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

Comparing ibx/trunk/runtime/IBCustomDataSet.pas (file contents):
Revision 1 by tony, Mon Jul 31 16:43:00 2000 UTC vs.
Revision 31 by tony, Tue Jul 14 15:31:25 2015 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	<	{************************************************************************}
28	<
29	<	unit IBCustomDataSet;
30	<
31	<	interface
32	<
33	<	uses
34	<	Windows, SysUtils, Classes, Forms, Controls, StdVCL,
35	<	IBExternals, IB, IBHeader, IBDatabase, IBSQL, Db,
36	<	IBUtils, IBBlob;
37	<
38	<	const
39	<	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
40	<	UniCache           =  2;     { Uni-directional cache is 2 records big }
41	<
42	<	type
43	<	TIBCustomDataSet = class;
44	<	TIBDataSet = class;
45	<
46	<	TIBDataSetUpdateObject = class(TComponent)
47	<	private
48	<	FRefreshSQL: TStrings;
49	<	procedure SetRefreshSQL(value: TStrings);
50	<	protected
51	<	function GetDataSet: TIBCustomDataSet; virtual; abstract;
52	<	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
53	<	procedure Apply(UpdateKind: TUpdateKind); virtual; abstract;
54	<	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
55	<	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
56	<	public
57	<	constructor Create(AOwner: TComponent); override;
58	<	destructor Destroy; override;
59	<	published
60	<	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
61	<	end;
62	<
63	<	PDateTime = ^TDateTime;
64	<	TBlobDataArray = array[0..0] of TIBBlobStream;
65	<	PBlobDataArray = ^TBlobDataArray;
66	<
67	<	{ TIBCustomDataSet }
68	<	TFieldData = record
69	<	fdDataType: Short;
70	<	fdDataScale: Short;
71	<	fdNullable: Boolean;
72	<	fdIsNull: Boolean;
73	<	fdDataSize: Short;
74	<	fdDataLength: Short;
75	<	fdDataOfs: Integer;
76	<	end;
77	<	PFieldData = ^TFieldData;
78	<
79	<	TCachedUpdateStatus = (
80	<	cusUnmodified, cusModified, cusInserted,
81	<	cusDeleted, cusUninserted
82	<	);
83	<	TIBDBKey = record
84	<	DBKey: array[0..7] of Byte;
85	<	end;
86	<	PIBDBKey = ^TIBDBKey;
87	<
88	<	TRecordData = record
89	<	rdBookmarkFlag: TBookmarkFlag;
90	<	rdFieldCount: Short;
91	<	rdRecordNumber: Long;
92	<	rdCachedUpdateStatus: TCachedUpdateStatus;
93	<	rdUpdateStatus: TUpdateStatus;
94	<	rdSavedOffset: DWORD;
95	<	rdDBKey: TIBDBKey;
96	<	rdFields: array[1..1] of TFieldData;
97	<	end;
98	<	PRecordData = ^TRecordData;
99	<
100	<	{ TIBStringField allows us to have strings longer than 8196 }
101	<
102	<	TIBStringField = class(TStringField)
103	<	public
104	<	constructor create(AOwner: TComponent); override;
105	<	class procedure CheckTypeSize(Value: Integer); override;
106	<	function GetAsString: string; override;
107	<	function GetAsVariant: Variant; override;
108	<	function GetValue(var Value: string): Boolean;
109	<	procedure SetAsString(const Value: string); override;
110	<	end;
111	<
112	<	{ TIBBCDField }
113	<	{  Actually, there is no BCD involved in this type,
114	<	instead it deals with currency types.
115	<	In IB, this is an encapsulation of Numeric (x, y)
116	<	where x < 18 and y <= 4.
117	<	Note: y > 4 will default to Floats
118	<	}
119	<	TIBBCDField = class(TBCDField)
120	<	protected
121	<	class procedure CheckTypeSize(Value: Integer); override;
122	<	function GetAsCurrency: Currency; override;
123	<	function GetAsString: string; override;
124	<	function GetAsVariant: Variant; override;
125	<	function GetDataSize: Integer; override;
126	<	public
127	<	constructor Create(AOwner: TComponent); override;
128	<	published
129	<	property Size default 8;
130	<	end;
131	<
132	<	TIBDataLink = class(TDetailDataLink)
133	<	private
134	<	FDataSet: TIBCustomDataSet;
135	<	protected
136	<	procedure ActiveChanged; override;
137	<	procedure RecordChanged(Field: TField); override;
138	<	function GetDetailDataSet: TDataSet; override;
139	<	procedure CheckBrowseMode; override;
140	<	public
141	<	constructor Create(ADataSet: TIBCustomDataSet);
142	<	destructor Destroy; override;
143	<	end;
144	<
145	<	{ TIBCustomDataSet }
146	<	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
147	<
148	<	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
149	<	UpdateKind: TUpdateKind; var UpdateAction: TIBUpdateAction)
150	<	of object;
151	<	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
152	<	var UpdateAction: TIBUpdateAction) of object;
153	<
154	<	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
155	<
156	<	TIBCustomDataSet = class(TDataset)
157	<	private
158	<	FNeedsRefresh: Boolean;
159	<	FForcedRefresh: Boolean;
160	<	FDidActivate: Boolean;
161	<	FIBLoaded: Boolean;
162	<	FBase: TIBBase;
163	<	FBlobCacheOffset: Integer;
164	<	FBlobStreamList: TList;
165	<	FBufferChunks: Integer;
166	<	FBufferCache,
167	<	FOldBufferCache: PChar;
168	<	FBufferChunkSize,
169	<	FCacheSize,
170	<	FOldCacheSize: Integer;
171	<	FFilterBuffer: PChar;
172	<	FBPos,
173	<	FOBPos,
174	<	FBEnd,
175	<	FOBEnd: DWord;
176	<	FCachedUpdates: Boolean;
177	<	FCalcFieldsOffset: Integer;
178	<	FCurrentRecord: Long;
179	<	FDeletedRecords: Long;
180	<	FModelBuffer,
181	<	FOldBuffer: PChar;
182	<	FOpen: Boolean;
183	<	FInternalPrepared: Boolean;
184	<	FQDelete,
185	<	FQInsert,
186	<	FQRefresh,
187	<	FQSelect,
188	<	FQModify: TIBSQL;
189	<	FRecordBufferSize: Integer;
190	<	FRecordCount: Integer;
191	<	FRecordSize: Integer;
192	<	FUniDirectional: Boolean;
193	<	FUpdateMode: TUpdateMode;
194	<	FUpdateObject: TIBDataSetUpdateObject;
195	<	FParamCheck: Boolean;
196	<	FUpdatesPending: Boolean;
197	<	FUpdateRecordTypes: TIBUpdateRecordTypes;
198	<	FMappedFieldPosition: array of Integer;
199	<	FDataLink: TIBDataLink;
200	<
201	<	FBeforeDatabaseDisconnect,
202	<	FAfterDatabaseDisconnect,
203	<	FDatabaseFree: TNotifyEvent;
204	<	FOnUpdateError: TIBUpdateErrorEvent;
205	<	FOnUpdateRecord: TIBUpdateRecordEvent;
206	<	FBeforeTransactionEnd,
207	<	FAfterTransactionEnd,
208	<	FTransactionFree: TNotifyEvent;
209	<
210	<	function GetSelectStmtHandle: TISC_STMT_HANDLE;
211	<	procedure SetUpdateMode(const Value: TUpdateMode);
212	<	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
213	<
214	<	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
215	<	procedure AdjustRecordOnInsert(Buffer: Pointer);
216	<	function CanEdit: Boolean;
217	<	function CanInsert: Boolean;
218	<	function CanDelete: Boolean;
219	<	function CanRefresh: Boolean;
220	<	procedure CheckEditState;
221	<	procedure ClearBlobCache;
222	<	procedure CopyRecordBuffer(Source, Dest: Pointer);
223	<	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
224	<	procedure DoAfterDatabaseDisconnect(Sender: TObject);
225	<	procedure DoDatabaseFree(Sender: TObject);
226	<	procedure DoBeforeTransactionEnd(Sender: TObject);
227	<	procedure DoAfterTransactionEnd(Sender: TObject);
228	<	procedure DoTransactionFree(Sender: TObject);
229	<	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
230	<	Buffer: PChar);
231	<	function GetDatabase: TIBDatabase;
232	<	function GetDBHandle: PISC_DB_HANDLE;
233	<	function GetDeleteSQL: TStrings;
234	<	function GetInsertSQL: TStrings;
235	<	function GetSQLParams: TIBXSQLDA;
236	<	function GetRefreshSQL: TStrings;
237	<	function GetSelectSQL: TStrings;
238	<	function GetStatementType: TIBSQLTypes;
239	<	function GetModifySQL: TStrings;
240	<	function GetTransaction: TIBTransaction;
241	<	function GetTRHandle: PISC_TR_HANDLE;
242	<	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
243	<	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
244	<	Options: TLocateOptions): Boolean; virtual;
245	<	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
246	<	procedure InternalRevertRecord(RecordNumber: Integer);
247	<	function IsVisible(Buffer: PChar): Boolean;
248	<	procedure SaveOldBuffer(Buffer: PChar);
249	<	procedure SetBufferChunks(Value: Integer);
250	<	procedure SetDatabase(Value: TIBDatabase);
251	<	procedure SetDeleteSQL(Value: TStrings);
252	<	procedure SetInsertSQL(Value: TStrings);
253	<	procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
254	<	procedure SetRefreshSQL(Value: TStrings);
255	<	procedure SetSelectSQL(Value: TStrings);
256	<	procedure SetModifySQL(Value: TStrings);
257	<	procedure SetTransaction(Value: TIBTransaction);
258	<	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
259	<	procedure SetUniDirectional(Value: Boolean);
260	<	procedure RefreshParams;
261	<	procedure SQLChanging(Sender: TObject); virtual;
262	<	function AdjustPosition(FCache: PChar; Offset: DWORD;
263	<	Origin: Integer): Integer;
264	<	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
265	<	Buffer: PChar);
266	<	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
267	<	ReadOldBuffer: Boolean);
268	<	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
269	<	Buffer: PChar);
270	<	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
271	<	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
272	<	DoCheck: Boolean): TGetResult;
273	<
274	<	protected
275	<	procedure ActivateConnection;
276	<	function ActivateTransaction: Boolean;
277	<	procedure DeactivateTransaction;
278	<	procedure CheckDatasetClosed;
279	<	procedure CheckDatasetOpen;
280	<	function GetActiveBuf: PChar;
281	<	procedure InternalBatchInput(InputObject: TIBBatchInput);
282	<	procedure InternalBatchOutput(OutputObject: TIBBatchOutput);
283	<	procedure InternalPrepare; virtual;
284	<	procedure InternalUnPrepare; virtual;
285	<	procedure InternalExecQuery; virtual;
286	<	procedure InternalRefreshRow; virtual;
287	<	procedure InternalSetParamsFromCursor;
288	<	procedure CheckNotUniDirectional;
289	<
290	<	{ IProviderSupport }
291	<	procedure PSEndTransaction(Commit: Boolean); override;
292	<	function PSExecuteStatement(const ASQL: string; AParams: TParams;
293	<	ResultSet: Pointer = nil): Integer; override;
294	<	function PsGetTableName: string; override;
295	<	function PSGetQuoteChar: string; override;
296	<	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
297	<	function PSInTransaction: Boolean; override;
298	<	function PSIsSQLBased: Boolean; override;
299	<	function PSIsSQLSupported: Boolean; override;
300	<	procedure PSStartTransaction; override;
301	<	procedure PSReset; override;
302	<	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
303	<
304	<	{ TDataSet support }
305	<	procedure InternalInsert; override;
306	<	procedure InitRecord(Buffer: PChar); override;
307	<	procedure Disconnect; virtual;
308	<	function ConstraintsStored: Boolean;
309	<	procedure ClearCalcFields(Buffer: PChar); override;
310	<	function AllocRecordBuffer: PChar; override;
311	<	procedure DoBeforeDelete; override;
312	<	procedure DoBeforeEdit; override;
313	<	procedure DoBeforeInsert; override;
314	<	procedure FreeRecordBuffer(var Buffer: PChar); override;
315	<	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
316	<	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
317	<	function GetCanModify: Boolean; override;
318	<	function GetDataSource: TDataSource; override;
319	<	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
320	<	function GetRecNo: Integer; override;
321	<	function GetRecord(Buffer: PChar; GetMode: TGetMode;
322	<	DoCheck: Boolean): TGetResult; override;
323	<	function GetRecordCount: Integer; override;
324	<	function GetRecordSize: Word; override;
325	<	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
326	<	procedure InternalCancel; override;
327	<	procedure InternalClose; override;
328	<	procedure InternalDelete; override;
329	<	procedure InternalFirst; override;
330	<	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
331	<	procedure InternalGotoBookmark(Bookmark: Pointer); override;
332	<	procedure InternalHandleException; override;
333	<	procedure InternalInitFieldDefs; override;
334	<	procedure InternalInitRecord(Buffer: PChar); override;
335	<	procedure InternalLast; override;
336	<	procedure InternalOpen; override;
337	<	procedure InternalPost; override;
338	<	procedure InternalRefresh; override;
339	<	procedure InternalSetFieldData(Field: TField; Buffer: Pointer);
340	<	procedure InternalSetToRecord(Buffer: PChar); override;
341	<	function IsCursorOpen: Boolean; override;
342	<	procedure ReQuery;
343	<	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
344	<	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
345	<	procedure SetCachedUpdates(Value: Boolean);
346	<	procedure SetDataSource(Value: TDataSource);
347	<	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
348	<	procedure SetFieldData(Field : TField; Buffer : Pointer;
349	<	NativeFormat : Boolean); overload; override;
350	<	procedure SetRecNo(Value: Integer); override;
351	<
352	<	protected
353	<	{Likely to be made public by descendant classes}
354	<	property SQLParams: TIBXSQLDA read GetSQLParams;
355	<	property Params: TIBXSQLDA read GetSQLParams;
356	<	property InternalPrepared: Boolean read FInternalPrepared;
357	<	property QDelete: TIBSQL read FQDelete;
358	<	property QInsert: TIBSQL read FQInsert;
359	<	property QRefresh: TIBSQL read FQRefresh;
360	<	property QSelect: TIBSQL read FQSelect;
361	<	property QModify: TIBSQL read FQModify;
362	<	property StatementType: TIBSQLTypes read GetStatementType;
363	<	property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle;
364	<
365	<	{Likely to be made published by descendant classes}
366	<	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
367	<	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
368	<	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
369	<	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
370	<	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
371	<	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
372	<	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
373	<	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
374	<	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
375	<	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
376	<
377	<	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
378	<	write FBeforeDatabaseDisconnect;
379	<	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
380	<	write FAfterDatabaseDisconnect;
381	<	property DatabaseFree: TNotifyEvent read FDatabaseFree
382	<	write FDatabaseFree;
383	<	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
384	<	write FBeforeTransactionEnd;
385	<	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
386	<	write FAfterTransactionEnd;
387	<	property TransactionFree: TNotifyEvent read FTransactionFree
388	<	write FTransactionFree;
389	<
390	<	public
391	<	constructor Create(AOwner: TComponent); override;
392	<	destructor Destroy; override;
393	<	procedure ApplyUpdates;
394	<	function CachedUpdateStatus: TCachedUpdateStatus;
395	<	procedure CancelUpdates;
396	<	procedure FetchAll;
397	<	function LocateNext(const KeyFields: string; const KeyValues: Variant;
398	<	Options: TLocateOptions): Boolean;
399	<	procedure RecordModified(Value: Boolean);
400	<	procedure RevertRecord;
401	<	procedure Undelete;
402	<
403	<	{ TDataSet support methods }
404	<	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
405	<	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
406	<	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
407	<	function GetCurrentRecord(Buffer: PChar): Boolean; override;
408	<	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
409	<	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; override;
410	<	function GetFieldData(Field : TField; Buffer : Pointer;
411	<	NativeFormat : Boolean) : Boolean; overload; override;
412	<	function Locate(const KeyFields: string; const KeyValues: Variant;
413	<	Options: TLocateOptions): Boolean; override;
414	<	function Lookup(const KeyFields: string; const KeyValues: Variant;
415	<	const ResultFields: string): Variant; override;
416	<	function UpdateStatus: TUpdateStatus; override;
417	<	function IsSequenced: Boolean; override;
418	<
419	<	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
420	<	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
421	<	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
422	<	property UpdatesPending: Boolean read FUpdatesPending;
423	<	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
424	<	write SetUpdateRecordTypes;
425	<
426	<	published
427	<	property Database: TIBDatabase read GetDatabase write SetDatabase;
428	<	property Transaction: TIBTransaction read GetTransaction
429	<	write SetTransaction;
430	<	property ForcedRefresh: Boolean read FForcedRefresh
431	<	write FForcedRefresh default False;
432	<	property AutoCalcFields;
433	<	property ObjectView default False;
434	<
435	<	property AfterCancel;
436	<	property AfterClose;
437	<	property AfterDelete;
438	<	property AfterEdit;
439	<	property AfterInsert;
440	<	property AfterOpen;
441	<	property AfterPost;
442	<	property AfterRefresh;
443	<	property AfterScroll;
444	<	property BeforeCancel;
445	<	property BeforeClose;
446	<	property BeforeDelete;
447	<	property BeforeEdit;
448	<	property BeforeInsert;
449	<	property BeforeOpen;
450	<	property BeforePost;
451	<	property BeforeRefresh;
452	<	property BeforeScroll;
453	<	property OnCalcFields;
454	<	property OnDeleteError;
455	<	property OnEditError;
456	<	property OnNewRecord;
457	<	property OnPostError;
458	<	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
459	<	write FOnUpdateError;
460	<	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
461	<	write FOnUpdateRecord;
462	<	end;
463	<
464	<	TIBDataSet = class(TIBCustomDataSet)
465	<	private
466	<	function GetPrepared: Boolean;
467	<
468	<	protected
469	<	procedure SetFiltered(Value: Boolean); override;
470	<	procedure InternalOpen; override;
471	<
472	<	public
473	<	procedure Prepare;
474	<	procedure UnPrepare;
475	<	procedure BatchInput(InputObject: TIBBatchInput);
476	<	procedure BatchOutput(OutputObject: TIBBatchOutput);
477	<	procedure ExecSQL;
478	<
479	<	public
480	<	property Params;
481	<	property Prepared : Boolean read GetPrepared;
482	<	property QDelete;
483	<	property QInsert;
484	<	property QRefresh;
485	<	property QSelect;
486	<	property QModify;
487	<	property StatementType;
488	<	property SelectStmtHandle;
489	<
490	<	published
491	<	{ TIBCustomDataSet }
492	<	property BufferChunks;
493	<	property CachedUpdates;
494	<	property DeleteSQL;
495	<	property InsertSQL;
496	<	property RefreshSQL;
497	<	property SelectSQL;
498	<	property ModifySQL;
499	<	property ParamCheck;
500	<	property UniDirectional;
501	<	property Filtered;
502	<
503	<	property BeforeDatabaseDisconnect;
504	<	property AfterDatabaseDisconnect;
505	<	property DatabaseFree;
506	<	property BeforeTransactionEnd;
507	<	property AfterTransactionEnd;
508	<	property TransactionFree;
509	<
510	<	{ TIBDataSet }
511	<	property Active;
512	<	property AutoCalcFields;
513	<	property DataSource read GetDataSource write SetDataSource;
514	<
515	<	property AfterCancel;
516	<	property AfterClose;
517	<	property AfterDelete;
518	<	property AfterEdit;
519	<	property AfterInsert;
520	<	property AfterOpen;
521	<	property AfterPost;
522	<	property AfterScroll;
523	<	property BeforeCancel;
524	<	property BeforeClose;
525	<	property BeforeDelete;
526	<	property BeforeEdit;
527	<	property BeforeInsert;
528	<	property BeforeOpen;
529	<	property BeforePost;
530	<	property BeforeScroll;
531	<	property OnCalcFields;
532	<	property OnDeleteError;
533	<	property OnEditError;
534	<	property OnFilterRecord;
535	<	property OnNewRecord;
536	<	property OnPostError;
537	<	end;
538	<
539	<	{ TIBDSBlobStream }
540	<	TIBDSBlobStream = class(TStream)
541	<	protected
542	<	FField: TField;
543	<	FBlobStream: TIBBlobStream;
544	<	public
545	<	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
546	<	Mode: TBlobStreamMode);
547	<	function Read(var Buffer; Count: Longint): Longint; override;
548	<	function Seek(Offset: Longint; Origin: Word): Longint; override;
549	<	procedure SetSize(NewSize: Longint); override;
550	<	function Write(const Buffer; Count: Longint): Longint; override;
551	<	end;
552	<
553	<	const
554	<	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
555	<	nil,                { ftUnknown }
556	<	TIBStringField,     { ftString }
557	<	TSmallintField,     { ftSmallint }
558	<	TIntegerField,      { ftInteger }
559	<	TWordField,         { ftWord }
560	<	TBooleanField,      { ftBoolean }
561	<	TFloatField,        { ftFloat }
562	<	TCurrencyField,     { ftCurrency }
563	<	TIBBCDField,        { ftBCD }
564	<	TDateField,         { ftDate }
565	<	TTimeField,         { ftTime }
566	<	TDateTimeField,     { ftDateTime }
567	<	TBytesField,        { ftBytes }
568	<	TVarBytesField,     { ftVarBytes }
569	<	TAutoIncField,      { ftAutoInc }
570	<	TBlobField,         { ftBlob }
571	<	TMemoField,         { ftMemo }
572	<	TGraphicField,      { ftGraphic }
573	<	TBlobField,         { ftFmtMemo }
574	<	TBlobField,         { ftParadoxOle }
575	<	TBlobField,         { ftDBaseOle }
576	<	TBlobField,         { ftTypedBinary }
577	<	nil,                { ftCursor }
578	<	TStringField,       { ftFixedChar }
579	<	nil, {TWideStringField } { ftWideString }
580	<	TLargeIntField,     { ftLargeInt }
581	<	TADTField,          { ftADT }
582	<	TArrayField,        { ftArray }
583	<	TReferenceField,    { ftReference }
584	<	TDataSetField,     { ftDataSet }
585	<	TBlobField,         { ftOraBlob }
586	<	TMemoField,         { ftOraClob }
587	<	TVariantField,      { ftVariant }
588	<	TInterfaceField,    { ftInterface }
589	<	TIDispatchField,     { ftIDispatch }
590	<	TGuidField);        { ftGuid }
591	<	var
592	<	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;
593	<
594	<	implementation
595	<
596	<	uses IBIntf, IBQuery;
597	<
598	<	type
599	<
600	<	TFieldNode = class(TObject)
601	<	protected
602	<	FieldName : String;
603	<	COMPUTED_BLR : Boolean;
604	<	DEFAULT_VALUE : boolean;
605	<	NextField : TFieldNode;
606	<	end;
607	<
608	<	TRelationNode = class(TObject)
609	<	protected
610	<	RelationName : String;
611	<	FieldNodes : TFieldNode;
612	<	NextRelation : TRelationNode;
613	<	end;
614	<
615	<
616	<	{ TIBStringField}
617	<
618	<	constructor TIBStringField.Create(AOwner: TComponent);
619	<	begin
620	<	inherited;
621	<	end;
622	<
623	<	class procedure TIBStringField.CheckTypeSize(Value: Integer);
624	<	begin
625	<	{ don't check string size. all sizes valid }
626	<	end;
627	<
628	<	function TIBStringField.GetAsString: string;
629	<	begin
630	<	if not GetValue(Result) then Result := '';
631	<	end;
632	<
633	<	function TIBStringField.GetAsVariant: Variant;
634	<	var
635	<	S: string;
636	<	begin
637	<	if GetValue(S) then Result := S else Result := Null;
638	<	end;
639	<
640	<	function TIBStringField.GetValue(var Value: string): Boolean;
641	<	var
642	<	Buffer: PChar;
643	<	begin
644	<	Buffer := nil;
645	<	IBAlloc(Buffer, 0, Size + 1);
646	<	try
647	<	Result := GetData(Buffer);
648	<	if Result then
649	<	begin
650	<	Value := string(Buffer);
651	<	if Transliterate and (Value <> '') then
652	<	DataSet.Translate(PChar(Value), PChar(Value), False);
653	<	end
654	<	finally
655	<	FreeMem(Buffer);
656	<	end;
657	<	end;
658	<
659	<	procedure TIBStringField.SetAsString(const Value: string);
660	<	var
661	<	Buffer: PChar;
662	<	begin
663	<	Buffer := nil;
664	<	IBAlloc(Buffer, 0, Size + 1);
665	<	try
666	<	StrLCopy(Buffer, PChar(Value), Size);
667	<	if Transliterate then
668	<	DataSet.Translate(Buffer, Buffer, True);
669	<	SetData(Buffer);
670	<	finally
671	<	FreeMem(Buffer);
672	<	end;
673	<	end;
674	<
675	<	{ TIBBCDField }
676	<
677	<	constructor TIBBCDField.Create(AOwner: TComponent);
678	<	begin
679	<	inherited Create(AOwner);
680	<	SetDataType(ftBCD);
681	<	Size := 8;
682	<	end;
683	<
684	<	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
685	<	begin
686	<	{ No need to check as the base type is currency, not BCD }
687	<	end;
688	<
689	<	function TIBBCDField.GetAsCurrency: Currency;
690	<	begin
691	<	if not GetValue(Result) then
692	<	Result := 0;
693	<	end;
694	<
695	<	function TIBBCDField.GetAsString: string;
696	<	var
697	<	C: System.Currency;
698	<	begin
699	<	if GetValue(C) then
700	<	Result := CurrToStr(C)
701	<	else
702	<	Result := '';
703	<	end;
704	<
705	<	function TIBBCDField.GetAsVariant: Variant;
706	<	var
707	<	C: System.Currency;
708	<	begin
709	<	if GetValue(C) then
710	<	Result := C
711	<	else
712	<	Result := Null;
713	<	end;
714	<
715	<	function TIBBCDField.GetDataSize: Integer;
716	<	begin
717	<	Result := 8;
718	<	end;
719	<
720	<	{ TIBDataLink }
721	<
722	<	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
723	<	begin
724	<	inherited Create;
725	<	FDataSet := ADataSet;
726	<	end;
727	<
728	<	destructor TIBDataLink.Destroy;
729	<	begin
730	<	FDataSet.FDataLink := nil;
731	<	inherited;
732	<	end;
733	<
734	<
735	<	procedure TIBDataLink.ActiveChanged;
736	<	begin
737	<	if FDataSet.Active then
738	<	FDataSet.RefreshParams;
739	<	end;
740	<
741	<
742	<	function TIBDataLink.GetDetailDataSet: TDataSet;
743	<	begin
744	<	Result := FDataSet;
745	<	end;
746	<
747	<	procedure TIBDataLink.RecordChanged(Field: TField);
748	<	begin
749	<	if (Field = nil) and FDataSet.Active then
750	<	FDataSet.RefreshParams;
751	<	end;
752	<
753	<	procedure TIBDataLink.CheckBrowseMode;
754	<	begin
755	<	if FDataSet.Active then
756	<	FDataSet.CheckBrowseMode;
757	<	end;
758	<
759	<	{ TIBCustomDataSet }
760	<
761	<	constructor TIBCustomDataSet.Create(AOwner: TComponent);
762	<	begin
763	<	inherited;
764	<	FIBLoaded := False;
765	<	CheckIBLoaded;
766	<	FIBLoaded := True;
767	<	FBase := TIBBase.Create(Self);
768	<	FCurrentRecord := -1;
769	<	FDeletedRecords := 0;
770	<	FUniDirectional := False;
771	<	FBufferChunks := BufferCacheSize;
772	<	FBlobStreamList := TList.Create;
773	<	FDataLink := TIBDataLink.Create(Self);
774	<	FQDelete := TIBSQL.Create(Self);
775	<	FQDelete.OnSQLChanging := SQLChanging;
776	<	FQDelete.GoToFirstRecordOnExecute := False;
777	<	FQInsert := TIBSQL.Create(Self);
778	<	FQInsert.OnSQLChanging := SQLChanging;
779	<	FQInsert.GoToFirstRecordOnExecute := False;
780	<	FQRefresh := TIBSQL.Create(Self);
781	<	FQRefresh.OnSQLChanging := SQLChanging;
782	<	FQRefresh.GoToFirstRecordOnExecute := False;
783	<	FQSelect := TIBSQL.Create(Self);
784	<	FQSelect.OnSQLChanging := SQLChanging;
785	<	FQSelect.GoToFirstRecordOnExecute := False;
786	<	FQModify := TIBSQL.Create(Self);
787	<	FQModify.OnSQLChanging := SQLChanging;
788	<	FQModify.GoToFirstRecordOnExecute := False;
789	<	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
790	<	FParamCheck := True;
791	<	FForcedRefresh := False;
792	<	{Bookmark Size is Integer for IBX}
793	<	BookmarkSize := SizeOf(Integer);
794	<	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
795	<	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
796	<	FBase.OnDatabaseFree := DoDatabaseFree;
797	<	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
798	<	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
799	<	FBase.OnTransactionFree := DoTransactionFree;
800	<	if AOwner is TIBDatabase then
801	<	Database := TIBDatabase(AOwner)
802	<	else
803	<	if AOwner is TIBTransaction then
804	<	Transaction := TIBTransaction(AOwner);
805	<	end;
806	<
807	<	destructor TIBCustomDataSet.Destroy;
808	<	begin
809	<	inherited;
810	<	if FIBLoaded then
811	<	begin
812	<	FDataLink.Free;
813	<	FBase.Free;
814	<	ClearBlobCache;
815	<	FBlobStreamList.Free;
816	<	FreeMem(FBufferCache);
817	<	FBufferCache := nil;
818	<	FreeMem(FOldBufferCache);
819	<	FOldBufferCache := nil;
820	<	FCacheSize := 0;
821	<	FOldCacheSize := 0;
822	<	FMappedFieldPosition := nil;
823	<	end;
824	<	end;
825	<
826	<	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
827	<	TGetResult;
828	<	begin
829	<	while not IsVisible(Buffer) do
830	<	begin
831	<	if GetMode = gmPrior then
832	<	begin
833	<	Dec(FCurrentRecord);
834	<	if FCurrentRecord = -1 then
835	<	begin
836	<	result := grBOF;
837	<	exit;
838	<	end;
839	<	ReadRecordCache(FCurrentRecord, Buffer, False);
840	<	end
841	<	else begin
842	<	Inc(FCurrentRecord);
843	<	if (FCurrentRecord = FRecordCount) then
844	<	begin
845	<	if (not FQSelect.EOF) and (FQSelect.Next <> nil) then
846	<	begin
847	<	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
848	<	Inc(FRecordCount);
849	<	end
850	<	else begin
851	<	result := grEOF;
852	<	exit;
853	<	end;
854	<	end
855	<	else
856	<	ReadRecordCache(FCurrentRecord, Buffer, False);
857	<	end;
858	<	end;
859	<	result := grOK;
860	<	end;
861	<
862	<	procedure TIBCustomDataSet.ApplyUpdates;
863	<	var
864	<	CurBookmark: string;
865	<	Buffer: PRecordData;
866	<	CurUpdateTypes: TIBUpdateRecordTypes;
867	<	UpdateAction: TIBUpdateAction;
868	<	UpdateKind: TUpdateKind;
869	<	bRecordsSkipped: Boolean;
870	<
871	<	procedure GetUpdateKind;
872	<	begin
873	<	case Buffer^.rdCachedUpdateStatus of
874	<	cusModified:
875	<	UpdateKind := ukModify;
876	<	cusInserted:
877	<	UpdateKind := ukInsert;
878	<	else
879	<	UpdateKind := ukDelete;
880	<	end;
881	<	end;
882	<
883	<	procedure ResetBufferUpdateStatus;
884	<	begin
885	<	case Buffer^.rdCachedUpdateStatus of
886	<	cusModified:
887	<	begin
888	<	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
889	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
890	<	end;
891	<	cusInserted:
892	<	begin
893	<	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
894	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
895	<	end;
896	<	cusDeleted:
897	<	begin
898	<	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
899	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
900	<	end;
901	<	end;
902	<	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
903	<	end;
904	<
905	<	procedure UpdateUsingOnUpdateRecord;
906	<	begin
907	<	UpdateAction := uaFail;
908	<	try
909	<	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
910	<	except
911	<	on E: Exception do
912	<	begin
913	<	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
914	<	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
915	<	if UpdateAction = uaFail then
916	<	raise;
917	<	end;
918	<	end;
919	<	end;
920	<
921	<	procedure UpdateUsingUpdateObject;
922	<	begin
923	<	try
924	<	FUpdateObject.Apply(UpdateKind);
925	<	ResetBufferUpdateStatus;
926	<	except
927	<	on E: Exception do
928	<	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
929	<	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
930	<	end;
931	<	end;
932	<
933	<	procedure UpdateUsingInternalquery;
934	<	begin
935	<	try
936	<	case Buffer^.rdCachedUpdateStatus of
937	<	cusModified:
938	<	InternalPostRecord(FQModify, Buffer);
939	<	cusInserted:
940	<	InternalPostRecord(FQInsert, Buffer);
941	<	cusDeleted:
942	<	InternalDeleteRecord(FQDelete, Buffer);
943	<	end;
944	<	except
945	<	on E: EIBError do begin
946	<	UpdateAction := uaFail;
947	<	if Assigned(FOnUpdateError) then
948	<	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
949	<	case UpdateAction of
950	<	uaFail: raise;
951	<	uaAbort: SysUtils.Abort;
952	<	uaSkip: bRecordsSkipped := True;
953	<	end;
954	<	end;
955	<	end;
956	<	end;
957	<
958	<	begin
959	<	if State in [dsEdit, dsInsert] then
960	<	Post;
961	<	FBase.CheckDatabase;
962	<	FBase.CheckTransaction;
963	<	DisableControls;
964	<	CurBookmark := Bookmark;
965	<	CurUpdateTypes := FUpdateRecordTypes;
966	<	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
967	<	try
968	<	First;
969	<	bRecordsSkipped := False;
970	<	while not EOF do
971	<	begin
972	<	Buffer := PRecordData(GetActiveBuf);
973	<	GetUpdateKind;
974	<	UpdateAction := uaApply;
975	<	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
976	<	begin
977	<	if (Assigned(FOnUpdateRecord)) then
978	<	UpdateUsingOnUpdateRecord
979	<	else
980	<	if Assigned(FUpdateObject) then
981	<	UpdateUsingUpdateObject;
982	<	case UpdateAction of
983	<	uaFail:
984	<	IBError(ibxeUserAbort, [nil]);
985	<	uaAbort:
