	end;
2547	<
2548	<	procedure TIBCustomDataSet.DoAfterInsert;
2549	<	begin
2550	<	if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
2551	<	GeneratorField.Apply;
2552	<	inherited DoAfterInsert;
2553	<	end;
2554	<
2555	<	procedure TIBCustomDataSet.DoBeforeOpen;
2556	<	begin
2557	<	if assigned(FParser) then
2558	<	FParser.Reset;
2559	<	DataEvent(deCheckBrowseMode,1); {Conventional use to report getting ready to prepare}
2560	<	inherited DoBeforeOpen;
2561	<	DataEvent(deCheckBrowseMode,2); {Conventional use to report the right time to set parameters}
2562	<	end;
2563	<
2564	<	procedure TIBCustomDataSet.DoBeforePost;
2565	<	begin
2566	<	inherited DoBeforePost;
2567	<	if (State = dsInsert) and
2568	<	(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
2569	<	GeneratorField.Apply
2570	<	end;
2571	<
2572	<	procedure TIBCustomDataSet.FetchAll;
2573	<	var
2574	<	SetCursor: Boolean;
2575	<	{$IF FPC_FULLVERSION >= 20700 }
2576	<	CurBookmark: TBookmark;
2577	<	{$ELSE}
2578	<	CurBookmark: string;
2579	<	{$ENDIF}
2580	<	begin
2581	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2582	<	if SetCursor then
2583	<	Screen.Cursor := crHourGlass;
2584	<	try
2585	<	if FQSelect.EOF or not FQSelect.Open then
2586	<	exit;
2587	<	DisableControls;
2588	<	try
2589	<	CurBookmark := Bookmark;
2590	<	Last;
2591	<	Bookmark := CurBookmark;
2592	<	finally
2593	<	EnableControls;
2594	<	end;
2595	<	finally
2596	<	if SetCursor and (Screen.Cursor = crHourGlass) then
2597	<	Screen.Cursor := crDefault;
2598	<	end;
2599	<	end;
2600	<
2601	<	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
2602	<	begin
2603	<	FreeMem(Buffer);
2604	<	Buffer := nil;
2605	<	end;
2606	<
2607	<	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
2608	<	begin
2609	<	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
2610	<	end;
2611	<
2612	<	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
2613	<	begin
2614	<	result := PRecordData(Buffer)^.rdBookmarkFlag;
2615	<	end;
2616	<
2617	<	function TIBCustomDataSet.GetCanModify: Boolean;
2618	<	begin
2619	<	result := (FQInsert.SQL.Text <> '') or
2620	<	(FQModify.SQL.Text <> '') or
2621	<	(FQDelete.SQL.Text <> '') or
2622	<	(Assigned(FUpdateObject));
2623	<	end;
2624	<
2625	<	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
2626	<	begin
2627	<	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
2628	<	begin
2629	<	UpdateCursorPos;
2630	<	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
2631	<	result := True;
2632	<	end
2633	<	else
2634	<	result := False;
2635	<	end;
2636	<
2637	<	function TIBCustomDataSet.GetDataSource: TDataSource;
2638	<	begin
2639	<	if FDataLink = nil then
2640	<	result := nil
2641	<	else
2642	<	result := FDataLink.DataSource;
2643	<	end;
2644	<
2645	<	function TIBCustomDataSet.GetDBAliasName(FieldNo: integer): string;
2646	<	begin
2647	<	Result := FAliasNameMap[FieldNo-1]
2648	<	end;
2649	<
2650	<	function TIBCustomDataSet.GetFieldDefFromAlias(aliasName: string): TFieldDef;
2651	<	var
2652	<	i: integer;
2653	<	begin
2654	<	Result := nil;
2655	<	for i := 0 to Length(FAliasNameMap) - 1 do
2656	<	if FAliasNameMap[i] = aliasName then
2657	<	begin
2658	<	Result := FieldDefs[i+1];
2659	<	Exit
2660	<	end;
2661	<	end;
2662	<
2663	<	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
2664	<	begin
2665	<	Result := DefaultFieldClasses[FieldType];
2666	<	end;
2667	<
2668	<	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
2669	<	begin
2670	<	result := GetFieldData(FieldByNumber(FieldNo), buffer);
2671	<	end;
2672	<
2673	<	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
2674	<	var
2675	<	Buff, Data: PChar;
2676	<	CurrentRecord: PRecordData;
2677	<	begin
2678	<	result := False;
2679	<	Buff := GetActiveBuf;
2680	<	if (Buff = nil) or
2681	<	(not IsVisible(Buff)) or not assigned(Field.DataSet) then
2682	<	exit;
2683	<	{ The intention here is to stuff the buffer with the data for the
2684	<	referenced field for the current record }
2685	<	CurrentRecord := PRecordData(Buff);
2686	<	if (Field.FieldNo < 0) then
2687	<	begin
2688	<	Inc(Buff, FRecordSize + Field.Offset);
2689	<	result := Boolean(Buff[0]);
2690	<	if result and (Buffer <> nil) then
2691	<	Move(Buff[1], Buffer^, Field.DataSize);
2692	<	end
2693	<	else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
2694	<	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
2695	<	begin
2696	<	result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull;
2697	<	if result and (Buffer <> nil) then
2698	<	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do
2699	<	begin
2700	<	Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs;
2701	<	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
2702	<	begin
2703	<	if fdDataLength <= Field.Size then
2704	<	begin
2705	<	Move(Data^, Buffer^, fdDataLength);
2706	<	PChar(Buffer)[fdDataLength] := #0;
2707	<	end
2708	<	else
2709	<	IBError(ibxeFieldSizeError,[Field.FieldName])
2710	<	end
2711	<	else
2712	<	Move(Data^, Buffer^, Field.DataSize);
2713	<	end;
2714	<	end;
2715	<	end;
2716	<
2717	<	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
2718	<	opposed to 0-based indexes.
2719	<	This is because we want LastRecordNumber/RecordCount = 1 }
2720	<
2721	<	function TIBCustomDataSet.GetRecNo: Integer;
2722	<	begin
2723	<	if GetActiveBuf = nil then
2724	<	result := 0
2725	<	else
2726	<	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
2727	<	end;
2728	<
2729	<	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
2730	<	DoCheck: Boolean): TGetResult;
2731	<	var
2732	<	Accept: Boolean;
2733	<	SaveState: TDataSetState;
2734	<	begin
2735	<	Result := grOK;
2736	<	if Filtered and Assigned(OnFilterRecord) then
2737	<	begin
2738	<	Accept := False;
2739	<	SaveState := SetTempState(dsFilter);
2740	<	while not Accept do
2741	<	begin
2742	<	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2743	<	if Result <> grOK then
2744	<	break;
2745	<	FFilterBuffer := Buffer;
2746	<	try
2747	<	Accept := True;
2748	<	OnFilterRecord(Self, Accept);
2749	<	if not Accept and (GetMode = gmCurrent) then
2750	<	GetMode := gmPrior;
2751	<	except
2752	<	//        Application.HandleException(Self);
2753	<	end;
2754	<	end;
2755	<	RestoreState(SaveState);
2756	<	end
2757	<	else
2758	<	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2759	<	end;
2760	<
2761	<	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
2762	<	DoCheck: Boolean): TGetResult;
2763	<	begin
2764	<	result := grError;
2765	<	case GetMode of
2766	<	gmCurrent: begin
2767	<	if (FCurrentRecord >= 0) then begin
2768	<	if FCurrentRecord < FRecordCount then
2769	<	ReadRecordCache(FCurrentRecord, Buffer, False)
2770	<	else begin
2771	<	while (not FQSelect.EOF) and
2772	<	(FQSelect.Next <> nil) and
2773	<	(FCurrentRecord >= FRecordCount) do begin
2774	<	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
2775	<	Inc(FRecordCount);
2776	<	end;
2777	<	FCurrentRecord := FRecordCount - 1;
2778	<	if (FCurrentRecord >= 0) then
2779	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2780	<	end;
2781	<	result := grOk;
2782	<	end else
2783	<	result := grBOF;
2784	<	end;
2785	<	gmNext: begin
2786	<	result := grOk;
2787	<	if FCurrentRecord = FRecordCount then
2788	<	result := grEOF
2789	<	else if FCurrentRecord = FRecordCount - 1 then begin
2790	<	if (not FQSelect.EOF) then begin
2791	<	FQSelect.Next;
2792	<	Inc(FCurrentRecord);
2793	<	end;
2794	<	if (FQSelect.EOF) then begin
2795	<	result := grEOF;
2796	<	end else begin
2797	<	Inc(FRecordCount);
2798	<	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
2799	<	end;
2800	<	end else if (FCurrentRecord < FRecordCount) then begin
2801	<	Inc(FCurrentRecord);
2802	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2803	<	end;
2804	<	end;
2805	<	else { gmPrior }
2806	<	begin
2807	<	if (FCurrentRecord = 0) then begin
2808	<	Dec(FCurrentRecord);
2809	<	result := grBOF;
2810	<	end else if (FCurrentRecord > 0) and
2811	<	(FCurrentRecord <= FRecordCount) then begin
2812	<	Dec(FCurrentRecord);
2813	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2814	<	result := grOk;
2815	<	end else if (FCurrentRecord = -1) then
2816	<	result := grBOF;
2817	<	end;
2818	<	end;
2819	<	if result = grOk then
2820	<	result := AdjustCurrentRecord(Buffer, GetMode);
2821	<	if result = grOk then with PRecordData(Buffer)^ do begin
2822	<	rdBookmarkFlag := bfCurrent;
2823	<	GetCalcFields(Buffer);
2824	<	end else if (result = grEOF) then begin
2825	<	CopyRecordBuffer(FModelBuffer, Buffer);
2826	<	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2827	<	end else if (result = grBOF) then begin
2828	<	CopyRecordBuffer(FModelBuffer, Buffer);
2829	<	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
2830	<	end else if (result = grError) then begin
2831	<	CopyRecordBuffer(FModelBuffer, Buffer);
2832	<	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2833	<	end;;
2834	<	end;
2835	<
2836	<	function TIBCustomDataSet.GetRecordCount: Integer;
2837	<	begin
2838	<	result := FRecordCount - FDeletedRecords;
2839	<	end;
2840	<
2841	<	function TIBCustomDataSet.GetRecordSize: Word;
2842	<	begin
2843	<	result := FRecordBufferSize;
2844	<	end;
2845	<
2846	<	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
2847	<	begin
2848	<	CheckEditState;
2849	<	begin
2850	<	{ When adding records, we *always* append.
2851	<	Insertion is just too costly }
2852	<	AdjustRecordOnInsert(Buffer);
2853	<	with PRecordData(Buffer)^ do
2854	<	begin
2855	<	rdUpdateStatus := usInserted;
2856	<	rdCachedUpdateStatus := cusInserted;
2857	<	end;
2858	<	if not CachedUpdates then
2859	<	InternalPostRecord(FQInsert, Buffer)
2860	<	else begin
2861	<	WriteRecordCache(FCurrentRecord, Buffer);
2862	<	FUpdatesPending := True;
2863	<	end;
2864	<	Inc(FRecordCount);
2865	<	InternalSetToRecord(Buffer);
2866	<	end
2867	<	end;
2868	<
2869	<	procedure TIBCustomDataSet.InternalCancel;
2870	<	var
2871	<	Buff: PChar;
2872	<	CurRec: Integer;
2873	<	begin
2874	<	inherited InternalCancel;
2875	<	Buff := GetActiveBuf;
2876	<	if Buff <> nil then begin
2877	<	CurRec := FCurrentRecord;
2878	<	AdjustRecordOnInsert(Buff);
2879	<	if (State = dsEdit) then begin
2880	<	CopyRecordBuffer(FOldBuffer, Buff);
2881	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2882	<	end else begin
2883	<	CopyRecordBuffer(FModelBuffer, Buff);
2884	<	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
2885	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2886	<	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
2887	<	FCurrentRecord := CurRec;
2888	<	end;
2889	<	end;
2890	<	end;
2891	<
2892	<
2893	<	procedure TIBCustomDataSet.InternalClose;
2894	<	begin
2895	<	if FDidActivate then
2896	<	DeactivateTransaction;
2897	<	FQSelect.Close;
2898	<	ClearBlobCache;
2899	<	FreeRecordBuffer(FModelBuffer);
2900	<	FreeRecordBuffer(FOldBuffer);
2901	<	FCurrentRecord := -1;
2902	<	FOpen := False;
2903	<	FRecordCount := 0;
2904	<	FDeletedRecords := 0;
2905	<	FRecordSize := 0;
2906	<	FBPos := 0;
2907	<	FOBPos := 0;
2908	<	FCacheSize := 0;
2909	<	FOldCacheSize := 0;
2910	<	FBEnd := 0;
2911	<	FOBEnd := 0;
2912	<	FreeMem(FBufferCache);
2913	<	FBufferCache := nil;
2914	<	FreeMem(FOldBufferCache);
2915	<	FOldBufferCache := nil;
2916	<	BindFields(False);
2917	<	if DefaultFields then DestroyFields;
2918	<	end;
2919	<
2920	<	procedure TIBCustomDataSet.InternalDelete;
2921	<	var
2922	<	Buff: PChar;
2923	<	SetCursor: Boolean;
2924	<	begin
2925	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2926	<	if SetCursor then
2927	<	Screen.Cursor := crHourGlass;
2928	<	try
2929	<	Buff := GetActiveBuf;
2930	<	if CanDelete then
2931	<	begin
2932	<	if not CachedUpdates then
2933	<	InternalDeleteRecord(FQDelete, Buff)
2934	<	else
2935	<	begin
2936	<	with PRecordData(Buff)^ do
2937	<	begin
2938	<	if rdCachedUpdateStatus = cusInserted then
2939	<	rdCachedUpdateStatus := cusUninserted
2940	<	else begin
2941	<	rdUpdateStatus := usDeleted;
2942	<	rdCachedUpdateStatus := cusDeleted;
2943	<	end;
2944	<	end;
2945	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2946	<	end;
2947	<	Inc(FDeletedRecords);
2948	<	FUpdatesPending := True;
2949	<	end else
2950	<	IBError(ibxeCannotDelete, [nil]);
2951	<	finally
2952	<	if SetCursor and (Screen.Cursor = crHourGlass) then
2953	<	Screen.Cursor := crDefault;
2954	<	end;
2955	<	end;
2956	<
2957	<	procedure TIBCustomDataSet.InternalFirst;
2958	<	begin
2959	<	FCurrentRecord := -1;
2960	<	end;
2961	<
2962	<	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
2963	<	begin
2964	<	FCurrentRecord := PInteger(Bookmark)^;
2965	<	end;
2966	<
2967	<	procedure TIBCustomDataSet.InternalHandleException;
2968	<	begin
2969	<	Application.HandleException(Self)
2970	<	end;
2971	<
2972	<	procedure TIBCustomDataSet.InternalInitFieldDefs;
2973	<	begin
2974	<	if not InternalPrepared then
2975	<	begin
2976	<	InternalPrepare;
2977	<	exit;
2978	<	end;
2979	<	FieldDefsFromQuery(FQSelect);
2980	<	end;
2981	<
2982	<	procedure TIBCustomDataSet.FieldDefsFromQuery(SourceQuery: TIBSQL);
2983	<	const
2984	<	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
2985	<	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
2986	<	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
2987	<	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
2988	<	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
2989	<	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
2990	<	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
2991	<	var
2992	<	FieldType: TFieldType;
2993	<	FieldSize: Word;
2994	<	FieldNullable : Boolean;
2995	<	i, FieldPosition, FieldPrecision: Integer;
2996	<	FieldAliasName, DBAliasName: string;
2997	<	RelationName, FieldName: string;
2998	<	Query : TIBSQL;
2999	<	FieldIndex: Integer;
3000	<	FRelationNodes : TRelationNode;
3001	<
3002	<	function Add_Node(Relation, Field : String) : TRelationNode;
3003	<	var
3004	<	FField : TFieldNode;
3005	<	begin
3006	<	if FRelationNodes.RelationName = '' then
3007	<	Result := FRelationNodes
3008	<	else
3009	<	begin
3010	<	Result := TRelationNode.Create;
3011	<	Result.NextRelation := FRelationNodes;
3012	<	end;
3013	<	Result.RelationName := Relation;
3014	<	FRelationNodes := Result;
3015	<	Query.Params[0].AsString := Relation;
3016	<	Query.ExecQuery;
3017	<	while not Query.Eof do
3018	<	begin
3019	<	FField := TFieldNode.Create;
3020	<	FField.FieldName := Query.Fields[2].AsString;
3021	<	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
3022	<	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
3023	<	FField.NextField := Result.FieldNodes;
3024	<	Result.FieldNodes := FField;
3025	<	Query.Next;
3026	<	end;
3027	<	Query.Close;
3028	<	end;
3029	<
3030	<	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
3031	<	var
3032	<	FRelation : TRelationNode;
3033	<	FField : TFieldNode;
3034	<	begin
3035	<	FRelation := FRelationNodes;
3036	<	while Assigned(FRelation) and
3037	<	(FRelation.RelationName <> Relation) do
3038	<	FRelation := FRelation.NextRelation;
3039	<	if not Assigned(FRelation) then
3040	<	FRelation := Add_Node(Relation, Field);
3041	<	Result := false;
3042	<	FField := FRelation.FieldNodes;
3043	<	while Assigned(FField) do
3044	<	if FField.FieldName = Field then
3045	<	begin
3046	<	Result := Ffield.COMPUTED_BLR;
3047	<	Exit;
3048	<	end
3049	<	else
3050	<	FField := Ffield.NextField;
3051	<	end;
3052	<
3053	<	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
3054	<	var
3055	<	FRelation : TRelationNode;
3056	<	FField : TFieldNode;
3057	<	begin
3058	<	FRelation := FRelationNodes;
3059	<	while Assigned(FRelation) and
3060	<	(FRelation.RelationName <> Relation) do
3061	<	FRelation := FRelation.NextRelation;
3062	<	if not Assigned(FRelation) then
3063	<	FRelation := Add_Node(Relation, Field);
3064	<	Result := false;
3065	<	FField := FRelation.FieldNodes;
3066	<	while Assigned(FField) do
3067	<	if FField.FieldName = Field then
3068	<	begin
3069	<	Result := Ffield.DEFAULT_VALUE;
3070	<	Exit;
3071	<	end
3072	<	else
3073	<	FField := Ffield.NextField;
3074	<	end;
3075	<
3076	<	Procedure FreeNodes;
3077	<	var
3078	<	FRelation : TRelationNode;
3079	<	FField : TFieldNode;
3080	<	begin
3081	<	while Assigned(FRelationNodes) do
3082	<	begin
3083	<	While Assigned(FRelationNodes.FieldNodes) do
3084	<	begin
3085	<	FField := FRelationNodes.FieldNodes.NextField;
3086	<	FRelationNodes.FieldNodes.Free;
3087	<	FRelationNodes.FieldNodes := FField;
3088	<	end;
3089	<	FRelation := FRelationNodes.NextRelation;
3090	<	FRelationNodes.Free;
3091	<	FRelationNodes := FRelation;
3092	<	end;
3093	<	end;
3094	<
3095	<	begin
3096	<	FRelationNodes := TRelationNode.Create;
3097	<	FNeedsRefresh := False;
3098	<	Database.InternalTransaction.StartTransaction;
3099	<	Query := TIBSQL.Create(self);
3100	<	try
3101	<	Query.Database := DataBase;
3102	<	Query.Transaction := Database.InternalTransaction;
3103	<	FieldDefs.BeginUpdate;
3104	<	FieldDefs.Clear;
3105	<	FieldIndex := 0;
3106	<	if (Length(FMappedFieldPosition) < SourceQuery.Current.Count) then
3107	<	SetLength(FMappedFieldPosition, SourceQuery.Current.Count);
3108	<	Query.SQL.Text := DefaultSQL;
3109	<	Query.Prepare;
3110	<	SetLength(FAliasNameMap, SourceQuery.Current.Count);
3111	<	SetLength(FAliasNameList, SourceQuery.Current.Count);
3112	<	for i := 0 to SourceQuery.Current.Count - 1 do
3113	<	with SourceQuery.Current[i].Data^ do
3114	<	begin
3115	<	{ Get the field name }
3116	<	FieldAliasName := SourceQuery.Current[i].Name;
3117	<	SetString(DBAliasName, aliasname, aliasname_length);
3118	<	SetString(RelationName, relname, relname_length);
3119	<	SetString(FieldName, sqlname, sqlname_length);
3120	<	FAliasNameList[i] := DBAliasName;
3121	<	FieldSize := 0;
3122	<	FieldPrecision := 0;
3123	<	FieldNullable := SourceQuery.Current[i].IsNullable;
3124	<	case sqltype and not 1 of
3125	<	{ All VARCHAR's must be converted to strings before recording
3126	<	their values }
3127	<	SQL_VARYING, SQL_TEXT:
3128	<	begin
3129	<	FieldSize := sqllen;
3130	<	FieldType := ftString;
3131	<	end;
3132	<	{ All Doubles/Floats should be cast to doubles }
3133	<	SQL_DOUBLE, SQL_FLOAT:
3134	<	FieldType := ftFloat;
3135	<	SQL_SHORT:
3136	<	begin
3137	<	if (sqlscale = 0) then
3138	<	FieldType := ftSmallInt
3139	<	else begin
3140	<	FieldType := ftBCD;
3141	<	FieldPrecision := 4;
3142	<	FieldSize := -sqlscale;
3143	<	end;
3144	<	end;
3145	<	SQL_LONG:
3146	<	begin
3147	<	if (sqlscale = 0) then
3148	<	FieldType := ftInteger
3149	<	else if (sqlscale >= (-4)) then
3150	<	begin
3151	<	FieldType := ftBCD;
3152	<	FieldPrecision := 9;
3153	<	FieldSize := -sqlscale;
3154	<	end
3155	<	else
3156	<	if Database.SQLDialect = 1 then
3157	<	FieldType := ftFloat
3158	<	else
3159	<	if (FieldCount > i) and (Fields[i] is TFloatField) then
3160	<	FieldType := ftFloat
3161	<	else
3162	<	begin
3163	<	FieldType := ftFMTBCD;
3164	<	FieldPrecision := 9;
3165	<	FieldSize := -sqlscale;
3166	<	end;
3167	<	end;
3168	<
3169	<	SQL_INT64:
3170	<	begin
3171	<	if (sqlscale = 0) then
3172	<	FieldType := ftLargeInt
3173	<	else if (sqlscale >= (-4)) then
3174	<	begin
3175	<	FieldType := ftBCD;
3176	<	FieldPrecision := 18;
3177	<	FieldSize := -sqlscale;
3178	<	end
3179	<	else
3180	<	FieldType := ftFloat
3181	<	end;
3182	<	SQL_TIMESTAMP: FieldType := ftDateTime;
3183	<	SQL_TYPE_TIME: FieldType := ftTime;
3184	<	SQL_TYPE_DATE: FieldType := ftDate;
3185	<	SQL_BLOB:
3186	<	begin
3187	<	FieldSize := sizeof (TISC_QUAD);
3188	<	if (sqlsubtype = 1) then
3189	<	FieldType := ftmemo
3190	<	else
3191	<	FieldType := ftBlob;
3192	<	end;
3193	<	SQL_ARRAY:
3194	<	begin
3195	<	FieldSize := sizeof (TISC_QUAD);
3196	<	FieldType := ftUnknown;
3197	<	end;
3198	<	else
3199	<	FieldType := ftUnknown;
3200	<	end;
3201	<	FieldPosition := i + 1;
3202	<	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
3203	<	begin
3204	<	FMappedFieldPosition[FieldIndex] := FieldPosition;
3205	<	Inc(FieldIndex);
3206	<	with FieldDefs.AddFieldDef do
3207	<	begin
3208	<	Name := FieldAliasName;
3209	<	FAliasNameMap[FieldNo-1] := DBAliasName;
3210	<	DataType := FieldType;
3211	<	Size := FieldSize;
3212	<	Precision := FieldPrecision;
3213	<	Required := not FieldNullable;
3214	<	InternalCalcField := False;
3215	<	if (FieldName <> '') and (RelationName <> '') then
3216	<	begin
3217	<	if Has_COMPUTED_BLR(RelationName, FieldName) then
3218	<	begin
3219	<	Attributes := [faReadOnly];
3220	<	InternalCalcField := True;
3221	<	FNeedsRefresh := True;
3222	<	end
3223	<	else
3224	<	begin
3225	<	if Has_DEFAULT_VALUE(RelationName, FieldName) then
3226	<	begin
3227	<	if not FieldNullable then
3228	<	Attributes := [faRequired];
3229	<	end
3230	<	else
3231	<	FNeedsRefresh := True;
3232	<	end;
3233	<	end;
3234	<	end;
3235	<	end;
3236	<	end;
3237	<	finally
3238	<	Query.free;
3239	<	FreeNodes;
3240	<	Database.InternalTransaction.Commit;
3241	<	FieldDefs.EndUpdate;
3242	<	end;
3243	<	end;
3244	<
3245	<	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
3246	<	begin
3247	<	CopyRecordBuffer(FModelBuffer, Buffer);
3248	<	end;
3249	<
3250	<	procedure TIBCustomDataSet.InternalLast;
3251	<	var
3252	<	Buffer: PChar;
3253	<	begin
3254	<	if (FQSelect.EOF) then
3255	<	FCurrentRecord := FRecordCount
3256	<	else begin
3257	<	Buffer := AllocRecordBuffer;
3258	<	try
3259	<	while FQSelect.Next <> nil do
3260	<	begin
3261	<	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3262	<	Inc(FRecordCount);
3263	<	end;
3264	<	FCurrentRecord := FRecordCount;
3265	<	finally
3266	<	FreeRecordBuffer(Buffer);
3267	<	end;
3268	<	end;
3269	<	end;
3270	<
3271	<	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
3272	<	var
3273	<	i: Integer;
3274	<	cur_param: TIBXSQLVAR;
3275	<	cur_field: TField;
3276	<	s: TStream;
3277	<	begin
3278	<	if FQSelect.SQL.Text = '' then
3279	<	IBError(ibxeEmptyQuery, [nil]);
3280	<	if not FInternalPrepared then
3281	<	InternalPrepare;
3282	<	if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
3283	<	begin
3284	<	for i := 0 to SQLParams.Count - 1 do
3285	<	begin
3286	<	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
3287	<	cur_param := SQLParams[i];
3288	<	if (cur_field <> nil) then begin
3289	<	if (cur_field.IsNull) then
3290	<	cur_param.IsNull := True
3291	<	else case cur_field.DataType of
3292	<	ftString:
3293	<	cur_param.AsString := cur_field.AsString;
3294	<	ftBoolean, ftSmallint, ftWord:
3295	<	cur_param.AsShort := cur_field.AsInteger;
3296	<	ftInteger:
3297	<	cur_param.AsLong := cur_field.AsInteger;
3298	<	ftLargeInt:
3299	<	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
3300	<	ftFloat, ftCurrency:
3301	<	cur_param.AsDouble := cur_field.AsFloat;
3302	<	ftBCD:
3303	<	cur_param.AsCurrency := cur_field.AsCurrency;
3304	<	ftDate:
3305	<	cur_param.AsDate := cur_field.AsDateTime;
3306	<	ftTime:
3307	<	cur_param.AsTime := cur_field.AsDateTime;
3308	<	ftDateTime:
3309	<	cur_param.AsDateTime := cur_field.AsDateTime;
3310	<	ftBlob, ftMemo:
3311	<	begin
3312	<	s := nil;
3313	<	try
3314	<	s := DataSource.DataSet.
