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

Comparing ibx/trunk/runtime/IBCustomDataSet.pas (file contents):
Revision 23 by tony, Fri Mar 13 10:26:52 2015 UTC vs.
Revision 43 by tony, Thu Sep 22 17:10:15 2016 UTC

#	Line 1 | Line 1
1	<	{************************************************************************}
2	<	{                                                                        }
3	<	{       Borland Delphi Visual Component Library                          }
4	<	{       InterBase Express core components                                }
5	<	{                                                                        }
6	<	{       Copyright (c) 1998-2000 Inprise Corporation                      }
7	<	{                                                                        }
8	<	{    InterBase Express is based in part on the product                   }
9	<	{    Free IB Components, written by Gregory H. Deatz for                 }
10	<	{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
11	<	{    Free IB Components is used under license.                           }
12	<	{                                                                        }
13	<	{    The contents of this file are subject to the InterBase              }
14	<	{    Public License Version 1.0 (the "License"); you may not             }
15	<	{    use this file except in compliance with the License. You            }
16	<	{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	<	{    Software distributed under the License is distributed on            }
18	<	{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
19	<	{    express or implied. See the License for the specific language       }
20	<	{    governing rights and limitations under the License.                 }
21	<	{    The Original Code was created by InterBase Software Corporation     }
22	<	{       and its successors.                                              }
23	<	{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
24	<	{       Corporation. All Rights Reserved.                                }
25	<	{    Contributor(s): Jeff Overcash                                       }
26	<	{                                                                        }
27	<	{    IBX For Lazarus (Firebird Express)                                  }
28	<	{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	<	{    Portions created by MWA Software are copyright McCallum Whyman      }
30	<	{    Associates Ltd 2011 - 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, Forms, Controls, IBDatabase,
53	<	IBExternals, IB, IBHeader,  IBSQL, Db,
54	<	IBUtils, IBBlob, IBSQLParser;
55	<
56	<	const
57	<	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
58	<	UniCache           =  2;     { Uni-directional cache is 2 records big }
59	<
60	<	type
61	<	TIBCustomDataSet = class;
62	<	TIBDataSet = class;
63	<
64	<	{ TIBDataSetUpdateObject }
65	<
66	<	TIBDataSetUpdateObject = class(TComponent)
67	<	private
68	<	FRefreshSQL: TStrings;
69	<	procedure SetRefreshSQL(value: TStrings);
70	<	protected
71	<	function GetDataSet: TIBCustomDataSet; virtual; abstract;
72	<	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
73	<	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
74	<	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
75	<	procedure InternalSetParams(Query: TIBSQL; buff: PChar);
76	<	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
77	<	public
78	<	constructor Create(AOwner: TComponent); override;
79	<	destructor Destroy; override;
80	<	published
81	<	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
82	<	end;
83	<
84	<	TBlobDataArray = array[0..0] of TIBBlobStream;
85	<	PBlobDataArray = ^TBlobDataArray;
86	<
87	<	{ TIBCustomDataSet }
88	<	TFieldData = record
89	<	fdDataType: Short;
90	<	fdDataScale: Short;
91	<	fdNullable: Boolean;
92	<	fdIsNull: Boolean;
93	<	fdDataSize: Short;
94	<	fdDataLength: Short;
95	<	fdDataOfs: Integer;
96	<	end;
97	<	PFieldData = ^TFieldData;
98	<
99	<	TCachedUpdateStatus = (
100	<	cusUnmodified, cusModified, cusInserted,
101	<	cusDeleted, cusUninserted
102	<	);
103	<	TIBDBKey = record
104	<	DBKey: array[0..7] of Byte;
105	<	end;
106	<	PIBDBKey = ^TIBDBKey;
107	<
108	<	TRecordData = record
109	<	rdBookmarkFlag: TBookmarkFlag;
110	<	rdFieldCount: Short;
111	<	rdRecordNumber: Integer;
112	<	rdCachedUpdateStatus: TCachedUpdateStatus;
113	<	rdUpdateStatus: TUpdateStatus;
114	<	rdSavedOffset: DWORD;
115	<	rdDBKey: TIBDBKey;
116	<	rdFields: array[1..1] of TFieldData;
117	<	end;
118	<	PRecordData = ^TRecordData;
119	<
120	<	{ TIBStringField allows us to have strings longer than 8196 }
121	<
122	<	TIBStringField = class(TStringField)
123	<	public
124	<	constructor create(AOwner: TComponent); override;
125	<	class procedure CheckTypeSize(Value: Integer); override;
126	<	function GetAsString: string; override;
127	<	function GetAsVariant: Variant; override;
128	<	function GetValue(var Value: string): Boolean;
129	<	procedure SetAsString(const Value: string); override;
130	<	end;
131	<
132	<	{ TIBBCDField }
133	<	{  Actually, there is no BCD involved in this type,
134	<	instead it deals with currency types.
135	<	In IB, this is an encapsulation of Numeric (x, y)
136	<	where x < 18 and y <= 4.
137	<	Note: y > 4 will default to Floats
138	<	}
139	<	TIBBCDField = class(TBCDField)
140	<	protected
141	<	class procedure CheckTypeSize(Value: Integer); override;
142	<	function GetAsCurrency: Currency; override;
143	<	function GetAsString: string; override;
144	<	function GetAsVariant: Variant; override;
145	<	function GetDataSize: Integer; override;
146	<	public
147	<	constructor Create(AOwner: TComponent); override;
148	<	published
149	<	property Size default 8;
150	<	end;
151	<
152	<	TIBDataLink = class(TDetailDataLink)
153	<	private
154	<	FDataSet: TIBCustomDataSet;
155	<	protected
156	<	procedure ActiveChanged; override;
157	<	procedure RecordChanged(Field: TField); override;
158	<	function GetDetailDataSet: TDataSet; override;
159	<	procedure CheckBrowseMode; override;
160	<	public
161	<	constructor Create(ADataSet: TIBCustomDataSet);
162	<	destructor Destroy; override;
163	<	end;
164	<
165	<	TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord);
166	<
167	<	{ TIBGenerator }
168	<
169	<	TIBGenerator = class(TPersistent)
170	<	private
171	<	FOwner: TIBCustomDataSet;
172	<	FApplyOnEvent: TIBGeneratorApplyOnEvent;
173	<	FFieldName: string;
174	<	FGeneratorName: string;
175	<	FIncrement: integer;
176	<	procedure SetIncrement(const AValue: integer);
177	<	protected
178	<	function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer;
179	<	public
180	<	constructor Create(Owner: TIBCustomDataSet);
181	<	procedure Apply;
182	<	property Owner: TIBCustomDataSet read FOwner;
183	<	published
184	<	property Generator: string read FGeneratorName write FGeneratorName;
185	<	property Field: string read FFieldName write FFieldName;
186	<	property Increment: integer read FIncrement write SetIncrement default 1;
187	<	property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
188	<	end;
189	<
190	<	TIBAutoCommit = (acDisabled, acCommitRetaining);
191	<
192	<	{ TIBCustomDataSet }
193	<	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
194	<
195	<	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
196	<	UpdateKind: TUpdateKind; var UpdateAction: TIBUpdateAction)
197	<	of object;
198	<	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
199	<	var UpdateAction: TIBUpdateAction) of object;
200	<
201	<	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
202	<
203	<	TIBCustomDataSet = class(TDataset)
204	<	private
205	<	FAutoCommit: TIBAutoCommit;
206	<	FGenerateParamNames: Boolean;
207	<	FGeneratorField: TIBGenerator;
208	<	FNeedsRefresh: Boolean;
209	<	FForcedRefresh: Boolean;
210	<	FDidActivate: Boolean;
211	<	FIBLoaded: Boolean;
212	<	FBase: TIBBase;
213	<	FBlobCacheOffset: Integer;
214	<	FBlobStreamList: TList;
215	<	FBufferChunks: Integer;
216	<	FBufferCache,
217	<	FOldBufferCache: PChar;
218	<	FBufferChunkSize,
219	<	FCacheSize,
220	<	FOldCacheSize: Integer;
221	<	FFilterBuffer: PChar;
222	<	FBPos,
223	<	FOBPos,
224	<	FBEnd,
225	<	FOBEnd: DWord;
226	<	FCachedUpdates: Boolean;
227	<	FCalcFieldsOffset: Integer;
228	<	FCurrentRecord: Long;
229	<	FDeletedRecords: Long;
230	<	FModelBuffer,
231	<	FOldBuffer: PChar;
232	<	FOpen: Boolean;
233	<	FInternalPrepared: Boolean;
234	<	FQDelete,
235	<	FQInsert,
236	<	FQRefresh,
237	<	FQSelect,
238	<	FQModify: TIBSQL;
239	<	FRecordBufferSize: Integer;
240	<	FRecordCount: Integer;
241	<	FRecordSize: Integer;
242	<	FUniDirectional: Boolean;
243	<	FUpdateMode: TUpdateMode;
244	<	FUpdateObject: TIBDataSetUpdateObject;
245	<	FParamCheck: Boolean;
246	<	FUpdatesPending: Boolean;
247	<	FUpdateRecordTypes: TIBUpdateRecordTypes;
248	<	FMappedFieldPosition: array of Integer;
249	<	FDataLink: TIBDataLink;
250	<
251	<	FBeforeDatabaseDisconnect,
252	<	FAfterDatabaseDisconnect,
253	<	FDatabaseFree: TNotifyEvent;
254	<	FOnUpdateError: TIBUpdateErrorEvent;
255	<	FOnUpdateRecord: TIBUpdateRecordEvent;
256	<	FBeforeTransactionEnd,
257	<	FAfterTransactionEnd,
258	<	FTransactionFree: TNotifyEvent;
259	<	FAliasNameMap: array of string;
260	<	FAliasNameList: array of string;
261	<	FBaseSQLSelect: TStrings;
262	<	FParser: TSelectSQLParser;
263	<	function GetSelectStmtHandle: TISC_STMT_HANDLE;
264	<	procedure SetUpdateMode(const Value: TUpdateMode);
265	<	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
266	<
267	<	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
268	<	procedure AdjustRecordOnInsert(Buffer: Pointer);
269	<	function CanEdit: Boolean;
270	<	function CanInsert: Boolean;
271	<	function CanDelete: Boolean;
272	<	function CanRefresh: Boolean;
273	<	procedure CheckEditState;
274	<	procedure ClearBlobCache;
275	<	procedure CopyRecordBuffer(Source, Dest: Pointer);
276	<	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
277	<	procedure DoAfterDatabaseDisconnect(Sender: TObject);
278	<	procedure DoDatabaseFree(Sender: TObject);
279	<	procedure DoBeforeTransactionEnd(Sender: TObject);
280	<	procedure DoAfterTransactionEnd(Sender: TObject);
281	<	procedure DoTransactionFree(Sender: TObject);
282	<	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
283	<	Buffer: PChar);
284	<	function GetDatabase: TIBDatabase;
285	<	function GetDBHandle: PISC_DB_HANDLE;
286	<	function GetDeleteSQL: TStrings;
287	<	function GetInsertSQL: TStrings;
288	<	function GetSQLParams: TIBXSQLDA;
289	<	function GetRefreshSQL: TStrings;
290	<	function GetSelectSQL: TStrings;
291	<	function GetStatementType: TIBSQLTypes;
292	<	function GetModifySQL: TStrings;
293	<	function GetTransaction: TIBTransaction;
294	<	function GetTRHandle: PISC_TR_HANDLE;
295	<	function GetParser: TSelectSQLParser;
296	<	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
297	<	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
298	<	Options: TLocateOptions): Boolean; virtual;
299	<	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
300	<	procedure InternalRevertRecord(RecordNumber: Integer); virtual;
301	<	function IsVisible(Buffer: PChar): Boolean;
302	<	procedure SaveOldBuffer(Buffer: PChar);
303	<	procedure SetBufferChunks(Value: Integer);
304	<	procedure SetDatabase(Value: TIBDatabase);
305	<	procedure SetDeleteSQL(Value: TStrings);
306	<	procedure SetInsertSQL(Value: TStrings);
307	<	procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
308	<	procedure SetRefreshSQL(Value: TStrings);
309	<	procedure SetSelectSQL(Value: TStrings);
310	<	procedure SetModifySQL(Value: TStrings);
311	<	procedure SetTransaction(Value: TIBTransaction);
312	<	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
313	<	procedure SetUniDirectional(Value: Boolean);
314	<	procedure RefreshParams;
315	<	procedure SQLChanging(Sender: TObject); virtual;
316	<	function AdjustPosition(FCache: PChar; Offset: DWORD;
317	<	Origin: Integer): DWORD;
318	<	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
319	<	Buffer: PChar);
320	<	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
321	<	ReadOldBuffer: Boolean);
322	<	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
323	<	Buffer: PChar);
324	<	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
325	<	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
326	<	DoCheck: Boolean): TGetResult; virtual;
327	<
328	<	protected
329	<	procedure ActivateConnection;
330	<	function ActivateTransaction: Boolean;
331	<	procedure DeactivateTransaction;
332	<	procedure CheckDatasetClosed;
333	<	procedure CheckDatasetOpen;
334	<	function CreateParser: TSelectSQLParser; virtual;
335	<	procedure FieldDefsFromQuery(SourceQuery: TIBSQL);
336	<	function GetActiveBuf: PChar;
337	<	procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
338	<	procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
339	<	procedure InternalPrepare; virtual;
340	<	procedure InternalUnPrepare; virtual;
341	<	procedure InternalExecQuery; virtual;
342	<	procedure InternalRefreshRow; virtual;
343	<	procedure InternalSetParamsFromCursor; virtual;
344	<	procedure CheckNotUniDirectional;
345	<
346	<	(*    { IProviderSupport }
347	<	procedure PSEndTransaction(Commit: Boolean); override;
348	<	function PSExecuteStatement(const ASQL: string; AParams: TParams;
349	<	ResultSet: Pointer = nil): Integer; override;
350	<	function PsGetTableName: string; override;
351	<	function PSGetQuoteChar: string; override;
352	<	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
353	<	function PSInTransaction: Boolean; override;
354	<	function PSIsSQLBased: Boolean; override;
355	<	function PSIsSQLSupported: Boolean; override;
356	<	procedure PSStartTransaction; override;
357	<	procedure PSReset; override;
358	<	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
359	<	*)
360	<	{ TDataSet support }
361	<	procedure InternalInsert; override;
362	<	procedure InitRecord(Buffer: PChar); override;
363	<	procedure Disconnect; virtual;
364	<	function ConstraintsStored: Boolean;
365	<	procedure ClearCalcFields(Buffer: PChar); override;
366	<	function AllocRecordBuffer: PChar; override;
367	<	procedure DoBeforeDelete; override;
368	<	procedure DoAfterDelete; override;
369	<	procedure DoBeforeEdit; override;
370	<	procedure DoBeforeInsert; override;
371	<	procedure DoAfterInsert; override;
372	<	procedure DoBeforeOpen; override;
373	<	procedure DoBeforePost; override;
374	<	procedure DoAfterPost; override;
375	<	procedure FreeRecordBuffer(var Buffer: PChar); override;
376	<	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
377	<	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
378	<	function GetCanModify: Boolean; override;
379	<	function GetDataSource: TDataSource; override;
380	<	function GetDBAliasName(FieldNo: integer): string;
381	<	function GetFieldDefFromAlias(aliasName: string): TFieldDef;
382	<	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
383	<	function GetRecNo: Integer; override;
384	<	function GetRecord(Buffer: PChar; GetMode: TGetMode;
385	<	DoCheck: Boolean): TGetResult; override;
386	<	function GetRecordCount: Integer; override;
387	<	function GetRecordSize: Word; override;
388	<	procedure InternalAutoCommit;
389	<	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
390	<	procedure InternalCancel; override;
391	<	procedure InternalClose; override;
392	<	procedure InternalDelete; override;
393	<	procedure InternalFirst; override;
394	<	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
395	<	procedure InternalGotoBookmark(Bookmark: Pointer); override;
396	<	procedure InternalHandleException; override;
397	<	procedure InternalInitFieldDefs; override;
398	<	procedure InternalInitRecord(Buffer: PChar); override;
399	<	procedure InternalLast; override;
400	<	procedure InternalOpen; override;
401	<	procedure InternalPost; override;
402	<	procedure InternalRefresh; override;
403	<	procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
404	<	procedure InternalSetToRecord(Buffer: PChar); override;
405	<	function IsCursorOpen: Boolean; override;
406	<	procedure Loaded; override;
407	<	procedure ReQuery;
408	<	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
409	<	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
410	<	procedure SetCachedUpdates(Value: Boolean);
411	<	procedure SetDataSource(Value: TDataSource);
412	<	procedure SetGenerateParamNames(AValue: Boolean); virtual;
413	<	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
414	<	procedure SetFieldData(Field : TField; Buffer : Pointer;
415	<	NativeFormat : Boolean); overload; override;
416	<	procedure SetRecNo(Value: Integer); override;
417	<
418	<	protected
419	<	{Likely to be made public by descendant classes}
420	<	property AutoCommit: TIBAutoCommit read FAutoCommit write FAutoCommit default acDisabled;
421	<	property SQLParams: TIBXSQLDA read GetSQLParams;
422	<	property Params: TIBXSQLDA read GetSQLParams;
423	<	property InternalPrepared: Boolean read FInternalPrepared;
424	<	property QDelete: TIBSQL read FQDelete;
425	<	property QInsert: TIBSQL read FQInsert;
426	<	property QRefresh: TIBSQL read FQRefresh;
427	<	property QSelect: TIBSQL read FQSelect;
428	<	property QModify: TIBSQL read FQModify;
429	<	property StatementType: TIBSQLTypes read GetStatementType;
430	<	property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle;
431	<
432	<	{Likely to be made published by descendant classes}
433	<	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
434	<	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
435	<	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
436	<	property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
437	<	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
438	<	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
439	<	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
440	<	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
441	<	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
442	<	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
443	<	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
444	<	property Parser: TSelectSQLParser read GetParser;
445	<	property BaseSQLSelect: TStrings read FBaseSQLSelect;
446	<
447	<	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
448	<	write FBeforeDatabaseDisconnect;
449	<	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
450	<	write FAfterDatabaseDisconnect;
451	<	property DatabaseFree: TNotifyEvent read FDatabaseFree
452	<	write FDatabaseFree;
453	<	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
454	<	write FBeforeTransactionEnd;
455	<	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
456	<	write FAfterTransactionEnd;
457	<	property TransactionFree: TNotifyEvent read FTransactionFree
458	<	write FTransactionFree;
459	<
460	<	public
461	<	constructor Create(AOwner: TComponent); override;
462	<	destructor Destroy; override;
463	<	procedure ApplyUpdates;
464	<	function CachedUpdateStatus: TCachedUpdateStatus;
465	<	procedure CancelUpdates;
466	<	function GetFieldPosition(AliasName: string): integer;
467	<	procedure FetchAll;
468	<	function LocateNext(const KeyFields: string; const KeyValues: Variant;
469	<	Options: TLocateOptions): Boolean;
470	<	procedure RecordModified(Value: Boolean);
471	<	procedure RevertRecord;
472	<	procedure Undelete;
473	<	procedure ResetParser;
474	<	function HasParser: boolean;
475	<
476	<	{ TDataSet support methods }
477	<	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
478	<	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
479	<	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
480	<	function GetCurrentRecord(Buffer: PChar): Boolean; override;
481	<	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
482	<	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
483	<	function GetFieldData(Field : TField; Buffer : Pointer;
484	<	NativeFormat : Boolean) : Boolean; overload; override;
485	<	property GenerateParamNames: Boolean read FGenerateParamNames write SetGenerateParamNames;
486	<	function Locate(const KeyFields: string; const KeyValues: Variant;
487	<	Options: TLocateOptions): Boolean; override;
488	<	function Lookup(const KeyFields: string; const KeyValues: Variant;
489	<	const ResultFields: string): Variant; override;
490	<	function UpdateStatus: TUpdateStatus; override;
491	<	function IsSequenced: Boolean; override;
492	<	function ParamByName(ParamName: String): TIBXSQLVAR;
493	<	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
494	<	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
495	<	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
496	<	property UpdatesPending: Boolean read FUpdatesPending;
497	<	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
498	<	write SetUpdateRecordTypes;
499	<
500	<	published
501	<	property Database: TIBDatabase read GetDatabase write SetDatabase;
502	<	property Transaction: TIBTransaction read GetTransaction
503	<	write SetTransaction;
504	<	property ForcedRefresh: Boolean read FForcedRefresh
505	<	write FForcedRefresh default False;
506	<	property AutoCalcFields;
507	<
508	<	property AfterCancel;
509	<	property AfterClose;
510	<	property AfterDelete;
511	<	property AfterEdit;
512	<	property AfterInsert;
513	<	property AfterOpen;
514	<	property AfterPost;
515	<	property AfterRefresh;
516	<	property AfterScroll;
517	<	property BeforeCancel;
518	<	property BeforeClose;
519	<	property BeforeDelete;
520	<	property BeforeEdit;
521	<	property BeforeInsert;
522	<	property BeforeOpen;
523	<	property BeforePost;
524	<	property BeforeRefresh;
525	<	property BeforeScroll;
526	<	property OnCalcFields;
527	<	property OnDeleteError;
528	<	property OnEditError;
529	<	property OnNewRecord;
530	<	property OnPostError;
531	<	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
532	<	write FOnUpdateError;
533	<	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
534	<	write FOnUpdateRecord;
535	<	end;
536	<
537	<	TIBParserDataSet = class(TIBCustomDataSet)
538	<	public
539	<	property Parser;
540	<	end;
541	<
542	<	TIBDataSet = class(TIBParserDataSet)
543	<	private
544	<	function GetPrepared: Boolean;
545	<
546	<	protected
547	<	procedure SetFiltered(Value: Boolean); override;
548	<	procedure InternalOpen; override;
549	<
550	<	public
551	<	procedure Prepare;
552	<	procedure UnPrepare;
553	<	procedure BatchInput(InputObject: TIBBatchInput);
554	<	procedure BatchOutput(OutputObject: TIBBatchOutput);
555	<	procedure ExecSQL;
556	<
557	<	public
558	<	property Params;
559	<	property Prepared : Boolean read GetPrepared;
560	<	property QDelete;
561	<	property QInsert;
562	<	property QRefresh;
563	<	property QSelect;
564	<	property QModify;
565	<	property StatementType;
566	<	property SelectStmtHandle;
567	<	property BaseSQLSelect;
568	<
569	<	published
570	<	{ TIBCustomDataSet }
571	<	property AutoCommit;
572	<	property BufferChunks;
573	<	property CachedUpdates;
574	<	property DeleteSQL;
575	<	property InsertSQL;
576	<	property RefreshSQL;
577	<	property SelectSQL;
578	<	property ModifySQL;
579	<	property GeneratorField;
580	<	property GenerateParamNames;
581	<	property ParamCheck;
582	<	property UniDirectional;
583	<	property Filtered;
584	<
585	<	property BeforeDatabaseDisconnect;
586	<	property AfterDatabaseDisconnect;
587	<	property DatabaseFree;
588	<	property BeforeTransactionEnd;
589	<	property AfterTransactionEnd;
590	<	property TransactionFree;
591	<
592	<	{ TIBDataSet }
593	<	property Active;
594	<	property AutoCalcFields;
595	<	property DataSource read GetDataSource write SetDataSource;
596	<
597	<	property AfterCancel;
598	<	property AfterClose;
599	<	property AfterDelete;
600	<	property AfterEdit;
601	<	property AfterInsert;
602	<	property AfterOpen;
603	<	property AfterPost;
604	<	property AfterScroll;
605	<	property BeforeCancel;
606	<	property BeforeClose;
607	<	property BeforeDelete;
608	<	property BeforeEdit;
609	<	property BeforeInsert;
610	<	property BeforeOpen;
611	<	property BeforePost;
612	<	property BeforeScroll;
613	<	property OnCalcFields;
614	<	property OnDeleteError;
615	<	property OnEditError;
616	<	property OnFilterRecord;
617	<	property OnNewRecord;
618	<	property OnPostError;
619	<	end;
620	<
621	<	{ TIBDSBlobStream }
622	<	TIBDSBlobStream = class(TStream)
623	<	protected
624	<	FField: TField;
625	<	FBlobStream: TIBBlobStream;
626	<	public
627	<	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
628	<	Mode: TBlobStreamMode);
629	<	function Read(var Buffer; Count: Longint): Longint; override;
630	<	function Seek(Offset: Longint; Origin: Word): Longint; override;
631	<	procedure SetSize(NewSize: Longint); override;
632	<	function Write(const Buffer; Count: Longint): Longint; override;
633	<	end;
634	<
635	<	const
636	<	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
637	<	nil,                { ftUnknown }
638	<	TIBStringField,     { ftString }
639	<	TSmallintField,     { ftSmallint }
640	<	TIntegerField,      { ftInteger }
641	<	TWordField,         { ftWord }
642	<	TBooleanField,      { ftBoolean }
643	<	TFloatField,        { ftFloat }
644	<	TCurrencyField,     { ftCurrency }
645	<	TIBBCDField,        { ftBCD }
646	<	TDateField,         { ftDate }
647	<	TTimeField,         { ftTime }
648	<	TDateTimeField,     { ftDateTime }
649	<	TBytesField,        { ftBytes }
650	<	TVarBytesField,     { ftVarBytes }
651	<	TAutoIncField,      { ftAutoInc }
652	<	TBlobField,         { ftBlob }
653	<	TMemoField,         { ftMemo }
654	<	TGraphicField,      { ftGraphic }
655	<	TBlobField,         { ftFmtMemo }
656	<	TBlobField,         { ftParadoxOle }
657	<	TBlobField,         { ftDBaseOle }
658	<	TBlobField,         { ftTypedBinary }
659	<	nil,                { ftCursor }
660	<	TStringField,       { ftFixedChar }
661	<	TWideStringField,    { ftWideString }
662	<	TLargeIntField,     { ftLargeInt }
663	<	nil,          { ftADT }
664	<	nil,        { ftArray }
665	<	nil,    { ftReference }
666	<	nil,     { ftDataSet }
667	<	TBlobField,         { ftOraBlob }
668	<	TMemoField,         { ftOraClob }
669	<	TVariantField,      { ftVariant }
670	<	nil,    { ftInterface }
671	<	nil,     { ftIDispatch }
672	<	TGuidField,        { ftGuid }
673	<	TDateTimeField,    {ftTimestamp}
674	<	TIBBCDField,       {ftFMTBcd}
675	<	nil,  {ftFixedWideChar}
676	<	TWideMemoField);   {ftWideMemo}
677	<	(*
678	<	TADTField,          { ftADT }
679	<	TArrayField,        { ftArray }
680	<	TReferenceField,    { ftReference }
681	<	TDataSetField,     { ftDataSet }
682	<	TBlobField,         { ftOraBlob }
683	<	TMemoField,         { ftOraClob }
684	<	TVariantField,      { ftVariant }
685	<	TInterfaceField,    { ftInterface }
686	<	TIDispatchField,     { ftIDispatch }
687	<	TGuidField);        { ftGuid } *)
688	<	(*var
689	<	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
690	<
691	<	implementation
692	<
693	<	uses IBIntf, Variants, FmtBCD;
694	<
695	<	const FILE_BEGIN = 0;
696	<	FILE_CURRENT = 1;
697	<	FILE_END = 2;
698	<
699	<	type
700	<
701	<	TFieldNode = class(TObject)
702	<	protected
703	<	FieldName : String;
704	<	COMPUTED_BLR : Boolean;
705	<	DEFAULT_VALUE : boolean;
706	<	NextField : TFieldNode;
707	<	end;
708	<
709	<	TRelationNode = class(TObject)
710	<	protected
711	<	RelationName : String;
712	<	FieldNodes : TFieldNode;
713	<	NextRelation : TRelationNode;
714	<	end;
715	<
716	<
717	<	{ TIBStringField}
718	<
719	<	constructor TIBStringField.Create(AOwner: TComponent);
720	<	begin
721	<	inherited Create(AOwner);
722	<	end;
723	<
724	<	class procedure TIBStringField.CheckTypeSize(Value: Integer);
725	<	begin
726	<	{ don't check string size. all sizes valid }
727	<	end;
728	<
729	<	function TIBStringField.GetAsString: string;
730	<	begin
731	<	if not GetValue(Result) then Result := '';
732	<	end;
733	<
734	<	function TIBStringField.GetAsVariant: Variant;
735	<	var
736	<	S: string;
737	<	begin
738	<	if GetValue(S) then Result := S else Result := Null;
739	<	end;
740	<
741	<	function TIBStringField.GetValue(var Value: string): Boolean;
742	<	var
743	<	Buffer: PChar;
744	<	begin
745	<	Buffer := nil;
746	<	IBAlloc(Buffer, 0, Size + 1);
747	<	try
748	<	Result := GetData(Buffer);
749	<	if Result then
750	<	begin
751	<	Value := string(Buffer);
752	<	if Transliterate and (Value <> '') then
753	<	DataSet.Translate(PChar(Value), PChar(Value), False);
754	<	end
755	<	finally
756	<	FreeMem(Buffer);
757	<	end;
758	<	end;
759	<
760	<	procedure TIBStringField.SetAsString(const Value: string);
761	<	var
762	<	Buffer: PChar;
763	<	begin
764	<	Buffer := nil;
765	<	IBAlloc(Buffer, 0, Size + 1);
766	<	try
767	<	StrLCopy(Buffer, PChar(Value), Size);
768	<	if Transliterate then
769	<	DataSet.Translate(Buffer, Buffer, True);
770	<	SetData(Buffer);
771	<	finally
772	<	FreeMem(Buffer);
773	<	end;
774	<	end;
775	<
776	<	{ TIBBCDField }
777	<
778	<	constructor TIBBCDField.Create(AOwner: TComponent);
779	<	begin
780	<	inherited Create(AOwner);
781	<	SetDataType(ftBCD);
782	<	Size := 8;
783	<	end;
784	<
785	<	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
786	<	begin
787	<	{ No need to check as the base type is currency, not BCD }
788	<	end;
789	<
790	<	function TIBBCDField.GetAsCurrency: Currency;
791	<	begin
792	<	if not GetValue(Result) then
793	<	Result := 0;
794	<	end;
795	<
796	<	function TIBBCDField.GetAsString: string;
797	<	var
798	<	C: System.Currency;
799	<	begin
800	<	if GetValue(C) then
801	<	Result := CurrToStr(C)
802	<	else
803	<	Result := '';
804	<	end;
805	<
806	<	function TIBBCDField.GetAsVariant: Variant;
807	<	var
808	<	C: System.Currency;
809	<	begin
810	<	if GetValue(C) then
811	<	Result := C
812	<	else
813	<	Result := Null;
814	<	end;
815	<
816	<	function TIBBCDField.GetDataSize: Integer;
817	<	begin
818	<	{$IFDEF TBCDFIELD_IS_BCD}
819	<	Result := 8;
820	<	{$ELSE}
821	<	Result := inherited GetDataSize
822	<	{$ENDIF}
823	<	end;
824	<
825	<	{ TIBDataLink }
826	<
827	<	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
828	<	begin
829	<	inherited Create;
830	<	FDataSet := ADataSet;
831	<	end;
832	<
833	<	destructor TIBDataLink.Destroy;
834	<	begin
835	<	FDataSet.FDataLink := nil;
836	<	inherited Destroy;
837	<	end;
838	<
839	<
840	<	procedure TIBDataLink.ActiveChanged;
841	<	begin
842	<	if FDataSet.Active then
843	<	FDataSet.RefreshParams;
844	<	end;
845	<
846	<
847	<	function TIBDataLink.GetDetailDataSet: TDataSet;
848	<	begin