986	<	SysUtils.Abort;
987	<	uaApplied:
988	<	ResetBufferUpdateStatus;
989	<	uaSkip:
990	<	bRecordsSkipped := True;
991	<	uaRetry:
992	<	Continue;
993	<	end;
994	<	end;
995	<	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
996	<	begin
997	<	UpdateUsingInternalquery;
998	<	UpdateAction := uaApplied;
999	<	end;
1000	<	Next;
1001	<	end;
1002	<	FUpdatesPending := bRecordsSkipped;
1003	<	finally
1004	<	FUpdateRecordTypes := CurUpdateTypes;
1005	<	Bookmark := CurBookmark;
1006	<	EnableControls;
1007	<	end;
1008	<	end;
1009	<
1010	<	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1011	<	begin
1012	<	FQSelect.BatchInput(InputObject);
1013	<	end;
1014	<
1015	<	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1016	<	var
1017	<	Qry: TIBSQL;
1018	<	begin
1019	<	Qry := TIBSQL.Create(Self);
1020	<	try
1021	<	Qry.Database := FBase.Database;
1022	<	Qry.Transaction := FBase.Transaction;
1023	<	Qry.SQL.Assign(FQSelect.SQL);
1024	<	Qry.BatchOutput(OutputObject);
1025	<	finally
1026	<	Qry.Free;
1027	<	end;
1028	<	end;
1029	<
1030	<	procedure TIBCustomDataSet.CancelUpdates;
1031	<	var
1032	<	CurUpdateTypes: TIBUpdateRecordTypes;
1033	<	begin
1034	<	if State in [dsEdit, dsInsert] then
1035	<	Post;
1036	<	if FCachedUpdates and FUpdatesPending then
1037	<	begin
1038	<	DisableControls;
1039	<	CurUpdateTypes := UpdateRecordTypes;
1040	<	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1041	<	try
1042	<	First;
1043	<	while not EOF do
1044	<	begin
1045	<	if UpdateStatus = usInserted then
1046	<	RevertRecord
1047	<	else
1048	<	begin
1049	<	RevertRecord;
1050	<	Next;
1051	<	end;
1052	<	end;
1053	<	finally
1054	<	UpdateRecordTypes := CurUpdateTypes;
1055	<	First;
1056	<	FUpdatesPending := False;
1057	<	EnableControls;
1058	<	end;
1059	<	end;
1060	<	end;
1061	<
1062	<	procedure TIBCustomDataSet.ActivateConnection;
1063	<	begin
1064	<	if not Assigned(Database) then
1065	<	IBError(ibxeDatabaseNotAssigned, [nil]);
1066	<	if not Assigned(Transaction) then
1067	<	IBError(ibxeTransactionNotAssigned, [nil]);
1068	<	if not Database.Connected then Database.Open;
1069	<	end;
1070	<
1071	<	function TIBCustomDataSet.ActivateTransaction: Boolean;
1072	<	begin
1073	<	Result := False;
1074	<	if not Assigned(Transaction) then
1075	<	IBError(ibxeTransactionNotAssigned, [nil]);
1076	<	if not Transaction.Active then
1077	<	begin
1078	<	Result := True;
1079	<	Transaction.StartTransaction;
1080	<	FDidActivate := True;
1081	<	end;
1082	<	end;
1083	<
1084	<	procedure TIBCustomDataSet.DeactivateTransaction;
1085	<	var
1086	<	i: Integer;
1087	<	begin
1088	<	if not Assigned(Transaction) then
1089	<	IBError(ibxeTransactionNotAssigned, [nil]);
1090	<	with Transaction do
1091	<	begin
1092	<	for i := 0 to SQLObjectCount - 1 do
1093	<	begin
1094	<	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1095	<	begin
1096	<	if TDataSet(SQLObjects[i].owner).Active then
1097	<	begin
1098	<	FDidActivate := False;
1099	<	exit;
1100	<	end;
1101	<	end;
1102	<	end;
1103	<	end;
1104	<	FInternalPrepared := False;
1105	<	if Transaction.InTransaction then
1106	<	Transaction.Commit;
1107	<	FDidActivate := False;
1108	<	end;
1109	<
1110	<	procedure TIBCustomDataSet.CheckDatasetClosed;
1111	<	begin
1112	<	if FOpen then
1113	<	IBError(ibxeDatasetOpen, [nil]);
1114	<	end;
1115	<
1116	<	procedure TIBCustomDataSet.CheckDatasetOpen;
1117	<	begin
1118	<	if not FOpen then
1119	<	IBError(ibxeDatasetClosed, [nil]);
1120	<	end;
1121	<
1122	<	procedure TIBCustomDataSet.CheckNotUniDirectional;
1123	<	begin
1124	<	if UniDirectional then
1125	<	IBError(ibxeDataSetUniDirectional, [nil]);
1126	<	end;
1127	<
1128	<	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1129	<	begin
1130	<	with PRecordData(Buffer)^ do
1131	<	if (State = dsInsert) and (not Modified) then
1132	<	begin
1133	<	rdRecordNumber := FRecordCount;
1134	<	FCurrentRecord := FRecordCount;
1135	<	end;
1136	<	end;
1137	<
1138	<	function TIBCustomDataSet.CanEdit: Boolean;
1139	<	var
1140	<	Buff: PRecordData;
1141	<	begin
1142	<	Buff := PRecordData(GetActiveBuf);
1143	<	result := (FQModify.SQL.Text <> '') or
1144	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1145	<	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1146	<	(FCachedUpdates));
1147	<	end;
1148	<
1149	<	function TIBCustomDataSet.CanInsert: Boolean;
1150	<	begin
1151	<	result := (FQInsert.SQL.Text <> '') or
1152	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1153	<	end;
1154	<
1155	<	function TIBCustomDataSet.CanDelete: Boolean;
1156	<	begin
1157	<	if (FQDelete.SQL.Text <> '') or
1158	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1159	<	result := True
1160	<	else
1161	<	result := False;
1162	<	end;
1163	<
1164	<	function TIBCustomDataSet.CanRefresh: Boolean;
1165	<	begin
1166	<	result := (FQRefresh.SQL.Text <> '') or
1167	<	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1168	<	end;
1169	<
1170	<	procedure TIBCustomDataSet.CheckEditState;
1171	<	begin
1172	<	case State of
1173	<	{ Check all the wsEditMode types }
1174	<	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1175	<	dsNewValue, dsInternalCalc :
1176	<	begin
1177	<	if (State in [dsEdit]) and (not CanEdit) then
1178	<	IBError(ibxeCannotUpdate, [nil]);
1179	<	if (State in [dsInsert]) and (not CanInsert) then
1180	<	IBError(ibxeCannotInsert, [nil]);
1181	<	end;
1182	<	else
1183	<	IBError(ibxeNotEditing, [])
1184	<	end;
1185	<	end;
1186	<
1187	<	procedure TIBCustomDataSet.ClearBlobCache;
1188	<	var
1189	<	i: Integer;
1190	<	begin
1191	<	for i := 0 to FBlobStreamList.Count - 1 do
1192	<	begin
1193	<	TIBBlobStream(FBlobStreamList[i]).Free;
1194	<	FBlobStreamList[i] := nil;
1195	<	end;
1196	<	FBlobStreamList.Pack;
1197	<	end;
1198	<
1199	<	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1200	<	begin
1201	<	Move(Source^, Dest^, FRecordBufferSize);
1202	<	end;
1203	<
1204	<	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1205	<	begin
1206	<	if Active then
1207	<	Active := False;
1208	<	FInternalPrepared := False;
1209	<	if Assigned(FBeforeDatabaseDisconnect) then
1210	<	FBeforeDatabaseDisconnect(Sender);
1211	<	end;
1212	<
1213	<	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1214	<	begin
1215	<	if Assigned(FAfterDatabaseDisconnect) then
1216	<	FAfterDatabaseDisconnect(Sender);
1217	<	end;
1218	<
1219	<	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1220	<	begin
1221	<	if Assigned(FDatabaseFree) then
1222	<	FDatabaseFree(Sender);
1223	<	end;
1224	<
1225	<	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject);
1226	<	begin
1227	<	if Active then
1228	<	Active := False;
1229	<	if FQSelect <> nil then
1230	<	FQSelect.FreeHandle;
1231	<	if FQDelete <> nil then
1232	<	FQDelete.FreeHandle;
1233	<	if FQInsert <> nil then
1234	<	FQInsert.FreeHandle;
1235	<	if FQModify <> nil then
1236	<	FQModify.FreeHandle;
1237	<	if FQRefresh <> nil then
1238	<	FQRefresh.FreeHandle;
1239	<	if Assigned(FBeforeTransactionEnd) then
1240	<	FBeforeTransactionEnd(Sender);
1241	<	end;
1242	<
1243	<	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1244	<	begin
1245	<	if Assigned(FAfterTransactionEnd) then
1246	<	FAfterTransactionEnd(Sender);
1247	<	end;
1248	<
1249	<	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1250	<	begin
1251	<	if Assigned(FTransactionFree) then
1252	<	FTransactionFree(Sender);
1253	<	end;
1254	<
1255	<	{ Read the record from FQSelect.Current into the record buffer
1256	<	Then write the buffer to in memory cache }
1257	<	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
1258	<	RecordNumber: Integer; Buffer: PChar);
1259	<	var
1260	<	p: PRecordData;
1261	<	pbd: PBlobDataArray;
1262	<	i, j: Integer;
1263	<	LocalData: Pointer;
1264	<	LocalDate, LocalDouble: Double;
1265	<	LocalInt: Integer;
1266	<	LocalInt64: Int64;
1267	<	LocalCurrency: Currency;
1268	<	FieldsLoaded: Integer;
1269	<	begin
1270	<	p := PRecordData(Buffer);
1271	<	{ Make sure blob cache is empty }
1272	<	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
1273	<	if RecordNumber > -1 then
1274	<	for i := 0 to BlobFieldCount - 1 do
1275	<	pbd^[i] := nil;
1276	<	{ Get record information }
1277	<	p^.rdBookmarkFlag := bfCurrent;
1278	<	p^.rdFieldCount := Qry.Current.Count;
1279	<	p^.rdRecordNumber := RecordNumber;
1280	<	p^.rdUpdateStatus := usUnmodified;
1281	<	p^.rdCachedUpdateStatus := cusUnmodified;
1282	<	p^.rdSavedOffset := $FFFFFFFF;
1283	<
1284	<	{ Load up the fields }
1285	<	FieldsLoaded := FQSelect.Current.Count;
1286	<	j := 1;
1287	<	for i := 0 to Qry.Current.Count - 1 do
1288	<	begin
1289	<	if (Qry = FQSelect) then
1290	<	j := i + 1
1291	<	else begin
1292	<	if FieldsLoaded = 0 then
1293	<	break;
1294	<	j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1;
1295	<	if j < 1 then
1296	<	continue
1297	<	else
1298	<	Dec(FieldsLoaded);
1299	<	end;
1300	<	with FQSelect.Current[j - 1].Data^ do
1301	<	if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
1302	<	begin
1303	<	if sqllen <= 8 then
1304	<	p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^;
1305	<	continue;
1306	<	end;
1307	<	if j > 0 then with p^ do
1308	<	begin
1309	<	rdFields[j].fdDataType :=
1310	<	Qry.Current[i].Data^.sqltype and (not 1);
1311	<	rdFields[j].fdDataScale :=
1312	<	Qry.Current[i].Data^.sqlscale;
1313	<	rdFields[j].fdNullable :=
1314	<	(Qry.Current[i].Data^.sqltype and 1 = 1);
1315	<	rdFields[j].fdIsNull :=
1316	<	(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1));
1317	<	LocalData := Qry.Current[i].Data^.sqldata;
1318	<	case rdFields[j].fdDataType of
1319	<	SQL_TIMESTAMP:
1320	<	begin
1321	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1322	<	if RecordNumber >= 0 then
1323	<	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime));
1324	<	LocalData := PChar(@LocalDate);
1325	<	end;
1326	<	SQL_TYPE_DATE:
1327	<	begin
1328	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1329	<	if RecordNumber >= 0 then
1330	<	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date;
1331	<	LocalData := PChar(@LocalInt);
1332	<	end;
1333	<	SQL_TYPE_TIME:
1334	<	begin
1335	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1336	<	if RecordNumber >= 0 then
1337	<	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time;
1338	<	LocalData := PChar(@LocalInt);
1339	<	end;
1340	<	SQL_SHORT, SQL_LONG:
1341	<	begin
1342	<	if (rdFields[j].fdDataScale = 0) then
1343	<	begin
1344	<	rdFields[j].fdDataSize := SizeOf(Integer);
1345	<	if RecordNumber >= 0 then
1346	<	LocalInt := Qry.Current[i].AsLong;
1347	<	LocalData := PChar(@LocalInt);
1348	<	end
1349	<	else if (rdFields[j].fdDataScale >= (-4)) then
1350	<	begin
1351	<	rdFields[j].fdDataSize := SizeOf(Currency);
1352	<	if RecordNumber >= 0 then
1353	<	LocalCurrency := Qry.Current[i].AsCurrency;
1354	<	LocalData := PChar(@LocalCurrency);
1355	<	end
1356	<	else begin
1357	<	rdFields[j].fdDataSize := SizeOf(Double);
1358	<	if RecordNumber >= 0 then
1359	<	LocalDouble := Qry.Current[i].AsDouble;
1360	<	LocalData := PChar(@LocalDouble);
1361	<	end;
1362	<	end;
1363	<	SQL_INT64:
1364	<	begin
1365	<	if (rdFields[j].fdDataScale = 0) then
1366	<	begin
1367	<	rdFields[j].fdDataSize := SizeOf(Int64);
1368	<	if RecordNumber >= 0 then
1369	<	LocalInt64 := Qry.Current[i].AsInt64;
1370	<	LocalData := PChar(@LocalInt64);
1371	<	end
1372	<	else if (rdFields[j].fdDataScale >= (-4)) then
1373	<	begin
1374	<	rdFields[j].fdDataSize := SizeOf(Currency);
1375	<	if RecordNumber >= 0 then
1376	<	LocalCurrency := Qry.Current[i].AsCurrency;
1377	<	LocalData := PChar(@LocalCurrency);
1378	<	end
1379	<	else begin
1380	<	rdFields[j].fdDataSize := SizeOf(Double);
1381	<	if RecordNumber >= 0 then
1382	<	LocalDouble := Qry.Current[i].AsDouble;
1383	<	LocalData := PChar(@LocalDouble);
1384	<	end
1385	<	end;
1386	<	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
1387	<	begin
1388	<	rdFields[j].fdDataSize := SizeOf(Double);
1389	<	if RecordNumber >= 0 then
1390	<	LocalDouble := Qry.Current[i].AsDouble;
1391	<	LocalData := PChar(@LocalDouble);
1392	<	end;
1393	<	SQL_VARYING:
1394	<	begin
1395	<	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1396	<	rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2);
1397	<	if RecordNumber >= 0 then
1398	<	begin
1399	<	if (rdFields[j].fdDataLength = 0) then
1400	<	LocalData := nil
1401	<	else
1402	<	LocalData := @Qry.Current[i].Data^.sqldata[2];
1403	<	end;
1404	<	end;
1405	<	else { SQL_TEXT, SQL_BLOB, SQL_ARRAY, SQL_QUAD }
1406	<	begin
1407	<	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1408	<	if (rdFields[j].fdDataType = SQL_TEXT) then
1409	<	rdFields[j].fdDataLength := rdFields[j].fdDataSize;
1410	<	end;
1411	<	end;
1412	<	if RecordNumber < 0 then
1413	<	begin
1414	<	rdFields[j].fdIsNull := True;
1415	<	rdFields[j].fdDataOfs := FRecordSize;
1416	<	Inc(FRecordSize, rdFields[j].fdDataSize);
1417	<	end
1418	<	else begin
1419	<	if rdFields[j].fdDataType = SQL_VARYING then
1420	<	begin
1421	<	if LocalData <> nil then
1422	<	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength)
1423	<	end
1424	<	else
1425	<	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize)
1426	<	end;
1427	<	end;
1428	<	end;
1429	<	WriteRecordCache(RecordNumber, PChar(p));
1430	<	end;
1431	<
1432	<	function TIBCustomDataSet.GetActiveBuf: PChar;
1433	<	begin
1434	<	case State of
1435	<	dsBrowse:
1436	<	if IsEmpty then
1437	<	result := nil
1438	<	else
1439	<	result := ActiveBuffer;
1440	<	dsEdit, dsInsert:
1441	<	result := ActiveBuffer;
1442	<	dsCalcFields:
1443	<	result := CalcBuffer;
1444	<	dsFilter:
1445	<	result := FFilterBuffer;
1446	<	dsNewValue:
1447	<	result := ActiveBuffer;
1448	<	dsOldValue:
1449	<	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
1450	<	PRecordData(FOldBuffer)^.rdRecordNumber) then
1451	<	result := FOldBuffer
1452	<	else
1453	<	result := ActiveBuffer;
1454	<	else if not FOpen then
1455	<	result := nil
1456	<	else
1457	<	result := ActiveBuffer;
1458	<	end;
1459	<	end;
1460	<
1461	<	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
1462	<	begin
1463	<	if Active then
1464	<	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
1465	<	else
1466	<	result := cusUnmodified;
1467	<	end;
1468	<
1469	<	function TIBCustomDataSet.GetDatabase: TIBDatabase;
1470	<	begin
1471	<	result := FBase.Database;
1472	<	end;
1473	<
1474	<	function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE;
1475	<	begin
1476	<	result := FBase.DBHandle;
1477	<	end;
1478	<
1479	<	function TIBCustomDataSet.GetDeleteSQL: TStrings;
1480	<	begin
1481	<	result := FQDelete.SQL;
1482	<	end;
1483	<
1484	<	function TIBCustomDataSet.GetInsertSQL: TStrings;
1485	<	begin
1486	<	result := FQInsert.SQL;
1487	<	end;
1488	<
1489	<	function TIBCustomDataSet.GetSQLParams: TIBXSQLDA;
1490	<	begin
1491	<	if not FInternalPrepared then
1492	<	InternalPrepare;
1493	<	result := FQSelect.Params;
1494	<	end;
1495	<
1496	<	function TIBCustomDataSet.GetRefreshSQL: TStrings;
1497	<	begin
1498	<	result := FQRefresh.SQL;
1499	<	end;
1500	<
1501	<	function TIBCustomDataSet.GetSelectSQL: TStrings;
1502	<	begin
1503	<	result := FQSelect.SQL;
1504	<	end;
1505	<
1506	<	function TIBCustomDataSet.GetStatementType: TIBSQLTypes;
1507	<	begin
1508	<	result := FQSelect.SQLType;
1509	<	end;
1510	<
1511	<	function TIBCustomDataSet.GetModifySQL: TStrings;
1512	<	begin
1513	<	result := FQModify.SQL;
1514	<	end;
1515	<
1516	<	function TIBCustomDataSet.GetTransaction: TIBTransaction;
1517	<	begin
1518	<	result := FBase.Transaction;
1519	<	end;
1520	<
1521	<	function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE;
1522	<	begin
1523	<	result := FBase.TRHandle;
1524	<	end;
1525	<
1526	<	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
1527	<	begin
1528	<	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1529	<	FUpdateObject.Apply(ukDelete)
1530	<	else
1531	<	begin
1532	<	SetInternalSQLParams(FQDelete, Buff);
1533	<	FQDelete.ExecQuery;
1534	<	end;
1535	<	with PRecordData(Buff)^ do
1536	<	begin
1537	<	rdUpdateStatus := usDeleted;
1538	<	rdCachedUpdateStatus := cusUnmodified;
1539	<	end;
1540	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1541	<	end;
1542	<
1543	<	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
1544	<	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1545	<	var
1546	<	fl: TList;
1547	<	CurBookmark: string;
1548	<	fld, val: Variant;
1549	<	i, fld_cnt: Integer;
1550	<	begin
1551	<	fl := TList.Create;
1552	<	try
1553	<	GetFieldList(fl, KeyFields);
1554	<	fld_cnt := fl.Count;
1555	<	CurBookmark := Bookmark;
1556	<	result := False;
1557	<	while ((not result) and (not EOF)) do
1558	<	begin
1559	<	i := 0;
1560	<	result := True;
1561	<	while (result and (i < fld_cnt)) do
1562	<	begin
1563	<	if fld_cnt > 1 then
1564	<	val := KeyValues[i]
1565	<	else
1566	<	val := KeyValues;
1567	<	fld := TField(fl[i]).Value;
1568	<	result := not (VarIsNull(val) xor VarIsNull(fld));
1569	<	if result and not VarIsNull(val) then
1570	<	begin
1571	<	try
1572	<	fld := VarAsType(fld, VarType(val));
1573	<	except
1574	<	on E: EVariantError do result := False;
1575	<	end;
1576	<	if Result then
1577	<	if TField(fl[i]).DataType = ftString then
1578	<	begin
1579	<	if (loCaseInsensitive in Options) then
1580	<	begin
1581	<	fld := AnsiUpperCase(fld);
1582	<	val := AnsiUpperCase(val);
1583	<	end;
1584	<	fld := TrimRight(fld);
1585	<	val := TrimRight(val);
1586	<	if (loPartialKey in Options) then
1587	<	result := result and (AnsiPos(val, fld) = 1)
1588	<	else
1589	<	result := result and (val = fld);
1590	<	end else
1591	<	result := result and (val = fld);
1592	<	end;
1593	<	Inc(i);
1594	<	end;
1595	<	if not result then
1596	<	Next;
1597	<	end;
1598	<	if not result then
1599	<	Bookmark := CurBookmark
1600	<	else
1601	<	CursorPosChanged;
1602	<	finally
1603	<	fl.Free;
1604	<	end;
1605	<	end;
1606	<
1607	<	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
1608	<	var
1609	<	i, j, k: Integer;
1610	<	pbd: PBlobDataArray;
1611	<	begin
1612	<	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
1613	<	j := 0;
1614	<	for i := 0 to FieldCount - 1 do
1615	<	if Fields[i].IsBlob then
1616	<	begin
1617	<	k := FMappedFieldPosition[Fields[i].FieldNo -1];
1618	<	if pbd^[j] <> nil then
1619	<	begin
1620	<	pbd^[j].Finalize;
1621	<	PISC_QUAD(
1622	<	PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ :=
1623	<	pbd^[j].BlobID;
1624	<	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
1625	<	end;
1626	<	Inc(j);
1627	<	end;
1628	<	if Assigned(FUpdateObject) then
1629	<	begin
1630	<	if (Qry = FQDelete) then
1631	<	FUpdateObject.Apply(ukDelete)
1632	<	else if (Qry = FQInsert) then
1633	<	FUpdateObject.Apply(ukInsert)
1634	<	else
1635	<	FUpdateObject.Apply(ukModify);
1636	<	end
1637	<	else begin
1638	<	SetInternalSQLParams(Qry, Buff);
1639	<	Qry.ExecQuery;
1640	<	end;
1641	<	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
1642	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
1643	<	SetModified(False);
1644	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1645	<	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
1646	<	InternalRefreshRow;
1647	<	end;
1648	<
1649	<	procedure TIBCustomDataSet.InternalRefreshRow;
1650	<	var
1651	<	Buff: PChar;
1652	<	SetCursor: Boolean;
1653	<	ofs: DWORD;
1654	<	Qry: TIBSQL;
1655	<	begin
1656	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1657	<	if SetCursor then
1658	<	Screen.Cursor := crHourGlass;
1659	<	try
1660	<	Buff := GetActiveBuf;
1661	<	if CanRefresh then
1662	<	begin
1663	<	if Buff <> nil then
1664	<	begin
1665	<	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
1666	<	begin
1667	<	Qry := TIBSQL.Create(self);
1668	<	Qry.Database := Database;
1669	<	Qry.Transaction := Transaction;
1670	<	Qry.GoToFirstRecordOnExecute := False;
1671	<	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
1672	<	end
1673	<	else
1674	<	Qry := FQRefresh;
1675	<	SetInternalSQLParams(Qry, Buff);
1676	<	Qry.ExecQuery;
1677	<	try
1678	<	if (Qry.SQLType = SQLExecProcedure) or
1679	<	(Qry.Next <> nil) then
1680	<	begin
1681	<	ofs := PRecordData(Buff)^.rdSavedOffset;
1682	<	FetchCurrentRecordToBuffer(Qry,
1683	<	PRecordData(Buff)^.rdRecordNumber,
1684	<	Buff);
1685	<	if FCachedUpdates and (ofs <> $FFFFFFFF) then
1686	<	begin
1687	<	PRecordData(Buff)^.rdSavedOffset := ofs;
1688	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1689	<	SaveOldBuffer(Buff);
1690	<	end;
1691	<	end;
1692	<	finally
1693	<	Qry.Close;
1694	<	end;
1695	<	if Qry <> FQRefresh then
1696	<	Qry.Free;
1697	<	end
1698	<	end
1699	<	else
1700	<	IBError(ibxeCannotRefresh, [nil]);
1701	<	finally
1702	<	if SetCursor and (Screen.Cursor = crHourGlass) then
1703	<	Screen.Cursor := crDefault;
1704	<	end;
1705	<	end;
1706	<
1707	<	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
1708	<	var
1709	<	NewBuffer, OldBuffer: PRecordData;
1710	<
1711	<	begin
1712	<	NewBuffer := nil;
1713	<	OldBuffer := nil;
1714	<	NewBuffer := PRecordData(AllocRecordBuffer);
1715	<	OldBuffer := PRecordData(AllocRecordBuffer);
1716	<	try
1717	<	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
1718	<	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
1719	<	case NewBuffer^.rdCachedUpdateStatus of
1720	<	cusInserted:
1721	<	begin
1722	<	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
1723	<	Inc(FDeletedRecords);
1724	<	end;
1725	<	cusModified,
1726	<	cusDeleted:
1727	<	begin
1728	<	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
1729	<	Dec(FDeletedRecords);
1730	<	CopyRecordBuffer(OldBuffer, NewBuffer);
1731	<	end;
1732	<	end;
1733	<
1734	<	if State in dsEditModes then
1735	<	Cancel;
1736	<
1737	<	WriteRecordCache(RecordNumber, PChar(NewBuffer));
1738	<
1739	<	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
1740	<	ReSync([]);
1741	<	finally
1742	<	FreeRecordBuffer(PChar(NewBuffer));
1743	<	FreeRecordBuffer(PChar(OldBuffer));
1744	<	end;
1745	<	end;
1746	<
1747	<	{ A visible record is one that is not truly deleted,
1748	<	and it is also listed in the FUpdateRecordTypes set }
1749	<
1750	<	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
1751	<	begin
1752	<	result := True;
1753	<	if not (State = dsOldValue) then
1754	<	result :=
1755	<	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
1756	<	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
1757	<	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
1758	<	end;
1759	<
1760	<
1761	<	function TIBCustomDataSet.LocateNext(const KeyFields: string;
1762	<	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1763	<	begin
1764	<	DisableControls;
1765	<	try
1766	<	result := InternalLocate(KeyFields, KeyValues, Options);
1767	<	finally
1768	<	EnableControls;
1769	<	end;
1770	<	end;
1771	<
1772	<	procedure TIBCustomDataSet.InternalPrepare;
1773	<	var
1774	<	SetCursor: Boolean;
1775	<	DidActivate: Boolean;
1776	<	begin
1777	<	if FInternalPrepared then
1778	<	Exit;
1779	<	DidActivate := False;
1780	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1781	<	if SetCursor then
1782	<	Screen.Cursor := crHourGlass;
1783	<	try
1784	<	ActivateConnection;
1785	<	DidActivate := ActivateTransaction;
1786	<	FBase.CheckDatabase;
1787	<	FBase.CheckTransaction;
1788	<	if FQSelect.SQL.Text <> '' then
1789	<	begin
1790	<	if not FQSelect.Prepared then
1791	<	begin
1792	<	FQSelect.ParamCheck := ParamCheck;
1793	<	FQSelect.Prepare;
1794	<	end;
1795	<	if (FQDelete.SQL.Text <> '') and (not FQDelete.Prepared) then
1796	<	FQDelete.Prepare;
1797	<	if (FQInsert.SQL.Text <> '') and (not FQInsert.Prepared) then
1798	<	FQInsert.Prepare;
1799	<	if (FQRefresh.SQL.Text <> '') and (not FQRefresh.Prepared) then
1800	<	FQRefresh.Prepare;
1801	<	if (FQModify.SQL.Text <> '') and (not FQModify.Prepared) then
1802	<	FQModify.Prepare;
1803	<	FInternalPrepared := True;
1804	<	InternalInitFieldDefs;
1805	<	end else
1806	<	IBError(ibxeEmptyQuery, [nil]);
1807	<	finally
1808	<	if DidActivate then
1809	<	DeactivateTransaction;
1810	<	if SetCursor and (Screen.Cursor = crHourGlass) then
1811	<	Screen.Cursor := crDefault;
1812	<	end;
1813	<	end;
1814	<
1815	<	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
1816	<	begin
1817	<	SetModified(Value);
1818	<	end;
1819	<
1820	<	procedure TIBCustomDataSet.RevertRecord;
1821	<	var
1822	<	Buff: PRecordData;
1823	<	begin
1824	<	if FCachedUpdates and FUpdatesPending then
1825	<	begin
1826	<	Buff := PRecordData(GetActiveBuf);
1827	<	InternalRevertRecord(Buff^.rdRecordNumber);
1828	<	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
1829	<	DataEvent(deRecordChange, 0);
1830	<	end;
1831	<	end;
1832	<
1833	<	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
1834	<	var
1835	<	OldBuffer: Pointer;
1836	<	procedure CopyOldBuffer;
1837	<	begin
1838	<	CopyRecordBuffer(Buffer, OldBuffer);
1839	<	if BlobFieldCount > 0 then
1840	<	FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream),
1841	<	0);
1842	<	end;
1843	<
1844	<	begin
1845	<	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
1846	<	begin
1847	<	OldBuffer := AllocRecordBuffer;
1848	<	try
1849	<	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
1850	<	begin
1851	<	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
1852	<	FILE_END);
1853	<	CopyOldBuffer;
1854	<	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
1855	<	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
1856	<	FILE_BEGIN, Buffer);
1857	<	end
1858	<	else begin
1859	<	CopyOldBuffer;
1860	<	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
1861	<	OldBuffer);
1862	<	end;
1863	<	finally
1864	<	FreeRecordBuffer(PChar(OldBuffer));
1865	<	end;
1866	<	end;
1867	<	end;
1868	<
1869	<	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
1870	<	begin
1871	<	if (Value <= 0) then
1872	<	FBufferChunks := BufferCacheSize
1873	<	else
1874	<	FBufferChunks := Value;
1875	<	end;
1876	<
1877	<	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
1878	<	begin
1879	<	if (FBase.Database <> Value) then
1880	<	begin
1881	<	CheckDatasetClosed;
1882	<	FBase.Database := Value;
1883	<	FQDelete.Database := Value;
1884	<	FQInsert.Database := Value;
1885	<	FQRefresh.Database := Value;
1886	<	FQSelect.Database := Value;
1887	<	FQModify.Database := Value;
1888	<	end;
1889	<	end;
1890	<
1891	<	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
1892	<	begin
1893	<	if FQDelete.SQL.Text <> Value.Text then
1894	<	begin
1895	<	Disconnect;
1896	<	FQDelete.SQL.Assign(Value);
1897	<	end;
1898	<	end;
1899	<
1900	<	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
1901	<	begin
1902	<	if FQInsert.SQL.Text <> Value.Text then
1903	<	begin
1904	<	Disconnect;
1905	<	FQInsert.SQL.Assign(Value);
1906	<	end;
1907	<	end;
1908	<
1909	<	procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
1910	<	var
1911	<	i, j: Integer;
1912	<	cr, data: PChar;
1913	<	fn, st: string;
1914	<	OldBuffer: Pointer;
1915	<	ts: TTimeStamp;
1916	<	begin
1917	<	if (Buffer = nil) then
1918	<	IBError(ibxeBufferNotSet, [nil]);
1919	<	if (not FInternalPrepared) then
1920	<	InternalPrepare;
1921	<	OldBuffer := nil;
1922	<	try
1923	<	for i := 0 to Qry.Params.Count - 1 do
1924	<	begin
1925	<	fn := Qry.Params[i].Name;
1926	<	if (Pos('OLD_', fn) = 1) then {mbcs ok}
1927	<	begin
1928	<	fn := Copy(fn, 5, Length(fn));
1929	<	if not Assigned(OldBuffer) then
1930	<	begin
1931	<	OldBuffer := AllocRecordBuffer;
1932	<	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
1933	<	end;
1934	<	cr := OldBuffer;
1935	<	end
1936	<	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
1937	<	begin
1938	<	fn := Copy(fn, 5, Length(fn));
1939	<	cr := Buffer;
1940	<	end
1941	<	else
1942	<	cr := Buffer;
1943	<	j := FQSelect.FieldIndex[fn] + 1;
1944	<	if (j > 0) then
1945	<	with PRecordData(cr)^ do
1946	<	begin
1947	<	if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize}
1948	<	begin
1949	<	PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey;
1950	<	continue;
1951	<	end;
1952	<	if rdFields[j].fdIsNull then
1953	<	Qry.Params[i].IsNull := True
1954	<	else begin
1955	<	Qry.Params[i].IsNull := False;
1956	<	data := cr + rdFields[j].fdDataOfs;
1957	<	case rdFields[j].fdDataType of
1958	<	SQL_TEXT, SQL_VARYING:
1959	<	begin
1960	<	SetString(st, data, rdFields[j].fdDataLength);
1961	<	Qry.Params[i].AsString := st;
1962	<	end;
1963	<	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
1964	<	Qry.Params[i].AsDouble := PDouble(data)^;
1965	<	SQL_SHORT, SQL_LONG:
1966	<	begin
1967	<	if rdFields[j].fdDataScale = 0 then
1968	<	Qry.Params[i].AsLong := PLong(data)^
1969	<	else if rdFields[j].fdDataScale >= (-4) then
1970	<	Qry.Params[i].AsCurrency := PCurrency(data)^
1971	<	else
1972	<	Qry.Params[i].AsDouble := PDouble(data)^;
1973	<	end;
1974	<	SQL_INT64:
1975	<	begin
1976	<	if rdFields[j].fdDataScale = 0 then
1977	<	Qry.Params[i].AsInt64 := PInt64(data)^
1978	<	else if rdFields[j].fdDataScale >= (-4) then
1979	<	Qry.Params[i].AsCurrency := PCurrency(data)^
1980	<	else
1981	<	Qry.Params[i].AsDouble := PDouble(data)^;
1982	<	end;
1983	<	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
1984	<	Qry.Params[i].AsQuad := PISC_QUAD(data)^;
1985	<	SQL_TYPE_DATE:
1986	<	begin
1987	<	ts.Date := PInt(data)^;
1988	<	ts.Time := 0;
1989	<	Qry.Params[i].AsDate :=
1990	<	TimeStampToDateTime(ts);
1991	<	end;
1992	<	SQL_TYPE_TIME:
1993	<	begin
1994	<	ts.Date := 0;
1995	<	ts.Time := PInt(data)^;
1996	<	Qry.Params[i].AsTime :=
1997	<	TimeStampToDateTime(ts);
1998	<	end;
1999	<	SQL_TIMESTAMP:
2000	<	Qry.Params[i].AsDateTime :=
2001	<	TimeStampToDateTime(
2002	<	MSecsToTimeStamp(PDouble(data)^));
2003	<	end;
2004	<	end;
2005	<	end;
2006	<	end;
2007	<	finally
2008	<	if (OldBuffer <> nil) then
2009	<	FreeRecordBuffer(PChar(OldBuffer));
2010	<	end;
2011	<	end;
2012	<
2013	<	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2014	<	begin
2015	<	if FQRefresh.SQL.Text <> Value.Text then
2016	<	begin
2017	<	Disconnect;
2018	<	FQRefresh.SQL.Assign(Value);
2019	<	end;
2020	<	end;
2021	<
2022	<	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2023	<	begin
2024	<	if FQSelect.SQL.Text <> Value.Text then
2025	<	begin
2026	<	Disconnect;
2027	<	FQSelect.SQL.Assign(Value);
2028	<	end;
2029	<	end;
2030	<
2031	<	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2032	<	begin
2033	<	if FQModify.SQL.Text <> Value.Text then
2034	<	begin
2035	<	Disconnect;
2036	<	FQModify.SQL.Assign(Value);
2037	<	end;
2038	<	end;
2039	<
2040	<	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2041	<	begin
2042	<	if (FBase.Transaction <> Value) then
2043	<	begin
2044	<	CheckDatasetClosed;
2045	<	FBase.Transaction := Value;
2046	<	FQDelete.Transaction := Value;
2047	<	FQInsert.Transaction := Value;
2048	<	FQRefresh.Transaction := Value;
2049	<	FQSelect.Transaction := Value;
2050	<	FQModify.Transaction := Value;
2051	<	end;
2052	<	end;
2053	<
2054	<	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2055	<	begin
2056	<	CheckDatasetClosed;
2057	<	FUniDirectional := Value;
2058	<	end;
2059	<
2060	<	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2061	<	begin
2062	<	FUpdateRecordTypes := Value;
2063	<	if Active then
2064	<	First;
2065	<	end;
2066	<
2067	<	procedure TIBCustomDataSet.RefreshParams;
2068	<	var
2069	<	DataSet: TDataSet;
2070	<	begin
2071	<	DisableControls;
2072	<	try
2073	<	if FDataLink.DataSource <> nil then
2074	<	begin
2075	<	DataSet := FDataLink.DataSource.DataSet;
2076	<	if DataSet <> nil then
2077	<	if DataSet.Active and (DataSet.State <> dsSetKey) then
2078	<	begin
2079	<	Close;
2080	<	Open;
2081	<	end;
2082	<	end;
2083	<	finally
2084	<	EnableControls;
2085	<	end;
2086	<	end;
2087	<
2088	<
2089	<	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2090	<	begin
2091	<	if FOpen then
2092	<	InternalClose;
2093	<	if FInternalPrepared then
2094	<	InternalUnPrepare;
2095	<	end;
2096	<
2097	<	{ I can "undelete" uninserted records (make them "inserted" again).