3315	<	CreateBlobStream(cur_field, bmRead);
3316	<	cur_param.LoadFromStream(s);
3317	<	finally
3318	<	s.free;
3319	<	end;
3320	<	end;
3321	<	else
3322	<	IBError(ibxeNotSupported, [nil]);
3323	<	end;
3324	<	end;
3325	<	end;
3326	<	end;
3327	<	end;
3328	<
3329	<	procedure TIBCustomDataSet.ReQuery;
3330	<	begin
3331	<	FQSelect.Close;
3332	<	ClearBlobCache;
3333	<	FCurrentRecord := -1;
3334	<	FRecordCount := 0;
3335	<	FDeletedRecords := 0;
3336	<	FBPos := 0;
3337	<	FOBPos := 0;
3338	<	FBEnd := 0;
3339	<	FOBEnd := 0;
3340	<	FQSelect.Close;
3341	<	FQSelect.ExecQuery;
3342	<	FOpen := FQSelect.Open;
3343	<	First;
3344	<	end;
3345	<
3346	<	procedure TIBCustomDataSet.InternalOpen;
3347	<	var
3348	<	SetCursor: Boolean;
3349	<
3350	<	function RecordDataLength(n: Integer): Long;
3351	<	begin
3352	<	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
3353	<	end;
3354	<
3355	<	begin
3356	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3357	<	if SetCursor then
3358	<	Screen.Cursor := crHourGlass;
3359	<	try
3360	<	ActivateConnection;
3361	<	ActivateTransaction;
3362	<	if FQSelect.SQL.Text = '' then
3363	<	IBError(ibxeEmptyQuery, [nil]);
3364	<	if not FInternalPrepared then
3365	<	InternalPrepare;
3366	<	if FQSelect.SQLType = SQLSelect then
3367	<	begin
3368	<	if DefaultFields then
3369	<	CreateFields;
3370	<	BindFields(True);
3371	<	FCurrentRecord := -1;
3372	<	FQSelect.ExecQuery;
3373	<	FOpen := FQSelect.Open;
3374	<
3375	<	{ Initialize offsets, buffer sizes, etc...
3376	<	1. Initially FRecordSize is just the "RecordDataLength".
3377	<	2. Allocate a "model" buffer and do a dummy fetch
3378	<	3. After the dummy fetch, FRecordSize will be appropriately
3379	<	adjusted to reflect the additional "weight" of the field
3380	<	data.
3381	<	4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize.
3382	<	5. Now, with the BufferSize available, allocate memory for chunks of records
3383	<	6. Re-allocate the model buffer, accounting for the new
3384	<	FRecordBufferSize.
3385	<	7. Finally, calls to AllocRecordBuffer will work!.
3386	<	}
3387	<	{Step 1}
3388	<	FRecordSize := RecordDataLength(FQSelect.Current.Count);
3389	<	{Step 2, 3}
3390	<	IBAlloc(FModelBuffer, 0, FRecordSize);
3391	<	FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer);
3392	<	{Step 4}
3393	<	FCalcFieldsOffset := FRecordSize;
3394	<	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
3395	<	FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
3396	<	{Step 5}
3397	<	if UniDirectional then
3398	<	FBufferChunkSize := FRecordBufferSize * UniCache
3399	<	else
3400	<	FBufferChunkSize := FRecordBufferSize * BufferChunks;
3401	<	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
3402	<	if FCachedUpdates or (csReading in ComponentState) then
3403	<	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
3404	<	FBPos := 0;
3405	<	FOBPos := 0;
3406	<	FBEnd := 0;
3407	<	FOBEnd := 0;
3408	<	FCacheSize := FBufferChunkSize;
3409	<	FOldCacheSize := FBufferChunkSize;
3410	<	{Step 6}
3411	<	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count),
3412	<	FRecordBufferSize);
3413	<	{Step 7}
3414	<	FOldBuffer := AllocRecordBuffer;
3415	<	end
3416	<	else
3417	<	FQSelect.ExecQuery;
3418	<	finally
3419	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3420	<	Screen.Cursor := crDefault;
3421	<	end;
3422	<	end;
3423	<
3424	<	procedure TIBCustomDataSet.InternalPost;
3425	<	var
3426	<	Qry: TIBSQL;
3427	<	Buff: PChar;
3428	<	SetCursor: Boolean;
3429	<	bInserting: Boolean;
3430	<	begin
3431	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3432	<	if SetCursor then
3433	<	Screen.Cursor := crHourGlass;
3434	<	try
3435	<	Buff := GetActiveBuf;
3436	<	CheckEditState;
3437	<	AdjustRecordOnInsert(Buff);
3438	<	if (State = dsInsert) then
3439	<	begin
3440	<	bInserting := True;
3441	<	Qry := FQInsert;
3442	<	PRecordData(Buff)^.rdUpdateStatus := usInserted;
3443	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3444	<	WriteRecordCache(FRecordCount, Buff);
3445	<	FCurrentRecord := FRecordCount;
3446	<	end
3447	<	else begin
3448	<	bInserting := False;
3449	<	Qry := FQModify;
3450	<	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
3451	<	begin
3452	<	PRecordData(Buff)^.rdUpdateStatus := usModified;
3453	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
3454	<	end
3455	<	else if PRecordData(Buff)^.
3456	<	rdCachedUpdateStatus = cusUninserted then
3457	<	begin
3458	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3459	<	Dec(FDeletedRecords);
3460	<	end;
3461	<	end;
3462	<	if (not CachedUpdates) then
3463	<	InternalPostRecord(Qry, Buff)
3464	<	else begin
3465	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3466	<	FUpdatesPending := True;
3467	<	end;
3468	<	if bInserting then
3469	<	Inc(FRecordCount);
3470	<	finally
3471	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3472	<	Screen.Cursor := crDefault;
3473	<	end;
3474	<	end;
3475	<
3476	<	procedure TIBCustomDataSet.InternalRefresh;
3477	<	begin
3478	<	inherited InternalRefresh;
3479	<	InternalRefreshRow;
3480	<	end;
3481	<
3482	<	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
3483	<	begin
3484	<	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
3485	<	end;
3486	<
3487	<	function TIBCustomDataSet.IsCursorOpen: Boolean;
3488	<	begin
3489	<	result := FOpen;
3490	<	end;
3491	<
3492	<	procedure TIBCustomDataSet.Loaded;
3493	<	begin
3494	<	if assigned(FQSelect) then
3495	<	FBaseSQLSelect.assign(FQSelect.SQL);
3496	<	inherited Loaded;
3497	<	end;
3498	<
3499	<	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
3500	<	Options: TLocateOptions): Boolean;
3501	<	var
3502	<	{$IF FPC_FULLVERSION >= 20700 }
3503	<	CurBookmark: TBookmark;
3504	<	{$ELSE}
3505	<	CurBookmark: string;
3506	<	{$ENDIF}
3507	<	begin
3508	<	DisableControls;
3509	<	try
3510	<	CurBookmark := Bookmark;
3511	<	First;
3512	<	result := InternalLocate(KeyFields, KeyValues, Options);
3513	<	if not result then
3514	<	Bookmark := CurBookmark;
3515	<	finally
3516	<	EnableControls;
3517	<	end;
3518	<	end;
3519	<
3520	<	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
3521	<	const ResultFields: string): Variant;
3522	<	var
3523	<	fl: TList;
3524	<	{$IF FPC_FULLVERSION >= 20700 }
3525	<	CurBookmark: TBookmark;
3526	<	{$ELSE}
3527	<	CurBookmark: string;
3528	<	{$ENDIF}
3529	<	begin
3530	<	DisableControls;
3531	<	fl := TList.Create;
3532	<	CurBookmark := Bookmark;
3533	<	try
3534	<	First;
3535	<	if InternalLocate(KeyFields, KeyValues, []) then
3536	<	begin
3537	<	if (ResultFields <> '') then
3538	<	result := FieldValues[ResultFields]
3539	<	else
3540	<	result := NULL;
3541	<	end
3542	<	else
3543	<	result := Null;
3544	<	finally
3545	<	Bookmark := CurBookmark;
3546	<	fl.Free;
3547	<	EnableControls;
3548	<	end;
3549	<	end;
3550	<
3551	<	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
3552	<	begin
3553	<	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
3554	<	end;
3555	<
3556	<	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
3557	<	begin
3558	<	PRecordData(Buffer)^.rdBookmarkFlag := Value;
3559	<	end;
3560	<
3561	<	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
3562	<	begin
3563	<	if not Value and FCachedUpdates then
3564	<	CancelUpdates;
3565	<	if (not (csReading in ComponentState)) and Value then
3566	<	CheckDatasetClosed;
3567	<	FCachedUpdates := Value;
3568	<	end;
3569	<
3570	<	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
3571	<	begin
3572	<	if IsLinkedTo(Value) then
3573	<	IBError(ibxeCircularReference, [nil]);
3574	<	if FDataLink <> nil then
3575	<	FDataLink.DataSource := Value;
3576	<	end;
3577	<
3578	<	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
3579	<	var
3580	<	Buff, TmpBuff: PChar;
3581	<	MappedFieldPos: integer;
3582	<	begin
3583	<	Buff := GetActiveBuf;
3584	<	if Field.FieldNo < 0 then
3585	<	begin
3586	<	TmpBuff := Buff + FRecordSize + Field.Offset;
3587	<	Boolean(TmpBuff[0]) := LongBool(Buffer);
3588	<	if Boolean(TmpBuff[0]) then
3589	<	Move(Buffer^, TmpBuff[1], Field.DataSize);
3590	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3591	<	end
3592	<	else begin
3593	<	CheckEditState;
3594	<	with PRecordData(Buff)^ do
3595	<	begin
3596	<	{ If inserting, Adjust record position }
3597	<	AdjustRecordOnInsert(Buff);
3598	<	MappedFieldPos := FMappedFieldPosition[Field.FieldNo - 1];
3599	<	if (MappedFieldPos > 0) and
3600	<	(MappedFieldPos <= rdFieldCount) then
3601	<	begin
3602	<	Field.Validate(Buffer);
3603	<	if (Buffer = nil) or
3604	<	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
3605	<	rdFields[MappedFieldPos].fdIsNull := True
3606	<	else begin
3607	<	Move(Buffer^, Buff[rdFields[MappedFieldPos].fdDataOfs],
3608	<	rdFields[MappedFieldPos].fdDataSize);
3609	<	if (rdFields[MappedFieldPos].fdDataType = SQL_TEXT) or
3610	<	(rdFields[MappedFieldPos].fdDataType = SQL_VARYING) then
3611	<	rdFields[MappedFieldPos].fdDataLength := StrLen(PChar(Buffer));
3612	<	rdFields[MappedFieldPos].fdIsNull := False;
3613	<	if rdUpdateStatus = usUnmodified then
3614	<	begin
3615	<	if CachedUpdates then
3616	<	begin
3617	<	FUpdatesPending := True;
3618	<	if State = dsInsert then
3619	<	rdCachedUpdateStatus := cusInserted
3620	<	else if State = dsEdit then
3621	<	rdCachedUpdateStatus := cusModified;
3622	<	end;
3623	<
3624	<	if State = dsInsert then
3625	<	rdUpdateStatus := usInserted
3626	<	else
3627	<	rdUpdateStatus := usModified;
3628	<	end;
3629	<	WriteRecordCache(rdRecordNumber, Buff);
3630	<	SetModified(True);
3631	<	end;
3632	<	end;
3633	<	end;
3634	<	end;
3635	<	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
3636	<	DataEvent(deFieldChange, PtrInt(Field));
3637	<	end;
3638	<
3639	<	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
3640	<	begin
3641	<	CheckBrowseMode;
3642	<	if (Value < 1) then
3643	<	Value := 1
3644	<	else if Value > FRecordCount then
3645	<	begin
3646	<	InternalLast;
3647	<	Value := Min(FRecordCount, Value);
3648	<	end;
3649	<	if (Value <> RecNo) then
3650	<	begin
3651	<	DoBeforeScroll;
3652	<	FCurrentRecord := Value - 1;
3653	<	Resync([]);
3654	<	DoAfterScroll;
3655	<	end;
3656	<	end;
3657	<
3658	<	procedure TIBCustomDataSet.Disconnect;
3659	<	begin
3660	<	Close;
3661	<	InternalUnPrepare;
3662	<	end;
3663	<
3664	<	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
3665	<	begin
3666	<	if not CanModify then
3667	<	IBError(ibxeCannotUpdate, [nil])
3668	<	else
3669	<	FUpdateMode := Value;
3670	<	end;
3671	<
3672	<
3673	<	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
3674	<	begin
3675	<	if Value <> FUpdateObject then
3676	<	begin
3677	<	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
3678	<	FUpdateObject.DataSet := nil;
3679	<	FUpdateObject := Value;
3680	<	if Assigned(FUpdateObject) then
3681	<	begin
3682	<	if Assigned(FUpdateObject.DataSet) and
3683	<	(FUpdateObject.DataSet <> Self) then
3684	<	FUpdateObject.DataSet.UpdateObject := nil;
3685	<	FUpdateObject.DataSet := Self;
3686	<	end;
3687	<	end;
3688	<	end;
3689	<
3690	<	function TIBCustomDataSet.ConstraintsStored: Boolean;
3691	<	begin
3692	<	Result := Constraints.Count > 0;
3693	<	end;
3694	<
3695	<	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
3696	<	begin
3697	<	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
3698	<	end;
3699	<
3700	<
3701	<	procedure TIBCustomDataSet.InternalUnPrepare;
3702	<	begin
3703	<	if FInternalPrepared then
3704	<	begin
3705	<	CheckDatasetClosed;
3706	<	FieldDefs.Clear;
3707	<	FieldDefs.Updated := false;
3708	<	FInternalPrepared := False;
3709	<	Setlength(FAliasNameList,0);
3710	<	end;
3711	<	end;
3712	<
3713	<	procedure TIBCustomDataSet.InternalExecQuery;
3714	<	var
3715	<	DidActivate: Boolean;
3716	<	SetCursor: Boolean;
3717	<	begin
3718	<	DidActivate := False;
3719	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3720	<	if SetCursor then
3721	<	Screen.Cursor := crHourGlass;
3722	<	try
3723	<	ActivateConnection;
3724	<	DidActivate := ActivateTransaction;
3725	<	if FQSelect.SQL.Text = '' then
3726	<	IBError(ibxeEmptyQuery, [nil]);
3727	<	if not FInternalPrepared then
3728	<	InternalPrepare;
3729	<	if FQSelect.SQLType = SQLSelect then
3730	<	begin
3731	<	IBError(ibxeIsASelectStatement, [nil]);
3732	<	end
3733	<	else
3734	<	FQSelect.ExecQuery;
3735	<	finally
3736	<	if DidActivate then
3737	<	DeactivateTransaction;
3738	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3739	<	Screen.Cursor := crDefault;
3740	<	end;
3741	<	end;
3742	<
3743	<	function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE;
3744	<	begin
3745	<	Result := FQSelect.Handle;
3746	<	end;
3747	<
3748	<	function TIBCustomDataSet.GetParser: TSelectSQLParser;
3749	<	begin
3750	<	if not assigned(FParser) then
3751	<	FParser := CreateParser;
3752	<	Result := FParser
3753	<	end;
3754	<
3755	<	procedure TIBCustomDataSet.ResetParser;
3756	<	begin
3757	<	if assigned(FParser) then
3758	<	begin
3759	<	FParser.Free;
3760	<	FParser := nil;
3761	<	SQLChanging(nil)
3762	<	end;
3763	<	end;
3764	<
3765	<	function TIBCustomDataSet.HasParser: boolean;
3766	<	begin
3767	<	Result := not (csDesigning in ComponentState) and (FParser <> nil)
3768	<	end;
3769	<
3770	<	procedure TIBCustomDataSet.SetGenerateParamNames(AValue: Boolean);
3771	<	begin
3772	<	if FGenerateParamNames = AValue then Exit;
3773	<	FGenerateParamNames := AValue;
3774	<	Disconnect
3775	<	end;
3776	<
3777	<	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
3778	<	begin
3779	<	inherited InitRecord(Buffer);
3780	<	with PRecordData(Buffer)^ do
3781	<	begin
3782	<	rdUpdateStatus := TUpdateStatus(usInserted);
3783	<	rdBookMarkFlag := bfInserted;
3784	<	rdRecordNumber := -1;
3785	<	end;
3786	<	end;
3787	<
3788	<	procedure TIBCustomDataSet.InternalInsert;
3789	<	begin
3790	<	CursorPosChanged;
3791	<	end;
3792	<
3793	<	{ TIBDataSet IProviderSupport }
3794	<
3795	<	(*procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
3796	<	begin
3797	<	if Commit then
3798	<	Transaction.Commit else
3799	<	Transaction.Rollback;
3800	<	end;
3801	<
3802	<	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
3803	<	ResultSet: Pointer = nil): Integer;
3804	<	var
3805	<	FQuery: TIBQuery;
3806	<	begin
3807	<	if Assigned(ResultSet) then
3808	<	begin
3809	<	TDataSet(ResultSet^) := TIBQuery.Create(nil);
3810	<	with TIBQuery(ResultSet^) do
3811	<	begin
3812	<	SQL.Text := ASQL;
3813	<	Params.Assign(AParams);
3814	<	Open;
3815	<	Result := RowsAffected;
3816	<	end;
3817	<	end
3818	<	else
3819	<	begin
3820	<	FQuery := TIBQuery.Create(nil);
3821	<	try
3822	<	FQuery.Database := Database;
3823	<	FQuery.Transaction := Transaction;
3824	<	FQuery.GenerateParamNames := True;
3825	<	FQuery.SQL.Text := ASQL;
3826	<	FQuery.Params.Assign(AParams);
3827	<	FQuery.ExecSQL;
3828	<	Result := FQuery.RowsAffected;
3829	<	finally
3830	<	FQuery.Free;
3831	<	end;
3832	<	end;
3833	<	end;
3834	<
3835	<	function TIBCustomDataSet.PSGetQuoteChar: string;
3836	<	begin
3837	<	if Database.SQLDialect = 3 then
3838	<	Result := '"' else
3839	<	Result := '';
3840	<	end;
3841	<
3842	<	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
3843	<	var
3844	<	PrevErr: Integer;
3845	<	begin
3846	<	if Prev <> nil then
3847	<	PrevErr := Prev.ErrorCode else
3848	<	PrevErr := 0;
3849	<	if E is EIBError then
3850	<	with EIBError(E) do
3851	<	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
3852	<	Result := inherited PSGetUpdateException(E, Prev);
3853	<	end;
3854	<
3855	<	function TIBCustomDataSet.PSInTransaction: Boolean;
3856	<	begin
3857	<	Result := Transaction.InTransaction;
3858	<	end;
3859	<
3860	<	function TIBCustomDataSet.PSIsSQLBased: Boolean;
3861	<	begin
3862	<	Result := True;
3863	<	end;
3864	<
3865	<	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
3866	<	begin
3867	<	Result := True;
3868	<	end;
3869	<
3870	<	procedure TIBCustomDataSet.PSReset;
3871	<	begin
3872	<	inherited PSReset;
3873	<	if Active then
3874	<	begin
3875	<	Close;
3876	<	Open;
3877	<	end;
3878	<	end;
3879	<
3880	<	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
3881	<	var
3882	<	UpdateAction: TIBUpdateAction;
3883	<	SQL: string;
3884	<	Params: TParams;
3885	<
3886	<	procedure AssignParams(DataSet: TDataSet; Params: TParams);
3887	<	var
3888	<	I: Integer;
3889	<	Old: Boolean;
3890	<	Param: TParam;
3891	<	PName: string;
3892	<	Field: TField;
3893	<	Value: Variant;
3894	<	begin
3895	<	for I := 0 to Params.Count - 1 do
3896	<	begin
3897	<	Param := Params[I];
3898	<	PName := Param.Name;
3899	<	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
3900	<	if Old then System.Delete(PName, 1, 4);
3901	<	Field := DataSet.FindField(PName);
3902	<	if not Assigned(Field) then Continue;
3903	<	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
3904	<	begin
3905	<	Value := Field.NewValue;
3906	<	if VarIsEmpty(Value) then Value := Field.OldValue;
3907	<	Param.AssignFieldValue(Field, Value);
3908	<	end;
3909	<	end;
3910	<	end;
3911	<
3912	<	begin
3913	<	Result := False;
3914	<	if Assigned(OnUpdateRecord) then
3915	<	begin
3916	<	UpdateAction := uaFail;
3917	<	if Assigned(FOnUpdateRecord) then
3918	<	begin
3919	<	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
3920	<	Result := UpdateAction = uaApplied;
3921	<	end;
3922	<	end
3923	<	else if Assigned(FUpdateObject) then
3924	<	begin
3925	<	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
3926	<	if SQL <> '' then
3927	<	begin
3928	<	Params := TParams.Create;
3929	<	try
3930	<	Params.ParseSQL(SQL, True);
3931	<	AssignParams(Delta, Params);
3932	<	if PSExecuteStatement(SQL, Params) = 0 then
3933	<	IBError(ibxeNoRecordsAffected, [nil]);
3934	<	Result := True;
3935	<	finally
3936	<	Params.Free;
3937	<	end;
3938	<	end;
3939	<	end;
3940	<	end;
3941	<
3942	<	procedure TIBCustomDataSet.PSStartTransaction;
3943	<	begin
3944	<	ActivateConnection;
3945	<	Transaction.StartTransaction;
3946	<	end;
3947	<
3948	<	function TIBCustomDataSet.PSGetTableName: string;
3949	<	begin
3950	<	//  if not FInternalPrepared then
3951	<	//    InternalPrepare;
3952	<	{ It is possible for the FQSelectSQL to be unprepared
3953	<	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
3954	<	So check the Prepared of the SelectSQL instead }
3955	<	if not FQSelect.Prepared then
3956	<	FQSelect.Prepare;
3957	<	Result := FQSelect.UniqueRelationName;
3958	<	end;*)
3959	<
3960	<	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
3961	<	begin
3962	<	InternalBatchInput(InputObject);
3963	<	end;
3964	<
3965	<	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
3966	<	begin
3967	<	InternalBatchOutput(OutputObject);
3968	<	end;
3969	<
3970	<	procedure TIBDataSet.ExecSQL;
3971	<	begin
3972	<	InternalExecQuery;
3973	<	end;
3974	<
3975	<	procedure TIBDataSet.Prepare;
3976	<	begin
3977	<	InternalPrepare;
3978	<	end;
3979	<
3980	<	procedure TIBDataSet.UnPrepare;
3981	<	begin
3982	<	InternalUnPrepare;
3983	<	end;
3984	<
3985	<	function TIBDataSet.GetPrepared: Boolean;
3986	<	begin
3987	<	Result := InternalPrepared;
3988	<	end;
3989	<
3990	<	procedure TIBDataSet.InternalOpen;
3991	<	begin
3992	<	ActivateConnection;
3993	<	ActivateTransaction;
3994	<	InternalSetParamsFromCursor;
3995	<	Inherited InternalOpen;
3996	<	end;
3997	<
3998	<	procedure TIBDataSet.SetFiltered(Value: Boolean);
3999	<	begin
4000	<	if(Filtered <> Value) then
4001	<	begin
4002	<	inherited SetFiltered(value);
4003	<	if Active then
4004	<	begin
4005	<	Close;
4006	<	Open;
4007	<	end;
4008	<	end
4009	<	else
4010	<	inherited SetFiltered(value);
4011	<	end;
4012	<
4013	<	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
4014	<	begin
4015	<	Result := false;
4016	<	if not Assigned(Bookmark) then
4017	<	exit;
4018	<	Result := PInteger(Bookmark)^ < FRecordCount;
4019	<	end;
4020	<
4021	<	function TIBCustomDataSet.GetFieldData(Field: TField;
4022	<	Buffer: Pointer): Boolean;
4023	<	{$IFDEF TBCDFIELD_IS_BCD}
4024	<	var
4025	<	lTempCurr : System.Currency;
4026	<	begin
4027	<	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4028	<	begin
4029	<	Result := InternalGetFieldData(Field, @lTempCurr);
4030	<	if Result then
4031	<	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
4032	<	end
4033	<	else
4034	<	{$ELSE}
4035	<	begin
4036	<	{$ENDIF}
4037	<	Result := InternalGetFieldData(Field, Buffer);
4038	<	end;
4039	<
4040	<	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
4041	<	NativeFormat: Boolean): Boolean;
4042	<	begin
4043	<	if (Field.DataType = ftBCD) and not NativeFormat then
4044	<	Result := InternalGetFieldData(Field, Buffer)
4045	<	else
4046	<	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
4047	<	end;
4048	<
4049	<	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
4050	<	{$IFDEF TDBDFIELD_IS_BCD}
4051	<	var
4052	<	lTempCurr : System.Currency;
4053	<	begin
4054	<	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4055	<	begin
4056	<	BCDToCurr(TBCD(Buffer^), lTempCurr);
4057	<	InternalSetFieldData(Field, @lTempCurr);
4058	<	end
4059	<	else
4060	<	{$ELSE}
4061	<	begin
4062	<	{$ENDIF}
4063	<	InternalSetFieldData(Field, Buffer);
4064	<	end;
4065	<
4066	<	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
4067	<	NativeFormat: Boolean);
4068	<	begin
4069	<	if (not NativeFormat) and (Field.DataType = ftBCD) then
4070	<	InternalSetfieldData(Field, Buffer)
4071	<	else
4072	<	inherited SetFieldData(Field, buffer, NativeFormat);
4073	<	end;
4074	<
4075	<	{ TIBDataSetUpdateObject }
4076	<
4077	<	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
4078	<	begin
4079	<	inherited Create(AOwner);
4080	<	FRefreshSQL := TStringList.Create;
4081	<	end;
4082	<
4083	<	destructor TIBDataSetUpdateObject.Destroy;
4084	<	begin
4085	<	FRefreshSQL.Free;
4086	<	inherited Destroy;
4087	<	end;
4088	<
4089	<	procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings);
4090	<	begin
4091	<	FRefreshSQL.Assign(Value);
4092	<	end;
4093	<
4094	<	procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
4095	<	begin
4096	<	if not Assigned(DataSet) then Exit;
4097	<	DataSet.SetInternalSQLParams(Query, buff);
4098	<	end;
4099	<
4100	<	{ TIBDSBlobStream }
4101	<	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
4102	<	Mode: TBlobStreamMode);
4103	<	begin
4104	<	FField := AField;
4105	<	FBlobStream := ABlobStream;
4106	<	FBlobStream.Seek(0, soFromBeginning);
4107	<	if (Mode = bmWrite) then
4108	<	FBlobStream.Truncate;
4109	<	end;
4110	<
4111	<	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
4112	<	begin
4113	<	result := FBlobStream.Read(Buffer, Count);
4114	<	end;
4115	<
4116	<	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
4117	<	begin
4118	<	result := FBlobStream.Seek(Offset, Origin);
4119	<	end;
4120	<
4121	<	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
4122	<	begin
4123	<	FBlobStream.SetSize(NewSize);
4124	<	end;
4125	<
4126	<	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
4127	<	begin
4128	<	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
4129	<	IBError(ibxeNotEditing, [nil]);
4130	<	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4131	<	TBlobField(FField).Modified := true;
4132	<	result := FBlobStream.Write(Buffer, Count);
4133	<	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4134	<	end;
4135	<
4136	<	{ TIBGenerator }
4137	<
4138	<	procedure TIBGenerator.SetIncrement(const AValue: integer);
4139	<	begin
4140	<	if AValue < 0 then
4141	<	raise Exception.Create('A Generator Increment cannot be negative');
4142	<	FIncrement := AValue
4143	<	end;
4144	<
4145	<	function TIBGenerator.GetNextValue(ADatabase: TIBDatabase;
4146	<	ATransaction: TIBTransaction): integer;
4147	<	begin
4148	<	with TIBSQL.Create(nil) do
4149	<	try
4150	<	Database := ADatabase;
4151	<	Transaction := ATransaction;
4152	<	if not assigned(Database) then
4153	<	IBError(ibxeCannotSetDatabase,[]);
4154	<	if not assigned(Transaction) then
4155	<	IBError(ibxeCannotSetTransaction,[]);
4156	<	with Transaction do
4157	<	if not InTransaction then StartTransaction;
4158	<	SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]);
4159	<	Prepare;
4160	<	ExecQuery;
4161	<	try
4162	<	Result := FieldByName('ID').AsInteger
4163	<	finally
4164	<	Close
4165	<	end;
4166	<	finally
4167	<	Free
4168	<	end;
4169	<	end;
4170	<
4171	<	constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
4172	<	begin
4173	<	FOwner := Owner;
4174	<	FIncrement := 1;
4175	<	end;
4176	<
4177	<
4178	<	procedure TIBGenerator.Apply;
4179	<	begin
4180	<	if (FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then
4181	<	Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction);
4182	<	end;
4183	<
4184	<	end.