849	<	Result := FDataSet;
850	<	end;
851	<
852	<	procedure TIBDataLink.RecordChanged(Field: TField);
853	<	begin
854	<	if (Field = nil) and FDataSet.Active then
855	<	FDataSet.RefreshParams;
856	<	end;
857	<
858	<	procedure TIBDataLink.CheckBrowseMode;
859	<	begin
860	<	if FDataSet.Active then
861	<	FDataSet.CheckBrowseMode;
862	<	end;
863	<
864	<	{ TIBCustomDataSet }
865	<
866	<	constructor TIBCustomDataSet.Create(AOwner: TComponent);
867	<	begin
868	<	inherited Create(AOwner);
869	<	FIBLoaded := False;
870	<	CheckIBLoaded;
871	<	FIBLoaded := True;
872	<	FBase := TIBBase.Create(Self);
873	<	FCurrentRecord := -1;
874	<	FDeletedRecords := 0;
875	<	FUniDirectional := False;
876	<	FBufferChunks := BufferCacheSize;
877	<	FBlobStreamList := TList.Create;
878	<	FGeneratorField := TIBGenerator.Create(self);
879	<	FDataLink := TIBDataLink.Create(Self);
880	<	FQDelete := TIBSQL.Create(Self);
881	<	FQDelete.OnSQLChanging := SQLChanging;
882	<	FQDelete.GoToFirstRecordOnExecute := False;
883	<	FQInsert := TIBSQL.Create(Self);
884	<	FQInsert.OnSQLChanging := SQLChanging;
885	<	FQInsert.GoToFirstRecordOnExecute := False;
886	<	FQRefresh := TIBSQL.Create(Self);
887	<	FQRefresh.OnSQLChanging := SQLChanging;
888	<	FQRefresh.GoToFirstRecordOnExecute := False;
889	<	FQSelect := TIBSQL.Create(Self);
890	<	FQSelect.OnSQLChanging := SQLChanging;
891	<	FQSelect.GoToFirstRecordOnExecute := False;
892	<	FQModify := TIBSQL.Create(Self);
893	<	FQModify.OnSQLChanging := SQLChanging;
894	<	FQModify.GoToFirstRecordOnExecute := False;
895	<	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
896	<	FParamCheck := True;
897	<	FGenerateParamNames := False;
898	<	FForcedRefresh := False;
899	<	FAutoCommit:= acDisabled;
900	<	{Bookmark Size is Integer for IBX}
901	<	BookmarkSize := SizeOf(Integer);
902	<	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
903	<	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
904	<	FBase.OnDatabaseFree := DoDatabaseFree;
905	<	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
906	<	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
907	<	FBase.OnTransactionFree := DoTransactionFree;
908	<	if AOwner is TIBDatabase then
909	<	Database := TIBDatabase(AOwner)
910	<	else
911	<	if AOwner is TIBTransaction then
912	<	Transaction := TIBTransaction(AOwner);
913	<	FBaseSQLSelect := TStringList.Create;
914	<	end;
915	<
916	<	destructor TIBCustomDataSet.Destroy;
917	<	begin
918	<	if Active then Active := false;
919	<	if FIBLoaded then
920	<	begin
921	<	if assigned(FGeneratorField) then FGeneratorField.Free;
922	<	FDataLink.Free;
923	<	FBase.Free;
924	<	ClearBlobCache;
925	<	FBlobStreamList.Free;
926	<	FreeMem(FBufferCache);
927	<	FBufferCache := nil;
928	<	FreeMem(FOldBufferCache);
929	<	FOldBufferCache := nil;
930	<	FCacheSize := 0;
931	<	FOldCacheSize := 0;
932	<	FMappedFieldPosition := nil;
933	<	end;
934	<	if assigned(FBaseSQLSelect) then FBaseSQLSelect.Free;
935	<	if assigned(FParser) then FParser.Free;
936	<	inherited Destroy;
937	<	end;
938	<
939	<	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
940	<	TGetResult;
941	<	begin
942	<	while not IsVisible(Buffer) do
943	<	begin
944	<	if GetMode = gmPrior then
945	<	begin
946	<	Dec(FCurrentRecord);
947	<	if FCurrentRecord = -1 then
948	<	begin
949	<	result := grBOF;
950	<	exit;
951	<	end;
952	<	ReadRecordCache(FCurrentRecord, Buffer, False);
953	<	end
954	<	else begin
955	<	Inc(FCurrentRecord);
956	<	if (FCurrentRecord = FRecordCount) then
957	<	begin
958	<	if (not FQSelect.EOF) and (FQSelect.Next <> nil) then
959	<	begin
960	<	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
961	<	Inc(FRecordCount);
962	<	end
963	<	else begin
964	<	result := grEOF;
965	<	exit;
966	<	end;
967	<	end
968	<	else
969	<	ReadRecordCache(FCurrentRecord, Buffer, False);
970	<	end;
971	<	end;
972	<	result := grOK;
973	<	end;
974	<
975	<	procedure TIBCustomDataSet.ApplyUpdates;
976	<	var
977	<	{$IF FPC_FULLVERSION >= 20700 }
978	<	CurBookmark: TBookmark;
979	<	{$ELSE}
980	<	CurBookmark: string;
981	<	{$ENDIF}
982	<	Buffer: PRecordData;
983	<	CurUpdateTypes: TIBUpdateRecordTypes;
984	<	UpdateAction: TIBUpdateAction;
985	<	UpdateKind: TUpdateKind;
986	<	bRecordsSkipped: Boolean;
987	<
988	<	procedure GetUpdateKind;
989	<	begin
990	<	case Buffer^.rdCachedUpdateStatus of
991	<	cusModified:
992	<	UpdateKind := ukModify;
993	<	cusInserted:
994	<	UpdateKind := ukInsert;
995	<	else
996	<	UpdateKind := ukDelete;
997	<	end;
998	<	end;
999	<
1000	<	procedure ResetBufferUpdateStatus;
1001	<	begin
1002	<	case Buffer^.rdCachedUpdateStatus of
1003	<	cusModified:
1004	<	begin
1005	<	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1006	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1007	<	end;
1008	<	cusInserted:
1009	<	begin
1010	<	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1011	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1012	<	end;
1013	<	cusDeleted:
1014	<	begin
1015	<	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
1016	<	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1017	<	end;
1018	<	end;
1019	<	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
1020	<	end;
1021	<
1022	<	procedure UpdateUsingOnUpdateRecord;
1023	<	begin
1024	<	UpdateAction := uaFail;
1025	<	try
1026	<	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
1027	<	except
1028	<	on E: Exception do
1029	<	begin
1030	<	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1031	<	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1032	<	if UpdateAction = uaFail then
1033	<	raise;
1034	<	end;
1035	<	end;
1036	<	end;
1037	<
1038	<	procedure UpdateUsingUpdateObject;
1039	<	begin
1040	<	try
1041	<	FUpdateObject.Apply(UpdateKind,PChar(Buffer));
1042	<	ResetBufferUpdateStatus;
1043	<	except
1044	<	on E: Exception do
1045	<	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1046	<	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1047	<	end;
1048	<	end;
1049	<
1050	<	procedure UpdateUsingInternalquery;
1051	<	begin
1052	<	try
1053	<	case Buffer^.rdCachedUpdateStatus of
1054	<	cusModified:
1055	<	InternalPostRecord(FQModify, Buffer);
1056	<	cusInserted:
1057	<	InternalPostRecord(FQInsert, Buffer);
1058	<	cusDeleted:
1059	<	InternalDeleteRecord(FQDelete, Buffer);
1060	<	end;
1061	<	except
1062	<	on E: EIBError do begin
1063	<	UpdateAction := uaFail;
1064	<	if Assigned(FOnUpdateError) then
1065	<	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
1066	<	case UpdateAction of
1067	<	uaFail: raise;
1068	<	uaAbort: SysUtils.Abort;
1069	<	uaSkip: bRecordsSkipped := True;
1070	<	end;
1071	<	end;
1072	<	end;
1073	<	end;
1074	<
1075	<	begin
1076	<	if State in [dsEdit, dsInsert] then
1077	<	Post;
1078	<	FBase.CheckDatabase;
1079	<	FBase.CheckTransaction;
1080	<	DisableControls;
1081	<	CurBookmark := Bookmark;
1082	<	CurUpdateTypes := FUpdateRecordTypes;
1083	<	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1084	<	try
1085	<	First;
1086	<	bRecordsSkipped := False;
1087	<	while not EOF do
1088	<	begin
1089	<	Buffer := PRecordData(GetActiveBuf);
1090	<	GetUpdateKind;
1091	<	UpdateAction := uaApply;
1092	<	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
1093	<	begin
1094	<	if (Assigned(FOnUpdateRecord)) then
1095	<	UpdateUsingOnUpdateRecord
1096	<	else
1097	<	if Assigned(FUpdateObject) then
1098	<	UpdateUsingUpdateObject;
1099	<	case UpdateAction of
1100	<	uaFail:
1101	<	IBError(ibxeUserAbort, [nil]);
1102	<	uaAbort:
1103	<	SysUtils.Abort;
1104	<	uaApplied:
1105	<	ResetBufferUpdateStatus;
1106	<	uaSkip:
1107	<	bRecordsSkipped := True;
1108	<	uaRetry:
1109	<	Continue;
1110	<	end;
1111	<	end;
1112	<	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
1113	<	begin
1114	<	UpdateUsingInternalquery;
1115	<	UpdateAction := uaApplied;
1116	<	end;
1117	<	Next;
1118	<	end;
1119	<	FUpdatesPending := bRecordsSkipped;
1120	<	finally
1121	<	FUpdateRecordTypes := CurUpdateTypes;
1122	<	Bookmark := CurBookmark;
1123	<	EnableControls;
1124	<	end;
1125	<	end;
1126	<
1127	<	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1128	<	begin
1129	<	FQSelect.BatchInput(InputObject);
1130	<	end;
1131	<
1132	<	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1133	<	var
1134	<	Qry: TIBSQL;
1135	<	begin
1136	<	Qry := TIBSQL.Create(Self);
1137	<	try
1138	<	Qry.Database := FBase.Database;
1139	<	Qry.Transaction := FBase.Transaction;
1140	<	Qry.SQL.Assign(FQSelect.SQL);
1141	<	Qry.BatchOutput(OutputObject);
1142	<	finally
1143	<	Qry.Free;
1144	<	end;
1145	<	end;
1146	<
1147	<	procedure TIBCustomDataSet.CancelUpdates;
1148	<	var
1149	<	CurUpdateTypes: TIBUpdateRecordTypes;
1150	<	begin
1151	<	if State in [dsEdit, dsInsert] then
1152	<	Post;
1153	<	if FCachedUpdates and FUpdatesPending then
1154	<	begin
1155	<	DisableControls;
1156	<	CurUpdateTypes := UpdateRecordTypes;
1157	<	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1158	<	try
1159	<	First;
1160	<	while not EOF do
1161	<	begin
1162	<	if UpdateStatus = usInserted then
1163	<	RevertRecord
1164	<	else
1165	<	begin
1166	<	RevertRecord;
1167	<	Next;
1168	<	end;
1169	<	end;
1170	<	finally
1171	<	UpdateRecordTypes := CurUpdateTypes;
1172	<	First;
1173	<	FUpdatesPending := False;
1174	<	EnableControls;
1175	<	end;
1176	<	end;
1177	<	end;
1178	<
1179	<	function TIBCustomDataSet.GetFieldPosition(AliasName: string): integer;
1180	<	var i: integer;
1181	<	Prepared: boolean;
1182	<	begin
1183	<	Result := 0;
1184	<	Prepared := FInternalPrepared;
1185	<	if not Prepared then
1186	<	InternalPrepare;
1187	<	try
1188	<	for i := 0 to Length(FAliasNameList) - 1 do
1189	<	if FAliasNameList[i] = AliasName then
1190	<	begin
1191	<	Result := i + 1;
1192	<	Exit
1193	<	end;
1194	<	finally
1195	<	if not Prepared then
1196	<	InternalUnPrepare;
1197	<	end;
1198	<	end;
1199	<
1200	<	procedure TIBCustomDataSet.ActivateConnection;
1201	<	begin
1202	<	if not Assigned(Database) then
1203	<	IBError(ibxeDatabaseNotAssigned, [nil]);
1204	<	if not Assigned(Transaction) then
1205	<	IBError(ibxeTransactionNotAssigned, [nil]);
1206	<	if not Database.Connected then Database.Open;
1207	<	end;
1208	<
1209	<	function TIBCustomDataSet.ActivateTransaction: Boolean;
1210	<	begin
1211	<	Result := False;
1212	<	if not Assigned(Transaction) then
1213	<	IBError(ibxeTransactionNotAssigned, [nil]);
1214	<	if not Transaction.Active then
1215	<	begin
1216	<	Result := True;
1217	<	Transaction.StartTransaction;
1218	<	FDidActivate := True;
1219	<	end;
1220	<	end;
1221	<
1222	<	procedure TIBCustomDataSet.DeactivateTransaction;
1223	<	var
1224	<	i: Integer;
1225	<	begin
1226	<	if not Assigned(Transaction) then
1227	<	IBError(ibxeTransactionNotAssigned, [nil]);
1228	<	with Transaction do
1229	<	begin
1230	<	for i := 0 to SQLObjectCount - 1 do
1231	<	begin
1232	<	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1233	<	begin
1234	<	if TDataSet(SQLObjects[i].owner).Active then
1235	<	begin
1236	<	FDidActivate := False;
1237	<	exit;
1238	<	end;
1239	<	end;
1240	<	end;
1241	<	end;
1242	<	FInternalPrepared := False;
1243	<	if Transaction.InTransaction then
1244	<	Transaction.Commit;
1245	<	FDidActivate := False;
1246	<	end;
1247	<
1248	<	procedure TIBCustomDataSet.CheckDatasetClosed;
1249	<	begin
1250	<	if FOpen then
1251	<	IBError(ibxeDatasetOpen, [nil]);
1252	<	end;
1253	<
1254	<	procedure TIBCustomDataSet.CheckDatasetOpen;
1255	<	begin
1256	<	if not FOpen then
1257	<	IBError(ibxeDatasetClosed, [nil]);
1258	<	end;
1259	<
1260	<	function TIBCustomDataSet.CreateParser: TSelectSQLParser;
1261	<	begin
1262	<	Result := TSelectSQLParser.Create(self,FBaseSQLSelect);
1263	<	Result.OnSQLChanging := SQLChanging
1264	<	end;
1265	<
1266	<	procedure TIBCustomDataSet.CheckNotUniDirectional;
1267	<	begin
1268	<	if UniDirectional then
1269	<	IBError(ibxeDataSetUniDirectional, [nil]);
1270	<	end;
1271	<
1272	<	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1273	<	begin
1274	<	with PRecordData(Buffer)^ do
1275	<	if (State = dsInsert) and (not Modified) then
1276	<	begin
1277	<	rdRecordNumber := FRecordCount;
1278	<	FCurrentRecord := FRecordCount;
1279	<	end;
1280	<	end;
1281	<
1282	<	function TIBCustomDataSet.CanEdit: Boolean;
1283	<	var
1284	<	Buff: PRecordData;
1285	<	begin
1286	<	Buff := PRecordData(GetActiveBuf);
1287	<	result := (FQModify.SQL.Text <> '') or
1288	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1289	<	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1290	<	(FCachedUpdates));
1291	<	end;
1292	<
1293	<	function TIBCustomDataSet.CanInsert: Boolean;
1294	<	begin
1295	<	result := (FQInsert.SQL.Text <> '') or
1296	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1297	<	end;
1298	<
1299	<	function TIBCustomDataSet.CanDelete: Boolean;
1300	<	begin
1301	<	if (FQDelete.SQL.Text <> '') or
1302	<	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1303	<	result := True
1304	<	else
1305	<	result := False;
1306	<	end;
1307	<
1308	<	function TIBCustomDataSet.CanRefresh: Boolean;
1309	<	begin
1310	<	result := (FQRefresh.SQL.Text <> '') or
1311	<	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1312	<	end;
1313	<
1314	<	procedure TIBCustomDataSet.CheckEditState;
1315	<	begin
1316	<	case State of
1317	<	{ Check all the wsEditMode types }
1318	<	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1319	<	dsNewValue, dsInternalCalc :
1320	<	begin
1321	<	if (State in [dsEdit]) and (not CanEdit) then
1322	<	IBError(ibxeCannotUpdate, [nil]);
1323	<	if (State in [dsInsert]) and (not CanInsert) then
1324	<	IBError(ibxeCannotInsert, [nil]);
1325	<	end;
1326	<	else
1327	<	IBError(ibxeNotEditing, [])
1328	<	end;
1329	<	end;
1330	<
1331	<	procedure TIBCustomDataSet.ClearBlobCache;
1332	<	var
1333	<	i: Integer;
1334	<	begin
1335	<	for i := 0 to FBlobStreamList.Count - 1 do
1336	<	begin
1337	<	TIBBlobStream(FBlobStreamList[i]).Free;
1338	<	FBlobStreamList[i] := nil;
1339	<	end;
1340	<	FBlobStreamList.Pack;
1341	<	end;
1342	<
1343	<	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1344	<	begin
1345	<	Move(Source^, Dest^, FRecordBufferSize);
1346	<	end;
1347	<
1348	<	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1349	<	begin
1350	<	if Active then
1351	<	Active := False;
1352	<	FInternalPrepared := False;
1353	<	if Assigned(FBeforeDatabaseDisconnect) then
1354	<	FBeforeDatabaseDisconnect(Sender);
1355	<	end;
1356	<
1357	<	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1358	<	begin
1359	<	if Assigned(FAfterDatabaseDisconnect) then
1360	<	FAfterDatabaseDisconnect(Sender);
1361	<	end;
1362	<
1363	<	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1364	<	begin
1365	<	if Assigned(FDatabaseFree) then
1366	<	FDatabaseFree(Sender);
1367	<	end;
1368	<
1369	<	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject);
1370	<	begin
1371	<	if Active then
1372	<	Active := False;
1373	<	if FQSelect <> nil then
1374	<	FQSelect.FreeHandle;
1375	<	if FQDelete <> nil then
1376	<	FQDelete.FreeHandle;
1377	<	if FQInsert <> nil then
1378	<	FQInsert.FreeHandle;
1379	<	if FQModify <> nil then
1380	<	FQModify.FreeHandle;
1381	<	if FQRefresh <> nil then
1382	<	FQRefresh.FreeHandle;
1383	<	if Assigned(FBeforeTransactionEnd) then
1384	<	FBeforeTransactionEnd(Sender);
1385	<	end;
1386	<
1387	<	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1388	<	begin
1389	<	if Assigned(FAfterTransactionEnd) then
1390	<	FAfterTransactionEnd(Sender);
1391	<	end;
1392	<
1393	<	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1394	<	begin
1395	<	if Assigned(FTransactionFree) then
1396	<	FTransactionFree(Sender);
1397	<	end;
1398	<
1399	<	{ Read the record from FQSelect.Current into the record buffer
1400	<	Then write the buffer to in memory cache }
1401	<	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
1402	<	RecordNumber: Integer; Buffer: PChar);
1403	<	var
1404	<	p: PRecordData;
1405	<	pbd: PBlobDataArray;
1406	<	i, j: Integer;
1407	<	LocalData: Pointer;
1408	<	LocalDate, LocalDouble: Double;
1409	<	LocalInt: Integer;
1410	<	LocalBool: wordBool;
1411	<	LocalInt64: Int64;
1412	<	LocalCurrency: Currency;
1413	<	FieldsLoaded: Integer;
1414	<	temp: TIBXSQLVAR;
1415	<	begin
1416	<	p := PRecordData(Buffer);
1417	<	{ Make sure blob cache is empty }
1418	<	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
1419	<	if RecordNumber > -1 then
1420	<	for i := 0 to BlobFieldCount - 1 do
1421	<	pbd^[i] := nil;
1422	<	{ Get record information }
1423	<	p^.rdBookmarkFlag := bfCurrent;
1424	<	p^.rdFieldCount := Qry.Current.Count;
1425	<	p^.rdRecordNumber := RecordNumber;
1426	<	p^.rdUpdateStatus := usUnmodified;
1427	<	p^.rdCachedUpdateStatus := cusUnmodified;
1428	<	p^.rdSavedOffset := $FFFFFFFF;
1429	<
1430	<	{ Load up the fields }
1431	<	FieldsLoaded := FQSelect.Current.Count;
1432	<	j := 1;
1433	<	for i := 0 to Qry.Current.Count - 1 do
1434	<	begin
1435	<	if (Qry = FQSelect) then
1436	<	j := i + 1
1437	<	else begin
1438	<	if FieldsLoaded = 0 then
1439	<	break;
1440	<	j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1;
1441	<	if j < 1 then
1442	<	continue
1443	<	else
1444	<	Dec(FieldsLoaded);
1445	<	end;
1446	<	with FQSelect.Current[j - 1].Data^ do
1447	<	if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
1448	<	begin
1449	<	if sqllen <= 8 then
1450	<	p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^;
1451	<	continue;
1452	<	end;
1453	<	if j > 0 then with p^ do
1454	<	begin
1455	<	rdFields[j].fdDataType :=
1456	<	Qry.Current[i].Data^.sqltype and (not 1);
1457	<	rdFields[j].fdDataScale :=
1458	<	Qry.Current[i].Data^.sqlscale;
1459	<	rdFields[j].fdNullable :=
1460	<	(Qry.Current[i].Data^.sqltype and 1 = 1);
1461	<	rdFields[j].fdIsNull :=
1462	<	(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1));
1463	<	LocalData := Qry.Current[i].Data^.sqldata;
1464	<	case rdFields[j].fdDataType of
1465	<	SQL_TIMESTAMP:
1466	<	begin
1467	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1468	<	if RecordNumber >= 0 then
1469	<	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime));
1470	<	LocalData := PChar(@LocalDate);
1471	<	end;
1472	<	SQL_TYPE_DATE:
1473	<	begin
1474	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1475	<	if RecordNumber >= 0 then
1476	<	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date;
1477	<	LocalData := PChar(@LocalInt);
1478	<	end;
1479	<	SQL_TYPE_TIME:
1480	<	begin
1481	<	rdFields[j].fdDataSize := SizeOf(TDateTime);
1482	<	if RecordNumber >= 0 then
1483	<	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time;
1484	<	LocalData := PChar(@LocalInt);
1485	<	end;
1486	<	SQL_SHORT, SQL_LONG:
1487	<	begin
1488	<	if (rdFields[j].fdDataScale = 0) then
1489	<	begin
1490	<	rdFields[j].fdDataSize := SizeOf(Integer);
1491	<	if RecordNumber >= 0 then
1492	<	LocalInt := Qry.Current[i].AsLong;
1493	<	LocalData := PChar(@LocalInt);
1494	<	end
1495	<	else if (rdFields[j].fdDataScale >= (-4)) then
1496	<	begin
1497	<	rdFields[j].fdDataSize := SizeOf(Currency);
1498	<	if RecordNumber >= 0 then
1499	<	LocalCurrency := Qry.Current[i].AsCurrency;
1500	<	LocalData := PChar(@LocalCurrency);
1501	<	end
1502	<	else begin
1503	<	rdFields[j].fdDataSize := SizeOf(Double);
1504	<	if RecordNumber >= 0 then
1505	<	LocalDouble := Qry.Current[i].AsDouble;
1506	<	LocalData := PChar(@LocalDouble);
1507	<	end;
1508	<	end;
1509	<	SQL_INT64:
1510	<	begin
1511	<	if (rdFields[j].fdDataScale = 0) then
1512	<	begin
1513	<	rdFields[j].fdDataSize := SizeOf(Int64);
1514	<	if RecordNumber >= 0 then
1515	<	LocalInt64 := Qry.Current[i].AsInt64;
1516	<	LocalData := PChar(@LocalInt64);
1517	<	end
1518	<	else if (rdFields[j].fdDataScale >= (-4)) then
1519	<	begin
1520	<	rdFields[j].fdDataSize := SizeOf(Currency);
1521	<	if RecordNumber >= 0 then
1522	<	LocalCurrency := Qry.Current[i].AsCurrency;
1523	<	LocalData := PChar(@LocalCurrency);
1524	<	end
1525	<	else begin
1526	<	rdFields[j].fdDataSize := SizeOf(Double);
1527	<	if RecordNumber >= 0 then
1528	<	LocalDouble := Qry.Current[i].AsDouble;
1529	<	LocalData := PChar(@LocalDouble);
1530	<	end
1531	<	end;
1532	<	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
1533	<	begin
1534	<	rdFields[j].fdDataSize := SizeOf(Double);
1535	<	if RecordNumber >= 0 then
1536	<	LocalDouble := Qry.Current[i].AsDouble;
1537	<	LocalData := PChar(@LocalDouble);
1538	<	end;
1539	<	SQL_VARYING:
1540	<	begin
1541	<	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1542	<	rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2);
1543	<	if RecordNumber >= 0 then
1544	<	begin
1545	<	if (rdFields[j].fdDataLength = 0) then
1546	<	LocalData := nil
1547	<	else
1548	<	begin
1549	<	temp :=  Qry.Current[i];
1550	<	LocalData := @temp.Data^.sqldata[2];
1551	<	(*              LocalData := @Qry.Current[i].Data^.sqldata[2];*)
1552	<	end;
1553	<	end;
1554	<	end;
1555	<	SQL_BOOLEAN:
1556	<	begin
1557	<	LocalBool:= false;
1558	<	rdFields[j].fdDataSize := SizeOf(wordBool);
1559	<	if RecordNumber >= 0 then
1560	<	LocalBool := Qry.Current[i].AsBoolean;
1561	<	LocalData := PChar(@LocalBool);
1562	<	end;
1563	<	else { SQL_TEXT, SQL_BLOB, SQL_ARRAY, SQL_QUAD }
1564	<	begin
1565	<	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1566	<	if (rdFields[j].fdDataType = SQL_TEXT) then
1567	<	rdFields[j].fdDataLength := rdFields[j].fdDataSize;
1568	<	end;
1569	<	end;
1570	<	if RecordNumber < 0 then
1571	<	begin
1572	<	rdFields[j].fdIsNull := True;
1573	<	rdFields[j].fdDataOfs := FRecordSize;
1574	<	Inc(FRecordSize, rdFields[j].fdDataSize);
1575	<	end
1576	<	else begin
1577	<	if rdFields[j].fdDataType = SQL_VARYING then
1578	<	begin
1579	<	if LocalData <> nil then
1580	<	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength)
1581	<	end
1582	<	else
1583	<	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize)
1584	<	end;
1585	<	end;
1586	<	end;
1587	<	WriteRecordCache(RecordNumber, PChar(p));
1588	<	end;
1589	<
1590	<	function TIBCustomDataSet.GetActiveBuf: PChar;
1591	<	begin
1592	<	case State of
1593	<	dsBrowse:
1594	<	if IsEmpty then
1595	<	result := nil
1596	<	else
1597	<	result := ActiveBuffer;
1598	<	dsEdit, dsInsert:
1599	<	result := ActiveBuffer;
1600	<	dsCalcFields:
1601	<	result := CalcBuffer;
1602	<	dsFilter:
1603	<	result := FFilterBuffer;
1604	<	dsNewValue:
1605	<	result := ActiveBuffer;
1606	<	dsOldValue:
1607	<	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
1608	<	PRecordData(FOldBuffer)^.rdRecordNumber) then
1609	<	result := FOldBuffer
1610	<	else
1611	<	result := ActiveBuffer;
1612	<	else if not FOpen then
1613	<	result := nil
1614	<	else
1615	<	result := ActiveBuffer;
1616	<	end;
1617	<	end;
1618	<
1619	<	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
1620	<	begin
1621	<	if Active then
1622	<	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
1623	<	else
1624	<	result := cusUnmodified;
1625	<	end;
1626	<
1627	<	function TIBCustomDataSet.GetDatabase: TIBDatabase;
1628	<	begin
1629	<	result := FBase.Database;
1630	<	end;
1631	<
1632	<	function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE;
1633	<	begin
1634	<	result := FBase.DBHandle;
1635	<	end;
1636	<
1637	<	function TIBCustomDataSet.GetDeleteSQL: TStrings;
1638	<	begin
1639	<	result := FQDelete.SQL;
1640	<	end;
1641	<
1642	<	function TIBCustomDataSet.GetInsertSQL: TStrings;
1643	<	begin
1644	<	result := FQInsert.SQL;
1645	<	end;
1646	<
1647	<	function TIBCustomDataSet.GetSQLParams: TIBXSQLDA;
1648	<	begin
1649	<	if not FInternalPrepared then
1650	<	InternalPrepare;
1651	<	result := FQSelect.Params;
1652	<	end;
1653	<
1654	<	function TIBCustomDataSet.GetRefreshSQL: TStrings;
1655	<	begin
1656	<	result := FQRefresh.SQL;
1657	<	end;
1658	<
1659	<	function TIBCustomDataSet.GetSelectSQL: TStrings;
1660	<	begin
1661	<	result := FQSelect.SQL;
1662	<	end;
1663	<
1664	<	function TIBCustomDataSet.GetStatementType: TIBSQLTypes;
1665	<	begin
1666	<	result := FQSelect.SQLType;
1667	<	end;
1668	<
1669	<	function TIBCustomDataSet.GetModifySQL: TStrings;
1670	<	begin
1671	<	result := FQModify.SQL;
1672	<	end;
1673	<
1674	<	function TIBCustomDataSet.GetTransaction: TIBTransaction;
1675	<	begin
1676	<	result := FBase.Transaction;
1677	<	end;
1678	<
1679	<	function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE;
1680	<	begin
1681	<	result := FBase.TRHandle;
1682	<	end;
1683	<
1684	<	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
1685	<	begin
1686	<	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1687	<	FUpdateObject.Apply(ukDelete,Buff)
1688	<	else
1689	<	begin
1690	<	SetInternalSQLParams(FQDelete, Buff);
1691	<	FQDelete.ExecQuery;
1692	<	end;
1693	<	with PRecordData(Buff)^ do
1694	<	begin
1695	<	rdUpdateStatus := usDeleted;
1696	<	rdCachedUpdateStatus := cusUnmodified;
1697	<	end;
1698	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1699	<	end;
1700	<
1701	<	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
1702	<	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1703	<	var
1704	<	keyFieldList: TList;
1705	<	{$IF FPC_FULLVERSION >= 20700 }
1706	<	CurBookmark: TBookmark;
1707	<	{$ELSE}
1708	<	CurBookmark: string;
1709	<	{$ENDIF}
1710	<	fieldValue: Variant;
1711	<	lookupValues: array of variant;
1712	<	i, fieldCount: Integer;
1713	<	fieldValueAsString: string;
1714	<	lookupValueAsString: string;
1715	<	begin
1716	<	keyFieldList := TList.Create;
1717	<	try
1718	<	GetFieldList(keyFieldList, KeyFields);
1719	<	fieldCount := keyFieldList.Count;
1720	<	CurBookmark := Bookmark;
1721	<	result := false;
1722	<	SetLength(lookupValues, fieldCount);
1723	<	if not EOF then
1724	<	begin
1725	<	for i := 0 to fieldCount - 1 do  {expand key values into lookupValues array}
1726	<	begin
1727	<	if VarIsArray(KeyValues) then
1728	<	lookupValues[i] := KeyValues[i]
1729	<	else
1730	<	if i > 0 then
1731	<	lookupValues[i] := NULL
1732	<	else
1733	<	lookupValues[0] := KeyValues;
1734	<
1735	<	{convert to upper case is case insensitive search}
1736	<	if (TField(keyFieldList[i]).DataType = ftString) and
1737	<	not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
1738	<	lookupValues[i] := UpperCase(lookupValues[i]);
1739	<	end;
1740	<	end;
1741	<	while not result and not EOF do   {search for a matching record}
1742	<	begin
1743	<	i := 0;
1744	<	result := true;
1745	<	while result and (i < fieldCount) do
1746	<	{see if all of the key fields matches}
1747	<	begin
1748	<	fieldValue := TField(keyFieldList[i]).Value;
1749	<	result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
1750	<	if result and not VarIsNull(fieldValue) then
1751	<	begin
1752	<	try
1753	<	if TField(keyFieldList[i]).DataType = ftString then
1754	<	begin
1755	<	{strings need special handling because of the locate options that
1756	<	apply to them}
1757	<	fieldValueAsString := TField(keyFieldList[i]).AsString;
1758	<	lookupValueAsString := lookupValues[i];
1759	<	if (loCaseInsensitive in Options) then
1760	<	fieldValueAsString := UpperCase(fieldValueAsString);
1761	<
1762	<	if (loPartialKey in Options) then
1763	<	result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
1764	<	else
1765	<	result := result and (fieldValueAsString = lookupValueAsString);
1766	<	end
1767	<	else
1768	<	result := result and (lookupValues[i] =
1769	<	VarAsType(fieldValue, VarType(lookupValues[i])));
1770	<	except on EVariantError do
1771	<	result := False;
1772	<	end;
1773	<	end;
1774	<	Inc(i);
1775	<	end;
1776	<	if not result then
1777	<	Next;
1778	<	end;
1779	<	if not result then
1780	<	Bookmark := CurBookmark
1781	<	else
1782	<	CursorPosChanged;
1783	<	finally
1784	<	keyFieldList.Free;
1785	<	SetLength(lookupValues,0)
1786	<	end;
1787	<	end;
1788	<
1789	<	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
1790	<	var
1791	<	i, j, k: Integer;
1792	<	pbd: PBlobDataArray;
1793	<	begin
1794	<	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
1795	<	j := 0;
1796	<	for i := 0 to FieldCount - 1 do
1797	<	if Fields[i].IsBlob then
1798	<	begin
1799	<	k := FMappedFieldPosition[Fields[i].FieldNo -1];
1800	<	if pbd^[j] <> nil then
1801	<	begin
1802	<	pbd^[j].Finalize;
1803	<	PISC_QUAD(
1804	<	PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ :=
1805	<	pbd^[j].BlobID;
1806	<	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
1807	<	end;
1808	<	Inc(j);
1809	<	end;
1810	<	if Assigned(FUpdateObject) then
1811	<	begin
1812	<	if (Qry = FQDelete) then
1813	<	FUpdateObject.Apply(ukDelete,Buff)
1814	<	else if (Qry = FQInsert) then
1815	<	FUpdateObject.Apply(ukInsert,Buff)
1816	<	else
1817	<	FUpdateObject.Apply(ukModify,Buff);
1818	<	end
1819	<	else begin
1820	<	SetInternalSQLParams(Qry, Buff);
1821	<	Qry.ExecQuery;
1822	<	end;
1823	<	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
1824	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
1825	<	SetModified(False);
1826	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1827	<	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
1828	<	InternalRefreshRow;
1829	<	end;
1830	<
1831	<	procedure TIBCustomDataSet.InternalRefreshRow;
1832	<	var
1833	<	Buff: PChar;
1834	<	SetCursor: Boolean;
1835	<	ofs: DWORD;
1836	<	Qry: TIBSQL;
1837	<	begin
1838	<	if Assigned(Database) and not Database.SQLHourGlass then
1839	<	SetCursor := False
1840	<	else
1841	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1842	<	if SetCursor then
1843	<	Screen.Cursor := crHourGlass;
1844	<	try
1845	<	Buff := GetActiveBuf;
1846	<	if CanRefresh then
1847	<	begin
1848	<	if Buff <> nil then
1849	<	begin
1850	<	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
1851	<	begin
1852	<	Qry := TIBSQL.Create(self);
1853	<	Qry.Database := Database;
1854	<	Qry.Transaction := Transaction;
1855	<	Qry.GoToFirstRecordOnExecute := False;
1856	<	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
1857	<	end
1858	<	else
1859	<	Qry := FQRefresh;
1860	<	SetInternalSQLParams(Qry, Buff);
1861	<	Qry.ExecQuery;
1862	<	try
1863	<	if (Qry.SQLType = SQLExecProcedure) or
1864	<	(Qry.Next <> nil) then
1865	<	begin
1866	<	ofs := PRecordData(Buff)^.rdSavedOffset;
1867	<	FetchCurrentRecordToBuffer(Qry,
1868	<	PRecordData(Buff)^.rdRecordNumber,
1869	<	Buff);
1870	<	if FCachedUpdates and (ofs <> $FFFFFFFF) then
1871	<	begin
1872	<	PRecordData(Buff)^.rdSavedOffset := ofs;
1873	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
1874	<	SaveOldBuffer(Buff);
1875	<	end;
1876	<	end;
1877	<	finally
1878	<	Qry.Close;
1879	<	end;
1880	<	if Qry <> FQRefresh then
1881	<	Qry.Free;
1882	<	end
1883	<	end
1884	<	else
1885	<	IBError(ibxeCannotRefresh, [nil]);
1886	<	finally
1887	<	if SetCursor and (Screen.Cursor = crHourGlass) then