2098	<	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2099	<	procedure TIBCustomDataSet.Undelete;
2100	<	var
2101	<	Buff: PRecordData;
2102	<	begin
2103	<	CheckActive;
2104	<	Buff := PRecordData(GetActiveBuf);
2105	<	with Buff^ do
2106	<	begin
2107	<	if rdCachedUpdateStatus = cusUninserted then
2108	<	begin
2109	<	rdCachedUpdateStatus := cusInserted;
2110	<	Dec(FDeletedRecords);
2111	<	end
2112	<	else if (rdUpdateStatus = usDeleted) and
2113	<	(rdCachedUpdateStatus = cusDeleted) then
2114	<	begin
2115	<	rdCachedUpdateStatus := cusUnmodified;
2116	<	rdUpdateStatus := usUnmodified;
2117	<	Dec(FDeletedRecords);
2118	<	end;
2119	<	WriteRecordCache(rdRecordNumber, PChar(Buff));
2120	<	end;
2121	<	end;
2122	<
2123	<	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2124	<	begin
2125	<	if Active then
2126	<	if GetActiveBuf <> nil then
2127	<	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2128	<	else
2129	<	result := usUnmodified
2130	<	else
2131	<	result := usUnmodified;
2132	<	end;
2133	<
2134	<	function TIBCustomDataSet.IsSequenced: Boolean;
2135	<	begin
2136	<	Result := Assigned( FQSelect ) and FQSelect.EOF;
2137	<	end;
2138	<
2139	<	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
2140	<	Origin: Integer): Integer;
2141	<	var
2142	<	OldCacheSize: Integer;
2143	<	begin
2144	<	if (FCache = FBufferCache) then
2145	<	begin
2146	<	case Origin of
2147	<	FILE_BEGIN:    FBPos := Offset;
2148	<	FILE_CURRENT:  FBPos := FBPos + Offset;
2149	<	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
2150	<	end;
2151	<	OldCacheSize := FCacheSize;
2152	<	while (FBPos >= DWORD(FCacheSize)) do
2153	<	Inc(FCacheSize, FBufferChunkSize);
2154	<	if FCacheSize > OldCacheSize then
2155	<	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
2156	<	result := FBPos;
2157	<	end
2158	<	else begin
2159	<	case Origin of
2160	<	FILE_BEGIN:    FOBPos := Offset;
2161	<	FILE_CURRENT:  FOBPos := FOBPos + Offset;
2162	<	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
2163	<	end;
2164	<	OldCacheSize := FOldCacheSize;
2165	<	while (FBPos >= DWORD(FOldCacheSize)) do
2166	<	Inc(FOldCacheSize, FBufferChunkSize);
2167	<	if FOldCacheSize > OldCacheSize then
2168	<	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
2169	<	result := FOBPos;
2170	<	end;
2171	<	end;
2172	<
2173	<	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2174	<	Buffer: PChar);
2175	<	var
2176	<	pCache: PChar;
2177	<	bOld: Boolean;
2178	<	begin
2179	<	bOld := (FCache = FOldBufferCache);
2180	<	pCache := PChar(AdjustPosition(FCache, Offset, Origin));
2181	<	if not bOld then
2182	<	pCache := FBufferCache + Integer(pCache)
2183	<	else
2184	<	pCache := FOldBufferCache + Integer(pCache);
2185	<	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
2186	<	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2187	<	end;
2188	<
2189	<	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
2190	<	ReadOldBuffer: Boolean);
2191	<	begin
2192	<	if FUniDirectional then
2193	<	RecordNumber := RecordNumber mod UniCache;
2194	<	if (ReadOldBuffer) then
2195	<	begin
2196	<	ReadRecordCache(RecordNumber, Buffer, False);
2197	<	if FCachedUpdates and
2198	<	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
2199	<	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2200	<	Buffer)
2201	<	else
2202	<	if ReadOldBuffer and
2203	<	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
2204	<	CopyRecordBuffer( FOldBuffer, Buffer )
2205	<	end
2206	<	else
2207	<	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2208	<	end;
2209	<
2210	<	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2211	<	Buffer: PChar);
2212	<	var
2213	<	pCache: PChar;
2214	<	bOld: Boolean;
2215	<	dwEnd: DWORD;
2216	<	begin
2217	<	bOld := (FCache = FOldBufferCache);
2218	<	pCache := PChar(AdjustPosition(FCache, Offset, Origin));
2219	<	if not bOld then
2220	<	pCache := FBufferCache + Integer(pCache)
2221	<	else
2222	<	pCache := FOldBufferCache + Integer(pCache);
2223	<	Move(Buffer^, pCache^, FRecordBufferSize);
2224	<	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2225	<	if not bOld then
2226	<	begin
2227	<	if (dwEnd > FBEnd) then
2228	<	FBEnd := dwEnd;
2229	<	end
2230	<	else begin
2231	<	if (dwEnd > FOBEnd) then
2232	<	FOBEnd := dwEnd;
2233	<	end;
2234	<	end;
2235	<
2236	<	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
2237	<	begin
2238	<	if RecordNumber >= 0 then
2239	<	begin
2240	<	if FUniDirectional then
2241	<	RecordNumber := RecordNumber mod UniCache;
2242	<	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2243	<	end;
2244	<	end;
2245	<
2246	<	function TIBCustomDataSet.AllocRecordBuffer: PChar;
2247	<	begin
2248	<	result := nil;
2249	<	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
2250	<	Move(FModelBuffer^, result^, FRecordBufferSize);
2251	<	end;
2252	<
2253	<	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
2254	<	var
2255	<	pb: PBlobDataArray;
2256	<	fs: TIBBlobStream;
2257	<	Buff: PChar;
2258	<	bTr, bDB: Boolean;
2259	<	begin
2260	<	Buff := GetActiveBuf;
2261	<	if Buff = nil then
2262	<	begin
2263	<	fs := TIBBlobStream.Create;
2264	<	fs.Mode := bmReadWrite;
2265	<	FBlobStreamList.Add(Pointer(fs));
2266	<	result := TIBDSBlobStream.Create(Field, fs, Mode);
2267	<	exit;
2268	<	end;
2269	<	pb := PBlobDataArray(Buff + FBlobCacheOffset);
2270	<	if pb^[Field.Offset] = nil then
2271	<	begin
2272	<	AdjustRecordOnInsert(Buff);
2273	<	pb^[Field.Offset] := TIBBlobStream.Create;
2274	<	fs := pb^[Field.Offset];
2275	<	FBlobStreamList.Add(Pointer(fs));
2276	<	fs.Mode := bmReadWrite;
2277	<	fs.Database := Database;
2278	<	fs.Transaction := Transaction;
2279	<	fs.BlobID :=
2280	<	PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
2281	<	if (CachedUpdates) then
2282	<	begin
2283	<	bTr := not Transaction.InTransaction;
2284	<	bDB := not Database.Connected;
2285	<	if bDB then
2286	<	Database.Open;
2287	<	if bTr then
2288	<	Transaction.StartTransaction;
2289	<	fs.Seek(0, soFromBeginning);
2290	<	if bTr then
2291	<	Transaction.Commit;
2292	<	if bDB then
2293	<	Database.Close;
2294	<	end;
2295	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
2296	<	end else
2297	<	fs := pb^[Field.Offset];
2298	<	result := TIBDSBlobStream.Create(Field, fs, Mode);
2299	<	end;
2300	<
2301	<	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
2302	<	const
2303	<	CMPLess = -1;
2304	<	CMPEql  =  0;
2305	<	CMPGtr  =  1;
2306	<	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
2307	<	(CMPGtr, CMPEql));
2308	<	begin
2309	<	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
2310	<
2311	<	if Result = 2 then
2312	<	begin
2313	<	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
2314	<	Result := CMPLess
2315	<	else
2316	<	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
2317	<	Result := CMPGtr
2318	<	else
2319	<	Result := CMPEql;
2320	<	end;
2321	<	end;
2322	<
2323	<	procedure TIBCustomDataSet.DoBeforeDelete;
2324	<	var
2325	<	Buff: PRecordData;
2326	<	begin
2327	<	if not CanDelete then
2328	<	IBError(ibxeCannotDelete, [nil]);
2329	<	Buff := PRecordData(GetActiveBuf);
2330	<	if FCachedUpdates and
2331	<	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
2332	<	SaveOldBuffer(PChar(Buff));
2333	<	inherited;
2334	<	end;
2335	<
2336	<	procedure TIBCustomDataSet.DoBeforeEdit;
2337	<	var
2338	<	Buff: PRecordData;
2339	<	begin
2340	<	Buff := PRecordData(GetActiveBuf);
2341	<	if not(CanEdit or (FQModify.SQL.Count <> 0) or
2342	<	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
2343	<	IBError(ibxeCannotUpdate, [nil]);
2344	<	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
2345	<	SaveOldBuffer(PChar(Buff));
2346	<	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
2347	<	inherited;
2348	<	end;
2349	<
2350	<	procedure TIBCustomDataSet.DoBeforeInsert;
2351	<	begin
2352	<	if not CanInsert then
2353	<	IBError(ibxeCannotInsert, [nil]);
2354	<	inherited;
2355	<	end;
2356	<
2357	<	procedure TIBCustomDataSet.FetchAll;
2358	<	var
2359	<	SetCursor: Boolean;
2360	<	CurBookmark: string;
2361	<	begin
2362	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2363	<	if SetCursor then
2364	<	Screen.Cursor := crHourGlass;
2365	<	try
2366	<	if FQSelect.EOF or not FQSelect.Open then
2367	<	exit;
2368	<	DisableControls;
2369	<	try
2370	<	CurBookmark := Bookmark;
2371	<	Last;
2372	<	Bookmark := CurBookmark;
2373	<	finally
2374	<	EnableControls;
2375	<	end;
2376	<	finally
2377	<	if SetCursor and (Screen.Cursor = crHourGlass) then
2378	<	Screen.Cursor := crDefault;
2379	<	end;
2380	<	end;
2381	<
2382	<	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
2383	<	begin
2384	<	FreeMem(Buffer);
2385	<	Buffer := nil;
2386	<	end;
2387	<
2388	<	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
2389	<	begin
2390	<	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
2391	<	end;
2392	<
2393	<	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
2394	<	begin
2395	<	result := PRecordData(Buffer)^.rdBookmarkFlag;
2396	<	end;
2397	<
2398	<	function TIBCustomDataSet.GetCanModify: Boolean;
2399	<	begin
2400	<	result := (FQInsert.SQL.Text <> '') or
2401	<	(FQModify.SQL.Text <> '') or
2402	<	(FQDelete.SQL.Text <> '') or
2403	<	(Assigned(FUpdateObject));
2404	<	end;
2405	<
2406	<	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
2407	<	begin
2408	<	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
2409	<	begin
2410	<	UpdateCursorPos;
2411	<	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
2412	<	result := True;
2413	<	end
2414	<	else
2415	<	result := False;
2416	<	end;
2417	<
2418	<	function TIBCustomDataSet.GetDataSource: TDataSource;
2419	<	begin
2420	<	if FDataLink = nil then
2421	<	result := nil
2422	<	else
2423	<	result := FDataLink.DataSource;
2424	<	end;
2425	<
2426	<	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
2427	<	begin
2428	<	Result := DefaultFieldClasses[FieldType];
2429	<	end;
2430	<
2431	<	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
2432	<	begin
2433	<	result := GetFieldData(FieldByNumber(FieldNo), buffer);
2434	<	end;
2435	<
2436	<	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
2437	<	var
2438	<	Buff, Data: PChar;
2439	<	CurrentRecord: PRecordData;
2440	<	begin
2441	<	result := False;
2442	<	Buff := GetActiveBuf;
2443	<	if (Buff = nil) or
2444	<	(not IsVisible(Buff)) then
2445	<	exit;
2446	<	{ The intention here is to stuff the buffer with the data for the
2447	<	referenced field for the current record }
2448	<	CurrentRecord := PRecordData(Buff);
2449	<	if (Field.FieldNo < 0) then
2450	<	begin
2451	<	Inc(Buff, FRecordSize + Field.Offset);
2452	<	result := Boolean(Buff[0]);
2453	<	if result and (Buffer <> nil) then
2454	<	Move(Buff[1], Buffer^, Field.DataSize);
2455	<	end
2456	<	else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
2457	<	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
2458	<	begin
2459	<	result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull;
2460	<	if result and (Buffer <> nil) then
2461	<	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do
2462	<	begin
2463	<	Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs;
2464	<	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
2465	<	begin
2466	<	Move(Data^, Buffer^, fdDataLength);
2467	<	PChar(Buffer)[fdDataLength] := #0;
2468	<	end
2469	<	else
2470	<	Move(Data^, Buffer^, Field.DataSize);
2471	<	end;
2472	<	end;
2473	<	end;
2474	<
2475	<	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
2476	<	opposed to 0-based indexes.
2477	<	This is because we want LastRecordNumber/RecordCount = 1 }
2478	<
2479	<	function TIBCustomDataSet.GetRecNo: Integer;
2480	<	begin
2481	<	if GetActiveBuf = nil then
2482	<	result := 0
2483	<	else
2484	<	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
2485	<	end;
2486	<
2487	<	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
2488	<	DoCheck: Boolean): TGetResult;
2489	<	var
2490	<	Accept: Boolean;
2491	<	SaveState: TDataSetState;
2492	<	begin
2493	<	Result := grOK;
2494	<	if Filtered and Assigned(OnFilterRecord) then
2495	<	begin
2496	<	Accept := False;
2497	<	SaveState := SetTempState(dsFilter);
2498	<	while not Accept do
2499	<	begin
2500	<	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2501	<	if Result <> grOK then
2502	<	break;
2503	<	FFilterBuffer := Buffer;
2504	<	try
2505	<	Accept := True;
2506	<	OnFilterRecord(Self, Accept);
2507	<	if not Accept and (GetMode = gmCurrent) then
2508	<	GetMode := gmPrior;
2509	<	except
2510	<	//        Application.HandleException(Self);
2511	<	end;
2512	<	end;
2513	<	RestoreState(SaveState);
2514	<	end
2515	<	else
2516	<	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2517	<	end;
2518	<
2519	<	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
2520	<	DoCheck: Boolean): TGetResult;
2521	<	begin
2522	<	result := grError;
2523	<	case GetMode of
2524	<	gmCurrent: begin
2525	<	if (FCurrentRecord >= 0) then begin
2526	<	if FCurrentRecord < FRecordCount then
2527	<	ReadRecordCache(FCurrentRecord, Buffer, False)
2528	<	else begin
2529	<	while (not FQSelect.EOF) and
2530	<	(FQSelect.Next <> nil) and
2531	<	(FCurrentRecord >= FRecordCount) do begin
2532	<	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
2533	<	Inc(FRecordCount);
2534	<	end;
2535	<	FCurrentRecord := FRecordCount - 1;
2536	<	if (FCurrentRecord >= 0) then
2537	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2538	<	end;
2539	<	result := grOk;
2540	<	end else
2541	<	result := grBOF;
2542	<	end;
2543	<	gmNext: begin
2544	<	result := grOk;
2545	<	if FCurrentRecord = FRecordCount then
2546	<	result := grEOF
2547	<	else if FCurrentRecord = FRecordCount - 1 then begin
2548	<	if (not FQSelect.EOF) then begin
2549	<	FQSelect.Next;
2550	<	Inc(FCurrentRecord);
2551	<	end;
2552	<	if (FQSelect.EOF) then begin
2553	<	result := grEOF;
2554	<	end else begin
2555	<	Inc(FRecordCount);
2556	<	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
2557	<	end;
2558	<	end else if (FCurrentRecord < FRecordCount) then begin
2559	<	Inc(FCurrentRecord);
2560	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2561	<	end;
2562	<	end;
2563	<	else { gmPrior }
2564	<	begin
2565	<	if (FCurrentRecord = 0) then begin
2566	<	Dec(FCurrentRecord);
2567	<	result := grBOF;
2568	<	end else if (FCurrentRecord > 0) and
2569	<	(FCurrentRecord <= FRecordCount) then begin
2570	<	Dec(FCurrentRecord);
2571	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2572	<	result := grOk;
2573	<	end else if (FCurrentRecord = -1) then
2574	<	result := grBOF;
2575	<	end;
2576	<	end;
2577	<	if result = grOk then
2578	<	result := AdjustCurrentRecord(Buffer, GetMode);
2579	<	if result = grOk then with PRecordData(Buffer)^ do begin
2580	<	rdBookmarkFlag := bfCurrent;
2581	<	GetCalcFields(Buffer);
2582	<	end else if (result = grEOF) then begin
2583	<	CopyRecordBuffer(FModelBuffer, Buffer);
2584	<	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2585	<	end else if (result = grBOF) then begin
2586	<	CopyRecordBuffer(FModelBuffer, Buffer);
2587	<	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
2588	<	end else if (result = grError) then begin
2589	<	CopyRecordBuffer(FModelBuffer, Buffer);
2590	<	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2591	<	end;;
2592	<	end;
2593	<
2594	<	function TIBCustomDataSet.GetRecordCount: Integer;
2595	<	begin
2596	<	result := FRecordCount - FDeletedRecords;
2597	<	end;
2598	<
2599	<	function TIBCustomDataSet.GetRecordSize: Word;
2600	<	begin
2601	<	result := FRecordBufferSize;
2602	<	end;
2603	<
2604	<	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
2605	<	begin
2606	<	CheckEditState;
2607	<	begin
2608	<	{ When adding records, we *always* append.
2609	<	Insertion is just too costly }
2610	<	AdjustRecordOnInsert(Buffer);
2611	<	with PRecordData(Buffer)^ do
2612	<	begin
2613	<	rdUpdateStatus := usInserted;
2614	<	rdCachedUpdateStatus := cusInserted;
2615	<	end;
2616	<	if not CachedUpdates then
2617	<	InternalPostRecord(FQInsert, Buffer)
2618	<	else begin
2619	<	WriteRecordCache(FCurrentRecord, Buffer);
2620	<	FUpdatesPending := True;
2621	<	end;
2622	<	Inc(FRecordCount);
2623	<	InternalSetToRecord(Buffer);
2624	<	end
2625	<	end;
2626	<
2627	<	procedure TIBCustomDataSet.InternalCancel;
2628	<	var
2629	<	Buff: PChar;
2630	<	CurRec: Integer;
2631	<	begin
2632	<	inherited;
2633	<	Buff := GetActiveBuf;
2634	<	if Buff <> nil then begin
2635	<	CurRec := FCurrentRecord;
2636	<	AdjustRecordOnInsert(Buff);
2637	<	if (State = dsEdit) then begin
2638	<	CopyRecordBuffer(FOldBuffer, Buff);
2639	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2640	<	end else begin
2641	<	CopyRecordBuffer(FModelBuffer, Buff);
2642	<	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
2643	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2644	<	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
2645	<	FCurrentRecord := CurRec;
2646	<	end;
2647	<	end;
2648	<	end;
2649	<
2650	<
2651	<	procedure TIBCustomDataSet.InternalClose;
2652	<	begin
2653	<	if FDidActivate then
2654	<	DeactivateTransaction;
2655	<	FQSelect.Close;
2656	<	ClearBlobCache;
2657	<	FreeRecordBuffer(FModelBuffer);
2658	<	FreeRecordBuffer(FOldBuffer);
2659	<	FCurrentRecord := -1;
2660	<	FOpen := False;
2661	<	FRecordCount := 0;
2662	<	FDeletedRecords := 0;
2663	<	FRecordSize := 0;
2664	<	FBPos := 0;
2665	<	FOBPos := 0;
2666	<	FCacheSize := 0;
2667	<	FOldCacheSize := 0;
2668	<	FBEnd := 0;
2669	<	FOBEnd := 0;
2670	<	FreeMem(FBufferCache);
2671	<	FBufferCache := nil;
2672	<	FreeMem(FOldBufferCache);
2673	<	FOldBufferCache := nil;
2674	<	BindFields(False);
2675	<	if DefaultFields then DestroyFields;
2676	<	end;
2677	<
2678	<	procedure TIBCustomDataSet.InternalDelete;
2679	<	var
2680	<	Buff: PChar;
2681	<	SetCursor: Boolean;
2682	<	begin
2683	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2684	<	if SetCursor then
2685	<	Screen.Cursor := crHourGlass;
2686	<	try
2687	<	Buff := GetActiveBuf;
2688	<	if CanDelete then
2689	<	begin
2690	<	if not CachedUpdates then
2691	<	InternalDeleteRecord(FQDelete, Buff)
2692	<	else
2693	<	begin
2694	<	with PRecordData(Buff)^ do
2695	<	begin
2696	<	if rdCachedUpdateStatus = cusInserted then
2697	<	rdCachedUpdateStatus := cusUninserted
2698	<	else begin
2699	<	rdUpdateStatus := usDeleted;
2700	<	rdCachedUpdateStatus := cusDeleted;
2701	<	end;
2702	<	end;
2703	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2704	<	end;
2705	<	Inc(FDeletedRecords);
2706	<	FUpdatesPending := True;
2707	<	end else
2708	<	IBError(ibxeCannotDelete, [nil]);
2709	<	finally
2710	<	if SetCursor and (Screen.Cursor = crHourGlass) then
2711	<	Screen.Cursor := crDefault;
2712	<	end;
2713	<	end;
2714	<
2715	<	procedure TIBCustomDataSet.InternalFirst;
2716	<	begin
2717	<	FCurrentRecord := -1;
2718	<	end;
2719	<
2720	<	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
2721	<	begin
2722	<	FCurrentRecord := PInteger(Bookmark)^;
2723	<	end;
2724	<
2725	<	procedure TIBCustomDataSet.InternalHandleException;
2726	<	begin
2727	<	Application.HandleException(Self)
2728	<	end;
2729	<
2730	<	procedure TIBCustomDataSet.InternalInitFieldDefs;
2731	<	const
2732	<	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
2733	<	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
2734	<	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
2735	<	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
2736	<	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
2737	<	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
2738	<	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
2739	<	var
2740	<	FieldType: TFieldType;
2741	<	FieldSize: Word;
2742	<	FieldNullable : Boolean;
2743	<	i, FieldPosition, FieldPrecision: Integer;
2744	<	FieldAliasName: string;
2745	<	RelationName, FieldName: string;
2746	<	Query : TIBSQL;
2747	<	FieldIndex: Integer;
2748	<	FRelationNodes : TRelationNode;
2749	<
2750	<	function Add_Node(Relation, Field : String) : TRelationNode;
2751	<	var
2752	<	FField : TFieldNode;
2753	<	begin
2754	<	if FRelationNodes.RelationName = '' then
2755	<	Result := FRelationNodes
2756	<	else
2757	<	begin
2758	<	Result := TRelationNode.Create;
2759	<	Result.NextRelation := FRelationNodes;
2760	<	end;
2761	<	Result.RelationName := Relation;
2762	<	FRelationNodes := Result;
2763	<	Query.Params[0].AsString := Relation;
2764	<	Query.ExecQuery;
2765	<	while not Query.Eof do
2766	<	begin
2767	<	FField := TFieldNode.Create;
2768	<	FField.FieldName := Query.Fields[2].AsString;
2769	<	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
2770	<	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
2771	<	FField.NextField := Result.FieldNodes;
2772	<	Result.FieldNodes := FField;
2773	<	Query.Next;
2774	<	end;
2775	<	Query.Close;
2776	<	end;
2777	<
2778	<	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
2779	<	var
2780	<	FRelation : TRelationNode;
2781	<	FField : TFieldNode;
2782	<	begin
2783	<	FRelation := FRelationNodes;
2784	<	while Assigned(FRelation) and
2785	<	(FRelation.RelationName <> Relation) do
2786	<	FRelation := FRelation.NextRelation;
2787	<	if not Assigned(FRelation) then
2788	<	FRelation := Add_Node(Relation, Field);
2789	<	Result := false;
2790	<	FField := FRelation.FieldNodes;
2791	<	while Assigned(FField) do
2792	<	if FField.FieldName = Field then
2793	<	begin
2794	<	Result := Ffield.COMPUTED_BLR;
2795	<	Exit;
2796	<	end
2797	<	else
2798	<	FField := Ffield.NextField;
2799	<	end;
2800	<
2801	<	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
2802	<	var
2803	<	FRelation : TRelationNode;
2804	<	FField : TFieldNode;
2805	<	begin
2806	<	FRelation := FRelationNodes;
2807	<	while Assigned(FRelation) and
2808	<	(FRelation.RelationName <> Relation) do
2809	<	FRelation := FRelation.NextRelation;
2810	<	if not Assigned(FRelation) then
2811	<	FRelation := Add_Node(Relation, Field);
2812	<	Result := false;
2813	<	FField := FRelation.FieldNodes;
2814	<	while Assigned(FField) do
2815	<	if FField.FieldName = Field then
2816	<	begin
2817	<	Result := Ffield.DEFAULT_VALUE;
2818	<	Exit;
2819	<	end
2820	<	else
2821	<	FField := Ffield.NextField;
2822	<	end;
2823	<
2824	<	Procedure FreeNodes;
2825	<	var
2826	<	FRelation : TRelationNode;
2827	<	FField : TFieldNode;
2828	<	begin
2829	<	while Assigned(FRelationNodes) do
2830	<	begin
2831	<	While Assigned(FRelationNodes.FieldNodes) do
2832	<	begin
2833	<	FField := FRelationNodes.FieldNodes.NextField;
2834	<	FRelationNodes.FieldNodes.Free;
2835	<	FRelationNodes.FieldNodes := FField;
2836	<	end;
2837	<	FRelation := FRelationNodes.NextRelation;
2838	<	FRelationNodes.Free;
2839	<	FRelationNodes := FRelation;
2840	<	end;
2841	<	end;
2842	<
2843	<	begin
2844	<	if not InternalPrepared then
2845	<	begin
2846	<	InternalPrepare;
2847	<	exit;
2848	<	end;
2849	<	FRelationNodes := TRelationNode.Create;
2850	<	FNeedsRefresh := False;
2851	<	Database.InternalTransaction.StartTransaction;
2852	<	Query := TIBSQL.Create(self);
2853	<	try
2854	<	Query.Database := DataBase;
2855	<	Query.Transaction := Database.InternalTransaction;
2856	<	FieldDefs.BeginUpdate;
2857	<	FieldDefs.Clear;
2858	<	FieldIndex := 0;
2859	<	if (Length(FMappedFieldPosition) < FQSelect.Current.Count) then
2860	<	SetLength(FMappedFieldPosition, FQSelect.Current.Count);
2861	<	Query.SQL.Text := DefaultSQL;
2862	<	Query.Prepare;
2863	<	for i := 0 to FQSelect.Current.Count - 1 do
2864	<	with FQSelect.Current[i].Data^ do
2865	<	begin
2866	<	{ Get the field name }
2867	<	SetString(FieldAliasName, aliasname, aliasname_length);
2868	<	SetString(RelationName, relname, relname_length);
2869	<	SetString(FieldName, sqlname, sqlname_length);
2870	<	FieldSize := 0;
2871	<	FieldPrecision := 0;
2872	<	FieldNullable := FQSelect.Current[i].IsNullable;
2873	<	case sqltype and not 1 of
2874	<	{ All VARCHAR's must be converted to strings before recording
2875	<	their values }
2876	<	SQL_VARYING, SQL_TEXT:
2877	<	begin
2878	<	FieldSize := sqllen;
2879	<	FieldType := ftString;
2880	<	end;
2881	<	{ All Doubles/Floats should be cast to doubles }
2882	<	SQL_DOUBLE, SQL_FLOAT:
2883	<	FieldType := ftFloat;
2884	<	SQL_SHORT:
2885	<	begin
2886	<	if (sqlscale = 0) then
2887	<	FieldType := ftSmallInt
2888	<	else begin
2889	<	FieldType := ftBCD;
2890	<	FieldPrecision := 4;
2891	<	FieldSize := -sqlscale;
2892	<	end;
2893	<	end;
2894	<	SQL_LONG:
2895	<	begin
2896	<	if (sqlscale = 0) then
2897	<	FieldType := ftInteger
2898	<	else if (sqlscale >= (-4)) then
2899	<	begin
2900	<	FieldType := ftBCD;
2901	<	FieldPrecision := 9;
2902	<	FieldSize := -sqlscale;
2903	<	end
2904	<	else
2905	<	FieldType := ftFloat;
2906	<	end;
2907	<	SQL_INT64:
2908	<	begin
2909	<	if (sqlscale = 0) then
2910	<	FieldType := ftLargeInt
2911	<	else if (sqlscale >= (-4)) then
2912	<	begin
2913	<	FieldType := ftBCD;
2914	<	FieldPrecision := 18;
2915	<	FieldSize := -sqlscale;
2916	<	end
2917	<	else
2918	<	FieldType := ftFloat;
2919	<	end;
2920	<	SQL_TIMESTAMP: FieldType := ftDateTime;
2921	<	SQL_TYPE_TIME: FieldType := ftTime;
2922	<	SQL_TYPE_DATE: FieldType := ftDate;
2923	<	SQL_BLOB:
2924	<	begin
2925	<	FieldSize := sizeof (TISC_QUAD);
2926	<	if (sqlsubtype = 1) then
2927	<	FieldType := ftmemo
2928	<	else
2929	<	FieldType := ftBlob;
2930	<	end;
2931	<	SQL_ARRAY:
2932	<	begin
2933	<	FieldSize := sizeof (TISC_QUAD);
2934	<	FieldType := ftUnknown;
2935	<	end;
2936	<	else
2937	<	FieldType := ftUnknown;
2938	<	end;
2939	<	FieldPosition := i + 1;
2940	<	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
2941	<	begin
2942	<	FMappedFieldPosition[FieldIndex] := FieldPosition;
2943	<	Inc(FieldIndex);
2944	<	with FieldDefs.AddFieldDef do
2945	<	begin
2946	<	Name := string( FieldAliasName );
2947	<	FieldNo := FieldPosition;
2948	<	DataType := FieldType;
2949	<	Size := FieldSize;
2950	<	Precision := FieldPrecision;
2951	<	Required := False;
2952	<	InternalCalcField := False;
2953	<	if (FieldName <> '') and (RelationName <> '') then
2954	<	begin
2955	<	if Has_COMPUTED_BLR(RelationName, FieldName) then
2956	<	begin
2957	<	Attributes := [faReadOnly];
2958	<	InternalCalcField := True;
2959	<	FNeedsRefresh := True;
2960	<	end
2961	<	else
2962	<	begin
2963	<	if Has_DEFAULT_VALUE(RelationName, FieldName) then
2964	<	begin
2965	<	if not FieldNullable then
2966	<	Attributes := [faRequired];
2967	<	end
2968	<	else
2969	<	FNeedsRefresh := True;
2970	<	end;
2971	<	end;
2972	<	end;
2973	<	end;
2974	<	end;
2975	<	finally
2976	<	Query.free;
2977	<	FreeNodes;
2978	<	Database.InternalTransaction.Commit;
2979	<	FieldDefs.EndUpdate;
2980	<	end;
2981	<	end;
2982	<
2983	<	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
2984	<	begin
2985	<	CopyRecordBuffer(FModelBuffer, Buffer);
2986	<	end;
2987	<
2988	<	procedure TIBCustomDataSet.InternalLast;
2989	<	var
2990	<	Buffer: PChar;
2991	<	begin
2992	<	if (FQSelect.EOF) then
2993	<	FCurrentRecord := FRecordCount
2994	<	else begin
2995	<	Buffer := AllocRecordBuffer;
2996	<	try
2997	<	while FQSelect.Next <> nil do
2998	<	begin
2999	<	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3000	<	Inc(FRecordCount);
3001	<	end;
3002	<	FCurrentRecord := FRecordCount;
3003	<	finally
3004	<	FreeRecordBuffer(Buffer);
3005	<	end;
3006	<	end;
3007	<	end;
3008	<
3009	<	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
3010	<	var
3011	<	i: Integer;
3012	<	cur_param: TIBXSQLVAR;
3013	<	cur_field: TField;
3014	<	s: TStream;
3015	<	begin
3016	<	if FQSelect.SQL.Text = '' then
3017	<	IBError(ibxeEmptyQuery, [nil]);
3018	<	if not FInternalPrepared then
3019	<	InternalPrepare;
3020	<	if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
3021	<	begin
3022	<	for i := 0 to SQLParams.Count - 1 do
3023	<	begin
3024	<	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
3025	<	cur_param := SQLParams[i];
3026	<	if (cur_field <> nil) then begin
3027	<	if (cur_field.IsNull) then
3028	<	cur_param.IsNull := True
3029	<	else case cur_field.DataType of
3030	<	ftString:
3031	<	cur_param.AsString := cur_field.AsString;
3032	<	ftBoolean, ftSmallint, ftWord:
3033	<	cur_param.AsShort := cur_field.AsInteger;
3034	<	ftInteger:
3035	<	cur_param.AsLong := cur_field.AsInteger;
3036	<	ftLargeInt:
3037	<	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
3038	<	ftFloat, ftCurrency:
3039	<	cur_param.AsDouble := cur_field.AsFloat;
3040	<	ftBCD:
3041	<	cur_param.AsCurrency := cur_field.AsCurrency;
3042	<	ftDate:
3043	<	cur_param.AsDate := cur_field.AsDateTime;
3044	<	ftTime:
3045	<	cur_param.AsTime := cur_field.AsDateTime;
3046	<	ftDateTime:
3047	<	cur_param.AsDateTime := cur_field.AsDateTime;
3048	<	ftBlob, ftMemo:
3049	<	begin
3050	<	s := nil;
3051	<	try
3052	<	s := DataSource.DataSet.