1	>	{************************************************************************}
2	>	{                                                                        }
3	>	{       Borland Delphi Visual Component Library                          }
4	>	{       InterBase Express core components                                }
5	>	{                                                                        }
6	>	{       Copyright (c) 1998-2000 Inprise Corporation                      }
7	>	{                                                                        }
8	>	{    InterBase Express is based in part on the product                   }
9	>	{    Free IB Components, written by Gregory H. Deatz for                 }
10	>	{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
11	>	{    Free IB Components is used under license.                           }
12	>	{                                                                        }
13	>	{    The contents of this file are subject to the InterBase              }
14	>	{    Public License Version 1.0 (the "License"); you may not             }
15	>	{    use this file except in compliance with the License. You            }
16	>	{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	>	{    Software distributed under the License is distributed on            }
18	>	{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
19	>	{    express or implied. See the License for the specific language       }
20	>	{    governing rights and limitations under the License.                 }
21	>	{    The Original Code was created by InterBase Software Corporation     }
22	>	{       and its successors.                                              }
23	>	{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
24	>	{       Corporation. All Rights Reserved.                                }
25	>	{    Contributor(s): Jeff Overcash                                       }
26	>	{                                                                        }
27	>	{    IBX For Lazarus (Firebird Express)                                  }
28	>	{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	>	{    Portions created by MWA Software are copyright McCallum Whyman      }
30	>	{    Associates Ltd 2011 - 2015                                                }
31	>	{                                                                        }
32	>	{************************************************************************}
33	>
34	>	unit IBCustomDataSet;
35	>
36	>	{$IF FPC_FULLVERSION >= 20700 }
37	>	{$codepage UTF8}
38	>	{$DEFINE HAS_ANSISTRING_CODEPAGE}
39	>	{$DEFINE NEW_TBOOKMARK}
40	>	{$ENDIF}
41	>
42	>	{$R-}
43	>
44	>	{$Mode Delphi}
45	>
46	>	{$IFDEF DELPHI}
47	>	{$DEFINE TDBDFIELD_IS_BCD}
48	>	{$ENDIF}
49	>
50	>	interface
51	>
52	>	uses
53	>	{$IFDEF WINDOWS }
54	>	Windows,
55	>	{$ELSE}
56	>	unix,
57	>	{$ENDIF}
58	>	SysUtils, Classes, IBDatabase, IBExternals, IB, IBHeader,  IBSQL, Db,
59	>	IBUtils, IBBlob, IBSQLParser;
60	>
61	>	const
62	>	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
63	>	UniCache           =  2;     { Uni-directional cache is 2 records big }
64	>
65	>	type
66	>	TIBCustomDataSet = class;
67	>	TIBDataSet = class;
68	>
69	>	{ TIBDataSetUpdateObject }
70	>
71	>	TIBDataSetUpdateObject = class(TComponent)
72	>	private
73	>	FRefreshSQL: TStrings;
74	>	procedure SetRefreshSQL(value: TStrings);
75	>	protected
76	>	function GetDataSet: TIBCustomDataSet; virtual; abstract;
77	>	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
78	>	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
79	>	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
80	>	procedure InternalSetParams(Query: TIBSQL; buff: PChar);
81	>	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
82	>	public
83	>	constructor Create(AOwner: TComponent); override;
84	>	destructor Destroy; override;
85	>	published
86	>	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
87	>	end;
88	>
89	>	TBlobDataArray = array[0..0] of TIBBlobStream;
90	>	PBlobDataArray = ^TBlobDataArray;
91	>
92	>	{ TIBCustomDataSet }
93	>	TFieldData = record
94	>	fdDataType: Short;
95	>	fdDataScale: Short;
96	>	fdNullable: Boolean;
97	>	fdIsNull: Boolean;
98	>	fdDataSize: Short;
99	>	fdDataLength: Short;
100	>	fdDataOfs: Integer;
101	>	end;
102	>	PFieldData = ^TFieldData;
103	>
104	>	TCachedUpdateStatus = (
105	>	cusUnmodified, cusModified, cusInserted,
106	>	cusDeleted, cusUninserted
107	>	);
108	>	TIBDBKey = record
109	>	DBKey: array[0..7] of Byte;
110	>	end;
111	>	PIBDBKey = ^TIBDBKey;
112	>
113	>	TRecordData = record
114	>	rdBookmarkFlag: TBookmarkFlag;
115	>	rdFieldCount: Short;
116	>	rdRecordNumber: Integer;
117	>	rdCachedUpdateStatus: TCachedUpdateStatus;
118	>	rdUpdateStatus: TUpdateStatus;
119	>	rdSavedOffset: DWORD;
120	>	rdDBKey: TIBDBKey;
121	>	rdFields: array[1..1] of TFieldData;
122	>	end;
123	>	PRecordData = ^TRecordData;
124	>
125	>	{ TIBStringField allows us to have strings longer than 8196 }
126	>
127	>	TIBStringField = class(TStringField)
128	>	private
129	>	FCharacterSetName: RawByteString;
130	>	FCharacterSetSize: integer;
131	>	protected
132	>	function GetDefaultWidth: Longint; override;
133	>	public
134	>	constructor Create(aOwner: TComponent); override;
135	>	class procedure CheckTypeSize(Value: Integer); override;
136	>	function GetAsString: string; override;
137	>	function GetAsVariant: Variant; override;
138	>	function GetValue(var Value: string): Boolean;
139	>	procedure SetAsString(const Value: string); override;
140	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
141	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
142	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
143	>	private
144	>	FCodePage: TSystemCodePage;
145	>	public
146	>	property CodePage: TSystemCodePage read FCodePage write FCodePage;
147	>	{$ENDIF}
148	>	end;
149	>
150	>	{ TIBWideStringField }
151	>
152	>	TIBWideStringField = class(TWideStringField)
153	>	private
154	>	FCharacterSetName: RawByteString;
155	>	FCharacterSetSize: integer;
156	>	public
157	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
158	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
159	>	end;
160	>
161	>	{ TIBBCDField }
162	>	{  Actually, there is no BCD involved in this type,
163	>	instead it deals with currency types.
164	>	In IB, this is an encapsulation of Numeric (x, y)
165	>	where x < 18 and y <= 4.
166	>	Note: y > 4 will default to Floats
167	>	}
168	>	TIBBCDField = class(TBCDField)
169	>	protected
170	>	class procedure CheckTypeSize(Value: Integer); override;
171	>	function GetAsCurrency: Currency; override;
172	>	function GetAsString: string; override;
173	>	function GetAsVariant: Variant; override;
174	>	function GetDataSize: Integer; override;
175	>	public
176	>	constructor Create(AOwner: TComponent); override;
177	>	published
178	>	property Size default 8;
179	>	end;
180	>
181	>	{TIBMemoField}
182	>	{Allows us to show truncated text in DBGrids and anything else that uses
183	>	DisplayText}
184	>
185	>	TIBMemoField = class(TMemoField)
186	>	private
187	>	FCharacterSetName: RawByteString;
188	>	FCharacterSetSize: integer;
189	>	FDisplayTextAsClassName: boolean;
190	>	function GetTruncatedText: string;
191	>	protected
192	>	function GetAsString: string; override;
193	>	function GetDefaultWidth: Longint; override;
194	>	procedure GetText(var AText: string; ADisplayText: Boolean); override;
195	>	procedure SetAsString(const AValue: string); override;
196	>	public
197	>	constructor Create(AOwner: TComponent); override;
198	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
199	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
200	>	published
201	>	property DisplayTextAsClassName: boolean read FDisplayTextAsClassName
202	>	write FDisplayTextAsClassName;
203	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
204	>	private
205	>	FCodePage: TSystemCodePage;
206	>	FFCodePage: TSystemCodePage;
207	>	public
208	>	property CodePage: TSystemCodePage read FFCodePage write FFCodePage;
209	>	{$ENDIF}
210	>	end;
211	>
212	>	{ TIBWideMemoField }
213	>
214	>	TIBWideMemoField = class(TWideMemoField)
215	>	private
216	>	FCharacterSetName: RawByteString;
217	>	FCharacterSetSize: integer;
218	>	FDisplayTextAsClassName: boolean;
219	>	function GetTruncatedText: string;
220	>	protected
221	>	function GetDefaultWidth: Longint; override;
222	>	procedure GetText(var AText: string; ADisplayText: Boolean); override;
223	>	public
224	>	constructor Create(AOwner: TComponent); override;
225	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
226	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
227	>	published
228	>	property DisplayTextAsClassName: boolean read FDisplayTextAsClassName
229	>	write FDisplayTextAsClassName;
230	>	end;
231	>
232	>	TIBDataLink = class(TDetailDataLink)
233	>	private
234	>	FDataSet: TIBCustomDataSet;
235	>	protected
236	>	procedure ActiveChanged; override;
237	>	procedure RecordChanged(Field: TField); override;
238	>	function GetDetailDataSet: TDataSet; override;
239	>	procedure CheckBrowseMode; override;
240	>	public
241	>	constructor Create(ADataSet: TIBCustomDataSet);
242	>	destructor Destroy; override;
243	>	end;
244	>
245	>	TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord);
246	>
247	>	{ TIBGenerator }
248	>
249	>	TIBGenerator = class(TPersistent)
250	>	private
251	>	FOwner: TIBCustomDataSet;
252	>	FApplyOnEvent: TIBGeneratorApplyOnEvent;
253	>	FFieldName: string;
254	>	FGeneratorName: string;
255	>	FIncrement: integer;
256	>	procedure SetIncrement(const AValue: integer);
257	>	protected
258	>	function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer;
259	>	public
260	>	constructor Create(Owner: TIBCustomDataSet);
261	>	procedure Apply;
262	>	property Owner: TIBCustomDataSet read FOwner;
263	>	published
264	>	property Generator: string read FGeneratorName write FGeneratorName;
265	>	property Field: string read FFieldName write FFieldName;
266	>	property Increment: integer read FIncrement write SetIncrement default 1;
267	>	property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
268	>	end;
269	>
270	>	{TIBControlLink - Allows IB Aware controls to react to dataset state changes}
271	>
272	>	TIBControlLink = class
273	>	private
274	>	FTIBDataSet: TIBCustomDataSet;
275	>	procedure SetIBDataSet(AValue: TIBCustomDataSet);
276	>	protected
277	>	procedure UpdateSQL(Sender: TObject); virtual;
278	>	procedure UpdateParams(Sender: TObject); virtual;
279	>	public
280	>	destructor Destroy; override;
281	>	property IBDataSet: TIBCustomDataSet read FTIBDataSet write SetIBDataSet;
282	>	end;
283	>
284	>	TIBAutoCommit = (acDisabled, acCommitRetaining);
285	>
286	>	{ TIBCustomDataSet }
287	>	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
288	>
289	>	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
290	>	UpdateKind: TUpdateKind; var TheUpdateAction: TIBUpdateAction)
291	>	of object;
292	>	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
293	>	var UpdateAction: TIBUpdateAction) of object;
294	>
295	>	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
296	>
297	>	TDataSetCloseAction = (dcDiscardChanges, dcSaveChanges);
298	>
299	>	TOnValidatePost = procedure (Sender: TObject; var CancelPost: boolean) of object;
300	>
301	>	TIBCustomDataSet = class(TDataset)
302	>	private
303	>	FAutoCommit: TIBAutoCommit;
304	>	FGenerateParamNames: Boolean;
305	>	FGeneratorField: TIBGenerator;
306	>	FNeedsRefresh: Boolean;
307	>	FForcedRefresh: Boolean;
308	>	FDidActivate: Boolean;
309	>	FIBLoaded: Boolean;
310	>	FBase: TIBBase;
311	>	FBlobCacheOffset: Integer;
312	>	FBlobStreamList: TList;
313	>	FBufferChunks: Integer;
314	>	FBufferCache,
315	>	FOldBufferCache: PChar;
316	>	FBufferChunkSize,
317	>	FCacheSize,
318	>	FOldCacheSize: Integer;
319	>	FFilterBuffer: PChar;
320	>	FBPos,
321	>	FOBPos,
322	>	FBEnd,
323	>	FOBEnd: DWord;
324	>	FCachedUpdates: Boolean;
325	>	FCalcFieldsOffset: Integer;
326	>	FCurrentRecord: Long;
327	>	FDeletedRecords: Long;
328	>	FModelBuffer,
329	>	FOldBuffer: PChar;
330	>	FOnValidatePost: TOnValidatePost;
331	>	FOpen: Boolean;
332	>	FInternalPrepared: Boolean;
333	>	FQDelete,
334	>	FQInsert,
335	>	FQRefresh,
336	>	FQSelect,
337	>	FQModify: TIBSQL;
338	>	FRecordBufferSize: Integer;
339	>	FRecordCount: Integer;
340	>	FRecordSize: Integer;
341	>	FDataSetCloseAction: TDataSetCloseAction;
342	>	FUniDirectional: Boolean;
343	>	FUpdateMode: TUpdateMode;
344	>	FUpdateObject: TIBDataSetUpdateObject;
345	>	FParamCheck: Boolean;
346	>	FUpdatesPending: Boolean;
347	>	FUpdateRecordTypes: TIBUpdateRecordTypes;
348	>	FMappedFieldPosition: array of Integer;
349	>	FDataLink: TIBDataLink;
350	>
351	>	FBeforeDatabaseDisconnect,
352	>	FAfterDatabaseDisconnect,
353	>	FDatabaseFree: TNotifyEvent;
354	>	FOnUpdateError: TIBUpdateErrorEvent;
355	>	FOnUpdateRecord: TIBUpdateRecordEvent;
356	>	FBeforeTransactionEnd,
357	>	FAfterTransactionEnd,
358	>	FTransactionFree: TNotifyEvent;
359	>	FAliasNameMap: array of string;
360	>	FAliasNameList: array of string;
361	>	FBaseSQLSelect: TStrings;
362	>	FParser: TSelectSQLParser;
363	>	FCloseAction: TTransactionAction;
364	>	FInTransactionEnd: boolean;
365	>	FIBLinks: TList;
366	>	function GetSelectStmtHandle: TISC_STMT_HANDLE;
367	>	procedure SetUpdateMode(const Value: TUpdateMode);
368	>	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
369	>
370	>	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
371	>	procedure AdjustRecordOnInsert(Buffer: Pointer);
372	>	function CanEdit: Boolean;
373	>	function CanInsert: Boolean;
374	>	function CanDelete: Boolean;
375	>	function CanRefresh: Boolean;
376	>	procedure CheckEditState;
377	>	procedure ClearBlobCache;
378	>	procedure ClearIBLinks;
379	>	procedure CopyRecordBuffer(Source, Dest: Pointer);
380	>	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
381	>	procedure DoAfterDatabaseDisconnect(Sender: TObject);
382	>	procedure DoDatabaseFree(Sender: TObject);
383	>	procedure DoBeforeTransactionEnd(Sender: TObject; Action: TTransactionAction);
384	>	procedure DoAfterTransactionEnd(Sender: TObject);
385	>	procedure DoTransactionFree(Sender: TObject);
386	>	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
387	>	Buffer: PChar);
388	>	function GetDatabase: TIBDatabase;
389	>	function GetDBHandle: PISC_DB_HANDLE;
390	>	function GetDeleteSQL: TStrings;
391	>	function GetInsertSQL: TStrings;
392	>	function GetSQLParams: TIBXSQLDA;
393	>	function GetRefreshSQL: TStrings;
394	>	function GetSelectSQL: TStrings;
395	>	function GetStatementType: TIBSQLTypes;
396	>	function GetModifySQL: TStrings;
397	>	function GetTransaction: TIBTransaction;
398	>	function GetTRHandle: PISC_TR_HANDLE;
399	>	function GetParser: TSelectSQLParser;
400	>	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
401	>	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
402	>	Options: TLocateOptions): Boolean; virtual;
403	>	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
404	>	procedure InternalRevertRecord(RecordNumber: Integer); virtual;
405	>	function IsVisible(Buffer: PChar): Boolean;
406	>	procedure RegisterIBLink(Sender: TIBControlLink);
407	>	procedure UnRegisterIBLink(Sender: TIBControlLink);
408	>	procedure SaveOldBuffer(Buffer: PChar);
409	>	procedure SetBufferChunks(Value: Integer);
410	>	procedure SetDatabase(Value: TIBDatabase);
411	>	procedure SetDeleteSQL(Value: TStrings);
412	>	procedure SetInsertSQL(Value: TStrings);
413	>	procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
414	>	procedure SetRefreshSQL(Value: TStrings);
415	>	procedure SetSelectSQL(Value: TStrings);
416	>	procedure SetModifySQL(Value: TStrings);
417	>	procedure SetTransaction(Value: TIBTransaction);
418	>	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
419	>	procedure SetUniDirectional(Value: Boolean);
420	>	procedure RefreshParams;
421	>	function AdjustPosition(FCache: PChar; Offset: DWORD;
422	>	Origin: Integer): DWORD;
423	>	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
424	>	Buffer: PChar);
425	>	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
426	>	ReadOldBuffer: Boolean);
427	>	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
428	>	Buffer: PChar);
429	>	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
430	>	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
431	>	DoCheck: Boolean): TGetResult; virtual;
432	>
433	>	protected
434	>	procedure ActivateConnection;
435	>	function ActivateTransaction: Boolean;
436	>	procedure DeactivateTransaction;
437	>	procedure CheckDatasetClosed;
438	>	procedure CheckDatasetOpen;
439	>	function CreateParser: TSelectSQLParser; virtual;
440	>	procedure FieldDefsFromQuery(SourceQuery: TIBSQL);
441	>	function GetActiveBuf: PChar;
442	>	procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
443	>	procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
444	>	procedure InternalPrepare; virtual;
445	>	procedure InternalUnPrepare; virtual;
446	>	procedure InternalExecQuery; virtual;
447	>	procedure InternalRefreshRow; virtual;
448	>	procedure InternalSetParamsFromCursor; virtual;
449	>	procedure CheckNotUniDirectional;
450	>	procedure SQLChanging(Sender: TObject); virtual;
451	>	procedure SQLChanged(Sender: TObject); virtual;
452	>
453	>	(*    { IProviderSupport }
454	>	procedure PSEndTransaction(Commit: Boolean); override;
455	>	function PSExecuteStatement(const ASQL: string; AParams: TParams;
456	>	ResultSet: Pointer = nil): Integer; override;
457	>	function PsGetTableName: string; override;
458	>	function PSGetQuoteChar: string; override;
459	>	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
460	>	function PSInTransaction: Boolean; override;
461	>	function PSIsSQLBased: Boolean; override;
462	>	function PSIsSQLSupported: Boolean; override;
463	>	procedure PSStartTransaction; override;
464	>	procedure PSReset; override;
465	>	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
466	>	*)
467	>	{ TDataSet support }
468	>	procedure InternalInsert; override;
469	>	procedure InitRecord(Buffer: PChar); override;
470	>	procedure Disconnect; virtual;
471	>	function ConstraintsStored: Boolean;
472	>	procedure ClearCalcFields(Buffer: PChar); override;
473	>	function AllocRecordBuffer: PChar; override;
474	>	procedure DoBeforeDelete; override;
475	>	procedure DoAfterDelete; override;
476	>	procedure DoBeforeEdit; override;
477	>	procedure DoAfterEdit; override;
478	>	procedure DoBeforeInsert; override;
479	>	procedure DoAfterInsert; override;
480	>	procedure DoBeforeClose; override;
481	>	procedure DoBeforeOpen; override;
482	>	procedure DoBeforePost; override;
483	>	procedure DoAfterPost; override;
484	>	procedure FreeRecordBuffer(var Buffer: PChar); override;
485	>	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
486	>	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
487	>	function GetCanModify: Boolean; override;
488	>	function GetDataSource: TDataSource; override;
489	>	function GetDBAliasName(FieldNo: integer): string;
490	>	function GetFieldDefFromAlias(aliasName: string): TFieldDef;
491	>	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
492	>	function GetRecNo: Integer; override;
493	>	function GetRecord(Buffer: PChar; GetMode: TGetMode;
494	>	DoCheck: Boolean): TGetResult; override;
495	>	function GetRecordCount: Integer; override;
496	>	function GetRecordSize: Word; override;
497	>	procedure InternalAutoCommit;
498	>	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
499	>	procedure InternalCancel; override;
500	>	procedure InternalClose; override;
501	>	procedure InternalDelete; override;
502	>	procedure InternalFirst; override;
503	>	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
504	>	procedure InternalGotoBookmark(Bookmark: Pointer); override;
505	>	procedure InternalHandleException; override;
506	>	procedure InternalInitFieldDefs; override;
507	>	procedure InternalInitRecord(Buffer: PChar); override;
508	>	procedure InternalLast; override;
509	>	procedure InternalOpen; override;
510	>	procedure InternalPost; override;
511	>	procedure InternalRefresh; override;
512	>	procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
513	>	procedure InternalSetToRecord(Buffer: PChar); override;
514	>	function IsCursorOpen: Boolean; override;
515	>	procedure Loaded; override;
516	>	procedure ReQuery;
517	>	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
518	>	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
519	>	procedure SetCachedUpdates(Value: Boolean);
520	>	procedure SetDataSource(Value: TDataSource);
521	>	procedure SetGenerateParamNames(AValue: Boolean); virtual;
522	>	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
523	>	procedure SetFieldData(Field : TField; Buffer : Pointer;
524	>	NativeFormat : Boolean); overload; override;
525	>	procedure SetRecNo(Value: Integer); override;
526	>
527	>	protected
528	>	{Likely to be made public by descendant classes}
529	>	property AutoCommit: TIBAutoCommit read FAutoCommit write FAutoCommit default acDisabled;
530	>	property SQLParams: TIBXSQLDA read GetSQLParams;
531	>	property Params: TIBXSQLDA read GetSQLParams;
532	>	property InternalPrepared: Boolean read FInternalPrepared;
533	>	property QDelete: TIBSQL read FQDelete;
534	>	property QInsert: TIBSQL read FQInsert;
535	>	property QRefresh: TIBSQL read FQRefresh;
536	>	property QSelect: TIBSQL read FQSelect;
537	>	property QModify: TIBSQL read FQModify;
538	>	property StatementType: TIBSQLTypes read GetStatementType;
539	>	property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle;
540	>
541	>	{Likely to be made published by descendant classes}
542	>	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
543	>	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
544	>	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
545	>	property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
546	>	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
547	>	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
548	>	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
549	>	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
550	>	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
551	>	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
552	>	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
553	>	property Parser: TSelectSQLParser read GetParser;
554	>	property BaseSQLSelect: TStrings read FBaseSQLSelect;
555	>
556	>	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
557	>	write FBeforeDatabaseDisconnect;
558	>	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
559	>	write FAfterDatabaseDisconnect;
560	>	property DatabaseFree: TNotifyEvent read FDatabaseFree
561	>	write FDatabaseFree;
562	>	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
563	>	write FBeforeTransactionEnd;
564	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
565	>	write FAfterTransactionEnd;
566	>	property TransactionFree: TNotifyEvent read FTransactionFree
567	>	write FTransactionFree;
568	>	property OnValidatePost: TOnValidatePost read FOnValidatePost write FOnValidatePost;
569	>
570	>	public
571	>	constructor Create(AOwner: TComponent); override;
572	>	destructor Destroy; override;
573	>	procedure ApplyUpdates;
574	>	function CachedUpdateStatus: TCachedUpdateStatus;
575	>	procedure CancelUpdates;
576	>	function GetFieldPosition(AliasName: string): integer;
577	>	procedure FetchAll;
578	>	function LocateNext(const KeyFields: string; const KeyValues: Variant;
579	>	Options: TLocateOptions): Boolean;
580	>	procedure RecordModified(Value: Boolean);
581	>	procedure RevertRecord;
582	>	procedure Undelete;
583	>	procedure ResetParser; virtual;
584	>	function HasParser: boolean;
585	>
586	>	{ TDataSet support methods }
587	>	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
588	>	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
589	>	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
590	>	function GetCurrentRecord(Buffer: PChar): Boolean; override;
591	>	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
592	>	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
593	>	function GetFieldData(Field : TField; Buffer : Pointer;
594	>	NativeFormat : Boolean) : Boolean; overload; override;
595	>	property GenerateParamNames: Boolean read FGenerateParamNames write SetGenerateParamNames;
596	>	function Locate(const KeyFields: string; const KeyValues: Variant;
597	>	Options: TLocateOptions): Boolean; override;
598	>	function Lookup(const KeyFields: string; const KeyValues: Variant;
599	>	const ResultFields: string): Variant; override;
600	>	function UpdateStatus: TUpdateStatus; override;
601	>	function IsSequenced: Boolean; override;