1888	<	Screen.Cursor := crDefault;
1889	<	end;
1890	<	end;
1891	<
1892	<	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
1893	<	var
1894	<	NewBuffer, OldBuffer: PRecordData;
1895	<
1896	<	begin
1897	<	NewBuffer := nil;
1898	<	OldBuffer := nil;
1899	<	NewBuffer := PRecordData(AllocRecordBuffer);
1900	<	OldBuffer := PRecordData(AllocRecordBuffer);
1901	<	try
1902	<	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
1903	<	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
1904	<	case NewBuffer^.rdCachedUpdateStatus of
1905	<	cusInserted:
1906	<	begin
1907	<	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
1908	<	Inc(FDeletedRecords);
1909	<	end;
1910	<	cusModified,
1911	<	cusDeleted:
1912	<	begin
1913	<	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
1914	<	Dec(FDeletedRecords);
1915	<	CopyRecordBuffer(OldBuffer, NewBuffer);
1916	<	end;
1917	<	end;
1918	<
1919	<	if State in dsEditModes then
1920	<	Cancel;
1921	<
1922	<	WriteRecordCache(RecordNumber, PChar(NewBuffer));
1923	<
1924	<	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
1925	<	ReSync([]);
1926	<	finally
1927	<	FreeRecordBuffer(PChar(NewBuffer));
1928	<	FreeRecordBuffer(PChar(OldBuffer));
1929	<	end;
1930	<	end;
1931	<
1932	<	{ A visible record is one that is not truly deleted,
1933	<	and it is also listed in the FUpdateRecordTypes set }
1934	<
1935	<	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
1936	<	begin
1937	<	result := True;
1938	<	if not (State = dsOldValue) then
1939	<	result :=
1940	<	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
1941	<	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
1942	<	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
1943	<	end;
1944	<
1945	<
1946	<	function TIBCustomDataSet.LocateNext(const KeyFields: string;
1947	<	const KeyValues: Variant; Options: TLocateOptions): Boolean;
1948	<	begin
1949	<	DisableControls;
1950	<	try
1951	<	result := InternalLocate(KeyFields, KeyValues, Options);
1952	<	finally
1953	<	EnableControls;
1954	<	end;
1955	<	end;
1956	<
1957	<	procedure TIBCustomDataSet.InternalPrepare;
1958	<	var
1959	<	SetCursor: Boolean;
1960	<	DidActivate: Boolean;
1961	<	begin
1962	<	if FInternalPrepared then
1963	<	Exit;
1964	<	DidActivate := False;
1965	<	if Assigned(Database) and not Database.SQLHourGlass then
1966	<	SetCursor := False
1967	<	else
1968	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
1969	<	if SetCursor then
1970	<	Screen.Cursor := crHourGlass;
1971	<	try
1972	<	ActivateConnection;
1973	<	DidActivate := ActivateTransaction;
1974	<	FBase.CheckDatabase;
1975	<	FBase.CheckTransaction;
1976	<	if HasParser and (FParser.SQLText <> FQSelect.SQL.Text) then
1977	<	FQSelect.SQL.Text := FParser.SQLText;
1978	<	//   writeln( FQSelect.SQL.Text);
1979	<	if FQSelect.SQL.Text <> '' then
1980	<	begin
1981	<	if not FQSelect.Prepared then
1982	<	begin
1983	<	FQSelect.GenerateParamNames := FGenerateParamNames;
1984	<	FQSelect.ParamCheck := ParamCheck;
1985	<	FQSelect.Prepare;
1986	<	end;
1987	<	FQDelete.GenerateParamNames := FGenerateParamNames;
1988	<	if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
1989	<	FQDelete.Prepare;
1990	<	FQInsert.GenerateParamNames := FGenerateParamNames;
1991	<	if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
1992	<	FQInsert.Prepare;
1993	<	FQRefresh.GenerateParamNames := FGenerateParamNames;
1994	<	if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
1995	<	FQRefresh.Prepare;
1996	<	FQModify.GenerateParamNames := FGenerateParamNames;
1997	<	if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
1998	<	FQModify.Prepare;
1999	<	FInternalPrepared := True;
2000	<	InternalInitFieldDefs;
2001	<	end else
2002	<	IBError(ibxeEmptyQuery, [nil]);
2003	<	finally
2004	<	if DidActivate then
2005	<	DeactivateTransaction;
2006	<	if SetCursor and (Screen.Cursor = crHourGlass) then
2007	<	Screen.Cursor := crDefault;
2008	<	end;
2009	<	end;
2010	<
2011	<	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
2012	<	begin
2013	<	SetModified(Value);
2014	<	end;
2015	<
2016	<	procedure TIBCustomDataSet.RevertRecord;
2017	<	var
2018	<	Buff: PRecordData;
2019	<	begin
2020	<	if FCachedUpdates and FUpdatesPending then
2021	<	begin
2022	<	Buff := PRecordData(GetActiveBuf);
2023	<	InternalRevertRecord(Buff^.rdRecordNumber);
2024	<	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
2025	<	DataEvent(deRecordChange, 0);
2026	<	end;
2027	<	end;
2028	<
2029	<	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
2030	<	var
2031	<	OldBuffer: Pointer;
2032	<	procedure CopyOldBuffer;
2033	<	begin
2034	<	CopyRecordBuffer(Buffer, OldBuffer);
2035	<	if BlobFieldCount > 0 then
2036	<	FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream),
2037	<	0);
2038	<	end;
2039	<
2040	<	begin
2041	<	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
2042	<	begin
2043	<	OldBuffer := AllocRecordBuffer;
2044	<	try
2045	<	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
2046	<	begin
2047	<	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
2048	<	FILE_END);
2049	<	CopyOldBuffer;
2050	<	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
2051	<	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
2052	<	FILE_BEGIN, Buffer);
2053	<	end
2054	<	else begin
2055	<	CopyOldBuffer;
2056	<	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2057	<	OldBuffer);
2058	<	end;
2059	<	finally
2060	<	FreeRecordBuffer(PChar(OldBuffer));
2061	<	end;
2062	<	end;
2063	<	end;
2064	<
2065	<	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
2066	<	begin
2067	<	if (Value <= 0) then
2068	<	FBufferChunks := BufferCacheSize
2069	<	else
2070	<	FBufferChunks := Value;
2071	<	end;
2072	<
2073	<	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
2074	<	begin
2075	<	if (FBase.Database <> Value) then
2076	<	begin
2077	<	CheckDatasetClosed;
2078	<	FBase.Database := Value;
2079	<	FQDelete.Database := Value;
2080	<	FQInsert.Database := Value;
2081	<	FQRefresh.Database := Value;
2082	<	FQSelect.Database := Value;
2083	<	FQModify.Database := Value;
2084	<	end;
2085	<	end;
2086	<
2087	<	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
2088	<	begin
2089	<	if FQDelete.SQL.Text <> Value.Text then
2090	<	begin
2091	<	Disconnect;
2092	<	FQDelete.SQL.Assign(Value);
2093	<	end;
2094	<	end;
2095	<
2096	<	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
2097	<	begin
2098	<	if FQInsert.SQL.Text <> Value.Text then
2099	<	begin
2100	<	Disconnect;
2101	<	FQInsert.SQL.Assign(Value);
2102	<	end;
2103	<	end;
2104	<
2105	<	procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
2106	<	var
2107	<	i, j: Integer;
2108	<	cr, data: PChar;
2109	<	fn, st: string;
2110	<	OldBuffer: Pointer;
2111	<	ts: TTimeStamp;
2112	<	begin
2113	<	if (Buffer = nil) then
2114	<	IBError(ibxeBufferNotSet, [nil]);
2115	<	if (not FInternalPrepared) then
2116	<	InternalPrepare;
2117	<	OldBuffer := nil;
2118	<	try
2119	<	for i := 0 to Qry.Params.Count - 1 do
2120	<	begin
2121	<	fn := Qry.Params[i].Name;
2122	<	if (Pos('OLD_', fn) = 1) then {mbcs ok}
2123	<	begin
2124	<	fn := Copy(fn, 5, Length(fn));
2125	<	if not Assigned(OldBuffer) then
2126	<	begin
2127	<	OldBuffer := AllocRecordBuffer;
2128	<	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
2129	<	end;
2130	<	cr := OldBuffer;
2131	<	end
2132	<	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
2133	<	begin
2134	<	fn := Copy(fn, 5, Length(fn));
2135	<	cr := Buffer;
2136	<	end
2137	<	else
2138	<	cr := Buffer;
2139	<	j := FQSelect.FieldIndex[fn] + 1;
2140	<	if (j > 0) then
2141	<	with PRecordData(cr)^ do
2142	<	begin
2143	<	if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize}
2144	<	begin
2145	<	PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey;
2146	<	continue;
2147	<	end;
2148	<	if rdFields[j].fdIsNull then
2149	<	Qry.Params[i].IsNull := True
2150	<	else begin
2151	<	Qry.Params[i].IsNull := False;
2152	<	data := cr + rdFields[j].fdDataOfs;
2153	<	case rdFields[j].fdDataType of
2154	<	SQL_TEXT, SQL_VARYING:
2155	<	begin
2156	<	SetString(st, data, rdFields[j].fdDataLength);
2157	<	Qry.Params[i].AsString := st;
2158	<	end;
2159	<	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
2160	<	Qry.Params[i].AsDouble := PDouble(data)^;
2161	<	SQL_SHORT, SQL_LONG:
2162	<	begin
2163	<	if rdFields[j].fdDataScale = 0 then
2164	<	Qry.Params[i].AsLong := PLong(data)^
2165	<	else if rdFields[j].fdDataScale >= (-4) then
2166	<	Qry.Params[i].AsCurrency := PCurrency(data)^
2167	<	else
2168	<	Qry.Params[i].AsDouble := PDouble(data)^;
2169	<	end;
2170	<	SQL_INT64:
2171	<	begin
2172	<	if rdFields[j].fdDataScale = 0 then
2173	<	Qry.Params[i].AsInt64 := PInt64(data)^
2174	<	else if rdFields[j].fdDataScale >= (-4) then
2175	<	Qry.Params[i].AsCurrency := PCurrency(data)^
2176	<	else
2177	<	Qry.Params[i].AsDouble := PDouble(data)^;
2178	<	end;
2179	<	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
2180	<	Qry.Params[i].AsQuad := PISC_QUAD(data)^;
2181	<	SQL_TYPE_DATE:
2182	<	begin
2183	<	ts.Date := PInt(data)^;
2184	<	ts.Time := 0;
2185	<	Qry.Params[i].AsDate :=
2186	<	TimeStampToDateTime(ts);
2187	<	end;
2188	<	SQL_TYPE_TIME:
2189	<	begin
2190	<	ts.Date := 0;
2191	<	ts.Time := PInt(data)^;
2192	<	Qry.Params[i].AsTime :=
2193	<	TimeStampToDateTime(ts);
2194	<	end;
2195	<	SQL_TIMESTAMP:
2196	<	Qry.Params[i].AsDateTime :=
2197	<	TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^)));
2198	<	SQL_BOOLEAN:
2199	<	Qry.Params[i].AsBoolean := PWordBool(data)^;
2200	<	end;
2201	<	end;
2202	<	end;
2203	<	end;
2204	<	finally
2205	<	if (OldBuffer <> nil) then
2206	<	FreeRecordBuffer(PChar(OldBuffer));
2207	<	end;
2208	<	end;
2209	<
2210	<	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2211	<	begin
2212	<	if FQRefresh.SQL.Text <> Value.Text then
2213	<	begin
2214	<	Disconnect;
2215	<	FQRefresh.SQL.Assign(Value);
2216	<	end;
2217	<	end;
2218	<
2219	<	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2220	<	begin
2221	<	if FQSelect.SQL.Text <> Value.Text then
2222	<	begin
2223	<	Disconnect;
2224	<	FQSelect.SQL.Assign(Value);
2225	<	FBaseSQLSelect.assign(Value);
2226	<	end;
2227	<	end;
2228	<
2229	<	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2230	<	begin
2231	<	if FQModify.SQL.Text <> Value.Text then
2232	<	begin
2233	<	Disconnect;
2234	<	FQModify.SQL.Assign(Value);
2235	<	end;
2236	<	end;
2237	<
2238	<	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2239	<	begin
2240	<	if (FBase.Transaction <> Value) then
2241	<	begin
2242	<	CheckDatasetClosed;
2243	<	FBase.Transaction := Value;
2244	<	FQDelete.Transaction := Value;
2245	<	FQInsert.Transaction := Value;
2246	<	FQRefresh.Transaction := Value;
2247	<	FQSelect.Transaction := Value;
2248	<	FQModify.Transaction := Value;
2249	<	end;
2250	<	end;
2251	<
2252	<	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2253	<	begin
2254	<	CheckDatasetClosed;
2255	<	FUniDirectional := Value;
2256	<	end;
2257	<
2258	<	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2259	<	begin
2260	<	FUpdateRecordTypes := Value;
2261	<	if Active then
2262	<	First;
2263	<	end;
2264	<
2265	<	procedure TIBCustomDataSet.RefreshParams;
2266	<	var
2267	<	DataSet: TDataSet;
2268	<	begin
2269	<	DisableControls;
2270	<	try
2271	<	if FDataLink.DataSource <> nil then
2272	<	begin
2273	<	DataSet := FDataLink.DataSource.DataSet;
2274	<	if DataSet <> nil then
2275	<	if DataSet.Active and (DataSet.State <> dsSetKey) then
2276	<	begin
2277	<	Close;
2278	<	Open;
2279	<	end;
2280	<	end;
2281	<	finally
2282	<	EnableControls;
2283	<	end;
2284	<	end;
2285	<
2286	<
2287	<	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2288	<	begin
2289	<	Active := false;
2290	<	{  if FOpen then
2291	<	InternalClose;}
2292	<	if FInternalPrepared then
2293	<	InternalUnPrepare;
2294	<	FieldDefs.Clear;
2295	<	FieldDefs.Updated := false;
2296	<	end;
2297	<
2298	<	{ I can "undelete" uninserted records (make them "inserted" again).
2299	<	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2300	<	procedure TIBCustomDataSet.Undelete;
2301	<	var
2302	<	Buff: PRecordData;
2303	<	begin
2304	<	CheckActive;
2305	<	Buff := PRecordData(GetActiveBuf);
2306	<	with Buff^ do
2307	<	begin
2308	<	if rdCachedUpdateStatus = cusUninserted then
2309	<	begin
2310	<	rdCachedUpdateStatus := cusInserted;
2311	<	Dec(FDeletedRecords);
2312	<	end
2313	<	else if (rdUpdateStatus = usDeleted) and
2314	<	(rdCachedUpdateStatus = cusDeleted) then
2315	<	begin
2316	<	rdCachedUpdateStatus := cusUnmodified;
2317	<	rdUpdateStatus := usUnmodified;
2318	<	Dec(FDeletedRecords);
2319	<	end;
2320	<	WriteRecordCache(rdRecordNumber, PChar(Buff));
2321	<	end;
2322	<	end;
2323	<
2324	<	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2325	<	begin
2326	<	if Active then
2327	<	if GetActiveBuf <> nil then
2328	<	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2329	<	else
2330	<	result := usUnmodified
2331	<	else
2332	<	result := usUnmodified;
2333	<	end;
2334	<
2335	<	function TIBCustomDataSet.IsSequenced: Boolean;
2336	<	begin
2337	<	Result := Assigned( FQSelect ) and FQSelect.EOF;
2338	<	end;
2339	<
2340	<	function TIBCustomDataSet.ParamByName(ParamName: String): TIBXSQLVAR;
2341	<	begin
2342	<	ActivateConnection;
2343	<	ActivateTransaction;
2344	<	if not FInternalPrepared then
2345	<	InternalPrepare;
2346	<	Result := Params.ByName(ParamName);
2347	<	end;
2348	<
2349	<	{Beware: the parameter FCache is used as an identifier to determine which
2350	<	cache is being operated on and is not referenced in the computation.
2351	<	The result is an adjusted offset into the identified cache, either the
2352	<	Buffer Cache or the old Buffer Cache.}
2353	<
2354	<	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
2355	<	Origin: Integer): DWORD;
2356	<	var
2357	<	OldCacheSize: Integer;
2358	<	begin
2359	<	if (FCache = FBufferCache) then
2360	<	begin
2361	<	case Origin of
2362	<	FILE_BEGIN:    FBPos := Offset;
2363	<	FILE_CURRENT:  FBPos := FBPos + Offset;
2364	<	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
2365	<	end;
2366	<	OldCacheSize := FCacheSize;
2367	<	while (FBPos >= DWORD(FCacheSize)) do
2368	<	Inc(FCacheSize, FBufferChunkSize);
2369	<	if FCacheSize > OldCacheSize then
2370	<	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
2371	<	result := FBPos;
2372	<	end
2373	<	else begin
2374	<	case Origin of
2375	<	FILE_BEGIN:    FOBPos := Offset;
2376	<	FILE_CURRENT:  FOBPos := FOBPos + Offset;
2377	<	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
2378	<	end;
2379	<	OldCacheSize := FOldCacheSize;
2380	<	while (FBPos >= DWORD(FOldCacheSize)) do
2381	<	Inc(FOldCacheSize, FBufferChunkSize);
2382	<	if FOldCacheSize > OldCacheSize then
2383	<	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
2384	<	result := FOBPos;
2385	<	end;
2386	<	end;
2387	<
2388	<	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2389	<	Buffer: PChar);
2390	<	var
2391	<	pCache: PChar;
2392	<	AdjustedOffset: DWORD;
2393	<	bOld: Boolean;
2394	<	begin
2395	<	bOld := (FCache = FOldBufferCache);
2396	<	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2397	<	if not bOld then
2398	<	pCache := FBufferCache + AdjustedOffset
2399	<	else
2400	<	pCache := FOldBufferCache + AdjustedOffset;
2401	<	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
2402	<	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2403	<	end;
2404	<
2405	<	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
2406	<	ReadOldBuffer: Boolean);
2407	<	begin
2408	<	if FUniDirectional then
2409	<	RecordNumber := RecordNumber mod UniCache;
2410	<	if (ReadOldBuffer) then
2411	<	begin
2412	<	ReadRecordCache(RecordNumber, Buffer, False);
2413	<	if FCachedUpdates and
2414	<	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
2415	<	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2416	<	Buffer)
2417	<	else
2418	<	if ReadOldBuffer and
2419	<	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
2420	<	CopyRecordBuffer( FOldBuffer, Buffer )
2421	<	end
2422	<	else
2423	<	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2424	<	end;
2425	<
2426	<	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2427	<	Buffer: PChar);
2428	<	var
2429	<	pCache: PChar;
2430	<	AdjustedOffset: DWORD;
2431	<	bOld: Boolean;
2432	<	dwEnd: DWORD;
2433	<	begin
2434	<	bOld := (FCache = FOldBufferCache);
2435	<	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2436	<	if not bOld then
2437	<	pCache := FBufferCache + AdjustedOffset
2438	<	else
2439	<	pCache := FOldBufferCache + AdjustedOffset;
2440	<	Move(Buffer^, pCache^, FRecordBufferSize);
2441	<	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2442	<	if not bOld then
2443	<	begin
2444	<	if (dwEnd > FBEnd) then
2445	<	FBEnd := dwEnd;
2446	<	end
2447	<	else begin
2448	<	if (dwEnd > FOBEnd) then
2449	<	FOBEnd := dwEnd;
2450	<	end;
2451	<	end;
2452	<
2453	<	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
2454	<	begin
2455	<	if RecordNumber >= 0 then
2456	<	begin
2457	<	if FUniDirectional then
2458	<	RecordNumber := RecordNumber mod UniCache;
2459	<	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2460	<	end;
2461	<	end;
2462	<
2463	<	function TIBCustomDataSet.AllocRecordBuffer: PChar;
2464	<	begin
2465	<	result := nil;
2466	<	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
2467	<	Move(FModelBuffer^, result^, FRecordBufferSize);
2468	<	end;
2469	<
2470	<	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
2471	<	var
2472	<	pb: PBlobDataArray;
2473	<	fs: TIBBlobStream;
2474	<	Buff: PChar;
2475	<	bTr, bDB: Boolean;
2476	<	begin
2477	<	Buff := GetActiveBuf;
2478	<	if Buff = nil then
2479	<	begin
2480	<	fs := TIBBlobStream.Create;
2481	<	fs.Mode := bmReadWrite;
2482	<	FBlobStreamList.Add(Pointer(fs));
2483	<	result := TIBDSBlobStream.Create(Field, fs, Mode);
2484	<	exit;
2485	<	end;
2486	<	pb := PBlobDataArray(Buff + FBlobCacheOffset);
2487	<	if pb^[Field.Offset] = nil then
2488	<	begin
2489	<	AdjustRecordOnInsert(Buff);
2490	<	pb^[Field.Offset] := TIBBlobStream.Create;
2491	<	fs := pb^[Field.Offset];
2492	<	FBlobStreamList.Add(Pointer(fs));
2493	<	fs.Mode := bmReadWrite;
2494	<	fs.Database := Database;
2495	<	fs.Transaction := Transaction;
2496	<	fs.BlobID :=
2497	<	PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
2498	<	if (CachedUpdates) then
2499	<	begin
2500	<	bTr := not Transaction.InTransaction;
2501	<	bDB := not Database.Connected;
2502	<	if bDB then
2503	<	Database.Open;
2504	<	if bTr then
2505	<	Transaction.StartTransaction;
2506	<	fs.Seek(0, soFromBeginning);
2507	<	if bTr then
2508	<	Transaction.Commit;
2509	<	if bDB then
2510	<	Database.Close;
2511	<	end;
2512	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
2513	<	end else
2514	<	fs := pb^[Field.Offset];
2515	<	result := TIBDSBlobStream.Create(Field, fs, Mode);
2516	<	end;
2517	<
2518	<	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
2519	<	const
2520	<	CMPLess = -1;
2521	<	CMPEql  =  0;
2522	<	CMPGtr  =  1;
2523	<	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
2524	<	(CMPGtr, CMPEql));
2525	<	begin
2526	<	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
2527	<
2528	<	if Result = 2 then
2529	<	begin
2530	<	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
2531	<	Result := CMPLess
2532	<	else
2533	<	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
2534	<	Result := CMPGtr
2535	<	else
2536	<	Result := CMPEql;
2537	<	end;
2538	<	end;
2539	<
2540	<	procedure TIBCustomDataSet.DoBeforeDelete;
2541	<	var
2542	<	Buff: PRecordData;
2543	<	begin
2544	<	if not CanDelete then
2545	<	IBError(ibxeCannotDelete, [nil]);
2546	<	Buff := PRecordData(GetActiveBuf);
2547	<	if FCachedUpdates and
2548	<	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
2549	<	SaveOldBuffer(PChar(Buff));
2550	<	inherited DoBeforeDelete;
2551	<	end;
2552	<
2553	<	procedure TIBCustomDataSet.DoAfterDelete;
2554	<	begin
2555	<	inherited DoAfterDelete;
2556	<	InternalAutoCommit;
2557	<	end;
2558	<
2559	<	procedure TIBCustomDataSet.DoBeforeEdit;
2560	<	var
2561	<	Buff: PRecordData;
2562	<	begin
2563	<	Buff := PRecordData(GetActiveBuf);
2564	<	if not(CanEdit or (FQModify.SQL.Count <> 0) or
2565	<	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
2566	<	IBError(ibxeCannotUpdate, [nil]);
2567	<	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
2568	<	SaveOldBuffer(PChar(Buff));
2569	<	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
2570	<	inherited DoBeforeEdit;
2571	<	end;
2572	<
2573	<	procedure TIBCustomDataSet.DoBeforeInsert;
2574	<	begin
2575	<	if not CanInsert then
2576	<	IBError(ibxeCannotInsert, [nil]);
2577	<	inherited DoBeforeInsert;
2578	<	end;
2579	<
2580	<	procedure TIBCustomDataSet.DoAfterInsert;
2581	<	begin
2582	<	if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
2583	<	GeneratorField.Apply;
2584	<	inherited DoAfterInsert;
2585	<	end;
2586	<
2587	<	procedure TIBCustomDataSet.DoBeforeOpen;
2588	<	begin
2589	<	if assigned(FParser) then
2590	<	FParser.Reset;
2591	<	DataEvent(deCheckBrowseMode,1); {Conventional use to report getting ready to prepare}
2592	<	inherited DoBeforeOpen;
2593	<	DataEvent(deCheckBrowseMode,2); {Conventional use to report the right time to set parameters}
2594	<	end;
2595	<
2596	<	procedure TIBCustomDataSet.DoBeforePost;
2597	<	begin
2598	<	inherited DoBeforePost;
2599	<	if (State = dsInsert) and
2600	<	(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
2601	<	GeneratorField.Apply
2602	<	end;
2603	<
2604	<	procedure TIBCustomDataSet.DoAfterPost;
2605	<	begin
2606	<	inherited DoAfterPost;
2607	<	InternalAutoCommit;
2608	<	end;
2609	<
2610	<	procedure TIBCustomDataSet.FetchAll;
2611	<	var
2612	<	SetCursor: Boolean;
2613	<	{$IF FPC_FULLVERSION >= 20700 }
2614	<	CurBookmark: TBookmark;
2615	<	{$ELSE}
2616	<	CurBookmark: string;
2617	<	{$ENDIF}
2618	<	begin
2619	<	if Assigned(Database) and not Database.SQLHourGlass then
2620	<	SetCursor := False
2621	<	else
2622	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2623	<	if SetCursor then
2624	<	Screen.Cursor := crHourGlass;
2625	<	try
2626	<	if FQSelect.EOF or not FQSelect.Open then
2627	<	exit;
2628	<	DisableControls;
2629	<	try
2630	<	CurBookmark := Bookmark;
2631	<	Last;
2632	<	Bookmark := CurBookmark;
2633	<	finally
2634	<	EnableControls;
2635	<	end;
2636	<	finally
2637	<	if SetCursor and (Screen.Cursor = crHourGlass) then
2638	<	Screen.Cursor := crDefault;
2639	<	end;
2640	<	end;
2641	<
2642	<	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
2643	<	begin
2644	<	FreeMem(Buffer);
2645	<	Buffer := nil;
2646	<	end;
2647	<
2648	<	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
2649	<	begin
2650	<	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
2651	<	end;
2652	<
2653	<	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
2654	<	begin
2655	<	result := PRecordData(Buffer)^.rdBookmarkFlag;
2656	<	end;
2657	<
2658	<	function TIBCustomDataSet.GetCanModify: Boolean;
2659	<	begin
2660	<	result := (FQInsert.SQL.Text <> '') or
2661	<	(FQModify.SQL.Text <> '') or
2662	<	(FQDelete.SQL.Text <> '') or
2663	<	(Assigned(FUpdateObject));
2664	<	end;
2665	<
2666	<	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
2667	<	begin
2668	<	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
2669	<	begin
2670	<	UpdateCursorPos;
2671	<	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
2672	<	result := True;
2673	<	end
2674	<	else
2675	<	result := False;
2676	<	end;
2677	<
2678	<	function TIBCustomDataSet.GetDataSource: TDataSource;
2679	<	begin
2680	<	if FDataLink = nil then
2681	<	result := nil
2682	<	else
2683	<	result := FDataLink.DataSource;
2684	<	end;
2685	<
2686	<	function TIBCustomDataSet.GetDBAliasName(FieldNo: integer): string;
2687	<	begin
2688	<	Result := FAliasNameMap[FieldNo-1]
2689	<	end;
2690	<
2691	<	function TIBCustomDataSet.GetFieldDefFromAlias(aliasName: string): TFieldDef;
2692	<	var
2693	<	i: integer;
2694	<	begin
2695	<	Result := nil;
2696	<	for i := 0 to Length(FAliasNameMap) - 1 do
2697	<	if FAliasNameMap[i] = aliasName then
2698	<	begin
2699	<	Result := FieldDefs[i+1];
2700	<	Exit
2701	<	end;
2702	<	end;
2703	<
2704	<	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
2705	<	begin
2706	<	Result := DefaultFieldClasses[FieldType];
2707	<	end;
2708	<
2709	<	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
2710	<	begin
2711	<	result := GetFieldData(FieldByNumber(FieldNo), buffer);
2712	<	end;
2713	<
2714	<	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
2715	<	var
2716	<	Buff, Data: PChar;
2717	<	CurrentRecord: PRecordData;
2718	<	begin
2719	<	result := False;
2720	<	Buff := GetActiveBuf;
2721	<	if (Buff = nil) or
2722	<	(not IsVisible(Buff)) or not assigned(Field.DataSet) then
2723	<	exit;
2724	<	{ The intention here is to stuff the buffer with the data for the
2725	<	referenced field for the current record }
2726	<	CurrentRecord := PRecordData(Buff);
2727	<	if (Field.FieldNo < 0) then
2728	<	begin
2729	<	Inc(Buff, FRecordSize + Field.Offset);
2730	<	result := Boolean(Buff[0]);
2731	<	if result and (Buffer <> nil) then
2732	<	Move(Buff[1], Buffer^, Field.DataSize);
2733	<	end
2734	<	else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
2735	<	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
2736	<	begin
2737	<	result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull;
2738	<	if result and (Buffer <> nil) then
2739	<	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do
2740	<	begin
2741	<	Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs;
2742	<	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
2743	<	begin
2744	<	if fdDataLength <= Field.Size then
2745	<	begin
2746	<	Move(Data^, Buffer^, fdDataLength);
2747	<	PChar(Buffer)[fdDataLength] := #0;
2748	<	end
2749	<	else
2750	<	IBError(ibxeFieldSizeError,[Field.FieldName])
2751	<	end
2752	<	else
2753	<	Move(Data^, Buffer^, Field.DataSize);
2754	<	end;
2755	<	end;
2756	<	end;
2757	<
2758	<	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
2759	<	opposed to 0-based indexes.
2760	<	This is because we want LastRecordNumber/RecordCount = 1 }
2761	<
2762	<	function TIBCustomDataSet.GetRecNo: Integer;
2763	<	begin
2764	<	if GetActiveBuf = nil then
2765	<	result := 0
2766	<	else
2767	<	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
2768	<	end;
2769	<
2770	<	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
2771	<	DoCheck: Boolean): TGetResult;
2772	<	var
2773	<	Accept: Boolean;
2774	<	SaveState: TDataSetState;
2775	<	begin
2776	<	Result := grOK;
2777	<	if Filtered and Assigned(OnFilterRecord) then
2778	<	begin
2779	<	Accept := False;
2780	<	SaveState := SetTempState(dsFilter);
2781	<	while not Accept do
2782	<	begin
2783	<	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2784	<	if Result <> grOK then
2785	<	break;
2786	<	FFilterBuffer := Buffer;
2787	<	try
2788	<	Accept := True;
2789	<	OnFilterRecord(Self, Accept);
2790	<	if not Accept and (GetMode = gmCurrent) then
2791	<	GetMode := gmPrior;
2792	<	except
2793	<	//        Application.HandleException(Self);
2794	<	end;
2795	<	end;
2796	<	RestoreState(SaveState);
2797	<	end
2798	<	else
2799	<	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
2800	<	end;
2801	<
2802	<	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
2803	<	DoCheck: Boolean): TGetResult;
2804	<	begin
2805	<	result := grError;
2806	<	case GetMode of
2807	<	gmCurrent: begin
2808	<	if (FCurrentRecord >= 0) then begin
2809	<	if FCurrentRecord < FRecordCount then
2810	<	ReadRecordCache(FCurrentRecord, Buffer, False)
2811	<	else begin
2812	<	while (not FQSelect.EOF) and
2813	<	(FQSelect.Next <> nil) and
2814	<	(FCurrentRecord >= FRecordCount) do begin
2815	<	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
2816	<	Inc(FRecordCount);
2817	<	end;
2818	<	FCurrentRecord := FRecordCount - 1;
2819	<	if (FCurrentRecord >= 0) then
2820	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2821	<	end;
2822	<	result := grOk;
2823	<	end else
2824	<	result := grBOF;
2825	<	end;
2826	<	gmNext: begin
2827	<	result := grOk;
2828	<	if FCurrentRecord = FRecordCount then
2829	<	result := grEOF
2830	<	else if FCurrentRecord = FRecordCount - 1 then begin
2831	<	if (not FQSelect.EOF) then begin
2832	<	FQSelect.Next;
2833	<	Inc(FCurrentRecord);
2834	<	end;
2835	<	if (FQSelect.EOF) then begin
2836	<	result := grEOF;
2837	<	end else begin
2838	<	Inc(FRecordCount);
2839	<	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
2840	<	end;
2841	<	end else if (FCurrentRecord < FRecordCount) then begin
2842	<	Inc(FCurrentRecord);
2843	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2844	<	end;
2845	<	end;
2846	<	else { gmPrior }
2847	<	begin
2848	<	if (FCurrentRecord = 0) then begin
2849	<	Dec(FCurrentRecord);
2850	<	result := grBOF;
2851	<	end else if (FCurrentRecord > 0) and
2852	<	(FCurrentRecord <= FRecordCount) then begin
2853	<	Dec(FCurrentRecord);
2854	<	ReadRecordCache(FCurrentRecord, Buffer, False);
2855	<	result := grOk;
2856	<	end else if (FCurrentRecord = -1) then
2857	<	result := grBOF;
2858	<	end;
2859	<	end;
2860	<	if result = grOk then
2861	<	result := AdjustCurrentRecord(Buffer, GetMode);
2862	<	if result = grOk then with PRecordData(Buffer)^ do begin
2863	<	rdBookmarkFlag := bfCurrent;
2864	<	GetCalcFields(Buffer);
2865	<	end else if (result = grEOF) then begin
2866	<	CopyRecordBuffer(FModelBuffer, Buffer);
2867	<	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2868	<	end else if (result = grBOF) then begin
2869	<	CopyRecordBuffer(FModelBuffer, Buffer);
2870	<	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
2871	<	end else if (result = grError) then begin
2872	<	CopyRecordBuffer(FModelBuffer, Buffer);
2873	<	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
2874	<	end;;
2875	<	end;
2876	<
2877	<	function TIBCustomDataSet.GetRecordCount: Integer;
2878	<	begin
2879	<	result := FRecordCount - FDeletedRecords;
2880	<	end;
2881	<
2882	<	function TIBCustomDataSet.GetRecordSize: Word;
2883	<	begin
2884	<	result := FRecordBufferSize;
2885	<	end;
2886	<
2887	<	procedure TIBCustomDataSet.InternalAutoCommit;
2888	<	begin
2889	<	with Transaction do
2890	<	if InTransaction and (FAutoCommit = acCommitRetaining) then
2891	<	begin
2892	<	if CachedUpdates then ApplyUpdates;
2893	<	CommitRetaining;
2894	<	end;
2895	<	end;
2896	<
2897	<	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
2898	<	begin
2899	<	CheckEditState;
2900	<	begin
2901	<	{ When adding records, we *always* append.