3053	<	CreateBlobStream(cur_field, bmRead);
3054	<	cur_param.LoadFromStream(s);
3055	<	finally
3056	<	s.free;
3057	<	end;
3058	<	end;
3059	<	else
3060	<	IBError(ibxeNotSupported, [nil]);
3061	<	end;
3062	<	end;
3063	<	end;
3064	<	end;
3065	<	end;
3066	<
3067	<	procedure TIBCustomDataSet.ReQuery;
3068	<	begin
3069	<	FQSelect.Close;
3070	<	ClearBlobCache;
3071	<	FCurrentRecord := -1;
3072	<	FRecordCount := 0;
3073	<	FDeletedRecords := 0;
3074	<	FBPos := 0;
3075	<	FOBPos := 0;
3076	<	FBEnd := 0;
3077	<	FOBEnd := 0;
3078	<	FQSelect.Close;
3079	<	FQSelect.ExecQuery;
3080	<	FOpen := FQSelect.Open;
3081	<	First;
3082	<	end;
3083	<
3084	<	procedure TIBCustomDataSet.InternalOpen;
3085	<	var
3086	<	SetCursor: Boolean;
3087	<
3088	<	function RecordDataLength(n: Integer): Long;
3089	<	begin
3090	<	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
3091	<	end;
3092	<
3093	<	begin
3094	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3095	<	if SetCursor then
3096	<	Screen.Cursor := crHourGlass;
3097	<	try
3098	<	ActivateConnection;
3099	<	ActivateTransaction;
3100	<	if FQSelect.SQL.Text = '' then
3101	<	IBError(ibxeEmptyQuery, [nil]);
3102	<	if not FInternalPrepared then
3103	<	InternalPrepare;
3104	<	if FQSelect.SQLType = SQLSelect then
3105	<	begin
3106	<	if DefaultFields then
3107	<	CreateFields;
3108	<	BindFields(True);
3109	<	FCurrentRecord := -1;
3110	<	FQSelect.ExecQuery;
3111	<	FOpen := FQSelect.Open;
3112	<
3113	<	{ Initialize offsets, buffer sizes, etc...
3114	<	1. Initially FRecordSize is just the "RecordDataLength".
3115	<	2. Allocate a "model" buffer and do a dummy fetch
3116	<	3. After the dummy fetch, FRecordSize will be appropriately
3117	<	adjusted to reflect the additional "weight" of the field
3118	<	data.
3119	<	4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize.
3120	<	5. Now, with the BufferSize available, allocate memory for chunks of records
3121	<	6. Re-allocate the model buffer, accounting for the new
3122	<	FRecordBufferSize.
3123	<	7. Finally, calls to AllocRecordBuffer will work!.
3124	<	}
3125	<	{Step 1}
3126	<	FRecordSize := RecordDataLength(FQSelect.Current.Count);
3127	<	{Step 2, 3}
3128	<	IBAlloc(FModelBuffer, 0, FRecordSize);
3129	<	FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer);
3130	<	{Step 4}
3131	<	FCalcFieldsOffset := FRecordSize;
3132	<	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
3133	<	FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
3134	<	{Step 5}
3135	<	if UniDirectional then
3136	<	FBufferChunkSize := FRecordBufferSize * UniCache
3137	<	else
3138	<	FBufferChunkSize := FRecordBufferSize * BufferChunks;
3139	<	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
3140	<	if FCachedUpdates or (csReading in ComponentState) then
3141	<	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
3142	<	FBPos := 0;
3143	<	FOBPos := 0;
3144	<	FBEnd := 0;
3145	<	FOBEnd := 0;
3146	<	FCacheSize := FBufferChunkSize;
3147	<	FOldCacheSize := FBufferChunkSize;
3148	<	{Step 6}
3149	<	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count),
3150	<	FRecordBufferSize);
3151	<	{Step 7}
3152	<	FOldBuffer := AllocRecordBuffer;
3153	<	end
3154	<	else
3155	<	FQSelect.ExecQuery;
3156	<	finally
3157	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3158	<	Screen.Cursor := crDefault;
3159	<	end;
3160	<	end;
3161	<
3162	<	procedure TIBCustomDataSet.InternalPost;
3163	<	var
3164	<	Qry: TIBSQL;
3165	<	Buff: PChar;
3166	<	SetCursor: Boolean;
3167	<	bInserting: Boolean;
3168	<	begin
3169	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3170	<	if SetCursor then
3171	<	Screen.Cursor := crHourGlass;
3172	<	try
3173	<	Buff := GetActiveBuf;
3174	<	CheckEditState;
3175	<	AdjustRecordOnInsert(Buff);
3176	<	if (State = dsInsert) then
3177	<	begin
3178	<	bInserting := True;
3179	<	Qry := FQInsert;
3180	<	PRecordData(Buff)^.rdUpdateStatus := usInserted;
3181	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3182	<	WriteRecordCache(FRecordCount, Buff);
3183	<	FCurrentRecord := FRecordCount;
3184	<	end
3185	<	else begin
3186	<	bInserting := False;
3187	<	Qry := FQModify;
3188	<	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
3189	<	begin
3190	<	PRecordData(Buff)^.rdUpdateStatus := usModified;
3191	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
3192	<	end
3193	<	else if PRecordData(Buff)^.
3194	<	rdCachedUpdateStatus = cusUninserted then
3195	<	begin
3196	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3197	<	Dec(FDeletedRecords);
3198	<	end;
3199	<	end;
3200	<	if (not CachedUpdates) then
3201	<	InternalPostRecord(Qry, Buff)
3202	<	else begin
3203	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3204	<	FUpdatesPending := True;
3205	<	end;
3206	<	if bInserting then
3207	<	Inc(FRecordCount);
3208	<	finally
3209	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3210	<	Screen.Cursor := crDefault;
3211	<	end;
3212	<	end;
3213	<
3214	<	procedure TIBCustomDataSet.InternalRefresh;
3215	<	begin
3216	<	inherited;
3217	<	InternalRefreshRow;
3218	<	end;
3219	<
3220	<	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
3221	<	begin
3222	<	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
3223	<	end;
3224	<
3225	<	function TIBCustomDataSet.IsCursorOpen: Boolean;
3226	<	begin
3227	<	result := FOpen;
3228	<	end;
3229	<
3230	<	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
3231	<	Options: TLocateOptions): Boolean;
3232	<	var
3233	<	CurBookmark: string;
3234	<	begin
3235	<	DisableControls;
3236	<	try
3237	<	CurBookmark := Bookmark;
3238	<	First;
3239	<	result := InternalLocate(KeyFields, KeyValues, Options);
3240	<	if not result then
3241	<	Bookmark := CurBookmark;
3242	<	finally
3243	<	EnableControls;
3244	<	end;
3245	<	end;
3246	<
3247	<	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
3248	<	const ResultFields: string): Variant;
3249	<	var
3250	<	fl: TList;
3251	<	CurBookmark: string;
3252	<	begin
3253	<	DisableControls;
3254	<	fl := TList.Create;
3255	<	CurBookmark := Bookmark;
3256	<	try
3257	<	First;
3258	<	if InternalLocate(KeyFields, KeyValues, []) then
3259	<	begin
3260	<	if (ResultFields <> '') then
3261	<	result := FieldValues[ResultFields]
3262	<	else
3263	<	result := NULL;
3264	<	end
3265	<	else
3266	<	result := Null;
3267	<	finally
3268	<	Bookmark := CurBookmark;
3269	<	fl.Free;
3270	<	EnableControls;
3271	<	end;
3272	<	end;
3273	<
3274	<	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
3275	<	begin
3276	<	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
3277	<	end;
3278	<
3279	<	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
3280	<	begin
3281	<	PRecordData(Buffer)^.rdBookmarkFlag := Value;
3282	<	end;
3283	<
3284	<	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
3285	<	begin
3286	<	if not Value and FCachedUpdates then
3287	<	CancelUpdates;
3288	<	if (not (csReading in ComponentState)) and Value then
3289	<	CheckDatasetClosed;
3290	<	FCachedUpdates := Value;
3291	<	end;
3292	<
3293	<	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
3294	<	begin
3295	<	if IsLinkedTo(Value) then
3296	<	IBError(ibxeCircularReference, [nil]);
3297	<	if FDataLink <> nil then
3298	<	FDataLink.DataSource := Value;
3299	<	end;
3300	<
3301	<	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
3302	<	var
3303	<	Buff, TmpBuff: PChar;
3304	<	begin
3305	<	Buff := GetActiveBuf;
3306	<	if Field.FieldNo < 0 then
3307	<	begin
3308	<	TmpBuff := Buff + FRecordSize + Field.Offset;
3309	<	Boolean(TmpBuff[0]) := LongBool(Buffer);
3310	<	if Boolean(TmpBuff[0]) then
3311	<	Move(Buffer^, TmpBuff[1], Field.DataSize);
3312	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3313	<	end
3314	<	else begin
3315	<	CheckEditState;
3316	<	with PRecordData(Buff)^ do
3317	<	begin
3318	<	{ If inserting, Adjust record position }
3319	<	AdjustRecordOnInsert(Buff);
3320	<	if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
3321	<	(FMappedFieldPosition[Field.FieldNo - 1] <= rdFieldCount) then
3322	<	begin
3323	<	Field.Validate(Buffer);
3324	<	if (Buffer = nil) or
3325	<	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
3326	<	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull := True
3327	<	else begin
3328	<	Move(Buffer^, Buff[rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs],
3329	<	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataSize);
3330	<	if (rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataType = SQL_TEXT) or
3331	<	(rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataType = SQL_VARYING) then
3332	<	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataLength := StrLen(PChar(Buffer));
3333	<	rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull := False;
3334	<	if rdUpdateStatus = usUnmodified then
3335	<	begin
3336	<	if CachedUpdates then
3337	<	begin
3338	<	FUpdatesPending := True;
3339	<	if State = dsInsert then
3340	<	rdCachedUpdateStatus := cusInserted
3341	<	else if State = dsEdit then
3342	<	rdCachedUpdateStatus := cusModified;
3343	<	end;
3344	<
3345	<	if State = dsInsert then
3346	<	rdUpdateStatus := usInserted
3347	<	else
3348	<	rdUpdateStatus := usModified;
3349	<	end;
3350	<	WriteRecordCache(rdRecordNumber, Buff);
3351	<	SetModified(True);
3352	<	end;
3353	<	end;
3354	<	end;
3355	<	end;
3356	<	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
3357	<	DataEvent(deFieldChange, Longint(Field));
3358	<	end;
3359	<
3360	<	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
3361	<	begin
3362	<	CheckBrowseMode;
3363	<	if (Value < 1) then
3364	<	Value := 1
3365	<	else if Value > FRecordCount then
3366	<	begin
3367	<	InternalLast;
3368	<	Value := Min(FRecordCount, Value);
3369	<	end;
3370	<	if (Value <> RecNo) then
3371	<	begin
3372	<	DoBeforeScroll;
3373	<	FCurrentRecord := Value - 1;
3374	<	Resync([]);
3375	<	DoAfterScroll;
3376	<	end;
3377	<	end;
3378	<
3379	<	procedure TIBCustomDataSet.Disconnect;
3380	<	begin
3381	<	Close;
3382	<	InternalUnPrepare;
3383	<	end;
3384	<
3385	<	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
3386	<	begin
3387	<	if not CanModify then
3388	<	IBError(ibxeCannotUpdate, [nil])
3389	<	else
3390	<	FUpdateMode := Value;
3391	<	end;
3392	<
3393	<
3394	<	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
3395	<	begin
3396	<	if Value <> FUpdateObject then
3397	<	begin
3398	<	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
3399	<	FUpdateObject.DataSet := nil;
3400	<	FUpdateObject := Value;
3401	<	if Assigned(FUpdateObject) then
3402	<	begin
3403	<	if Assigned(FUpdateObject.DataSet) and
3404	<	(FUpdateObject.DataSet <> Self) then
3405	<	FUpdateObject.DataSet.UpdateObject := nil;
3406	<	FUpdateObject.DataSet := Self;
3407	<	end;
3408	<	end;
3409	<	end;
3410	<
3411	<	function TIBCustomDataSet.ConstraintsStored: Boolean;
3412	<	begin
3413	<	Result := Constraints.Count > 0;
3414	<	end;
3415	<
3416	<	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
3417	<	begin
3418	<	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
3419	<	end;
3420	<
3421	<
3422	<	procedure TIBCustomDataSet.InternalUnPrepare;
3423	<	begin
3424	<	if FInternalPrepared then
3425	<	begin
3426	<	CheckDatasetClosed;
3427	<	FieldDefs.Clear;
3428	<	FInternalPrepared := False;
3429	<	end;
3430	<	end;
3431	<
3432	<	procedure TIBCustomDataSet.InternalExecQuery;
3433	<	var
3434	<	DidActivate: Boolean;
3435	<	SetCursor: Boolean;
3436	<	begin
3437	<	DidActivate := False;
3438	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3439	<	if SetCursor then
3440	<	Screen.Cursor := crHourGlass;
3441	<	try
3442	<	ActivateConnection;
3443	<	DidActivate := ActivateTransaction;
3444	<	if FQSelect.SQL.Text = '' then
3445	<	IBError(ibxeEmptyQuery, [nil]);
3446	<	if not FInternalPrepared then
3447	<	InternalPrepare;
3448	<	if FQSelect.SQLType = SQLSelect then
3449	<	begin
3450	<	IBError(ibxeIsASelectStatement, [nil]);
3451	<	end
3452	<	else
3453	<	FQSelect.ExecQuery;
3454	<	finally
3455	<	if DidActivate then
3456	<	DeactivateTransaction;
3457	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3458	<	Screen.Cursor := crDefault;
3459	<	end;
3460	<	end;
3461	<
3462	<	function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE;
3463	<	begin
3464	<	Result := FQSelect.Handle;
3465	<	end;
3466	<
3467	<	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
3468	<	begin
3469	<	inherited InitRecord(Buffer);
3470	<	with PRecordData(Buffer)^ do
3471	<	begin
3472	<	rdUpdateStatus := TUpdateStatus(usInserted);
3473	<	rdBookMarkFlag := bfInserted;
3474	<	rdRecordNumber := -1;
3475	<	end;
3476	<	end;
3477	<
3478	<	procedure TIBCustomDataSet.InternalInsert;
3479	<	begin
3480	<	CursorPosChanged;
3481	<	end;
3482	<
3483	<	{ TIBDataSet IProviderSupport }
3484	<
3485	<	procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
3486	<	begin
3487	<	if Commit then
3488	<	Transaction.Commit else
3489	<	Transaction.Rollback;
3490	<	end;
3491	<
3492	<	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
3493	<	ResultSet: Pointer = nil): Integer;
3494	<	var
3495	<	FQuery: TIBQuery;
3496	<	begin
3497	<	if Assigned(ResultSet) then
3498	<	begin
3499	<	TDataSet(ResultSet^) := TIBQuery.Create(nil);
3500	<	with TIBQuery(ResultSet^) do
3501	<	begin
3502	<	SQL.Text := ASQL;
3503	<	Params.Assign(AParams);
3504	<	Open;
3505	<	Result := RowsAffected;
3506	<	end;
3507	<	end
3508	<	else
3509	<	begin
3510	<	FQuery := TIBQuery.Create(nil);
3511	<	try
3512	<	FQuery.Database := Database;
3513	<	FQuery.Transaction := Transaction;
3514	<	FQuery.GenerateParamNames := True;
3515	<	FQuery.SQL.Text := ASQL;
3516	<	FQuery.Params.Assign(AParams);
3517	<	FQuery.ExecSQL;
3518	<	Result := FQuery.RowsAffected;
3519	<	finally
3520	<	FQuery.Free;
3521	<	end;
3522	<	end;
3523	<	end;
3524	<
3525	<	function TIBCustomDataSet.PSGetQuoteChar: string;
3526	<	begin
3527	<	if Database.SQLDialect = 3 then
3528	<	Result := '"' else
3529	<	Result := '';
3530	<	end;
3531	<
3532	<	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
3533	<	var
3534	<	PrevErr: Integer;
3535	<	begin
3536	<	if Prev <> nil then
3537	<	PrevErr := Prev.ErrorCode else
3538	<	PrevErr := 0;
3539	<	if E is EIBError then
3540	<	with EIBError(E) do
3541	<	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
3542	<	Result := inherited PSGetUpdateException(E, Prev);
3543	<	end;
3544	<
3545	<	function TIBCustomDataSet.PSInTransaction: Boolean;
3546	<	begin
3547	<	Result := Transaction.InTransaction;
3548	<	end;
3549	<
3550	<	function TIBCustomDataSet.PSIsSQLBased: Boolean;
3551	<	begin
3552	<	Result := True;
3553	<	end;
3554	<
3555	<	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
3556	<	begin
3557	<	Result := True;
3558	<	end;
3559	<
3560	<	procedure TIBCustomDataSet.PSReset;
3561	<	begin
3562	<	inherited PSReset;
3563	<	if Active then
3564	<	begin
3565	<	Close;
3566	<	Open;
3567	<	end;
3568	<	end;
3569	<
3570	<	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
3571	<	var
3572	<	UpdateAction: TIBUpdateAction;
3573	<	SQL: string;
3574	<	Params: TParams;
3575	<
3576	<	procedure AssignParams(DataSet: TDataSet; Params: TParams);
3577	<	var
3578	<	I: Integer;
3579	<	Old: Boolean;
3580	<	Param: TParam;
3581	<	PName: string;
3582	<	Field: TField;
3583	<	Value: Variant;
3584	<	begin
3585	<	for I := 0 to Params.Count - 1 do
3586	<	begin
3587	<	Param := Params[I];
3588	<	PName := Param.Name;
3589	<	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
3590	<	if Old then System.Delete(PName, 1, 4);
3591	<	Field := DataSet.FindField(PName);
3592	<	if not Assigned(Field) then Continue;
3593	<	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
3594	<	begin
3595	<	Value := Field.NewValue;
3596	<	if VarIsEmpty(Value) then Value := Field.OldValue;
3597	<	Param.AssignFieldValue(Field, Value);
3598	<	end;
3599	<	end;
3600	<	end;
3601	<
3602	<	begin
3603	<	Result := False;
3604	<	if Assigned(OnUpdateRecord) then
3605	<	begin
3606	<	UpdateAction := uaFail;
3607	<	if Assigned(FOnUpdateRecord) then
3608	<	begin
3609	<	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
3610	<	Result := UpdateAction = uaApplied;
3611	<	end;
3612	<	end
3613	<	else if Assigned(FUpdateObject) then
3614	<	begin
3615	<	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
3616	<	if SQL <> '' then
3617	<	begin
3618	<	Params := TParams.Create;
3619	<	try
3620	<	Params.ParseSQL(SQL, True);
3621	<	AssignParams(Delta, Params);
3622	<	if PSExecuteStatement(SQL, Params) = 0 then
3623	<	IBError(ibxeNoRecordsAffected, [nil]);
3624	<	Result := True;
3625	<	finally
3626	<	Params.Free;
3627	<	end;
3628	<	end;
3629	<	end;
3630	<	end;
3631	<
3632	<	procedure TIBCustomDataSet.PSStartTransaction;
3633	<	begin
3634	<	ActivateConnection;
3635	<	Transaction.StartTransaction;
3636	<	end;
3637	<
3638	<	function TIBCustomDataSet.PSGetTableName: string;
3639	<	begin
3640	<	//  if not FInternalPrepared then
3641	<	//    InternalPrepare;
3642	<	{ It is possible for the FQSelectSQL to be unprepared
3643	<	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
3644	<	So check the Prepared of the SelectSQL instead }
3645	<	if not FQSelect.Prepared then
3646	<	FQSelect.Prepare;
3647	<	Result := FQSelect.UniqueRelationName;
3648	<	end;
3649	<
3650	<	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
3651	<	begin
3652	<	InternalBatchInput(InputObject);
3653	<	end;
3654	<
3655	<	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
3656	<	begin
3657	<	InternalBatchOutput(OutputObject);
3658	<	end;
3659	<
3660	<	procedure TIBDataSet.ExecSQL;
3661	<	begin
3662	<	InternalExecQuery;
3663	<	end;
3664	<
3665	<	procedure TIBDataSet.Prepare;
3666	<	begin
3667	<	InternalPrepare;
3668	<	end;
3669	<
3670	<	procedure TIBDataSet.UnPrepare;
3671	<	begin
3672	<	InternalUnPrepare;
3673	<	end;
3674	<
3675	<	function TIBDataSet.GetPrepared: Boolean;
3676	<	begin
3677	<	Result := InternalPrepared;
3678	<	end;
3679	<
3680	<	procedure TIBDataSet.InternalOpen;
3681	<	begin
3682	<	ActivateConnection;
3683	<	ActivateTransaction;
3684	<	InternalSetParamsFromCursor;
3685	<	Inherited;
3686	<	end;
3687	<
3688	<	procedure TIBDataSet.SetFiltered(Value: Boolean);
3689	<	begin
3690	<	if(Filtered <> Value) then
3691	<	begin
3692	<	inherited SetFiltered(value);
3693	<	if Active then
3694	<	begin
3695	<	Close;
3696	<	Open;
3697	<	end;
3698	<	end
3699	<	else
3700	<	inherited SetFiltered(value);
3701	<	end;
3702	<
3703	<	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
3704	<	begin
3705	<	Result := false;
3706	<	if not Assigned(Bookmark) then
3707	<	exit;
3708	<	Result := PInteger(Bookmark)^ < FRecordCount;
3709	<	end;
3710	<
3711	<	function TIBCustomDataSet.GetFieldData(Field: TField;
3712	<	Buffer: Pointer): Boolean;
3713	<	var
3714	<	lTempCurr : System.Currency;
3715	<	begin
3716	<	if (Field.DataType = ftBCD) and (Buffer <> nil) then
3717	<	begin
3718	<	Result := InternalGetFieldData(Field, @lTempCurr);
3719	<	if Result then
3720	<	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
3721	<	end
3722	<	else
3723	<	Result := InternalGetFieldData(Field, Buffer);
3724	<	end;
3725	<
3726	<	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
3727	<	NativeFormat: Boolean): Boolean;
3728	<	begin
3729	<	if (Field.DataType = ftBCD) and not NativeFormat then
3730	<	Result := InternalGetFieldData(Field, Buffer)
3731	<	else
3732	<	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
3733	<	end;
3734	<
3735	<	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
3736	<	var
3737	<	lTempCurr : System.Currency;
3738	<	begin
3739	<	if Field.DataType = ftBCD then
3740	<	begin
3741	<	BCDToCurr(TBCD(Buffer^), lTempCurr);
3742	<	InternalSetFieldData(Field, @lTempCurr);
3743	<	end
3744	<	else
3745	<	InternalSetFieldData(Field, Buffer);
3746	<	end;
3747	<
3748	<	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
3749	<	NativeFormat: Boolean);
3750	<	begin
3751	<	if (not NativeFormat) and (Field.DataType = ftBCD) then
3752	<	InternalSetfieldData(Field, Buffer)
3753	<	else
3754	<	inherited SetFieldData(Field, buffer, NativeFormat);
3755	<	end;
3756	<
3757	<	{ TIBDataSetUpdateObject }
3758	<
3759	<	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
3760	<	begin
3761	<	inherited Create(AOwner);
3762	<	FRefreshSQL := TStringList.Create;
3763	<	end;
3764	<
3765	<	destructor TIBDataSetUpdateObject.Destroy;
3766	<	begin
3767	<	FRefreshSQL.Free;
3768	<	inherited destroy;
3769	<	end;
3770	<
3771	<	procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings);
3772	<	begin
3773	<	FRefreshSQL.Assign(Value);
3774	<	end;
3775	<
3776	<	{ TIBDSBlobStream }
3777	<	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
3778	<	Mode: TBlobStreamMode);
3779	<	begin
3780	<	FField := AField;
3781	<	FBlobStream := ABlobStream;
3782	<	FBlobStream.Seek(0, soFromBeginning);
3783	<	if (Mode = bmWrite) then
3784	<	FBlobStream.Truncate;
3785	<	end;
3786	<
3787	<	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
3788	<	begin
3789	<	result := FBlobStream.Read(Buffer, Count);
3790	<	end;
3791	<
3792	<	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
3793	<	begin
3794	<	result := FBlobStream.Seek(Offset, Origin);
3795	<	end;
3796	<
3797	<	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
3798	<	begin
3799	<	FBlobStream.SetSize(NewSize);
3800	<	end;
3801	<
3802	<	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
3803	<	begin
3804	<	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
3805	<	IBError(ibxeNotEditing, [nil]);
3806	<	TIBCustomDataSet(FField.DataSet).RecordModified(True);
3807	<	result := FBlobStream.Write(Buffer, Count);
3808	<	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, Longint(FField));
3809	<	end;
3810	<
3811	<	end.
1	>	{************************************************************************}
2	>	{                                                                        }
3	>	{       Borland Delphi Visual Component Library                          }
4	>	{       InterBase Express core components                                }
5	>	{                                                                        }
6	>	{       Copyright (c) 1998-2000 Inprise Corporation                      }
7	>	{                                                                        }
8	>	{    InterBase Express is based in part on the product                   }
9	>	{    Free IB Components, written by Gregory H. Deatz for                 }
10	>	{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
11	>	{    Free IB Components is used under license.                           }
12	>	{                                                                        }
13	>	{    The contents of this file are subject to the InterBase              }
14	>	{    Public License Version 1.0 (the "License"); you may not             }
15	>	{    use this file except in compliance with the License. You            }
16	>	{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	>	{    Software distributed under the License is distributed on            }
18	>	{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
19	>	{    express or implied. See the License for the specific language       }
20	>	{    governing rights and limitations under the License.                 }
21	>	{    The Original Code was created by InterBase Software Corporation     }
22	>	{       and its successors.                                              }
23	>	{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
24	>	{       Corporation. All Rights Reserved.                                }
25	>	{    Contributor(s): Jeff Overcash                                       }
26	>	{                                                                        }
27	>	{    IBX For Lazarus (Firebird Express)                                  }
28	>	{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	>	{    Portions created by MWA Software are copyright McCallum Whyman      }
30	>	{    Associates Ltd 2011 - 2015                                                }
31	>	{                                                                        }
32	>	{************************************************************************}
33	>
34	>	unit IBCustomDataSet;
35	>
36	>	{$R-}
37	>
38	>	{$Mode Delphi}
39	>
40	>	{$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, IBDatabase, IBExternals, IB, IBHeader,  IBSQL, Db,
53	>	IBUtils, IBBlob, IBSQLParser;
54	>
55	>	const
56	>	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
57	>	UniCache           =  2;     { Uni-directional cache is 2 records big }
58	>
59	>	type
60	>	TIBCustomDataSet = class;
61	>	TIBDataSet = class;
62	>
63	>	{ TIBDataSetUpdateObject }
64	>
65	>	TIBDataSetUpdateObject = class(TComponent)
66	>	private
67	>	FRefreshSQL: TStrings;
68	>	procedure SetRefreshSQL(value: TStrings);
69	>	protected
70	>	function GetDataSet: TIBCustomDataSet; virtual; abstract;
71	>	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
72	>	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
73	>	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
74	>	procedure InternalSetParams(Query: TIBSQL; buff: PChar);
75	>	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
76	>	public
77	>	constructor Create(AOwner: TComponent); override;
78	>	destructor Destroy; override;
79	>	published
80	>	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
81	>	end;
82	>
83	>	TBlobDataArray = array[0..0] of TIBBlobStream;
84	>	PBlobDataArray = ^TBlobDataArray;
85	>
86	>	{ TIBCustomDataSet }
87	>	TFieldData = record
88	>	fdDataType: Short;
89	>	fdDataScale: Short;
90	>	fdNullable: Boolean;
91	>	fdIsNull: Boolean;
92	>	fdDataSize: Short;
93	>	fdDataLength: Short;
94	>	fdDataOfs: Integer;
95	>	end;
96	>	PFieldData = ^TFieldData;
97	>
98	>	TCachedUpdateStatus = (
99	>	cusUnmodified, cusModified, cusInserted,
100	>	cusDeleted, cusUninserted
101	>	);
102	>	TIBDBKey = record
103	>	DBKey: array[0..7] of Byte;
104	>	end;
105	>	PIBDBKey = ^TIBDBKey;
106	>
107	>	TRecordData = record
108	>	rdBookmarkFlag: TBookmarkFlag;
109	>	rdFieldCount: Short;
110	>	rdRecordNumber: Integer;
111	>	rdCachedUpdateStatus: TCachedUpdateStatus;
112	>	rdUpdateStatus: TUpdateStatus;
113	>	rdSavedOffset: DWORD;
114	>	rdDBKey: TIBDBKey;
115	>	rdFields: array[1..1] of TFieldData;
116	>	end;
117	>	PRecordData = ^TRecordData;
118	>
119	>	{ TIBStringField allows us to have strings longer than 8196 }
120	>
121	>	TIBStringField = class(TStringField)
122	>	private
123	>	FInitialised: boolean;
124	>	protected
125	>	procedure SetSize(AValue: Integer); override;
126	>	public
127	>	constructor create(AOwner: TComponent); override;
128	>	class procedure CheckTypeSize(Value: Integer); override;
129	>	function GetAsString: string; override;
130	>	function GetAsVariant: Variant; override;
131	>	function GetValue(var Value: string): Boolean;
132	>	procedure SetAsString(const Value: string); override;
133	>	end;
134	>
135	>	{ TIBBCDField }
136	>	{  Actually, there is no BCD involved in this type,
137	>	instead it deals with currency types.
138	>	In IB, this is an encapsulation of Numeric (x, y)
139	>	where x < 18 and y <= 4.