602	>	procedure Post; override;
603	>	function ParamByName(ParamName: String): TIBXSQLVAR;
604	>	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
605	>	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
606	>	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
607	>	property UpdatesPending: Boolean read FUpdatesPending;
608	>	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
609	>	write SetUpdateRecordTypes;
610	>	property DataSetCloseAction: TDataSetCloseAction
611	>	read FDataSetCloseAction write FDataSetCloseAction;
612	>
613	>	published
614	>	property Database: TIBDatabase read GetDatabase write SetDatabase;
615	>	property Transaction: TIBTransaction read GetTransaction
616	>	write SetTransaction;
617	>	property ForcedRefresh: Boolean read FForcedRefresh
618	>	write FForcedRefresh default False;
619	>	property AutoCalcFields;
620	>
621	>	property AfterCancel;
622	>	property AfterClose;
623	>	property AfterDelete;
624	>	property AfterEdit;
625	>	property AfterInsert;
626	>	property AfterOpen;
627	>	property AfterPost;
628	>	property AfterRefresh;
629	>	property AfterScroll;
630	>	property BeforeCancel;
631	>	property BeforeClose;
632	>	property BeforeDelete;
633	>	property BeforeEdit;
634	>	property BeforeInsert;
635	>	property BeforeOpen;
636	>	property BeforePost;
637	>	property BeforeRefresh;
638	>	property BeforeScroll;
639	>	property OnCalcFields;
640	>	property OnDeleteError;
641	>	property OnEditError;
642	>	property OnNewRecord;
643	>	property OnPostError;
644	>	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
645	>	write FOnUpdateError;
646	>	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
647	>	write FOnUpdateRecord;
648	>	end;
649	>
650	>	TIBParserDataSet = class(TIBCustomDataSet)
651	>	public
652	>	property Parser;
653	>	end;
654	>
655	>	TIBDataSet = class(TIBParserDataSet)
656	>	private
657	>	function GetPrepared: Boolean;
658	>
659	>	protected
660	>	procedure SetFiltered(Value: Boolean); override;
661	>	procedure InternalOpen; override;
662	>
663	>	public
664	>	procedure Prepare;
665	>	procedure UnPrepare;
666	>	procedure BatchInput(InputObject: TIBBatchInput);
667	>	procedure BatchOutput(OutputObject: TIBBatchOutput);
668	>	procedure ExecSQL;
669	>
670	>	public
671	>	property Params;
672	>	property Prepared : Boolean read GetPrepared;
673	>	property QDelete;
674	>	property QInsert;
675	>	property QRefresh;
676	>	property QSelect;
677	>	property QModify;
678	>	property StatementType;
679	>	property SelectStmtHandle;
680	>	property BaseSQLSelect;
681	>
682	>	published
683	>	{ TIBCustomDataSet }
684	>	property AutoCommit;
685	>	property BufferChunks;
686	>	property CachedUpdates;
687	>	property DeleteSQL;
688	>	property InsertSQL;
689	>	property RefreshSQL;
690	>	property SelectSQL;
691	>	property ModifySQL;
692	>	property GeneratorField;
693	>	property GenerateParamNames;
694	>	property ParamCheck;
695	>	property UniDirectional;
696	>	property Filtered;
697	>	property DataSetCloseAction;
698	>
699	>	property BeforeDatabaseDisconnect;
700	>	property AfterDatabaseDisconnect;
701	>	property DatabaseFree;
702	>	property BeforeTransactionEnd;
703	>	property AfterTransactionEnd;
704	>	property TransactionFree;
705	>
706	>	{ TIBDataSet }
707	>	property Active;
708	>	property AutoCalcFields;
709	>	property DataSource read GetDataSource write SetDataSource;
710	>
711	>	property AfterCancel;
712	>	property AfterClose;
713	>	property AfterDelete;
714	>	property AfterEdit;
715	>	property AfterInsert;
716	>	property AfterOpen;
717	>	property AfterPost;
718	>	property AfterScroll;
719	>	property BeforeCancel;
720	>	property BeforeClose;
721	>	property BeforeDelete;
722	>	property BeforeEdit;
723	>	property BeforeInsert;
724	>	property BeforeOpen;
725	>	property BeforePost;
726	>	property BeforeScroll;
727	>	property OnCalcFields;
728	>	property OnDeleteError;
729	>	property OnEditError;
730	>	property OnFilterRecord;
731	>	property OnNewRecord;
732	>	property OnPostError;
733	>	property OnValidatePost;
734	>	end;
735	>
736	>	{ TIBDSBlobStream }
737	>	TIBDSBlobStream = class(TStream)
738	>	private
739	>	FHasWritten: boolean;
740	>	protected
741	>	FField: TField;
742	>	FBlobStream: TIBBlobStream;
743	>	function  GetSize: Int64; override;
744	>	public
745	>	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
746	>	Mode: TBlobStreamMode);
747	>	destructor Destroy; override;
748	>	function Read(var Buffer; Count: Longint): Longint; override;
749	>	function Seek(Offset: Longint; Origin: Word): Longint; override;
750	>	procedure SetSize(NewSize: Longint); override;
751	>	function Write(const Buffer; Count: Longint): Longint; override;
752	>	end;
753	>
754	>	const
755	>	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
756	>	nil,                { ftUnknown }
757	>	TIBStringField,     { ftString }
758	>	TSmallintField,     { ftSmallint }
759	>	TIntegerField,      { ftInteger }
760	>	TWordField,         { ftWord }
761	>	TBooleanField,      { ftBoolean }
762	>	TFloatField,        { ftFloat }
763	>	TCurrencyField,     { ftCurrency }
764	>	TIBBCDField,        { ftBCD }
765	>	TDateField,         { ftDate }
766	>	TTimeField,         { ftTime }
767	>	TDateTimeField,     { ftDateTime }
768	>	TBytesField,        { ftBytes }
769	>	TVarBytesField,     { ftVarBytes }
770	>	TAutoIncField,      { ftAutoInc }
771	>	TBlobField,         { ftBlob }
772	>	TIBMemoField,       { ftMemo }
773	>	TGraphicField,      { ftGraphic }
774	>	TBlobField,         { ftFmtMemo }
775	>	TBlobField,         { ftParadoxOle }
776	>	TBlobField,         { ftDBaseOle }
777	>	TBlobField,         { ftTypedBinary }
778	>	nil,                { ftCursor }
779	>	TStringField,       { ftFixedChar }
780	>	TIBWideStringField,    { ftWideString }
781	>	TLargeIntField,     { ftLargeInt }
782	>	nil,          { ftADT }
783	>	nil,        { ftArray }
784	>	nil,    { ftReference }
785	>	nil,     { ftDataSet }
786	>	TBlobField,         { ftOraBlob }
787	>	TMemoField,         { ftOraClob }
788	>	TVariantField,      { ftVariant }
789	>	nil,    { ftInterface }
790	>	nil,     { ftIDispatch }
791	>	TGuidField,        { ftGuid }
792	>	TDateTimeField,    {ftTimestamp}
793	>	TIBBCDField,       {ftFMTBcd}
794	>	nil,  {ftFixedWideChar}
795	>	TIBWideMemoField);   {ftWideMemo}
796	>	(*
797	>	TADTField,          { ftADT }
798	>	TArrayField,        { ftArray }
799	>	TReferenceField,    { ftReference }
800	>	TDataSetField,     { ftDataSet }
801	>	TBlobField,         { ftOraBlob }
802	>	TMemoField,         { ftOraClob }
803	>	TVariantField,      { ftVariant }
804	>	TInterfaceField,    { ftInterface }
805	>	TIDispatchField,     { ftIDispatch }
806	>	TGuidField);        { ftGuid } *)
807	>	(*var
808	>	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
809	>
810	>	implementation
811	>
812	>	uses IBIntf, Variants, FmtBCD, LazUTF8;
813	>
814	>	const FILE_BEGIN = 0;
815	>	FILE_CURRENT = 1;
816	>	FILE_END = 2;
817	>
818	>	type
819	>
820	>	TFieldNode = class(TObject)
821	>	protected
822	>	FieldName : String;
823	>	COMPUTED_BLR : Boolean;
824	>	DEFAULT_VALUE : boolean;
825	>	NextField : TFieldNode;
826	>	end;
827	>
828	>	TRelationNode = class(TObject)
829	>	protected
830	>	RelationName : String;
831	>	FieldNodes : TFieldNode;
832	>	NextRelation : TRelationNode;
833	>	end;
834	>
835	>	{Extended Field Def for character set info}
836	>
837	>	{ TIBFieldDef }
838	>
839	>	TIBFieldDef = class(TFieldDef)
840	>	private
841	>	FCharacterSetName: RawByteString;
842	>	FCharacterSetSize: integer;
843	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
844	>	FCodePage: TSystemCodePage;
845	>	{$ENDIF}
846	>	published
847	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
848	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
849	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
850	>	property CodePage: TSystemCodePage read FCodePage write FCodePage;
851	>	{$ENDIF}
852	>	end;
853	>
854	>
855	>	{  Copied from LCLProc in order to avoid LCL dependency
856	>
857	>	Ensures the covenient look of multiline string
858	>	when displaying it in the single line
859	>	* Replaces CR and LF with spaces
860	>	* Removes duplicate spaces
861	>	}
862	>	function TextToSingleLine(const AText: string): string;
863	>	var
864	>	str: string;
865	>	i, wstart, wlen: Integer;
866	>	begin
867	>	str := Trim(AText);
868	>	wstart := 0;
869	>	wlen := 0;
870	>	i := 1;
871	>	while i < Length(str) - 1 do
872	>	begin
873	>	if (str[i] in [' ', #13, #10]) then
874	>	begin
875	>	if (wstart = 0) then
876	>	begin
877	>	wstart := i;
878	>	wlen := 1;
879	>	end else
880	>	Inc(wlen);
881	>	end else
882	>	begin
883	>	if wstart > 0 then
884	>	begin
885	>	str[wstart] := ' ';
886	>	Delete(str, wstart+1, wlen-1);
887	>	Dec(i, wlen-1);
888	>	wstart := 0;
889	>	end;
890	>	end;
891	>	Inc(i);
892	>	end;
893	>	Result := str;
894	>	end;
895	>
896	>	{ TIBWideMemoField }
897	>
898	>	function TIBWideMemoField.GetTruncatedText: string;
899	>	begin
900	>	Result := GetAsString;
901	>
902	>	if Result <> '' then
903	>	if DisplayWidth = 0 then
904	>	Result := TextToSingleLine(Result)
905	>	else
906	>	if Length(Result) > DisplayWidth then {Show truncation with elipses}
907	>	Result := TextToSingleLine(system.copy(Result,1,DisplayWidth-3)) + '...';
908	>	end;
909	>
910	>	function TIBWideMemoField.GetDefaultWidth: Longint;
911	>	begin
912	>	Result := 128;
913	>	end;
914	>
915	>	procedure TIBWideMemoField.GetText(var AText: string; ADisplayText: Boolean);
916	>	begin
917	>	if ADisplayText then
918	>	begin
919	>	if not DisplayTextAsClassName and (CharacterSetName<> '') then
920	>	AText := GetTruncatedText
921	>	else
922	>	inherited GetText(AText, ADisplayText);
923	>	end
924	>	else
925	>	AText := GetAsString;
926	>	end;
927	>
928	>	constructor TIBWideMemoField.Create(AOwner: TComponent);
929	>	begin
930	>	inherited Create(AOwner);
931	>	BlobType := ftWideMemo;
932	>	end;
933	>
934	>	{ TIBMemoField }
935	>
936	>	function TIBMemoField.GetTruncatedText: string;
937	>	begin
938	>	Result := GetAsString;
939	>
940	>	if Result <> '' then
941	>	begin
942	>	case CharacterSetSize of
943	>	1:
944	>	if DisplayWidth = 0 then
945	>	Result := TextToSingleLine(Result)
946	>	else
947	>	if Length(Result) > DisplayWidth then {Show truncation with elipses}
948	>	Result := TextToSingleLine(system.copy(Result,1,DisplayWidth-3)) + '...';
949	>
950	>	{2: case 2 ignored. This should be handled by TIBWideMemo}
951	>
952	>	3, {Assume UNICODE_FSS is really UTF8}
953	>	4: {Include GB18030 - assuming UTF8 routine work for this codeset}
954	>	if DisplayWidth = 0 then
955	>	Result := ValidUTF8String(TextToSingleLine(Result))
956	>	else
957	>	if UTF8Length(Result) > DisplayWidth then {Show truncation with elipses}
958	>	Result := ValidUTF8String(TextToSingleLine(UTF8Copy(Result,1,DisplayWidth-3))) + '...';
959	>	end;
960	>	end
961	>	end;
962	>
963	>	function TIBMemoField.GetAsString: string;
964	>	var s: RawByteString;
965	>	begin
966	>	s := inherited GetAsString;
967	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
968	>	SetCodePage(s,CodePage,false);
969	>	{$ENDIF}
970	>	Result := s;
971	>	end;
972	>
973	>	function TIBMemoField.GetDefaultWidth: Longint;
974	>	begin
975	>	if DisplayTextAsClassName then
976	>	Result := inherited
977	>	else
978	>	Result := 128;
979	>	end;
980	>
981	>	procedure TIBMemoField.GetText(var AText: string; ADisplayText: Boolean);
982	>	begin
983	>	if ADisplayText then
984	>	begin
985	>	if not DisplayTextAsClassName and (CharacterSetName <> '') then
986	>	AText := GetTruncatedText
987	>	else
988	>	inherited GetText(AText, ADisplayText);
989	>	end
990	>	else
991	>	AText := GetAsString;
992	>	end;
993	>
994	>	procedure TIBMemoField.SetAsString(const AValue: string);
995	>	var s: RawByteString;
996	>	begin
997	>	s := AValue;
998	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
999	>	if StringCodePage(Value) <> CodePage then
1000	>	SetCodePage(s,CodePage,true);
1001	>	{$ENDIF}
1002	>	inherited SetAsString(s);
1003	>	end;
1004	>
1005	>	constructor TIBMemoField.Create(AOwner: TComponent);
1006	>	begin
1007	>	inherited Create(AOwner);
1008	>	BlobType := ftMemo;
1009	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1010	>	FCodePage := CP_NONE;
1011	>	{$ENDIF}
1012	>	end;
1013	>
1014	>	{ TIBControlLink }
1015	>
1016	>	destructor TIBControlLink.Destroy;
1017	>	begin
1018	>	IBDataSet := nil;
1019	>	inherited Destroy;
1020	>	end;
1021	>
1022	>	procedure TIBControlLink.UpdateParams(Sender: TObject);
1023	>	begin
1024	>
1025	>	end;
1026	>
1027	>	procedure TIBControlLink.UpdateSQL(Sender: TObject);
1028	>	begin
1029	>
1030	>	end;
1031	>
1032	>	procedure TIBControlLink.SetIBDataSet(AValue: TIBCustomDataSet);
1033	>	begin
1034	>	if FTIBDataSet = AValue then Exit;
1035	>	if IBDataSet <> nil then
1036	>	IBDataSet.UnRegisterIBLink(self);
1037	>	FTIBDataSet := AValue;
1038	>	if IBDataSet <> nil then
1039	>	IBDataSet.RegisterIBLink(self);
1040	>	end;
1041	>
1042	>
1043	>	{ TIBStringField}
1044	>
1045	>	function TIBStringField.GetDefaultWidth: Longint;
1046	>	begin
1047	>	Result := Size div CharacterSetSize;
1048	>	end;
1049	>
1050	>	constructor TIBStringField.Create(aOwner: TComponent);
1051	>	begin
1052	>	inherited Create(aOwner);
1053	>	FCharacterSetSize := 1;
1054	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1055	>	FCodePage := CP_NONE;
1056	>	{$ENDIF}
1057	>	end;
1058	>
1059	>	class procedure TIBStringField.CheckTypeSize(Value: Integer);
1060	>	begin
1061	>	{ don't check string size. all sizes valid }
1062	>	end;
1063	>
1064	>	function TIBStringField.GetAsString: string;
1065	>	begin
1066	>	if not GetValue(Result) then Result := '';
1067	>	end;
1068	>
1069	>	function TIBStringField.GetAsVariant: Variant;
1070	>	var
1071	>	S: string;
1072	>	begin
1073	>	if GetValue(S) then Result := S else Result := Null;
1074	>	end;
1075	>
1076	>	function TIBStringField.GetValue(var Value: string): Boolean;
1077	>	var
1078	>	Buffer: PChar;
1079	>	s: RawByteString;
1080	>	begin
1081	>	Buffer := nil;
1082	>	IBAlloc(Buffer, 0, Size + 1);
1083	>	try
1084	>	Result := GetData(Buffer);
1085	>	if Result then
1086	>	begin
1087	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1088	>	s := string(Buffer);
1089	>	SetCodePage(s,CodePage,false);
1090	>	Value := s;
1091	>	//      writeln(FieldName,': ', StringCodePage(Value),', ',Value);
1092	>	{$ELSE}
1093	>	Value := string(Buffer);
1094	>	{$ENDIF}
1095	>	if Transliterate and (Value <> '') then
1096	>	DataSet.Translate(PChar(Value), PChar(Value), False);
1097	>	end
1098	>	finally
1099	>	FreeMem(Buffer);
1100	>	end;
1101	>	end;
1102	>
1103	>	procedure TIBStringField.SetAsString(const Value: string);
1104	>	var
1105	>	Buffer: PChar;
1106	>	s: RawByteString;
1107	>	begin
1108	>	Buffer := nil;
1109	>	IBAlloc(Buffer, 0, Size + 1);
1110	>	try
1111	>	s := Value;
1112	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1113	>	if StringCodePage(s) <> CodePage then
1114	>	SetCodePage(s,CodePage,true);
1115	>	{$ENDIF}
1116	>	StrLCopy(Buffer, PChar(s), Size);
1117	>	if Transliterate then
1118	>	DataSet.Translate(Buffer, Buffer, True);
1119	>	SetData(Buffer);
1120	>	finally
1121	>	FreeMem(Buffer);
1122	>	end;
1123	>	end;
1124	>
1125	>
1126	>	{ TIBBCDField }
1127	>
1128	>	constructor TIBBCDField.Create(AOwner: TComponent);
1129	>	begin
1130	>	inherited Create(AOwner);
1131	>	SetDataType(ftBCD);
1132	>	Size := 8;
1133	>	end;
1134	>
1135	>	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
1136	>	begin
1137	>	{ No need to check as the base type is currency, not BCD }
1138	>	end;
1139	>
1140	>	function TIBBCDField.GetAsCurrency: Currency;
1141	>	begin
1142	>	if not GetValue(Result) then
1143	>	Result := 0;
1144	>	end;
1145	>
1146	>	function TIBBCDField.GetAsString: string;
1147	>	var
1148	>	C: System.Currency;
1149	>	begin
1150	>	if GetValue(C) then
1151	>	Result := CurrToStr(C)
1152	>	else
1153	>	Result := '';
1154	>	end;
1155	>
1156	>	function TIBBCDField.GetAsVariant: Variant;
1157	>	var
1158	>	C: System.Currency;
1159	>	begin
1160	>	if GetValue(C) then
1161	>	Result := C
1162	>	else
1163	>	Result := Null;
1164	>	end;
1165	>
1166	>	function TIBBCDField.GetDataSize: Integer;
1167	>	begin
1168	>	{$IFDEF TBCDFIELD_IS_BCD}
1169	>	Result := 8;
1170	>	{$ELSE}
1171	>	Result := inherited GetDataSize
1172	>	{$ENDIF}
1173	>	end;
1174	>
1175	>	{ TIBDataLink }
1176	>
1177	>	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
1178	>	begin
1179	>	inherited Create;
1180	>	FDataSet := ADataSet;
1181	>	end;
1182	>
1183	>	destructor TIBDataLink.Destroy;
1184	>	begin
1185	>	FDataSet.FDataLink := nil;
1186	>	inherited Destroy;
1187	>	end;
1188	>
1189	>
1190	>	procedure TIBDataLink.ActiveChanged;
1191	>	begin
1192	>	if FDataSet.Active then
1193	>	FDataSet.RefreshParams;
1194	>	end;
1195	>
1196	>
1197	>	function TIBDataLink.GetDetailDataSet: TDataSet;
1198	>	begin
1199	>	Result := FDataSet;
1200	>	end;
1201	>
1202	>	procedure TIBDataLink.RecordChanged(Field: TField);
1203	>	begin
1204	>	if (Field = nil) and FDataSet.Active then
1205	>	FDataSet.RefreshParams;
1206	>	end;
1207	>
1208	>	procedure TIBDataLink.CheckBrowseMode;
1209	>	begin
1210	>	if FDataSet.Active then
1211	>	FDataSet.CheckBrowseMode;
1212	>	end;
1213	>
1214	>	{ TIBCustomDataSet }
1215	>
1216	>	constructor TIBCustomDataSet.Create(AOwner: TComponent);
1217	>	begin
1218	>	inherited Create(AOwner);
1219	>	FIBLoaded := False;
1220	>	CheckIBLoaded;
1221	>	FIBLoaded := True;
1222	>	FBase := TIBBase.Create(Self);
1223	>	FIBLinks := TList.Create;
1224	>	FCurrentRecord := -1;
1225	>	FDeletedRecords := 0;
1226	>	FUniDirectional := False;
1227	>	FBufferChunks := BufferCacheSize;
1228	>	FBlobStreamList := TList.Create;
1229	>	FGeneratorField := TIBGenerator.Create(self);
1230	>	FDataLink := TIBDataLink.Create(Self);
1231	>	FQDelete := TIBSQL.Create(Self);
1232	>	FQDelete.OnSQLChanging := SQLChanging;
1233	>	FQDelete.GoToFirstRecordOnExecute := False;
1234	>	FQInsert := TIBSQL.Create(Self);
1235	>	FQInsert.OnSQLChanging := SQLChanging;
1236	>	FQInsert.GoToFirstRecordOnExecute := False;
1237	>	FQRefresh := TIBSQL.Create(Self);
1238	>	FQRefresh.OnSQLChanging := SQLChanging;
1239	>	FQRefresh.GoToFirstRecordOnExecute := False;
1240	>	FQSelect := TIBSQL.Create(Self);
1241	>	FQSelect.OnSQLChanging := SQLChanging;
1242	>	FQSelect.OnSQLChanged := SQLChanged;
1243	>	FQSelect.GoToFirstRecordOnExecute := False;
1244	>	FQModify := TIBSQL.Create(Self);
1245	>	FQModify.OnSQLChanging := SQLChanging;
1246	>	FQModify.GoToFirstRecordOnExecute := False;
1247	>	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
1248	>	FParamCheck := True;
1249	>	FGenerateParamNames := False;
1250	>	FForcedRefresh := False;
1251	>	FAutoCommit:= acDisabled;
1252	>	FDataSetCloseAction := dcDiscardChanges;
1253	>	{Bookmark Size is Integer for IBX}
1254	>	BookmarkSize := SizeOf(Integer);
1255	>	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
1256	>	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
1257	>	FBase.OnDatabaseFree := DoDatabaseFree;
1258	>	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
1259	>	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
1260	>	FBase.OnTransactionFree := DoTransactionFree;
1261	>	if AOwner is TIBDatabase then
1262	>	Database := TIBDatabase(AOwner)
1263	>	else
1264	>	if AOwner is TIBTransaction then
1265	>	Transaction := TIBTransaction(AOwner);
1266	>	FBaseSQLSelect := TStringList.Create;
1267	>	end;
1268	>
1269	>	destructor TIBCustomDataSet.Destroy;
1270	>	begin
1271	>	if Active then Active := false;
1272	>	if FIBLoaded then
1273	>	begin
1274	>	if assigned(FGeneratorField) then FGeneratorField.Free;
1275	>	FDataLink.Free;
1276	>	FBase.Free;
1277	>	ClearBlobCache;
1278	>	ClearIBLinks;
1279	>	FIBLinks.Free;
1280	>	FBlobStreamList.Free;
1281	>	FreeMem(FBufferCache);
1282	>	FBufferCache := nil;
1283	>	FreeMem(FOldBufferCache);
1284	>	FOldBufferCache := nil;
1285	>	FCacheSize := 0;
1286	>	FOldCacheSize := 0;
1287	>	FMappedFieldPosition := nil;
1288	>	end;
1289	>	if assigned(FBaseSQLSelect) then FBaseSQLSelect.Free;
1290	>	if assigned(FParser) then FParser.Free;
1291	>	inherited Destroy;
1292	>	end;
1293	>
1294	>	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
1295	>	TGetResult;
1296	>	begin
1297	>	while not IsVisible(Buffer) do
1298	>	begin
1299	>	if GetMode = gmPrior then
1300	>	begin
1301	>	Dec(FCurrentRecord);
1302	>	if FCurrentRecord = -1 then
1303	>	begin
1304	>	result := grBOF;
1305	>	exit;
1306	>	end;
1307	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1308	>	end
1309	>	else begin
1310	>	Inc(FCurrentRecord);
1311	>	if (FCurrentRecord = FRecordCount) then
1312	>	begin
1313	>	if (not FQSelect.EOF) and (FQSelect.Next <> nil) then
1314	>	begin
1315	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
1316	>	Inc(FRecordCount);
1317	>	end
1318	>	else begin
1319	>	result := grEOF;
1320	>	exit;
1321	>	end;
1322	>	end
1323	>	else
1324	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1325	>	end;
1326	>	end;
1327	>	result := grOK;
1328	>	end;
1329	>
1330	>	procedure TIBCustomDataSet.ApplyUpdates;
1331	>	var
1332	>	{$IFDEF NEW_TBOOKMARK }
1333	>	CurBookmark: TBookmark;
1334	>	{$ELSE}
1335	>	CurBookmark: string;
1336	>	{$ENDIF}
1337	>	Buffer: PRecordData;
1338	>	CurUpdateTypes: TIBUpdateRecordTypes;
1339	>	UpdateAction: TIBUpdateAction;
1340	>	UpdateKind: TUpdateKind;
1341	>	bRecordsSkipped: Boolean;
1342	>
1343	>	procedure GetUpdateKind;
1344	>	begin
1345	>	case Buffer^.rdCachedUpdateStatus of
1346	>	cusModified:
1347	>	UpdateKind := ukModify;
1348	>	cusInserted:
1349	>	UpdateKind := ukInsert;
1350	>	else
1351	>	UpdateKind := ukDelete;
1352	>	end;
1353	>	end;
1354	>
1355	>	procedure ResetBufferUpdateStatus;
1356	>	begin
1357	>	case Buffer^.rdCachedUpdateStatus of
1358	>	cusModified:
1359	>	begin
1360	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1361	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1362	>	end;
1363	>	cusInserted:
1364	>	begin
1365	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1366	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1367	>	end;
1368	>	cusDeleted:
1369	>	begin
1370	>	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
1371	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1372	>	end;
1373	>	end;
1374	>	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
1375	>	end;
1376	>
1377	>	procedure UpdateUsingOnUpdateRecord;
1378	>	begin
1379	>	UpdateAction := uaFail;
1380	>	try
1381	>	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
1382	>	except
1383	>	on E: Exception do
1384	>	begin
1385	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1386	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1387	>	if UpdateAction = uaFail then
1388	>	raise;
1389	>	end;
1390	>	end;
1391	>	end;
1392	>
1393	>	procedure UpdateUsingUpdateObject;
1394	>	begin
1395	>	try
1396	>	FUpdateObject.Apply(UpdateKind,PChar(Buffer));
1397	>	ResetBufferUpdateStatus;
1398	>	except
1399	>	on E: Exception do
1400	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1401	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1402	>	end;
1403	>	end;
1404	>
1405	>	procedure UpdateUsingInternalquery;
1406	>	begin
1407	>	try
1408	>	case Buffer^.rdCachedUpdateStatus of
1409	>	cusModified:
1410	>	InternalPostRecord(FQModify, Buffer);
1411	>	cusInserted:
1412	>	InternalPostRecord(FQInsert, Buffer);
1413	>	cusDeleted:
1414	>	InternalDeleteRecord(FQDelete, Buffer);
1415	>	end;
1416	>	except
1417	>	on E: EIBError do begin
1418	>	UpdateAction := uaFail;
1419	>	if Assigned(FOnUpdateError) then
1420	>	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
1421	>	case UpdateAction of
1422	>	uaFail: raise;
1423	>	uaAbort: SysUtils.Abort;
1424	>	uaSkip: bRecordsSkipped := True;
1425	>	end;
1426	>	end;
1427	>	end;
1428	>	end;
1429	>
1430	>	begin
1431	>	if State in [dsEdit, dsInsert] then
1432	>	Post;
1433	>	FBase.CheckDatabase;
1434	>	FBase.CheckTransaction;
1435	>	DisableControls;
1436	>	CurBookmark := Bookmark;
1437	>	CurUpdateTypes := FUpdateRecordTypes;
1438	>	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1439	>	try
1440	>	First;
1441	>	bRecordsSkipped := False;
1442	>	while not EOF do
1443	>	begin
1444	>	Buffer := PRecordData(GetActiveBuf);
1445	>	GetUpdateKind;
1446	>	UpdateAction := uaApply;
1447	>	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
1448	>	begin
1449	>	if (Assigned(FOnUpdateRecord)) then
1450	>	UpdateUsingOnUpdateRecord
1451	>	else
1452	>	if Assigned(FUpdateObject) then
1453	>	UpdateUsingUpdateObject;
1454	>	case UpdateAction of
1455	>	uaFail:
1456	>	IBError(ibxeUserAbort, [nil]);
1457	>	uaAbort:
1458	>	SysUtils.Abort;
1459	>	uaApplied:
1460	>	ResetBufferUpdateStatus;
1461	>	uaSkip:
1462	>	bRecordsSkipped := True;
1463	>	uaRetry:
1464	>	Continue;
1465	>	end;
1466	>	end;
1467	>	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
1468	>	begin
1469	>	UpdateUsingInternalquery;
1470	>	UpdateAction := uaApplied;
1471	>	end;
1472	>	Next;
1473	>	end;
1474	>	FUpdatesPending := bRecordsSkipped;
1475	>	finally
1476	>	FUpdateRecordTypes := CurUpdateTypes;
1477	>	Bookmark := CurBookmark;
1478	>	EnableControls;
1479	>	end;
1480	>	end;
1481	>
1482	>	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1483	>	begin
1484	>	FQSelect.BatchInput(InputObject);
1485	>	end;
1486	>
1487	>	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1488	>	var
1489	>	Qry: TIBSQL;
1490	>	begin
1491	>	Qry := TIBSQL.Create(Self);
1492	>	try
1493	>	Qry.Database := FBase.Database;
1494	>	Qry.Transaction := FBase.Transaction;
1495	>	Qry.SQL.Assign(FQSelect.SQL);
1496	>	Qry.BatchOutput(OutputObject);
1497	>	finally
1498	>	Qry.Free;
1499	>	end;
1500	>	end;
1501	>
1502	>	procedure TIBCustomDataSet.CancelUpdates;
1503	>	var
1504	>	CurUpdateTypes: TIBUpdateRecordTypes;
1505	>	begin
1506	>	if State in [dsEdit, dsInsert] then
1507	>	Post;
1508	>	if FCachedUpdates and FUpdatesPending then
1509	>	begin
1510	>	DisableControls;
1511	>	CurUpdateTypes := UpdateRecordTypes;
1512	>	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1513	>	try
1514	>	First;
1515	>	while not EOF do
1516	>	begin
1517	>	if UpdateStatus = usInserted then
1518	>	RevertRecord
1519	>	else
1520	>	begin
1521	>	RevertRecord;
1522	>	Next;
1523	>	end;
1524	>	end;
1525	>	finally
1526	>	UpdateRecordTypes := CurUpdateTypes;
1527	>	First;
1528	>	FUpdatesPending := False;
1529	>	EnableControls;
1530	>	end;
1531	>	end;
1532	>	end;
1533	>
1534	>	function TIBCustomDataSet.GetFieldPosition(AliasName: string): integer;
1535	>	var i: integer;
1536	>	Prepared: boolean;
1537	>	begin
1538	>	Result := 0;
1539	>	Prepared := FInternalPrepared;
1540	>	if not Prepared then
1541	>	InternalPrepare;
1542	>	try
1543	>	for i := 0 to Length(FAliasNameList) - 1 do
1544	>	if FAliasNameList[i] = AliasName then
1545	>	begin
1546	>	Result := i + 1;
1547	>	Exit
1548	>	end;
1549	>	finally
1550	>	if not Prepared then
1551	>	InternalUnPrepare;
1552	>	end;
1553	>	end;
1554	>
1555	>	procedure TIBCustomDataSet.ActivateConnection;
1556	>	begin
1557	>	if not Assigned(Database) then
1558	>	IBError(ibxeDatabaseNotAssigned, [nil]);
1559	>	if not Assigned(Transaction) then
1560	>	IBError(ibxeTransactionNotAssigned, [nil]);
1561	>	if not Database.Connected then Database.Open;
1562	>	end;
1563	>
1564	>	function TIBCustomDataSet.ActivateTransaction: Boolean;
1565	>	begin
1566	>	Result := False;
1567	>	if not Assigned(Transaction) then
1568	>	IBError(ibxeTransactionNotAssigned, [nil]);
1569	>	if not Transaction.Active then
1570	>	begin
1571	>	Result := True;
1572	>	Transaction.StartTransaction;
1573	>	FDidActivate := True;
1574	>	end;
1575	>	end;
1576	>
1577	>	procedure TIBCustomDataSet.DeactivateTransaction;
1578	>	var
1579	>	i: Integer;
1580	>	begin
1581	>	if not Assigned(Transaction) then
1582	>	IBError(ibxeTransactionNotAssigned, [nil]);
1583	>	with Transaction do
1584	>	begin
1585	>	for i := 0 to SQLObjectCount - 1 do
1586	>	begin
1587	>	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1588	>	begin
1589	>	if TDataSet(SQLObjects[i].owner).Active then
1590	>	begin
1591	>	FDidActivate := False;
1592	>	exit;
1593	>	end;
1594	>	end;
1595	>	end;
1596	>	end;
1597	>	FInternalPrepared := False;
1598	>	if Transaction.InTransaction then
1599	>	Transaction.Commit;
1600	>	FDidActivate := False;
1601	>	end;
1602	>
1603	>	procedure TIBCustomDataSet.CheckDatasetClosed;
1604	>	begin
1605	>	if FOpen then
1606	>	IBError(ibxeDatasetOpen, [nil]);
1607	>	end;
1608	>
1609	>	procedure TIBCustomDataSet.CheckDatasetOpen;
1610	>	begin
1611	>	if not FOpen then
1612	>	IBError(ibxeDatasetClosed, [nil]);
1613	>	end;
1614	>
1615	>	function TIBCustomDataSet.CreateParser: TSelectSQLParser;
1616	>	begin
1617	>	Result := TSelectSQLParser.Create(self,FBaseSQLSelect);
1618	>	Result.OnSQLChanging := SQLChanging
1619	>	end;
1620	>
1621	>	procedure TIBCustomDataSet.CheckNotUniDirectional;
1622	>	begin
1623	>	if UniDirectional then
1624	>	IBError(ibxeDataSetUniDirectional, [nil]);
1625	>	end;
1626	>
1627	>	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1628	>	begin
1629	>	with PRecordData(Buffer)^ do
1630	>	if (State = dsInsert) and (not Modified) then
1631	>	begin
1632	>	rdRecordNumber := FRecordCount;
1633	>	FCurrentRecord := FRecordCount;
1634	>	end;
1635	>	end;
1636	>
1637	>	function TIBCustomDataSet.CanEdit: Boolean;
1638	>	var
1639	>	Buff: PRecordData;
1640	>	begin
1641	>	Buff := PRecordData(GetActiveBuf);
1642	>	result := (FQModify.SQL.Text <> '') or
1643	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1644	>	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1645	>	(FCachedUpdates));
1646	>	end;
1647	>
1648	>	function TIBCustomDataSet.CanInsert: Boolean;
1649	>	begin
1650	>	result := (FQInsert.SQL.Text <> '') or
1651	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1652	>	end;
1653	>
1654	>	function TIBCustomDataSet.CanDelete: Boolean;
1655	>	begin
1656	>	if (FQDelete.SQL.Text <> '') or
1657	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1658	>	result := True
1659	>	else
1660	>	result := False;
1661	>	end;
1662	>
1663	>	function TIBCustomDataSet.CanRefresh: Boolean;
1664	>	begin
1665	>	result := (FQRefresh.SQL.Text <> '') or
1666	>	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1667	>	end;
1668	>
1669	>	procedure TIBCustomDataSet.CheckEditState;
1670	>	begin
1671	>	case State of
1672	>	{ Check all the wsEditMode types }
1673	>	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1674	>	dsNewValue, dsInternalCalc :
1675	>	begin
1676	>	if (State in [dsEdit]) and (not CanEdit) then
1677	>	IBError(ibxeCannotUpdate, [nil]);
1678	>	if (State in [dsInsert]) and (not CanInsert) then
1679	>	IBError(ibxeCannotInsert, [nil]);
1680	>	end;
1681	>	else
1682	>	IBError(ibxeNotEditing, [])
1683	>	end;
1684	>	end;
1685	>
1686	>	procedure TIBCustomDataSet.ClearBlobCache;
1687	>	var
1688	>	i: Integer;
1689	>	begin
1690	>	for i := 0 to FBlobStreamList.Count - 1 do
1691	>	begin
1692	>	TIBBlobStream(FBlobStreamList[i]).Free;
1693	>	FBlobStreamList[i] := nil;
1694	>	end;
1695	>	FBlobStreamList.Pack;
1696	>	end;
1697	>
1698	>	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1699	>	begin
1700	>	Move(Source^, Dest^, FRecordBufferSize);
1701	>	end;
1702	>
1703	>	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1704	>	begin
1705	>	if Active then
1706	>	Active := False;
1707	>	FInternalPrepared := False;
1708	>	if Assigned(FBeforeDatabaseDisconnect) then
1709	>	FBeforeDatabaseDisconnect(Sender);
1710	>	end;
1711	>
1712	>	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1713	>	begin
1714	>	if Assigned(FAfterDatabaseDisconnect) then
1715	>	FAfterDatabaseDisconnect(Sender);
1716	>	end;
1717	>
1718	>	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1719	>	begin
1720	>	if Assigned(FDatabaseFree) then
1721	>	FDatabaseFree(Sender);
1722	>	end;
1723	>
1724	>	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject;
1725	>	Action: TTransactionAction);
1726	>	begin
1727	>	FCloseAction := Action;
1728	>	FInTransactionEnd := true;
1729	>	try
1730	>	if Active then
1731	>	Active := False;
1732	>	finally
1733	>	FInTransactionEnd := false;
1734	>	end;
1735	>	if FQSelect <> nil then
1736	>	FQSelect.FreeHandle;
1737	>	if FQDelete <> nil then
1738	>	FQDelete.FreeHandle;
1739	>	if FQInsert <> nil then
1740	>	FQInsert.FreeHandle;
1741	>	if FQModify <> nil then
1742	>	FQModify.FreeHandle;
1743	>	if FQRefresh <> nil then
1744	>	FQRefresh.FreeHandle;
1745	>	if Assigned(FBeforeTransactionEnd) then
1746	>	FBeforeTransactionEnd(Sender);
1747	>	end;
1748	>
1749	>	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1750	>	begin
1751	>	if Assigned(FAfterTransactionEnd) then
1752	>	FAfterTransactionEnd(Sender);
1753	>	end;
1754	>
1755	>	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1756	>	begin
1757	>	if Assigned(FTransactionFree) then
1758	>	FTransactionFree(Sender);
1759	>	end;
1760	>
1761	>	{ Read the record from FQSelect.Current into the record buffer
1762	>	Then write the buffer to in memory cache }
1763	>	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
1764	>	RecordNumber: Integer; Buffer: PChar);
1765	>	var
1766	>	p: PRecordData;
1767	>	pbd: PBlobDataArray;
1768	>	i, j: Integer;
1769	>	LocalData: Pointer;
1770	>	LocalDate, LocalDouble: Double;
1771	>	LocalInt: Integer;
1772	>	LocalBool: wordBool;
1773	>	LocalInt64: Int64;
1774	>	LocalCurrency: Currency;
1775	>	FieldsLoaded: Integer;
1776	>	temp: TIBXSQLVAR;
1777	>	begin
1778	>	p := PRecordData(Buffer);
1779	>	{ Make sure blob cache is empty }
1780	>	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
1781	>	if RecordNumber > -1 then
1782	>	for i := 0 to BlobFieldCount - 1 do
1783	>	pbd^[i] := nil;
1784	>	{ Get record information }
1785	>	p^.rdBookmarkFlag := bfCurrent;
1786	>	p^.rdFieldCount := Qry.Current.Count;
1787	>	p^.rdRecordNumber := RecordNumber;
1788	>	p^.rdUpdateStatus := usUnmodified;
1789	>	p^.rdCachedUpdateStatus := cusUnmodified;
1790	>	p^.rdSavedOffset := $FFFFFFFF;
1791	>
1792	>	{ Load up the fields }
1793	>	FieldsLoaded := FQSelect.Current.Count;
1794	>	j := 1;
1795	>	for i := 0 to Qry.Current.Count - 1 do
1796	>	begin
1797	>	if (Qry = FQSelect) then
1798	>	j := i + 1
1799	>	else begin
1800	>	if FieldsLoaded = 0 then
1801	>	break;
1802	>	j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1;
1803	>	if j < 1 then
1804	>	continue
1805	>	else
1806	>	Dec(FieldsLoaded);
1807	>	end;
1808	>	with FQSelect.Current[j - 1].Data^ do
1809	>	if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
1810	>	begin
1811	>	if sqllen <= 8 then
1812	>	p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^;
1813	>	continue;
1814	>	end;
1815	>	if j > 0 then with p^ do
1816	>	begin
1817	>	rdFields[j].fdDataType :=
1818	>	Qry.Current[i].Data^.sqltype and (not 1);
1819	>	rdFields[j].fdDataScale :=
1820	>	Qry.Current[i].Data^.sqlscale;
1821	>	rdFields[j].fdNullable :=
1822	>	(Qry.Current[i].Data^.sqltype and 1 = 1);
1823	>	rdFields[j].fdIsNull :=
1824	>	(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1));
1825	>	LocalData := Qry.Current[i].Data^.sqldata;
1826	>	case rdFields[j].fdDataType of
1827	>	SQL_TIMESTAMP:
1828	>	begin
1829	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1830	>	if RecordNumber >= 0 then
1831	>	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime));
1832	>	LocalData := PChar(@LocalDate);
1833	>	end;
1834	>	SQL_TYPE_DATE:
1835	>	begin
1836	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1837	>	if RecordNumber >= 0 then
1838	>	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date;
1839	>	LocalData := PChar(@LocalInt);
1840	>	end;
1841	>	SQL_TYPE_TIME:
1842	>	begin
1843	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1844	>	if RecordNumber >= 0 then
1845	>	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time;
1846	>	LocalData := PChar(@LocalInt);
1847	>	end;
1848	>	SQL_SHORT, SQL_LONG:
1849	>	begin
1850	>	if (rdFields[j].fdDataScale = 0) then
1851	>	begin
1852	>	rdFields[j].fdDataSize := SizeOf(Integer);
1853	>	if RecordNumber >= 0 then
1854	>	LocalInt := Qry.Current[i].AsLong;
1855	>	LocalData := PChar(@LocalInt);
1856	>	end
1857	>	else if (rdFields[j].fdDataScale >= (-4)) then
1858	>	begin
1859	>	rdFields[j].fdDataSize := SizeOf(Currency);
1860	>	if RecordNumber >= 0 then
1861	>	LocalCurrency := Qry.Current[i].AsCurrency;
1862	>	LocalData := PChar(@LocalCurrency);
1863	>	end
1864	>	else begin
1865	>	rdFields[j].fdDataSize := SizeOf(Double);
1866	>	if RecordNumber >= 0 then
1867	>	LocalDouble := Qry.Current[i].AsDouble;
1868	>	LocalData := PChar(@LocalDouble);
1869	>	end;
1870	>	end;
1871	>	SQL_INT64:
1872	>	begin
1873	>	if (rdFields[j].fdDataScale = 0) then
1874	>	begin
1875	>	rdFields[j].fdDataSize := SizeOf(Int64);
1876	>	if RecordNumber >= 0 then
1877	>	LocalInt64 := Qry.Current[i].AsInt64;
1878	>	LocalData := PChar(@LocalInt64);
1879	>	end
1880	>	else if (rdFields[j].fdDataScale >= (-4)) then
1881	>	begin
1882	>	rdFields[j].fdDataSize := SizeOf(Currency);
1883	>	if RecordNumber >= 0 then
1884	>	LocalCurrency := Qry.Current[i].AsCurrency;
1885	>	LocalData := PChar(@LocalCurrency);
1886	>	end
1887	>	else begin
1888	>	rdFields[j].fdDataSize := SizeOf(Double);
1889	>	if RecordNumber >= 0 then
1890	>	LocalDouble := Qry.Current[i].AsDouble;
1891	>	LocalData := PChar(@LocalDouble);
1892	>	end
1893	>	end;
1894	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
1895	>	begin
1896	>	rdFields[j].fdDataSize := SizeOf(Double);
1897	>	if RecordNumber >= 0 then
1898	>	LocalDouble := Qry.Current[i].AsDouble;
1899	>	LocalData := PChar(@LocalDouble);
1900	>	end;
1901	>	SQL_VARYING:
1902	>	begin
1903	>	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1904	>	rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2);
1905	>	if RecordNumber >= 0 then
1906	>	begin
1907	>	if (rdFields[j].fdDataLength = 0) then
1908	>	LocalData := nil
1909	>	else
1910	>	begin
1911	>	temp :=  Qry.Current[i];
1912	>	LocalData := @temp.Data^.sqldata[2];
1913	>	(*              LocalData := @Qry.Current[i].Data^.sqldata[2];*)
1914	>	end;
1915	>	end;
1916	>	end;
1917	>	SQL_BOOLEAN:
1918	>	begin
1919	>	LocalBool:= false;
1920	>	rdFields[j].fdDataSize := SizeOf(wordBool);
1921	>	if RecordNumber >= 0 then
1922	>	LocalBool := Qry.Current[i].AsBoolean;
1923	>	LocalData := PChar(@LocalBool);
1924	>	end;
1925	>	else { SQL_TEXT, SQL_BLOB, SQL_ARRAY, SQL_QUAD }
1926	>	begin
1927	>	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1928	>	if (rdFields[j].fdDataType = SQL_TEXT) then
1929	>	rdFields[j].fdDataLength := rdFields[j].fdDataSize;
1930	>	end;
1931	>	end;
1932	>	if RecordNumber < 0 then
1933	>	begin
1934	>	rdFields[j].fdIsNull := True;
1935	>	rdFields[j].fdDataOfs := FRecordSize;
1936	>	Inc(FRecordSize, rdFields[j].fdDataSize);
1937	>	end
1938	>	else begin
1939	>	if rdFields[j].fdDataType = SQL_VARYING then
1940	>	begin
1941	>	if LocalData <> nil then
1942	>	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength)
1943	>	end
1944	>	else
1945	>	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize)
1946	>	end;
1947	>	end;
1948	>	end;
1949	>	WriteRecordCache(RecordNumber, PChar(p));
1950	>	end;
1951	>
1952	>	function TIBCustomDataSet.GetActiveBuf: PChar;
1953	>	begin
1954	>	case State of
1955	>	dsBrowse:
1956	>	if IsEmpty then
1957	>	result := nil
1958	>	else
1959	>	result := ActiveBuffer;
1960	>	dsEdit, dsInsert:
1961	>	result := ActiveBuffer;
1962	>	dsCalcFields:
1963	>	result := CalcBuffer;
1964	>	dsFilter:
1965	>	result := FFilterBuffer;
1966	>	dsNewValue:
1967	>	result := ActiveBuffer;
1968	>	dsOldValue:
1969	>	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
1970	>	PRecordData(FOldBuffer)^.rdRecordNumber) then
1971	>	result := FOldBuffer
1972	>	else
1973	>	result := ActiveBuffer;
1974	>	else if not FOpen then
1975	>	result := nil
1976	>	else
1977	>	result := ActiveBuffer;
1978	>	end;
1979	>	end;
1980	>
1981	>	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
1982	>	begin
1983	>	if Active then
1984	>	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
1985	>	else
1986	>	result := cusUnmodified;
1987	>	end;
1988	>
1989	>	function TIBCustomDataSet.GetDatabase: TIBDatabase;
1990	>	begin
1991	>	result := FBase.Database;
1992	>	end;
1993	>
1994	>	function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE;
1995	>	begin
1996	>	result := FBase.DBHandle;
1997	>	end;
1998	>
1999	>	function TIBCustomDataSet.GetDeleteSQL: TStrings;
2000	>	begin
2001	>	result := FQDelete.SQL;
2002	>	end;
2003	>
2004	>	function TIBCustomDataSet.GetInsertSQL: TStrings;
2005	>	begin
2006	>	result := FQInsert.SQL;
2007	>	end;
2008	>
2009	>	function TIBCustomDataSet.GetSQLParams: TIBXSQLDA;
2010	>	begin
2011	>	if not FInternalPrepared then
2012	>	InternalPrepare;
2013	>	result := FQSelect.Params;
2014	>	end;
2015	>
2016	>	function TIBCustomDataSet.GetRefreshSQL: TStrings;
2017	>	begin
2018	>	result := FQRefresh.SQL;
2019	>	end;
2020	>
2021	>	function TIBCustomDataSet.GetSelectSQL: TStrings;
2022	>	begin
2023	>	result := FQSelect.SQL;
2024	>	end;
2025	>
2026	>	function TIBCustomDataSet.GetStatementType: TIBSQLTypes;
2027	>	begin
2028	>	result := FQSelect.SQLType;
2029	>	end;
2030	>
2031	>	function TIBCustomDataSet.GetModifySQL: TStrings;
2032	>	begin
2033	>	result := FQModify.SQL;
2034	>	end;
2035	>
2036	>	function TIBCustomDataSet.GetTransaction: TIBTransaction;
2037	>	begin
2038	>	result := FBase.Transaction;
2039	>	end;
2040	>
2041	>	function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE;
2042	>	begin
2043	>	result := FBase.TRHandle;
2044	>	end;
2045	>
2046	>	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
2047	>	begin
2048	>	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
2049	>	FUpdateObject.Apply(ukDelete,Buff)
2050	>	else
2051	>	begin
2052	>	SetInternalSQLParams(FQDelete, Buff);
2053	>	FQDelete.ExecQuery;
2054	>	end;
2055	>	with PRecordData(Buff)^ do
2056	>	begin
2057	>	rdUpdateStatus := usDeleted;
2058	>	rdCachedUpdateStatus := cusUnmodified;
2059	>	end;
2060	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2061	>	end;
2062	>
2063	>	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
2064	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
2065	>	var
2066	>	keyFieldList: TList;
2067	>	{$IFDEF NEW_TBOOKMARK }
2068	>	CurBookmark: TBookmark;
2069	>	{$ELSE}
2070	>	CurBookmark: string;
2071	>	{$ENDIF}
2072	>	fieldValue: Variant;
2073	>	lookupValues: array of variant;
2074	>	i, fieldCount: Integer;
2075	>	fieldValueAsString: string;
2076	>	lookupValueAsString: string;
2077	>	begin
2078	>	keyFieldList := TList.Create;
2079	>	try
2080	>	GetFieldList(keyFieldList, KeyFields);
2081	>	fieldCount := keyFieldList.Count;
2082	>	CurBookmark := Bookmark;
2083	>	result := false;
2084	>	SetLength(lookupValues, fieldCount);
2085	>	if not EOF then
2086	>	begin
2087	>	for i := 0 to fieldCount - 1 do  {expand key values into lookupValues array}
2088	>	begin
2089	>	if VarIsArray(KeyValues) then
2090	>	lookupValues[i] := KeyValues[i]
2091	>	else
2092	>	if i > 0 then
2093	>	lookupValues[i] := NULL
2094	>	else
2095	>	lookupValues[0] := KeyValues;
2096	>
2097	>	{convert to upper case is case insensitive search}
2098	>	if (TField(keyFieldList[i]).DataType = ftString) and
2099	>	not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
2100	>	lookupValues[i] := UpperCase(lookupValues[i]);
2101	>	end;
2102	>	end;
2103	>	while not result and not EOF do   {search for a matching record}
2104	>	begin
2105	>	i := 0;
2106	>	result := true;
2107	>	while result and (i < fieldCount) do
2108	>	{see if all of the key fields matches}
2109	>	begin
2110	>	fieldValue := TField(keyFieldList[i]).Value;
2111	>	result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
2112	>	if result and not VarIsNull(fieldValue) then
2113	>	begin
2114	>	try
2115	>	if TField(keyFieldList[i]).DataType = ftString then
2116	>	begin
2117	>	{strings need special handling because of the locate options that
2118	>	apply to them}
2119	>	fieldValueAsString := TField(keyFieldList[i]).AsString;
2120	>	lookupValueAsString := lookupValues[i];
2121	>	if (loCaseInsensitive in Options) then
2122	>	fieldValueAsString := UpperCase(fieldValueAsString);
2123	>
2124	>	if (loPartialKey in Options) then
2125	>	result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
2126	>	else
2127	>	result := result and (fieldValueAsString = lookupValueAsString);
2128	>	end
2129	>	else
2130	>	result := result and (lookupValues[i] =
2131	>	VarAsType(fieldValue, VarType(lookupValues[i])));
2132	>	except on EVariantError do
2133	>	result := False;
2134	>	end;
2135	>	end;
2136	>	Inc(i);
2137	>	end;
2138	>	if not result then
2139	>	Next;
2140	>	end;
2141	>	if not result then
2142	>	Bookmark := CurBookmark
2143	>	else
2144	>	CursorPosChanged;
2145	>	finally
2146	>	keyFieldList.Free;
2147	>	SetLength(lookupValues,0)
2148	>	end;
2149	>	end;
2150	>
2151	>	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
2152	>	var
2153	>	i, j, k: Integer;
2154	>	pbd: PBlobDataArray;
2155	>	begin
2156	>	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
2157	>	j := 0;
2158	>	for i := 0 to FieldCount - 1 do
2159	>	if Fields[i].IsBlob then
2160	>	begin
2161	>	k := FMappedFieldPosition[Fields[i].FieldNo -1];
2162	>	if pbd^[j] <> nil then
2163	>	begin
2164	>	pbd^[j].Finalize;
2165	>	PISC_QUAD(
2166	>	PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ :=
2167	>	pbd^[j].BlobID;
2168	>	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
2169	>	end;
2170	>	Inc(j);
2171	>	end;
2172	>	if Assigned(FUpdateObject) then
2173	>	begin
2174	>	if (Qry = FQDelete) then
2175	>	FUpdateObject.Apply(ukDelete,Buff)
2176	>	else if (Qry = FQInsert) then
2177	>	FUpdateObject.Apply(ukInsert,Buff)
2178	>	else
2179	>	FUpdateObject.Apply(ukModify,Buff);
2180	>	end
2181	>	else begin
2182	>	SetInternalSQLParams(Qry, Buff);
2183	>	Qry.ExecQuery;
2184	>	end;
2185	>	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
2186	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2187	>	SetModified(False);
2188	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2189	>	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
2190	>	InternalRefreshRow;
2191	>	end;
2192	>
2193	>	procedure TIBCustomDataSet.InternalRefreshRow;
2194	>	var
2195	>	Buff: PChar;
2196	>	ofs: DWORD;
2197	>	Qry: TIBSQL;
2198	>	begin
2199	>	FBase.SetCursor;
2200	>	try
2201	>	Buff := GetActiveBuf;
2202	>	if CanRefresh then
2203	>	begin
2204	>	if Buff <> nil then
2205	>	begin
2206	>	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
2207	>	begin
2208	>	Qry := TIBSQL.Create(self);
2209	>	Qry.Database := Database;
2210	>	Qry.Transaction := Transaction;
2211	>	Qry.GoToFirstRecordOnExecute := False;
2212	>	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
2213	>	end
2214	>	else
2215	>	Qry := FQRefresh;
2216	>	SetInternalSQLParams(Qry, Buff);
2217	>	Qry.ExecQuery;
2218	>	try
2219	>	if (Qry.SQLType = SQLExecProcedure) or
2220	>	(Qry.Next <> nil) then
2221	>	begin
2222	>	ofs := PRecordData(Buff)^.rdSavedOffset;
2223	>	FetchCurrentRecordToBuffer(Qry,
2224	>	PRecordData(Buff)^.rdRecordNumber,
2225	>	Buff);
2226	>	if FCachedUpdates and (ofs <> $FFFFFFFF) then
2227	>	begin
2228	>	PRecordData(Buff)^.rdSavedOffset := ofs;
2229	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2230	>	SaveOldBuffer(Buff);
2231	>	end;
2232	>	end;
2233	>	finally
2234	>	Qry.Close;
2235	>	end;
2236	>	if Qry <> FQRefresh then
2237	>	Qry.Free;
2238	>	end
2239	>	end
2240	>	else
2241	>	IBError(ibxeCannotRefresh, [nil]);
2242	>	finally
2243	>	FBase.RestoreCursor;
2244	>	end;
2245	>	end;
2246	>
2247	>	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
2248	>	var
2249	>	NewBuffer, OldBuffer: PRecordData;
2250	>
2251	>	begin
2252	>	NewBuffer := nil;
2253	>	OldBuffer := nil;
2254	>	NewBuffer := PRecordData(AllocRecordBuffer);
2255	>	OldBuffer := PRecordData(AllocRecordBuffer);
2256	>	try
2257	>	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
2258	>	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
2259	>	case NewBuffer^.rdCachedUpdateStatus of
2260	>	cusInserted:
2261	>	begin
2262	>	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
2263	>	Inc(FDeletedRecords);
2264	>	end;
2265	>	cusModified,
2266	>	cusDeleted:
2267	>	begin
2268	>	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
2269	>	Dec(FDeletedRecords);
2270	>	CopyRecordBuffer(OldBuffer, NewBuffer);
2271	>	end;
2272	>	end;
2273	>
2274	>	if State in dsEditModes then
2275	>	Cancel;
2276	>
2277	>	WriteRecordCache(RecordNumber, PChar(NewBuffer));
2278	>
2279	>	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
2280	>	ReSync([]);
2281	>	finally
2282	>	FreeRecordBuffer(PChar(NewBuffer));
2283	>	FreeRecordBuffer(PChar(OldBuffer));
2284	>	end;
2285	>	end;
2286	>
2287	>	{ A visible record is one that is not truly deleted,
2288	>	and it is also listed in the FUpdateRecordTypes set }
2289	>
2290	>	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
2291	>	begin
2292	>	result := True;
2293	>	if not (State = dsOldValue) then
2294	>	result :=
2295	>	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
2296	>	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
2297	>	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
2298	>	end;
2299	>
2300	>
2301	>	function TIBCustomDataSet.LocateNext(const KeyFields: string;
2302	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
2303	>	begin
2304	>	DisableControls;
2305	>	try
2306	>	result := InternalLocate(KeyFields, KeyValues, Options);