2902	<	Insertion is just too costly }
2903	<	AdjustRecordOnInsert(Buffer);
2904	<	with PRecordData(Buffer)^ do
2905	<	begin
2906	<	rdUpdateStatus := usInserted;
2907	<	rdCachedUpdateStatus := cusInserted;
2908	<	end;
2909	<	if not CachedUpdates then
2910	<	InternalPostRecord(FQInsert, Buffer)
2911	<	else begin
2912	<	WriteRecordCache(FCurrentRecord, Buffer);
2913	<	FUpdatesPending := True;
2914	<	end;
2915	<	Inc(FRecordCount);
2916	<	InternalSetToRecord(Buffer);
2917	<	end
2918	<	end;
2919	<
2920	<	procedure TIBCustomDataSet.InternalCancel;
2921	<	var
2922	<	Buff: PChar;
2923	<	CurRec: Integer;
2924	<	begin
2925	<	inherited InternalCancel;
2926	<	Buff := GetActiveBuf;
2927	<	if Buff <> nil then begin
2928	<	CurRec := FCurrentRecord;
2929	<	AdjustRecordOnInsert(Buff);
2930	<	if (State = dsEdit) then begin
2931	<	CopyRecordBuffer(FOldBuffer, Buff);
2932	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2933	<	end else begin
2934	<	CopyRecordBuffer(FModelBuffer, Buff);
2935	<	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
2936	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2937	<	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
2938	<	FCurrentRecord := CurRec;
2939	<	end;
2940	<	end;
2941	<	end;
2942	<
2943	<
2944	<	procedure TIBCustomDataSet.InternalClose;
2945	<	begin
2946	<	if FDidActivate then
2947	<	DeactivateTransaction;
2948	<	FQSelect.Close;
2949	<	ClearBlobCache;
2950	<	FreeRecordBuffer(FModelBuffer);
2951	<	FreeRecordBuffer(FOldBuffer);
2952	<	FCurrentRecord := -1;
2953	<	FOpen := False;
2954	<	FRecordCount := 0;
2955	<	FDeletedRecords := 0;
2956	<	FRecordSize := 0;
2957	<	FBPos := 0;
2958	<	FOBPos := 0;
2959	<	FCacheSize := 0;
2960	<	FOldCacheSize := 0;
2961	<	FBEnd := 0;
2962	<	FOBEnd := 0;
2963	<	FreeMem(FBufferCache);
2964	<	FBufferCache := nil;
2965	<	FreeMem(FOldBufferCache);
2966	<	FOldBufferCache := nil;
2967	<	BindFields(False);
2968	<	if DefaultFields then DestroyFields;
2969	<	end;
2970	<
2971	<	procedure TIBCustomDataSet.InternalDelete;
2972	<	var
2973	<	Buff: PChar;
2974	<	SetCursor: Boolean;
2975	<	begin
2976	<	if Assigned(Database) and not Database.SQLHourGlass then
2977	<	SetCursor := False
2978	<	else
2979	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
2980	<	if SetCursor then
2981	<	Screen.Cursor := crHourGlass;
2982	<	try
2983	<	Buff := GetActiveBuf;
2984	<	if CanDelete then
2985	<	begin
2986	<	if not CachedUpdates then
2987	<	InternalDeleteRecord(FQDelete, Buff)
2988	<	else
2989	<	begin
2990	<	with PRecordData(Buff)^ do
2991	<	begin
2992	<	if rdCachedUpdateStatus = cusInserted then
2993	<	rdCachedUpdateStatus := cusUninserted
2994	<	else begin
2995	<	rdUpdateStatus := usDeleted;
2996	<	rdCachedUpdateStatus := cusDeleted;
2997	<	end;
2998	<	end;
2999	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3000	<	end;
3001	<	Inc(FDeletedRecords);
3002	<	FUpdatesPending := True;
3003	<	end else
3004	<	IBError(ibxeCannotDelete, [nil]);
3005	<	finally
3006	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3007	<	Screen.Cursor := crDefault;
3008	<	end;
3009	<	end;
3010	<
3011	<	procedure TIBCustomDataSet.InternalFirst;
3012	<	begin
3013	<	FCurrentRecord := -1;
3014	<	end;
3015	<
3016	<	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
3017	<	begin
3018	<	FCurrentRecord := PInteger(Bookmark)^;
3019	<	end;
3020	<
3021	<	procedure TIBCustomDataSet.InternalHandleException;
3022	<	begin
3023	<	Application.HandleException(Self)
3024	<	end;
3025	<
3026	<	procedure TIBCustomDataSet.InternalInitFieldDefs;
3027	<	begin
3028	<	if not InternalPrepared then
3029	<	begin
3030	<	InternalPrepare;
3031	<	exit;
3032	<	end;
3033	<	FieldDefsFromQuery(FQSelect);
3034	<	end;
3035	<
3036	<	procedure TIBCustomDataSet.FieldDefsFromQuery(SourceQuery: TIBSQL);
3037	<	const
3038	<	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
3039	<	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
3040	<	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
3041	<	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
3042	<	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
3043	<	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
3044	<	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
3045	<	var
3046	<	FieldType: TFieldType;
3047	<	FieldSize: Word;
3048	<	FieldNullable : Boolean;
3049	<	i, FieldPosition, FieldPrecision: Integer;
3050	<	FieldAliasName, DBAliasName: string;
3051	<	RelationName, FieldName: string;
3052	<	Query : TIBSQL;
3053	<	FieldIndex: Integer;
3054	<	FRelationNodes : TRelationNode;
3055	<
3056	<	function Add_Node(Relation, Field : String) : TRelationNode;
3057	<	var
3058	<	FField : TFieldNode;
3059	<	begin
3060	<	if FRelationNodes.RelationName = '' then
3061	<	Result := FRelationNodes
3062	<	else
3063	<	begin
3064	<	Result := TRelationNode.Create;
3065	<	Result.NextRelation := FRelationNodes;
3066	<	end;
3067	<	Result.RelationName := Relation;
3068	<	FRelationNodes := Result;
3069	<	Query.Params[0].AsString := Relation;
3070	<	Query.ExecQuery;
3071	<	while not Query.Eof do
3072	<	begin
3073	<	FField := TFieldNode.Create;
3074	<	FField.FieldName := Query.Fields[2].AsString;
3075	<	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
3076	<	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
3077	<	FField.NextField := Result.FieldNodes;
3078	<	Result.FieldNodes := FField;
3079	<	Query.Next;
3080	<	end;
3081	<	Query.Close;
3082	<	end;
3083	<
3084	<	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
3085	<	var
3086	<	FRelation : TRelationNode;
3087	<	FField : TFieldNode;
3088	<	begin
3089	<	FRelation := FRelationNodes;
3090	<	while Assigned(FRelation) and
3091	<	(FRelation.RelationName <> Relation) do
3092	<	FRelation := FRelation.NextRelation;
3093	<	if not Assigned(FRelation) then
3094	<	FRelation := Add_Node(Relation, Field);
3095	<	Result := false;
3096	<	FField := FRelation.FieldNodes;
3097	<	while Assigned(FField) do
3098	<	if FField.FieldName = Field then
3099	<	begin
3100	<	Result := Ffield.COMPUTED_BLR;
3101	<	Exit;
3102	<	end
3103	<	else
3104	<	FField := Ffield.NextField;
3105	<	end;
3106	<
3107	<	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
3108	<	var
3109	<	FRelation : TRelationNode;
3110	<	FField : TFieldNode;
3111	<	begin
3112	<	FRelation := FRelationNodes;
3113	<	while Assigned(FRelation) and
3114	<	(FRelation.RelationName <> Relation) do
3115	<	FRelation := FRelation.NextRelation;
3116	<	if not Assigned(FRelation) then
3117	<	FRelation := Add_Node(Relation, Field);
3118	<	Result := false;
3119	<	FField := FRelation.FieldNodes;
3120	<	while Assigned(FField) do
3121	<	if FField.FieldName = Field then
3122	<	begin
3123	<	Result := Ffield.DEFAULT_VALUE;
3124	<	Exit;
3125	<	end
3126	<	else
3127	<	FField := Ffield.NextField;
3128	<	end;
3129	<
3130	<	Procedure FreeNodes;
3131	<	var
3132	<	FRelation : TRelationNode;
3133	<	FField : TFieldNode;
3134	<	begin
3135	<	while Assigned(FRelationNodes) do
3136	<	begin
3137	<	While Assigned(FRelationNodes.FieldNodes) do
3138	<	begin
3139	<	FField := FRelationNodes.FieldNodes.NextField;
3140	<	FRelationNodes.FieldNodes.Free;
3141	<	FRelationNodes.FieldNodes := FField;
3142	<	end;
3143	<	FRelation := FRelationNodes.NextRelation;
3144	<	FRelationNodes.Free;
3145	<	FRelationNodes := FRelation;
3146	<	end;
3147	<	end;
3148	<
3149	<	begin
3150	<	FRelationNodes := TRelationNode.Create;
3151	<	FNeedsRefresh := False;
3152	<	Database.InternalTransaction.StartTransaction;
3153	<	Query := TIBSQL.Create(self);
3154	<	try
3155	<	Query.Database := DataBase;
3156	<	Query.Transaction := Database.InternalTransaction;
3157	<	FieldDefs.BeginUpdate;
3158	<	FieldDefs.Clear;
3159	<	FieldIndex := 0;
3160	<	if (Length(FMappedFieldPosition) < SourceQuery.Current.Count) then
3161	<	SetLength(FMappedFieldPosition, SourceQuery.Current.Count);
3162	<	Query.SQL.Text := DefaultSQL;
3163	<	Query.Prepare;
3164	<	SetLength(FAliasNameMap, SourceQuery.Current.Count);
3165	<	SetLength(FAliasNameList, SourceQuery.Current.Count);
3166	<	for i := 0 to SourceQuery.Current.Count - 1 do
3167	<	with SourceQuery.Current[i].Data^ do
3168	<	begin
3169	<	{ Get the field name }
3170	<	FieldAliasName := SourceQuery.Current[i].Name;
3171	<	SetString(DBAliasName, aliasname, aliasname_length);
3172	<	SetString(RelationName, relname, relname_length);
3173	<	SetString(FieldName, sqlname, sqlname_length);
3174	<	FAliasNameList[i] := DBAliasName;
3175	<	FieldSize := 0;
3176	<	FieldPrecision := 0;
3177	<	FieldNullable := SourceQuery.Current[i].IsNullable;
3178	<	case sqltype and not 1 of
3179	<	{ All VARCHAR's must be converted to strings before recording
3180	<	their values }
3181	<	SQL_VARYING, SQL_TEXT:
3182	<	begin
3183	<	FieldSize := sqllen;
3184	<	FieldType := ftString;
3185	<	end;
3186	<	{ All Doubles/Floats should be cast to doubles }
3187	<	SQL_DOUBLE, SQL_FLOAT:
3188	<	FieldType := ftFloat;
3189	<	SQL_SHORT:
3190	<	begin
3191	<	if (sqlscale = 0) then
3192	<	FieldType := ftSmallInt
3193	<	else begin
3194	<	FieldType := ftBCD;
3195	<	FieldPrecision := 4;
3196	<	FieldSize := -sqlscale;
3197	<	end;
3198	<	end;
3199	<	SQL_LONG:
3200	<	begin
3201	<	if (sqlscale = 0) then
3202	<	FieldType := ftInteger
3203	<	else if (sqlscale >= (-4)) then
3204	<	begin
3205	<	FieldType := ftBCD;
3206	<	FieldPrecision := 9;
3207	<	FieldSize := -sqlscale;
3208	<	end
3209	<	else
3210	<	if Database.SQLDialect = 1 then
3211	<	FieldType := ftFloat
3212	<	else
3213	<	if (FieldCount > i) and (Fields[i] is TFloatField) then
3214	<	FieldType := ftFloat
3215	<	else
3216	<	begin
3217	<	FieldType := ftFMTBCD;
3218	<	FieldPrecision := 9;
3219	<	FieldSize := -sqlscale;
3220	<	end;
3221	<	end;
3222	<
3223	<	SQL_INT64:
3224	<	begin
3225	<	if (sqlscale = 0) then
3226	<	FieldType := ftLargeInt
3227	<	else if (sqlscale >= (-4)) then
3228	<	begin
3229	<	FieldType := ftBCD;
3230	<	FieldPrecision := 18;
3231	<	FieldSize := -sqlscale;
3232	<	end
3233	<	else
3234	<	FieldType := ftFloat
3235	<	end;
3236	<	SQL_TIMESTAMP: FieldType := ftDateTime;
3237	<	SQL_TYPE_TIME: FieldType := ftTime;
3238	<	SQL_TYPE_DATE: FieldType := ftDate;
3239	<	SQL_BLOB:
3240	<	begin
3241	<	FieldSize := sizeof (TISC_QUAD);
3242	<	if (sqlsubtype = 1) then
3243	<	FieldType := ftmemo
3244	<	else
3245	<	FieldType := ftBlob;
3246	<	end;
3247	<	SQL_ARRAY:
3248	<	begin
3249	<	FieldSize := sizeof (TISC_QUAD);
3250	<	FieldType := ftUnknown;
3251	<	end;
3252	<	SQL_BOOLEAN:
3253	<	FieldType:= ftBoolean;
3254	<	else
3255	<	FieldType := ftUnknown;
3256	<	end;
3257	<	FieldPosition := i + 1;
3258	<	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
3259	<	begin
3260	<	FMappedFieldPosition[FieldIndex] := FieldPosition;
3261	<	Inc(FieldIndex);
3262	<	with FieldDefs.AddFieldDef do
3263	<	begin
3264	<	Name := FieldAliasName;
3265	<	FAliasNameMap[FieldNo-1] := DBAliasName;
3266	<	DataType := FieldType;
3267	<	Size := FieldSize;
3268	<	Precision := FieldPrecision;
3269	<	Required := not FieldNullable;
3270	<	InternalCalcField := False;
3271	<	if (FieldName <> '') and (RelationName <> '') then
3272	<	begin
3273	<	if Has_COMPUTED_BLR(RelationName, FieldName) then
3274	<	begin
3275	<	Attributes := [faReadOnly];
3276	<	InternalCalcField := True;
3277	<	FNeedsRefresh := True;
3278	<	end
3279	<	else
3280	<	begin
3281	<	if Has_DEFAULT_VALUE(RelationName, FieldName) then
3282	<	begin
3283	<	if not FieldNullable then
3284	<	Attributes := [faRequired];
3285	<	end
3286	<	else
3287	<	FNeedsRefresh := True;
3288	<	end;
3289	<	end;
3290	<	end;
3291	<	end;
3292	<	end;
3293	<	finally
3294	<	Query.free;
3295	<	FreeNodes;
3296	<	Database.InternalTransaction.Commit;
3297	<	FieldDefs.EndUpdate;
3298	<	end;
3299	<	end;
3300	<
3301	<	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
3302	<	begin
3303	<	CopyRecordBuffer(FModelBuffer, Buffer);
3304	<	end;
3305	<
3306	<	procedure TIBCustomDataSet.InternalLast;
3307	<	var
3308	<	Buffer: PChar;
3309	<	begin
3310	<	if (FQSelect.EOF) then
3311	<	FCurrentRecord := FRecordCount
3312	<	else begin
3313	<	Buffer := AllocRecordBuffer;
3314	<	try
3315	<	while FQSelect.Next <> nil do
3316	<	begin
3317	<	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3318	<	Inc(FRecordCount);
3319	<	end;
3320	<	FCurrentRecord := FRecordCount;
3321	<	finally
3322	<	FreeRecordBuffer(Buffer);
3323	<	end;
3324	<	end;
3325	<	end;
3326	<
3327	<	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
3328	<	var
3329	<	i: Integer;
3330	<	cur_param: TIBXSQLVAR;
3331	<	cur_field: TField;
3332	<	s: TStream;
3333	<	begin
3334	<	if FQSelect.SQL.Text = '' then
3335	<	IBError(ibxeEmptyQuery, [nil]);
3336	<	if not FInternalPrepared then
3337	<	InternalPrepare;
3338	<	if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
3339	<	begin
3340	<	for i := 0 to SQLParams.Count - 1 do
3341	<	begin
3342	<	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
3343	<	cur_param := SQLParams[i];
3344	<	if (cur_field <> nil) then begin
3345	<	if (cur_field.IsNull) then
3346	<	cur_param.IsNull := True
3347	<	else case cur_field.DataType of
3348	<	ftString:
3349	<	cur_param.AsString := cur_field.AsString;
3350	<	ftBoolean:
3351	<	cur_param.AsBoolean := cur_field.AsBoolean;
3352	<	ftSmallint, ftWord:
3353	<	cur_param.AsShort := cur_field.AsInteger;
3354	<	ftInteger:
3355	<	cur_param.AsLong := cur_field.AsInteger;
3356	<	ftLargeInt:
3357	<	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
3358	<	ftFloat, ftCurrency:
3359	<	cur_param.AsDouble := cur_field.AsFloat;
3360	<	ftBCD:
3361	<	cur_param.AsCurrency := cur_field.AsCurrency;
3362	<	ftDate:
3363	<	cur_param.AsDate := cur_field.AsDateTime;
3364	<	ftTime:
3365	<	cur_param.AsTime := cur_field.AsDateTime;
3366	<	ftDateTime:
3367	<	cur_param.AsDateTime := cur_field.AsDateTime;
3368	<	ftBlob, ftMemo:
3369	<	begin
3370	<	s := nil;
3371	<	try
3372	<	s := DataSource.DataSet.
3373	<	CreateBlobStream(cur_field, bmRead);
3374	<	cur_param.LoadFromStream(s);
3375	<	finally
3376	<	s.free;
3377	<	end;
3378	<	end;
3379	<	else
3380	<	IBError(ibxeNotSupported, [nil]);
3381	<	end;
3382	<	end;
3383	<	end;
3384	<	end;
3385	<	end;
3386	<
3387	<	procedure TIBCustomDataSet.ReQuery;
3388	<	begin
3389	<	FQSelect.Close;
3390	<	ClearBlobCache;
3391	<	FCurrentRecord := -1;
3392	<	FRecordCount := 0;
3393	<	FDeletedRecords := 0;
3394	<	FBPos := 0;
3395	<	FOBPos := 0;
3396	<	FBEnd := 0;
3397	<	FOBEnd := 0;
3398	<	FQSelect.Close;
3399	<	FQSelect.ExecQuery;
3400	<	FOpen := FQSelect.Open;
3401	<	First;
3402	<	end;
3403	<
3404	<	procedure TIBCustomDataSet.InternalOpen;
3405	<	var
3406	<	SetCursor: Boolean;
3407	<
3408	<	function RecordDataLength(n: Integer): Long;
3409	<	begin
3410	<	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
3411	<	end;
3412	<
3413	<	begin
3414	<	if Assigned(Database) and not Database.SQLHourGlass then
3415	<	SetCursor := False
3416	<	else
3417	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3418	<	if SetCursor then
3419	<	Screen.Cursor := crHourGlass;
3420	<	try
3421	<	ActivateConnection;
3422	<	ActivateTransaction;
3423	<	if FQSelect.SQL.Text = '' then
3424	<	IBError(ibxeEmptyQuery, [nil]);
3425	<	if not FInternalPrepared then
3426	<	InternalPrepare;
3427	<	if FQSelect.SQLType = SQLSelect then
3428	<	begin
3429	<	if DefaultFields then
3430	<	CreateFields;
3431	<	BindFields(True);
3432	<	FCurrentRecord := -1;
3433	<	FQSelect.ExecQuery;
3434	<	FOpen := FQSelect.Open;
3435	<
3436	<	{ Initialize offsets, buffer sizes, etc...
3437	<	1. Initially FRecordSize is just the "RecordDataLength".
3438	<	2. Allocate a "model" buffer and do a dummy fetch
3439	<	3. After the dummy fetch, FRecordSize will be appropriately
3440	<	adjusted to reflect the additional "weight" of the field
3441	<	data.
3442	<	4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize.
3443	<	5. Now, with the BufferSize available, allocate memory for chunks of records
3444	<	6. Re-allocate the model buffer, accounting for the new
3445	<	FRecordBufferSize.
3446	<	7. Finally, calls to AllocRecordBuffer will work!.
3447	<	}
3448	<	{Step 1}
3449	<	FRecordSize := RecordDataLength(FQSelect.Current.Count);
3450	<	{Step 2, 3}
3451	<	IBAlloc(FModelBuffer, 0, FRecordSize);
3452	<	FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer);
3453	<	{Step 4}
3454	<	FCalcFieldsOffset := FRecordSize;
3455	<	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
3456	<	FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
3457	<	{Step 5}
3458	<	if UniDirectional then
3459	<	FBufferChunkSize := FRecordBufferSize * UniCache
3460	<	else
3461	<	FBufferChunkSize := FRecordBufferSize * BufferChunks;
3462	<	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
3463	<	if FCachedUpdates or (csReading in ComponentState) then
3464	<	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
3465	<	FBPos := 0;
3466	<	FOBPos := 0;
3467	<	FBEnd := 0;
3468	<	FOBEnd := 0;
3469	<	FCacheSize := FBufferChunkSize;
3470	<	FOldCacheSize := FBufferChunkSize;
3471	<	{Step 6}
3472	<	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count),
3473	<	FRecordBufferSize);
3474	<	{Step 7}
3475	<	FOldBuffer := AllocRecordBuffer;
3476	<	end
3477	<	else
3478	<	FQSelect.ExecQuery;
3479	<	finally
3480	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3481	<	Screen.Cursor := crDefault;
3482	<	end;
3483	<	end;
3484	<
3485	<	procedure TIBCustomDataSet.InternalPost;
3486	<	var
3487	<	Qry: TIBSQL;
3488	<	Buff: PChar;
3489	<	SetCursor: Boolean;
3490	<	bInserting: Boolean;
3491	<	begin
3492	<	if Assigned(Database) and not Database.SQLHourGlass then
3493	<	SetCursor := False
3494	<	else
3495	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3496	<	if SetCursor then
3497	<	Screen.Cursor := crHourGlass;
3498	<	try
3499	<	Buff := GetActiveBuf;
3500	<	CheckEditState;
3501	<	AdjustRecordOnInsert(Buff);
3502	<	if (State = dsInsert) then
3503	<	begin
3504	<	bInserting := True;
3505	<	Qry := FQInsert;
3506	<	PRecordData(Buff)^.rdUpdateStatus := usInserted;
3507	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3508	<	WriteRecordCache(FRecordCount, Buff);
3509	<	FCurrentRecord := FRecordCount;
3510	<	end
3511	<	else begin
3512	<	bInserting := False;
3513	<	Qry := FQModify;
3514	<	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
3515	<	begin
3516	<	PRecordData(Buff)^.rdUpdateStatus := usModified;
3517	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
3518	<	end
3519	<	else if PRecordData(Buff)^.
3520	<	rdCachedUpdateStatus = cusUninserted then
3521	<	begin
3522	<	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3523	<	Dec(FDeletedRecords);
3524	<	end;
3525	<	end;
3526	<	if (not CachedUpdates) then
3527	<	InternalPostRecord(Qry, Buff)
3528	<	else begin
3529	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3530	<	FUpdatesPending := True;
3531	<	end;
3532	<	if bInserting then
3533	<	Inc(FRecordCount);
3534	<	finally
3535	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3536	<	Screen.Cursor := crDefault;
3537	<	end;
3538	<	end;
3539	<
3540	<	procedure TIBCustomDataSet.InternalRefresh;
3541	<	begin
3542	<	inherited InternalRefresh;
3543	<	InternalRefreshRow;
3544	<	end;
3545	<
3546	<	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
3547	<	begin
3548	<	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
3549	<	end;
3550	<
3551	<	function TIBCustomDataSet.IsCursorOpen: Boolean;
3552	<	begin
3553	<	result := FOpen;
3554	<	end;
3555	<
3556	<	procedure TIBCustomDataSet.Loaded;
3557	<	begin
3558	<	if assigned(FQSelect) then
3559	<	FBaseSQLSelect.assign(FQSelect.SQL);
3560	<	inherited Loaded;
3561	<	end;
3562	<
3563	<	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
3564	<	Options: TLocateOptions): Boolean;
3565	<	var
3566	<	{$IF FPC_FULLVERSION >= 20700 }
3567	<	CurBookmark: TBookmark;
3568	<	{$ELSE}
3569	<	CurBookmark: string;
3570	<	{$ENDIF}
3571	<	begin
3572	<	DisableControls;
3573	<	try
3574	<	CurBookmark := Bookmark;
3575	<	First;
3576	<	result := InternalLocate(KeyFields, KeyValues, Options);
3577	<	if not result then
3578	<	Bookmark := CurBookmark;
3579	<	finally
3580	<	EnableControls;
3581	<	end;
3582	<	end;
3583	<
3584	<	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
3585	<	const ResultFields: string): Variant;
3586	<	var
3587	<	fl: TList;
3588	<	{$IF FPC_FULLVERSION >= 20700 }
3589	<	CurBookmark: TBookmark;
3590	<	{$ELSE}
3591	<	CurBookmark: string;
3592	<	{$ENDIF}
3593	<	begin
3594	<	DisableControls;
3595	<	fl := TList.Create;
3596	<	CurBookmark := Bookmark;
3597	<	try
3598	<	First;
3599	<	if InternalLocate(KeyFields, KeyValues, []) then
3600	<	begin
3601	<	if (ResultFields <> '') then
3602	<	result := FieldValues[ResultFields]
3603	<	else
3604	<	result := NULL;
3605	<	end
3606	<	else
3607	<	result := Null;
3608	<	finally
3609	<	Bookmark := CurBookmark;
3610	<	fl.Free;
3611	<	EnableControls;
3612	<	end;
3613	<	end;
3614	<
3615	<	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
3616	<	begin
3617	<	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
3618	<	end;
3619	<
3620	<	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
3621	<	begin
3622	<	PRecordData(Buffer)^.rdBookmarkFlag := Value;
3623	<	end;
3624	<
3625	<	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
3626	<	begin
3627	<	if not Value and FCachedUpdates then
3628	<	CancelUpdates;
3629	<	if (not (csReading in ComponentState)) and Value then
3630	<	CheckDatasetClosed;
3631	<	FCachedUpdates := Value;
3632	<	end;
3633	<
3634	<	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
3635	<	begin
3636	<	if IsLinkedTo(Value) then
3637	<	IBError(ibxeCircularReference, [nil]);
3638	<	if FDataLink <> nil then
3639	<	FDataLink.DataSource := Value;
3640	<	end;
3641	<
3642	<	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
3643	<	var
3644	<	Buff, TmpBuff: PChar;
3645	<	MappedFieldPos: integer;
3646	<	begin
3647	<	Buff := GetActiveBuf;
3648	<	if Field.FieldNo < 0 then
3649	<	begin
3650	<	TmpBuff := Buff + FRecordSize + Field.Offset;
3651	<	Boolean(TmpBuff[0]) := LongBool(Buffer);
3652	<	if Boolean(TmpBuff[0]) then
3653	<	Move(Buffer^, TmpBuff[1], Field.DataSize);
3654	<	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3655	<	end
3656	<	else begin
3657	<	CheckEditState;
3658	<	with PRecordData(Buff)^ do
3659	<	begin
3660	<	{ If inserting, Adjust record position }
3661	<	AdjustRecordOnInsert(Buff);
3662	<	MappedFieldPos := FMappedFieldPosition[Field.FieldNo - 1];
3663	<	if (MappedFieldPos > 0) and
3664	<	(MappedFieldPos <= rdFieldCount) then
3665	<	begin
3666	<	Field.Validate(Buffer);
3667	<	if (Buffer = nil) or
3668	<	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
3669	<	rdFields[MappedFieldPos].fdIsNull := True
3670	<	else begin
3671	<	Move(Buffer^, Buff[rdFields[MappedFieldPos].fdDataOfs],
3672	<	rdFields[MappedFieldPos].fdDataSize);
3673	<	if (rdFields[MappedFieldPos].fdDataType = SQL_TEXT) or
3674	<	(rdFields[MappedFieldPos].fdDataType = SQL_VARYING) then
3675	<	rdFields[MappedFieldPos].fdDataLength := StrLen(PChar(Buffer));
3676	<	rdFields[MappedFieldPos].fdIsNull := False;
3677	<	if rdUpdateStatus = usUnmodified then
3678	<	begin
3679	<	if CachedUpdates then
3680	<	begin
3681	<	FUpdatesPending := True;
3682	<	if State = dsInsert then
3683	<	rdCachedUpdateStatus := cusInserted
3684	<	else if State = dsEdit then
3685	<	rdCachedUpdateStatus := cusModified;
3686	<	end;
3687	<
3688	<	if State = dsInsert then
3689	<	rdUpdateStatus := usInserted
3690	<	else
3691	<	rdUpdateStatus := usModified;
3692	<	end;
3693	<	WriteRecordCache(rdRecordNumber, Buff);
3694	<	SetModified(True);
3695	<	end;
3696	<	end;
3697	<	end;
3698	<	end;
3699	<	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
3700	<	DataEvent(deFieldChange, PtrInt(Field));
3701	<	end;
3702	<
3703	<	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
3704	<	begin
3705	<	CheckBrowseMode;
3706	<	if (Value < 1) then
3707	<	Value := 1
3708	<	else if Value > FRecordCount then
3709	<	begin
3710	<	InternalLast;
3711	<	Value := Min(FRecordCount, Value);
3712	<	end;
3713	<	if (Value <> RecNo) then
3714	<	begin
3715	<	DoBeforeScroll;
3716	<	FCurrentRecord := Value - 1;
3717	<	Resync([]);
3718	<	DoAfterScroll;
3719	<	end;
3720	<	end;
3721	<
3722	<	procedure TIBCustomDataSet.Disconnect;
3723	<	begin
3724	<	Close;
3725	<	InternalUnPrepare;
3726	<	end;
3727	<
3728	<	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
3729	<	begin
3730	<	if not CanModify then
3731	<	IBError(ibxeCannotUpdate, [nil])
3732	<	else
3733	<	FUpdateMode := Value;
3734	<	end;
3735	<
3736	<
3737	<	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
3738	<	begin
3739	<	if Value <> FUpdateObject then
3740	<	begin
3741	<	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
3742	<	FUpdateObject.DataSet := nil;
3743	<	FUpdateObject := Value;
3744	<	if Assigned(FUpdateObject) then
3745	<	begin
3746	<	if Assigned(FUpdateObject.DataSet) and
3747	<	(FUpdateObject.DataSet <> Self) then
3748	<	FUpdateObject.DataSet.UpdateObject := nil;
3749	<	FUpdateObject.DataSet := Self;
3750	<	end;
3751	<	end;
3752	<	end;
3753	<
3754	<	function TIBCustomDataSet.ConstraintsStored: Boolean;
3755	<	begin
3756	<	Result := Constraints.Count > 0;
3757	<	end;
3758	<
3759	<	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
3760	<	begin
3761	<	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
3762	<	end;
3763	<
3764	<
3765	<	procedure TIBCustomDataSet.InternalUnPrepare;
3766	<	begin
3767	<	if FInternalPrepared then
3768	<	begin
3769	<	CheckDatasetClosed;
3770	<	FieldDefs.Clear;
3771	<	FieldDefs.Updated := false;
3772	<	FInternalPrepared := False;
3773	<	Setlength(FAliasNameList,0);
3774	<	end;
3775	<	end;
3776	<
3777	<	procedure TIBCustomDataSet.InternalExecQuery;
3778	<	var
3779	<	DidActivate: Boolean;
3780	<	SetCursor: Boolean;
3781	<	begin
3782	<	DidActivate := False;
3783	<	if Assigned(Database) and not Database.SQLHourGlass then
3784	<	SetCursor := False
3785	<	else
3786	<	SetCursor := (GetCurrentThreadID = MainThreadID) and (Screen.Cursor = crDefault);
3787	<	if SetCursor then
3788	<	Screen.Cursor := crHourGlass;
3789	<	try
3790	<	ActivateConnection;
3791	<	DidActivate := ActivateTransaction;
3792	<	if FQSelect.SQL.Text = '' then
3793	<	IBError(ibxeEmptyQuery, [nil]);
3794	<	if not FInternalPrepared then
3795	<	InternalPrepare;
3796	<	if FQSelect.SQLType = SQLSelect then
3797	<	begin
3798	<	IBError(ibxeIsASelectStatement, [nil]);
3799	<	end
3800	<	else
3801	<	FQSelect.ExecQuery;
3802	<	finally
3803	<	if DidActivate then
3804	<	DeactivateTransaction;
3805	<	if SetCursor and (Screen.Cursor = crHourGlass) then
3806	<	Screen.Cursor := crDefault;
3807	<	end;
3808	<	end;
3809	<
3810	<	function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE;
3811	<	begin
3812	<	Result := FQSelect.Handle;
3813	<	end;
3814	<
3815	<	function TIBCustomDataSet.GetParser: TSelectSQLParser;
3816	<	begin
3817	<	if not assigned(FParser) then
3818	<	FParser := CreateParser;
3819	<	Result := FParser
3820	<	end;
3821	<
3822	<	procedure TIBCustomDataSet.ResetParser;
3823	<	begin
3824	<	if assigned(FParser) then
3825	<	begin
3826	<	FParser.Free;
3827	<	FParser := nil;
3828	<	SQLChanging(nil)
3829	<	end;
3830	<	end;
3831	<
3832	<	function TIBCustomDataSet.HasParser: boolean;
3833	<	begin
3834	<	Result := not (csDesigning in ComponentState) and (FParser <> nil)
3835	<	end;
3836	<
3837	<	procedure TIBCustomDataSet.SetGenerateParamNames(AValue: Boolean);
3838	<	begin
3839	<	if FGenerateParamNames = AValue then Exit;
3840	<	FGenerateParamNames := AValue;
3841	<	Disconnect
3842	<	end;
3843	<
3844	<	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
3845	<	begin
3846	<	inherited InitRecord(Buffer);
3847	<	with PRecordData(Buffer)^ do
3848	<	begin
3849	<	rdUpdateStatus := TUpdateStatus(usInserted);
3850	<	rdBookMarkFlag := bfInserted;
3851	<	rdRecordNumber := -1;
3852	<	end;
3853	<	end;
3854	<
3855	<	procedure TIBCustomDataSet.InternalInsert;
3856	<	begin
3857	<	CursorPosChanged;
3858	<	end;
3859	<
3860	<	{ TIBDataSet IProviderSupport }
3861	<
3862	<	(*procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
3863	<	begin
3864	<	if Commit then
3865	<	Transaction.Commit else
3866	<	Transaction.Rollback;
3867	<	end;
3868	<
3869	<	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
3870	<	ResultSet: Pointer = nil): Integer;
3871	<	var
3872	<	FQuery: TIBQuery;
3873	<	begin
3874	<	if Assigned(ResultSet) then
3875	<	begin
3876	<	TDataSet(ResultSet^) := TIBQuery.Create(nil);
3877	<	with TIBQuery(ResultSet^) do
3878	<	begin
3879	<	SQL.Text := ASQL;
3880	<	Params.Assign(AParams);
3881	<	Open;
3882	<	Result := RowsAffected;
3883	<	end;
3884	<	end
3885	<	else
3886	<	begin
3887	<	FQuery := TIBQuery.Create(nil);
3888	<	try
3889	<	FQuery.Database := Database;
3890	<	FQuery.Transaction := Transaction;
3891	<	FQuery.GenerateParamNames := True;
3892	<	FQuery.SQL.Text := ASQL;
3893	<	FQuery.Params.Assign(AParams);
3894	<	FQuery.ExecSQL;
3895	<	Result := FQuery.RowsAffected;
3896	<	finally
3897	<	FQuery.Free;
3898	<	end;
3899	<	end;
3900	<	end;
3901	<
3902	<	function TIBCustomDataSet.PSGetQuoteChar: string;
3903	<	begin
3904	<	if Database.SQLDialect = 3 then
3905	<	Result := '"' else
3906	<	Result := '';
3907	<	end;
3908	<
3909	<	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
3910	<	var
3911	<	PrevErr: Integer;
3912	<	begin
3913	<	if Prev <> nil then
3914	<	PrevErr := Prev.ErrorCode else
3915	<	PrevErr := 0;
3916	<	if E is EIBError then
3917	<	with EIBError(E) do
3918	<	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
3919	<	Result := inherited PSGetUpdateException(E, Prev);
3920	<	end;
3921	<
3922	<	function TIBCustomDataSet.PSInTransaction: Boolean;
3923	<	begin
3924	<	Result := Transaction.InTransaction;
3925	<	end;
3926	<
3927	<	function TIBCustomDataSet.PSIsSQLBased: Boolean;
3928	<	begin
3929	<	Result := True;
3930	<	end;
3931	<
3932	<	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
3933	<	begin
3934	<	Result := True;
3935	<	end;
3936	<
3937	<	procedure TIBCustomDataSet.PSReset;
3938	<	begin
3939	<	inherited PSReset;
3940	<	if Active then
3941	<	begin
3942	<	Close;
3943	<	Open;
3944	<	end;
3945	<	end;
3946	<
3947	<	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
3948	<	var
3949	<	UpdateAction: TIBUpdateAction;
3950	<	SQL: string;
3951	<	Params: TParams;
3952	<
3953	<	procedure AssignParams(DataSet: TDataSet; Params: TParams);
3954	<	var
3955	<	I: Integer;
3956	<	Old: Boolean;
3957	<	Param: TParam;
3958	<	PName: string;
3959	<	Field: TField;
3960	<	Value: Variant;