140	>	Note: y > 4 will default to Floats
141	>	}
142	>	TIBBCDField = class(TBCDField)
143	>	protected
144	>	class procedure CheckTypeSize(Value: Integer); override;
145	>	function GetAsCurrency: Currency; override;
146	>	function GetAsString: string; override;
147	>	function GetAsVariant: Variant; override;
148	>	function GetDataSize: Integer; override;
149	>	public
150	>	constructor Create(AOwner: TComponent); override;
151	>	published
152	>	property Size default 8;
153	>	end;
154	>
155	>	TIBDataLink = class(TDetailDataLink)
156	>	private
157	>	FDataSet: TIBCustomDataSet;
158	>	protected
159	>	procedure ActiveChanged; override;
160	>	procedure RecordChanged(Field: TField); override;
161	>	function GetDetailDataSet: TDataSet; override;
162	>	procedure CheckBrowseMode; override;
163	>	public
164	>	constructor Create(ADataSet: TIBCustomDataSet);
165	>	destructor Destroy; override;
166	>	end;
167	>
168	>	TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord);
169	>
170	>	{ TIBGenerator }
171	>
172	>	TIBGenerator = class(TPersistent)
173	>	private
174	>	FOwner: TIBCustomDataSet;
175	>	FApplyOnEvent: TIBGeneratorApplyOnEvent;
176	>	FFieldName: string;
177	>	FGeneratorName: string;
178	>	FIncrement: integer;
179	>	procedure SetIncrement(const AValue: integer);
180	>	protected
181	>	function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer;
182	>	public
183	>	constructor Create(Owner: TIBCustomDataSet);
184	>	procedure Apply;
185	>	property Owner: TIBCustomDataSet read FOwner;
186	>	published
187	>	property Generator: string read FGeneratorName write FGeneratorName;
188	>	property Field: string read FFieldName write FFieldName;
189	>	property Increment: integer read FIncrement write SetIncrement default 1;
190	>	property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
191	>	end;
192	>
193	>	{TIBControlLink - Allows IB Aware controls to react to dataset state changes}
194	>
195	>	TIBControlLink = class
196	>	private
197	>	FTIBDataSet: TIBCustomDataSet;
198	>	procedure SetIBDataSet(AValue: TIBCustomDataSet);
199	>	protected
200	>	procedure UpdateSQL(Sender: TObject); virtual;
201	>	procedure UpdateParams(Sender: TObject); virtual;
202	>	public
203	>	destructor Destroy; override;
204	>	property IBDataSet: TIBCustomDataSet read FTIBDataSet write SetIBDataSet;
205	>	end;
206	>
207	>	TIBAutoCommit = (acDisabled, acCommitRetaining);
208	>
209	>	{ TIBCustomDataSet }
210	>	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
211	>
212	>	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
213	>	UpdateKind: TUpdateKind; var TheUpdateAction: TIBUpdateAction)
214	>	of object;
215	>	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
216	>	var UpdateAction: TIBUpdateAction) of object;
217	>
218	>	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
219	>
220	>	TDataSetCloseAction = (dcDiscardChanges, dcSaveChanges);
221	>
222	>	TOnValidatePost = procedure (Sender: TObject; var CancelPost: boolean) of object;
223	>
224	>	TIBCustomDataSet = class(TDataset)
225	>	private
226	>	FAutoCommit: TIBAutoCommit;
227	>	FGenerateParamNames: Boolean;
228	>	FGeneratorField: TIBGenerator;
229	>	FNeedsRefresh: Boolean;
230	>	FForcedRefresh: Boolean;
231	>	FDidActivate: Boolean;
232	>	FIBLoaded: Boolean;
233	>	FBase: TIBBase;
234	>	FBlobCacheOffset: Integer;
235	>	FBlobStreamList: TList;
236	>	FBufferChunks: Integer;
237	>	FBufferCache,
238	>	FOldBufferCache: PChar;
239	>	FBufferChunkSize,
240	>	FCacheSize,
241	>	FOldCacheSize: Integer;
242	>	FFilterBuffer: PChar;
243	>	FBPos,
244	>	FOBPos,
245	>	FBEnd,
246	>	FOBEnd: DWord;
247	>	FCachedUpdates: Boolean;
248	>	FCalcFieldsOffset: Integer;
249	>	FCurrentRecord: Long;
250	>	FDeletedRecords: Long;
251	>	FModelBuffer,
252	>	FOldBuffer: PChar;
253	>	FOnValidatePost: TOnValidatePost;
254	>	FOpen: Boolean;
255	>	FInternalPrepared: Boolean;
256	>	FQDelete,
257	>	FQInsert,
258	>	FQRefresh,
259	>	FQSelect,
260	>	FQModify: TIBSQL;
261	>	FRecordBufferSize: Integer;
262	>	FRecordCount: Integer;
263	>	FRecordSize: Integer;
264	>	FDataSetCloseAction: TDataSetCloseAction;
265	>	FUniDirectional: Boolean;
266	>	FUpdateMode: TUpdateMode;
267	>	FUpdateObject: TIBDataSetUpdateObject;
268	>	FParamCheck: Boolean;
269	>	FUpdatesPending: Boolean;
270	>	FUpdateRecordTypes: TIBUpdateRecordTypes;
271	>	FMappedFieldPosition: array of Integer;
272	>	FDataLink: TIBDataLink;
273	>
274	>	FBeforeDatabaseDisconnect,
275	>	FAfterDatabaseDisconnect,
276	>	FDatabaseFree: TNotifyEvent;
277	>	FOnUpdateError: TIBUpdateErrorEvent;
278	>	FOnUpdateRecord: TIBUpdateRecordEvent;
279	>	FBeforeTransactionEnd,
280	>	FAfterTransactionEnd,
281	>	FTransactionFree: TNotifyEvent;
282	>	FAliasNameMap: array of string;
283	>	FAliasNameList: array of string;
284	>	FBaseSQLSelect: TStrings;
285	>	FParser: TSelectSQLParser;
286	>	FCloseAction: TTransactionAction;
287	>	FInTransactionEnd: boolean;
288	>	FIBLinks: TList;
289	>	function GetSelectStmtHandle: TISC_STMT_HANDLE;
290	>	procedure SetUpdateMode(const Value: TUpdateMode);
291	>	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
292	>
293	>	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
294	>	procedure AdjustRecordOnInsert(Buffer: Pointer);
295	>	function CanEdit: Boolean;
296	>	function CanInsert: Boolean;
297	>	function CanDelete: Boolean;
298	>	function CanRefresh: Boolean;
299	>	procedure CheckEditState;
300	>	procedure ClearBlobCache;
301	>	procedure ClearIBLinks;
302	>	procedure CopyRecordBuffer(Source, Dest: Pointer);
303	>	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
304	>	procedure DoAfterDatabaseDisconnect(Sender: TObject);
305	>	procedure DoDatabaseFree(Sender: TObject);
306	>	procedure DoBeforeTransactionEnd(Sender: TObject; Action: TTransactionAction);
307	>	procedure DoAfterTransactionEnd(Sender: TObject);
308	>	procedure DoTransactionFree(Sender: TObject);
309	>	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
310	>	Buffer: PChar);
311	>	function GetDatabase: TIBDatabase;
312	>	function GetDBHandle: PISC_DB_HANDLE;
313	>	function GetDeleteSQL: TStrings;
314	>	function GetInsertSQL: TStrings;
315	>	function GetSQLParams: TIBXSQLDA;
316	>	function GetRefreshSQL: TStrings;
317	>	function GetSelectSQL: TStrings;
318	>	function GetStatementType: TIBSQLTypes;
319	>	function GetModifySQL: TStrings;
320	>	function GetTransaction: TIBTransaction;
321	>	function GetTRHandle: PISC_TR_HANDLE;
322	>	function GetParser: TSelectSQLParser;
323	>	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
324	>	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
325	>	Options: TLocateOptions): Boolean; virtual;
326	>	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
327	>	procedure InternalRevertRecord(RecordNumber: Integer); virtual;
328	>	function IsVisible(Buffer: PChar): Boolean;
329	>	procedure RegisterIBLink(Sender: TIBControlLink);
330	>	procedure UnRegisterIBLink(Sender: TIBControlLink);
331	>	procedure SaveOldBuffer(Buffer: PChar);
332	>	procedure SetBufferChunks(Value: Integer);
333	>	procedure SetDatabase(Value: TIBDatabase);
334	>	procedure SetDeleteSQL(Value: TStrings);
335	>	procedure SetInsertSQL(Value: TStrings);
336	>	procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
337	>	procedure SetRefreshSQL(Value: TStrings);
338	>	procedure SetSelectSQL(Value: TStrings);
339	>	procedure SetModifySQL(Value: TStrings);
340	>	procedure SetTransaction(Value: TIBTransaction);
341	>	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
342	>	procedure SetUniDirectional(Value: Boolean);
343	>	procedure RefreshParams;
344	>	procedure SQLChanging(Sender: TObject); virtual;
345	>	function AdjustPosition(FCache: PChar; Offset: DWORD;
346	>	Origin: Integer): DWORD;
347	>	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
348	>	Buffer: PChar);
349	>	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
350	>	ReadOldBuffer: Boolean);
351	>	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
352	>	Buffer: PChar);
353	>	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
354	>	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
355	>	DoCheck: Boolean): TGetResult; virtual;
356	>
357	>	protected
358	>	procedure ActivateConnection;
359	>	function ActivateTransaction: Boolean;
360	>	procedure DeactivateTransaction;
361	>	procedure CheckDatasetClosed;
362	>	procedure CheckDatasetOpen;
363	>	function CreateParser: TSelectSQLParser; virtual;
364	>	procedure FieldDefsFromQuery(SourceQuery: TIBSQL);
365	>	function GetActiveBuf: PChar;
366	>	procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
367	>	procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
368	>	procedure InternalPrepare; virtual;
369	>	procedure InternalUnPrepare; virtual;
370	>	procedure InternalExecQuery; virtual;
371	>	procedure InternalRefreshRow; virtual;
372	>	procedure InternalSetParamsFromCursor; virtual;
373	>	procedure CheckNotUniDirectional;
374	>
375	>	(*    { IProviderSupport }
376	>	procedure PSEndTransaction(Commit: Boolean); override;
377	>	function PSExecuteStatement(const ASQL: string; AParams: TParams;
378	>	ResultSet: Pointer = nil): Integer; override;
379	>	function PsGetTableName: string; override;
380	>	function PSGetQuoteChar: string; override;
381	>	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
382	>	function PSInTransaction: Boolean; override;
383	>	function PSIsSQLBased: Boolean; override;
384	>	function PSIsSQLSupported: Boolean; override;
385	>	procedure PSStartTransaction; override;
386	>	procedure PSReset; override;
387	>	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
388	>	*)
389	>	{ TDataSet support }
390	>	procedure InternalInsert; override;
391	>	procedure InitRecord(Buffer: PChar); override;
392	>	procedure Disconnect; virtual;
393	>	function ConstraintsStored: Boolean;
394	>	procedure ClearCalcFields(Buffer: PChar); override;
395	>	function AllocRecordBuffer: PChar; override;
396	>	procedure DoBeforeDelete; override;
397	>	procedure DoAfterDelete; override;
398	>	procedure DoBeforeEdit; override;
399	>	procedure DoAfterEdit; override;
400	>	procedure DoBeforeInsert; override;
401	>	procedure DoAfterInsert; override;
402	>	procedure DoBeforeClose; override;
403	>	procedure DoBeforeOpen; override;
404	>	procedure DoBeforePost; override;
405	>	procedure DoAfterPost; override;
406	>	procedure FreeRecordBuffer(var Buffer: PChar); override;
407	>	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
408	>	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
409	>	function GetCanModify: Boolean; override;
410	>	function GetDataSource: TDataSource; override;
411	>	function GetDBAliasName(FieldNo: integer): string;
412	>	function GetFieldDefFromAlias(aliasName: string): TFieldDef;
413	>	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
414	>	function GetRecNo: Integer; override;
415	>	function GetRecord(Buffer: PChar; GetMode: TGetMode;
416	>	DoCheck: Boolean): TGetResult; override;
417	>	function GetRecordCount: Integer; override;
418	>	function GetRecordSize: Word; override;
419	>	procedure InternalAutoCommit;
420	>	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
421	>	procedure InternalCancel; override;
422	>	procedure InternalClose; override;
423	>	procedure InternalDelete; override;
424	>	procedure InternalFirst; override;
425	>	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
426	>	procedure InternalGotoBookmark(Bookmark: Pointer); override;
427	>	procedure InternalHandleException; override;
428	>	procedure InternalInitFieldDefs; override;
429	>	procedure InternalInitRecord(Buffer: PChar); override;
430	>	procedure InternalLast; override;
431	>	procedure InternalOpen; override;
432	>	procedure InternalPost; override;
433	>	procedure InternalRefresh; override;
434	>	procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
435	>	procedure InternalSetToRecord(Buffer: PChar); override;
436	>	function IsCursorOpen: Boolean; override;
437	>	procedure Loaded; override;
438	>	procedure ReQuery;
439	>	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
440	>	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
441	>	procedure SetCachedUpdates(Value: Boolean);
442	>	procedure SetDataSource(Value: TDataSource);
443	>	procedure SetGenerateParamNames(AValue: Boolean); virtual;
444	>	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
445	>	procedure SetFieldData(Field : TField; Buffer : Pointer;
446	>	NativeFormat : Boolean); overload; override;
447	>	procedure SetRecNo(Value: Integer); override;
448	>
449	>	protected
450	>	{Likely to be made public by descendant classes}
451	>	property AutoCommit: TIBAutoCommit read FAutoCommit write FAutoCommit default acDisabled;
452	>	property SQLParams: TIBXSQLDA read GetSQLParams;
453	>	property Params: TIBXSQLDA read GetSQLParams;
454	>	property InternalPrepared: Boolean read FInternalPrepared;
455	>	property QDelete: TIBSQL read FQDelete;
456	>	property QInsert: TIBSQL read FQInsert;
457	>	property QRefresh: TIBSQL read FQRefresh;
458	>	property QSelect: TIBSQL read FQSelect;
459	>	property QModify: TIBSQL read FQModify;
460	>	property StatementType: TIBSQLTypes read GetStatementType;
461	>	property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle;
462	>
463	>	{Likely to be made published by descendant classes}
464	>	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
465	>	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
466	>	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
467	>	property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
468	>	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
469	>	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
470	>	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
471	>	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
472	>	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
473	>	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
474	>	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
475	>	property Parser: TSelectSQLParser read GetParser;
476	>	property BaseSQLSelect: TStrings read FBaseSQLSelect;
477	>
478	>	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
479	>	write FBeforeDatabaseDisconnect;
480	>	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
481	>	write FAfterDatabaseDisconnect;
482	>	property DatabaseFree: TNotifyEvent read FDatabaseFree
483	>	write FDatabaseFree;
484	>	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
485	>	write FBeforeTransactionEnd;
486	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
487	>	write FAfterTransactionEnd;
488	>	property TransactionFree: TNotifyEvent read FTransactionFree
489	>	write FTransactionFree;
490	>	property OnValidatePost: TOnValidatePost read FOnValidatePost write FOnValidatePost;
491	>
492	>	public
493	>	constructor Create(AOwner: TComponent); override;
494	>	destructor Destroy; override;
495	>	procedure ApplyUpdates;
496	>	function CachedUpdateStatus: TCachedUpdateStatus;
497	>	procedure CancelUpdates;
498	>	function GetFieldPosition(AliasName: string): integer;
499	>	procedure FetchAll;
500	>	function LocateNext(const KeyFields: string; const KeyValues: Variant;
501	>	Options: TLocateOptions): Boolean;
502	>	procedure RecordModified(Value: Boolean);
503	>	procedure RevertRecord;
504	>	procedure Undelete;
505	>	procedure ResetParser;
506	>	function HasParser: boolean;
507	>
508	>	{ TDataSet support methods }
509	>	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
510	>	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
511	>	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
512	>	function GetCurrentRecord(Buffer: PChar): Boolean; override;
513	>	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
514	>	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
515	>	function GetFieldData(Field : TField; Buffer : Pointer;
516	>	NativeFormat : Boolean) : Boolean; overload; override;
517	>	property GenerateParamNames: Boolean read FGenerateParamNames write SetGenerateParamNames;
518	>	function Locate(const KeyFields: string; const KeyValues: Variant;
519	>	Options: TLocateOptions): Boolean; override;
520	>	function Lookup(const KeyFields: string; const KeyValues: Variant;
521	>	const ResultFields: string): Variant; override;
522	>	function UpdateStatus: TUpdateStatus; override;
523	>	function IsSequenced: Boolean; override;
524	>	procedure Post; override;
525	>	function ParamByName(ParamName: String): TIBXSQLVAR;
526	>	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
527	>	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
528	>	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
529	>	property UpdatesPending: Boolean read FUpdatesPending;
530	>	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
531	>	write SetUpdateRecordTypes;
532	>	property DataSetCloseAction: TDataSetCloseAction
533	>	read FDataSetCloseAction write FDataSetCloseAction;
534	>
535	>	published
536	>	property Database: TIBDatabase read GetDatabase write SetDatabase;
537	>	property Transaction: TIBTransaction read GetTransaction
538	>	write SetTransaction;
539	>	property ForcedRefresh: Boolean read FForcedRefresh
540	>	write FForcedRefresh default False;
541	>	property AutoCalcFields;
542	>
543	>	property AfterCancel;
544	>	property AfterClose;
545	>	property AfterDelete;
546	>	property AfterEdit;
547	>	property AfterInsert;
548	>	property AfterOpen;
549	>	property AfterPost;
550	>	property AfterRefresh;
551	>	property AfterScroll;
552	>	property BeforeCancel;
553	>	property BeforeClose;
554	>	property BeforeDelete;
555	>	property BeforeEdit;
556	>	property BeforeInsert;
557	>	property BeforeOpen;
558	>	property BeforePost;
559	>	property BeforeRefresh;
560	>	property BeforeScroll;
561	>	property OnCalcFields;
562	>	property OnDeleteError;
563	>	property OnEditError;
564	>	property OnNewRecord;
565	>	property OnPostError;
566	>	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
567	>	write FOnUpdateError;
568	>	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
569	>	write FOnUpdateRecord;
570	>	end;
571	>
572	>	TIBParserDataSet = class(TIBCustomDataSet)
573	>	public
574	>	property Parser;
575	>	end;
576	>
577	>	TIBDataSet = class(TIBParserDataSet)
578	>	private
579	>	function GetPrepared: Boolean;
580	>
581	>	protected
582	>	procedure SetFiltered(Value: Boolean); override;
583	>	procedure InternalOpen; override;
584	>
585	>	public
586	>	procedure Prepare;
587	>	procedure UnPrepare;
588	>	procedure BatchInput(InputObject: TIBBatchInput);
589	>	procedure BatchOutput(OutputObject: TIBBatchOutput);
590	>	procedure ExecSQL;
591	>
592	>	public
593	>	property Params;
594	>	property Prepared : Boolean read GetPrepared;
595	>	property QDelete;
596	>	property QInsert;
597	>	property QRefresh;
598	>	property QSelect;
599	>	property QModify;
600	>	property StatementType;
601	>	property SelectStmtHandle;
602	>	property BaseSQLSelect;
603	>
604	>	published
605	>	{ TIBCustomDataSet }
606	>	property AutoCommit;
607	>	property BufferChunks;
608	>	property CachedUpdates;
609	>	property DeleteSQL;
610	>	property InsertSQL;
611	>	property RefreshSQL;
612	>	property SelectSQL;
613	>	property ModifySQL;
614	>	property GeneratorField;
615	>	property GenerateParamNames;
616	>	property ParamCheck;
617	>	property UniDirectional;
618	>	property Filtered;
619	>	property DataSetCloseAction;
620	>
621	>	property BeforeDatabaseDisconnect;
622	>	property AfterDatabaseDisconnect;
623	>	property DatabaseFree;
624	>	property BeforeTransactionEnd;
625	>	property AfterTransactionEnd;
626	>	property TransactionFree;
627	>
628	>	{ TIBDataSet }
629	>	property Active;
630	>	property AutoCalcFields;
631	>	property DataSource read GetDataSource write SetDataSource;
632	>
633	>	property AfterCancel;
634	>	property AfterClose;
635	>	property AfterDelete;
636	>	property AfterEdit;
637	>	property AfterInsert;
638	>	property AfterOpen;
639	>	property AfterPost;
640	>	property AfterScroll;
641	>	property BeforeCancel;
642	>	property BeforeClose;
643	>	property BeforeDelete;
644	>	property BeforeEdit;
645	>	property BeforeInsert;
646	>	property BeforeOpen;
647	>	property BeforePost;
648	>	property BeforeScroll;
649	>	property OnCalcFields;
650	>	property OnDeleteError;
651	>	property OnEditError;
652	>	property OnFilterRecord;
653	>	property OnNewRecord;
654	>	property OnPostError;
655	>	property OnValidatePost;
656	>	end;
657	>
658	>	{ TIBDSBlobStream }
659	>	TIBDSBlobStream = class(TStream)
660	>	private
661	>	FHasWritten: boolean;
662	>	protected
663	>	FField: TField;
664	>	FBlobStream: TIBBlobStream;
665	>	public
666	>	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
667	>	Mode: TBlobStreamMode);
668	>	destructor Destroy; override;
669	>	function Read(var Buffer; Count: Longint): Longint; override;
670	>	function Seek(Offset: Longint; Origin: Word): Longint; override;
671	>	procedure SetSize(NewSize: Longint); override;
672	>	function Write(const Buffer; Count: Longint): Longint; override;
673	>	end;
674	>
675	>	const
676	>	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
677	>	nil,                { ftUnknown }
678	>	TIBStringField,     { ftString }
679	>	TSmallintField,     { ftSmallint }
680	>	TIntegerField,      { ftInteger }
681	>	TWordField,         { ftWord }
682	>	TBooleanField,      { ftBoolean }
683	>	TFloatField,        { ftFloat }
684	>	TCurrencyField,     { ftCurrency }
685	>	TIBBCDField,        { ftBCD }
686	>	TDateField,         { ftDate }
687	>	TTimeField,         { ftTime }
688	>	TDateTimeField,     { ftDateTime }
689	>	TBytesField,        { ftBytes }
690	>	TVarBytesField,     { ftVarBytes }
691	>	TAutoIncField,      { ftAutoInc }
692	>	TBlobField,         { ftBlob }
693	>	TMemoField,         { ftMemo }
694	>	TGraphicField,      { ftGraphic }
695	>	TBlobField,         { ftFmtMemo }
696	>	TBlobField,         { ftParadoxOle }
697	>	TBlobField,         { ftDBaseOle }
698	>	TBlobField,         { ftTypedBinary }
699	>	nil,                { ftCursor }
700	>	TStringField,       { ftFixedChar }
701	>	TWideStringField,    { ftWideString }
702	>	TLargeIntField,     { ftLargeInt }
703	>	nil,          { ftADT }
704	>	nil,        { ftArray }
705	>	nil,    { ftReference }
706	>	nil,     { ftDataSet }
707	>	TBlobField,         { ftOraBlob }
708	>	TMemoField,         { ftOraClob }
709	>	TVariantField,      { ftVariant }
710	>	nil,    { ftInterface }
711	>	nil,     { ftIDispatch }
712	>	TGuidField,        { ftGuid }
713	>	TDateTimeField,    {ftTimestamp}
714	>	TIBBCDField,       {ftFMTBcd}
715	>	nil,  {ftFixedWideChar}
716	>	TWideMemoField);   {ftWideMemo}
717	>	(*
718	>	TADTField,          { ftADT }
719	>	TArrayField,        { ftArray }
720	>	TReferenceField,    { ftReference }
721	>	TDataSetField,     { ftDataSet }
722	>	TBlobField,         { ftOraBlob }
723	>	TMemoField,         { ftOraClob }
724	>	TVariantField,      { ftVariant }
725	>	TInterfaceField,    { ftInterface }
726	>	TIDispatchField,     { ftIDispatch }
727	>	TGuidField);        { ftGuid } *)
728	>	(*var
729	>	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
730	>
731	>	implementation
732	>
733	>	uses IBIntf, Variants, FmtBCD;
734	>
735	>	const FILE_BEGIN = 0;
736	>	FILE_CURRENT = 1;
737	>	FILE_END = 2;
738	>
739	>	type
740	>
741	>	TFieldNode = class(TObject)
742	>	protected
743	>	FieldName : String;
744	>	COMPUTED_BLR : Boolean;
745	>	DEFAULT_VALUE : boolean;
746	>	NextField : TFieldNode;
747	>	end;
748	>
749	>	TRelationNode = class(TObject)
750	>	protected
751	>	RelationName : String;
752	>	FieldNodes : TFieldNode;
753	>	NextRelation : TRelationNode;
754	>	end;
755	>
756	>	{ TIBControlLink }
757	>
758	>	destructor TIBControlLink.Destroy;
759	>	begin
760	>	IBDataSet := nil;
761	>	inherited Destroy;
762	>	end;
763	>
764	>	procedure TIBControlLink.UpdateParams(Sender: TObject);
765	>	begin
766	>
767	>	end;
768	>
769	>	procedure TIBControlLink.UpdateSQL(Sender: TObject);
770	>	begin
771	>
772	>	end;
773	>
774	>	procedure TIBControlLink.SetIBDataSet(AValue: TIBCustomDataSet);
775	>	begin
776	>	if FTIBDataSet = AValue then Exit;
777	>	if IBDataSet <> nil then
778	>	IBDataSet.UnRegisterIBLink(self);
779	>	FTIBDataSet := AValue;
780	>	if IBDataSet <> nil then
781	>	IBDataSet.RegisterIBLink(self);
782	>	end;
783	>
784	>
785	>	{ TIBStringField}
786	>
787	>	constructor TIBStringField.create(AOwner: TComponent);
788	>	begin
789	>	inherited Create(AOwner);
790	>	end;
791	>
792	>	class procedure TIBStringField.CheckTypeSize(Value: Integer);
793	>	begin
794	>	{ don't check string size. all sizes valid }
795	>	end;
796	>
797	>	function TIBStringField.GetAsString: string;
798	>	begin
799	>	if not GetValue(Result) then Result := '';
800	>	end;
801	>
802	>	function TIBStringField.GetAsVariant: Variant;
803	>	var
804	>	S: string;
805	>	begin
806	>	if GetValue(S) then Result := S else Result := Null;
807	>	end;
808	>
809	>	function TIBStringField.GetValue(var Value: string): Boolean;
810	>	var
811	>	Buffer: PChar;
812	>	begin
813	>	Buffer := nil;
814	>	IBAlloc(Buffer, 0, Size + 1);
815	>	try
816	>	Result := GetData(Buffer);
817	>	if Result then
818	>	begin
819	>	Value := string(Buffer);
820	>	if Transliterate and (Value <> '') then
821	>	DataSet.Translate(PChar(Value), PChar(Value), False);
822	>	end
823	>	finally
824	>	FreeMem(Buffer);
825	>	end;
826	>	end;
827	>
828	>	procedure TIBStringField.SetAsString(const Value: string);
829	>	var
830	>	Buffer: PChar;
831	>	begin
832	>	Buffer := nil;
833	>	IBAlloc(Buffer, 0, Size + 1);
834	>	try
835	>	StrLCopy(Buffer, PChar(Value), Size);
836	>	if Transliterate then
837	>	DataSet.Translate(Buffer, Buffer, True);
838	>	SetData(Buffer);
839	>	finally
840	>	FreeMem(Buffer);
841	>	end;
842	>	end;
843	>
844	>	procedure TIBStringField.SetSize(AValue: Integer);
845	>	var FieldSize: integer;
846	>	begin
847	>	if csLoading in ComponentState then
848	>	FInitialised := true;
849	>	if FInitialised then
850	>	inherited SetSize(AValue)
851	>	else
852	>	begin
853	>	{IBCustomDataSet encodes the CharWidth size in the size}
854	>	FieldSize := AValue div 4;
855	>	inherited SetSize(FieldSize);
856	>	DisplayWidth := FieldSize div ((AValue mod 4) + 1);
857	>	FInitialised := true;
858	>	end;
859	>	end;
860	>
861	>	{ TIBBCDField }
862	>
863	>	constructor TIBBCDField.Create(AOwner: TComponent);
864	>	begin
865	>	inherited Create(AOwner);
866	>	SetDataType(ftBCD);
867	>	Size := 8;
868	>	end;
869	>
870	>	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
871	>	begin
872	>	{ No need to check as the base type is currency, not BCD }
873	>	end;
874	>
875	>	function TIBBCDField.GetAsCurrency: Currency;
876	>	begin
877	>	if not GetValue(Result) then
878	>	Result := 0;
879	>	end;
880	>
881	>	function TIBBCDField.GetAsString: string;
882	>	var
883	>	C: System.Currency;
884	>	begin
885	>	if GetValue(C) then
886	>	Result := CurrToStr(C)
887	>	else
888	>	Result := '';
889	>	end;
890	>
891	>	function TIBBCDField.GetAsVariant: Variant;
892	>	var
893	>	C: System.Currency;
894	>	begin
895	>	if GetValue(C) then
896	>	Result := C
897	>	else
898	>	Result := Null;
899	>	end;
900	>
901	>	function TIBBCDField.GetDataSize: Integer;
902	>	begin
903	>	{$IFDEF TBCDFIELD_IS_BCD}
904	>	Result := 8;
905	>	{$ELSE}
906	>	Result := inherited GetDataSize
907	>	{$ENDIF}
908	>	end;
909	>
910	>	{ TIBDataLink }
911	>
912	>	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
913	>	begin
914	>	inherited Create;
915	>	FDataSet := ADataSet;
916	>	end;
917	>
918	>	destructor TIBDataLink.Destroy;
919	>	begin
920	>	FDataSet.FDataLink := nil;
921	>	inherited Destroy;
922	>	end;
923	>
924	>
925	>	procedure TIBDataLink.ActiveChanged;
926	>	begin
927	>	if FDataSet.Active then
928	>	FDataSet.RefreshParams;
929	>	end;
930	>
931	>
932	>	function TIBDataLink.GetDetailDataSet: TDataSet;
933	>	begin
934	>	Result := FDataSet;
935	>	end;
936	>
937	>	procedure TIBDataLink.RecordChanged(Field: TField);
938	>	begin
939	>	if (Field = nil) and FDataSet.Active then
940	>	FDataSet.RefreshParams;
941	>	end;
942	>
943	>	procedure TIBDataLink.CheckBrowseMode;
944	>	begin
945	>	if FDataSet.Active then
946	>	FDataSet.CheckBrowseMode;
947	>	end;
948	>
949	>	{ TIBCustomDataSet }
950	>
951	>	constructor TIBCustomDataSet.Create(AOwner: TComponent);
952	>	begin
953	>	inherited Create(AOwner);
954	>	FIBLoaded := False;
955	>	CheckIBLoaded;
956	>	FIBLoaded := True;
957	>	FBase := TIBBase.Create(Self);
958	>	FIBLinks := TList.Create;
959	>	FCurrentRecord := -1;
960	>	FDeletedRecords := 0;
961	>	FUniDirectional := False;
962	>	FBufferChunks := BufferCacheSize;
963	>	FBlobStreamList := TList.Create;
964	>	FGeneratorField := TIBGenerator.Create(self);
965	>	FDataLink := TIBDataLink.Create(Self);
966	>	FQDelete := TIBSQL.Create(Self);
967	>	FQDelete.OnSQLChanging := SQLChanging;
968	>	FQDelete.GoToFirstRecordOnExecute := False;
969	>	FQInsert := TIBSQL.Create(Self);
970	>	FQInsert.OnSQLChanging := SQLChanging;
971	>	FQInsert.GoToFirstRecordOnExecute := False;
972	>	FQRefresh := TIBSQL.Create(Self);
973	>	FQRefresh.OnSQLChanging := SQLChanging;
974	>	FQRefresh.GoToFirstRecordOnExecute := False;
975	>	FQSelect := TIBSQL.Create(Self);
976	>	FQSelect.OnSQLChanging := SQLChanging;
977	>	FQSelect.GoToFirstRecordOnExecute := False;
978	>	FQModify := TIBSQL.Create(Self);
979	>	FQModify.OnSQLChanging := SQLChanging;
980	>	FQModify.GoToFirstRecordOnExecute := False;
981	>	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
982	>	FParamCheck := True;
983	>	FGenerateParamNames := False;
984	>	FForcedRefresh := False;
985	>	FAutoCommit:= acDisabled;
986	>	FDataSetCloseAction := dcDiscardChanges;
987	>	{Bookmark Size is Integer for IBX}
988	>	BookmarkSize := SizeOf(Integer);
989	>	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
990	>	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
991	>	FBase.OnDatabaseFree := DoDatabaseFree;
992	>	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
993	>	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
994	>	FBase.OnTransactionFree := DoTransactionFree;
995	>	if AOwner is TIBDatabase then
996	>	Database := TIBDatabase(AOwner)
997	>	else
998	>	if AOwner is TIBTransaction then
999	>	Transaction := TIBTransaction(AOwner);
1000	>	FBaseSQLSelect := TStringList.Create;
1001	>	end;
1002	>
1003	>	destructor TIBCustomDataSet.Destroy;
1004	>	begin
1005	>	if Active then Active := false;
1006	>	if FIBLoaded then
1007	>	begin
1008	>	if assigned(FGeneratorField) then FGeneratorField.Free;
1009	>	FDataLink.Free;
1010	>	FBase.Free;
1011	>	ClearBlobCache;
1012	>	ClearIBLinks;
1013	>	FIBLinks.Free;
1014	>	FBlobStreamList.Free;
1015	>	FreeMem(FBufferCache);
1016	>	FBufferCache := nil;
1017	>	FreeMem(FOldBufferCache);
1018	>	FOldBufferCache := nil;
1019	>	FCacheSize := 0;
1020	>	FOldCacheSize := 0;
1021	>	FMappedFieldPosition := nil;
1022	>	end;
1023	>	if assigned(FBaseSQLSelect) then FBaseSQLSelect.Free;
1024	>	if assigned(FParser) then FParser.Free;
1025	>	inherited Destroy;
1026	>	end;
1027	>
1028	>	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
1029	>	TGetResult;
1030	>	begin
1031	>	while not IsVisible(Buffer) do
1032	>	begin
1033	>	if GetMode = gmPrior then
1034	>	begin
1035	>	Dec(FCurrentRecord);
1036	>	if FCurrentRecord = -1 then
1037	>	begin
1038	>	result := grBOF;
1039	>	exit;
1040	>	end;
1041	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1042	>	end
1043	>	else begin
1044	>	Inc(FCurrentRecord);
1045	>	if (FCurrentRecord = FRecordCount) then
1046	>	begin
1047	>	if (not FQSelect.EOF) and (FQSelect.Next <> nil) then
1048	>	begin
1049	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
1050	>	Inc(FRecordCount);
1051	>	end
1052	>	else begin
1053	>	result := grEOF;
1054	>	exit;
1055	>	end;
1056	>	end
1057	>	else
1058	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1059	>	end;
1060	>	end;
1061	>	result := grOK;
1062	>	end;
1063	>
1064	>	procedure TIBCustomDataSet.ApplyUpdates;
1065	>	var
1066	>	{$IF FPC_FULLVERSION >= 20700 }
1067	>	CurBookmark: TBookmark;
1068	>	{$ELSE}
1069	>	CurBookmark: string;
1070	>	{$ENDIF}
1071	>	Buffer: PRecordData;
1072	>	CurUpdateTypes: TIBUpdateRecordTypes;
1073	>	UpdateAction: TIBUpdateAction;
1074	>	UpdateKind: TUpdateKind;
1075	>	bRecordsSkipped: Boolean;
1076	>
1077	>	procedure GetUpdateKind;
1078	>	begin
1079	>	case Buffer^.rdCachedUpdateStatus of
1080	>	cusModified:
1081	>	UpdateKind := ukModify;
1082	>	cusInserted:
1083	>	UpdateKind := ukInsert;
1084	>	else
1085	>	UpdateKind := ukDelete;
1086	>	end;
1087	>	end;
1088	>
1089	>	procedure ResetBufferUpdateStatus;
1090	>	begin
1091	>	case Buffer^.rdCachedUpdateStatus of
1092	>	cusModified:
1093	>	begin
1094	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1095	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1096	>	end;
1097	>	cusInserted:
1098	>	begin
1099	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1100	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1101	>	end;
1102	>	cusDeleted:
1103	>	begin
1104	>	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
1105	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1106	>	end;
1107	>	end;
1108	>	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
1109	>	end;
1110	>
1111	>	procedure UpdateUsingOnUpdateRecord;
1112	>	begin
1113	>	UpdateAction := uaFail;
1114	>	try
1115	>	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
1116	>	except
1117	>	on E: Exception do
1118	>	begin
1119	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1120	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1121	>	if UpdateAction = uaFail then
1122	>	raise;
1123	>	end;
1124	>	end;
1125	>	end;
1126	>
1127	>	procedure UpdateUsingUpdateObject;
1128	>	begin
1129	>	try
1130	>	FUpdateObject.Apply(UpdateKind,PChar(Buffer));
1131	>	ResetBufferUpdateStatus;
1132	>	except
1133	>	on E: Exception do
1134	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1135	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1136	>	end;
1137	>	end;
1138	>
1139	>	procedure UpdateUsingInternalquery;
1140	>	begin
1141	>	try
1142	>	case Buffer^.rdCachedUpdateStatus of
1143	>	cusModified:
1144	>	InternalPostRecord(FQModify, Buffer);
1145	>	cusInserted:
1146	>	InternalPostRecord(FQInsert, Buffer);
1147	>	cusDeleted:
1148	>	InternalDeleteRecord(FQDelete, Buffer);
1149	>	end;
1150	>	except
1151	>	on E: EIBError do begin
1152	>	UpdateAction := uaFail;
1153	>	if Assigned(FOnUpdateError) then
1154	>	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
1155	>	case UpdateAction of
1156	>	uaFail: raise;
1157	>	uaAbort: SysUtils.Abort;
1158	>	uaSkip: bRecordsSkipped := True;
1159	>	end;
1160	>	end;
1161	>	end;
1162	>	end;
1163	>
1164	>	begin
1165	>	if State in [dsEdit, dsInsert] then
1166	>	Post;
1167	>	FBase.CheckDatabase;
1168	>	FBase.CheckTransaction;
1169	>	DisableControls;
1170	>	CurBookmark := Bookmark;
1171	>	CurUpdateTypes := FUpdateRecordTypes;
1172	>	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1173	>	try
1174	>	First;
1175	>	bRecordsSkipped := False;
1176	>	while not EOF do
1177	>	begin
1178	>	Buffer := PRecordData(GetActiveBuf);