2307	>	finally
2308	>	EnableControls;
2309	>	end;
2310	>	end;
2311	>
2312	>	procedure TIBCustomDataSet.InternalPrepare;
2313	>	var
2314	>	DidActivate: Boolean;
2315	>	begin
2316	>	if FInternalPrepared then
2317	>	Exit;
2318	>	DidActivate := False;
2319	>	FBase.SetCursor;
2320	>	try
2321	>	ActivateConnection;
2322	>	DidActivate := ActivateTransaction;
2323	>	FBase.CheckDatabase;
2324	>	FBase.CheckTransaction;
2325	>	if HasParser and (FParser.SQLText <> FQSelect.SQL.Text) then
2326	>	begin
2327	>	FQSelect.OnSQLChanged := nil; {Do not react to change}
2328	>	try
2329	>	FQSelect.SQL.Text := FParser.SQLText;
2330	>	finally
2331	>	FQSelect.OnSQLChanged := SQLChanged;
2332	>	end;
2333	>	end;
2334	>	//   writeln( FQSelect.SQL.Text);
2335	>	if FQSelect.SQL.Text <> '' then
2336	>	begin
2337	>	if not FQSelect.Prepared then
2338	>	begin
2339	>	FQSelect.GenerateParamNames := FGenerateParamNames;
2340	>	FQSelect.ParamCheck := ParamCheck;
2341	>	FQSelect.Prepare;
2342	>	end;
2343	>	FQDelete.GenerateParamNames := FGenerateParamNames;
2344	>	if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
2345	>	FQDelete.Prepare;
2346	>	FQInsert.GenerateParamNames := FGenerateParamNames;
2347	>	if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
2348	>	FQInsert.Prepare;
2349	>	FQRefresh.GenerateParamNames := FGenerateParamNames;
2350	>	if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
2351	>	FQRefresh.Prepare;
2352	>	FQModify.GenerateParamNames := FGenerateParamNames;
2353	>	if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
2354	>	FQModify.Prepare;
2355	>	FInternalPrepared := True;
2356	>	InternalInitFieldDefs;
2357	>	end else
2358	>	IBError(ibxeEmptyQuery, [nil]);
2359	>	finally
2360	>	if DidActivate then
2361	>	DeactivateTransaction;
2362	>	FBase.RestoreCursor;
2363	>	end;
2364	>	end;
2365	>
2366	>	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
2367	>	begin
2368	>	SetModified(Value);
2369	>	end;
2370	>
2371	>	procedure TIBCustomDataSet.RevertRecord;
2372	>	var
2373	>	Buff: PRecordData;
2374	>	begin
2375	>	if FCachedUpdates and FUpdatesPending then
2376	>	begin
2377	>	Buff := PRecordData(GetActiveBuf);
2378	>	InternalRevertRecord(Buff^.rdRecordNumber);
2379	>	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
2380	>	DataEvent(deRecordChange, 0);
2381	>	end;
2382	>	end;
2383	>
2384	>	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
2385	>	var
2386	>	OldBuffer: Pointer;
2387	>	procedure CopyOldBuffer;
2388	>	begin
2389	>	CopyRecordBuffer(Buffer, OldBuffer);
2390	>	if BlobFieldCount > 0 then
2391	>	FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream),
2392	>	0);
2393	>	end;
2394	>
2395	>	begin
2396	>	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
2397	>	begin
2398	>	OldBuffer := AllocRecordBuffer;
2399	>	try
2400	>	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
2401	>	begin
2402	>	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
2403	>	FILE_END);
2404	>	CopyOldBuffer;
2405	>	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
2406	>	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
2407	>	FILE_BEGIN, Buffer);
2408	>	end
2409	>	else begin
2410	>	CopyOldBuffer;
2411	>	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2412	>	OldBuffer);
2413	>	end;
2414	>	finally
2415	>	FreeRecordBuffer(PChar(OldBuffer));
2416	>	end;
2417	>	end;
2418	>	end;
2419	>
2420	>	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
2421	>	begin
2422	>	if (Value <= 0) then
2423	>	FBufferChunks := BufferCacheSize
2424	>	else
2425	>	FBufferChunks := Value;
2426	>	end;
2427	>
2428	>	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
2429	>	begin
2430	>	if (FBase.Database <> Value) then
2431	>	begin
2432	>	CheckDatasetClosed;
2433	>	FBase.Database := Value;
2434	>	FQDelete.Database := Value;
2435	>	FQInsert.Database := Value;
2436	>	FQRefresh.Database := Value;
2437	>	FQSelect.Database := Value;
2438	>	FQModify.Database := Value;
2439	>	end;
2440	>	end;
2441	>
2442	>	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
2443	>	begin
2444	>	if FQDelete.SQL.Text <> Value.Text then
2445	>	begin
2446	>	Disconnect;
2447	>	FQDelete.SQL.Assign(Value);
2448	>	end;
2449	>	end;
2450	>
2451	>	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
2452	>	begin
2453	>	if FQInsert.SQL.Text <> Value.Text then
2454	>	begin
2455	>	Disconnect;
2456	>	FQInsert.SQL.Assign(Value);
2457	>	end;
2458	>	end;
2459	>
2460	>	procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
2461	>	var
2462	>	i, j: Integer;
2463	>	cr, data: PChar;
2464	>	fn, st: string;
2465	>	OldBuffer: Pointer;
2466	>	ts: TTimeStamp;
2467	>	begin
2468	>	if (Buffer = nil) then
2469	>	IBError(ibxeBufferNotSet, [nil]);
2470	>	if (not FInternalPrepared) then
2471	>	InternalPrepare;
2472	>	OldBuffer := nil;
2473	>	try
2474	>	for i := 0 to Qry.Params.Count - 1 do
2475	>	begin
2476	>	fn := Qry.Params[i].Name;
2477	>	if (Pos('OLD_', fn) = 1) then {mbcs ok}
2478	>	begin
2479	>	fn := Copy(fn, 5, Length(fn));
2480	>	if not Assigned(OldBuffer) then
2481	>	begin
2482	>	OldBuffer := AllocRecordBuffer;
2483	>	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
2484	>	end;
2485	>	cr := OldBuffer;
2486	>	end
2487	>	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
2488	>	begin
2489	>	fn := Copy(fn, 5, Length(fn));
2490	>	cr := Buffer;
2491	>	end
2492	>	else
2493	>	cr := Buffer;
2494	>	j := FQSelect.FieldIndex[fn] + 1;
2495	>	if (j > 0) then
2496	>	with PRecordData(cr)^ do
2497	>	begin
2498	>	if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize}
2499	>	begin
2500	>	PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey;
2501	>	continue;
2502	>	end;
2503	>	if rdFields[j].fdIsNull then
2504	>	Qry.Params[i].IsNull := True
2505	>	else begin
2506	>	Qry.Params[i].IsNull := False;
2507	>	data := cr + rdFields[j].fdDataOfs;
2508	>	case rdFields[j].fdDataType of
2509	>	SQL_TEXT, SQL_VARYING:
2510	>	begin
2511	>	SetString(st, data, rdFields[j].fdDataLength);
2512	>	Qry.Params[i].AsString := st;
2513	>	end;
2514	>	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
2515	>	Qry.Params[i].AsDouble := PDouble(data)^;
2516	>	SQL_SHORT, SQL_LONG:
2517	>	begin
2518	>	if rdFields[j].fdDataScale = 0 then
2519	>	Qry.Params[i].AsLong := PLong(data)^
2520	>	else if rdFields[j].fdDataScale >= (-4) then
2521	>	Qry.Params[i].AsCurrency := PCurrency(data)^
2522	>	else
2523	>	Qry.Params[i].AsDouble := PDouble(data)^;
2524	>	end;
2525	>	SQL_INT64:
2526	>	begin
2527	>	if rdFields[j].fdDataScale = 0 then
2528	>	Qry.Params[i].AsInt64 := PInt64(data)^
2529	>	else if rdFields[j].fdDataScale >= (-4) then
2530	>	Qry.Params[i].AsCurrency := PCurrency(data)^
2531	>	else
2532	>	Qry.Params[i].AsDouble := PDouble(data)^;
2533	>	end;
2534	>	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
2535	>	Qry.Params[i].AsQuad := PISC_QUAD(data)^;
2536	>	SQL_TYPE_DATE:
2537	>	begin
2538	>	ts.Date := PInt(data)^;
2539	>	ts.Time := 0;
2540	>	Qry.Params[i].AsDate :=
2541	>	TimeStampToDateTime(ts);
2542	>	end;
2543	>	SQL_TYPE_TIME:
2544	>	begin
2545	>	ts.Date := 0;
2546	>	ts.Time := PInt(data)^;
2547	>	Qry.Params[i].AsTime :=
2548	>	TimeStampToDateTime(ts);
2549	>	end;
2550	>	SQL_TIMESTAMP:
2551	>	Qry.Params[i].AsDateTime :=
2552	>	TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^)));
2553	>	SQL_BOOLEAN:
2554	>	Qry.Params[i].AsBoolean := PWordBool(data)^;
2555	>	end;
2556	>	end;
2557	>	end;
2558	>	end;
2559	>	finally
2560	>	if (OldBuffer <> nil) then
2561	>	FreeRecordBuffer(PChar(OldBuffer));
2562	>	end;
2563	>	end;
2564	>
2565	>	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2566	>	begin
2567	>	if FQRefresh.SQL.Text <> Value.Text then
2568	>	begin
2569	>	Disconnect;
2570	>	FQRefresh.SQL.Assign(Value);
2571	>	end;
2572	>	end;
2573	>
2574	>	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2575	>	begin
2576	>	if FQSelect.SQL.Text <> Value.Text then
2577	>	begin
2578	>	Disconnect;
2579	>	FQSelect.SQL.Assign(Value);
2580	>	end;
2581	>	end;
2582	>
2583	>	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2584	>	begin
2585	>	if FQModify.SQL.Text <> Value.Text then
2586	>	begin
2587	>	Disconnect;
2588	>	FQModify.SQL.Assign(Value);
2589	>	end;
2590	>	end;
2591	>
2592	>	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2593	>	begin
2594	>	if (FBase.Transaction <> Value) then
2595	>	begin
2596	>	CheckDatasetClosed;
2597	>	FBase.Transaction := Value;
2598	>	FQDelete.Transaction := Value;
2599	>	FQInsert.Transaction := Value;
2600	>	FQRefresh.Transaction := Value;
2601	>	FQSelect.Transaction := Value;
2602	>	FQModify.Transaction := Value;
2603	>	end;
2604	>	end;
2605	>
2606	>	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2607	>	begin
2608	>	CheckDatasetClosed;
2609	>	FUniDirectional := Value;
2610	>	end;
2611	>
2612	>	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2613	>	begin
2614	>	FUpdateRecordTypes := Value;
2615	>	if Active then
2616	>	First;
2617	>	end;
2618	>
2619	>	procedure TIBCustomDataSet.RefreshParams;
2620	>	var
2621	>	DataSet: TDataSet;
2622	>	begin
2623	>	DisableControls;
2624	>	try
2625	>	if FDataLink.DataSource <> nil then
2626	>	begin
2627	>	DataSet := FDataLink.DataSource.DataSet;
2628	>	if DataSet <> nil then
2629	>	if DataSet.Active and (DataSet.State <> dsSetKey) then
2630	>	begin
2631	>	Close;
2632	>	Open;
2633	>	end;
2634	>	end;
2635	>	finally
2636	>	EnableControls;
2637	>	end;
2638	>	end;
2639	>
2640	>	procedure TIBCustomDataSet.RegisterIBLink(Sender: TIBControlLink);
2641	>	begin
2642	>	if FIBLinks.IndexOf(Sender) = -1 then
2643	>	FIBLinks.Add(Sender);
2644	>	end;
2645	>
2646	>
2647	>	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2648	>	begin
2649	>	Active := false;
2650	>	{  if FOpen then
2651	>	InternalClose;}
2652	>	if FInternalPrepared then
2653	>	InternalUnPrepare;
2654	>	FieldDefs.Clear;
2655	>	FieldDefs.Updated := false;
2656	>	end;
2657	>
2658	>	procedure TIBCustomDataSet.SQLChanged(Sender: TObject);
2659	>	begin
2660	>	FBaseSQLSelect.assign(FQSelect.SQL);
2661	>	end;
2662	>
2663	>	{ I can "undelete" uninserted records (make them "inserted" again).
2664	>	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2665	>	procedure TIBCustomDataSet.Undelete;
2666	>	var
2667	>	Buff: PRecordData;
2668	>	begin
2669	>	CheckActive;
2670	>	Buff := PRecordData(GetActiveBuf);
2671	>	with Buff^ do
2672	>	begin
2673	>	if rdCachedUpdateStatus = cusUninserted then
2674	>	begin
2675	>	rdCachedUpdateStatus := cusInserted;
2676	>	Dec(FDeletedRecords);
2677	>	end
2678	>	else if (rdUpdateStatus = usDeleted) and
2679	>	(rdCachedUpdateStatus = cusDeleted) then
2680	>	begin
2681	>	rdCachedUpdateStatus := cusUnmodified;
2682	>	rdUpdateStatus := usUnmodified;
2683	>	Dec(FDeletedRecords);
2684	>	end;
2685	>	WriteRecordCache(rdRecordNumber, PChar(Buff));
2686	>	end;
2687	>	end;
2688	>
2689	>	procedure TIBCustomDataSet.UnRegisterIBLink(Sender: TIBControlLink);
2690	>	begin
2691	>	FIBLinks.Remove(Sender);
2692	>	end;
2693	>
2694	>	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2695	>	begin
2696	>	if Active then
2697	>	if GetActiveBuf <> nil then
2698	>	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2699	>	else
2700	>	result := usUnmodified
2701	>	else
2702	>	result := usUnmodified;
2703	>	end;
2704	>
2705	>	function TIBCustomDataSet.IsSequenced: Boolean;
2706	>	begin
2707	>	Result := Assigned( FQSelect ) and FQSelect.EOF;
2708	>	end;
2709	>
2710	>	function TIBCustomDataSet.ParamByName(ParamName: String): TIBXSQLVAR;
2711	>	begin
2712	>	ActivateConnection;
2713	>	ActivateTransaction;
2714	>	if not FInternalPrepared then
2715	>	InternalPrepare;
2716	>	Result := Params.ByName(ParamName);
2717	>	end;
2718	>
2719	>	{Beware: the parameter FCache is used as an identifier to determine which
2720	>	cache is being operated on and is not referenced in the computation.
2721	>	The result is an adjusted offset into the identified cache, either the
2722	>	Buffer Cache or the old Buffer Cache.}
2723	>
2724	>	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
2725	>	Origin: Integer): DWORD;
2726	>	var
2727	>	OldCacheSize: Integer;
2728	>	begin
2729	>	if (FCache = FBufferCache) then
2730	>	begin
2731	>	case Origin of
2732	>	FILE_BEGIN:    FBPos := Offset;
2733	>	FILE_CURRENT:  FBPos := FBPos + Offset;
2734	>	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
2735	>	end;
2736	>	OldCacheSize := FCacheSize;
2737	>	while (FBPos >= DWORD(FCacheSize)) do
2738	>	Inc(FCacheSize, FBufferChunkSize);
2739	>	if FCacheSize > OldCacheSize then
2740	>	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
2741	>	result := FBPos;
2742	>	end
2743	>	else begin
2744	>	case Origin of
2745	>	FILE_BEGIN:    FOBPos := Offset;
2746	>	FILE_CURRENT:  FOBPos := FOBPos + Offset;
2747	>	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
2748	>	end;
2749	>	OldCacheSize := FOldCacheSize;
2750	>	while (FBPos >= DWORD(FOldCacheSize)) do
2751	>	Inc(FOldCacheSize, FBufferChunkSize);
2752	>	if FOldCacheSize > OldCacheSize then
2753	>	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
2754	>	result := FOBPos;
2755	>	end;
2756	>	end;
2757	>
2758	>	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2759	>	Buffer: PChar);
2760	>	var
2761	>	pCache: PChar;
2762	>	AdjustedOffset: DWORD;
2763	>	bOld: Boolean;
2764	>	begin
2765	>	bOld := (FCache = FOldBufferCache);
2766	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2767	>	if not bOld then
2768	>	pCache := FBufferCache + AdjustedOffset
2769	>	else
2770	>	pCache := FOldBufferCache + AdjustedOffset;
2771	>	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
2772	>	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2773	>	end;
2774	>
2775	>	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
2776	>	ReadOldBuffer: Boolean);
2777	>	begin
2778	>	if FUniDirectional then
2779	>	RecordNumber := RecordNumber mod UniCache;
2780	>	if (ReadOldBuffer) then
2781	>	begin
2782	>	ReadRecordCache(RecordNumber, Buffer, False);
2783	>	if FCachedUpdates and
2784	>	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
2785	>	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2786	>	Buffer)
2787	>	else
2788	>	if ReadOldBuffer and
2789	>	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
2790	>	CopyRecordBuffer( FOldBuffer, Buffer )
2791	>	end
2792	>	else
2793	>	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2794	>	end;
2795	>
2796	>	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2797	>	Buffer: PChar);
2798	>	var
2799	>	pCache: PChar;
2800	>	AdjustedOffset: DWORD;
2801	>	bOld: Boolean;
2802	>	dwEnd: DWORD;
2803	>	begin
2804	>	bOld := (FCache = FOldBufferCache);
2805	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2806	>	if not bOld then
2807	>	pCache := FBufferCache + AdjustedOffset
2808	>	else
2809	>	pCache := FOldBufferCache + AdjustedOffset;
2810	>	Move(Buffer^, pCache^, FRecordBufferSize);
2811	>	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2812	>	if not bOld then
2813	>	begin
2814	>	if (dwEnd > FBEnd) then
2815	>	FBEnd := dwEnd;
2816	>	end
2817	>	else begin
2818	>	if (dwEnd > FOBEnd) then
2819	>	FOBEnd := dwEnd;
2820	>	end;
2821	>	end;
2822	>
2823	>	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
2824	>	begin
2825	>	if RecordNumber >= 0 then
2826	>	begin
2827	>	if FUniDirectional then
2828	>	RecordNumber := RecordNumber mod UniCache;
2829	>	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2830	>	end;
2831	>	end;
2832	>
2833	>	function TIBCustomDataSet.AllocRecordBuffer: PChar;
2834	>	begin
2835	>	result := nil;
2836	>	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
2837	>	Move(FModelBuffer^, result^, FRecordBufferSize);
2838	>	end;
2839	>
2840	>	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
2841	>	var
2842	>	pb: PBlobDataArray;
2843	>	fs: TIBBlobStream;
2844	>	Buff: PChar;
2845	>	bTr, bDB: Boolean;
2846	>	begin
2847	>	Buff := GetActiveBuf;
2848	>	if Buff = nil then
2849	>	begin
2850	>	fs := TIBBlobStream.Create;
2851	>	fs.Mode := bmReadWrite;
2852	>	FBlobStreamList.Add(Pointer(fs));
2853	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
2854	>	exit;
2855	>	end;
2856	>	pb := PBlobDataArray(Buff + FBlobCacheOffset);
2857	>	if pb^[Field.Offset] = nil then
2858	>	begin
2859	>	AdjustRecordOnInsert(Buff);
2860	>	pb^[Field.Offset] := TIBBlobStream.Create;
2861	>	fs := pb^[Field.Offset];
2862	>	FBlobStreamList.Add(Pointer(fs));
2863	>	fs.Mode := bmReadWrite;
2864	>	fs.Database := Database;
2865	>	fs.Transaction := Transaction;
2866	>	fs.BlobID :=
2867	>	PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
2868	>	if (CachedUpdates) then
2869	>	begin
2870	>	bTr := not Transaction.InTransaction;
2871	>	bDB := not Database.Connected;
2872	>	if bDB then
2873	>	Database.Open;
2874	>	if bTr then
2875	>	Transaction.StartTransaction;
2876	>	fs.Seek(0, soFromBeginning);
2877	>	if bTr then
2878	>	Transaction.Commit;
2879	>	if bDB then
2880	>	Database.Close;
2881	>	end;
2882	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
2883	>	end else
2884	>	fs := pb^[Field.Offset];
2885	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
2886	>	end;
2887	>
2888	>	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
2889	>	const
2890	>	CMPLess = -1;
2891	>	CMPEql  =  0;
2892	>	CMPGtr  =  1;
2893	>	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
2894	>	(CMPGtr, CMPEql));
2895	>	begin
2896	>	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
2897	>
2898	>	if Result = 2 then
2899	>	begin
2900	>	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
2901	>	Result := CMPLess
2902	>	else
2903	>	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
2904	>	Result := CMPGtr
2905	>	else
2906	>	Result := CMPEql;
2907	>	end;
2908	>	end;
2909	>
2910	>	procedure TIBCustomDataSet.DoBeforeDelete;
2911	>	var
2912	>	Buff: PRecordData;
2913	>	begin
2914	>	if not CanDelete then
2915	>	IBError(ibxeCannotDelete, [nil]);
2916	>	Buff := PRecordData(GetActiveBuf);
2917	>	if FCachedUpdates and
2918	>	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
2919	>	SaveOldBuffer(PChar(Buff));
2920	>	inherited DoBeforeDelete;
2921	>	end;
2922	>
2923	>	procedure TIBCustomDataSet.DoAfterDelete;
2924	>	begin
2925	>	inherited DoAfterDelete;
2926	>	FBase.DoAfterDelete(self);
2927	>	InternalAutoCommit;
2928	>	end;
2929	>
2930	>	procedure TIBCustomDataSet.DoBeforeEdit;
2931	>	var
2932	>	Buff: PRecordData;
2933	>	begin
2934	>	Buff := PRecordData(GetActiveBuf);
2935	>	if not(CanEdit or (FQModify.SQL.Count <> 0) or
2936	>	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
2937	>	IBError(ibxeCannotUpdate, [nil]);
2938	>	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
2939	>	SaveOldBuffer(PChar(Buff));
2940	>	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
2941	>	inherited DoBeforeEdit;
2942	>	end;
2943	>
2944	>	procedure TIBCustomDataSet.DoAfterEdit;
2945	>	begin
2946	>	inherited DoAfterEdit;
2947	>	FBase.DoAfterEdit(self);
2948	>	end;
2949	>
2950	>	procedure TIBCustomDataSet.DoBeforeInsert;
2951	>	begin
2952	>	if not CanInsert then
2953	>	IBError(ibxeCannotInsert, [nil]);
2954	>	inherited DoBeforeInsert;
2955	>	end;
2956	>
2957	>	procedure TIBCustomDataSet.DoAfterInsert;
2958	>	begin
2959	>	if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
2960	>	GeneratorField.Apply;
2961	>	inherited DoAfterInsert;
2962	>	FBase.DoAfterInsert(self);
2963	>	end;
2964	>
2965	>	procedure TIBCustomDataSet.DoBeforeClose;
2966	>	begin
2967	>	inherited DoBeforeClose;
2968	>	if State in [dsInsert,dsEdit] then
2969	>	begin
2970	>	if FInTransactionEnd and (FCloseAction = TARollback) then
2971	>	Exit;
2972	>
2973	>	if DataSetCloseAction = dcSaveChanges then
2974	>	Post;
2975	>	{Note this can fail with an exception e.g. due to
2976	>	database validation error. In which case the dataset remains open }
2977	>	end;
2978	>	end;
2979	>
2980	>	procedure TIBCustomDataSet.DoBeforeOpen;
2981	>	var i: integer;
2982	>	begin
2983	>	if assigned(FParser) then
2984	>	FParser.Reset;
2985	>	for i := 0 to FIBLinks.Count - 1 do
2986	>	TIBControlLink(FIBLinks[i]).UpdateSQL(self);
2987	>	inherited DoBeforeOpen;
2988	>	for i := 0 to FIBLinks.Count - 1 do
2989	>	TIBControlLink(FIBLinks[i]).UpdateParams(self);
2990	>	end;
2991	>
2992	>	procedure TIBCustomDataSet.DoBeforePost;
2993	>	begin
2994	>	inherited DoBeforePost;
2995	>	if (State = dsInsert) and
2996	>	(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
2997	>	GeneratorField.Apply
2998	>	end;
2999	>
3000	>	procedure TIBCustomDataSet.DoAfterPost;
3001	>	begin
3002	>	inherited DoAfterPost;
3003	>	FBase.DoAfterPost(self);
3004	>	InternalAutoCommit;
3005	>	end;
3006	>
3007	>	procedure TIBCustomDataSet.FetchAll;
3008	>	var
3009	>	{$IFDEF NEW_TBOOKMARK }
3010	>	CurBookmark: TBookmark;
3011	>	{$ELSE}
3012	>	CurBookmark: string;
3013	>	{$ENDIF}
3014	>	begin
3015	>	FBase.SetCursor;
3016	>	try
3017	>	if FQSelect.EOF or not FQSelect.Open then
3018	>	exit;
3019	>	DisableControls;
3020	>	try
3021	>	CurBookmark := Bookmark;
3022	>	Last;
3023	>	Bookmark := CurBookmark;
3024	>	finally
3025	>	EnableControls;
3026	>	end;
3027	>	finally
3028	>	FBase.RestoreCursor;
3029	>	end;
3030	>	end;
3031	>
3032	>	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
3033	>	begin
3034	>	FreeMem(Buffer);
3035	>	Buffer := nil;
3036	>	end;
3037	>
3038	>	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
3039	>	begin
3040	>	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
3041	>	end;
3042	>
3043	>	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
3044	>	begin
3045	>	result := PRecordData(Buffer)^.rdBookmarkFlag;
3046	>	end;
3047	>
3048	>	function TIBCustomDataSet.GetCanModify: Boolean;
3049	>	begin
3050	>	result := (FQInsert.SQL.Text <> '') or
3051	>	(FQModify.SQL.Text <> '') or
3052	>	(FQDelete.SQL.Text <> '') or
3053	>	(Assigned(FUpdateObject));
3054	>	end;
3055	>
3056	>	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
3057	>	begin
3058	>	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
3059	>	begin
3060	>	UpdateCursorPos;
3061	>	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
3062	>	result := True;
3063	>	end
3064	>	else
3065	>	result := False;
3066	>	end;
3067	>
3068	>	function TIBCustomDataSet.GetDataSource: TDataSource;
3069	>	begin
3070	>	if FDataLink = nil then
3071	>	result := nil
3072	>	else
3073	>	result := FDataLink.DataSource;
3074	>	end;
3075	>
3076	>	function TIBCustomDataSet.GetDBAliasName(FieldNo: integer): string;
3077	>	begin
3078	>	Result := FAliasNameMap[FieldNo-1]
3079	>	end;
3080	>
3081	>	function TIBCustomDataSet.GetFieldDefFromAlias(aliasName: string): TFieldDef;
3082	>	var
3083	>	i: integer;
3084	>	begin
3085	>	Result := nil;
3086	>	for i := 0 to Length(FAliasNameMap) - 1 do
3087	>	if FAliasNameMap[i] = aliasName then
3088	>	begin
3089	>	Result := FieldDefs[i];
3090	>	Exit
3091	>	end;
3092	>	end;
3093	>
3094	>	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
3095	>	begin
3096	>	Result := DefaultFieldClasses[FieldType];
3097	>	end;
3098	>
3099	>	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
3100	>	begin
3101	>	result := GetFieldData(FieldByNumber(FieldNo), buffer);
3102	>	end;
3103	>
3104	>	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
3105	>	var
3106	>	Buff, Data: PChar;
3107	>	CurrentRecord: PRecordData;
3108	>	begin
3109	>	result := False;
3110	>	Buff := GetActiveBuf;
3111	>	if (Buff = nil) or
3112	>	(not IsVisible(Buff)) or not assigned(Field.DataSet) then
3113	>	exit;
3114	>	{ The intention here is to stuff the buffer with the data for the
3115	>	referenced field for the current record }
3116	>	CurrentRecord := PRecordData(Buff);
3117	>	if (Field.FieldNo < 0) then
3118	>	begin
3119	>	Inc(Buff, FRecordSize + Field.Offset);
3120	>	result := Boolean(Buff[0]);
3121	>	if result and (Buffer <> nil) then
3122	>	Move(Buff[1], Buffer^, Field.DataSize);
3123	>	end
3124	>	else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
3125	>	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
3126	>	begin
3127	>	result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull;
3128	>	if result and (Buffer <> nil) then
3129	>	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do
3130	>	begin
3131	>	Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs;
3132	>	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
3133	>	begin
3134	>	if fdDataLength < Field.DataSize then
3135	>	begin
3136	>	Move(Data^, Buffer^, fdDataLength);
3137	>	PChar(Buffer)[fdDataLength] := #0;
3138	>	end
3139	>	else
3140	>	IBError(ibxeFieldSizeError,[Field.FieldName])
3141	>	end
3142	>	else
3143	>	Move(Data^, Buffer^, Field.DataSize);
3144	>	end;
3145	>	end;
3146	>	end;
3147	>
3148	>	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
3149	>	opposed to 0-based indexes.