3961	<	begin
3962	<	for I := 0 to Params.Count - 1 do
3963	<	begin
3964	<	Param := Params[I];
3965	<	PName := Param.Name;
3966	<	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
3967	<	if Old then System.Delete(PName, 1, 4);
3968	<	Field := DataSet.FindField(PName);
3969	<	if not Assigned(Field) then Continue;
3970	<	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
3971	<	begin
3972	<	Value := Field.NewValue;
3973	<	if VarIsEmpty(Value) then Value := Field.OldValue;
3974	<	Param.AssignFieldValue(Field, Value);
3975	<	end;
3976	<	end;
3977	<	end;
3978	<
3979	<	begin
3980	<	Result := False;
3981	<	if Assigned(OnUpdateRecord) then
3982	<	begin
3983	<	UpdateAction := uaFail;
3984	<	if Assigned(FOnUpdateRecord) then
3985	<	begin
3986	<	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
3987	<	Result := UpdateAction = uaApplied;
3988	<	end;
3989	<	end
3990	<	else if Assigned(FUpdateObject) then
3991	<	begin
3992	<	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
3993	<	if SQL <> '' then
3994	<	begin
3995	<	Params := TParams.Create;
3996	<	try
3997	<	Params.ParseSQL(SQL, True);
3998	<	AssignParams(Delta, Params);
3999	<	if PSExecuteStatement(SQL, Params) = 0 then
4000	<	IBError(ibxeNoRecordsAffected, [nil]);
4001	<	Result := True;
4002	<	finally
4003	<	Params.Free;
4004	<	end;
4005	<	end;
4006	<	end;
4007	<	end;
4008	<
4009	<	procedure TIBCustomDataSet.PSStartTransaction;
4010	<	begin
4011	<	ActivateConnection;
4012	<	Transaction.StartTransaction;
4013	<	end;
4014	<
4015	<	function TIBCustomDataSet.PSGetTableName: string;
4016	<	begin
4017	<	//  if not FInternalPrepared then
4018	<	//    InternalPrepare;
4019	<	{ It is possible for the FQSelectSQL to be unprepared
4020	<	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
4021	<	So check the Prepared of the SelectSQL instead }
4022	<	if not FQSelect.Prepared then
4023	<	FQSelect.Prepare;
4024	<	Result := FQSelect.UniqueRelationName;
4025	<	end;*)
4026	<
4027	<	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
4028	<	begin
4029	<	InternalBatchInput(InputObject);
4030	<	end;
4031	<
4032	<	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
4033	<	begin
4034	<	InternalBatchOutput(OutputObject);
4035	<	end;
4036	<
4037	<	procedure TIBDataSet.ExecSQL;
4038	<	begin
4039	<	InternalExecQuery;
4040	<	end;
4041	<
4042	<	procedure TIBDataSet.Prepare;
4043	<	begin
4044	<	InternalPrepare;
4045	<	end;
4046	<
4047	<	procedure TIBDataSet.UnPrepare;
4048	<	begin
4049	<	InternalUnPrepare;
4050	<	end;
4051	<
4052	<	function TIBDataSet.GetPrepared: Boolean;
4053	<	begin
4054	<	Result := InternalPrepared;
4055	<	end;
4056	<
4057	<	procedure TIBDataSet.InternalOpen;
4058	<	begin
4059	<	ActivateConnection;
4060	<	ActivateTransaction;
4061	<	InternalSetParamsFromCursor;
4062	<	Inherited InternalOpen;
4063	<	end;
4064	<
4065	<	procedure TIBDataSet.SetFiltered(Value: Boolean);
4066	<	begin
4067	<	if(Filtered <> Value) then
4068	<	begin
4069	<	inherited SetFiltered(value);
4070	<	if Active then
4071	<	begin
4072	<	Close;
4073	<	Open;
4074	<	end;
4075	<	end
4076	<	else
4077	<	inherited SetFiltered(value);
4078	<	end;
4079	<
4080	<	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
4081	<	begin
4082	<	Result := false;
4083	<	if not Assigned(Bookmark) then
4084	<	exit;
4085	<	Result := PInteger(Bookmark)^ < FRecordCount;
4086	<	end;
4087	<
4088	<	function TIBCustomDataSet.GetFieldData(Field: TField;
4089	<	Buffer: Pointer): Boolean;
4090	<	{$IFDEF TBCDFIELD_IS_BCD}
4091	<	var
4092	<	lTempCurr : System.Currency;
4093	<	begin
4094	<	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4095	<	begin
4096	<	Result := InternalGetFieldData(Field, @lTempCurr);
4097	<	if Result then
4098	<	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
4099	<	end
4100	<	else
4101	<	{$ELSE}
4102	<	begin
4103	<	{$ENDIF}
4104	<	Result := InternalGetFieldData(Field, Buffer);
4105	<	end;
4106	<
4107	<	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
4108	<	NativeFormat: Boolean): Boolean;
4109	<	begin
4110	<	if (Field.DataType = ftBCD) and not NativeFormat then
4111	<	Result := InternalGetFieldData(Field, Buffer)
4112	<	else
4113	<	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
4114	<	end;
4115	<
4116	<	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
4117	<	{$IFDEF TDBDFIELD_IS_BCD}
4118	<	var
4119	<	lTempCurr : System.Currency;
4120	<	begin
4121	<	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4122	<	begin
4123	<	BCDToCurr(TBCD(Buffer^), lTempCurr);
4124	<	InternalSetFieldData(Field, @lTempCurr);
4125	<	end
4126	<	else
4127	<	{$ELSE}
4128	<	begin
4129	<	{$ENDIF}
4130	<	InternalSetFieldData(Field, Buffer);
4131	<	end;
4132	<
4133	<	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
4134	<	NativeFormat: Boolean);
4135	<	begin
4136	<	if (not NativeFormat) and (Field.DataType = ftBCD) then
4137	<	InternalSetfieldData(Field, Buffer)
4138	<	else
4139	<	inherited SetFieldData(Field, buffer, NativeFormat);
4140	<	end;
4141	<
4142	<	{ TIBDataSetUpdateObject }
4143	<
4144	<	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
4145	<	begin
4146	<	inherited Create(AOwner);
4147	<	FRefreshSQL := TStringList.Create;
4148	<	end;
4149	<
4150	<	destructor TIBDataSetUpdateObject.Destroy;
4151	<	begin
4152	<	FRefreshSQL.Free;
4153	<	inherited Destroy;
4154	<	end;
4155	<
4156	<	procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings);
4157	<	begin
4158	<	FRefreshSQL.Assign(Value);
4159	<	end;
4160	<
4161	<	procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
4162	<	begin
4163	<	if not Assigned(DataSet) then Exit;
4164	<	DataSet.SetInternalSQLParams(Query, buff);
4165	<	end;
4166	<
4167	<	{ TIBDSBlobStream }
4168	<	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
4169	<	Mode: TBlobStreamMode);
4170	<	begin
4171	<	FField := AField;
4172	<	FBlobStream := ABlobStream;
4173	<	FBlobStream.Seek(0, soFromBeginning);
4174	<	if (Mode = bmWrite) then
4175	<	FBlobStream.Truncate;
4176	<	end;
4177	<
4178	<	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
4179	<	begin
4180	<	result := FBlobStream.Read(Buffer, Count);
4181	<	end;
4182	<
4183	<	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
4184	<	begin
4185	<	result := FBlobStream.Seek(Offset, Origin);
4186	<	end;
4187	<
4188	<	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
4189	<	begin
4190	<	FBlobStream.SetSize(NewSize);
4191	<	end;
4192	<
4193	<	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
4194	<	begin
4195	<	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
4196	<	IBError(ibxeNotEditing, [nil]);
4197	<	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4198	<	TBlobField(FField).Modified := true;
4199	<	result := FBlobStream.Write(Buffer, Count);
4200	<	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4201	<	end;
4202	<
4203	<	{ TIBGenerator }
4204	<
4205	<	procedure TIBGenerator.SetIncrement(const AValue: integer);
4206	<	begin
4207	<	if AValue < 0 then
4208	<	raise Exception.Create('A Generator Increment cannot be negative');
4209	<	FIncrement := AValue
4210	<	end;
4211	<
4212	<	function TIBGenerator.GetNextValue(ADatabase: TIBDatabase;
4213	<	ATransaction: TIBTransaction): integer;
4214	<	begin
4215	<	with TIBSQL.Create(nil) do
4216	<	try
4217	<	Database := ADatabase;
4218	<	Transaction := ATransaction;
4219	<	if not assigned(Database) then
4220	<	IBError(ibxeCannotSetDatabase,[]);
4221	<	if not assigned(Transaction) then
4222	<	IBError(ibxeCannotSetTransaction,[]);
4223	<	with Transaction do
4224	<	if not InTransaction then StartTransaction;
4225	<	SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]);
4226	<	Prepare;
4227	<	ExecQuery;
4228	<	try
4229	<	Result := FieldByName('ID').AsInteger
4230	<	finally
4231	<	Close
4232	<	end;
4233	<	finally
4234	<	Free
4235	<	end;
4236	<	end;
4237	<
4238	<	constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
4239	<	begin
4240	<	FOwner := Owner;
4241	<	FIncrement := 1;
4242	<	end;
4243	<
4244	<
4245	<	procedure TIBGenerator.Apply;
4246	<	begin
4247	<	if (FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then
4248	<	Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction);
4249	<	end;
4250	<
4251	<	end.
1	>	{************************************************************************}
2	>	{                                                                        }
3	>	{       Borland Delphi Visual Component Library                          }
4	>	{       InterBase Express core components                                }
5	>	{                                                                        }
6	>	{       Copyright (c) 1998-2000 Inprise Corporation                      }
7	>	{                                                                        }
8	>	{    InterBase Express is based in part on the product                   }
9	>	{    Free IB Components, written by Gregory H. Deatz for                 }
10	>	{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
11	>	{    Free IB Components is used under license.                           }
12	>	{                                                                        }
13	>	{    The contents of this file are subject to the InterBase              }
14	>	{    Public License Version 1.0 (the "License"); you may not             }
15	>	{    use this file except in compliance with the License. You            }
16	>	{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	>	{    Software distributed under the License is distributed on            }
18	>	{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
19	>	{    express or implied. See the License for the specific language       }
20	>	{    governing rights and limitations under the License.                 }
21	>	{    The Original Code was created by InterBase Software Corporation     }
22	>	{       and its successors.                                              }
23	>	{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
24	>	{       Corporation. All Rights Reserved.                                }
25	>	{    Contributor(s): Jeff Overcash                                       }
26	>	{                                                                        }
27	>	{    IBX For Lazarus (Firebird Express)                                  }
28	>	{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	>	{    Portions created by MWA Software are copyright McCallum Whyman      }
30	>	{    Associates Ltd 2011 - 2015                                                }
31	>	{                                                                        }
32	>	{************************************************************************}
33	>
34	>	unit IBCustomDataSet;
35	>
36	>	{$IF FPC_FULLVERSION >= 20700 }
37	>	{$codepage UTF8}
38	>	{$DEFINE HAS_ANSISTRING_CODEPAGE}
39	>	{$DEFINE NEW_TBOOKMARK}
40	>	{$ENDIF}
41	>
42	>	{$R-}
43	>
44	>	{$Mode Delphi}
45	>
46	>	{$IFDEF DELPHI}
47	>	{$DEFINE TDBDFIELD_IS_BCD}
48	>	{$ENDIF}
49	>
50	>	interface
51	>
52	>	uses
53	>	{$IFDEF WINDOWS }
54	>	Windows,
55	>	{$ELSE}
56	>	unix,
57	>	{$ENDIF}
58	>	SysUtils, Classes, IBDatabase, IBExternals, IB, IBHeader,  IBSQL, Db,
59	>	IBUtils, IBBlob, IBSQLParser;
60	>
61	>	const
62	>	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
63	>	UniCache           =  2;     { Uni-directional cache is 2 records big }
64	>
65	>	type
66	>	TIBCustomDataSet = class;
67	>	TIBDataSet = class;
68	>
69	>	{ TIBDataSetUpdateObject }
70	>
71	>	TIBDataSetUpdateObject = class(TComponent)
72	>	private
73	>	FRefreshSQL: TStrings;
74	>	procedure SetRefreshSQL(value: TStrings);
75	>	protected
76	>	function GetDataSet: TIBCustomDataSet; virtual; abstract;
77	>	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
78	>	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
79	>	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
80	>	procedure InternalSetParams(Query: TIBSQL; buff: PChar);
81	>	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
82	>	public
83	>	constructor Create(AOwner: TComponent); override;
84	>	destructor Destroy; override;
85	>	published
86	>	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
87	>	end;
88	>
89	>	TBlobDataArray = array[0..0] of TIBBlobStream;
90	>	PBlobDataArray = ^TBlobDataArray;
91	>
92	>	{ TIBCustomDataSet }
93	>	TFieldData = record
94	>	fdDataType: Short;
95	>	fdDataScale: Short;
96	>	fdNullable: Boolean;
97	>	fdIsNull: Boolean;
98	>	fdDataSize: Short;
99	>	fdDataLength: Short;
100	>	fdDataOfs: Integer;
101	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
102	>	fdCodePage: TSystemCodePage;
103	>	{$ENDIF}
104	>	end;
105	>	PFieldData = ^TFieldData;
106	>
107	>	TCachedUpdateStatus = (
108	>	cusUnmodified, cusModified, cusInserted,
109	>	cusDeleted, cusUninserted
110	>	);
111	>	TIBDBKey = record
112	>	DBKey: array[0..7] of Byte;
113	>	end;
114	>	PIBDBKey = ^TIBDBKey;
115	>
116	>	TRecordData = record
117	>	rdBookmarkFlag: TBookmarkFlag;
118	>	rdFieldCount: Short;
119	>	rdRecordNumber: Integer;
120	>	rdCachedUpdateStatus: TCachedUpdateStatus;
121	>	rdUpdateStatus: TUpdateStatus;
122	>	rdSavedOffset: DWORD;
123	>	rdDBKey: TIBDBKey;
124	>	rdFields: array[1..1] of TFieldData;
125	>	end;
126	>	PRecordData = ^TRecordData;
127	>
128	>	{ TIBStringField allows us to have strings longer than 8196 }
129	>
130	>	TIBStringField = class(TStringField)
131	>	private
132	>	FCharacterSetName: RawByteString;
133	>	FCharacterSetSize: integer;
134	>	protected
135	>	function GetDefaultWidth: Longint; override;
136	>	public
137	>	constructor Create(aOwner: TComponent); override;
138	>	class procedure CheckTypeSize(Value: Integer); override;
139	>	function GetAsString: string; override;
140	>	function GetAsVariant: Variant; override;
141	>	function GetValue(var Value: string): Boolean;
142	>	procedure SetAsString(const Value: string); override;
143	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
144	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
145	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
146	>	private
147	>	FCodePage: TSystemCodePage;
148	>	public
149	>	property CodePage: TSystemCodePage read FCodePage write FCodePage;
150	>	{$ENDIF}
151	>	end;
152	>
153	>	{ TIBBCDField }
154	>	{  Actually, there is no BCD involved in this type,
155	>	instead it deals with currency types.
156	>	In IB, this is an encapsulation of Numeric (x, y)
157	>	where x < 18 and y <= 4.
158	>	Note: y > 4 will default to Floats
159	>	}
160	>	TIBBCDField = class(TBCDField)
161	>	protected
162	>	class procedure CheckTypeSize(Value: Integer); override;
163	>	function GetAsCurrency: Currency; override;
164	>	function GetAsString: string; override;
165	>	function GetAsVariant: Variant; override;
166	>	function GetDataSize: Integer; override;
167	>	public
168	>	constructor Create(AOwner: TComponent); override;
169	>	published
170	>	property Size default 8;
171	>	end;
172	>
173	>	{TIBMemoField}
174	>	{Allows us to show truncated text in DBGrids and anything else that uses
175	>	DisplayText}
176	>
177	>	TIBMemoField = class(TMemoField)
178	>	private
179	>	FCharacterSetName: RawByteString;
180	>	FCharacterSetSize: integer;
181	>	FDisplayTextAsClassName: boolean;
182	>	function GetTruncatedText: string;
183	>	protected
184	>	function GetAsString: string; override;
185	>	function GetDefaultWidth: Longint; override;
186	>	procedure GetText(var AText: string; ADisplayText: Boolean); override;
187	>	procedure SetAsString(const AValue: string); override;
188	>	public
189	>	constructor Create(AOwner: TComponent); override;
190	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
191	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
192	>	published
193	>	property DisplayTextAsClassName: boolean read FDisplayTextAsClassName
194	>	write FDisplayTextAsClassName;
195	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
196	>	private
197	>	FCodePage: TSystemCodePage;
198	>	FFCodePage: TSystemCodePage;
199	>	public
200	>	property CodePage: TSystemCodePage read FFCodePage write FFCodePage;
201	>	{$ENDIF}
202	>	end;
203	>
204	>	TIBDataLink = class(TDetailDataLink)
205	>	private
206	>	FDataSet: TIBCustomDataSet;
207	>	protected
208	>	procedure ActiveChanged; override;
209	>	procedure RecordChanged(Field: TField); override;
210	>	function GetDetailDataSet: TDataSet; override;
211	>	procedure CheckBrowseMode; override;
212	>	public
213	>	constructor Create(ADataSet: TIBCustomDataSet);
214	>	destructor Destroy; override;
215	>	end;
216	>
217	>	TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord);
218	>
219	>	{ TIBGenerator }
220	>
221	>	TIBGenerator = class(TPersistent)
222	>	private
223	>	FOwner: TIBCustomDataSet;
224	>	FApplyOnEvent: TIBGeneratorApplyOnEvent;
225	>	FFieldName: string;
226	>	FGeneratorName: string;
227	>	FIncrement: integer;
228	>	procedure SetIncrement(const AValue: integer);
229	>	protected
230	>	function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer;
231	>	public
232	>	constructor Create(Owner: TIBCustomDataSet);
233	>	procedure Apply;
234	>	property Owner: TIBCustomDataSet read FOwner;
235	>	published
236	>	property Generator: string read FGeneratorName write FGeneratorName;
237	>	property Field: string read FFieldName write FFieldName;
238	>	property Increment: integer read FIncrement write SetIncrement default 1;
239	>	property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
240	>	end;
241	>
242	>	{TIBControlLink - Allows IB Aware controls to react to dataset state changes}
243	>
244	>	TIBControlLink = class
245	>	private
246	>	FTIBDataSet: TIBCustomDataSet;
247	>	procedure SetIBDataSet(AValue: TIBCustomDataSet);
248	>	protected
249	>	procedure UpdateSQL(Sender: TObject); virtual;
250	>	procedure UpdateParams(Sender: TObject); virtual;
251	>	public
252	>	destructor Destroy; override;
253	>	property IBDataSet: TIBCustomDataSet read FTIBDataSet write SetIBDataSet;
254	>	end;
255	>
256	>	TIBAutoCommit = (acDisabled, acCommitRetaining);
257	>
258	>	{ TIBCustomDataSet }
259	>	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
260	>
261	>	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
262	>	UpdateKind: TUpdateKind; var TheUpdateAction: TIBUpdateAction)
263	>	of object;
264	>	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
265	>	var UpdateAction: TIBUpdateAction) of object;
266	>
267	>	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
268	>
269	>	TDataSetCloseAction = (dcDiscardChanges, dcSaveChanges);
270	>
271	>	TOnValidatePost = procedure (Sender: TObject; var CancelPost: boolean) of object;
272	>
273	>	TIBCustomDataSet = class(TDataset)
274	>	private
275	>	FAutoCommit: TIBAutoCommit;
276	>	FGenerateParamNames: Boolean;
277	>	FGeneratorField: TIBGenerator;
278	>	FNeedsRefresh: Boolean;
279	>	FForcedRefresh: Boolean;
280	>	FDidActivate: Boolean;
281	>	FIBLoaded: Boolean;
282	>	FBase: TIBBase;
283	>	FBlobCacheOffset: Integer;
284	>	FBlobStreamList: TList;
285	>	FBufferChunks: Integer;
286	>	FBufferCache,
287	>	FOldBufferCache: PChar;
288	>	FBufferChunkSize,
289	>	FCacheSize,
290	>	FOldCacheSize: Integer;
291	>	FFilterBuffer: PChar;
292	>	FBPos,
293	>	FOBPos,
294	>	FBEnd,
295	>	FOBEnd: DWord;
296	>	FCachedUpdates: Boolean;
297	>	FCalcFieldsOffset: Integer;
298	>	FCurrentRecord: Long;
299	>	FDeletedRecords: Long;
300	>	FModelBuffer,
301	>	FOldBuffer: PChar;
302	>	FOnValidatePost: TOnValidatePost;
303	>	FOpen: Boolean;
304	>	FInternalPrepared: Boolean;
305	>	FQDelete,
306	>	FQInsert,
307	>	FQRefresh,
308	>	FQSelect,
309	>	FQModify: TIBSQL;
310	>	FRecordBufferSize: Integer;
311	>	FRecordCount: Integer;
312	>	FRecordSize: Integer;
313	>	FDataSetCloseAction: TDataSetCloseAction;
314	>	FUniDirectional: Boolean;
315	>	FUpdateMode: TUpdateMode;
316	>	FUpdateObject: TIBDataSetUpdateObject;
317	>	FParamCheck: Boolean;
318	>	FUpdatesPending: Boolean;
319	>	FUpdateRecordTypes: TIBUpdateRecordTypes;
320	>	FMappedFieldPosition: array of Integer;
321	>	FDataLink: TIBDataLink;
322	>
323	>	FBeforeDatabaseDisconnect,
324	>	FAfterDatabaseDisconnect,
325	>	FDatabaseFree: TNotifyEvent;
326	>	FOnUpdateError: TIBUpdateErrorEvent;
327	>	FOnUpdateRecord: TIBUpdateRecordEvent;
328	>	FBeforeTransactionEnd,
329	>	FAfterTransactionEnd,
330	>	FTransactionFree: TNotifyEvent;
331	>	FAliasNameMap: array of string;
332	>	FAliasNameList: array of string;
333	>	FBaseSQLSelect: TStrings;
334	>	FParser: TSelectSQLParser;
335	>	FCloseAction: TTransactionAction;
336	>	FInTransactionEnd: boolean;
337	>	FIBLinks: TList;
338	>	function GetSelectStmtHandle: TISC_STMT_HANDLE;
339	>	procedure SetUpdateMode(const Value: TUpdateMode);
340	>	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
341	>
342	>	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
343	>	procedure AdjustRecordOnInsert(Buffer: Pointer);
344	>	function CanEdit: Boolean;
345	>	function CanInsert: Boolean;
346	>	function CanDelete: Boolean;
347	>	function CanRefresh: Boolean;
348	>	procedure CheckEditState;
349	>	procedure ClearBlobCache;
350	>	procedure ClearIBLinks;
351	>	procedure CopyRecordBuffer(Source, Dest: Pointer);
352	>	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
353	>	procedure DoAfterDatabaseDisconnect(Sender: TObject);
354	>	procedure DoDatabaseFree(Sender: TObject);
355	>	procedure DoBeforeTransactionEnd(Sender: TObject; Action: TTransactionAction);
356	>	procedure DoAfterTransactionEnd(Sender: TObject);
357	>	procedure DoTransactionFree(Sender: TObject);
358	>	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
359	>	Buffer: PChar);
360	>	function GetDatabase: TIBDatabase;
361	>	function GetDBHandle: PISC_DB_HANDLE;
362	>	function GetDeleteSQL: TStrings;
363	>	function GetInsertSQL: TStrings;
364	>	function GetSQLParams: TIBXSQLDA;
365	>	function GetRefreshSQL: TStrings;
366	>	function GetSelectSQL: TStrings;
367	>	function GetStatementType: TIBSQLTypes;
368	>	function GetModifySQL: TStrings;
369	>	function GetTransaction: TIBTransaction;
370	>	function GetTRHandle: PISC_TR_HANDLE;
371	>	function GetParser: TSelectSQLParser;
372	>	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
373	>	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
374	>	Options: TLocateOptions): Boolean; virtual;
375	>	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
376	>	procedure InternalRevertRecord(RecordNumber: Integer); virtual;
377	>	function IsVisible(Buffer: PChar): Boolean;
378	>	procedure RegisterIBLink(Sender: TIBControlLink);
379	>	procedure UnRegisterIBLink(Sender: TIBControlLink);
380	>	procedure SaveOldBuffer(Buffer: PChar);
381	>	procedure SetBufferChunks(Value: Integer);
382	>	procedure SetDatabase(Value: TIBDatabase);
383	>	procedure SetDeleteSQL(Value: TStrings);
384	>	procedure SetInsertSQL(Value: TStrings);
385	>	procedure SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
386	>	procedure SetRefreshSQL(Value: TStrings);
387	>	procedure SetSelectSQL(Value: TStrings);
388	>	procedure SetModifySQL(Value: TStrings);
389	>	procedure SetTransaction(Value: TIBTransaction);
390	>	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
391	>	procedure SetUniDirectional(Value: Boolean);
392	>	procedure RefreshParams;
393	>	function AdjustPosition(FCache: PChar; Offset: DWORD;
394	>	Origin: Integer): DWORD;
395	>	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
396	>	Buffer: PChar);
397	>	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
398	>	ReadOldBuffer: Boolean);
399	>	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
400	>	Buffer: PChar);
401	>	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
402	>	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
403	>	DoCheck: Boolean): TGetResult; virtual;
404	>
405	>	protected
406	>	procedure ActivateConnection;
407	>	function ActivateTransaction: Boolean;
408	>	procedure DeactivateTransaction;
409	>	procedure CheckDatasetClosed;
410	>	procedure CheckDatasetOpen;
411	>	function CreateParser: TSelectSQLParser; virtual;
412	>	procedure FieldDefsFromQuery(SourceQuery: TIBSQL);
413	>	function GetActiveBuf: PChar;
414	>	procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
415	>	procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
416	>	procedure InternalPrepare; virtual;
417	>	procedure InternalUnPrepare; virtual;
418	>	procedure InternalExecQuery; virtual;
419	>	procedure InternalRefreshRow; virtual;
420	>	procedure InternalSetParamsFromCursor; virtual;
421	>	procedure CheckNotUniDirectional;
422	>	procedure SQLChanging(Sender: TObject); virtual;
423	>	procedure SQLChanged(Sender: TObject); virtual;
424	>
425	>	(*    { IProviderSupport }
426	>	procedure PSEndTransaction(Commit: Boolean); override;
427	>	function PSExecuteStatement(const ASQL: string; AParams: TParams;
428	>	ResultSet: Pointer = nil): Integer; override;
429	>	function PsGetTableName: string; override;
430	>	function PSGetQuoteChar: string; override;
431	>	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
432	>	function PSInTransaction: Boolean; override;
433	>	function PSIsSQLBased: Boolean; override;
434	>	function PSIsSQLSupported: Boolean; override;
435	>	procedure PSStartTransaction; override;
436	>	procedure PSReset; override;
437	>	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
438	>	*)
439	>	{ TDataSet support }
440	>	procedure InternalInsert; override;
441	>	procedure InitRecord(Buffer: PChar); override;
442	>	procedure Disconnect; virtual;
443	>	function ConstraintsStored: Boolean;
444	>	procedure ClearCalcFields(Buffer: PChar); override;
445	>	function AllocRecordBuffer: PChar; override;
446	>	procedure DoBeforeDelete; override;
447	>	procedure DoAfterDelete; override;
448	>	procedure DoBeforeEdit; override;
449	>	procedure DoAfterEdit; override;
450	>	procedure DoBeforeInsert; override;
451	>	procedure DoAfterInsert; override;
452	>	procedure DoBeforeClose; override;
453	>	procedure DoBeforeOpen; override;
454	>	procedure DoBeforePost; override;
455	>	procedure DoAfterPost; override;
456	>	procedure FreeRecordBuffer(var Buffer: PChar); override;
457	>	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
458	>	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
459	>	function GetCanModify: Boolean; override;
460	>	function GetDataSource: TDataSource; override;
461	>	function GetDBAliasName(FieldNo: integer): string;
462	>	function GetFieldDefFromAlias(aliasName: string): TFieldDef;
463	>	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
464	>	function GetRecNo: Integer; override;
465	>	function GetRecord(Buffer: PChar; GetMode: TGetMode;
466	>	DoCheck: Boolean): TGetResult; override;
467	>	function GetRecordCount: Integer; override;
468	>	function GetRecordSize: Word; override;
469	>	procedure InternalAutoCommit;
470	>	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
471	>	procedure InternalCancel; override;
472	>	procedure InternalClose; override;
473	>	procedure InternalDelete; override;
474	>	procedure InternalFirst; override;
475	>	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
476	>	procedure InternalGotoBookmark(Bookmark: Pointer); override;
477	>	procedure InternalHandleException; override;
478	>	procedure InternalInitFieldDefs; override;
479	>	procedure InternalInitRecord(Buffer: PChar); override;
480	>	procedure InternalLast; override;
481	>	procedure InternalOpen; override;
482	>	procedure InternalPost; override;
483	>	procedure InternalRefresh; override;
484	>	procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
485	>	procedure InternalSetToRecord(Buffer: PChar); override;
486	>	function IsCursorOpen: Boolean; override;
487	>	procedure Loaded; override;
488	>	procedure ReQuery;
489	>	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
490	>	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
491	>	procedure SetCachedUpdates(Value: Boolean);
492	>	procedure SetDataSource(Value: TDataSource);
493	>	procedure SetGenerateParamNames(AValue: Boolean); virtual;
494	>	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
495	>	procedure SetFieldData(Field : TField; Buffer : Pointer;
496	>	NativeFormat : Boolean); overload; override;
497	>	procedure SetRecNo(Value: Integer); override;
498	>
499	>	protected
500	>	{Likely to be made public by descendant classes}
501	>	property AutoCommit: TIBAutoCommit read FAutoCommit write FAutoCommit default acDisabled;
502	>	property SQLParams: TIBXSQLDA read GetSQLParams;
503	>	property Params: TIBXSQLDA read GetSQLParams;
504	>	property InternalPrepared: Boolean read FInternalPrepared;
505	>	property QDelete: TIBSQL read FQDelete;
506	>	property QInsert: TIBSQL read FQInsert;
507	>	property QRefresh: TIBSQL read FQRefresh;
508	>	property QSelect: TIBSQL read FQSelect;
509	>	property QModify: TIBSQL read FQModify;
510	>	property StatementType: TIBSQLTypes read GetStatementType;
511	>	property SelectStmtHandle: TISC_STMT_HANDLE read GetSelectStmtHandle;
512	>
513	>	{Likely to be made published by descendant classes}
514	>	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
515	>	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
516	>	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
517	>	property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
518	>	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
519	>	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
520	>	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
521	>	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
522	>	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
523	>	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
524	>	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
525	>	property Parser: TSelectSQLParser read GetParser;
526	>	property BaseSQLSelect: TStrings read FBaseSQLSelect;
527	>
528	>	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
529	>	write FBeforeDatabaseDisconnect;
530	>	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
531	>	write FAfterDatabaseDisconnect;
532	>	property DatabaseFree: TNotifyEvent read FDatabaseFree
533	>	write FDatabaseFree;
534	>	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
535	>	write FBeforeTransactionEnd;
536	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
537	>	write FAfterTransactionEnd;
538	>	property TransactionFree: TNotifyEvent read FTransactionFree
539	>	write FTransactionFree;
540	>	property OnValidatePost: TOnValidatePost read FOnValidatePost write FOnValidatePost;
541	>
542	>	public
543	>	constructor Create(AOwner: TComponent); override;
544	>	destructor Destroy; override;