1179	>	GetUpdateKind;
1180	>	UpdateAction := uaApply;
1181	>	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
1182	>	begin
1183	>	if (Assigned(FOnUpdateRecord)) then
1184	>	UpdateUsingOnUpdateRecord
1185	>	else
1186	>	if Assigned(FUpdateObject) then
1187	>	UpdateUsingUpdateObject;
1188	>	case UpdateAction of
1189	>	uaFail:
1190	>	IBError(ibxeUserAbort, [nil]);
1191	>	uaAbort:
1192	>	SysUtils.Abort;
1193	>	uaApplied:
1194	>	ResetBufferUpdateStatus;
1195	>	uaSkip:
1196	>	bRecordsSkipped := True;
1197	>	uaRetry:
1198	>	Continue;
1199	>	end;
1200	>	end;
1201	>	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
1202	>	begin
1203	>	UpdateUsingInternalquery;
1204	>	UpdateAction := uaApplied;
1205	>	end;
1206	>	Next;
1207	>	end;
1208	>	FUpdatesPending := bRecordsSkipped;
1209	>	finally
1210	>	FUpdateRecordTypes := CurUpdateTypes;
1211	>	Bookmark := CurBookmark;
1212	>	EnableControls;
1213	>	end;
1214	>	end;
1215	>
1216	>	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1217	>	begin
1218	>	FQSelect.BatchInput(InputObject);
1219	>	end;
1220	>
1221	>	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1222	>	var
1223	>	Qry: TIBSQL;
1224	>	begin
1225	>	Qry := TIBSQL.Create(Self);
1226	>	try
1227	>	Qry.Database := FBase.Database;
1228	>	Qry.Transaction := FBase.Transaction;
1229	>	Qry.SQL.Assign(FQSelect.SQL);
1230	>	Qry.BatchOutput(OutputObject);
1231	>	finally
1232	>	Qry.Free;
1233	>	end;
1234	>	end;
1235	>
1236	>	procedure TIBCustomDataSet.CancelUpdates;
1237	>	var
1238	>	CurUpdateTypes: TIBUpdateRecordTypes;
1239	>	begin
1240	>	if State in [dsEdit, dsInsert] then
1241	>	Post;
1242	>	if FCachedUpdates and FUpdatesPending then
1243	>	begin
1244	>	DisableControls;
1245	>	CurUpdateTypes := UpdateRecordTypes;
1246	>	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1247	>	try
1248	>	First;
1249	>	while not EOF do
1250	>	begin
1251	>	if UpdateStatus = usInserted then
1252	>	RevertRecord
1253	>	else
1254	>	begin
1255	>	RevertRecord;
1256	>	Next;
1257	>	end;
1258	>	end;
1259	>	finally
1260	>	UpdateRecordTypes := CurUpdateTypes;
1261	>	First;
1262	>	FUpdatesPending := False;
1263	>	EnableControls;
1264	>	end;
1265	>	end;
1266	>	end;
1267	>
1268	>	function TIBCustomDataSet.GetFieldPosition(AliasName: string): integer;
1269	>	var i: integer;
1270	>	Prepared: boolean;
1271	>	begin
1272	>	Result := 0;
1273	>	Prepared := FInternalPrepared;
1274	>	if not Prepared then
1275	>	InternalPrepare;
1276	>	try
1277	>	for i := 0 to Length(FAliasNameList) - 1 do
1278	>	if FAliasNameList[i] = AliasName then
1279	>	begin
1280	>	Result := i + 1;
1281	>	Exit
1282	>	end;
1283	>	finally
1284	>	if not Prepared then
1285	>	InternalUnPrepare;
1286	>	end;
1287	>	end;
1288	>
1289	>	procedure TIBCustomDataSet.ActivateConnection;
1290	>	begin
1291	>	if not Assigned(Database) then
1292	>	IBError(ibxeDatabaseNotAssigned, [nil]);
1293	>	if not Assigned(Transaction) then
1294	>	IBError(ibxeTransactionNotAssigned, [nil]);
1295	>	if not Database.Connected then Database.Open;
1296	>	end;
1297	>
1298	>	function TIBCustomDataSet.ActivateTransaction: Boolean;
1299	>	begin
1300	>	Result := False;
1301	>	if not Assigned(Transaction) then
1302	>	IBError(ibxeTransactionNotAssigned, [nil]);
1303	>	if not Transaction.Active then
1304	>	begin
1305	>	Result := True;
1306	>	Transaction.StartTransaction;
1307	>	FDidActivate := True;
1308	>	end;
1309	>	end;
1310	>
1311	>	procedure TIBCustomDataSet.DeactivateTransaction;
1312	>	var
1313	>	i: Integer;
1314	>	begin
1315	>	if not Assigned(Transaction) then
1316	>	IBError(ibxeTransactionNotAssigned, [nil]);
1317	>	with Transaction do
1318	>	begin
1319	>	for i := 0 to SQLObjectCount - 1 do
1320	>	begin
1321	>	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1322	>	begin
1323	>	if TDataSet(SQLObjects[i].owner).Active then
1324	>	begin
1325	>	FDidActivate := False;
1326	>	exit;
1327	>	end;
1328	>	end;
1329	>	end;
1330	>	end;
1331	>	FInternalPrepared := False;
1332	>	if Transaction.InTransaction then
1333	>	Transaction.Commit;
1334	>	FDidActivate := False;
1335	>	end;
1336	>
1337	>	procedure TIBCustomDataSet.CheckDatasetClosed;
1338	>	begin
1339	>	if FOpen then
1340	>	IBError(ibxeDatasetOpen, [nil]);
1341	>	end;
1342	>
1343	>	procedure TIBCustomDataSet.CheckDatasetOpen;
1344	>	begin
1345	>	if not FOpen then
1346	>	IBError(ibxeDatasetClosed, [nil]);
1347	>	end;
1348	>
1349	>	function TIBCustomDataSet.CreateParser: TSelectSQLParser;
1350	>	begin
1351	>	Result := TSelectSQLParser.Create(self,FBaseSQLSelect);
1352	>	Result.OnSQLChanging := SQLChanging
1353	>	end;
1354	>
1355	>	procedure TIBCustomDataSet.CheckNotUniDirectional;
1356	>	begin
1357	>	if UniDirectional then
1358	>	IBError(ibxeDataSetUniDirectional, [nil]);
1359	>	end;
1360	>
1361	>	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1362	>	begin
1363	>	with PRecordData(Buffer)^ do
1364	>	if (State = dsInsert) and (not Modified) then
1365	>	begin
1366	>	rdRecordNumber := FRecordCount;
1367	>	FCurrentRecord := FRecordCount;
1368	>	end;
1369	>	end;
1370	>
1371	>	function TIBCustomDataSet.CanEdit: Boolean;
1372	>	var
1373	>	Buff: PRecordData;
1374	>	begin
1375	>	Buff := PRecordData(GetActiveBuf);
1376	>	result := (FQModify.SQL.Text <> '') or
1377	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1378	>	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1379	>	(FCachedUpdates));
1380	>	end;
1381	>
1382	>	function TIBCustomDataSet.CanInsert: Boolean;
1383	>	begin
1384	>	result := (FQInsert.SQL.Text <> '') or
1385	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1386	>	end;
1387	>
1388	>	function TIBCustomDataSet.CanDelete: Boolean;
1389	>	begin
1390	>	if (FQDelete.SQL.Text <> '') or
1391	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1392	>	result := True
1393	>	else
1394	>	result := False;
1395	>	end;
1396	>
1397	>	function TIBCustomDataSet.CanRefresh: Boolean;
1398	>	begin
1399	>	result := (FQRefresh.SQL.Text <> '') or
1400	>	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1401	>	end;
1402	>
1403	>	procedure TIBCustomDataSet.CheckEditState;
1404	>	begin
1405	>	case State of
1406	>	{ Check all the wsEditMode types }
1407	>	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1408	>	dsNewValue, dsInternalCalc :
1409	>	begin
1410	>	if (State in [dsEdit]) and (not CanEdit) then
1411	>	IBError(ibxeCannotUpdate, [nil]);
1412	>	if (State in [dsInsert]) and (not CanInsert) then
1413	>	IBError(ibxeCannotInsert, [nil]);
1414	>	end;
1415	>	else
1416	>	IBError(ibxeNotEditing, [])
1417	>	end;
1418	>	end;
1419	>
1420	>	procedure TIBCustomDataSet.ClearBlobCache;
1421	>	var
1422	>	i: Integer;
1423	>	begin
1424	>	for i := 0 to FBlobStreamList.Count - 1 do
1425	>	begin
1426	>	TIBBlobStream(FBlobStreamList[i]).Free;
1427	>	FBlobStreamList[i] := nil;
1428	>	end;
1429	>	FBlobStreamList.Pack;
1430	>	end;
1431	>
1432	>	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1433	>	begin
1434	>	Move(Source^, Dest^, FRecordBufferSize);
1435	>	end;
1436	>
1437	>	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1438	>	begin
1439	>	if Active then
1440	>	Active := False;
1441	>	FInternalPrepared := False;
1442	>	if Assigned(FBeforeDatabaseDisconnect) then
1443	>	FBeforeDatabaseDisconnect(Sender);
1444	>	end;
1445	>
1446	>	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1447	>	begin
1448	>	if Assigned(FAfterDatabaseDisconnect) then
1449	>	FAfterDatabaseDisconnect(Sender);
1450	>	end;
1451	>
1452	>	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1453	>	begin
1454	>	if Assigned(FDatabaseFree) then
1455	>	FDatabaseFree(Sender);
1456	>	end;
1457	>
1458	>	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject;
1459	>	Action: TTransactionAction);
1460	>	begin
1461	>	FCloseAction := Action;
1462	>	FInTransactionEnd := true;
1463	>	try
1464	>	if Active then
1465	>	Active := False;
1466	>	finally
1467	>	FInTransactionEnd := false;
1468	>	end;
1469	>	if FQSelect <> nil then
1470	>	FQSelect.FreeHandle;
1471	>	if FQDelete <> nil then
1472	>	FQDelete.FreeHandle;
1473	>	if FQInsert <> nil then
1474	>	FQInsert.FreeHandle;
1475	>	if FQModify <> nil then
1476	>	FQModify.FreeHandle;
1477	>	if FQRefresh <> nil then
1478	>	FQRefresh.FreeHandle;
1479	>	if Assigned(FBeforeTransactionEnd) then
1480	>	FBeforeTransactionEnd(Sender);
1481	>	end;
1482	>
1483	>	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1484	>	begin
1485	>	if Assigned(FAfterTransactionEnd) then
1486	>	FAfterTransactionEnd(Sender);
1487	>	end;
1488	>
1489	>	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1490	>	begin
1491	>	if Assigned(FTransactionFree) then
1492	>	FTransactionFree(Sender);
1493	>	end;
1494	>
1495	>	{ Read the record from FQSelect.Current into the record buffer
1496	>	Then write the buffer to in memory cache }
1497	>	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
1498	>	RecordNumber: Integer; Buffer: PChar);
1499	>	var
1500	>	p: PRecordData;
1501	>	pbd: PBlobDataArray;
1502	>	i, j: Integer;
1503	>	LocalData: Pointer;
1504	>	LocalDate, LocalDouble: Double;
1505	>	LocalInt: Integer;
1506	>	LocalBool: wordBool;
1507	>	LocalInt64: Int64;
1508	>	LocalCurrency: Currency;
1509	>	FieldsLoaded: Integer;
1510	>	temp: TIBXSQLVAR;
1511	>	begin
1512	>	p := PRecordData(Buffer);
1513	>	{ Make sure blob cache is empty }
1514	>	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
1515	>	if RecordNumber > -1 then
1516	>	for i := 0 to BlobFieldCount - 1 do
1517	>	pbd^[i] := nil;
1518	>	{ Get record information }
1519	>	p^.rdBookmarkFlag := bfCurrent;
1520	>	p^.rdFieldCount := Qry.Current.Count;
1521	>	p^.rdRecordNumber := RecordNumber;
1522	>	p^.rdUpdateStatus := usUnmodified;
1523	>	p^.rdCachedUpdateStatus := cusUnmodified;
1524	>	p^.rdSavedOffset := $FFFFFFFF;
1525	>
1526	>	{ Load up the fields }
1527	>	FieldsLoaded := FQSelect.Current.Count;
1528	>	j := 1;
1529	>	for i := 0 to Qry.Current.Count - 1 do
1530	>	begin
1531	>	if (Qry = FQSelect) then
1532	>	j := i + 1
1533	>	else begin
1534	>	if FieldsLoaded = 0 then
1535	>	break;
1536	>	j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1;
1537	>	if j < 1 then
1538	>	continue
1539	>	else
1540	>	Dec(FieldsLoaded);
1541	>	end;
1542	>	with FQSelect.Current[j - 1].Data^ do
1543	>	if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
1544	>	begin
1545	>	if sqllen <= 8 then
1546	>	p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^;
1547	>	continue;
1548	>	end;
1549	>	if j > 0 then with p^ do
1550	>	begin
1551	>	rdFields[j].fdDataType :=
1552	>	Qry.Current[i].Data^.sqltype and (not 1);
1553	>	rdFields[j].fdDataScale :=
1554	>	Qry.Current[i].Data^.sqlscale;
1555	>	rdFields[j].fdNullable :=
1556	>	(Qry.Current[i].Data^.sqltype and 1 = 1);
1557	>	rdFields[j].fdIsNull :=
1558	>	(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1));
1559	>	LocalData := Qry.Current[i].Data^.sqldata;
1560	>	case rdFields[j].fdDataType of
1561	>	SQL_TIMESTAMP:
1562	>	begin
1563	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1564	>	if RecordNumber >= 0 then
1565	>	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime));
1566	>	LocalData := PChar(@LocalDate);
1567	>	end;
1568	>	SQL_TYPE_DATE:
1569	>	begin
1570	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1571	>	if RecordNumber >= 0 then
1572	>	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date;
1573	>	LocalData := PChar(@LocalInt);
1574	>	end;
1575	>	SQL_TYPE_TIME:
1576	>	begin
1577	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1578	>	if RecordNumber >= 0 then
1579	>	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time;
1580	>	LocalData := PChar(@LocalInt);
1581	>	end;
1582	>	SQL_SHORT, SQL_LONG:
1583	>	begin
1584	>	if (rdFields[j].fdDataScale = 0) then
1585	>	begin
1586	>	rdFields[j].fdDataSize := SizeOf(Integer);
1587	>	if RecordNumber >= 0 then
1588	>	LocalInt := Qry.Current[i].AsLong;
1589	>	LocalData := PChar(@LocalInt);
1590	>	end
1591	>	else if (rdFields[j].fdDataScale >= (-4)) then
1592	>	begin
1593	>	rdFields[j].fdDataSize := SizeOf(Currency);
1594	>	if RecordNumber >= 0 then
1595	>	LocalCurrency := Qry.Current[i].AsCurrency;
1596	>	LocalData := PChar(@LocalCurrency);
1597	>	end
1598	>	else begin
1599	>	rdFields[j].fdDataSize := SizeOf(Double);
1600	>	if RecordNumber >= 0 then
1601	>	LocalDouble := Qry.Current[i].AsDouble;
1602	>	LocalData := PChar(@LocalDouble);
1603	>	end;
1604	>	end;
1605	>	SQL_INT64:
1606	>	begin
1607	>	if (rdFields[j].fdDataScale = 0) then
1608	>	begin
1609	>	rdFields[j].fdDataSize := SizeOf(Int64);
1610	>	if RecordNumber >= 0 then
1611	>	LocalInt64 := Qry.Current[i].AsInt64;
1612	>	LocalData := PChar(@LocalInt64);
1613	>	end
1614	>	else if (rdFields[j].fdDataScale >= (-4)) then
1615	>	begin
1616	>	rdFields[j].fdDataSize := SizeOf(Currency);
1617	>	if RecordNumber >= 0 then
1618	>	LocalCurrency := Qry.Current[i].AsCurrency;
1619	>	LocalData := PChar(@LocalCurrency);
1620	>	end
1621	>	else begin
1622	>	rdFields[j].fdDataSize := SizeOf(Double);
1623	>	if RecordNumber >= 0 then
1624	>	LocalDouble := Qry.Current[i].AsDouble;
1625	>	LocalData := PChar(@LocalDouble);
1626	>	end
1627	>	end;
1628	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
1629	>	begin
1630	>	rdFields[j].fdDataSize := SizeOf(Double);
1631	>	if RecordNumber >= 0 then
1632	>	LocalDouble := Qry.Current[i].AsDouble;
1633	>	LocalData := PChar(@LocalDouble);
1634	>	end;
1635	>	SQL_VARYING:
1636	>	begin
1637	>	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1638	>	rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2);
1639	>	if RecordNumber >= 0 then
1640	>	begin
1641	>	if (rdFields[j].fdDataLength = 0) then
1642	>	LocalData := nil
1643	>	else
1644	>	begin
1645	>	temp :=  Qry.Current[i];
1646	>	LocalData := @temp.Data^.sqldata[2];
1647	>	(*              LocalData := @Qry.Current[i].Data^.sqldata[2];*)
1648	>	end;
1649	>	end;
1650	>	end;
1651	>	SQL_BOOLEAN:
1652	>	begin
1653	>	LocalBool:= false;
1654	>	rdFields[j].fdDataSize := SizeOf(wordBool);
1655	>	if RecordNumber >= 0 then
1656	>	LocalBool := Qry.Current[i].AsBoolean;
1657	>	LocalData := PChar(@LocalBool);
1658	>	end;
1659	>	else { SQL_TEXT, SQL_BLOB, SQL_ARRAY, SQL_QUAD }
1660	>	begin
1661	>	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1662	>	if (rdFields[j].fdDataType = SQL_TEXT) then
1663	>	rdFields[j].fdDataLength := rdFields[j].fdDataSize;
1664	>	end;
1665	>	end;
1666	>	if RecordNumber < 0 then
1667	>	begin
1668	>	rdFields[j].fdIsNull := True;
1669	>	rdFields[j].fdDataOfs := FRecordSize;
1670	>	Inc(FRecordSize, rdFields[j].fdDataSize);
1671	>	end
1672	>	else begin
1673	>	if rdFields[j].fdDataType = SQL_VARYING then
1674	>	begin
1675	>	if LocalData <> nil then
1676	>	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength)
1677	>	end
1678	>	else
1679	>	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize)
1680	>	end;
1681	>	end;
1682	>	end;
1683	>	WriteRecordCache(RecordNumber, PChar(p));
1684	>	end;
1685	>
1686	>	function TIBCustomDataSet.GetActiveBuf: PChar;
1687	>	begin
1688	>	case State of
1689	>	dsBrowse:
1690	>	if IsEmpty then
1691	>	result := nil
1692	>	else
1693	>	result := ActiveBuffer;
1694	>	dsEdit, dsInsert:
1695	>	result := ActiveBuffer;
1696	>	dsCalcFields:
1697	>	result := CalcBuffer;
1698	>	dsFilter:
1699	>	result := FFilterBuffer;
1700	>	dsNewValue:
1701	>	result := ActiveBuffer;
1702	>	dsOldValue:
1703	>	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
1704	>	PRecordData(FOldBuffer)^.rdRecordNumber) then
1705	>	result := FOldBuffer
1706	>	else
1707	>	result := ActiveBuffer;
1708	>	else if not FOpen then
1709	>	result := nil
1710	>	else
1711	>	result := ActiveBuffer;
1712	>	end;
1713	>	end;
1714	>
1715	>	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
1716	>	begin
1717	>	if Active then
1718	>	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
1719	>	else
1720	>	result := cusUnmodified;
1721	>	end;
1722	>
1723	>	function TIBCustomDataSet.GetDatabase: TIBDatabase;
1724	>	begin
1725	>	result := FBase.Database;
1726	>	end;
1727	>
1728	>	function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE;
1729	>	begin
1730	>	result := FBase.DBHandle;
1731	>	end;
1732	>
1733	>	function TIBCustomDataSet.GetDeleteSQL: TStrings;
1734	>	begin
1735	>	result := FQDelete.SQL;
1736	>	end;
1737	>
1738	>	function TIBCustomDataSet.GetInsertSQL: TStrings;
1739	>	begin
1740	>	result := FQInsert.SQL;
1741	>	end;
1742	>
1743	>	function TIBCustomDataSet.GetSQLParams: TIBXSQLDA;
1744	>	begin
1745	>	if not FInternalPrepared then
1746	>	InternalPrepare;
1747	>	result := FQSelect.Params;
1748	>	end;
1749	>
1750	>	function TIBCustomDataSet.GetRefreshSQL: TStrings;
1751	>	begin
1752	>	result := FQRefresh.SQL;
1753	>	end;
1754	>
1755	>	function TIBCustomDataSet.GetSelectSQL: TStrings;
1756	>	begin
1757	>	result := FQSelect.SQL;
1758	>	end;
1759	>
1760	>	function TIBCustomDataSet.GetStatementType: TIBSQLTypes;
1761	>	begin
1762	>	result := FQSelect.SQLType;
1763	>	end;
1764	>
1765	>	function TIBCustomDataSet.GetModifySQL: TStrings;
1766	>	begin
1767	>	result := FQModify.SQL;
1768	>	end;
1769	>
1770	>	function TIBCustomDataSet.GetTransaction: TIBTransaction;
1771	>	begin
1772	>	result := FBase.Transaction;
1773	>	end;
1774	>
1775	>	function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE;
1776	>	begin
1777	>	result := FBase.TRHandle;
1778	>	end;
1779	>
1780	>	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
1781	>	begin
1782	>	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1783	>	FUpdateObject.Apply(ukDelete,Buff)
1784	>	else
1785	>	begin
1786	>	SetInternalSQLParams(FQDelete, Buff);
1787	>	FQDelete.ExecQuery;
1788	>	end;
1789	>	with PRecordData(Buff)^ do
1790	>	begin
1791	>	rdUpdateStatus := usDeleted;
1792	>	rdCachedUpdateStatus := cusUnmodified;
1793	>	end;
1794	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1795	>	end;
1796	>
1797	>	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
1798	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1799	>	var
1800	>	keyFieldList: TList;
1801	>	{$IF FPC_FULLVERSION >= 20700 }
1802	>	CurBookmark: TBookmark;
1803	>	{$ELSE}
1804	>	CurBookmark: string;
1805	>	{$ENDIF}
1806	>	fieldValue: Variant;
1807	>	lookupValues: array of variant;
1808	>	i, fieldCount: Integer;
1809	>	fieldValueAsString: string;
1810	>	lookupValueAsString: string;
1811	>	begin
1812	>	keyFieldList := TList.Create;
1813	>	try
1814	>	GetFieldList(keyFieldList, KeyFields);
1815	>	fieldCount := keyFieldList.Count;
1816	>	CurBookmark := Bookmark;
1817	>	result := false;
1818	>	SetLength(lookupValues, fieldCount);
1819	>	if not EOF then
1820	>	begin
1821	>	for i := 0 to fieldCount - 1 do  {expand key values into lookupValues array}
1822	>	begin
1823	>	if VarIsArray(KeyValues) then
1824	>	lookupValues[i] := KeyValues[i]
1825	>	else
1826	>	if i > 0 then
1827	>	lookupValues[i] := NULL
1828	>	else
1829	>	lookupValues[0] := KeyValues;
1830	>
1831	>	{convert to upper case is case insensitive search}
1832	>	if (TField(keyFieldList[i]).DataType = ftString) and
1833	>	not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
1834	>	lookupValues[i] := UpperCase(lookupValues[i]);
1835	>	end;
1836	>	end;
1837	>	while not result and not EOF do   {search for a matching record}
1838	>	begin
1839	>	i := 0;
1840	>	result := true;
1841	>	while result and (i < fieldCount) do
1842	>	{see if all of the key fields matches}
1843	>	begin
1844	>	fieldValue := TField(keyFieldList[i]).Value;
1845	>	result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
1846	>	if result and not VarIsNull(fieldValue) then
1847	>	begin
1848	>	try
1849	>	if TField(keyFieldList[i]).DataType = ftString then
1850	>	begin
1851	>	{strings need special handling because of the locate options that
1852	>	apply to them}
1853	>	fieldValueAsString := TField(keyFieldList[i]).AsString;
1854	>	lookupValueAsString := lookupValues[i];
1855	>	if (loCaseInsensitive in Options) then
1856	>	fieldValueAsString := UpperCase(fieldValueAsString);
1857	>
1858	>	if (loPartialKey in Options) then
1859	>	result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
1860	>	else
1861	>	result := result and (fieldValueAsString = lookupValueAsString);
1862	>	end
1863	>	else
1864	>	result := result and (lookupValues[i] =
1865	>	VarAsType(fieldValue, VarType(lookupValues[i])));
1866	>	except on EVariantError do
1867	>	result := False;
1868	>	end;
1869	>	end;
1870	>	Inc(i);
1871	>	end;
1872	>	if not result then
1873	>	Next;
1874	>	end;
1875	>	if not result then
1876	>	Bookmark := CurBookmark
1877	>	else
1878	>	CursorPosChanged;
1879	>	finally
1880	>	keyFieldList.Free;
1881	>	SetLength(lookupValues,0)
1882	>	end;
1883	>	end;
1884	>
1885	>	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
1886	>	var
1887	>	i, j, k: Integer;
1888	>	pbd: PBlobDataArray;
1889	>	begin
1890	>	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
1891	>	j := 0;
1892	>	for i := 0 to FieldCount - 1 do
1893	>	if Fields[i].IsBlob then
1894	>	begin
1895	>	k := FMappedFieldPosition[Fields[i].FieldNo -1];
1896	>	if pbd^[j] <> nil then
1897	>	begin
1898	>	pbd^[j].Finalize;
1899	>	PISC_QUAD(
1900	>	PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ :=
1901	>	pbd^[j].BlobID;
1902	>	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
1903	>	end;
1904	>	Inc(j);
1905	>	end;
1906	>	if Assigned(FUpdateObject) then
1907	>	begin
1908	>	if (Qry = FQDelete) then
1909	>	FUpdateObject.Apply(ukDelete,Buff)
1910	>	else if (Qry = FQInsert) then
1911	>	FUpdateObject.Apply(ukInsert,Buff)
1912	>	else
1913	>	FUpdateObject.Apply(ukModify,Buff);
1914	>	end
1915	>	else begin
1916	>	SetInternalSQLParams(Qry, Buff);
1917	>	Qry.ExecQuery;
1918	>	end;
1919	>	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
1920	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
1921	>	SetModified(False);
1922	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1923	>	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
1924	>	InternalRefreshRow;
1925	>	end;
1926	>
1927	>	procedure TIBCustomDataSet.InternalRefreshRow;
1928	>	var
1929	>	Buff: PChar;
1930	>	ofs: DWORD;
1931	>	Qry: TIBSQL;
1932	>	begin
1933	>	FBase.SetCursor;
1934	>	try
1935	>	Buff := GetActiveBuf;
1936	>	if CanRefresh then
1937	>	begin
1938	>	if Buff <> nil then
1939	>	begin
1940	>	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
1941	>	begin
1942	>	Qry := TIBSQL.Create(self);
1943	>	Qry.Database := Database;
1944	>	Qry.Transaction := Transaction;
1945	>	Qry.GoToFirstRecordOnExecute := False;
1946	>	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
1947	>	end
1948	>	else
1949	>	Qry := FQRefresh;
1950	>	SetInternalSQLParams(Qry, Buff);
1951	>	Qry.ExecQuery;
1952	>	try
1953	>	if (Qry.SQLType = SQLExecProcedure) or
1954	>	(Qry.Next <> nil) then
1955	>	begin
1956	>	ofs := PRecordData(Buff)^.rdSavedOffset;
1957	>	FetchCurrentRecordToBuffer(Qry,
1958	>	PRecordData(Buff)^.rdRecordNumber,
1959	>	Buff);
1960	>	if FCachedUpdates and (ofs <> $FFFFFFFF) then
1961	>	begin
1962	>	PRecordData(Buff)^.rdSavedOffset := ofs;
1963	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1964	>	SaveOldBuffer(Buff);
1965	>	end;
1966	>	end;
1967	>	finally
1968	>	Qry.Close;
1969	>	end;
1970	>	if Qry <> FQRefresh then
1971	>	Qry.Free;
1972	>	end
1973	>	end
1974	>	else
1975	>	IBError(ibxeCannotRefresh, [nil]);
1976	>	finally
1977	>	FBase.RestoreCursor;
1978	>	end;
1979	>	end;
1980	>
1981	>	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
1982	>	var
1983	>	NewBuffer, OldBuffer: PRecordData;
1984	>
1985	>	begin
1986	>	NewBuffer := nil;
1987	>	OldBuffer := nil;
1988	>	NewBuffer := PRecordData(AllocRecordBuffer);
1989	>	OldBuffer := PRecordData(AllocRecordBuffer);
1990	>	try
1991	>	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
1992	>	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
1993	>	case NewBuffer^.rdCachedUpdateStatus of
1994	>	cusInserted:
1995	>	begin
1996	>	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
1997	>	Inc(FDeletedRecords);
1998	>	end;
1999	>	cusModified,
2000	>	cusDeleted:
2001	>	begin
2002	>	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
2003	>	Dec(FDeletedRecords);
2004	>	CopyRecordBuffer(OldBuffer, NewBuffer);
2005	>	end;
2006	>	end;
2007	>
2008	>	if State in dsEditModes then
2009	>	Cancel;
2010	>
2011	>	WriteRecordCache(RecordNumber, PChar(NewBuffer));
2012	>
2013	>	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
2014	>	ReSync([]);
2015	>	finally
2016	>	FreeRecordBuffer(PChar(NewBuffer));
2017	>	FreeRecordBuffer(PChar(OldBuffer));
2018	>	end;
2019	>	end;
2020	>
2021	>	{ A visible record is one that is not truly deleted,
2022	>	and it is also listed in the FUpdateRecordTypes set }
2023	>
2024	>	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
2025	>	begin
2026	>	result := True;
2027	>	if not (State = dsOldValue) then
2028	>	result :=
2029	>	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
2030	>	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
2031	>	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
2032	>	end;
2033	>
2034	>
2035	>	function TIBCustomDataSet.LocateNext(const KeyFields: string;
2036	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
2037	>	begin
2038	>	DisableControls;
2039	>	try
2040	>	result := InternalLocate(KeyFields, KeyValues, Options);
2041	>	finally
2042	>	EnableControls;
2043	>	end;
2044	>	end;
2045	>
2046	>	procedure TIBCustomDataSet.InternalPrepare;
2047	>	var
2048	>	DidActivate: Boolean;
2049	>	begin
2050	>	if FInternalPrepared then
2051	>	Exit;
2052	>	DidActivate := False;
2053	>	FBase.SetCursor;
2054	>	try
2055	>	ActivateConnection;
2056	>	DidActivate := ActivateTransaction;
2057	>	FBase.CheckDatabase;
2058	>	FBase.CheckTransaction;
2059	>	if HasParser and (FParser.SQLText <> FQSelect.SQL.Text) then
2060	>	FQSelect.SQL.Text := FParser.SQLText;
2061	>	//   writeln( FQSelect.SQL.Text);
2062	>	if FQSelect.SQL.Text <> '' then
2063	>	begin
2064	>	if not FQSelect.Prepared then
2065	>	begin
2066	>	FQSelect.GenerateParamNames := FGenerateParamNames;
2067	>	FQSelect.ParamCheck := ParamCheck;
2068	>	FQSelect.Prepare;
2069	>	end;
2070	>	FQDelete.GenerateParamNames := FGenerateParamNames;
2071	>	if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
2072	>	FQDelete.Prepare;
2073	>	FQInsert.GenerateParamNames := FGenerateParamNames;
2074	>	if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
2075	>	FQInsert.Prepare;
2076	>	FQRefresh.GenerateParamNames := FGenerateParamNames;
2077	>	if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
2078	>	FQRefresh.Prepare;
2079	>	FQModify.GenerateParamNames := FGenerateParamNames;
2080	>	if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
2081	>	FQModify.Prepare;
2082	>	FInternalPrepared := True;
2083	>	InternalInitFieldDefs;
2084	>	end else
2085	>	IBError(ibxeEmptyQuery, [nil]);
2086	>	finally
2087	>	if DidActivate then
2088	>	DeactivateTransaction;
2089	>	FBase.RestoreCursor;
2090	>	end;
2091	>	end;
2092	>
2093	>	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
2094	>	begin
2095	>	SetModified(Value);
2096	>	end;
2097	>
2098	>	procedure TIBCustomDataSet.RevertRecord;
2099	>	var
2100	>	Buff: PRecordData;
2101	>	begin
2102	>	if FCachedUpdates and FUpdatesPending then
2103	>	begin
2104	>	Buff := PRecordData(GetActiveBuf);
2105	>	InternalRevertRecord(Buff^.rdRecordNumber);
2106	>	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
2107	>	DataEvent(deRecordChange, 0);
2108	>	end;
2109	>	end;
2110	>
2111	>	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
2112	>	var
2113	>	OldBuffer: Pointer;
2114	>	procedure CopyOldBuffer;
2115	>	begin
2116	>	CopyRecordBuffer(Buffer, OldBuffer);
2117	>	if BlobFieldCount > 0 then
2118	>	FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream),
2119	>	0);
2120	>	end;
2121	>
2122	>	begin
2123	>	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
2124	>	begin
2125	>	OldBuffer := AllocRecordBuffer;
2126	>	try
2127	>	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
2128	>	begin
2129	>	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
2130	>	FILE_END);
2131	>	CopyOldBuffer;
2132	>	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
2133	>	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
2134	>	FILE_BEGIN, Buffer);
2135	>	end
2136	>	else begin
2137	>	CopyOldBuffer;
2138	>	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2139	>	OldBuffer);
2140	>	end;
2141	>	finally
2142	>	FreeRecordBuffer(PChar(OldBuffer));
2143	>	end;
2144	>	end;
2145	>	end;
2146	>
2147	>	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
2148	>	begin
2149	>	if (Value <= 0) then
2150	>	FBufferChunks := BufferCacheSize
2151	>	else
2152	>	FBufferChunks := Value;
2153	>	end;
2154	>
2155	>	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
2156	>	begin
2157	>	if (FBase.Database <> Value) then
2158	>	begin
2159	>	CheckDatasetClosed;
2160	>	FBase.Database := Value;
2161	>	FQDelete.Database := Value;
2162	>	FQInsert.Database := Value;
2163	>	FQRefresh.Database := Value;
2164	>	FQSelect.Database := Value;
2165	>	FQModify.Database := Value;
2166	>	end;
2167	>	end;
2168	>
2169	>	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
2170	>	begin
2171	>	if FQDelete.SQL.Text <> Value.Text then
2172	>	begin
2173	>	Disconnect;
2174	>	FQDelete.SQL.Assign(Value);
2175	>	end;
2176	>	end;
2177	>
2178	>	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
2179	>	begin
2180	>	if FQInsert.SQL.Text <> Value.Text then
2181	>	begin
2182	>	Disconnect;
2183	>	FQInsert.SQL.Assign(Value);
2184	>	end;
2185	>	end;
2186	>
2187	>	procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
2188	>	var
2189	>	i, j: Integer;
2190	>	cr, data: PChar;
2191	>	fn, st: string;
2192	>	OldBuffer: Pointer;
2193	>	ts: TTimeStamp;
2194	>	begin
2195	>	if (Buffer = nil) then
2196	>	IBError(ibxeBufferNotSet, [nil]);
2197	>	if (not FInternalPrepared) then
2198	>	InternalPrepare;
2199	>	OldBuffer := nil;
2200	>	try
2201	>	for i := 0 to Qry.Params.Count - 1 do
2202	>	begin
2203	>	fn := Qry.Params[i].Name;
2204	>	if (Pos('OLD_', fn) = 1) then {mbcs ok}
2205	>	begin
2206	>	fn := Copy(fn, 5, Length(fn));
2207	>	if not Assigned(OldBuffer) then
2208	>	begin
2209	>	OldBuffer := AllocRecordBuffer;
2210	>	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
2211	>	end;
2212	>	cr := OldBuffer;
2213	>	end
2214	>	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
2215	>	begin
2216	>	fn := Copy(fn, 5, Length(fn));
2217	>	cr := Buffer;
2218	>	end
2219	>	else
2220	>	cr := Buffer;
2221	>	j := FQSelect.FieldIndex[fn] + 1;
2222	>	if (j > 0) then
2223	>	with PRecordData(cr)^ do
2224	>	begin
2225	>	if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize}
2226	>	begin
2227	>	PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey;
2228	>	continue;
2229	>	end;
2230	>	if rdFields[j].fdIsNull then
2231	>	Qry.Params[i].IsNull := True
2232	>	else begin
2233	>	Qry.Params[i].IsNull := False;
2234	>	data := cr + rdFields[j].fdDataOfs;
2235	>	case rdFields[j].fdDataType of
2236	>	SQL_TEXT, SQL_VARYING:
2237	>	begin
2238	>	SetString(st, data, rdFields[j].fdDataLength);
2239	>	Qry.Params[i].AsString := st;
2240	>	end;
2241	>	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
2242	>	Qry.Params[i].AsDouble := PDouble(data)^;
2243	>	SQL_SHORT, SQL_LONG:
2244	>	begin
2245	>	if rdFields[j].fdDataScale = 0 then
2246	>	Qry.Params[i].AsLong := PLong(data)^
2247	>	else if rdFields[j].fdDataScale >= (-4) then
2248	>	Qry.Params[i].AsCurrency := PCurrency(data)^
2249	>	else
2250	>	Qry.Params[i].AsDouble := PDouble(data)^;
2251	>	end;
2252	>	SQL_INT64:
2253	>	begin
2254	>	if rdFields[j].fdDataScale = 0 then
2255	>	Qry.Params[i].AsInt64 := PInt64(data)^
2256	>	else if rdFields[j].fdDataScale >= (-4) then
2257	>	Qry.Params[i].AsCurrency := PCurrency(data)^
2258	>	else
2259	>	Qry.Params[i].AsDouble := PDouble(data)^;
2260	>	end;
2261	>	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
2262	>	Qry.Params[i].AsQuad := PISC_QUAD(data)^;
2263	>	SQL_TYPE_DATE:
2264	>	begin
2265	>	ts.Date := PInt(data)^;
2266	>	ts.Time := 0;
2267	>	Qry.Params[i].AsDate :=
2268	>	TimeStampToDateTime(ts);
2269	>	end;
2270	>	SQL_TYPE_TIME:
2271	>	begin
2272	>	ts.Date := 0;
2273	>	ts.Time := PInt(data)^;
2274	>	Qry.Params[i].AsTime :=
2275	>	TimeStampToDateTime(ts);
2276	>	end;
2277	>	SQL_TIMESTAMP:
2278	>	Qry.Params[i].AsDateTime :=
2279	>	TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^)));
2280	>	SQL_BOOLEAN:
2281	>	Qry.Params[i].AsBoolean := PWordBool(data)^;
2282	>	end;
2283	>	end;
2284	>	end;
2285	>	end;
2286	>	finally
2287	>	if (OldBuffer <> nil) then
2288	>	FreeRecordBuffer(PChar(OldBuffer));
2289	>	end;
2290	>	end;
2291	>
2292	>	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2293	>	begin
2294	>	if FQRefresh.SQL.Text <> Value.Text then
2295	>	begin
2296	>	Disconnect;
2297	>	FQRefresh.SQL.Assign(Value);
2298	>	end;
2299	>	end;
2300	>
2301	>	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2302	>	begin
2303	>	if FQSelect.SQL.Text <> Value.Text then
2304	>	begin
2305	>	Disconnect;
2306	>	FQSelect.SQL.Assign(Value);
2307	>	FBaseSQLSelect.assign(Value);
2308	>	end;
2309	>	end;
2310	>
2311	>	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2312	>	begin
2313	>	if FQModify.SQL.Text <> Value.Text then
2314	>	begin
2315	>	Disconnect;
2316	>	FQModify.SQL.Assign(Value);
2317	>	end;
2318	>	end;
2319	>
2320	>	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2321	>	begin
2322	>	if (FBase.Transaction <> Value) then
2323	>	begin
2324	>	CheckDatasetClosed;
2325	>	FBase.Transaction := Value;
2326	>	FQDelete.Transaction := Value;
2327	>	FQInsert.Transaction := Value;
2328	>	FQRefresh.Transaction := Value;
2329	>	FQSelect.Transaction := Value;
2330	>	FQModify.Transaction := Value;
2331	>	end;
2332	>	end;
2333	>
2334	>	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2335	>	begin
2336	>	CheckDatasetClosed;
2337	>	FUniDirectional := Value;
2338	>	end;
2339	>
2340	>	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2341	>	begin
2342	>	FUpdateRecordTypes := Value;
2343	>	if Active then
2344	>	First;
2345	>	end;
2346	>
2347	>	procedure TIBCustomDataSet.RefreshParams;
2348	>	var
2349	>	DataSet: TDataSet;
2350	>	begin
2351	>	DisableControls;
2352	>	try
2353	>	if FDataLink.DataSource <> nil then
2354	>	begin
2355	>	DataSet := FDataLink.DataSource.DataSet;
2356	>	if DataSet <> nil then
2357	>	if DataSet.Active and (DataSet.State <> dsSetKey) then
2358	>	begin
2359	>	Close;
2360	>	Open;
2361	>	end;
2362	>	end;
2363	>	finally
2364	>	EnableControls;
2365	>	end;
2366	>	end;
2367	>
2368	>	procedure TIBCustomDataSet.RegisterIBLink(Sender: TIBControlLink);
2369	>	begin
2370	>	if FIBLinks.IndexOf(Sender) = -1 then
2371	>	FIBLinks.Add(Sender);
2372	>	end;
2373	>
2374	>
2375	>	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2376	>	begin
2377	>	Active := false;
2378	>	{  if FOpen then
2379	>	InternalClose;}
2380	>	if FInternalPrepared then
2381	>	InternalUnPrepare;
2382	>	FieldDefs.Clear;
2383	>	FieldDefs.Updated := false;
2384	>	end;
2385	>
2386	>	{ I can "undelete" uninserted records (make them "inserted" again).