3150	>	This is because we want LastRecordNumber/RecordCount = 1 }
3151	>
3152	>	function TIBCustomDataSet.GetRecNo: Integer;
3153	>	begin
3154	>	if GetActiveBuf = nil then
3155	>	result := 0
3156	>	else
3157	>	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
3158	>	end;
3159	>
3160	>	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
3161	>	DoCheck: Boolean): TGetResult;
3162	>	var
3163	>	Accept: Boolean;
3164	>	SaveState: TDataSetState;
3165	>	begin
3166	>	Result := grOK;
3167	>	if Filtered and Assigned(OnFilterRecord) then
3168	>	begin
3169	>	Accept := False;
3170	>	SaveState := SetTempState(dsFilter);
3171	>	while not Accept do
3172	>	begin
3173	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
3174	>	if Result <> grOK then
3175	>	break;
3176	>	FFilterBuffer := Buffer;
3177	>	try
3178	>	Accept := True;
3179	>	OnFilterRecord(Self, Accept);
3180	>	if not Accept and (GetMode = gmCurrent) then
3181	>	GetMode := gmPrior;
3182	>	except
3183	>	//        FBase.HandleException(Self);
3184	>	end;
3185	>	end;
3186	>	RestoreState(SaveState);
3187	>	end
3188	>	else
3189	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
3190	>	end;
3191	>
3192	>	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
3193	>	DoCheck: Boolean): TGetResult;
3194	>	begin
3195	>	result := grError;
3196	>	case GetMode of
3197	>	gmCurrent: begin
3198	>	if (FCurrentRecord >= 0) then begin
3199	>	if FCurrentRecord < FRecordCount then
3200	>	ReadRecordCache(FCurrentRecord, Buffer, False)
3201	>	else begin
3202	>	while (not FQSelect.EOF) and
3203	>	(FQSelect.Next <> nil) and
3204	>	(FCurrentRecord >= FRecordCount) do begin
3205	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3206	>	Inc(FRecordCount);
3207	>	end;
3208	>	FCurrentRecord := FRecordCount - 1;
3209	>	if (FCurrentRecord >= 0) then
3210	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3211	>	end;
3212	>	result := grOk;
3213	>	end else
3214	>	result := grBOF;
3215	>	end;
3216	>	gmNext: begin
3217	>	result := grOk;
3218	>	if FCurrentRecord = FRecordCount then
3219	>	result := grEOF
3220	>	else if FCurrentRecord = FRecordCount - 1 then begin
3221	>	if (not FQSelect.EOF) then begin
3222	>	FQSelect.Next;
3223	>	Inc(FCurrentRecord);
3224	>	end;
3225	>	if (FQSelect.EOF) then begin
3226	>	result := grEOF;
3227	>	end else begin
3228	>	Inc(FRecordCount);
3229	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
3230	>	end;
3231	>	end else if (FCurrentRecord < FRecordCount) then begin
3232	>	Inc(FCurrentRecord);
3233	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3234	>	end;
3235	>	end;
3236	>	else { gmPrior }
3237	>	begin
3238	>	if (FCurrentRecord = 0) then begin
3239	>	Dec(FCurrentRecord);
3240	>	result := grBOF;
3241	>	end else if (FCurrentRecord > 0) and
3242	>	(FCurrentRecord <= FRecordCount) then begin
3243	>	Dec(FCurrentRecord);
3244	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3245	>	result := grOk;
3246	>	end else if (FCurrentRecord = -1) then
3247	>	result := grBOF;
3248	>	end;
3249	>	end;
3250	>	if result = grOk then
3251	>	result := AdjustCurrentRecord(Buffer, GetMode);
3252	>	if result = grOk then with PRecordData(Buffer)^ do begin
3253	>	rdBookmarkFlag := bfCurrent;
3254	>	GetCalcFields(Buffer);
3255	>	end else if (result = grEOF) then begin
3256	>	CopyRecordBuffer(FModelBuffer, Buffer);
3257	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
3258	>	end else if (result = grBOF) then begin
3259	>	CopyRecordBuffer(FModelBuffer, Buffer);
3260	>	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
3261	>	end else if (result = grError) then begin
3262	>	CopyRecordBuffer(FModelBuffer, Buffer);
3263	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
3264	>	end;;
3265	>	end;
3266	>
3267	>	function TIBCustomDataSet.GetRecordCount: Integer;
3268	>	begin
3269	>	result := FRecordCount - FDeletedRecords;
3270	>	end;
3271	>
3272	>	function TIBCustomDataSet.GetRecordSize: Word;
3273	>	begin
3274	>	result := FRecordBufferSize;
3275	>	end;
3276	>
3277	>	procedure TIBCustomDataSet.InternalAutoCommit;
3278	>	begin
3279	>	with Transaction do
3280	>	if InTransaction and (FAutoCommit = acCommitRetaining) then
3281	>	begin
3282	>	if CachedUpdates then ApplyUpdates;
3283	>	CommitRetaining;
3284	>	end;
3285	>	end;
3286	>
3287	>	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
3288	>	begin
3289	>	CheckEditState;
3290	>	begin
3291	>	{ When adding records, we *always* append.
3292	>	Insertion is just too costly }
3293	>	AdjustRecordOnInsert(Buffer);
3294	>	with PRecordData(Buffer)^ do
3295	>	begin
3296	>	rdUpdateStatus := usInserted;
3297	>	rdCachedUpdateStatus := cusInserted;
3298	>	end;
3299	>	if not CachedUpdates then
3300	>	InternalPostRecord(FQInsert, Buffer)
3301	>	else begin
3302	>	WriteRecordCache(FCurrentRecord, Buffer);
3303	>	FUpdatesPending := True;
3304	>	end;
3305	>	Inc(FRecordCount);
3306	>	InternalSetToRecord(Buffer);
3307	>	end
3308	>	end;
3309	>
3310	>	procedure TIBCustomDataSet.InternalCancel;
3311	>	var
3312	>	Buff: PChar;
3313	>	CurRec: Integer;
3314	>	begin
3315	>	inherited InternalCancel;
3316	>	Buff := GetActiveBuf;
3317	>	if Buff <> nil then begin
3318	>	CurRec := FCurrentRecord;
3319	>	AdjustRecordOnInsert(Buff);
3320	>	if (State = dsEdit) then begin
3321	>	CopyRecordBuffer(FOldBuffer, Buff);
3322	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3323	>	end else begin
3324	>	CopyRecordBuffer(FModelBuffer, Buff);
3325	>	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
3326	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
3327	>	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
3328	>	FCurrentRecord := CurRec;
3329	>	end;
3330	>	end;
3331	>	end;
3332	>
3333	>
3334	>	procedure TIBCustomDataSet.InternalClose;
3335	>	begin
3336	>	if FDidActivate then
3337	>	DeactivateTransaction;
3338	>	FQSelect.Close;
3339	>	ClearBlobCache;
3340	>	FreeRecordBuffer(FModelBuffer);
3341	>	FreeRecordBuffer(FOldBuffer);
3342	>	FCurrentRecord := -1;
3343	>	FOpen := False;
3344	>	FRecordCount := 0;
3345	>	FDeletedRecords := 0;
3346	>	FRecordSize := 0;
3347	>	FBPos := 0;
3348	>	FOBPos := 0;
3349	>	FCacheSize := 0;
3350	>	FOldCacheSize := 0;
3351	>	FBEnd := 0;
3352	>	FOBEnd := 0;
3353	>	FreeMem(FBufferCache);
3354	>	FBufferCache := nil;
3355	>	FreeMem(FOldBufferCache);
3356	>	FOldBufferCache := nil;
3357	>	BindFields(False);
3358	>	ResetParser;
3359	>	if DefaultFields then DestroyFields;
3360	>	end;
3361	>
3362	>	procedure TIBCustomDataSet.InternalDelete;
3363	>	var
3364	>	Buff: PChar;
3365	>	begin
3366	>	FBase.SetCursor;
3367	>	try
3368	>	Buff := GetActiveBuf;
3369	>	if CanDelete then
3370	>	begin
3371	>	if not CachedUpdates then
3372	>	InternalDeleteRecord(FQDelete, Buff)
3373	>	else
3374	>	begin
3375	>	with PRecordData(Buff)^ do
3376	>	begin
3377	>	if rdCachedUpdateStatus = cusInserted then
3378	>	rdCachedUpdateStatus := cusUninserted
3379	>	else begin
3380	>	rdUpdateStatus := usDeleted;
3381	>	rdCachedUpdateStatus := cusDeleted;
3382	>	end;
3383	>	end;
3384	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3385	>	end;
3386	>	Inc(FDeletedRecords);
3387	>	FUpdatesPending := True;
3388	>	end else
3389	>	IBError(ibxeCannotDelete, [nil]);
3390	>	finally
3391	>	FBase.RestoreCursor;
3392	>	end;
3393	>	end;
3394	>
3395	>	procedure TIBCustomDataSet.InternalFirst;
3396	>	begin
3397	>	FCurrentRecord := -1;
3398	>	end;
3399	>
3400	>	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
3401	>	begin
3402	>	FCurrentRecord := PInteger(Bookmark)^;
3403	>	end;
3404	>
3405	>	procedure TIBCustomDataSet.InternalHandleException;
3406	>	begin
3407	>	FBase.HandleException(Self)
3408	>	end;
3409	>
3410	>	procedure TIBCustomDataSet.InternalInitFieldDefs;
3411	>	begin
3412	>	if not InternalPrepared then
3413	>	begin
3414	>	InternalPrepare;
3415	>	exit;
3416	>	end;
3417	>	FieldDefsFromQuery(FQSelect);
3418	>	end;
3419	>
3420	>	procedure TIBCustomDataSet.FieldDefsFromQuery(SourceQuery: TIBSQL);
3421	>	const
3422	>	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
3423	>	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
3424	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
3425	>	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
3426	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
3427	>	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
3428	>	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
3429	>	var
3430	>	FieldType: TFieldType;
3431	>	FieldSize: Word;
3432	>	charSetID: short;
3433	>	CharSetSize: integer;
3434	>	CharSetName: RawByteString;
3435	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3436	>	FieldCodePage: TSystemCodePage;
3437	>	{$ENDIF}
3438	>	FieldNullable : Boolean;
3439	>	i, FieldPosition, FieldPrecision: Integer;
3440	>	FieldAliasName, DBAliasName: string;
3441	>	RelationName, FieldName: string;
3442	>	Query : TIBSQL;
3443	>	FieldIndex: Integer;
3444	>	FRelationNodes : TRelationNode;
3445	>
3446	>	function Add_Node(Relation, Field : String) : TRelationNode;
3447	>	var
3448	>	FField : TFieldNode;
3449	>	begin
3450	>	if FRelationNodes.RelationName = '' then
3451	>	Result := FRelationNodes
3452	>	else
3453	>	begin
3454	>	Result := TRelationNode.Create;
3455	>	Result.NextRelation := FRelationNodes;
3456	>	end;
3457	>	Result.RelationName := Relation;
3458	>	FRelationNodes := Result;
3459	>	Query.Params[0].AsString := Relation;
3460	>	Query.ExecQuery;
3461	>	while not Query.Eof do
3462	>	begin
3463	>	FField := TFieldNode.Create;
3464	>	FField.FieldName := Query.Fields[2].AsString;
3465	>	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
3466	>	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
3467	>	FField.NextField := Result.FieldNodes;
3468	>	Result.FieldNodes := FField;
3469	>	Query.Next;
3470	>	end;
3471	>	Query.Close;
3472	>	end;
3473	>
3474	>	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
3475	>	var
3476	>	FRelation : TRelationNode;
3477	>	FField : TFieldNode;
3478	>	begin
3479	>	FRelation := FRelationNodes;
3480	>	while Assigned(FRelation) and
3481	>	(FRelation.RelationName <> Relation) do
3482	>	FRelation := FRelation.NextRelation;
3483	>	if not Assigned(FRelation) then
3484	>	FRelation := Add_Node(Relation, Field);
3485	>	Result := false;
3486	>	FField := FRelation.FieldNodes;
3487	>	while Assigned(FField) do
3488	>	if FField.FieldName = Field then
3489	>	begin
3490	>	Result := Ffield.COMPUTED_BLR;
3491	>	Exit;
3492	>	end
3493	>	else
3494	>	FField := Ffield.NextField;
3495	>	end;
3496	>
3497	>	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
3498	>	var
3499	>	FRelation : TRelationNode;
3500	>	FField : TFieldNode;
3501	>	begin
3502	>	FRelation := FRelationNodes;
3503	>	while Assigned(FRelation) and
3504	>	(FRelation.RelationName <> Relation) do
3505	>	FRelation := FRelation.NextRelation;
3506	>	if not Assigned(FRelation) then
3507	>	FRelation := Add_Node(Relation, Field);
3508	>	Result := false;
3509	>	FField := FRelation.FieldNodes;
3510	>	while Assigned(FField) do
3511	>	if FField.FieldName = Field then
3512	>	begin
3513	>	Result := Ffield.DEFAULT_VALUE;
3514	>	Exit;
3515	>	end
3516	>	else
3517	>	FField := Ffield.NextField;
3518	>	end;
3519	>
3520	>	Procedure FreeNodes;
3521	>	var
3522	>	FRelation : TRelationNode;
3523	>	FField : TFieldNode;
3524	>	begin
3525	>	while Assigned(FRelationNodes) do
3526	>	begin
3527	>	While Assigned(FRelationNodes.FieldNodes) do
3528	>	begin
3529	>	FField := FRelationNodes.FieldNodes.NextField;
3530	>	FRelationNodes.FieldNodes.Free;
3531	>	FRelationNodes.FieldNodes := FField;
3532	>	end;
3533	>	FRelation := FRelationNodes.NextRelation;
3534	>	FRelationNodes.Free;
3535	>	FRelationNodes := FRelation;
3536	>	end;
3537	>	end;
3538	>
3539	>	begin
3540	>	FRelationNodes := TRelationNode.Create;
3541	>	FNeedsRefresh := False;
3542	>	Database.InternalTransaction.StartTransaction;
3543	>	Query := TIBSQL.Create(self);
3544	>	try
3545	>	Query.Database := DataBase;
3546	>	Query.Transaction := Database.InternalTransaction;
3547	>	FieldDefs.BeginUpdate;
3548	>	FieldDefs.Clear;
3549	>	FieldIndex := 0;
3550	>	if (Length(FMappedFieldPosition) < SourceQuery.Current.Count) then
3551	>	SetLength(FMappedFieldPosition, SourceQuery.Current.Count);
3552	>	Query.SQL.Text := DefaultSQL;
3553	>	Query.Prepare;
3554	>	SetLength(FAliasNameMap, SourceQuery.Current.Count);
3555	>	SetLength(FAliasNameList, SourceQuery.Current.Count);
3556	>	for i := 0 to SourceQuery.Current.Count - 1 do
3557	>	with SourceQuery.Current[i].Data^ do
3558	>	begin
3559	>	{ Get the field name }
3560	>	FieldAliasName := SourceQuery.Current[i].Name;
3561	>	SetString(DBAliasName, aliasname, aliasname_length);
3562	>	SetString(RelationName, relname, relname_length);
3563	>	SetString(FieldName, sqlname, sqlname_length);
3564	>	FAliasNameList[i] := DBAliasName;
3565	>	FieldSize := 0;
3566	>	FieldPrecision := 0;
3567	>	FieldNullable := SourceQuery.Current[i].IsNullable;
3568	>	CharSetSize := 0;
3569	>	CharSetName := '';
3570	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3571	>	FieldCodePage := CP_NONE;
3572	>	{$ENDIF}
3573	>	case sqltype and not 1 of
3574	>	{ All VARCHAR's must be converted to strings before recording
3575	>	their values }
3576	>	SQL_VARYING, SQL_TEXT:
3577	>	begin
3578	>	CharSetSize := FBase.GetCharSetSize(sqlsubtype and $FF);
3579	>	CharSetName := FBase.GetCharSetName(sqlsubtype and $FF);
3580	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3581	>	FieldCodePage := FBase.GetCodePage(sqlsubtype and $FF);
3582	>	{$ENDIF}
3583	>	{FieldSize is encoded for strings - see TIBStringField.SetSize for decode}
3584	>	FieldSize := sqllen;
3585	>	if CharSetSize = 2 then
3586	>	FieldType := ftWideString
3587	>	else
3588	>	FieldType := ftString;
3589	>	end;
3590	>	{ All Doubles/Floats should be cast to doubles }
3591	>	SQL_DOUBLE, SQL_FLOAT:
3592	>	FieldType := ftFloat;
3593	>	SQL_SHORT:
3594	>	begin
3595	>	if (sqlscale = 0) then
3596	>	FieldType := ftSmallInt
3597	>	else begin
3598	>	FieldType := ftBCD;
3599	>	FieldPrecision := 4;
3600	>	FieldSize := -sqlscale;
3601	>	end;
3602	>	end;
3603	>	SQL_LONG:
3604	>	begin
3605	>	if (sqlscale = 0) then
3606	>	FieldType := ftInteger
3607	>	else if (sqlscale >= (-4)) then
3608	>	begin
3609	>	FieldType := ftBCD;
3610	>	FieldPrecision := 9;
3611	>	FieldSize := -sqlscale;
3612	>	end
3613	>	else
3614	>	if Database.SQLDialect = 1 then
3615	>	FieldType := ftFloat
3616	>	else
3617	>	if (FieldCount > i) and (Fields[i] is TFloatField) then
3618	>	FieldType := ftFloat
3619	>	else
3620	>	begin
3621	>	FieldType := ftFMTBCD;
3622	>	FieldPrecision := 9;
3623	>	FieldSize := -sqlscale;
3624	>	end;
3625	>	end;
3626	>
3627	>	SQL_INT64:
3628	>	begin
3629	>	if (sqlscale = 0) then
3630	>	FieldType := ftLargeInt
3631	>	else if (sqlscale >= (-4)) then
3632	>	begin
3633	>	FieldType := ftBCD;
3634	>	FieldPrecision := 18;
3635	>	FieldSize := -sqlscale;
3636	>	end
3637	>	else
3638	>	FieldType := ftFloat
3639	>	end;
3640	>	SQL_TIMESTAMP: FieldType := ftDateTime;
3641	>	SQL_TYPE_TIME: FieldType := ftTime;
3642	>	SQL_TYPE_DATE: FieldType := ftDate;
3643	>	SQL_BLOB:
3644	>	begin
3645	>	FieldSize := sizeof (TISC_QUAD);
3646	>	if (sqlsubtype = 1) then
3647	>	begin
3648	>	if FBase.GetDefaultCharSetName <> '' then
3649	>	begin
3650	>	CharSetSize := FBase.GetDefaultCharSetSize;
3651	>	CharSetName := FBase.GetDefaultCharSetName;
3652	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3653	>	FieldCodePage := FBase.GetDefaultCodePage;
3654	>	{$ENDIF}
3655	>	end
3656	>	else
3657	>	if strpas(sqlname) <> '' then
3658	>	begin
3659	>	charSetID := GetBlobCharSetID(Database.Handle,Database.InternalTransaction.Handle,
3660	>	@relname,@sqlname);
3661	>	CharSetSize := FBase.GetCharSetSize(charSetID);
3662	>	CharSetName := FBase.GetCharSetName(charSetID);
3663	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3664	>	FieldCodePage := FBase.GetCodePage(charSetID);
3665	>	{$ENDIF}
3666	>	end
3667	>	else  {Complex SQL with no identifiable column and no connection default}
3668	>	begin
3669	>	CharSetName := '';
3670	>	CharSetSize := 1;
3671	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3672	>	FieldCodePage := CP_NONE;
3673	>	{$ENDIF}
3674	>	end;
3675	>	if CharSetSize = 2 then
3676	>	FieldType := ftWideMemo
3677	>	else
3678	>	FieldType := ftMemo;
3679	>	end
3680	>	else
3681	>	FieldType := ftBlob;
3682	>	end;
3683	>	SQL_ARRAY:
3684	>	begin
3685	>	FieldSize := sizeof (TISC_QUAD);
3686	>	FieldType := ftUnknown;
3687	>	end;
3688	>	SQL_BOOLEAN:
3689	>	FieldType:= ftBoolean;
3690	>	else
3691	>	FieldType := ftUnknown;
3692	>	end;
3693	>	FieldPosition := i + 1;
3694	>	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
3695	>	begin
3696	>	FMappedFieldPosition[FieldIndex] := FieldPosition;
3697	>	Inc(FieldIndex);
3698	>	with TIBFieldDef.Create(FieldDefs,'',FieldType,0,False,FieldDefs.Count+1) do
3699	>	begin
3700	>	Name := FieldAliasName;
3701	>	FAliasNameMap[FieldNo-1] := DBAliasName;
3702	>	Size := FieldSize;
3703	>	Precision := FieldPrecision;
3704	>	Required := not FieldNullable;
3705	>	InternalCalcField := False;
3706	>	CharacterSetSize := CharSetSize;
3707	>	CharacterSetName := CharSetName;
3708	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3709	>	CodePage := FieldCodePage;
3710	>	{$ENDIF}
3711	>	if (FieldName <> '') and (RelationName <> '') then
3712	>	begin
3713	>	if Has_COMPUTED_BLR(RelationName, FieldName) then
3714	>	begin
3715	>	Attributes := [faReadOnly];
3716	>	InternalCalcField := True;
3717	>	FNeedsRefresh := True;
3718	>	end
3719	>	else
3720	>	begin
3721	>	if Has_DEFAULT_VALUE(RelationName, FieldName) then
3722	>	begin
3723	>	if not FieldNullable then
3724	>	Attributes := [faRequired];
3725	>	end
3726	>	else
3727	>	FNeedsRefresh := True;
3728	>	end;
3729	>	end;
3730	>	end;
3731	>	end;
3732	>	end;
3733	>	finally
3734	>	Query.free;
3735	>	FreeNodes;
3736	>	Database.InternalTransaction.Commit;
3737	>	FieldDefs.EndUpdate;
3738	>	end;
3739	>	end;
3740	>
3741	>	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
3742	>	begin
3743	>	CopyRecordBuffer(FModelBuffer, Buffer);
3744	>	end;
3745	>
3746	>	procedure TIBCustomDataSet.InternalLast;
3747	>	var
3748	>	Buffer: PChar;
3749	>	begin
3750	>	if (FQSelect.EOF) then
3751	>	FCurrentRecord := FRecordCount
3752	>	else begin
3753	>	Buffer := AllocRecordBuffer;
3754	>	try
3755	>	while FQSelect.Next <> nil do
3756	>	begin
3757	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3758	>	Inc(FRecordCount);
3759	>	end;
3760	>	FCurrentRecord := FRecordCount;
3761	>	finally
3762	>	FreeRecordBuffer(Buffer);
3763	>	end;
3764	>	end;
3765	>	end;
3766	>
3767	>	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
3768	>	var
3769	>	i: Integer;
3770	>	cur_param: TIBXSQLVAR;
3771	>	cur_field: TField;
3772	>	s: TStream;
3773	>	begin
3774	>	if FQSelect.SQL.Text = '' then
3775	>	IBError(ibxeEmptyQuery, [nil]);
3776	>	if not FInternalPrepared then
3777	>	InternalPrepare;
3778	>	if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
3779	>	begin
3780	>	for i := 0 to SQLParams.Count - 1 do
3781	>	begin
3782	>	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
3783	>	cur_param := SQLParams[i];
3784	>	if (cur_field <> nil) then begin
3785	>	if (cur_field.IsNull) then
3786	>	cur_param.IsNull := True
3787	>	else case cur_field.DataType of
3788	>	ftString:
3789	>	cur_param.AsString := cur_field.AsString;
3790	>	ftBoolean:
3791	>	cur_param.AsBoolean := cur_field.AsBoolean;
3792	>	ftSmallint, ftWord:
3793	>	cur_param.AsShort := cur_field.AsInteger;
3794	>	ftInteger:
3795	>	cur_param.AsLong := cur_field.AsInteger;
3796	>	ftLargeInt:
3797	>	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
3798	>	ftFloat, ftCurrency:
3799	>	cur_param.AsDouble := cur_field.AsFloat;
3800	>	ftBCD:
3801	>	cur_param.AsCurrency := cur_field.AsCurrency;
3802	>	ftDate:
3803	>	cur_param.AsDate := cur_field.AsDateTime;
3804	>	ftTime:
3805	>	cur_param.AsTime := cur_field.AsDateTime;
3806	>	ftDateTime:
3807	>	cur_param.AsDateTime := cur_field.AsDateTime;
3808	>	ftBlob, ftMemo:
3809	>	begin
3810	>	s := nil;
3811	>	try
3812	>	s := DataSource.DataSet.
3813	>	CreateBlobStream(cur_field, bmRead);
3814	>	cur_param.LoadFromStream(s);
3815	>	finally
3816	>	s.free;
3817	>	end;
3818	>	end;
3819	>	else
3820	>	IBError(ibxeNotSupported, [nil]);
3821	>	end;
3822	>	end;
3823	>	end;
3824	>	end;
3825	>	end;
3826	>
3827	>	procedure TIBCustomDataSet.ReQuery;
3828	>	begin
3829	>	FQSelect.Close;
3830	>	ClearBlobCache;
3831	>	FCurrentRecord := -1;
3832	>	FRecordCount := 0;
3833	>	FDeletedRecords := 0;
3834	>	FBPos := 0;
3835	>	FOBPos := 0;
3836	>	FBEnd := 0;
3837	>	FOBEnd := 0;
3838	>	FQSelect.Close;
3839	>	FQSelect.ExecQuery;
3840	>	FOpen := FQSelect.Open;
3841	>	First;
3842	>	end;
3843	>
3844	>	procedure TIBCustomDataSet.InternalOpen;
3845	>
3846	>	function RecordDataLength(n: Integer): Long;
3847	>	begin
3848	>	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
3849	>	end;
3850	>
3851	>	function GetFieldDef(aFieldNo: integer): TIBFieldDef;
3852	>	var i: integer;
3853	>	begin
3854	>	Result := nil;
3855	>	for i := 0 to FieldDefs.Count - 1 do
3856	>	if FieldDefs[i].FieldNo = aFieldNo then
3857	>	begin
3858	>	Result := TIBFieldDef(FieldDefs[i]);
3859	>	break;
3860	>	end;
3861	>	end;
3862	>
3863	>	procedure SetExtendedProperties;
3864	>	var i: integer;
3865	>	IBFieldDef: TIBFieldDef;
3866	>	begin
3867	>	for i := 0 to Fields.Count - 1 do
3868	>	if Fields[i].FieldNo > 0 then
3869	>	begin
3870	>	if(Fields[i] is TIBStringField) then
3871	>	with TIBStringField(Fields[i]) do
3872	>	begin
3873	>	IBFieldDef := GetFieldDef(FieldNo);
3874	>	if IBFieldDef <> nil then
3875	>	begin
3876	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
3877	>	CharacterSetName := IBFieldDef.CharacterSetName;
3878	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3879	>	CodePage := IBFieldDef.CodePage;
3880	>	{$ENDIF}
3881	>	end;
3882	>	end
3883	>	else
3884	>	if(Fields[i] is TIBWideStringField) then
3885	>	with TIBWideStringField(Fields[i]) do
3886	>	begin
3887	>	IBFieldDef := GetFieldDef(FieldNo);
3888	>	if IBFieldDef <> nil then
3889	>	begin
3890	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
3891	>	CharacterSetName := IBFieldDef.CharacterSetName;
3892	>	end;
3893	>	end
3894	>	else
3895	>	if(Fields[i] is TIBMemoField) then
3896	>	with TIBMemoField(Fields[i]) do
3897	>	begin
3898	>	IBFieldDef := GetFieldDef(FieldNo);
3899	>	if IBFieldDef <> nil then
3900	>	begin
3901	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
3902	>	CharacterSetName := IBFieldDef.CharacterSetName;
3903	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3904	>	CodePage := IBFieldDef.CodePage;
3905	>	{$ENDIF}
3906	>	end;
3907	>	end
3908	>	else
3909	>	if(Fields[i] is TIBWideMemoField) then
3910	>	with TIBWideMemoField(Fields[i]) do
3911	>	begin
3912	>	IBFieldDef := GetFieldDef(FieldNo);
3913	>	if IBFieldDef <> nil then
3914	>	begin
3915	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
3916	>	CharacterSetName := IBFieldDef.CharacterSetName;
3917	>	end;
3918	>	end
3919	>	end
3920	>	end;
3921	>
3922	>	begin
3923	>	FBase.SetCursor;
3924	>	try
3925	>	ActivateConnection;
3926	>	ActivateTransaction;
3927	>	if FQSelect.SQL.Text = '' then
3928	>	IBError(ibxeEmptyQuery, [nil]);
3929	>	if not FInternalPrepared then
3930	>	InternalPrepare;
3931	>	if FQSelect.SQLType = SQLSelect then
3932	>	begin
3933	>	if DefaultFields then
3934	>	CreateFields;
3935	>	BindFields(True);
3936	>	SetExtendedProperties;
3937	>	FCurrentRecord := -1;
3938	>	FQSelect.ExecQuery;
3939	>	FOpen := FQSelect.Open;
3940	>
3941	>	{ Initialize offsets, buffer sizes, etc...