545	>	procedure ApplyUpdates;
546	>	function CachedUpdateStatus: TCachedUpdateStatus;
547	>	procedure CancelUpdates;
548	>	function GetFieldPosition(AliasName: string): integer;
549	>	procedure FetchAll;
550	>	function LocateNext(const KeyFields: string; const KeyValues: Variant;
551	>	Options: TLocateOptions): Boolean;
552	>	procedure RecordModified(Value: Boolean);
553	>	procedure RevertRecord;
554	>	procedure Undelete;
555	>	procedure ResetParser; virtual;
556	>	function HasParser: boolean;
557	>
558	>	{ TDataSet support methods }
559	>	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
560	>	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
561	>	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
562	>	function GetCurrentRecord(Buffer: PChar): Boolean; override;
563	>	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
564	>	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
565	>	function GetFieldData(Field : TField; Buffer : Pointer;
566	>	NativeFormat : Boolean) : Boolean; overload; override;
567	>	property GenerateParamNames: Boolean read FGenerateParamNames write SetGenerateParamNames;
568	>	function Locate(const KeyFields: string; const KeyValues: Variant;
569	>	Options: TLocateOptions): Boolean; override;
570	>	function Lookup(const KeyFields: string; const KeyValues: Variant;
571	>	const ResultFields: string): Variant; override;
572	>	function UpdateStatus: TUpdateStatus; override;
573	>	function IsSequenced: Boolean; override;
574	>	procedure Post; override;
575	>	function ParamByName(ParamName: String): TIBXSQLVAR;
576	>	property DBHandle: PISC_DB_HANDLE read GetDBHandle;
577	>	property TRHandle: PISC_TR_HANDLE read GetTRHandle;
578	>	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
579	>	property UpdatesPending: Boolean read FUpdatesPending;
580	>	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
581	>	write SetUpdateRecordTypes;
582	>	property DataSetCloseAction: TDataSetCloseAction
583	>	read FDataSetCloseAction write FDataSetCloseAction;
584	>
585	>	published
586	>	property Database: TIBDatabase read GetDatabase write SetDatabase;
587	>	property Transaction: TIBTransaction read GetTransaction
588	>	write SetTransaction;
589	>	property ForcedRefresh: Boolean read FForcedRefresh
590	>	write FForcedRefresh default False;
591	>	property AutoCalcFields;
592	>
593	>	property AfterCancel;
594	>	property AfterClose;
595	>	property AfterDelete;
596	>	property AfterEdit;
597	>	property AfterInsert;
598	>	property AfterOpen;
599	>	property AfterPost;
600	>	property AfterRefresh;
601	>	property AfterScroll;
602	>	property BeforeCancel;
603	>	property BeforeClose;
604	>	property BeforeDelete;
605	>	property BeforeEdit;
606	>	property BeforeInsert;
607	>	property BeforeOpen;
608	>	property BeforePost;
609	>	property BeforeRefresh;
610	>	property BeforeScroll;
611	>	property OnCalcFields;
612	>	property OnDeleteError;
613	>	property OnEditError;
614	>	property OnNewRecord;
615	>	property OnPostError;
616	>	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
617	>	write FOnUpdateError;
618	>	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
619	>	write FOnUpdateRecord;
620	>	end;
621	>
622	>	TIBParserDataSet = class(TIBCustomDataSet)
623	>	public
624	>	property Parser;
625	>	end;
626	>
627	>	TIBDataSet = class(TIBParserDataSet)
628	>	private
629	>	function GetPrepared: Boolean;
630	>
631	>	protected
632	>	procedure SetFiltered(Value: Boolean); override;
633	>	procedure InternalOpen; override;
634	>
635	>	public
636	>	procedure Prepare;
637	>	procedure UnPrepare;
638	>	procedure BatchInput(InputObject: TIBBatchInput);
639	>	procedure BatchOutput(OutputObject: TIBBatchOutput);
640	>	procedure ExecSQL;
641	>
642	>	public
643	>	property Params;
644	>	property Prepared : Boolean read GetPrepared;
645	>	property QDelete;
646	>	property QInsert;
647	>	property QRefresh;
648	>	property QSelect;
649	>	property QModify;
650	>	property StatementType;
651	>	property SelectStmtHandle;
652	>	property BaseSQLSelect;
653	>
654	>	published
655	>	{ TIBCustomDataSet }
656	>	property AutoCommit;
657	>	property BufferChunks;
658	>	property CachedUpdates;
659	>	property DeleteSQL;
660	>	property InsertSQL;
661	>	property RefreshSQL;
662	>	property SelectSQL;
663	>	property ModifySQL;
664	>	property GeneratorField;
665	>	property GenerateParamNames;
666	>	property ParamCheck;
667	>	property UniDirectional;
668	>	property Filtered;
669	>	property DataSetCloseAction;
670	>
671	>	property BeforeDatabaseDisconnect;
672	>	property AfterDatabaseDisconnect;
673	>	property DatabaseFree;
674	>	property BeforeTransactionEnd;
675	>	property AfterTransactionEnd;
676	>	property TransactionFree;
677	>
678	>	{ TIBDataSet }
679	>	property Active;
680	>	property AutoCalcFields;
681	>	property DataSource read GetDataSource write SetDataSource;
682	>
683	>	property AfterCancel;
684	>	property AfterClose;
685	>	property AfterDelete;
686	>	property AfterEdit;
687	>	property AfterInsert;
688	>	property AfterOpen;
689	>	property AfterPost;
690	>	property AfterScroll;
691	>	property BeforeCancel;
692	>	property BeforeClose;
693	>	property BeforeDelete;
694	>	property BeforeEdit;
695	>	property BeforeInsert;
696	>	property BeforeOpen;
697	>	property BeforePost;
698	>	property BeforeScroll;
699	>	property OnCalcFields;
700	>	property OnDeleteError;
701	>	property OnEditError;
702	>	property OnFilterRecord;
703	>	property OnNewRecord;
704	>	property OnPostError;
705	>	property OnValidatePost;
706	>	end;
707	>
708	>	{ TIBDSBlobStream }
709	>	TIBDSBlobStream = class(TStream)
710	>	private
711	>	FHasWritten: boolean;
712	>	protected
713	>	FField: TField;
714	>	FBlobStream: TIBBlobStream;
715	>	function  GetSize: Int64; override;
716	>	public
717	>	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
718	>	Mode: TBlobStreamMode);
719	>	destructor Destroy; override;
720	>	function Read(var Buffer; Count: Longint): Longint; override;
721	>	function Seek(Offset: Longint; Origin: Word): Longint; override;
722	>	procedure SetSize(NewSize: Longint); override;
723	>	function Write(const Buffer; Count: Longint): Longint; override;
724	>	end;
725	>
726	>	const
727	>	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
728	>	nil,                { ftUnknown }
729	>	TIBStringField,     { ftString }
730	>	TSmallintField,     { ftSmallint }
731	>	TIntegerField,      { ftInteger }
732	>	TWordField,         { ftWord }
733	>	TBooleanField,      { ftBoolean }
734	>	TFloatField,        { ftFloat }
735	>	TCurrencyField,     { ftCurrency }
736	>	TIBBCDField,        { ftBCD }
737	>	TDateField,         { ftDate }
738	>	TTimeField,         { ftTime }
739	>	TDateTimeField,     { ftDateTime }
740	>	TBytesField,        { ftBytes }
741	>	TVarBytesField,     { ftVarBytes }
742	>	TAutoIncField,      { ftAutoInc }
743	>	TBlobField,         { ftBlob }
744	>	TIBMemoField,       { ftMemo }
745	>	TGraphicField,      { ftGraphic }
746	>	TBlobField,         { ftFmtMemo }
747	>	TBlobField,         { ftParadoxOle }
748	>	TBlobField,         { ftDBaseOle }
749	>	TBlobField,         { ftTypedBinary }
750	>	nil,                { ftCursor }
751	>	TStringField,       { ftFixedChar }
752	>	nil,    { ftWideString }
753	>	TLargeIntField,     { ftLargeInt }
754	>	nil,          { ftADT }
755	>	nil,        { ftArray }
756	>	nil,    { ftReference }
757	>	nil,     { ftDataSet }
758	>	TBlobField,         { ftOraBlob }
759	>	TMemoField,         { ftOraClob }
760	>	TVariantField,      { ftVariant }
761	>	nil,    { ftInterface }
762	>	nil,     { ftIDispatch }
763	>	TGuidField,        { ftGuid }
764	>	TDateTimeField,    {ftTimestamp}
765	>	TIBBCDField,       {ftFMTBcd}
766	>	nil,  {ftFixedWideChar}
767	>	nil);   {ftWideMemo}
768	>	(*
769	>	TADTField,          { ftADT }
770	>	TArrayField,        { ftArray }
771	>	TReferenceField,    { ftReference }
772	>	TDataSetField,     { ftDataSet }
773	>	TBlobField,         { ftOraBlob }
774	>	TMemoField,         { ftOraClob }
775	>	TVariantField,      { ftVariant }
776	>	TInterfaceField,    { ftInterface }
777	>	TIDispatchField,     { ftIDispatch }
778	>	TGuidField);        { ftGuid } *)
779	>	(*var
780	>	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
781	>
782	>	implementation
783	>
784	>	uses IBIntf, Variants, FmtBCD, LazUTF8, IBCodePage;
785	>
786	>	const FILE_BEGIN = 0;
787	>	FILE_CURRENT = 1;
788	>	FILE_END = 2;
789	>
790	>	type
791	>
792	>	TFieldNode = class(TObject)
793	>	protected
794	>	FieldName : String;
795	>	COMPUTED_BLR : Boolean;
796	>	DEFAULT_VALUE : boolean;
797	>	NextField : TFieldNode;
798	>	end;
799	>
800	>	TRelationNode = class(TObject)
801	>	protected
802	>	RelationName : String;
803	>	FieldNodes : TFieldNode;
804	>	NextRelation : TRelationNode;
805	>	end;
806	>
807	>	{Extended Field Def for character set info}
808	>
809	>	{ TIBFieldDef }
810	>
811	>	TIBFieldDef = class(TFieldDef)
812	>	private
813	>	FCharacterSetName: RawByteString;
814	>	FCharacterSetSize: integer;
815	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
816	>	FCodePage: TSystemCodePage;
817	>	{$ENDIF}
818	>	published
819	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
820	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
821	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
822	>	property CodePage: TSystemCodePage read FCodePage write FCodePage;
823	>	{$ENDIF}
824	>	end;
825	>
826	>
827	>	{  Copied from LCLProc in order to avoid LCL dependency
828	>
829	>	Ensures the covenient look of multiline string
830	>	when displaying it in the single line
831	>	* Replaces CR and LF with spaces
832	>	* Removes duplicate spaces
833	>	}
834	>	function TextToSingleLine(const AText: string): string;
835	>	var
836	>	str: string;
837	>	i, wstart, wlen: Integer;
838	>	begin
839	>	str := Trim(AText);
840	>	wstart := 0;
841	>	wlen := 0;
842	>	i := 1;
843	>	while i < Length(str) - 1 do
844	>	begin
845	>	if (str[i] in [' ', #13, #10]) then
846	>	begin
847	>	if (wstart = 0) then
848	>	begin
849	>	wstart := i;
850	>	wlen := 1;
851	>	end else
852	>	Inc(wlen);
853	>	end else
854	>	begin
855	>	if wstart > 0 then
856	>	begin
857	>	str[wstart] := ' ';
858	>	Delete(str, wstart+1, wlen-1);
859	>	Dec(i, wlen-1);
860	>	wstart := 0;
861	>	end;
862	>	end;
863	>	Inc(i);
864	>	end;
865	>	Result := str;
866	>	end;
867	>
868	>	{ TIBMemoField }
869	>
870	>	function TIBMemoField.GetTruncatedText: string;
871	>	begin
872	>	Result := GetAsString;
873	>
874	>	if Result <> '' then
875	>	begin
876	>	case CharacterSetSize of
877	>	1:
878	>	if DisplayWidth = 0 then
879	>	Result := TextToSingleLine(Result)
880	>	else
881	>	if Length(Result) > DisplayWidth then {Show truncation with elipses}
882	>	Result := TextToSingleLine(system.copy(Result,1,DisplayWidth-3)) + '...';
883	>
884	>	{2: case 2 ignored. This should be handled by TIBWideMemo}
885	>
886	>	3, {Assume UNICODE_FSS is really UTF8}
887	>	4: {Include GB18030 - assuming UTF8 routine work for this codeset}
888	>	if DisplayWidth = 0 then
889	>	Result := ValidUTF8String(TextToSingleLine(Result))
890	>	else
891	>	if UTF8Length(Result) > DisplayWidth then {Show truncation with elipses}
892	>	Result := ValidUTF8String(TextToSingleLine(UTF8Copy(Result,1,DisplayWidth-3))) + '...';
893	>	end;
894	>	end
895	>	end;
896	>
897	>	function TIBMemoField.GetAsString: string;
898	>	var s: RawByteString;
899	>	begin
900	>	s := inherited GetAsString;
901	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
902	>	SetCodePage(s,CodePage,false);
903	>	if (CodePage <> CP_NONE) and (CodePage <> CP_UTF8) then
904	>	SetCodePage(s,CP_UTF8,true);  {LCL only accepts UTF8}
905	>	{$ENDIF}
906	>	Result := s;
907	>	end;
908	>
909	>	function TIBMemoField.GetDefaultWidth: Longint;
910	>	begin
911	>	if DisplayTextAsClassName then
912	>	Result := inherited
913	>	else
914	>	Result := 128;
915	>	end;
916	>
917	>	procedure TIBMemoField.GetText(var AText: string; ADisplayText: Boolean);
918	>	begin
919	>	if ADisplayText then
920	>	begin
921	>	if not DisplayTextAsClassName and (CharacterSetName <> '') then
922	>	AText := GetTruncatedText
923	>	else
924	>	inherited GetText(AText, ADisplayText);
925	>	end
926	>	else
927	>	AText := GetAsString;
928	>	end;
929	>
930	>	procedure TIBMemoField.SetAsString(const AValue: string);
931	>	var s: RawByteString;
932	>	begin
933	>	s := AValue;
934	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
935	>	if StringCodePage(Value) <> CodePage then
936	>	SetCodePage(s,CodePage,CodePage<>CP_NONE);
937	>	{$ENDIF}
938	>	inherited SetAsString(s);
939	>	end;
940	>
941	>	constructor TIBMemoField.Create(AOwner: TComponent);
942	>	begin
943	>	inherited Create(AOwner);
944	>	BlobType := ftMemo;
945	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
946	>	FCodePage := CP_NONE;
947	>	{$ENDIF}
948	>	end;
949	>
950	>	{ TIBControlLink }
951	>
952	>	destructor TIBControlLink.Destroy;
953	>	begin
954	>	IBDataSet := nil;
955	>	inherited Destroy;
956	>	end;
957	>
958	>	procedure TIBControlLink.UpdateParams(Sender: TObject);
959	>	begin
960	>
961	>	end;
962	>
963	>	procedure TIBControlLink.UpdateSQL(Sender: TObject);
964	>	begin
965	>
966	>	end;
967	>
968	>	procedure TIBControlLink.SetIBDataSet(AValue: TIBCustomDataSet);
969	>	begin
970	>	if FTIBDataSet = AValue then Exit;
971	>	if IBDataSet <> nil then
972	>	IBDataSet.UnRegisterIBLink(self);
973	>	FTIBDataSet := AValue;
974	>	if IBDataSet <> nil then
975	>	IBDataSet.RegisterIBLink(self);
976	>	end;
977	>
978	>
979	>	{ TIBStringField}
980	>
981	>	function TIBStringField.GetDefaultWidth: Longint;
982	>	begin
983	>	Result := Size div CharacterSetSize;
984	>	end;
985	>
986	>	constructor TIBStringField.Create(aOwner: TComponent);
987	>	begin
988	>	inherited Create(aOwner);
989	>	FCharacterSetSize := 1;
990	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
991	>	FCodePage := CP_NONE;
992	>	{$ENDIF}
993	>	end;
994	>
995	>	class procedure TIBStringField.CheckTypeSize(Value: Integer);
996	>	begin
997	>	{ don't check string size. all sizes valid }
998	>	end;
999	>
1000	>	function TIBStringField.GetAsString: string;
1001	>	begin
1002	>	if not GetValue(Result) then Result := '';
1003	>	end;
1004	>
1005	>	function TIBStringField.GetAsVariant: Variant;
1006	>	var
1007	>	S: string;
1008	>	begin
1009	>	if GetValue(S) then Result := S else Result := Null;
1010	>	end;
1011	>
1012	>	function TIBStringField.GetValue(var Value: string): Boolean;
1013	>	var
1014	>	Buffer: PChar;
1015	>	s: RawByteString;
1016	>	//  i: integer;
1017	>	begin
1018	>	Buffer := nil;
1019	>	IBAlloc(Buffer, 0, Size + 1);
1020	>	try
1021	>	Result := GetData(Buffer);
1022	>	if Result then
1023	>	begin
1024	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1025	>	s := string(Buffer);
1026	>	SetCodePage(s,CodePage,false);
1027	>	if (CodePage <> CP_NONE) and (CodePage <> CP_UTF8) then
1028	>	SetCodePage(s,CP_UTF8,true);  {LCL only accepts UTF8}
1029	>	Value := s;
1030	>	(*      write(FieldName,': ', StringCodePage(Value),', ',Value,' ');
1031	>	for i := 1 to Length(Value) do
1032	>	write(Format('%x ',[byte(Value[i])]));
1033	>	writeln;*)
1034	>	{$ELSE}
1035	>	Value := string(Buffer);
1036	>	{$ENDIF}
1037	>	if Transliterate and (Value <> '') then
1038	>	DataSet.Translate(PChar(Value), PChar(Value), False);
1039	>	end
1040	>	finally
1041	>	FreeMem(Buffer);
1042	>	end;
1043	>	end;
1044	>
1045	>	procedure TIBStringField.SetAsString(const Value: string);
1046	>	var
1047	>	Buffer: PChar;
1048	>	s: RawByteString;
1049	>	begin
1050	>	Buffer := nil;
1051	>	IBAlloc(Buffer, 0, Size + 1);
1052	>	try
1053	>	s := Value;
1054	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1055	>	if StringCodePage(s) <> CodePage then
1056	>	SetCodePage(s,CodePage,CodePage<>CP_NONE);
1057	>	{$ENDIF}
1058	>	StrLCopy(Buffer, PChar(s), Size);
1059	>	if Transliterate then
1060	>	DataSet.Translate(Buffer, Buffer, True);
1061	>	SetData(Buffer);
1062	>	finally
1063	>	FreeMem(Buffer);
1064	>	end;
1065	>	end;
1066	>
1067	>
1068	>	{ TIBBCDField }
1069	>
1070	>	constructor TIBBCDField.Create(AOwner: TComponent);
1071	>	begin
1072	>	inherited Create(AOwner);
1073	>	SetDataType(ftBCD);
1074	>	Size := 8;
1075	>	end;
1076	>
1077	>	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
1078	>	begin
1079	>	{ No need to check as the base type is currency, not BCD }
1080	>	end;
1081	>
1082	>	function TIBBCDField.GetAsCurrency: Currency;
1083	>	begin
1084	>	if not GetValue(Result) then
1085	>	Result := 0;
1086	>	end;
1087	>
1088	>	function TIBBCDField.GetAsString: string;
1089	>	var
1090	>	C: System.Currency;
1091	>	begin
1092	>	if GetValue(C) then
1093	>	Result := CurrToStr(C)
1094	>	else
1095	>	Result := '';
1096	>	end;
1097	>
1098	>	function TIBBCDField.GetAsVariant: Variant;
1099	>	var
1100	>	C: System.Currency;
1101	>	begin
1102	>	if GetValue(C) then
1103	>	Result := C
1104	>	else
1105	>	Result := Null;
1106	>	end;
1107	>
1108	>	function TIBBCDField.GetDataSize: Integer;
1109	>	begin
1110	>	{$IFDEF TBCDFIELD_IS_BCD}
1111	>	Result := 8;
1112	>	{$ELSE}
1113	>	Result := inherited GetDataSize
1114	>	{$ENDIF}
1115	>	end;
1116	>
1117	>	{ TIBDataLink }
1118	>
1119	>	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
1120	>	begin
1121	>	inherited Create;
1122	>	FDataSet := ADataSet;
1123	>	end;
1124	>
1125	>	destructor TIBDataLink.Destroy;
1126	>	begin
1127	>	FDataSet.FDataLink := nil;
1128	>	inherited Destroy;
1129	>	end;
1130	>
1131	>
1132	>	procedure TIBDataLink.ActiveChanged;
1133	>	begin
1134	>	if FDataSet.Active then
1135	>	FDataSet.RefreshParams;
1136	>	end;
1137	>
1138	>
1139	>	function TIBDataLink.GetDetailDataSet: TDataSet;
1140	>	begin
1141	>	Result := FDataSet;
1142	>	end;
1143	>
1144	>	procedure TIBDataLink.RecordChanged(Field: TField);
1145	>	begin
1146	>	if (Field = nil) and FDataSet.Active then
1147	>	FDataSet.RefreshParams;
1148	>	end;
1149	>
1150	>	procedure TIBDataLink.CheckBrowseMode;
1151	>	begin
1152	>	if FDataSet.Active then
1153	>	FDataSet.CheckBrowseMode;
1154	>	end;
1155	>
1156	>	{ TIBCustomDataSet }
1157	>
1158	>	constructor TIBCustomDataSet.Create(AOwner: TComponent);
1159	>	begin
1160	>	inherited Create(AOwner);
1161	>	FIBLoaded := False;
1162	>	CheckIBLoaded;
1163	>	FIBLoaded := True;
1164	>	FBase := TIBBase.Create(Self);
1165	>	FIBLinks := TList.Create;
1166	>	FCurrentRecord := -1;
1167	>	FDeletedRecords := 0;
1168	>	FUniDirectional := False;
1169	>	FBufferChunks := BufferCacheSize;
1170	>	FBlobStreamList := TList.Create;
1171	>	FGeneratorField := TIBGenerator.Create(self);
1172	>	FDataLink := TIBDataLink.Create(Self);
1173	>	FQDelete := TIBSQL.Create(Self);
1174	>	FQDelete.OnSQLChanging := SQLChanging;
1175	>	FQDelete.GoToFirstRecordOnExecute := False;
1176	>	FQInsert := TIBSQL.Create(Self);
1177	>	FQInsert.OnSQLChanging := SQLChanging;
1178	>	FQInsert.GoToFirstRecordOnExecute := False;
1179	>	FQRefresh := TIBSQL.Create(Self);
1180	>	FQRefresh.OnSQLChanging := SQLChanging;
1181	>	FQRefresh.GoToFirstRecordOnExecute := False;
1182	>	FQSelect := TIBSQL.Create(Self);
1183	>	FQSelect.OnSQLChanging := SQLChanging;
1184	>	FQSelect.OnSQLChanged := SQLChanged;
1185	>	FQSelect.GoToFirstRecordOnExecute := False;
1186	>	FQModify := TIBSQL.Create(Self);
1187	>	FQModify.OnSQLChanging := SQLChanging;
1188	>	FQModify.GoToFirstRecordOnExecute := False;
1189	>	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
1190	>	FParamCheck := True;
1191	>	FGenerateParamNames := False;
1192	>	FForcedRefresh := False;
1193	>	FAutoCommit:= acDisabled;
1194	>	FDataSetCloseAction := dcDiscardChanges;
1195	>	{Bookmark Size is Integer for IBX}
1196	>	BookmarkSize := SizeOf(Integer);
1197	>	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
1198	>	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
1199	>	FBase.OnDatabaseFree := DoDatabaseFree;
1200	>	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
1201	>	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
1202	>	FBase.OnTransactionFree := DoTransactionFree;
1203	>	if AOwner is TIBDatabase then
1204	>	Database := TIBDatabase(AOwner)
1205	>	else
1206	>	if AOwner is TIBTransaction then
1207	>	Transaction := TIBTransaction(AOwner);
1208	>	FBaseSQLSelect := TStringList.Create;
1209	>	end;
1210	>
1211	>	destructor TIBCustomDataSet.Destroy;
1212	>	begin
1213	>	if Active then Active := false;
1214	>	if FIBLoaded then
1215	>	begin
1216	>	if assigned(FGeneratorField) then FGeneratorField.Free;
1217	>	FDataLink.Free;
1218	>	FBase.Free;
1219	>	ClearBlobCache;
1220	>	ClearIBLinks;
1221	>	FIBLinks.Free;
1222	>	FBlobStreamList.Free;
1223	>	FreeMem(FBufferCache);
1224	>	FBufferCache := nil;
1225	>	FreeMem(FOldBufferCache);
1226	>	FOldBufferCache := nil;
1227	>	FCacheSize := 0;
1228	>	FOldCacheSize := 0;
1229	>	FMappedFieldPosition := nil;
1230	>	end;
1231	>	if assigned(FBaseSQLSelect) then FBaseSQLSelect.Free;
1232	>	if assigned(FParser) then FParser.Free;
1233	>	inherited Destroy;
1234	>	end;
1235	>
1236	>	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
1237	>	TGetResult;
1238	>	begin
1239	>	while not IsVisible(Buffer) do
1240	>	begin
1241	>	if GetMode = gmPrior then
1242	>	begin
1243	>	Dec(FCurrentRecord);
1244	>	if FCurrentRecord = -1 then
1245	>	begin
1246	>	result := grBOF;
1247	>	exit;
1248	>	end;
1249	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1250	>	end
1251	>	else begin
1252	>	Inc(FCurrentRecord);
1253	>	if (FCurrentRecord = FRecordCount) then
1254	>	begin
1255	>	if (not FQSelect.EOF) and (FQSelect.Next <> nil) then
1256	>	begin
1257	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
1258	>	Inc(FRecordCount);
1259	>	end
1260	>	else begin
1261	>	result := grEOF;
1262	>	exit;
1263	>	end;
1264	>	end
1265	>	else
1266	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1267	>	end;
1268	>	end;
1269	>	result := grOK;
1270	>	end;
1271	>
1272	>	procedure TIBCustomDataSet.ApplyUpdates;
1273	>	var
1274	>	{$IFDEF NEW_TBOOKMARK }
1275	>	CurBookmark: TBookmark;
1276	>	{$ELSE}
1277	>	CurBookmark: string;
1278	>	{$ENDIF}
1279	>	Buffer: PRecordData;
1280	>	CurUpdateTypes: TIBUpdateRecordTypes;
1281	>	UpdateAction: TIBUpdateAction;
1282	>	UpdateKind: TUpdateKind;
1283	>	bRecordsSkipped: Boolean;
1284	>
1285	>	procedure GetUpdateKind;
1286	>	begin
1287	>	case Buffer^.rdCachedUpdateStatus of
1288	>	cusModified:
1289	>	UpdateKind := ukModify;
1290	>	cusInserted:
1291	>	UpdateKind := ukInsert;
1292	>	else
1293	>	UpdateKind := ukDelete;
1294	>	end;
1295	>	end;
1296	>
1297	>	procedure ResetBufferUpdateStatus;
1298	>	begin
1299	>	case Buffer^.rdCachedUpdateStatus of
1300	>	cusModified:
1301	>	begin
1302	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1303	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1304	>	end;
1305	>	cusInserted:
1306	>	begin
1307	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1308	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1309	>	end;
1310	>	cusDeleted:
1311	>	begin
1312	>	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
1313	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1314	>	end;
1315	>	end;
1316	>	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
1317	>	end;
1318	>
1319	>	procedure UpdateUsingOnUpdateRecord;
1320	>	begin
1321	>	UpdateAction := uaFail;
1322	>	try
1323	>	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
1324	>	except
1325	>	on E: Exception do
1326	>	begin
1327	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1328	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1329	>	if UpdateAction = uaFail then
1330	>	raise;
1331	>	end;
1332	>	end;
1333	>	end;
1334	>
1335	>	procedure UpdateUsingUpdateObject;
1336	>	begin
1337	>	try
1338	>	FUpdateObject.Apply(UpdateKind,PChar(Buffer));
1339	>	ResetBufferUpdateStatus;
1340	>	except
1341	>	on E: Exception do
1342	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1343	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1344	>	end;
1345	>	end;
1346	>
1347	>	procedure UpdateUsingInternalquery;
1348	>	begin
1349	>	try
1350	>	case Buffer^.rdCachedUpdateStatus of
1351	>	cusModified:
1352	>	InternalPostRecord(FQModify, Buffer);
1353	>	cusInserted:
1354	>	InternalPostRecord(FQInsert, Buffer);
1355	>	cusDeleted:
1356	>	InternalDeleteRecord(FQDelete, Buffer);
1357	>	end;
1358	>	except
1359	>	on E: EIBError do begin
1360	>	UpdateAction := uaFail;
1361	>	if Assigned(FOnUpdateError) then
1362	>	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
1363	>	case UpdateAction of
1364	>	uaFail: raise;
1365	>	uaAbort: SysUtils.Abort;
1366	>	uaSkip: bRecordsSkipped := True;
1367	>	end;
1368	>	end;
1369	>	end;
1370	>	end;
1371	>
1372	>	begin
1373	>	if State in [dsEdit, dsInsert] then
1374	>	Post;
1375	>	FBase.CheckDatabase;
1376	>	FBase.CheckTransaction;
1377	>	DisableControls;
1378	>	CurBookmark := Bookmark;
1379	>	CurUpdateTypes := FUpdateRecordTypes;
1380	>	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1381	>	try
1382	>	First;
1383	>	bRecordsSkipped := False;
1384	>	while not EOF do
1385	>	begin
1386	>	Buffer := PRecordData(GetActiveBuf);
1387	>	GetUpdateKind;
1388	>	UpdateAction := uaApply;
1389	>	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
1390	>	begin
1391	>	if (Assigned(FOnUpdateRecord)) then
1392	>	UpdateUsingOnUpdateRecord
1393	>	else
1394	>	if Assigned(FUpdateObject) then
1395	>	UpdateUsingUpdateObject;
1396	>	case UpdateAction of
1397	>	uaFail:
1398	>	IBError(ibxeUserAbort, [nil]);
1399	>	uaAbort:
1400	>	SysUtils.Abort;
1401	>	uaApplied:
1402	>	ResetBufferUpdateStatus;
1403	>	uaSkip:
1404	>	bRecordsSkipped := True;
1405	>	uaRetry:
1406	>	Continue;
1407	>	end;
1408	>	end;
1409	>	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
1410	>	begin
1411	>	UpdateUsingInternalquery;
1412	>	UpdateAction := uaApplied;
1413	>	end;
1414	>	Next;
1415	>	end;
1416	>	FUpdatesPending := bRecordsSkipped;
1417	>	finally
1418	>	FUpdateRecordTypes := CurUpdateTypes;
1419	>	Bookmark := CurBookmark;
1420	>	EnableControls;
1421	>	end;
1422	>	end;
1423	>
1424	>	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1425	>	begin
1426	>	FQSelect.BatchInput(InputObject);
1427	>	end;
1428	>
1429	>	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1430	>	var
1431	>	Qry: TIBSQL;
1432	>	begin
1433	>	Qry := TIBSQL.Create(Self);
1434	>	try
1435	>	Qry.Database := FBase.Database;
1436	>	Qry.Transaction := FBase.Transaction;
1437	>	Qry.SQL.Assign(FQSelect.SQL);
1438	>	Qry.BatchOutput(OutputObject);
1439	>	finally
1440	>	Qry.Free;
1441	>	end;
1442	>	end;
1443	>
1444	>	procedure TIBCustomDataSet.CancelUpdates;
1445	>	var
1446	>	CurUpdateTypes: TIBUpdateRecordTypes;
1447	>	begin
1448	>	if State in [dsEdit, dsInsert] then
1449	>	Post;
1450	>	if FCachedUpdates and FUpdatesPending then
1451	>	begin
1452	>	DisableControls;
1453	>	CurUpdateTypes := UpdateRecordTypes;
1454	>	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1455	>	try
1456	>	First;
1457	>	while not EOF do
1458	>	begin
1459	>	if UpdateStatus = usInserted then
1460	>	RevertRecord
1461	>	else
1462	>	begin
1463	>	RevertRecord;
1464	>	Next;
1465	>	end;
1466	>	end;
1467	>	finally
1468	>	UpdateRecordTypes := CurUpdateTypes;
1469	>	First;
1470	>	FUpdatesPending := False;
1471	>	EnableControls;
1472	>	end;
1473	>	end;
1474	>	end;
1475	>
1476	>	function TIBCustomDataSet.GetFieldPosition(AliasName: string): integer;
1477	>	var i: integer;
1478	>	Prepared: boolean;
1479	>	begin
1480	>	Result := 0;
1481	>	Prepared := FInternalPrepared;
1482	>	if not Prepared then
1483	>	InternalPrepare;
1484	>	try
1485	>	for i := 0 to Length(FAliasNameList) - 1 do
1486	>	if FAliasNameList[i] = AliasName then
1487	>	begin
1488	>	Result := i + 1;
1489	>	Exit
1490	>	end;
1491	>	finally
1492	>	if not Prepared then
1493	>	InternalUnPrepare;
1494	>	end;
1495	>	end;
1496	>
1497	>	procedure TIBCustomDataSet.ActivateConnection;
1498	>	begin
1499	>	if not Assigned(Database) then
1500	>	IBError(ibxeDatabaseNotAssigned, [nil]);
1501	>	if not Assigned(Transaction) then
1502	>	IBError(ibxeTransactionNotAssigned, [nil]);
1503	>	if not Database.Connected then Database.Open;
1504	>	end;
1505	>
1506	>	function TIBCustomDataSet.ActivateTransaction: Boolean;
1507	>	begin
1508	>	Result := False;
1509	>	if not Assigned(Transaction) then
1510	>	IBError(ibxeTransactionNotAssigned, [nil]);
1511	>	if not Transaction.Active then
1512	>	begin
1513	>	Result := True;
1514	>	Transaction.StartTransaction;
1515	>	FDidActivate := True;
1516	>	end;
1517	>	end;
1518	>
1519	>	procedure TIBCustomDataSet.DeactivateTransaction;
1520	>	var
1521	>	i: Integer;
1522	>	begin
1523	>	if not Assigned(Transaction) then
1524	>	IBError(ibxeTransactionNotAssigned, [nil]);
1525	>	with Transaction do
1526	>	begin
1527	>	for i := 0 to SQLObjectCount - 1 do
1528	>	begin
1529	>	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1530	>	begin
1531	>	if TDataSet(SQLObjects[i].owner).Active then
1532	>	begin
1533	>	FDidActivate := False;
1534	>	exit;
1535	>	end;
1536	>	end;
1537	>	end;
1538	>	end;
1539	>	FInternalPrepared := False;
1540	>	if Transaction.InTransaction then
1541	>	Transaction.Commit;
1542	>	FDidActivate := False;
1543	>	end;
1544	>
1545	>	procedure TIBCustomDataSet.CheckDatasetClosed;
1546	>	begin
1547	>	if FOpen then
1548	>	IBError(ibxeDatasetOpen, [nil]);
1549	>	end;
1550	>
1551	>	procedure TIBCustomDataSet.CheckDatasetOpen;
1552	>	begin
1553	>	if not FOpen then
1554	>	IBError(ibxeDatasetClosed, [nil]);
1555	>	end;
1556	>
1557	>	function TIBCustomDataSet.CreateParser: TSelectSQLParser;
1558	>	begin
1559	>	Result := TSelectSQLParser.Create(self,FBaseSQLSelect);
1560	>	Result.OnSQLChanging := SQLChanging
1561	>	end;
1562	>
1563	>	procedure TIBCustomDataSet.CheckNotUniDirectional;
1564	>	begin
1565	>	if UniDirectional then
1566	>	IBError(ibxeDataSetUniDirectional, [nil]);
1567	>	end;
1568	>
1569	>	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1570	>	begin
1571	>	with PRecordData(Buffer)^ do
1572	>	if (State = dsInsert) and (not Modified) then
1573	>	begin
1574	>	rdRecordNumber := FRecordCount;
1575	>	FCurrentRecord := FRecordCount;
1576	>	end;
1577	>	end;
1578	>
1579	>	function TIBCustomDataSet.CanEdit: Boolean;
1580	>	var
1581	>	Buff: PRecordData;
1582	>	begin
1583	>	Buff := PRecordData(GetActiveBuf);
1584	>	result := (FQModify.SQL.Text <> '') or
1585	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1586	>	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1587	>	(FCachedUpdates));
1588	>	end;
1589	>
1590	>	function TIBCustomDataSet.CanInsert: Boolean;
1591	>	begin