2387	>	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2388	>	procedure TIBCustomDataSet.Undelete;
2389	>	var
2390	>	Buff: PRecordData;
2391	>	begin
2392	>	CheckActive;
2393	>	Buff := PRecordData(GetActiveBuf);
2394	>	with Buff^ do
2395	>	begin
2396	>	if rdCachedUpdateStatus = cusUninserted then
2397	>	begin
2398	>	rdCachedUpdateStatus := cusInserted;
2399	>	Dec(FDeletedRecords);
2400	>	end
2401	>	else if (rdUpdateStatus = usDeleted) and
2402	>	(rdCachedUpdateStatus = cusDeleted) then
2403	>	begin
2404	>	rdCachedUpdateStatus := cusUnmodified;
2405	>	rdUpdateStatus := usUnmodified;
2406	>	Dec(FDeletedRecords);
2407	>	end;
2408	>	WriteRecordCache(rdRecordNumber, PChar(Buff));
2409	>	end;
2410	>	end;
2411	>
2412	>	procedure TIBCustomDataSet.UnRegisterIBLink(Sender: TIBControlLink);
2413	>	begin
2414	>	FIBLinks.Remove(Sender);
2415	>	end;
2416	>
2417	>	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2418	>	begin
2419	>	if Active then
2420	>	if GetActiveBuf <> nil then
2421	>	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2422	>	else
2423	>	result := usUnmodified
2424	>	else
2425	>	result := usUnmodified;
2426	>	end;
2427	>
2428	>	function TIBCustomDataSet.IsSequenced: Boolean;
2429	>	begin
2430	>	Result := Assigned( FQSelect ) and FQSelect.EOF;
2431	>	end;
2432	>
2433	>	function TIBCustomDataSet.ParamByName(ParamName: String): TIBXSQLVAR;
2434	>	begin
2435	>	ActivateConnection;
2436	>	ActivateTransaction;
2437	>	if not FInternalPrepared then
2438	>	InternalPrepare;
2439	>	Result := Params.ByName(ParamName);
2440	>	end;
2441	>
2442	>	{Beware: the parameter FCache is used as an identifier to determine which
2443	>	cache is being operated on and is not referenced in the computation.
2444	>	The result is an adjusted offset into the identified cache, either the
2445	>	Buffer Cache or the old Buffer Cache.}
2446	>
2447	>	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
2448	>	Origin: Integer): DWORD;
2449	>	var
2450	>	OldCacheSize: Integer;
2451	>	begin
2452	>	if (FCache = FBufferCache) then
2453	>	begin
2454	>	case Origin of
2455	>	FILE_BEGIN:    FBPos := Offset;
2456	>	FILE_CURRENT:  FBPos := FBPos + Offset;
2457	>	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
2458	>	end;
2459	>	OldCacheSize := FCacheSize;
2460	>	while (FBPos >= DWORD(FCacheSize)) do
2461	>	Inc(FCacheSize, FBufferChunkSize);
2462	>	if FCacheSize > OldCacheSize then
2463	>	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
2464	>	result := FBPos;
2465	>	end
2466	>	else begin
2467	>	case Origin of
2468	>	FILE_BEGIN:    FOBPos := Offset;
2469	>	FILE_CURRENT:  FOBPos := FOBPos + Offset;
2470	>	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
2471	>	end;
2472	>	OldCacheSize := FOldCacheSize;
2473	>	while (FBPos >= DWORD(FOldCacheSize)) do
2474	>	Inc(FOldCacheSize, FBufferChunkSize);
2475	>	if FOldCacheSize > OldCacheSize then
2476	>	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
2477	>	result := FOBPos;
2478	>	end;
2479	>	end;
2480	>
2481	>	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2482	>	Buffer: PChar);
2483	>	var
2484	>	pCache: PChar;
2485	>	AdjustedOffset: DWORD;
2486	>	bOld: Boolean;
2487	>	begin
2488	>	bOld := (FCache = FOldBufferCache);
2489	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2490	>	if not bOld then
2491	>	pCache := FBufferCache + AdjustedOffset
2492	>	else
2493	>	pCache := FOldBufferCache + AdjustedOffset;
2494	>	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
2495	>	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2496	>	end;
2497	>
2498	>	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
2499	>	ReadOldBuffer: Boolean);
2500	>	begin
2501	>	if FUniDirectional then
2502	>	RecordNumber := RecordNumber mod UniCache;
2503	>	if (ReadOldBuffer) then
2504	>	begin
2505	>	ReadRecordCache(RecordNumber, Buffer, False);
2506	>	if FCachedUpdates and
2507	>	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
2508	>	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2509	>	Buffer)
2510	>	else
2511	>	if ReadOldBuffer and
2512	>	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
2513	>	CopyRecordBuffer( FOldBuffer, Buffer )
2514	>	end
2515	>	else
2516	>	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2517	>	end;
2518	>
2519	>	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2520	>	Buffer: PChar);
2521	>	var
2522	>	pCache: PChar;
2523	>	AdjustedOffset: DWORD;
2524	>	bOld: Boolean;
2525	>	dwEnd: DWORD;
2526	>	begin
2527	>	bOld := (FCache = FOldBufferCache);
2528	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2529	>	if not bOld then
2530	>	pCache := FBufferCache + AdjustedOffset
2531	>	else
2532	>	pCache := FOldBufferCache + AdjustedOffset;
2533	>	Move(Buffer^, pCache^, FRecordBufferSize);
2534	>	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2535	>	if not bOld then
2536	>	begin
2537	>	if (dwEnd > FBEnd) then
2538	>	FBEnd := dwEnd;
2539	>	end
2540	>	else begin
2541	>	if (dwEnd > FOBEnd) then
2542	>	FOBEnd := dwEnd;
2543	>	end;
2544	>	end;
2545	>
2546	>	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
2547	>	begin
2548	>	if RecordNumber >= 0 then
2549	>	begin
2550	>	if FUniDirectional then
2551	>	RecordNumber := RecordNumber mod UniCache;
2552	>	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2553	>	end;
2554	>	end;
2555	>
2556	>	function TIBCustomDataSet.AllocRecordBuffer: PChar;
2557	>	begin
2558	>	result := nil;
2559	>	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
2560	>	Move(FModelBuffer^, result^, FRecordBufferSize);
2561	>	end;
2562	>
2563	>	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
2564	>	var
2565	>	pb: PBlobDataArray;
2566	>	fs: TIBBlobStream;
2567	>	Buff: PChar;
2568	>	bTr, bDB: Boolean;
2569	>	begin
2570	>	Buff := GetActiveBuf;
2571	>	if Buff = nil then
2572	>	begin
2573	>	fs := TIBBlobStream.Create;
2574	>	fs.Mode := bmReadWrite;
2575	>	FBlobStreamList.Add(Pointer(fs));
2576	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
2577	>	exit;
2578	>	end;
2579	>	pb := PBlobDataArray(Buff + FBlobCacheOffset);
2580	>	if pb^[Field.Offset] = nil then
2581	>	begin
2582	>	AdjustRecordOnInsert(Buff);
2583	>	pb^[Field.Offset] := TIBBlobStream.Create;
2584	>	fs := pb^[Field.Offset];
2585	>	FBlobStreamList.Add(Pointer(fs));
2586	>	fs.Mode := bmReadWrite;
2587	>	fs.Database := Database;
2588	>	fs.Transaction := Transaction;
2589	>	fs.BlobID :=
2590	>	PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
2591	>	if (CachedUpdates) then
2592	>	begin
2593	>	bTr := not Transaction.InTransaction;
2594	>	bDB := not Database.Connected;
2595	>	if bDB then
2596	>	Database.Open;
2597	>	if bTr then
2598	>	Transaction.StartTransaction;
2599	>	fs.Seek(0, soFromBeginning);
2600	>	if bTr then
2601	>	Transaction.Commit;
2602	>	if bDB then
2603	>	Database.Close;
2604	>	end;
2605	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
2606	>	end else
2607	>	fs := pb^[Field.Offset];
2608	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
2609	>	end;
2610	>
2611	>	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
2612	>	const
2613	>	CMPLess = -1;
2614	>	CMPEql  =  0;
2615	>	CMPGtr  =  1;
2616	>	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
2617	>	(CMPGtr, CMPEql));
2618	>	begin
2619	>	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
2620	>
2621	>	if Result = 2 then
2622	>	begin
2623	>	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
2624	>	Result := CMPLess
2625	>	else
2626	>	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
2627	>	Result := CMPGtr
2628	>	else
2629	>	Result := CMPEql;
2630	>	end;
2631	>	end;
2632	>
2633	>	procedure TIBCustomDataSet.DoBeforeDelete;
2634	>	var
2635	>	Buff: PRecordData;
2636	>	begin
2637	>	if not CanDelete then
2638	>	IBError(ibxeCannotDelete, [nil]);
2639	>	Buff := PRecordData(GetActiveBuf);
2640	>	if FCachedUpdates and
2641	>	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
2642	>	SaveOldBuffer(PChar(Buff));
2643	>	inherited DoBeforeDelete;
2644	>	end;
2645	>
2646	>	procedure TIBCustomDataSet.DoAfterDelete;
2647	>	begin
2648	>	inherited DoAfterDelete;
2649	>	FBase.DoAfterDelete(self);
2650	>	InternalAutoCommit;
2651	>	end;
2652	>
2653	>	procedure TIBCustomDataSet.DoBeforeEdit;
2654	>	var
2655	>	Buff: PRecordData;
2656	>	begin
2657	>	Buff := PRecordData(GetActiveBuf);
2658	>	if not(CanEdit or (FQModify.SQL.Count <> 0) or
2659	>	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
2660	>	IBError(ibxeCannotUpdate, [nil]);
2661	>	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
2662	>	SaveOldBuffer(PChar(Buff));
2663	>	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
2664	>	inherited DoBeforeEdit;
2665	>	end;
2666	>
2667	>	procedure TIBCustomDataSet.DoAfterEdit;
2668	>	begin
2669	>	inherited DoAfterEdit;
2670	>	FBase.DoAfterEdit(self);
2671	>	end;
2672	>
2673	>	procedure TIBCustomDataSet.DoBeforeInsert;
2674	>	begin
2675	>	if not CanInsert then
2676	>	IBError(ibxeCannotInsert, [nil]);
2677	>	inherited DoBeforeInsert;
2678	>	end;
2679	>
2680	>	procedure TIBCustomDataSet.DoAfterInsert;
2681	>	begin
2682	>	if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
2683	>	GeneratorField.Apply;
2684	>	inherited DoAfterInsert;
2685	>	FBase.DoAfterInsert(self);
2686	>	end;
2687	>
2688	>	procedure TIBCustomDataSet.DoBeforeClose;
2689	>	begin
2690	>	inherited DoBeforeClose;
2691	>	if State in [dsInsert,dsEdit] then
2692	>	begin
2693	>	if FInTransactionEnd and (FCloseAction = TARollback) then
2694	>	Exit;
2695	>
2696	>	if DataSetCloseAction = dcSaveChanges then
2697	>	Post;
2698	>	{Note this can fail with an exception e.g. due to
2699	>	database validation error. In which case the dataset remains open }
2700	>	end;
2701	>	end;
2702	>
2703	>	procedure TIBCustomDataSet.DoBeforeOpen;
2704	>	var i: integer;
2705	>	begin
2706	>	if assigned(FParser) then
2707	>	FParser.Reset;
2708	>	for i := 0 to FIBLinks.Count - 1 do
2709	>	TIBControlLink(FIBLinks[i]).UpdateSQL(self);
2710	>	inherited DoBeforeOpen;
2711	>	for i := 0 to FIBLinks.Count - 1 do
2712	>	TIBControlLink(FIBLinks[i]).UpdateParams(self);
2713	>	end;
2714	>
2715	>	procedure TIBCustomDataSet.DoBeforePost;
2716	>	begin
2717	>	inherited DoBeforePost;
2718	>	if (State = dsInsert) and
2719	>	(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
2720	>	GeneratorField.Apply
2721	>	end;
2722	>
2723	>	procedure TIBCustomDataSet.DoAfterPost;
2724	>	begin
2725	>	inherited DoAfterPost;
2726	>	FBase.DoAfterPost(self);
2727	>	InternalAutoCommit;
2728	>	end;
2729	>
2730	>	procedure TIBCustomDataSet.FetchAll;
2731	>	var
2732	>	{$IF FPC_FULLVERSION >= 20700 }
2733	>	CurBookmark: TBookmark;
2734	>	{$ELSE}
2735	>	CurBookmark: string;
2736	>	{$ENDIF}
2737	>	begin
2738	>	FBase.SetCursor;
2739	>	try
2740	>	if FQSelect.EOF or not FQSelect.Open then
2741	>	exit;
2742	>	DisableControls;
2743	>	try
2744	>	CurBookmark := Bookmark;
2745	>	Last;
2746	>	Bookmark := CurBookmark;
2747	>	finally
2748	>	EnableControls;
2749	>	end;
2750	>	finally
2751	>	FBase.RestoreCursor;
2752	>	end;
2753	>	end;
2754	>
2755	>	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
2756	>	begin
2757	>	FreeMem(Buffer);
2758	>	Buffer := nil;
2759	>	end;
2760	>
2761	>	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
2762	>	begin
2763	>	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
2764	>	end;
2765	>
2766	>	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
2767	>	begin
2768	>	result := PRecordData(Buffer)^.rdBookmarkFlag;
2769	>	end;
2770	>
2771	>	function TIBCustomDataSet.GetCanModify: Boolean;
2772	>	begin
2773	>	result := (FQInsert.SQL.Text <> '') or
2774	>	(FQModify.SQL.Text <> '') or
2775	>	(FQDelete.SQL.Text <> '') or
2776	>	(Assigned(FUpdateObject));
2777	>	end;
2778	>
2779	>	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
2780	>	begin
2781	>	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
2782	>	begin
2783	>	UpdateCursorPos;
2784	>	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
2785	>	result := True;
2786	>	end
2787	>	else
2788	>	result := False;
2789	>	end;
2790	>
2791	>	function TIBCustomDataSet.GetDataSource: TDataSource;
2792	>	begin
2793	>	if FDataLink = nil then
2794	>	result := nil
2795	>	else
2796	>	result := FDataLink.DataSource;
2797	>	end;
2798	>
2799	>	function TIBCustomDataSet.GetDBAliasName(FieldNo: integer): string;
2800	>	begin
2801	>	Result := FAliasNameMap[FieldNo-1]
2802	>	end;
2803	>
2804	>	function TIBCustomDataSet.GetFieldDefFromAlias(aliasName: string): TFieldDef;
2805	>	var
2806	>	i: integer;
2807	>	begin
2808	>	Result := nil;
2809	>	for i := 0 to Length(FAliasNameMap) - 1 do
2810	>	if FAliasNameMap[i] = aliasName then
2811	>	begin
2812	>	Result := FieldDefs[i];
2813	>	Exit
2814	>	end;
2815	>	end;
2816	>
2817	>	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
2818	>	begin
2819	>	Result := DefaultFieldClasses[FieldType];
2820	>	end;
2821	>
2822	>	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
2823	>	begin
2824	>	result := GetFieldData(FieldByNumber(FieldNo), buffer);
2825	>	end;
2826	>
2827	>	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
2828	>	var
2829	>	Buff, Data: PChar;
2830	>	CurrentRecord: PRecordData;
2831	>	begin
2832	>	result := False;
2833	>	Buff := GetActiveBuf;
2834	>	if (Buff = nil) or
2835	>	(not IsVisible(Buff)) or not assigned(Field.DataSet) then
2836	>	exit;
2837	>	{ The intention here is to stuff the buffer with the data for the
2838	>	referenced field for the current record }
2839	>	CurrentRecord := PRecordData(Buff);
2840	>	if (Field.FieldNo < 0) then
2841	>	begin
2842	>	Inc(Buff, FRecordSize + Field.Offset);
2843	>	result := Boolean(Buff[0]);
2844	>	if result and (Buffer <> nil) then
2845	>	Move(Buff[1], Buffer^, Field.DataSize);
2846	>	end
2847	>	else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
2848	>	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
2849	>	begin
2850	>	result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull;
2851	>	if result and (Buffer <> nil) then
2852	>	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do
2853	>	begin
2854	>	Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs;
2855	>	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
2856	>	begin
2857	>	if fdDataLength < Field.DataSize then
2858	>	begin
2859	>	Move(Data^, Buffer^, fdDataLength);
2860	>	PChar(Buffer)[fdDataLength] := #0;
2861	>	end
2862	>	else
2863	>	IBError(ibxeFieldSizeError,[Field.FieldName])
2864	>	end
2865	>	else
2866	>	Move(Data^, Buffer^, Field.DataSize);
2867	>	end;
2868	>	end;
2869	>	end;
2870	>
2871	>	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
2872	>	opposed to 0-based indexes.
2873	>	This is because we want LastRecordNumber/RecordCount = 1 }
2874	>
2875	>	function TIBCustomDataSet.GetRecNo: Integer;
2876	>	begin
2877	>	if GetActiveBuf = nil then
2878	>	result := 0
2879	>	else
2880	>	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
2881	>	end;
2882	>
2883	>	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
2884	>	DoCheck: Boolean): TGetResult;
2885	>	var
2886	>	Accept: Boolean;
2887	>	SaveState: TDataSetState;
2888	>	begin
2889	>	Result := grOK;
2890	>	if Filtered and Assigned(OnFilterRecord) then
2891	>	begin
2892	>	Accept := False;
2893	>	SaveState := SetTempState(dsFilter);
2894	>	while not Accept do
2895	>	begin
2896	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2897	>	if Result <> grOK then
2898	>	break;
2899	>	FFilterBuffer := Buffer;
2900	>	try
2901	>	Accept := True;
2902	>	OnFilterRecord(Self, Accept);
2903	>	if not Accept and (GetMode = gmCurrent) then
2904	>	GetMode := gmPrior;
2905	>	except
2906	>	//        FBase.HandleException(Self);
2907	>	end;
2908	>	end;
2909	>	RestoreState(SaveState);
2910	>	end
2911	>	else
2912	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2913	>	end;
2914	>
2915	>	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
2916	>	DoCheck: Boolean): TGetResult;
2917	>	begin
2918	>	result := grError;
2919	>	case GetMode of
2920	>	gmCurrent: begin
2921	>	if (FCurrentRecord >= 0) then begin
2922	>	if FCurrentRecord < FRecordCount then
2923	>	ReadRecordCache(FCurrentRecord, Buffer, False)
2924	>	else begin
2925	>	while (not FQSelect.EOF) and
2926	>	(FQSelect.Next <> nil) and
2927	>	(FCurrentRecord >= FRecordCount) do begin
2928	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
2929	>	Inc(FRecordCount);
2930	>	end;
2931	>	FCurrentRecord := FRecordCount - 1;
2932	>	if (FCurrentRecord >= 0) then
2933	>	ReadRecordCache(FCurrentRecord, Buffer, False);
2934	>	end;
2935	>	result := grOk;
2936	>	end else
2937	>	result := grBOF;
2938	>	end;
2939	>	gmNext: begin
2940	>	result := grOk;
2941	>	if FCurrentRecord = FRecordCount then
2942	>	result := grEOF
2943	>	else if FCurrentRecord = FRecordCount - 1 then begin
2944	>	if (not FQSelect.EOF) then begin
2945	>	FQSelect.Next;
2946	>	Inc(FCurrentRecord);
2947	>	end;
2948	>	if (FQSelect.EOF) then begin
2949	>	result := grEOF;
2950	>	end else begin
2951	>	Inc(FRecordCount);
2952	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
2953	>	end;
2954	>	end else if (FCurrentRecord < FRecordCount) then begin
2955	>	Inc(FCurrentRecord);
2956	>	ReadRecordCache(FCurrentRecord, Buffer, False);
2957	>	end;
2958	>	end;
2959	>	else { gmPrior }
2960	>	begin
2961	>	if (FCurrentRecord = 0) then begin
2962	>	Dec(FCurrentRecord);
2963	>	result := grBOF;
2964	>	end else if (FCurrentRecord > 0) and
2965	>	(FCurrentRecord <= FRecordCount) then begin
2966	>	Dec(FCurrentRecord);
2967	>	ReadRecordCache(FCurrentRecord, Buffer, False);
2968	>	result := grOk;
2969	>	end else if (FCurrentRecord = -1) then
2970	>	result := grBOF;
2971	>	end;
2972	>	end;
2973	>	if result = grOk then
2974	>	result := AdjustCurrentRecord(Buffer, GetMode);
2975	>	if result = grOk then with PRecordData(Buffer)^ do begin
2976	>	rdBookmarkFlag := bfCurrent;
2977	>	GetCalcFields(Buffer);
2978	>	end else if (result = grEOF) then begin
2979	>	CopyRecordBuffer(FModelBuffer, Buffer);
2980	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2981	>	end else if (result = grBOF) then begin
2982	>	CopyRecordBuffer(FModelBuffer, Buffer);
2983	>	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
2984	>	end else if (result = grError) then begin
2985	>	CopyRecordBuffer(FModelBuffer, Buffer);
2986	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2987	>	end;;
2988	>	end;
2989	>
2990	>	function TIBCustomDataSet.GetRecordCount: Integer;
2991	>	begin
2992	>	result := FRecordCount - FDeletedRecords;
2993	>	end;
2994	>
2995	>	function TIBCustomDataSet.GetRecordSize: Word;
2996	>	begin
2997	>	result := FRecordBufferSize;
2998	>	end;
2999	>
3000	>	procedure TIBCustomDataSet.InternalAutoCommit;
3001	>	begin
3002	>	with Transaction do
3003	>	if InTransaction and (FAutoCommit = acCommitRetaining) then
3004	>	begin
3005	>	if CachedUpdates then ApplyUpdates;
3006	>	CommitRetaining;
3007	>	end;
3008	>	end;
3009	>
3010	>	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
3011	>	begin
3012	>	CheckEditState;
3013	>	begin
3014	>	{ When adding records, we *always* append.
3015	>	Insertion is just too costly }
3016	>	AdjustRecordOnInsert(Buffer);
3017	>	with PRecordData(Buffer)^ do
3018	>	begin
3019	>	rdUpdateStatus := usInserted;
3020	>	rdCachedUpdateStatus := cusInserted;
3021	>	end;
3022	>	if not CachedUpdates then
3023	>	InternalPostRecord(FQInsert, Buffer)
3024	>	else begin
3025	>	WriteRecordCache(FCurrentRecord, Buffer);
3026	>	FUpdatesPending := True;
3027	>	end;
3028	>	Inc(FRecordCount);
3029	>	InternalSetToRecord(Buffer);
3030	>	end
3031	>	end;
3032	>
3033	>	procedure TIBCustomDataSet.InternalCancel;
3034	>	var
3035	>	Buff: PChar;
3036	>	CurRec: Integer;
3037	>	begin
3038	>	inherited InternalCancel;
3039	>	Buff := GetActiveBuf;
3040	>	if Buff <> nil then begin
3041	>	CurRec := FCurrentRecord;
3042	>	AdjustRecordOnInsert(Buff);
3043	>	if (State = dsEdit) then begin
3044	>	CopyRecordBuffer(FOldBuffer, Buff);
3045	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3046	>	end else begin
3047	>	CopyRecordBuffer(FModelBuffer, Buff);
3048	>	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
3049	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
3050	>	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
3051	>	FCurrentRecord := CurRec;
3052	>	end;
3053	>	end;
3054	>	end;
3055	>
3056	>
3057	>	procedure TIBCustomDataSet.InternalClose;
3058	>	begin
3059	>	if FDidActivate then
3060	>	DeactivateTransaction;
3061	>	FQSelect.Close;
3062	>	ClearBlobCache;
3063	>	FreeRecordBuffer(FModelBuffer);
3064	>	FreeRecordBuffer(FOldBuffer);
3065	>	FCurrentRecord := -1;
3066	>	FOpen := False;
3067	>	FRecordCount := 0;
3068	>	FDeletedRecords := 0;
3069	>	FRecordSize := 0;
3070	>	FBPos := 0;
3071	>	FOBPos := 0;
3072	>	FCacheSize := 0;
3073	>	FOldCacheSize := 0;
3074	>	FBEnd := 0;
3075	>	FOBEnd := 0;
3076	>	FreeMem(FBufferCache);
3077	>	FBufferCache := nil;
3078	>	FreeMem(FOldBufferCache);
3079	>	FOldBufferCache := nil;
3080	>	BindFields(False);
3081	>	if DefaultFields then DestroyFields;
3082	>	end;
3083	>
3084	>	procedure TIBCustomDataSet.InternalDelete;
3085	>	var
3086	>	Buff: PChar;
3087	>	begin
3088	>	FBase.SetCursor;
3089	>	try
3090	>	Buff := GetActiveBuf;
3091	>	if CanDelete then
3092	>	begin
3093	>	if not CachedUpdates then
3094	>	InternalDeleteRecord(FQDelete, Buff)
3095	>	else
3096	>	begin
3097	>	with PRecordData(Buff)^ do
3098	>	begin
3099	>	if rdCachedUpdateStatus = cusInserted then
3100	>	rdCachedUpdateStatus := cusUninserted
3101	>	else begin
3102	>	rdUpdateStatus := usDeleted;
3103	>	rdCachedUpdateStatus := cusDeleted;
3104	>	end;
3105	>	end;
3106	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3107	>	end;
3108	>	Inc(FDeletedRecords);
3109	>	FUpdatesPending := True;
3110	>	end else
3111	>	IBError(ibxeCannotDelete, [nil]);
3112	>	finally
3113	>	FBase.RestoreCursor;
3114	>	end;
3115	>	end;
3116	>
3117	>	procedure TIBCustomDataSet.InternalFirst;
3118	>	begin
3119	>	FCurrentRecord := -1;
3120	>	end;
3121	>
3122	>	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
3123	>	begin
3124	>	FCurrentRecord := PInteger(Bookmark)^;
3125	>	end;
3126	>
3127	>	procedure TIBCustomDataSet.InternalHandleException;
3128	>	begin
3129	>	FBase.HandleException(Self)
3130	>	end;
3131	>
3132	>	procedure TIBCustomDataSet.InternalInitFieldDefs;
3133	>	begin
3134	>	if not InternalPrepared then
3135	>	begin
3136	>	InternalPrepare;
3137	>	exit;
3138	>	end;
3139	>	FieldDefsFromQuery(FQSelect);
3140	>	end;
3141	>
3142	>	procedure TIBCustomDataSet.FieldDefsFromQuery(SourceQuery: TIBSQL);
3143	>	const
3144	>	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
3145	>	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
3146	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
3147	>	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
3148	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
3149	>	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
3150	>	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
3151	>	var
3152	>	FieldType: TFieldType;
3153	>	FieldSize: Word;
3154	>	CharSetSize: integer;
3155	>	FieldNullable : Boolean;
3156	>	i, FieldPosition, FieldPrecision: Integer;
3157	>	FieldAliasName, DBAliasName: string;
3158	>	RelationName, FieldName: string;
3159	>	Query : TIBSQL;
3160	>	FieldIndex: Integer;
3161	>	FRelationNodes : TRelationNode;
3162	>
3163	>	function Add_Node(Relation, Field : String) : TRelationNode;
3164	>	var
3165	>	FField : TFieldNode;
3166	>	begin
3167	>	if FRelationNodes.RelationName = '' then
3168	>	Result := FRelationNodes
3169	>	else
3170	>	begin
3171	>	Result := TRelationNode.Create;
3172	>	Result.NextRelation := FRelationNodes;
3173	>	end;
3174	>	Result.RelationName := Relation;
3175	>	FRelationNodes := Result;
3176	>	Query.Params[0].AsString := Relation;
3177	>	Query.ExecQuery;
3178	>	while not Query.Eof do
3179	>	begin
3180	>	FField := TFieldNode.Create;
3181	>	FField.FieldName := Query.Fields[2].AsString;
3182	>	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
3183	>	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
3184	>	FField.NextField := Result.FieldNodes;
3185	>	Result.FieldNodes := FField;
3186	>	Query.Next;
3187	>	end;
3188	>	Query.Close;
3189	>	end;
3190	>
3191	>	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
3192	>	var
3193	>	FRelation : TRelationNode;
3194	>	FField : TFieldNode;
3195	>	begin
3196	>	FRelation := FRelationNodes;
3197	>	while Assigned(FRelation) and
3198	>	(FRelation.RelationName <> Relation) do
3199	>	FRelation := FRelation.NextRelation;
3200	>	if not Assigned(FRelation) then
3201	>	FRelation := Add_Node(Relation, Field);
3202	>	Result := false;
3203	>	FField := FRelation.FieldNodes;
3204	>	while Assigned(FField) do
3205	>	if FField.FieldName = Field then
3206	>	begin
3207	>	Result := Ffield.COMPUTED_BLR;
3208	>	Exit;
3209	>	end
3210	>	else
3211	>	FField := Ffield.NextField;
3212	>	end;
3213	>
3214	>	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
3215	>	var
3216	>	FRelation : TRelationNode;
3217	>	FField : TFieldNode;
3218	>	begin
3219	>	FRelation := FRelationNodes;
3220	>	while Assigned(FRelation) and
3221	>	(FRelation.RelationName <> Relation) do
3222	>	FRelation := FRelation.NextRelation;
3223	>	if not Assigned(FRelation) then
3224	>	FRelation := Add_Node(Relation, Field);
3225	>	Result := false;
3226	>	FField := FRelation.FieldNodes;
3227	>	while Assigned(FField) do
3228	>	if FField.FieldName = Field then
3229	>	begin
3230	>	Result := Ffield.DEFAULT_VALUE;
3231	>	Exit;
3232	>	end
3233	>	else
3234	>	FField := Ffield.NextField;
3235	>	end;
3236	>
3237	>	Procedure FreeNodes;
3238	>	var
3239	>	FRelation : TRelationNode;
3240	>	FField : TFieldNode;
3241	>	begin
3242	>	while Assigned(FRelationNodes) do
3243	>	begin
3244	>	While Assigned(FRelationNodes.FieldNodes) do
3245	>	begin
3246	>	FField := FRelationNodes.FieldNodes.NextField;
3247	>	FRelationNodes.FieldNodes.Free;
3248	>	FRelationNodes.FieldNodes := FField;
3249	>	end;
3250	>	FRelation := FRelationNodes.NextRelation;
3251	>	FRelationNodes.Free;
3252	>	FRelationNodes := FRelation;
3253	>	end;
3254	>	end;
3255	>
3256	>	begin
3257	>	FRelationNodes := TRelationNode.Create;
3258	>	FNeedsRefresh := False;
3259	>	Database.InternalTransaction.StartTransaction;
3260	>	Query := TIBSQL.Create(self);
3261	>	try
3262	>	Query.Database := DataBase;
3263	>	Query.Transaction := Database.InternalTransaction;
3264	>	FieldDefs.BeginUpdate;
3265	>	FieldDefs.Clear;
3266	>	FieldIndex := 0;
3267	>	if (Length(FMappedFieldPosition) < SourceQuery.Current.Count) then
3268	>	SetLength(FMappedFieldPosition, SourceQuery.Current.Count);
3269	>	Query.SQL.Text := DefaultSQL;
3270	>	Query.Prepare;
3271	>	SetLength(FAliasNameMap, SourceQuery.Current.Count);
3272	>	SetLength(FAliasNameList, SourceQuery.Current.Count);
3273	>	for i := 0 to SourceQuery.Current.Count - 1 do
3274	>	with SourceQuery.Current[i].Data^ do
3275	>	begin
3276	>	{ Get the field name }
3277	>	FieldAliasName := SourceQuery.Current[i].Name;
3278	>	SetString(DBAliasName, aliasname, aliasname_length);
3279	>	SetString(RelationName, relname, relname_length);
3280	>	SetString(FieldName, sqlname, sqlname_length);
3281	>	FAliasNameList[i] := DBAliasName;
3282	>	FieldSize := 0;
3283	>	FieldPrecision := 0;
3284	>	FieldNullable := SourceQuery.Current[i].IsNullable;
3285	>	case sqltype and not 1 of
3286	>	{ All VARCHAR's must be converted to strings before recording
3287	>	their values }
3288	>	SQL_VARYING, SQL_TEXT:
3289	>	begin
3290	>	CharSetSize := FBase.GetCharSetSize(sqlsubtype and $FF);
3291	>	{FieldSize is encoded for strings - see TIBStringField.SetSize for decode}
3292	>	FieldSize := sqllen * 4 + (CharSetSize - 1);
3293	>	FieldType := ftString;
3294	>	end;
3295	>	{ All Doubles/Floats should be cast to doubles }
3296	>	SQL_DOUBLE, SQL_FLOAT:
3297	>	FieldType := ftFloat;
3298	>	SQL_SHORT:
3299	>	begin
3300	>	if (sqlscale = 0) then
3301	>	FieldType := ftSmallInt
3302	>	else begin
3303	>	FieldType := ftBCD;
3304	>	FieldPrecision := 4;
3305	>	FieldSize := -sqlscale;
3306	>	end;
3307	>	end;
3308	>	SQL_LONG:
3309	>	begin
3310	>	if (sqlscale = 0) then
3311	>	FieldType := ftInteger
3312	>	else if (sqlscale >= (-4)) then
3313	>	begin
3314	>	FieldType := ftBCD;
3315	>	FieldPrecision := 9;
3316	>	FieldSize := -sqlscale;
3317	>	end
3318	>	else
3319	>	if Database.SQLDialect = 1 then
3320	>	FieldType := ftFloat
3321	>	else
3322	>	if (FieldCount > i) and (Fields[i] is TFloatField) then
3323	>	FieldType := ftFloat
3324	>	else
3325	>	begin
3326	>	FieldType := ftFMTBCD;
3327	>	FieldPrecision := 9;
3328	>	FieldSize := -sqlscale;
3329	>	end;
3330	>	end;
3331	>
3332	>	SQL_INT64:
3333	>	begin
3334	>	if (sqlscale = 0) then
3335	>	FieldType := ftLargeInt
3336	>	else if (sqlscale >= (-4)) then
3337	>	begin
3338	>	FieldType := ftBCD;
3339	>	FieldPrecision := 18;
3340	>	FieldSize := -sqlscale;
3341	>	end
3342	>	else
3343	>	FieldType := ftFloat
3344	>	end;
3345	>	SQL_TIMESTAMP: FieldType := ftDateTime;
3346	>	SQL_TYPE_TIME: FieldType := ftTime;
3347	>	SQL_TYPE_DATE: FieldType := ftDate;
3348	>	SQL_BLOB:
3349	>	begin
3350	>	FieldSize := sizeof (TISC_QUAD);
3351	>	if (sqlsubtype = 1) then
3352	>	FieldType := ftmemo
3353	>	else
3354	>	FieldType := ftBlob;
3355	>	end;
3356	>	SQL_ARRAY:
3357	>	begin
3358	>	FieldSize := sizeof (TISC_QUAD);
3359	>	FieldType := ftUnknown;
3360	>	end;
3361	>	SQL_BOOLEAN:
3362	>	FieldType:= ftBoolean;
3363	>	else
3364	>	FieldType := ftUnknown;
3365	>	end;
3366	>	FieldPosition := i + 1;
3367	>	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
3368	>	begin
3369	>	FMappedFieldPosition[FieldIndex] := FieldPosition;
3370	>	Inc(FieldIndex);
3371	>	with FieldDefs.AddFieldDef do
3372	>	begin
3373	>	Name := FieldAliasName;
3374	>	FAliasNameMap[FieldNo-1] := DBAliasName;
3375	>	DataType := FieldType;
3376	>	Size := FieldSize;
3377	>	Precision := FieldPrecision;
3378	>	Required := not FieldNullable;
3379	>	InternalCalcField := False;
3380	>	if (FieldName <> '') and (RelationName <> '') then
3381	>	begin
3382	>	if Has_COMPUTED_BLR(RelationName, FieldName) then
3383	>	begin
3384	>	Attributes := [faReadOnly];
3385	>	InternalCalcField := True;
3386	>	FNeedsRefresh := True;
3387	>	end
3388	>	else
3389	>	begin
3390	>	if Has_DEFAULT_VALUE(RelationName, FieldName) then
3391	>	begin
3392	>	if not FieldNullable then
3393	>	Attributes := [faRequired];
3394	>	end
3395	>	else
3396	>	FNeedsRefresh := True;
3397	>	end;
3398	>	end;
3399	>	end;
3400	>	end;
3401	>	end;
3402	>	finally
3403	>	Query.free;
3404	>	FreeNodes;
3405	>	Database.InternalTransaction.Commit;
3406	>	FieldDefs.EndUpdate;
3407	>	end;
3408	>	end;
3409	>
3410	>	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
3411	>	begin
3412	>	CopyRecordBuffer(FModelBuffer, Buffer);
3413	>	end;
3414	>
3415	>	procedure TIBCustomDataSet.InternalLast;
3416	>	var
3417	>	Buffer: PChar;
3418	>	begin
3419	>	if (FQSelect.EOF) then
3420	>	FCurrentRecord := FRecordCount
3421	>	else begin
3422	>	Buffer := AllocRecordBuffer;
3423	>	try
3424	>	while FQSelect.Next <> nil do
3425	>	begin
3426	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3427	>	Inc(FRecordCount);
3428	>	end;
3429	>	FCurrentRecord := FRecordCount;
3430	>	finally
3431	>	FreeRecordBuffer(Buffer);
3432	>	end;
3433	>	end;
3434	>	end;
3435	>
3436	>	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
3437	>	var
3438	>	i: Integer;
3439	>	cur_param: TIBXSQLVAR;
3440	>	cur_field: TField;
3441	>	s: TStream;
3442	>	begin
3443	>	if FQSelect.SQL.Text = '' then
3444	>	IBError(ibxeEmptyQuery, [nil]);
3445	>	if not FInternalPrepared then
3446	>	InternalPrepare;
3447	>	if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
3448	>	begin
3449	>	for i := 0 to SQLParams.Count - 1 do
3450	>	begin
3451	>	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
3452	>	cur_param := SQLParams[i];
3453	>	if (cur_field <> nil) then begin
3454	>	if (cur_field.IsNull) then
3455	>	cur_param.IsNull := True
3456	>	else case cur_field.DataType of
3457	>	ftString:
3458	>	cur_param.AsString := cur_field.AsString;
3459	>	ftBoolean:
3460	>	cur_param.AsBoolean := cur_field.AsBoolean;
3461	>	ftSmallint, ftWord:
3462	>	cur_param.AsShort := cur_field.AsInteger;
3463	>	ftInteger:
3464	>	cur_param.AsLong := cur_field.AsInteger;
3465	>	ftLargeInt:
3466	>	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
3467	>	ftFloat, ftCurrency:
3468	>	cur_param.AsDouble := cur_field.AsFloat;
3469	>	ftBCD:
3470	>	cur_param.AsCurrency := cur_field.AsCurrency;
3471	>	ftDate:
3472	>	cur_param.AsDate := cur_field.AsDateTime;
3473	>	ftTime:
3474	>	cur_param.AsTime := cur_field.AsDateTime;
3475	>	ftDateTime:
3476	>	cur_param.AsDateTime := cur_field.AsDateTime;
3477	>	ftBlob, ftMemo:
3478	>	begin
3479	>	s := nil;
3480	>	try
3481	>	s := DataSource.DataSet.