3942	>	1. Initially FRecordSize is just the "RecordDataLength".
3943	>	2. Allocate a "model" buffer and do a dummy fetch
3944	>	3. After the dummy fetch, FRecordSize will be appropriately
3945	>	adjusted to reflect the additional "weight" of the field
3946	>	data.
3947	>	4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize.
3948	>	5. Now, with the BufferSize available, allocate memory for chunks of records
3949	>	6. Re-allocate the model buffer, accounting for the new
3950	>	FRecordBufferSize.
3951	>	7. Finally, calls to AllocRecordBuffer will work!.
3952	>	}
3953	>	{Step 1}
3954	>	FRecordSize := RecordDataLength(FQSelect.Current.Count);
3955	>	{Step 2, 3}
3956	>	IBAlloc(FModelBuffer, 0, FRecordSize);
3957	>	FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer);
3958	>	{Step 4}
3959	>	FCalcFieldsOffset := FRecordSize;
3960	>	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
3961	>	FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
3962	>	{Step 5}
3963	>	if UniDirectional then
3964	>	FBufferChunkSize := FRecordBufferSize * UniCache
3965	>	else
3966	>	FBufferChunkSize := FRecordBufferSize * BufferChunks;
3967	>	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
3968	>	if FCachedUpdates or (csReading in ComponentState) then
3969	>	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
3970	>	FBPos := 0;
3971	>	FOBPos := 0;
3972	>	FBEnd := 0;
3973	>	FOBEnd := 0;
3974	>	FCacheSize := FBufferChunkSize;
3975	>	FOldCacheSize := FBufferChunkSize;
3976	>	{Step 6}
3977	>	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count),
3978	>	FRecordBufferSize);
3979	>	{Step 7}
3980	>	FOldBuffer := AllocRecordBuffer;
3981	>	end
3982	>	else
3983	>	FQSelect.ExecQuery;
3984	>	finally
3985	>	FBase.RestoreCursor;
3986	>	end;
3987	>	end;
3988	>
3989	>	procedure TIBCustomDataSet.InternalPost;
3990	>	var
3991	>	Qry: TIBSQL;
3992	>	Buff: PChar;
3993	>	bInserting: Boolean;
3994	>	begin
3995	>	FBase.SetCursor;
3996	>	try
3997	>	Buff := GetActiveBuf;
3998	>	CheckEditState;
3999	>	AdjustRecordOnInsert(Buff);
4000	>	if (State = dsInsert) then
4001	>	begin
4002	>	bInserting := True;
4003	>	Qry := FQInsert;
4004	>	PRecordData(Buff)^.rdUpdateStatus := usInserted;
4005	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
4006	>	WriteRecordCache(FRecordCount, Buff);
4007	>	FCurrentRecord := FRecordCount;
4008	>	end
4009	>	else begin
4010	>	bInserting := False;
4011	>	Qry := FQModify;
4012	>	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
4013	>	begin
4014	>	PRecordData(Buff)^.rdUpdateStatus := usModified;
4015	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
4016	>	end
4017	>	else if PRecordData(Buff)^.
4018	>	rdCachedUpdateStatus = cusUninserted then
4019	>	begin
4020	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
4021	>	Dec(FDeletedRecords);
4022	>	end;
4023	>	end;
4024	>	if (not CachedUpdates) then
4025	>	InternalPostRecord(Qry, Buff)
4026	>	else begin
4027	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
4028	>	FUpdatesPending := True;
4029	>	end;
4030	>	if bInserting then
4031	>	Inc(FRecordCount);
4032	>	finally
4033	>	FBase.RestoreCursor;
4034	>	end;
4035	>	end;
4036	>
4037	>	procedure TIBCustomDataSet.InternalRefresh;
4038	>	begin
4039	>	inherited InternalRefresh;
4040	>	InternalRefreshRow;
4041	>	end;
4042	>
4043	>	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
4044	>	begin
4045	>	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
4046	>	end;
4047	>
4048	>	function TIBCustomDataSet.IsCursorOpen: Boolean;
4049	>	begin
4050	>	result := FOpen;
4051	>	end;
4052	>
4053	>	procedure TIBCustomDataSet.Loaded;
4054	>	begin
4055	>	if assigned(FQSelect) then
4056	>	FBaseSQLSelect.assign(FQSelect.SQL);
4057	>	inherited Loaded;
4058	>	end;
4059	>
4060	>	procedure TIBCustomDataSet.Post;
4061	>	var CancelPost: boolean;
4062	>	begin
4063	>	CancelPost := false;
4064	>	if assigned(FOnValidatePost) then
4065	>	OnValidatePost(self,CancelPost);
4066	>	if CancelPost then
4067	>	Cancel
4068	>	else
4069	>	inherited Post;
4070	>	end;
4071	>
4072	>	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
4073	>	Options: TLocateOptions): Boolean;
4074	>	var
4075	>	{$IFDEF NEW_TBOOKMARK }
4076	>	CurBookmark: TBookmark;
4077	>	{$ELSE}
4078	>	CurBookmark: string;
4079	>	{$ENDIF}
4080	>	begin
4081	>	DisableControls;
4082	>	try
4083	>	CurBookmark := Bookmark;
4084	>	First;
4085	>	result := InternalLocate(KeyFields, KeyValues, Options);
4086	>	if not result then
4087	>	Bookmark := CurBookmark;
4088	>	finally
4089	>	EnableControls;
4090	>	end;
4091	>	end;
4092	>
4093	>	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
4094	>	const ResultFields: string): Variant;
4095	>	var
4096	>	fl: TList;
4097	>	{$IFDEF NEW_TBOOKMARK }
4098	>	CurBookmark: TBookmark;
4099	>	{$ELSE}
4100	>	CurBookmark: string;
4101	>	{$ENDIF}
4102	>	begin
4103	>	DisableControls;
4104	>	fl := TList.Create;
4105	>	CurBookmark := Bookmark;
4106	>	try
4107	>	First;
4108	>	if InternalLocate(KeyFields, KeyValues, []) then
4109	>	begin
4110	>	if (ResultFields <> '') then
4111	>	result := FieldValues[ResultFields]
4112	>	else
4113	>	result := NULL;
4114	>	end
4115	>	else
4116	>	result := Null;
4117	>	finally
4118	>	Bookmark := CurBookmark;
4119	>	fl.Free;
4120	>	EnableControls;
4121	>	end;
4122	>	end;
4123	>
4124	>	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
4125	>	begin
4126	>	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
4127	>	end;
4128	>
4129	>	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
4130	>	begin
4131	>	PRecordData(Buffer)^.rdBookmarkFlag := Value;
4132	>	end;
4133	>
4134	>	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
4135	>	begin
4136	>	if not Value and FCachedUpdates then
4137	>	CancelUpdates;
4138	>	if (not (csReading in ComponentState)) and Value then
4139	>	CheckDatasetClosed;
4140	>	FCachedUpdates := Value;
4141	>	end;
4142	>
4143	>	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
4144	>	begin
4145	>	if IsLinkedTo(Value) then
4146	>	IBError(ibxeCircularReference, [nil]);
4147	>	if FDataLink <> nil then
4148	>	FDataLink.DataSource := Value;
4149	>	end;
4150	>
4151	>	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
4152	>	var
4153	>	Buff, TmpBuff: PChar;
4154	>	MappedFieldPos: integer;
4155	>	begin
4156	>	Buff := GetActiveBuf;
4157	>	if Field.FieldNo < 0 then
4158	>	begin
4159	>	TmpBuff := Buff + FRecordSize + Field.Offset;
4160	>	Boolean(TmpBuff[0]) := LongBool(Buffer);
4161	>	if Boolean(TmpBuff[0]) then
4162	>	Move(Buffer^, TmpBuff[1], Field.DataSize);
4163	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
4164	>	end
4165	>	else begin
4166	>	CheckEditState;
4167	>	with PRecordData(Buff)^ do
4168	>	begin
4169	>	{ If inserting, Adjust record position }
4170	>	AdjustRecordOnInsert(Buff);
4171	>	MappedFieldPos := FMappedFieldPosition[Field.FieldNo - 1];
4172	>	if (MappedFieldPos > 0) and
4173	>	(MappedFieldPos <= rdFieldCount) then
4174	>	begin
4175	>	Field.Validate(Buffer);
4176	>	if (Buffer = nil) or
4177	>	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
4178	>	rdFields[MappedFieldPos].fdIsNull := True
4179	>	else begin
4180	>	Move(Buffer^, Buff[rdFields[MappedFieldPos].fdDataOfs],
4181	>	rdFields[MappedFieldPos].fdDataSize);
4182	>	if (rdFields[MappedFieldPos].fdDataType = SQL_TEXT) or
4183	>	(rdFields[MappedFieldPos].fdDataType = SQL_VARYING) then
4184	>	rdFields[MappedFieldPos].fdDataLength := StrLen(PChar(Buffer));
4185	>	rdFields[MappedFieldPos].fdIsNull := False;
4186	>	if rdUpdateStatus = usUnmodified then
4187	>	begin
4188	>	if CachedUpdates then
4189	>	begin
4190	>	FUpdatesPending := True;
4191	>	if State = dsInsert then
4192	>	rdCachedUpdateStatus := cusInserted
4193	>	else if State = dsEdit then
4194	>	rdCachedUpdateStatus := cusModified;
4195	>	end;
4196	>
4197	>	if State = dsInsert then
4198	>	rdUpdateStatus := usInserted
4199	>	else
4200	>	rdUpdateStatus := usModified;
4201	>	end;
4202	>	WriteRecordCache(rdRecordNumber, Buff);
4203	>	SetModified(True);
4204	>	end;
4205	>	end;
4206	>	end;
4207	>	end;
4208	>	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
4209	>	DataEvent(deFieldChange, PtrInt(Field));
4210	>	end;
4211	>
4212	>	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
4213	>	begin
4214	>	CheckBrowseMode;
4215	>	if (Value < 1) then
4216	>	Value := 1
4217	>	else if Value > FRecordCount then
4218	>	begin
4219	>	InternalLast;
4220	>	Value := Min(FRecordCount, Value);
4221	>	end;
4222	>	if (Value <> RecNo) then
4223	>	begin
4224	>	DoBeforeScroll;
4225	>	FCurrentRecord := Value - 1;
4226	>	Resync([]);
4227	>	DoAfterScroll;
4228	>	end;
4229	>	end;
4230	>
4231	>	procedure TIBCustomDataSet.Disconnect;
4232	>	begin
4233	>	Close;
4234	>	InternalUnPrepare;
4235	>	end;
4236	>
4237	>	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
4238	>	begin
4239	>	if not CanModify then
4240	>	IBError(ibxeCannotUpdate, [nil])
4241	>	else
4242	>	FUpdateMode := Value;
4243	>	end;
4244	>
4245	>
4246	>	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
4247	>	begin
4248	>	if Value <> FUpdateObject then
4249	>	begin
4250	>	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
4251	>	FUpdateObject.DataSet := nil;
4252	>	FUpdateObject := Value;
4253	>	if Assigned(FUpdateObject) then
4254	>	begin
4255	>	if Assigned(FUpdateObject.DataSet) and
4256	>	(FUpdateObject.DataSet <> Self) then
4257	>	FUpdateObject.DataSet.UpdateObject := nil;
4258	>	FUpdateObject.DataSet := Self;
4259	>	end;
4260	>	end;
4261	>	end;
4262	>
4263	>	function TIBCustomDataSet.ConstraintsStored: Boolean;
4264	>	begin
4265	>	Result := Constraints.Count > 0;
4266	>	end;
4267	>
4268	>	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
4269	>	begin
4270	>	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
4271	>	end;
4272	>
4273	>	procedure TIBCustomDataSet.ClearIBLinks;
4274	>	var i: integer;
4275	>	begin
4276	>	for i := FIBLinks.Count - 1 downto 0 do
4277	>	TIBControlLink(FIBLinks[i]).IBDataSet := nil;
4278	>	end;
4279	>
4280	>
4281	>	procedure TIBCustomDataSet.InternalUnPrepare;
4282	>	begin
4283	>	if FInternalPrepared then
4284	>	begin
4285	>	CheckDatasetClosed;
4286	>	FieldDefs.Clear;
4287	>	FieldDefs.Updated := false;
4288	>	FInternalPrepared := False;
4289	>	Setlength(FAliasNameList,0);
4290	>	end;
4291	>	end;
4292	>
4293	>	procedure TIBCustomDataSet.InternalExecQuery;
4294	>	var
4295	>	DidActivate: Boolean;
4296	>	begin
4297	>	DidActivate := False;
4298	>	FBase.SetCursor;
4299	>	try
4300	>	ActivateConnection;
4301	>	DidActivate := ActivateTransaction;
4302	>	if FQSelect.SQL.Text = '' then
4303	>	IBError(ibxeEmptyQuery, [nil]);
4304	>	if not FInternalPrepared then
4305	>	InternalPrepare;
4306	>	if FQSelect.SQLType = SQLSelect then
4307	>	begin
4308	>	IBError(ibxeIsASelectStatement, [nil]);
4309	>	end
4310	>	else
4311	>	FQSelect.ExecQuery;
4312	>	finally
4313	>	if DidActivate then
4314	>	DeactivateTransaction;
4315	>	FBase.RestoreCursor;
4316	>	end;
4317	>	end;
4318	>
4319	>	function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE;
4320	>	begin
4321	>	Result := FQSelect.Handle;
4322	>	end;
4323	>
4324	>	function TIBCustomDataSet.GetParser: TSelectSQLParser;
4325	>	begin
4326	>	if not assigned(FParser) then
4327	>	FParser := CreateParser;
4328	>	Result := FParser
4329	>	end;
4330	>
4331	>	procedure TIBCustomDataSet.ResetParser;
4332	>	begin
4333	>	if assigned(FParser) then
4334	>	begin
4335	>	FParser.Free;
4336	>	FParser := nil;
4337	>	FQSelect.OnSQLChanged := nil; {Do not react to change}
4338	>	try
4339	>	FQSelect.SQL.Assign(FBaseSQLSelect);
4340	>	finally
4341	>	FQSelect.OnSQLChanged := SQLChanged;
4342	>	end;
4343	>	end;
4344	>	end;
4345	>
4346	>	function TIBCustomDataSet.HasParser: boolean;
4347	>	begin
4348	>	Result := not (csDesigning in ComponentState) and (FParser <> nil)
4349	>	end;
4350	>
4351	>	procedure TIBCustomDataSet.SetGenerateParamNames(AValue: Boolean);
4352	>	begin
4353	>	if FGenerateParamNames = AValue then Exit;
4354	>	FGenerateParamNames := AValue;
4355	>	Disconnect
4356	>	end;
4357	>
4358	>	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
4359	>	begin
4360	>	inherited InitRecord(Buffer);
4361	>	with PRecordData(Buffer)^ do
4362	>	begin
4363	>	rdUpdateStatus := TUpdateStatus(usInserted);
4364	>	rdBookMarkFlag := bfInserted;
4365	>	rdRecordNumber := -1;
4366	>	end;
4367	>	end;
4368	>
4369	>	procedure TIBCustomDataSet.InternalInsert;
4370	>	begin
4371	>	CursorPosChanged;
4372	>	end;
4373	>
4374	>	{ TIBDataSet IProviderSupport }
4375	>
4376	>	(*procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
4377	>	begin
4378	>	if Commit then
4379	>	Transaction.Commit else
4380	>	Transaction.Rollback;
4381	>	end;
4382	>
4383	>	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
4384	>	ResultSet: Pointer = nil): Integer;
4385	>	var
4386	>	FQuery: TIBQuery;
4387	>	begin
4388	>	if Assigned(ResultSet) then
4389	>	begin
4390	>	TDataSet(ResultSet^) := TIBQuery.Create(nil);
4391	>	with TIBQuery(ResultSet^) do
4392	>	begin
4393	>	SQL.Text := ASQL;
4394	>	Params.Assign(AParams);
4395	>	Open;
4396	>	Result := RowsAffected;
4397	>	end;
4398	>	end
4399	>	else
4400	>	begin
4401	>	FQuery := TIBQuery.Create(nil);
4402	>	try
4403	>	FQuery.Database := Database;
4404	>	FQuery.Transaction := Transaction;
4405	>	FQuery.GenerateParamNames := True;
4406	>	FQuery.SQL.Text := ASQL;
4407	>	FQuery.Params.Assign(AParams);
4408	>	FQuery.ExecSQL;
4409	>	Result := FQuery.RowsAffected;
4410	>	finally
4411	>	FQuery.Free;
4412	>	end;
4413	>	end;
4414	>	end;
4415	>
4416	>	function TIBCustomDataSet.PSGetQuoteChar: string;
4417	>	begin
4418	>	if Database.SQLDialect = 3 then
4419	>	Result := '"' else
4420	>	Result := '';
4421	>	end;
4422	>
4423	>	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
4424	>	var
4425	>	PrevErr: Integer;
4426	>	begin
4427	>	if Prev <> nil then
4428	>	PrevErr := Prev.ErrorCode else
4429	>	PrevErr := 0;
4430	>	if E is EIBError then
4431	>	with EIBError(E) do
4432	>	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
4433	>	Result := inherited PSGetUpdateException(E, Prev);
4434	>	end;
4435	>
4436	>	function TIBCustomDataSet.PSInTransaction: Boolean;
4437	>	begin
4438	>	Result := Transaction.InTransaction;
4439	>	end;
4440	>
4441	>	function TIBCustomDataSet.PSIsSQLBased: Boolean;
4442	>	begin
4443	>	Result := True;
4444	>	end;
4445	>
4446	>	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
4447	>	begin
4448	>	Result := True;
4449	>	end;
4450	>
4451	>	procedure TIBCustomDataSet.PSReset;
4452	>	begin
4453	>	inherited PSReset;
4454	>	if Active then
4455	>	begin
4456	>	Close;
4457	>	Open;
4458	>	end;
4459	>	end;
4460	>
4461	>	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
4462	>	var
4463	>	UpdateAction: TIBUpdateAction;
4464	>	SQL: string;
4465	>	Params: TParams;
4466	>
4467	>	procedure AssignParams(DataSet: TDataSet; Params: TParams);
4468	>	var
4469	>	I: Integer;
4470	>	Old: Boolean;
4471	>	Param: TParam;
4472	>	PName: string;
4473	>	Field: TField;
4474	>	Value: Variant;
4475	>	begin
4476	>	for I := 0 to Params.Count - 1 do
4477	>	begin
4478	>	Param := Params[I];
4479	>	PName := Param.Name;
4480	>	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
4481	>	if Old then System.Delete(PName, 1, 4);
4482	>	Field := DataSet.FindField(PName);
4483	>	if not Assigned(Field) then Continue;
4484	>	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
4485	>	begin
4486	>	Value := Field.NewValue;
4487	>	if VarIsEmpty(Value) then Value := Field.OldValue;
4488	>	Param.AssignFieldValue(Field, Value);
4489	>	end;
4490	>	end;
4491	>	end;
4492	>
4493	>	begin
4494	>	Result := False;
4495	>	if Assigned(OnUpdateRecord) then
4496	>	begin
4497	>	UpdateAction := uaFail;
4498	>	if Assigned(FOnUpdateRecord) then
4499	>	begin
4500	>	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
4501	>	Result := UpdateAction = uaApplied;
4502	>	end;
4503	>	end
4504	>	else if Assigned(FUpdateObject) then
4505	>	begin
4506	>	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
4507	>	if SQL <> '' then
4508	>	begin
4509	>	Params := TParams.Create;
4510	>	try
4511	>	Params.ParseSQL(SQL, True);
4512	>	AssignParams(Delta, Params);
4513	>	if PSExecuteStatement(SQL, Params) = 0 then
4514	>	IBError(ibxeNoRecordsAffected, [nil]);
4515	>	Result := True;
4516	>	finally
4517	>	Params.Free;
4518	>	end;
4519	>	end;
4520	>	end;
4521	>	end;
4522	>
4523	>	procedure TIBCustomDataSet.PSStartTransaction;
4524	>	begin
4525	>	ActivateConnection;
4526	>	Transaction.StartTransaction;
4527	>	end;
4528	>
4529	>	function TIBCustomDataSet.PSGetTableName: string;
4530	>	begin
4531	>	//  if not FInternalPrepared then
4532	>	//    InternalPrepare;
4533	>	{ It is possible for the FQSelectSQL to be unprepared
4534	>	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
4535	>	So check the Prepared of the SelectSQL instead }
4536	>	if not FQSelect.Prepared then
4537	>	FQSelect.Prepare;
4538	>	Result := FQSelect.UniqueRelationName;
4539	>	end;*)
4540	>
4541	>	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
4542	>	begin
4543	>	InternalBatchInput(InputObject);
4544	>	end;
4545	>
4546	>	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
4547	>	begin
4548	>	InternalBatchOutput(OutputObject);
4549	>	end;
4550	>
4551	>	procedure TIBDataSet.ExecSQL;
4552	>	begin
4553	>	InternalExecQuery;
4554	>	end;
4555	>
4556	>	procedure TIBDataSet.Prepare;
4557	>	begin
4558	>	InternalPrepare;
4559	>	end;
4560	>
4561	>	procedure TIBDataSet.UnPrepare;
4562	>	begin
4563	>	InternalUnPrepare;
4564	>	end;
4565	>
4566	>	function TIBDataSet.GetPrepared: Boolean;
4567	>	begin
4568	>	Result := InternalPrepared;
4569	>	end;
4570	>
4571	>	procedure TIBDataSet.InternalOpen;
4572	>	begin
4573	>	ActivateConnection;
4574	>	ActivateTransaction;
4575	>	InternalSetParamsFromCursor;
4576	>	Inherited InternalOpen;
4577	>	end;
4578	>
4579	>	procedure TIBDataSet.SetFiltered(Value: Boolean);
4580	>	begin
4581	>	if(Filtered <> Value) then
4582	>	begin
4583	>	inherited SetFiltered(value);
4584	>	if Active then
4585	>	begin
4586	>	Close;
4587	>	Open;
4588	>	end;
4589	>	end
4590	>	else
4591	>	inherited SetFiltered(value);
4592	>	end;
4593	>
4594	>	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
4595	>	begin
4596	>	Result := false;
4597	>	if not Assigned(Bookmark) then
4598	>	exit;
4599	>	Result := PInteger(Bookmark)^ < FRecordCount;
4600	>	end;
4601	>
4602	>	function TIBCustomDataSet.GetFieldData(Field: TField;
4603	>	Buffer: Pointer): Boolean;
4604	>	{$IFDEF TBCDFIELD_IS_BCD}
4605	>	var
4606	>	lTempCurr : System.Currency;
4607	>	begin
4608	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4609	>	begin
4610	>	Result := InternalGetFieldData(Field, @lTempCurr);
4611	>	if Result then
4612	>	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
4613	>	end
4614	>	else
4615	>	{$ELSE}
4616	>	begin
4617	>	{$ENDIF}
4618	>	Result := InternalGetFieldData(Field, Buffer);
4619	>	end;
4620	>
4621	>	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
4622	>	NativeFormat: Boolean): Boolean;
4623	>	begin
4624	>	if (Field.DataType = ftBCD) and not NativeFormat then
4625	>	Result := InternalGetFieldData(Field, Buffer)
4626	>	else
4627	>	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
4628	>	end;
4629	>
4630	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
4631	>	{$IFDEF TDBDFIELD_IS_BCD}
4632	>	var
4633	>	lTempCurr : System.Currency;
4634	>	begin
4635	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4636	>	begin
4637	>	BCDToCurr(TBCD(Buffer^), lTempCurr);
4638	>	InternalSetFieldData(Field, @lTempCurr);
4639	>	end
4640	>	else
4641	>	{$ELSE}
4642	>	begin
4643	>	{$ENDIF}
4644	>	InternalSetFieldData(Field, Buffer);
4645	>	end;
4646	>
4647	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
4648	>	NativeFormat: Boolean);
4649	>	begin
4650	>	if (not NativeFormat) and (Field.DataType = ftBCD) then
4651	>	InternalSetfieldData(Field, Buffer)
4652	>	else
4653	>	inherited SetFieldData(Field, buffer, NativeFormat);
4654	>	end;
4655	>
4656	>	{ TIBDataSetUpdateObject }
4657	>
4658	>	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
4659	>	begin
4660	>	inherited Create(AOwner);
4661	>	FRefreshSQL := TStringList.Create;
4662	>	end;
4663	>
4664	>	destructor TIBDataSetUpdateObject.Destroy;
4665	>	begin
4666	>	FRefreshSQL.Free;
4667	>	inherited Destroy;
4668	>	end;
4669	>
4670	>	procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings);
4671	>	begin
4672	>	FRefreshSQL.Assign(Value);
4673	>	end;
4674	>
4675	>	procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
4676	>	begin
4677	>	if not Assigned(DataSet) then Exit;
4678	>	DataSet.SetInternalSQLParams(Query, buff);
4679	>	end;
4680	>
4681	>	function TIBDSBlobStream.GetSize: Int64;
4682	>	begin
4683	>	Result := FBlobStream.BlobSize;
4684	>	end;
4685	>
4686	>	{ TIBDSBlobStream }
4687	>	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
4688	>	Mode: TBlobStreamMode);
4689	>	begin
4690	>	FField := AField;
4691	>	FBlobStream := ABlobStream;
4692	>	FBlobStream.Seek(0, soFromBeginning);
4693	>	if (Mode = bmWrite) then
4694	>	begin
4695	>	FBlobStream.Truncate;
4696	>	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4697	>	TBlobField(FField).Modified := true;
4698	>	FHasWritten := true;
4699	>	end;
4700	>	end;
4701	>
4702	>	destructor TIBDSBlobStream.Destroy;
4703	>	begin
4704	>	if FHasWritten then
4705	>	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4706	>	inherited Destroy;
4707	>	end;
4708	>
4709	>	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
4710	>	begin
4711	>	result := FBlobStream.Read(Buffer, Count);
4712	>	end;
4713	>
4714	>	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
4715	>	begin
4716	>	result := FBlobStream.Seek(Offset, Origin);
4717	>	end;
4718	>
4719	>	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
4720	>	begin
4721	>	FBlobStream.SetSize(NewSize);
4722	>	end;
4723	>
4724	>	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
4725	>	begin
4726	>	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
4727	>	IBError(ibxeNotEditing, [nil]);
4728	>	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4729	>	TBlobField(FField).Modified := true;
4730	>	result := FBlobStream.Write(Buffer, Count);
4731	>	FHasWritten := true;
4732	>	{  TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4733	>	Removed as this caused a seek to beginning of the blob stream thus corrupting
4734	>	the blob stream. Moved to the destructor i.e. called after blob written}
4735	>	end;
4736	>
4737	>	{ TIBGenerator }
4738	>
4739	>	procedure TIBGenerator.SetIncrement(const AValue: integer);
4740	>	begin
4741	>	if AValue < 0 then
4742	>	raise Exception.Create('A Generator Increment cannot be negative');
4743	>	FIncrement := AValue
4744	>	end;
4745	>
4746	>	function TIBGenerator.GetNextValue(ADatabase: TIBDatabase;
4747	>	ATransaction: TIBTransaction): integer;
4748	>	begin
4749	>	with TIBSQL.Create(nil) do
4750	>	try
4751	>	Database := ADatabase;
4752	>	Transaction := ATransaction;
4753	>	if not assigned(Database) then
4754	>	IBError(ibxeCannotSetDatabase,[]);
4755	>	if not assigned(Transaction) then
4756	>	IBError(ibxeCannotSetTransaction,[]);
4757	>	with Transaction do
4758	>	if not InTransaction then StartTransaction;
4759	>	SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]);
4760	>	Prepare;
4761	>	ExecQuery;
4762	>	try
4763	>	Result := FieldByName('ID').AsInteger
4764	>	finally
4765	>	Close
4766	>	end;
4767	>	finally
4768	>	Free
4769	>	end;
4770	>	end;
4771	>
4772	>	constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
4773	>	begin
4774	>	FOwner := Owner;
4775	>	FIncrement := 1;
4776	>	end;
4777	>
4778	>
4779	>	procedure TIBGenerator.Apply;
4780	>	begin
4781	>	if (FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then
4782	>	Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction);
4783	>	end;
4784	>
4785	>
4786	>	end.

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