1592	>	result := (FQInsert.SQL.Text <> '') or
1593	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1594	>	end;
1595	>
1596	>	function TIBCustomDataSet.CanDelete: Boolean;
1597	>	begin
1598	>	if (FQDelete.SQL.Text <> '') or
1599	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1600	>	result := True
1601	>	else
1602	>	result := False;
1603	>	end;
1604	>
1605	>	function TIBCustomDataSet.CanRefresh: Boolean;
1606	>	begin
1607	>	result := (FQRefresh.SQL.Text <> '') or
1608	>	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1609	>	end;
1610	>
1611	>	procedure TIBCustomDataSet.CheckEditState;
1612	>	begin
1613	>	case State of
1614	>	{ Check all the wsEditMode types }
1615	>	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1616	>	dsNewValue, dsInternalCalc :
1617	>	begin
1618	>	if (State in [dsEdit]) and (not CanEdit) then
1619	>	IBError(ibxeCannotUpdate, [nil]);
1620	>	if (State in [dsInsert]) and (not CanInsert) then
1621	>	IBError(ibxeCannotInsert, [nil]);
1622	>	end;
1623	>	else
1624	>	IBError(ibxeNotEditing, [])
1625	>	end;
1626	>	end;
1627	>
1628	>	procedure TIBCustomDataSet.ClearBlobCache;
1629	>	var
1630	>	i: Integer;
1631	>	begin
1632	>	for i := 0 to FBlobStreamList.Count - 1 do
1633	>	begin
1634	>	TIBBlobStream(FBlobStreamList[i]).Free;
1635	>	FBlobStreamList[i] := nil;
1636	>	end;
1637	>	FBlobStreamList.Pack;
1638	>	end;
1639	>
1640	>	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1641	>	begin
1642	>	Move(Source^, Dest^, FRecordBufferSize);
1643	>	end;
1644	>
1645	>	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1646	>	begin
1647	>	if Active then
1648	>	Active := False;
1649	>	FInternalPrepared := False;
1650	>	if Assigned(FBeforeDatabaseDisconnect) then
1651	>	FBeforeDatabaseDisconnect(Sender);
1652	>	end;
1653	>
1654	>	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1655	>	begin
1656	>	if Assigned(FAfterDatabaseDisconnect) then
1657	>	FAfterDatabaseDisconnect(Sender);
1658	>	end;
1659	>
1660	>	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1661	>	begin
1662	>	if Assigned(FDatabaseFree) then
1663	>	FDatabaseFree(Sender);
1664	>	end;
1665	>
1666	>	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject;
1667	>	Action: TTransactionAction);
1668	>	begin
1669	>	FCloseAction := Action;
1670	>	FInTransactionEnd := true;
1671	>	try
1672	>	if Active then
1673	>	Active := False;
1674	>	finally
1675	>	FInTransactionEnd := false;
1676	>	end;
1677	>	if FQSelect <> nil then
1678	>	FQSelect.FreeHandle;
1679	>	if FQDelete <> nil then
1680	>	FQDelete.FreeHandle;
1681	>	if FQInsert <> nil then
1682	>	FQInsert.FreeHandle;
1683	>	if FQModify <> nil then
1684	>	FQModify.FreeHandle;
1685	>	if FQRefresh <> nil then
1686	>	FQRefresh.FreeHandle;
1687	>	if Assigned(FBeforeTransactionEnd) then
1688	>	FBeforeTransactionEnd(Sender);
1689	>	end;
1690	>
1691	>	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1692	>	begin
1693	>	if Assigned(FAfterTransactionEnd) then
1694	>	FAfterTransactionEnd(Sender);
1695	>	end;
1696	>
1697	>	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1698	>	begin
1699	>	if Assigned(FTransactionFree) then
1700	>	FTransactionFree(Sender);
1701	>	end;
1702	>
1703	>	{ Read the record from FQSelect.Current into the record buffer
1704	>	Then write the buffer to in memory cache }
1705	>	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
1706	>	RecordNumber: Integer; Buffer: PChar);
1707	>	var
1708	>	p: PRecordData;
1709	>	pbd: PBlobDataArray;
1710	>	i, j: Integer;
1711	>	LocalData: Pointer;
1712	>	LocalDate, LocalDouble: Double;
1713	>	LocalInt: Integer;
1714	>	LocalBool: wordBool;
1715	>	LocalInt64: Int64;
1716	>	LocalCurrency: Currency;
1717	>	FieldsLoaded: Integer;
1718	>	begin
1719	>	p := PRecordData(Buffer);
1720	>	{ Make sure blob cache is empty }
1721	>	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
1722	>	if RecordNumber > -1 then
1723	>	for i := 0 to BlobFieldCount - 1 do
1724	>	pbd^[i] := nil;
1725	>	{ Get record information }
1726	>	p^.rdBookmarkFlag := bfCurrent;
1727	>	p^.rdFieldCount := Qry.Current.Count;
1728	>	p^.rdRecordNumber := RecordNumber;
1729	>	p^.rdUpdateStatus := usUnmodified;
1730	>	p^.rdCachedUpdateStatus := cusUnmodified;
1731	>	p^.rdSavedOffset := $FFFFFFFF;
1732	>
1733	>	{ Load up the fields }
1734	>	FieldsLoaded := FQSelect.Current.Count;
1735	>	j := 1;
1736	>	for i := 0 to Qry.Current.Count - 1 do
1737	>	begin
1738	>	if (Qry = FQSelect) then
1739	>	j := i + 1
1740	>	else begin
1741	>	if FieldsLoaded = 0 then
1742	>	break;
1743	>	j := FQSelect.FieldIndex[Qry.Current[i].Name] + 1;
1744	>	if j < 1 then
1745	>	continue
1746	>	else
1747	>	Dec(FieldsLoaded);
1748	>	end;
1749	>	with FQSelect.Current[j - 1].Data^ do
1750	>	if aliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
1751	>	begin
1752	>	if sqllen <= 8 then
1753	>	p^.rdDBKey := PIBDBKEY(Qry.Current[i].AsPointer)^;
1754	>	continue;
1755	>	end;
1756	>	if j > 0 then with p^ do
1757	>	begin
1758	>	rdFields[j].fdDataType :=
1759	>	Qry.Current[i].Data^.sqltype and (not 1);
1760	>	rdFields[j].fdDataScale :=
1761	>	Qry.Current[i].Data^.sqlscale;
1762	>	rdFields[j].fdNullable :=
1763	>	(Qry.Current[i].Data^.sqltype and 1 = 1);
1764	>	rdFields[j].fdIsNull :=
1765	>	(rdFields[j].fdNullable and (Qry.Current[i].Data^.sqlind^ = -1));
1766	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1767	>	rdFields[j].fdCodePage := 0;
1768	>	{$ENDIF}
1769	>	LocalData := Qry.Current[i].Data^.sqldata;
1770	>	case rdFields[j].fdDataType of
1771	>	SQL_TIMESTAMP:
1772	>	begin
1773	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1774	>	if RecordNumber >= 0 then
1775	>	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(Qry.Current[i].AsDateTime));
1776	>	LocalData := PChar(@LocalDate);
1777	>	end;
1778	>	SQL_TYPE_DATE:
1779	>	begin
1780	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1781	>	if RecordNumber >= 0 then
1782	>	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Date;
1783	>	LocalData := PChar(@LocalInt);
1784	>	end;
1785	>	SQL_TYPE_TIME:
1786	>	begin
1787	>	rdFields[j].fdDataSize := SizeOf(TDateTime);
1788	>	if RecordNumber >= 0 then
1789	>	LocalInt := DateTimeToTimeStamp(Qry.Current[i].AsDateTime).Time;
1790	>	LocalData := PChar(@LocalInt);
1791	>	end;
1792	>	SQL_SHORT, SQL_LONG:
1793	>	begin
1794	>	if (rdFields[j].fdDataScale = 0) then
1795	>	begin
1796	>	rdFields[j].fdDataSize := SizeOf(Integer);
1797	>	if RecordNumber >= 0 then
1798	>	LocalInt := Qry.Current[i].AsLong;
1799	>	LocalData := PChar(@LocalInt);
1800	>	end
1801	>	else if (rdFields[j].fdDataScale >= (-4)) then
1802	>	begin
1803	>	rdFields[j].fdDataSize := SizeOf(Currency);
1804	>	if RecordNumber >= 0 then
1805	>	LocalCurrency := Qry.Current[i].AsCurrency;
1806	>	LocalData := PChar(@LocalCurrency);
1807	>	end
1808	>	else begin
1809	>	rdFields[j].fdDataSize := SizeOf(Double);
1810	>	if RecordNumber >= 0 then
1811	>	LocalDouble := Qry.Current[i].AsDouble;
1812	>	LocalData := PChar(@LocalDouble);
1813	>	end;
1814	>	end;
1815	>	SQL_INT64:
1816	>	begin
1817	>	if (rdFields[j].fdDataScale = 0) then
1818	>	begin
1819	>	rdFields[j].fdDataSize := SizeOf(Int64);
1820	>	if RecordNumber >= 0 then
1821	>	LocalInt64 := Qry.Current[i].AsInt64;
1822	>	LocalData := PChar(@LocalInt64);
1823	>	end
1824	>	else if (rdFields[j].fdDataScale >= (-4)) then
1825	>	begin
1826	>	rdFields[j].fdDataSize := SizeOf(Currency);
1827	>	if RecordNumber >= 0 then
1828	>	LocalCurrency := Qry.Current[i].AsCurrency;
1829	>	LocalData := PChar(@LocalCurrency);
1830	>	end
1831	>	else begin
1832	>	rdFields[j].fdDataSize := SizeOf(Double);
1833	>	if RecordNumber >= 0 then
1834	>	LocalDouble := Qry.Current[i].AsDouble;
1835	>	LocalData := PChar(@LocalDouble);
1836	>	end
1837	>	end;
1838	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
1839	>	begin
1840	>	rdFields[j].fdDataSize := SizeOf(Double);
1841	>	if RecordNumber >= 0 then
1842	>	LocalDouble := Qry.Current[i].AsDouble;
1843	>	LocalData := PChar(@LocalDouble);
1844	>	end;
1845	>	SQL_VARYING:
1846	>	begin
1847	>	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1848	>	rdFields[j].fdDataLength := isc_vax_integer(Qry.Current[i].Data^.sqldata, 2);
1849	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1850	>	TFirebirdCharacterSets.CharSetID2CodePage(Qry.Current[i].Data^.sqlsubtype and $FF,
1851	>	rdFields[j].fdCodePage);
1852	>	{$ENDIF}
1853	>	if RecordNumber >= 0 then
1854	>	begin
1855	>	if (rdFields[j].fdDataLength = 0) then
1856	>	LocalData := nil
1857	>	else
1858	>	Inc(LocalData,2);
1859	>	end;
1860	>	end;
1861	>	SQL_BOOLEAN:
1862	>	begin
1863	>	LocalBool:= false;
1864	>	rdFields[j].fdDataSize := SizeOf(wordBool);
1865	>	if RecordNumber >= 0 then
1866	>	LocalBool := Qry.Current[i].AsBoolean;
1867	>	LocalData := PChar(@LocalBool);
1868	>	end;
1869	>	SQL_TEXT:
1870	>	begin
1871	>	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1872	>	rdFields[j].fdDataLength := rdFields[j].fdDataSize;
1873	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
1874	>	TFirebirdCharacterSets.CharSetID2CodePage(Qry.Current[i].Data^.sqlsubtype and $FF,
1875	>	rdFields[j].fdCodePage);
1876	>	{$ENDIF}
1877	>	end;
1878	>	else {  SQL_BLOB, SQL_ARRAY, SQL_QUAD }
1879	>	begin
1880	>	rdFields[j].fdDataSize := Qry.Current[i].Data^.sqllen;
1881	>	end;
1882	>	end;
1883	>	if RecordNumber < 0 then
1884	>	begin
1885	>	rdFields[j].fdIsNull := True;
1886	>	rdFields[j].fdDataOfs := FRecordSize;
1887	>	Inc(FRecordSize, rdFields[j].fdDataSize);
1888	>	end
1889	>	else begin
1890	>	if rdFields[j].fdDataType = SQL_VARYING then
1891	>	begin
1892	>	if LocalData <> nil then
1893	>	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataLength)
1894	>	end
1895	>	else
1896	>	Move(LocalData^, Buffer[rdFields[j].fdDataOfs], rdFields[j].fdDataSize)
1897	>	end;
1898	>	end;
1899	>	end;
1900	>	WriteRecordCache(RecordNumber, PChar(p));
1901	>	end;
1902	>
1903	>	function TIBCustomDataSet.GetActiveBuf: PChar;
1904	>	begin
1905	>	case State of
1906	>	dsBrowse:
1907	>	if IsEmpty then
1908	>	result := nil
1909	>	else
1910	>	result := ActiveBuffer;
1911	>	dsEdit, dsInsert:
1912	>	result := ActiveBuffer;
1913	>	dsCalcFields:
1914	>	result := CalcBuffer;
1915	>	dsFilter:
1916	>	result := FFilterBuffer;
1917	>	dsNewValue:
1918	>	result := ActiveBuffer;
1919	>	dsOldValue:
1920	>	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
1921	>	PRecordData(FOldBuffer)^.rdRecordNumber) then
1922	>	result := FOldBuffer
1923	>	else
1924	>	result := ActiveBuffer;
1925	>	else if not FOpen then
1926	>	result := nil
1927	>	else
1928	>	result := ActiveBuffer;
1929	>	end;
1930	>	end;
1931	>
1932	>	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
1933	>	begin
1934	>	if Active then
1935	>	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
1936	>	else
1937	>	result := cusUnmodified;
1938	>	end;
1939	>
1940	>	function TIBCustomDataSet.GetDatabase: TIBDatabase;
1941	>	begin
1942	>	result := FBase.Database;
1943	>	end;
1944	>
1945	>	function TIBCustomDataSet.GetDBHandle: PISC_DB_HANDLE;
1946	>	begin
1947	>	result := FBase.DBHandle;
1948	>	end;
1949	>
1950	>	function TIBCustomDataSet.GetDeleteSQL: TStrings;
1951	>	begin
1952	>	result := FQDelete.SQL;
1953	>	end;
1954	>
1955	>	function TIBCustomDataSet.GetInsertSQL: TStrings;
1956	>	begin
1957	>	result := FQInsert.SQL;
1958	>	end;
1959	>
1960	>	function TIBCustomDataSet.GetSQLParams: TIBXSQLDA;
1961	>	begin
1962	>	if not FInternalPrepared then
1963	>	InternalPrepare;
1964	>	result := FQSelect.Params;
1965	>	end;
1966	>
1967	>	function TIBCustomDataSet.GetRefreshSQL: TStrings;
1968	>	begin
1969	>	result := FQRefresh.SQL;
1970	>	end;
1971	>
1972	>	function TIBCustomDataSet.GetSelectSQL: TStrings;
1973	>	begin
1974	>	result := FQSelect.SQL;
1975	>	end;
1976	>
1977	>	function TIBCustomDataSet.GetStatementType: TIBSQLTypes;
1978	>	begin
1979	>	result := FQSelect.SQLType;
1980	>	end;
1981	>
1982	>	function TIBCustomDataSet.GetModifySQL: TStrings;
1983	>	begin
1984	>	result := FQModify.SQL;
1985	>	end;
1986	>
1987	>	function TIBCustomDataSet.GetTransaction: TIBTransaction;
1988	>	begin
1989	>	result := FBase.Transaction;
1990	>	end;
1991	>
1992	>	function TIBCustomDataSet.GetTRHandle: PISC_TR_HANDLE;
1993	>	begin
1994	>	result := FBase.TRHandle;
1995	>	end;
1996	>
1997	>	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
1998	>	begin
1999	>	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
2000	>	FUpdateObject.Apply(ukDelete,Buff)
2001	>	else
2002	>	begin
2003	>	SetInternalSQLParams(FQDelete, Buff);
2004	>	FQDelete.ExecQuery;
2005	>	end;
2006	>	with PRecordData(Buff)^ do
2007	>	begin
2008	>	rdUpdateStatus := usDeleted;
2009	>	rdCachedUpdateStatus := cusUnmodified;
2010	>	end;
2011	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2012	>	end;
2013	>
2014	>	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
2015	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
2016	>	var
2017	>	keyFieldList: TList;
2018	>	{$IFDEF NEW_TBOOKMARK }
2019	>	CurBookmark: TBookmark;
2020	>	{$ELSE}
2021	>	CurBookmark: string;
2022	>	{$ENDIF}
2023	>	fieldValue: Variant;
2024	>	lookupValues: array of variant;
2025	>	i, fieldCount: Integer;
2026	>	fieldValueAsString: string;
2027	>	lookupValueAsString: string;
2028	>	begin
2029	>	keyFieldList := TList.Create;
2030	>	try
2031	>	GetFieldList(keyFieldList, KeyFields);
2032	>	fieldCount := keyFieldList.Count;
2033	>	CurBookmark := Bookmark;
2034	>	result := false;
2035	>	SetLength(lookupValues, fieldCount);
2036	>	if not EOF then
2037	>	begin
2038	>	for i := 0 to fieldCount - 1 do  {expand key values into lookupValues array}
2039	>	begin
2040	>	if VarIsArray(KeyValues) then
2041	>	lookupValues[i] := KeyValues[i]
2042	>	else
2043	>	if i > 0 then
2044	>	lookupValues[i] := NULL
2045	>	else
2046	>	lookupValues[0] := KeyValues;
2047	>
2048	>	{convert to upper case is case insensitive search}
2049	>	if (TField(keyFieldList[i]).DataType = ftString) and
2050	>	not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
2051	>	lookupValues[i] := UpperCase(lookupValues[i]);
2052	>	end;
2053	>	end;
2054	>	while not result and not EOF do   {search for a matching record}
2055	>	begin
2056	>	i := 0;
2057	>	result := true;
2058	>	while result and (i < fieldCount) do
2059	>	{see if all of the key fields matches}
2060	>	begin
2061	>	fieldValue := TField(keyFieldList[i]).Value;
2062	>	result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
2063	>	if result and not VarIsNull(fieldValue) then
2064	>	begin
2065	>	try
2066	>	if TField(keyFieldList[i]).DataType = ftString then
2067	>	begin
2068	>	{strings need special handling because of the locate options that
2069	>	apply to them}
2070	>	fieldValueAsString := TField(keyFieldList[i]).AsString;
2071	>	lookupValueAsString := lookupValues[i];
2072	>	if (loCaseInsensitive in Options) then
2073	>	fieldValueAsString := UpperCase(fieldValueAsString);
2074	>
2075	>	if (loPartialKey in Options) then
2076	>	result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
2077	>	else
2078	>	result := result and (fieldValueAsString = lookupValueAsString);
2079	>	end
2080	>	else
2081	>	result := result and (lookupValues[i] =
2082	>	VarAsType(fieldValue, VarType(lookupValues[i])));
2083	>	except on EVariantError do
2084	>	result := False;
2085	>	end;
2086	>	end;
2087	>	Inc(i);
2088	>	end;
2089	>	if not result then
2090	>	Next;
2091	>	end;
2092	>	if not result then
2093	>	Bookmark := CurBookmark
2094	>	else
2095	>	CursorPosChanged;
2096	>	finally
2097	>	keyFieldList.Free;
2098	>	SetLength(lookupValues,0)
2099	>	end;
2100	>	end;
2101	>
2102	>	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
2103	>	var
2104	>	i, j, k: Integer;
2105	>	pbd: PBlobDataArray;
2106	>	begin
2107	>	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
2108	>	j := 0;
2109	>	for i := 0 to FieldCount - 1 do
2110	>	if Fields[i].IsBlob then
2111	>	begin
2112	>	k := FMappedFieldPosition[Fields[i].FieldNo -1];
2113	>	if pbd^[j] <> nil then
2114	>	begin
2115	>	pbd^[j].Finalize;
2116	>	PISC_QUAD(
2117	>	PChar(Buff) + PRecordData(Buff)^.rdFields[k].fdDataOfs)^ :=
2118	>	pbd^[j].BlobID;
2119	>	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
2120	>	end;
2121	>	Inc(j);
2122	>	end;
2123	>	if Assigned(FUpdateObject) then
2124	>	begin
2125	>	if (Qry = FQDelete) then
2126	>	FUpdateObject.Apply(ukDelete,Buff)
2127	>	else if (Qry = FQInsert) then
2128	>	FUpdateObject.Apply(ukInsert,Buff)
2129	>	else
2130	>	FUpdateObject.Apply(ukModify,Buff);
2131	>	end
2132	>	else begin
2133	>	SetInternalSQLParams(Qry, Buff);
2134	>	Qry.ExecQuery;
2135	>	end;
2136	>	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
2137	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2138	>	SetModified(False);
2139	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2140	>	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
2141	>	InternalRefreshRow;
2142	>	end;
2143	>
2144	>	procedure TIBCustomDataSet.InternalRefreshRow;
2145	>	var
2146	>	Buff: PChar;
2147	>	ofs: DWORD;
2148	>	Qry: TIBSQL;
2149	>	begin
2150	>	FBase.SetCursor;
2151	>	try
2152	>	Buff := GetActiveBuf;
2153	>	if CanRefresh then
2154	>	begin
2155	>	if Buff <> nil then
2156	>	begin
2157	>	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
2158	>	begin
2159	>	Qry := TIBSQL.Create(self);
2160	>	Qry.Database := Database;
2161	>	Qry.Transaction := Transaction;
2162	>	Qry.GoToFirstRecordOnExecute := False;
2163	>	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
2164	>	end
2165	>	else
2166	>	Qry := FQRefresh;
2167	>	SetInternalSQLParams(Qry, Buff);
2168	>	Qry.ExecQuery;
2169	>	try
2170	>	if (Qry.SQLType = SQLExecProcedure) or
2171	>	(Qry.Next <> nil) then
2172	>	begin
2173	>	ofs := PRecordData(Buff)^.rdSavedOffset;
2174	>	FetchCurrentRecordToBuffer(Qry,
2175	>	PRecordData(Buff)^.rdRecordNumber,
2176	>	Buff);
2177	>	if FCachedUpdates and (ofs <> $FFFFFFFF) then
2178	>	begin
2179	>	PRecordData(Buff)^.rdSavedOffset := ofs;
2180	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2181	>	SaveOldBuffer(Buff);
2182	>	end;
2183	>	end;
2184	>	finally
2185	>	Qry.Close;
2186	>	end;
2187	>	if Qry <> FQRefresh then
2188	>	Qry.Free;
2189	>	end
2190	>	end
2191	>	else
2192	>	IBError(ibxeCannotRefresh, [nil]);
2193	>	finally
2194	>	FBase.RestoreCursor;
2195	>	end;
2196	>	end;
2197	>
2198	>	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
2199	>	var
2200	>	NewBuffer, OldBuffer: PRecordData;
2201	>
2202	>	begin
2203	>	NewBuffer := nil;
2204	>	OldBuffer := nil;
2205	>	NewBuffer := PRecordData(AllocRecordBuffer);
2206	>	OldBuffer := PRecordData(AllocRecordBuffer);
2207	>	try
2208	>	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
2209	>	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
2210	>	case NewBuffer^.rdCachedUpdateStatus of
2211	>	cusInserted:
2212	>	begin
2213	>	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
2214	>	Inc(FDeletedRecords);
2215	>	end;
2216	>	cusModified,
2217	>	cusDeleted:
2218	>	begin
2219	>	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
2220	>	Dec(FDeletedRecords);
2221	>	CopyRecordBuffer(OldBuffer, NewBuffer);
2222	>	end;
2223	>	end;
2224	>
2225	>	if State in dsEditModes then
2226	>	Cancel;
2227	>
2228	>	WriteRecordCache(RecordNumber, PChar(NewBuffer));
2229	>
2230	>	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
2231	>	ReSync([]);
2232	>	finally
2233	>	FreeRecordBuffer(PChar(NewBuffer));
2234	>	FreeRecordBuffer(PChar(OldBuffer));
2235	>	end;
2236	>	end;
2237	>
2238	>	{ A visible record is one that is not truly deleted,
2239	>	and it is also listed in the FUpdateRecordTypes set }
2240	>
2241	>	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
2242	>	begin
2243	>	result := True;
2244	>	if not (State = dsOldValue) then
2245	>	result :=
2246	>	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
2247	>	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
2248	>	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
2249	>	end;
2250	>
2251	>
2252	>	function TIBCustomDataSet.LocateNext(const KeyFields: string;
2253	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
2254	>	begin
2255	>	DisableControls;
2256	>	try
2257	>	result := InternalLocate(KeyFields, KeyValues, Options);
2258	>	finally
2259	>	EnableControls;
2260	>	end;
2261	>	end;
2262	>
2263	>	procedure TIBCustomDataSet.InternalPrepare;
2264	>	var
2265	>	DidActivate: Boolean;
2266	>	begin
2267	>	if FInternalPrepared then
2268	>	Exit;
2269	>	DidActivate := False;
2270	>	FBase.SetCursor;
2271	>	try
2272	>	ActivateConnection;
2273	>	DidActivate := ActivateTransaction;
2274	>	FBase.CheckDatabase;
2275	>	FBase.CheckTransaction;
2276	>	if HasParser and (FParser.SQLText <> FQSelect.SQL.Text) then
2277	>	begin
2278	>	FQSelect.OnSQLChanged := nil; {Do not react to change}
2279	>	try
2280	>	FQSelect.SQL.Text := FParser.SQLText;
2281	>	finally
2282	>	FQSelect.OnSQLChanged := SQLChanged;
2283	>	end;
2284	>	end;
2285	>	//   writeln( FQSelect.SQL.Text);
2286	>	if FQSelect.SQL.Text <> '' then
2287	>	begin
2288	>	if not FQSelect.Prepared then
2289	>	begin
2290	>	FQSelect.GenerateParamNames := FGenerateParamNames;
2291	>	FQSelect.ParamCheck := ParamCheck;
2292	>	FQSelect.Prepare;
2293	>	end;
2294	>	FQDelete.GenerateParamNames := FGenerateParamNames;
2295	>	if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
2296	>	FQDelete.Prepare;
2297	>	FQInsert.GenerateParamNames := FGenerateParamNames;
2298	>	if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
2299	>	FQInsert.Prepare;
2300	>	FQRefresh.GenerateParamNames := FGenerateParamNames;
2301	>	if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
2302	>	FQRefresh.Prepare;
2303	>	FQModify.GenerateParamNames := FGenerateParamNames;
2304	>	if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
2305	>	FQModify.Prepare;
2306	>	FInternalPrepared := True;
2307	>	InternalInitFieldDefs;
2308	>	end else
2309	>	IBError(ibxeEmptyQuery, [nil]);
2310	>	finally
2311	>	if DidActivate then
2312	>	DeactivateTransaction;
2313	>	FBase.RestoreCursor;
2314	>	end;
2315	>	end;
2316	>
2317	>	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
2318	>	begin
2319	>	SetModified(Value);
2320	>	end;
2321	>
2322	>	procedure TIBCustomDataSet.RevertRecord;
2323	>	var
2324	>	Buff: PRecordData;
2325	>	begin
2326	>	if FCachedUpdates and FUpdatesPending then
2327	>	begin
2328	>	Buff := PRecordData(GetActiveBuf);
2329	>	InternalRevertRecord(Buff^.rdRecordNumber);
2330	>	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
2331	>	DataEvent(deRecordChange, 0);
2332	>	end;
2333	>	end;
2334	>
2335	>	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
2336	>	var
2337	>	OldBuffer: Pointer;
2338	>	procedure CopyOldBuffer;
2339	>	begin
2340	>	CopyRecordBuffer(Buffer, OldBuffer);
2341	>	if BlobFieldCount > 0 then
2342	>	FillChar(PChar(OldBuffer)[FBlobCacheOffset], BlobFieldCount * SizeOf(TIBBlobStream),
2343	>	0);
2344	>	end;
2345	>
2346	>	begin
2347	>	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
2348	>	begin
2349	>	OldBuffer := AllocRecordBuffer;
2350	>	try
2351	>	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
2352	>	begin
2353	>	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
2354	>	FILE_END);
2355	>	CopyOldBuffer;
2356	>	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
2357	>	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
2358	>	FILE_BEGIN, Buffer);
2359	>	end
2360	>	else begin
2361	>	CopyOldBuffer;
2362	>	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2363	>	OldBuffer);
2364	>	end;
2365	>	finally
2366	>	FreeRecordBuffer(PChar(OldBuffer));
2367	>	end;
2368	>	end;
2369	>	end;
2370	>
2371	>	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
2372	>	begin
2373	>	if (Value <= 0) then
2374	>	FBufferChunks := BufferCacheSize
2375	>	else
2376	>	FBufferChunks := Value;
2377	>	end;
2378	>
2379	>	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
2380	>	begin
2381	>	if (FBase.Database <> Value) then
2382	>	begin
2383	>	CheckDatasetClosed;
2384	>	FBase.Database := Value;
2385	>	FQDelete.Database := Value;
2386	>	FQInsert.Database := Value;
2387	>	FQRefresh.Database := Value;
2388	>	FQSelect.Database := Value;
2389	>	FQModify.Database := Value;
2390	>	end;
2391	>	end;
2392	>
2393	>	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
2394	>	begin
2395	>	if FQDelete.SQL.Text <> Value.Text then
2396	>	begin
2397	>	Disconnect;
2398	>	FQDelete.SQL.Assign(Value);
2399	>	end;
2400	>	end;
2401	>
2402	>	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
2403	>	begin
2404	>	if FQInsert.SQL.Text <> Value.Text then
2405	>	begin
2406	>	Disconnect;
2407	>	FQInsert.SQL.Assign(Value);
2408	>	end;
2409	>	end;
2410	>
2411	>	procedure TIBCustomDataSet.SetInternalSQLParams(Qry: TIBSQL; Buffer: Pointer);
2412	>	var
2413	>	i, j: Integer;
2414	>	cr, data: PChar;
2415	>	fn: string;
2416	>	st: RawByteString;
2417	>	OldBuffer: Pointer;
2418	>	ts: TTimeStamp;
2419	>	begin
2420	>	if (Buffer = nil) then
2421	>	IBError(ibxeBufferNotSet, [nil]);
2422	>	if (not FInternalPrepared) then
2423	>	InternalPrepare;
2424	>	OldBuffer := nil;
2425	>	try
2426	>	for i := 0 to Qry.Params.Count - 1 do
2427	>	begin
2428	>	fn := Qry.Params[i].Name;
2429	>	if (Pos('OLD_', fn) = 1) then {mbcs ok}
2430	>	begin
2431	>	fn := Copy(fn, 5, Length(fn));
2432	>	if not Assigned(OldBuffer) then
2433	>	begin
2434	>	OldBuffer := AllocRecordBuffer;
2435	>	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
2436	>	end;
2437	>	cr := OldBuffer;
2438	>	end
2439	>	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
2440	>	begin
2441	>	fn := Copy(fn, 5, Length(fn));
2442	>	cr := Buffer;
2443	>	end
2444	>	else
2445	>	cr := Buffer;
2446	>	j := FQSelect.FieldIndex[fn] + 1;
2447	>	if (j > 0) then
2448	>	with PRecordData(cr)^ do
2449	>	begin
2450	>	if Qry.Params[i].name = 'IBX_INTERNAL_DBKEY' then {do not localize}
2451	>	begin
2452	>	PIBDBKey(Qry.Params[i].AsPointer)^ := rdDBKey;
2453	>	continue;
2454	>	end;
2455	>	if rdFields[j].fdIsNull then
2456	>	Qry.Params[i].IsNull := True
2457	>	else begin
2458	>	Qry.Params[i].IsNull := False;
2459	>	data := cr + rdFields[j].fdDataOfs;
2460	>	case rdFields[j].fdDataType of
2461	>	SQL_TEXT, SQL_VARYING:
2462	>	begin
2463	>	SetString(st, data, rdFields[j].fdDataLength);
2464	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
2465	>	SetCodePage(st,rdFields[j].fdCodePage,false);
2466	>	{$ENDIF}
2467	>	Qry.Params[i].AsString := st;
2468	>	end;
2469	>	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
2470	>	Qry.Params[i].AsDouble := PDouble(data)^;
2471	>	SQL_SHORT, SQL_LONG:
2472	>	begin
2473	>	if rdFields[j].fdDataScale = 0 then
2474	>	Qry.Params[i].AsLong := PLong(data)^
2475	>	else if rdFields[j].fdDataScale >= (-4) then
2476	>	Qry.Params[i].AsCurrency := PCurrency(data)^
2477	>	else
2478	>	Qry.Params[i].AsDouble := PDouble(data)^;
2479	>	end;
2480	>	SQL_INT64:
2481	>	begin
2482	>	if rdFields[j].fdDataScale = 0 then
2483	>	Qry.Params[i].AsInt64 := PInt64(data)^
2484	>	else if rdFields[j].fdDataScale >= (-4) then
2485	>	Qry.Params[i].AsCurrency := PCurrency(data)^
2486	>	else
2487	>	Qry.Params[i].AsDouble := PDouble(data)^;
2488	>	end;
2489	>	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
2490	>	Qry.Params[i].AsQuad := PISC_QUAD(data)^;
2491	>	SQL_TYPE_DATE:
2492	>	begin
2493	>	ts.Date := PInt(data)^;
2494	>	ts.Time := 0;
2495	>	Qry.Params[i].AsDate :=
2496	>	TimeStampToDateTime(ts);
2497	>	end;
2498	>	SQL_TYPE_TIME:
2499	>	begin
2500	>	ts.Date := 0;
2501	>	ts.Time := PInt(data)^;
2502	>	Qry.Params[i].AsTime :=
2503	>	TimeStampToDateTime(ts);
2504	>	end;
2505	>	SQL_TIMESTAMP:
2506	>	Qry.Params[i].AsDateTime :=
2507	>	TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^)));
2508	>	SQL_BOOLEAN:
2509	>	Qry.Params[i].AsBoolean := PWordBool(data)^;
2510	>	end;
2511	>	end;
2512	>	end;
2513	>	end;
2514	>	finally
2515	>	if (OldBuffer <> nil) then
2516	>	FreeRecordBuffer(PChar(OldBuffer));
2517	>	end;
2518	>	end;
2519	>
2520	>	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2521	>	begin
2522	>	if FQRefresh.SQL.Text <> Value.Text then
2523	>	begin
2524	>	Disconnect;
2525	>	FQRefresh.SQL.Assign(Value);
2526	>	end;
2527	>	end;
2528	>
2529	>	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2530	>	begin
2531	>	if FQSelect.SQL.Text <> Value.Text then
2532	>	begin
2533	>	Disconnect;
2534	>	FQSelect.SQL.Assign(Value);
2535	>	end;
2536	>	end;
2537	>
2538	>	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2539	>	begin
2540	>	if FQModify.SQL.Text <> Value.Text then
2541	>	begin
2542	>	Disconnect;
2543	>	FQModify.SQL.Assign(Value);
2544	>	end;
2545	>	end;
2546	>
2547	>	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2548	>	begin
2549	>	if (FBase.Transaction <> Value) then
2550	>	begin
2551	>	CheckDatasetClosed;
2552	>	FBase.Transaction := Value;
2553	>	FQDelete.Transaction := Value;
2554	>	FQInsert.Transaction := Value;
2555	>	FQRefresh.Transaction := Value;
2556	>	FQSelect.Transaction := Value;
2557	>	FQModify.Transaction := Value;
2558	>	end;
2559	>	end;
2560	>
2561	>	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2562	>	begin
2563	>	CheckDatasetClosed;
2564	>	FUniDirectional := Value;
2565	>	end;
2566	>
2567	>	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2568	>	begin
2569	>	FUpdateRecordTypes := Value;
2570	>	if Active then
2571	>	First;
2572	>	end;
2573	>
2574	>	procedure TIBCustomDataSet.RefreshParams;
2575	>	var
2576	>	DataSet: TDataSet;
2577	>	begin
2578	>	DisableControls;
2579	>	try
2580	>	if FDataLink.DataSource <> nil then
2581	>	begin
2582	>	DataSet := FDataLink.DataSource.DataSet;
2583	>	if DataSet <> nil then
2584	>	if DataSet.Active and (DataSet.State <> dsSetKey) then
2585	>	begin
2586	>	Close;
2587	>	Open;
2588	>	end;
2589	>	end;
2590	>	finally
2591	>	EnableControls;
2592	>	end;
2593	>	end;
2594	>
2595	>	procedure TIBCustomDataSet.RegisterIBLink(Sender: TIBControlLink);
2596	>	begin
2597	>	if FIBLinks.IndexOf(Sender) = -1 then
2598	>	FIBLinks.Add(Sender);
2599	>	end;
2600	>
2601	>
2602	>	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2603	>	begin
2604	>	Active := false;
2605	>	{  if FOpen then
2606	>	InternalClose;}
2607	>	if FInternalPrepared then
2608	>	InternalUnPrepare;
2609	>	FieldDefs.Clear;
2610	>	FieldDefs.Updated := false;
2611	>	end;
2612	>
2613	>	procedure TIBCustomDataSet.SQLChanged(Sender: TObject);
2614	>	begin
2615	>	FBaseSQLSelect.assign(FQSelect.SQL);
2616	>	end;
2617	>
2618	>	{ I can "undelete" uninserted records (make them "inserted" again).