3482	>	CreateBlobStream(cur_field, bmRead);
3483	>	cur_param.LoadFromStream(s);
3484	>	finally
3485	>	s.free;
3486	>	end;
3487	>	end;
3488	>	else
3489	>	IBError(ibxeNotSupported, [nil]);
3490	>	end;
3491	>	end;
3492	>	end;
3493	>	end;
3494	>	end;
3495	>
3496	>	procedure TIBCustomDataSet.ReQuery;
3497	>	begin
3498	>	FQSelect.Close;
3499	>	ClearBlobCache;
3500	>	FCurrentRecord := -1;
3501	>	FRecordCount := 0;
3502	>	FDeletedRecords := 0;
3503	>	FBPos := 0;
3504	>	FOBPos := 0;
3505	>	FBEnd := 0;
3506	>	FOBEnd := 0;
3507	>	FQSelect.Close;
3508	>	FQSelect.ExecQuery;
3509	>	FOpen := FQSelect.Open;
3510	>	First;
3511	>	end;
3512	>
3513	>	procedure TIBCustomDataSet.InternalOpen;
3514	>
3515	>	function RecordDataLength(n: Integer): Long;
3516	>	begin
3517	>	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
3518	>	end;
3519	>
3520	>	begin
3521	>	FBase.SetCursor;
3522	>	try
3523	>	ActivateConnection;
3524	>	ActivateTransaction;
3525	>	if FQSelect.SQL.Text = '' then
3526	>	IBError(ibxeEmptyQuery, [nil]);
3527	>	if not FInternalPrepared then
3528	>	InternalPrepare;
3529	>	if FQSelect.SQLType = SQLSelect then
3530	>	begin
3531	>	if DefaultFields then
3532	>	CreateFields;
3533	>	BindFields(True);
3534	>	FCurrentRecord := -1;
3535	>	FQSelect.ExecQuery;
3536	>	FOpen := FQSelect.Open;
3537	>
3538	>	{ Initialize offsets, buffer sizes, etc...
3539	>	1. Initially FRecordSize is just the "RecordDataLength".
3540	>	2. Allocate a "model" buffer and do a dummy fetch
3541	>	3. After the dummy fetch, FRecordSize will be appropriately
3542	>	adjusted to reflect the additional "weight" of the field
3543	>	data.
3544	>	4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize.
3545	>	5. Now, with the BufferSize available, allocate memory for chunks of records
3546	>	6. Re-allocate the model buffer, accounting for the new
3547	>	FRecordBufferSize.
3548	>	7. Finally, calls to AllocRecordBuffer will work!.
3549	>	}
3550	>	{Step 1}
3551	>	FRecordSize := RecordDataLength(FQSelect.Current.Count);
3552	>	{Step 2, 3}
3553	>	IBAlloc(FModelBuffer, 0, FRecordSize);
3554	>	FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer);
3555	>	{Step 4}
3556	>	FCalcFieldsOffset := FRecordSize;
3557	>	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
3558	>	FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
3559	>	{Step 5}
3560	>	if UniDirectional then
3561	>	FBufferChunkSize := FRecordBufferSize * UniCache
3562	>	else
3563	>	FBufferChunkSize := FRecordBufferSize * BufferChunks;
3564	>	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
3565	>	if FCachedUpdates or (csReading in ComponentState) then
3566	>	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
3567	>	FBPos := 0;
3568	>	FOBPos := 0;
3569	>	FBEnd := 0;
3570	>	FOBEnd := 0;
3571	>	FCacheSize := FBufferChunkSize;
3572	>	FOldCacheSize := FBufferChunkSize;
3573	>	{Step 6}
3574	>	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count),
3575	>	FRecordBufferSize);
3576	>	{Step 7}
3577	>	FOldBuffer := AllocRecordBuffer;
3578	>	end
3579	>	else
3580	>	FQSelect.ExecQuery;
3581	>	finally
3582	>	FBase.RestoreCursor;
3583	>	end;
3584	>	end;
3585	>
3586	>	procedure TIBCustomDataSet.InternalPost;
3587	>	var
3588	>	Qry: TIBSQL;
3589	>	Buff: PChar;
3590	>	bInserting: Boolean;
3591	>	begin
3592	>	FBase.SetCursor;
3593	>	try
3594	>	Buff := GetActiveBuf;
3595	>	CheckEditState;
3596	>	AdjustRecordOnInsert(Buff);
3597	>	if (State = dsInsert) then
3598	>	begin
3599	>	bInserting := True;
3600	>	Qry := FQInsert;
3601	>	PRecordData(Buff)^.rdUpdateStatus := usInserted;
3602	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3603	>	WriteRecordCache(FRecordCount, Buff);
3604	>	FCurrentRecord := FRecordCount;
3605	>	end
3606	>	else begin
3607	>	bInserting := False;
3608	>	Qry := FQModify;
3609	>	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
3610	>	begin
3611	>	PRecordData(Buff)^.rdUpdateStatus := usModified;
3612	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
3613	>	end
3614	>	else if PRecordData(Buff)^.
3615	>	rdCachedUpdateStatus = cusUninserted then
3616	>	begin
3617	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3618	>	Dec(FDeletedRecords);
3619	>	end;
3620	>	end;
3621	>	if (not CachedUpdates) then
3622	>	InternalPostRecord(Qry, Buff)
3623	>	else begin
3624	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3625	>	FUpdatesPending := True;
3626	>	end;
3627	>	if bInserting then
3628	>	Inc(FRecordCount);
3629	>	finally
3630	>	FBase.RestoreCursor;
3631	>	end;
3632	>	end;
3633	>
3634	>	procedure TIBCustomDataSet.InternalRefresh;
3635	>	begin
3636	>	inherited InternalRefresh;
3637	>	InternalRefreshRow;
3638	>	end;
3639	>
3640	>	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
3641	>	begin
3642	>	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
3643	>	end;
3644	>
3645	>	function TIBCustomDataSet.IsCursorOpen: Boolean;
3646	>	begin
3647	>	result := FOpen;
3648	>	end;
3649	>
3650	>	procedure TIBCustomDataSet.Loaded;
3651	>	begin
3652	>	if assigned(FQSelect) then
3653	>	FBaseSQLSelect.assign(FQSelect.SQL);
3654	>	inherited Loaded;
3655	>	end;
3656	>
3657	>	procedure TIBCustomDataSet.Post;
3658	>	var CancelPost: boolean;
3659	>	begin
3660	>	CancelPost := false;
3661	>	if assigned(FOnValidatePost) then
3662	>	OnValidatePost(self,CancelPost);
3663	>	if CancelPost then
3664	>	Cancel
3665	>	else
3666	>	inherited Post;
3667	>	end;
3668	>
3669	>	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
3670	>	Options: TLocateOptions): Boolean;
3671	>	var
3672	>	{$IF FPC_FULLVERSION >= 20700 }
3673	>	CurBookmark: TBookmark;
3674	>	{$ELSE}
3675	>	CurBookmark: string;
3676	>	{$ENDIF}
3677	>	begin
3678	>	DisableControls;
3679	>	try
3680	>	CurBookmark := Bookmark;
3681	>	First;
3682	>	result := InternalLocate(KeyFields, KeyValues, Options);
3683	>	if not result then
3684	>	Bookmark := CurBookmark;
3685	>	finally
3686	>	EnableControls;
3687	>	end;
3688	>	end;
3689	>
3690	>	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
3691	>	const ResultFields: string): Variant;
3692	>	var
3693	>	fl: TList;
3694	>	{$IF FPC_FULLVERSION >= 20700 }
3695	>	CurBookmark: TBookmark;
3696	>	{$ELSE}
3697	>	CurBookmark: string;
3698	>	{$ENDIF}
3699	>	begin
3700	>	DisableControls;
3701	>	fl := TList.Create;
3702	>	CurBookmark := Bookmark;
3703	>	try
3704	>	First;
3705	>	if InternalLocate(KeyFields, KeyValues, []) then
3706	>	begin
3707	>	if (ResultFields <> '') then
3708	>	result := FieldValues[ResultFields]
3709	>	else
3710	>	result := NULL;
3711	>	end
3712	>	else
3713	>	result := Null;
3714	>	finally
3715	>	Bookmark := CurBookmark;
3716	>	fl.Free;
3717	>	EnableControls;
3718	>	end;
3719	>	end;
3720	>
3721	>	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
3722	>	begin
3723	>	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
3724	>	end;
3725	>
3726	>	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
3727	>	begin
3728	>	PRecordData(Buffer)^.rdBookmarkFlag := Value;
3729	>	end;
3730	>
3731	>	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
3732	>	begin
3733	>	if not Value and FCachedUpdates then
3734	>	CancelUpdates;
3735	>	if (not (csReading in ComponentState)) and Value then
3736	>	CheckDatasetClosed;
3737	>	FCachedUpdates := Value;
3738	>	end;
3739	>
3740	>	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
3741	>	begin
3742	>	if IsLinkedTo(Value) then
3743	>	IBError(ibxeCircularReference, [nil]);
3744	>	if FDataLink <> nil then
3745	>	FDataLink.DataSource := Value;
3746	>	end;
3747	>
3748	>	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
3749	>	var
3750	>	Buff, TmpBuff: PChar;
3751	>	MappedFieldPos: integer;
3752	>	begin
3753	>	Buff := GetActiveBuf;
3754	>	if Field.FieldNo < 0 then
3755	>	begin
3756	>	TmpBuff := Buff + FRecordSize + Field.Offset;
3757	>	Boolean(TmpBuff[0]) := LongBool(Buffer);
3758	>	if Boolean(TmpBuff[0]) then
3759	>	Move(Buffer^, TmpBuff[1], Field.DataSize);
3760	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3761	>	end
3762	>	else begin
3763	>	CheckEditState;
3764	>	with PRecordData(Buff)^ do
3765	>	begin
3766	>	{ If inserting, Adjust record position }
3767	>	AdjustRecordOnInsert(Buff);
3768	>	MappedFieldPos := FMappedFieldPosition[Field.FieldNo - 1];
3769	>	if (MappedFieldPos > 0) and
3770	>	(MappedFieldPos <= rdFieldCount) then
3771	>	begin
3772	>	Field.Validate(Buffer);
3773	>	if (Buffer = nil) or
3774	>	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
3775	>	rdFields[MappedFieldPos].fdIsNull := True
3776	>	else begin
3777	>	Move(Buffer^, Buff[rdFields[MappedFieldPos].fdDataOfs],
3778	>	rdFields[MappedFieldPos].fdDataSize);
3779	>	if (rdFields[MappedFieldPos].fdDataType = SQL_TEXT) or
3780	>	(rdFields[MappedFieldPos].fdDataType = SQL_VARYING) then
3781	>	rdFields[MappedFieldPos].fdDataLength := StrLen(PChar(Buffer));
3782	>	rdFields[MappedFieldPos].fdIsNull := False;
3783	>	if rdUpdateStatus = usUnmodified then
3784	>	begin
3785	>	if CachedUpdates then
3786	>	begin
3787	>	FUpdatesPending := True;
3788	>	if State = dsInsert then
3789	>	rdCachedUpdateStatus := cusInserted
3790	>	else if State = dsEdit then
3791	>	rdCachedUpdateStatus := cusModified;
3792	>	end;
3793	>
3794	>	if State = dsInsert then
3795	>	rdUpdateStatus := usInserted
3796	>	else
3797	>	rdUpdateStatus := usModified;
3798	>	end;
3799	>	WriteRecordCache(rdRecordNumber, Buff);
3800	>	SetModified(True);
3801	>	end;
3802	>	end;
3803	>	end;
3804	>	end;
3805	>	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
3806	>	DataEvent(deFieldChange, PtrInt(Field));
3807	>	end;
3808	>
3809	>	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
3810	>	begin
3811	>	CheckBrowseMode;
3812	>	if (Value < 1) then
3813	>	Value := 1
3814	>	else if Value > FRecordCount then
3815	>	begin
3816	>	InternalLast;
3817	>	Value := Min(FRecordCount, Value);
3818	>	end;
3819	>	if (Value <> RecNo) then
3820	>	begin
3821	>	DoBeforeScroll;
3822	>	FCurrentRecord := Value - 1;
3823	>	Resync([]);
3824	>	DoAfterScroll;
3825	>	end;
3826	>	end;
3827	>
3828	>	procedure TIBCustomDataSet.Disconnect;
3829	>	begin
3830	>	Close;
3831	>	InternalUnPrepare;
3832	>	end;
3833	>
3834	>	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
3835	>	begin
3836	>	if not CanModify then
3837	>	IBError(ibxeCannotUpdate, [nil])
3838	>	else
3839	>	FUpdateMode := Value;
3840	>	end;
3841	>
3842	>
3843	>	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
3844	>	begin
3845	>	if Value <> FUpdateObject then
3846	>	begin
3847	>	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
3848	>	FUpdateObject.DataSet := nil;
3849	>	FUpdateObject := Value;
3850	>	if Assigned(FUpdateObject) then
3851	>	begin
3852	>	if Assigned(FUpdateObject.DataSet) and
3853	>	(FUpdateObject.DataSet <> Self) then
3854	>	FUpdateObject.DataSet.UpdateObject := nil;
3855	>	FUpdateObject.DataSet := Self;
3856	>	end;
3857	>	end;
3858	>	end;
3859	>
3860	>	function TIBCustomDataSet.ConstraintsStored: Boolean;
3861	>	begin
3862	>	Result := Constraints.Count > 0;
3863	>	end;
3864	>
3865	>	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
3866	>	begin
3867	>	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
3868	>	end;
3869	>
3870	>	procedure TIBCustomDataSet.ClearIBLinks;
3871	>	var i: integer;
3872	>	begin
3873	>	for i := FIBLinks.Count - 1 downto 0 do
3874	>	TIBControlLink(FIBLinks[i]).IBDataSet := nil;
3875	>	end;
3876	>
3877	>
3878	>	procedure TIBCustomDataSet.InternalUnPrepare;
3879	>	begin
3880	>	if FInternalPrepared then
3881	>	begin
3882	>	CheckDatasetClosed;
3883	>	FieldDefs.Clear;
3884	>	FieldDefs.Updated := false;
3885	>	FInternalPrepared := False;
3886	>	Setlength(FAliasNameList,0);
3887	>	end;
3888	>	end;
3889	>
3890	>	procedure TIBCustomDataSet.InternalExecQuery;
3891	>	var
3892	>	DidActivate: Boolean;
3893	>	begin
3894	>	DidActivate := False;
3895	>	FBase.SetCursor;
3896	>	try
3897	>	ActivateConnection;
3898	>	DidActivate := ActivateTransaction;
3899	>	if FQSelect.SQL.Text = '' then
3900	>	IBError(ibxeEmptyQuery, [nil]);
3901	>	if not FInternalPrepared then
3902	>	InternalPrepare;
3903	>	if FQSelect.SQLType = SQLSelect then
3904	>	begin
3905	>	IBError(ibxeIsASelectStatement, [nil]);
3906	>	end
3907	>	else
3908	>	FQSelect.ExecQuery;
3909	>	finally
3910	>	if DidActivate then
3911	>	DeactivateTransaction;
3912	>	FBase.RestoreCursor;
3913	>	end;
3914	>	end;
3915	>
3916	>	function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE;
3917	>	begin
3918	>	Result := FQSelect.Handle;
3919	>	end;
3920	>
3921	>	function TIBCustomDataSet.GetParser: TSelectSQLParser;
3922	>	begin
3923	>	if not assigned(FParser) then
3924	>	FParser := CreateParser;
3925	>	Result := FParser
3926	>	end;
3927	>
3928	>	procedure TIBCustomDataSet.ResetParser;
3929	>	begin
3930	>	if assigned(FParser) then
3931	>	begin
3932	>	FParser.Free;
3933	>	FParser := nil;
3934	>	SQLChanging(nil)
3935	>	end;
3936	>	end;
3937	>
3938	>	function TIBCustomDataSet.HasParser: boolean;
3939	>	begin
3940	>	Result := not (csDesigning in ComponentState) and (FParser <> nil)
3941	>	end;
3942	>
3943	>	procedure TIBCustomDataSet.SetGenerateParamNames(AValue: Boolean);
3944	>	begin
3945	>	if FGenerateParamNames = AValue then Exit;
3946	>	FGenerateParamNames := AValue;
3947	>	Disconnect
3948	>	end;
3949	>
3950	>	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
3951	>	begin
3952	>	inherited InitRecord(Buffer);
3953	>	with PRecordData(Buffer)^ do
3954	>	begin
3955	>	rdUpdateStatus := TUpdateStatus(usInserted);
3956	>	rdBookMarkFlag := bfInserted;
3957	>	rdRecordNumber := -1;
3958	>	end;
3959	>	end;
3960	>
3961	>	procedure TIBCustomDataSet.InternalInsert;
3962	>	begin
3963	>	CursorPosChanged;
3964	>	end;
3965	>
3966	>	{ TIBDataSet IProviderSupport }
3967	>
3968	>	(*procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
3969	>	begin
3970	>	if Commit then
3971	>	Transaction.Commit else
3972	>	Transaction.Rollback;
3973	>	end;
3974	>
3975	>	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
3976	>	ResultSet: Pointer = nil): Integer;
3977	>	var
3978	>	FQuery: TIBQuery;
3979	>	begin
3980	>	if Assigned(ResultSet) then
3981	>	begin
3982	>	TDataSet(ResultSet^) := TIBQuery.Create(nil);
3983	>	with TIBQuery(ResultSet^) do
3984	>	begin
3985	>	SQL.Text := ASQL;
3986	>	Params.Assign(AParams);
3987	>	Open;
3988	>	Result := RowsAffected;
3989	>	end;
3990	>	end
3991	>	else
3992	>	begin
3993	>	FQuery := TIBQuery.Create(nil);
3994	>	try
3995	>	FQuery.Database := Database;
3996	>	FQuery.Transaction := Transaction;
3997	>	FQuery.GenerateParamNames := True;
3998	>	FQuery.SQL.Text := ASQL;
3999	>	FQuery.Params.Assign(AParams);
4000	>	FQuery.ExecSQL;
4001	>	Result := FQuery.RowsAffected;
4002	>	finally
4003	>	FQuery.Free;
4004	>	end;
4005	>	end;
4006	>	end;
4007	>
4008	>	function TIBCustomDataSet.PSGetQuoteChar: string;
4009	>	begin
4010	>	if Database.SQLDialect = 3 then
4011	>	Result := '"' else
4012	>	Result := '';
4013	>	end;
4014	>
4015	>	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
4016	>	var
4017	>	PrevErr: Integer;
4018	>	begin
4019	>	if Prev <> nil then
4020	>	PrevErr := Prev.ErrorCode else
4021	>	PrevErr := 0;
4022	>	if E is EIBError then
4023	>	with EIBError(E) do
4024	>	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
4025	>	Result := inherited PSGetUpdateException(E, Prev);
4026	>	end;
4027	>
4028	>	function TIBCustomDataSet.PSInTransaction: Boolean;
4029	>	begin
4030	>	Result := Transaction.InTransaction;
4031	>	end;
4032	>
4033	>	function TIBCustomDataSet.PSIsSQLBased: Boolean;
4034	>	begin
4035	>	Result := True;
4036	>	end;
4037	>
4038	>	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
4039	>	begin
4040	>	Result := True;
4041	>	end;
4042	>
4043	>	procedure TIBCustomDataSet.PSReset;
4044	>	begin
4045	>	inherited PSReset;
4046	>	if Active then
4047	>	begin
4048	>	Close;
4049	>	Open;
4050	>	end;
4051	>	end;
4052	>
4053	>	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
4054	>	var
4055	>	UpdateAction: TIBUpdateAction;
4056	>	SQL: string;
4057	>	Params: TParams;
4058	>
4059	>	procedure AssignParams(DataSet: TDataSet; Params: TParams);
4060	>	var
4061	>	I: Integer;
4062	>	Old: Boolean;
4063	>	Param: TParam;
4064	>	PName: string;
4065	>	Field: TField;
4066	>	Value: Variant;
4067	>	begin
4068	>	for I := 0 to Params.Count - 1 do
4069	>	begin
4070	>	Param := Params[I];
4071	>	PName := Param.Name;
4072	>	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
4073	>	if Old then System.Delete(PName, 1, 4);
4074	>	Field := DataSet.FindField(PName);
4075	>	if not Assigned(Field) then Continue;
4076	>	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
4077	>	begin
4078	>	Value := Field.NewValue;
4079	>	if VarIsEmpty(Value) then Value := Field.OldValue;
4080	>	Param.AssignFieldValue(Field, Value);
4081	>	end;
4082	>	end;
4083	>	end;
4084	>
4085	>	begin
4086	>	Result := False;
4087	>	if Assigned(OnUpdateRecord) then
4088	>	begin
4089	>	UpdateAction := uaFail;
4090	>	if Assigned(FOnUpdateRecord) then
4091	>	begin
4092	>	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
4093	>	Result := UpdateAction = uaApplied;
4094	>	end;
4095	>	end
4096	>	else if Assigned(FUpdateObject) then
4097	>	begin
4098	>	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
4099	>	if SQL <> '' then
4100	>	begin
4101	>	Params := TParams.Create;
4102	>	try
4103	>	Params.ParseSQL(SQL, True);
4104	>	AssignParams(Delta, Params);
4105	>	if PSExecuteStatement(SQL, Params) = 0 then
4106	>	IBError(ibxeNoRecordsAffected, [nil]);
4107	>	Result := True;
4108	>	finally
4109	>	Params.Free;
4110	>	end;
4111	>	end;
4112	>	end;
4113	>	end;
4114	>
4115	>	procedure TIBCustomDataSet.PSStartTransaction;
4116	>	begin
4117	>	ActivateConnection;
4118	>	Transaction.StartTransaction;
4119	>	end;
4120	>
4121	>	function TIBCustomDataSet.PSGetTableName: string;
4122	>	begin
4123	>	//  if not FInternalPrepared then
4124	>	//    InternalPrepare;
4125	>	{ It is possible for the FQSelectSQL to be unprepared
4126	>	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
4127	>	So check the Prepared of the SelectSQL instead }
4128	>	if not FQSelect.Prepared then
4129	>	FQSelect.Prepare;
4130	>	Result := FQSelect.UniqueRelationName;
4131	>	end;*)
4132	>
4133	>	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
4134	>	begin
4135	>	InternalBatchInput(InputObject);
4136	>	end;
4137	>
4138	>	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
4139	>	begin
4140	>	InternalBatchOutput(OutputObject);
4141	>	end;
4142	>
4143	>	procedure TIBDataSet.ExecSQL;
4144	>	begin
4145	>	InternalExecQuery;
4146	>	end;
4147	>
4148	>	procedure TIBDataSet.Prepare;
4149	>	begin
4150	>	InternalPrepare;
4151	>	end;
4152	>
4153	>	procedure TIBDataSet.UnPrepare;
4154	>	begin
4155	>	InternalUnPrepare;
4156	>	end;
4157	>
4158	>	function TIBDataSet.GetPrepared: Boolean;
4159	>	begin
4160	>	Result := InternalPrepared;
4161	>	end;
4162	>
4163	>	procedure TIBDataSet.InternalOpen;
4164	>	begin
4165	>	ActivateConnection;
4166	>	ActivateTransaction;
4167	>	InternalSetParamsFromCursor;
4168	>	Inherited InternalOpen;
4169	>	end;
4170	>
4171	>	procedure TIBDataSet.SetFiltered(Value: Boolean);
4172	>	begin
4173	>	if(Filtered <> Value) then
4174	>	begin
4175	>	inherited SetFiltered(value);
4176	>	if Active then
4177	>	begin
4178	>	Close;
4179	>	Open;
4180	>	end;
4181	>	end
4182	>	else
4183	>	inherited SetFiltered(value);
4184	>	end;
4185	>
4186	>	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
4187	>	begin
4188	>	Result := false;
4189	>	if not Assigned(Bookmark) then
4190	>	exit;
4191	>	Result := PInteger(Bookmark)^ < FRecordCount;
4192	>	end;
4193	>
4194	>	function TIBCustomDataSet.GetFieldData(Field: TField;
4195	>	Buffer: Pointer): Boolean;
4196	>	{$IFDEF TBCDFIELD_IS_BCD}
4197	>	var
4198	>	lTempCurr : System.Currency;
4199	>	begin
4200	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4201	>	begin
4202	>	Result := InternalGetFieldData(Field, @lTempCurr);
4203	>	if Result then
4204	>	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
4205	>	end
4206	>	else
4207	>	{$ELSE}
4208	>	begin
4209	>	{$ENDIF}
4210	>	Result := InternalGetFieldData(Field, Buffer);
4211	>	end;
4212	>
4213	>	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
4214	>	NativeFormat: Boolean): Boolean;
4215	>	begin
4216	>	if (Field.DataType = ftBCD) and not NativeFormat then
4217	>	Result := InternalGetFieldData(Field, Buffer)
4218	>	else
4219	>	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
4220	>	end;
4221	>
4222	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
4223	>	{$IFDEF TDBDFIELD_IS_BCD}
4224	>	var
4225	>	lTempCurr : System.Currency;
4226	>	begin
4227	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4228	>	begin
4229	>	BCDToCurr(TBCD(Buffer^), lTempCurr);
4230	>	InternalSetFieldData(Field, @lTempCurr);
4231	>	end
4232	>	else
4233	>	{$ELSE}
4234	>	begin
4235	>	{$ENDIF}
4236	>	InternalSetFieldData(Field, Buffer);
4237	>	end;
4238	>
4239	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
4240	>	NativeFormat: Boolean);
4241	>	begin
4242	>	if (not NativeFormat) and (Field.DataType = ftBCD) then
4243	>	InternalSetfieldData(Field, Buffer)
4244	>	else
4245	>	inherited SetFieldData(Field, buffer, NativeFormat);
4246	>	end;
4247	>
4248	>	{ TIBDataSetUpdateObject }
4249	>
4250	>	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
4251	>	begin
4252	>	inherited Create(AOwner);
4253	>	FRefreshSQL := TStringList.Create;
4254	>	end;
4255	>
4256	>	destructor TIBDataSetUpdateObject.Destroy;
4257	>	begin
4258	>	FRefreshSQL.Free;
4259	>	inherited Destroy;
4260	>	end;
4261	>
4262	>	procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings);
4263	>	begin
4264	>	FRefreshSQL.Assign(Value);
4265	>	end;
4266	>
4267	>	procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
4268	>	begin
4269	>	if not Assigned(DataSet) then Exit;
4270	>	DataSet.SetInternalSQLParams(Query, buff);
4271	>	end;
4272	>
4273	>	{ TIBDSBlobStream }
4274	>	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
4275	>	Mode: TBlobStreamMode);
4276	>	begin
4277	>	FField := AField;
4278	>	FBlobStream := ABlobStream;
4279	>	FBlobStream.Seek(0, soFromBeginning);
4280	>	if (Mode = bmWrite) then
4281	>	FBlobStream.Truncate;
4282	>	end;
4283	>
4284	>	destructor TIBDSBlobStream.Destroy;
4285	>	begin
4286	>	if FHasWritten then
4287	>	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4288	>	inherited Destroy;
4289	>	end;
4290	>
4291	>	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
4292	>	begin
4293	>	result := FBlobStream.Read(Buffer, Count);
4294	>	end;
4295	>
4296	>	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
4297	>	begin
4298	>	result := FBlobStream.Seek(Offset, Origin);
4299	>	end;
4300	>
4301	>	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
4302	>	begin
4303	>	FBlobStream.SetSize(NewSize);
4304	>	end;
4305	>
4306	>	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
4307	>	begin
4308	>	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
4309	>	IBError(ibxeNotEditing, [nil]);
4310	>	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4311	>	TBlobField(FField).Modified := true;
4312	>	result := FBlobStream.Write(Buffer, Count);
4313	>	FHasWritten := true;
4314	>	{  TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4315	>	Removed as this caused a seek to beginning of the blob stream thus corrupting
4316	>	the blob stream. Moved to the destructor i.e. called after blob written}
4317	>	end;
4318	>
4319	>	{ TIBGenerator }
4320	>
4321	>	procedure TIBGenerator.SetIncrement(const AValue: integer);
4322	>	begin
4323	>	if AValue < 0 then
4324	>	raise Exception.Create('A Generator Increment cannot be negative');
4325	>	FIncrement := AValue
4326	>	end;
4327	>
4328	>	function TIBGenerator.GetNextValue(ADatabase: TIBDatabase;
4329	>	ATransaction: TIBTransaction): integer;
4330	>	begin
4331	>	with TIBSQL.Create(nil) do
4332	>	try
4333	>	Database := ADatabase;
4334	>	Transaction := ATransaction;
4335	>	if not assigned(Database) then
4336	>	IBError(ibxeCannotSetDatabase,[]);
4337	>	if not assigned(Transaction) then
4338	>	IBError(ibxeCannotSetTransaction,[]);
4339	>	with Transaction do
4340	>	if not InTransaction then StartTransaction;
4341	>	SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]);
4342	>	Prepare;
4343	>	ExecQuery;
4344	>	try
4345	>	Result := FieldByName('ID').AsInteger
4346	>	finally
4347	>	Close
4348	>	end;
4349	>	finally
4350	>	Free
4351	>	end;
4352	>	end;
4353	>
4354	>	constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
4355	>	begin
4356	>	FOwner := Owner;
4357	>	FIncrement := 1;
4358	>	end;
4359	>
4360	>
4361	>	procedure TIBGenerator.Apply;
4362	>	begin
4363	>	if (FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then
4364	>	Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction);
4365	>	end;
4366	>
4367	>	end.

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