2619	>	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2620	>	procedure TIBCustomDataSet.Undelete;
2621	>	var
2622	>	Buff: PRecordData;
2623	>	begin
2624	>	CheckActive;
2625	>	Buff := PRecordData(GetActiveBuf);
2626	>	with Buff^ do
2627	>	begin
2628	>	if rdCachedUpdateStatus = cusUninserted then
2629	>	begin
2630	>	rdCachedUpdateStatus := cusInserted;
2631	>	Dec(FDeletedRecords);
2632	>	end
2633	>	else if (rdUpdateStatus = usDeleted) and
2634	>	(rdCachedUpdateStatus = cusDeleted) then
2635	>	begin
2636	>	rdCachedUpdateStatus := cusUnmodified;
2637	>	rdUpdateStatus := usUnmodified;
2638	>	Dec(FDeletedRecords);
2639	>	end;
2640	>	WriteRecordCache(rdRecordNumber, PChar(Buff));
2641	>	end;
2642	>	end;
2643	>
2644	>	procedure TIBCustomDataSet.UnRegisterIBLink(Sender: TIBControlLink);
2645	>	begin
2646	>	FIBLinks.Remove(Sender);
2647	>	end;
2648	>
2649	>	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2650	>	begin
2651	>	if Active then
2652	>	if GetActiveBuf <> nil then
2653	>	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2654	>	else
2655	>	result := usUnmodified
2656	>	else
2657	>	result := usUnmodified;
2658	>	end;
2659	>
2660	>	function TIBCustomDataSet.IsSequenced: Boolean;
2661	>	begin
2662	>	Result := Assigned( FQSelect ) and FQSelect.EOF;
2663	>	end;
2664	>
2665	>	function TIBCustomDataSet.ParamByName(ParamName: String): TIBXSQLVAR;
2666	>	begin
2667	>	ActivateConnection;
2668	>	ActivateTransaction;
2669	>	if not FInternalPrepared then
2670	>	InternalPrepare;
2671	>	Result := Params.ByName(ParamName);
2672	>	end;
2673	>
2674	>	{Beware: the parameter FCache is used as an identifier to determine which
2675	>	cache is being operated on and is not referenced in the computation.
2676	>	The result is an adjusted offset into the identified cache, either the
2677	>	Buffer Cache or the old Buffer Cache.}
2678	>
2679	>	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
2680	>	Origin: Integer): DWORD;
2681	>	var
2682	>	OldCacheSize: Integer;
2683	>	begin
2684	>	if (FCache = FBufferCache) then
2685	>	begin
2686	>	case Origin of
2687	>	FILE_BEGIN:    FBPos := Offset;
2688	>	FILE_CURRENT:  FBPos := FBPos + Offset;
2689	>	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
2690	>	end;
2691	>	OldCacheSize := FCacheSize;
2692	>	while (FBPos >= DWORD(FCacheSize)) do
2693	>	Inc(FCacheSize, FBufferChunkSize);
2694	>	if FCacheSize > OldCacheSize then
2695	>	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
2696	>	result := FBPos;
2697	>	end
2698	>	else begin
2699	>	case Origin of
2700	>	FILE_BEGIN:    FOBPos := Offset;
2701	>	FILE_CURRENT:  FOBPos := FOBPos + Offset;
2702	>	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
2703	>	end;
2704	>	OldCacheSize := FOldCacheSize;
2705	>	while (FBPos >= DWORD(FOldCacheSize)) do
2706	>	Inc(FOldCacheSize, FBufferChunkSize);
2707	>	if FOldCacheSize > OldCacheSize then
2708	>	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
2709	>	result := FOBPos;
2710	>	end;
2711	>	end;
2712	>
2713	>	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2714	>	Buffer: PChar);
2715	>	var
2716	>	pCache: PChar;
2717	>	AdjustedOffset: DWORD;
2718	>	bOld: Boolean;
2719	>	begin
2720	>	bOld := (FCache = FOldBufferCache);
2721	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2722	>	if not bOld then
2723	>	pCache := FBufferCache + AdjustedOffset
2724	>	else
2725	>	pCache := FOldBufferCache + AdjustedOffset;
2726	>	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
2727	>	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2728	>	end;
2729	>
2730	>	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
2731	>	ReadOldBuffer: Boolean);
2732	>	begin
2733	>	if FUniDirectional then
2734	>	RecordNumber := RecordNumber mod UniCache;
2735	>	if (ReadOldBuffer) then
2736	>	begin
2737	>	ReadRecordCache(RecordNumber, Buffer, False);
2738	>	if FCachedUpdates and
2739	>	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
2740	>	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2741	>	Buffer)
2742	>	else
2743	>	if ReadOldBuffer and
2744	>	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
2745	>	CopyRecordBuffer( FOldBuffer, Buffer )
2746	>	end
2747	>	else
2748	>	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2749	>	end;
2750	>
2751	>	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
2752	>	Buffer: PChar);
2753	>	var
2754	>	pCache: PChar;
2755	>	AdjustedOffset: DWORD;
2756	>	bOld: Boolean;
2757	>	dwEnd: DWORD;
2758	>	begin
2759	>	bOld := (FCache = FOldBufferCache);
2760	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
2761	>	if not bOld then
2762	>	pCache := FBufferCache + AdjustedOffset
2763	>	else
2764	>	pCache := FOldBufferCache + AdjustedOffset;
2765	>	Move(Buffer^, pCache^, FRecordBufferSize);
2766	>	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
2767	>	if not bOld then
2768	>	begin
2769	>	if (dwEnd > FBEnd) then
2770	>	FBEnd := dwEnd;
2771	>	end
2772	>	else begin
2773	>	if (dwEnd > FOBEnd) then
2774	>	FOBEnd := dwEnd;
2775	>	end;
2776	>	end;
2777	>
2778	>	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
2779	>	begin
2780	>	if RecordNumber >= 0 then
2781	>	begin
2782	>	if FUniDirectional then
2783	>	RecordNumber := RecordNumber mod UniCache;
2784	>	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
2785	>	end;
2786	>	end;
2787	>
2788	>	function TIBCustomDataSet.AllocRecordBuffer: PChar;
2789	>	begin
2790	>	result := nil;
2791	>	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
2792	>	Move(FModelBuffer^, result^, FRecordBufferSize);
2793	>	end;
2794	>
2795	>	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
2796	>	var
2797	>	pb: PBlobDataArray;
2798	>	fs: TIBBlobStream;
2799	>	Buff: PChar;
2800	>	bTr, bDB: Boolean;
2801	>	begin
2802	>	Buff := GetActiveBuf;
2803	>	if Buff = nil then
2804	>	begin
2805	>	fs := TIBBlobStream.Create;
2806	>	fs.Mode := bmReadWrite;
2807	>	FBlobStreamList.Add(Pointer(fs));
2808	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
2809	>	exit;
2810	>	end;
2811	>	pb := PBlobDataArray(Buff + FBlobCacheOffset);
2812	>	if pb^[Field.Offset] = nil then
2813	>	begin
2814	>	AdjustRecordOnInsert(Buff);
2815	>	pb^[Field.Offset] := TIBBlobStream.Create;
2816	>	fs := pb^[Field.Offset];
2817	>	FBlobStreamList.Add(Pointer(fs));
2818	>	fs.Mode := bmReadWrite;
2819	>	fs.Database := Database;
2820	>	fs.Transaction := Transaction;
2821	>	fs.BlobID :=
2822	>	PISC_QUAD(@Buff[PRecordData(Buff)^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
2823	>	if (CachedUpdates) then
2824	>	begin
2825	>	bTr := not Transaction.InTransaction;
2826	>	bDB := not Database.Connected;
2827	>	if bDB then
2828	>	Database.Open;
2829	>	if bTr then
2830	>	Transaction.StartTransaction;
2831	>	fs.Seek(0, soFromBeginning);
2832	>	if bTr then
2833	>	Transaction.Commit;
2834	>	if bDB then
2835	>	Database.Close;
2836	>	end;
2837	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
2838	>	end else
2839	>	fs := pb^[Field.Offset];
2840	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
2841	>	end;
2842	>
2843	>	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
2844	>	const
2845	>	CMPLess = -1;
2846	>	CMPEql  =  0;
2847	>	CMPGtr  =  1;
2848	>	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
2849	>	(CMPGtr, CMPEql));
2850	>	begin
2851	>	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
2852	>
2853	>	if Result = 2 then
2854	>	begin
2855	>	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
2856	>	Result := CMPLess
2857	>	else
2858	>	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
2859	>	Result := CMPGtr
2860	>	else
2861	>	Result := CMPEql;
2862	>	end;
2863	>	end;
2864	>
2865	>	procedure TIBCustomDataSet.DoBeforeDelete;
2866	>	var
2867	>	Buff: PRecordData;
2868	>	begin
2869	>	if not CanDelete then
2870	>	IBError(ibxeCannotDelete, [nil]);
2871	>	Buff := PRecordData(GetActiveBuf);
2872	>	if FCachedUpdates and
2873	>	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
2874	>	SaveOldBuffer(PChar(Buff));
2875	>	inherited DoBeforeDelete;
2876	>	end;
2877	>
2878	>	procedure TIBCustomDataSet.DoAfterDelete;
2879	>	begin
2880	>	inherited DoAfterDelete;
2881	>	FBase.DoAfterDelete(self);
2882	>	InternalAutoCommit;
2883	>	end;
2884	>
2885	>	procedure TIBCustomDataSet.DoBeforeEdit;
2886	>	var
2887	>	Buff: PRecordData;
2888	>	begin
2889	>	Buff := PRecordData(GetActiveBuf);
2890	>	if not(CanEdit or (FQModify.SQL.Count <> 0) or
2891	>	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
2892	>	IBError(ibxeCannotUpdate, [nil]);
2893	>	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
2894	>	SaveOldBuffer(PChar(Buff));
2895	>	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
2896	>	inherited DoBeforeEdit;
2897	>	end;
2898	>
2899	>	procedure TIBCustomDataSet.DoAfterEdit;
2900	>	begin
2901	>	inherited DoAfterEdit;
2902	>	FBase.DoAfterEdit(self);
2903	>	end;
2904	>
2905	>	procedure TIBCustomDataSet.DoBeforeInsert;
2906	>	begin
2907	>	if not CanInsert then
2908	>	IBError(ibxeCannotInsert, [nil]);
2909	>	inherited DoBeforeInsert;
2910	>	end;
2911	>
2912	>	procedure TIBCustomDataSet.DoAfterInsert;
2913	>	begin
2914	>	if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
2915	>	GeneratorField.Apply;
2916	>	inherited DoAfterInsert;
2917	>	FBase.DoAfterInsert(self);
2918	>	end;
2919	>
2920	>	procedure TIBCustomDataSet.DoBeforeClose;
2921	>	begin
2922	>	inherited DoBeforeClose;
2923	>	if State in [dsInsert,dsEdit] then
2924	>	begin
2925	>	if FInTransactionEnd and (FCloseAction = TARollback) then
2926	>	Exit;
2927	>
2928	>	if DataSetCloseAction = dcSaveChanges then
2929	>	Post;
2930	>	{Note this can fail with an exception e.g. due to
2931	>	database validation error. In which case the dataset remains open }
2932	>	end;
2933	>	end;
2934	>
2935	>	procedure TIBCustomDataSet.DoBeforeOpen;
2936	>	var i: integer;
2937	>	begin
2938	>	if assigned(FParser) then
2939	>	FParser.Reset;
2940	>	for i := 0 to FIBLinks.Count - 1 do
2941	>	TIBControlLink(FIBLinks[i]).UpdateSQL(self);
2942	>	inherited DoBeforeOpen;
2943	>	for i := 0 to FIBLinks.Count - 1 do
2944	>	TIBControlLink(FIBLinks[i]).UpdateParams(self);
2945	>	end;
2946	>
2947	>	procedure TIBCustomDataSet.DoBeforePost;
2948	>	begin
2949	>	inherited DoBeforePost;
2950	>	if (State = dsInsert) and
2951	>	(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
2952	>	GeneratorField.Apply
2953	>	end;
2954	>
2955	>	procedure TIBCustomDataSet.DoAfterPost;
2956	>	begin
2957	>	inherited DoAfterPost;
2958	>	FBase.DoAfterPost(self);
2959	>	InternalAutoCommit;
2960	>	end;
2961	>
2962	>	procedure TIBCustomDataSet.FetchAll;
2963	>	var
2964	>	{$IFDEF NEW_TBOOKMARK }
2965	>	CurBookmark: TBookmark;
2966	>	{$ELSE}
2967	>	CurBookmark: string;
2968	>	{$ENDIF}
2969	>	begin
2970	>	FBase.SetCursor;
2971	>	try
2972	>	if FQSelect.EOF or not FQSelect.Open then
2973	>	exit;
2974	>	DisableControls;
2975	>	try
2976	>	CurBookmark := Bookmark;
2977	>	Last;
2978	>	Bookmark := CurBookmark;
2979	>	finally
2980	>	EnableControls;
2981	>	end;
2982	>	finally
2983	>	FBase.RestoreCursor;
2984	>	end;
2985	>	end;
2986	>
2987	>	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
2988	>	begin
2989	>	FreeMem(Buffer);
2990	>	Buffer := nil;
2991	>	end;
2992	>
2993	>	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
2994	>	begin
2995	>	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
2996	>	end;
2997	>
2998	>	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
2999	>	begin
3000	>	result := PRecordData(Buffer)^.rdBookmarkFlag;
3001	>	end;
3002	>
3003	>	function TIBCustomDataSet.GetCanModify: Boolean;
3004	>	begin
3005	>	result := (FQInsert.SQL.Text <> '') or
3006	>	(FQModify.SQL.Text <> '') or
3007	>	(FQDelete.SQL.Text <> '') or
3008	>	(Assigned(FUpdateObject));
3009	>	end;
3010	>
3011	>	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
3012	>	begin
3013	>	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
3014	>	begin
3015	>	UpdateCursorPos;
3016	>	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
3017	>	result := True;
3018	>	end
3019	>	else
3020	>	result := False;
3021	>	end;
3022	>
3023	>	function TIBCustomDataSet.GetDataSource: TDataSource;
3024	>	begin
3025	>	if FDataLink = nil then
3026	>	result := nil
3027	>	else
3028	>	result := FDataLink.DataSource;
3029	>	end;
3030	>
3031	>	function TIBCustomDataSet.GetDBAliasName(FieldNo: integer): string;
3032	>	begin
3033	>	Result := FAliasNameMap[FieldNo-1]
3034	>	end;
3035	>
3036	>	function TIBCustomDataSet.GetFieldDefFromAlias(aliasName: string): TFieldDef;
3037	>	var
3038	>	i: integer;
3039	>	begin
3040	>	Result := nil;
3041	>	for i := 0 to Length(FAliasNameMap) - 1 do
3042	>	if FAliasNameMap[i] = aliasName then
3043	>	begin
3044	>	Result := FieldDefs[i];
3045	>	Exit
3046	>	end;
3047	>	end;
3048	>
3049	>	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
3050	>	begin
3051	>	Result := DefaultFieldClasses[FieldType];
3052	>	end;
3053	>
3054	>	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
3055	>	begin
3056	>	result := GetFieldData(FieldByNumber(FieldNo), buffer);
3057	>	end;
3058	>
3059	>	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
3060	>	var
3061	>	Buff, Data: PChar;
3062	>	CurrentRecord: PRecordData;
3063	>	begin
3064	>	result := False;
3065	>	Buff := GetActiveBuf;
3066	>	if (Buff = nil) or
3067	>	(not IsVisible(Buff)) or not assigned(Field.DataSet) then
3068	>	exit;
3069	>	{ The intention here is to stuff the buffer with the data for the
3070	>	referenced field for the current record }
3071	>	CurrentRecord := PRecordData(Buff);
3072	>	if (Field.FieldNo < 0) then
3073	>	begin
3074	>	Inc(Buff, FRecordSize + Field.Offset);
3075	>	result := Boolean(Buff[0]);
3076	>	if result and (Buffer <> nil) then
3077	>	Move(Buff[1], Buffer^, Field.DataSize);
3078	>	end
3079	>	else if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
3080	>	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
3081	>	begin
3082	>	result := not CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdIsNull;
3083	>	if result and (Buffer <> nil) then
3084	>	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]] do
3085	>	begin
3086	>	Data := Buff + CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs;
3087	>	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
3088	>	begin
3089	>	if fdDataLength < Field.DataSize then
3090	>	begin
3091	>	Move(Data^, Buffer^, fdDataLength);
3092	>	PChar(Buffer)[fdDataLength] := #0;
3093	>	end
3094	>	else
3095	>	IBError(ibxeFieldSizeError,[Field.FieldName])
3096	>	end
3097	>	else
3098	>	Move(Data^, Buffer^, Field.DataSize);
3099	>	end;
3100	>	end;
3101	>	end;
3102	>
3103	>	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
3104	>	opposed to 0-based indexes.
3105	>	This is because we want LastRecordNumber/RecordCount = 1 }
3106	>
3107	>	function TIBCustomDataSet.GetRecNo: Integer;
3108	>	begin
3109	>	if GetActiveBuf = nil then
3110	>	result := 0
3111	>	else
3112	>	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
3113	>	end;
3114	>
3115	>	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
3116	>	DoCheck: Boolean): TGetResult;
3117	>	var
3118	>	Accept: Boolean;
3119	>	SaveState: TDataSetState;
3120	>	begin
3121	>	Result := grOK;
3122	>	if Filtered and Assigned(OnFilterRecord) then
3123	>	begin
3124	>	Accept := False;
3125	>	SaveState := SetTempState(dsFilter);
3126	>	while not Accept do
3127	>	begin
3128	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
3129	>	if Result <> grOK then
3130	>	break;
3131	>	FFilterBuffer := Buffer;
3132	>	try
3133	>	Accept := True;
3134	>	OnFilterRecord(Self, Accept);
3135	>	if not Accept and (GetMode = gmCurrent) then
3136	>	GetMode := gmPrior;
3137	>	except
3138	>	//        FBase.HandleException(Self);
3139	>	end;
3140	>	end;
3141	>	RestoreState(SaveState);
3142	>	end
3143	>	else
3144	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
3145	>	end;
3146	>
3147	>	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
3148	>	DoCheck: Boolean): TGetResult;
3149	>	begin
3150	>	result := grError;
3151	>	case GetMode of
3152	>	gmCurrent: begin
3153	>	if (FCurrentRecord >= 0) then begin
3154	>	if FCurrentRecord < FRecordCount then
3155	>	ReadRecordCache(FCurrentRecord, Buffer, False)
3156	>	else begin
3157	>	while (not FQSelect.EOF) and
3158	>	(FQSelect.Next <> nil) and
3159	>	(FCurrentRecord >= FRecordCount) do begin
3160	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3161	>	Inc(FRecordCount);
3162	>	end;
3163	>	FCurrentRecord := FRecordCount - 1;
3164	>	if (FCurrentRecord >= 0) then
3165	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3166	>	end;
3167	>	result := grOk;
3168	>	end else
3169	>	result := grBOF;
3170	>	end;
3171	>	gmNext: begin
3172	>	result := grOk;
3173	>	if FCurrentRecord = FRecordCount then
3174	>	result := grEOF
3175	>	else if FCurrentRecord = FRecordCount - 1 then begin
3176	>	if (not FQSelect.EOF) then begin
3177	>	FQSelect.Next;
3178	>	Inc(FCurrentRecord);
3179	>	end;
3180	>	if (FQSelect.EOF) then begin
3181	>	result := grEOF;
3182	>	end else begin
3183	>	Inc(FRecordCount);
3184	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
3185	>	end;
3186	>	end else if (FCurrentRecord < FRecordCount) then begin
3187	>	Inc(FCurrentRecord);
3188	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3189	>	end;
3190	>	end;
3191	>	else { gmPrior }
3192	>	begin
3193	>	if (FCurrentRecord = 0) then begin
3194	>	Dec(FCurrentRecord);
3195	>	result := grBOF;
3196	>	end else if (FCurrentRecord > 0) and
3197	>	(FCurrentRecord <= FRecordCount) then begin
3198	>	Dec(FCurrentRecord);
3199	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3200	>	result := grOk;
3201	>	end else if (FCurrentRecord = -1) then
3202	>	result := grBOF;
3203	>	end;
3204	>	end;
3205	>	if result = grOk then
3206	>	result := AdjustCurrentRecord(Buffer, GetMode);
3207	>	if result = grOk then with PRecordData(Buffer)^ do begin
3208	>	rdBookmarkFlag := bfCurrent;
3209	>	GetCalcFields(Buffer);
3210	>	end else if (result = grEOF) then begin
3211	>	CopyRecordBuffer(FModelBuffer, Buffer);
3212	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
3213	>	end else if (result = grBOF) then begin
3214	>	CopyRecordBuffer(FModelBuffer, Buffer);
3215	>	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
3216	>	end else if (result = grError) then begin
3217	>	CopyRecordBuffer(FModelBuffer, Buffer);
3218	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
3219	>	end;;
3220	>	end;
3221	>
3222	>	function TIBCustomDataSet.GetRecordCount: Integer;
3223	>	begin
3224	>	result := FRecordCount - FDeletedRecords;
3225	>	end;
3226	>
3227	>	function TIBCustomDataSet.GetRecordSize: Word;
3228	>	begin
3229	>	result := FRecordBufferSize;
3230	>	end;
3231	>
3232	>	procedure TIBCustomDataSet.InternalAutoCommit;
3233	>	begin
3234	>	with Transaction do
3235	>	if InTransaction and (FAutoCommit = acCommitRetaining) then
3236	>	begin
3237	>	if CachedUpdates then ApplyUpdates;
3238	>	CommitRetaining;
3239	>	end;
3240	>	end;
3241	>
3242	>	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
3243	>	begin
3244	>	CheckEditState;
3245	>	begin
3246	>	{ When adding records, we *always* append.
3247	>	Insertion is just too costly }
3248	>	AdjustRecordOnInsert(Buffer);
3249	>	with PRecordData(Buffer)^ do
3250	>	begin
3251	>	rdUpdateStatus := usInserted;
3252	>	rdCachedUpdateStatus := cusInserted;
3253	>	end;
3254	>	if not CachedUpdates then
3255	>	InternalPostRecord(FQInsert, Buffer)
3256	>	else begin
3257	>	WriteRecordCache(FCurrentRecord, Buffer);
3258	>	FUpdatesPending := True;
3259	>	end;
3260	>	Inc(FRecordCount);
3261	>	InternalSetToRecord(Buffer);
3262	>	end
3263	>	end;
3264	>
3265	>	procedure TIBCustomDataSet.InternalCancel;
3266	>	var
3267	>	Buff: PChar;
3268	>	CurRec: Integer;
3269	>	begin
3270	>	inherited InternalCancel;
3271	>	Buff := GetActiveBuf;
3272	>	if Buff <> nil then begin
3273	>	CurRec := FCurrentRecord;
3274	>	AdjustRecordOnInsert(Buff);
3275	>	if (State = dsEdit) then begin
3276	>	CopyRecordBuffer(FOldBuffer, Buff);
3277	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3278	>	end else begin
3279	>	CopyRecordBuffer(FModelBuffer, Buff);
3280	>	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
3281	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
3282	>	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
3283	>	FCurrentRecord := CurRec;
3284	>	end;
3285	>	end;
3286	>	end;
3287	>
3288	>
3289	>	procedure TIBCustomDataSet.InternalClose;
3290	>	begin
3291	>	if FDidActivate then
3292	>	DeactivateTransaction;
3293	>	FQSelect.Close;
3294	>	ClearBlobCache;
3295	>	FreeRecordBuffer(FModelBuffer);
3296	>	FreeRecordBuffer(FOldBuffer);
3297	>	FCurrentRecord := -1;
3298	>	FOpen := False;
3299	>	FRecordCount := 0;
3300	>	FDeletedRecords := 0;
3301	>	FRecordSize := 0;
3302	>	FBPos := 0;
3303	>	FOBPos := 0;
3304	>	FCacheSize := 0;
3305	>	FOldCacheSize := 0;
3306	>	FBEnd := 0;
3307	>	FOBEnd := 0;
3308	>	FreeMem(FBufferCache);
3309	>	FBufferCache := nil;
3310	>	FreeMem(FOldBufferCache);
3311	>	FOldBufferCache := nil;
3312	>	BindFields(False);
3313	>	ResetParser;
3314	>	if DefaultFields then DestroyFields;
3315	>	end;
3316	>
3317	>	procedure TIBCustomDataSet.InternalDelete;
3318	>	var
3319	>	Buff: PChar;
3320	>	begin
3321	>	FBase.SetCursor;
3322	>	try
3323	>	Buff := GetActiveBuf;
3324	>	if CanDelete then
3325	>	begin
3326	>	if not CachedUpdates then
3327	>	InternalDeleteRecord(FQDelete, Buff)
3328	>	else
3329	>	begin
3330	>	with PRecordData(Buff)^ do
3331	>	begin
3332	>	if rdCachedUpdateStatus = cusInserted then
3333	>	rdCachedUpdateStatus := cusUninserted
3334	>	else begin
3335	>	rdUpdateStatus := usDeleted;
3336	>	rdCachedUpdateStatus := cusDeleted;
3337	>	end;
3338	>	end;
3339	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3340	>	end;
3341	>	Inc(FDeletedRecords);
3342	>	FUpdatesPending := True;
3343	>	end else
3344	>	IBError(ibxeCannotDelete, [nil]);
3345	>	finally
3346	>	FBase.RestoreCursor;
3347	>	end;
3348	>	end;
3349	>
3350	>	procedure TIBCustomDataSet.InternalFirst;
3351	>	begin
3352	>	FCurrentRecord := -1;
3353	>	end;
3354	>
3355	>	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
3356	>	begin
3357	>	FCurrentRecord := PInteger(Bookmark)^;
3358	>	end;
3359	>
3360	>	procedure TIBCustomDataSet.InternalHandleException;
3361	>	begin
3362	>	FBase.HandleException(Self)
3363	>	end;
3364	>
3365	>	procedure TIBCustomDataSet.InternalInitFieldDefs;
3366	>	begin
3367	>	if not InternalPrepared then
3368	>	begin
3369	>	InternalPrepare;
3370	>	exit;
3371	>	end;
3372	>	FieldDefsFromQuery(FQSelect);
3373	>	end;
3374	>
3375	>	procedure TIBCustomDataSet.FieldDefsFromQuery(SourceQuery: TIBSQL);
3376	>	const
3377	>	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
3378	>	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
3379	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
3380	>	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
3381	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
3382	>	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
3383	>	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
3384	>	var
3385	>	FieldType: TFieldType;
3386	>	FieldSize: Word;
3387	>	charSetID: integer;
3388	>	CharSetSize: integer;
3389	>	CharSetName: RawByteString;
3390	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3391	>	FieldCodePage: TSystemCodePage;
3392	>	{$ENDIF}
3393	>	FieldNullable : Boolean;
3394	>	i, FieldPosition, FieldPrecision: Integer;
3395	>	FieldAliasName, DBAliasName: string;
3396	>	RelationName, FieldName: string;
3397	>	Query : TIBSQL;
3398	>	FieldIndex: Integer;
3399	>	FRelationNodes : TRelationNode;
3400	>
3401	>	function Add_Node(Relation, Field : String) : TRelationNode;
3402	>	var
3403	>	FField : TFieldNode;
3404	>	begin
3405	>	if FRelationNodes.RelationName = '' then
3406	>	Result := FRelationNodes
3407	>	else
3408	>	begin
3409	>	Result := TRelationNode.Create;
3410	>	Result.NextRelation := FRelationNodes;
3411	>	end;
3412	>	Result.RelationName := Relation;
3413	>	FRelationNodes := Result;
3414	>	Query.Params[0].AsString := Relation;
3415	>	Query.ExecQuery;
3416	>	while not Query.Eof do
3417	>	begin
3418	>	FField := TFieldNode.Create;
3419	>	FField.FieldName := Query.Fields[2].AsString;
3420	>	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
3421	>	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
3422	>	FField.NextField := Result.FieldNodes;
3423	>	Result.FieldNodes := FField;
3424	>	Query.Next;
3425	>	end;
3426	>	Query.Close;
3427	>	end;
3428	>
3429	>	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
3430	>	var
3431	>	FRelation : TRelationNode;
3432	>	FField : TFieldNode;
3433	>	begin
3434	>	FRelation := FRelationNodes;
3435	>	while Assigned(FRelation) and
3436	>	(FRelation.RelationName <> Relation) do
3437	>	FRelation := FRelation.NextRelation;
3438	>	if not Assigned(FRelation) then
3439	>	FRelation := Add_Node(Relation, Field);
3440	>	Result := false;
3441	>	FField := FRelation.FieldNodes;
3442	>	while Assigned(FField) do
3443	>	if FField.FieldName = Field then
3444	>	begin
3445	>	Result := Ffield.COMPUTED_BLR;
3446	>	Exit;
3447	>	end
3448	>	else
3449	>	FField := Ffield.NextField;
3450	>	end;
3451	>
3452	>	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
3453	>	var
3454	>	FRelation : TRelationNode;
3455	>	FField : TFieldNode;
3456	>	begin
3457	>	FRelation := FRelationNodes;
3458	>	while Assigned(FRelation) and
3459	>	(FRelation.RelationName <> Relation) do
3460	>	FRelation := FRelation.NextRelation;
3461	>	if not Assigned(FRelation) then
3462	>	FRelation := Add_Node(Relation, Field);
3463	>	Result := false;
3464	>	FField := FRelation.FieldNodes;
3465	>	while Assigned(FField) do
3466	>	if FField.FieldName = Field then
3467	>	begin
3468	>	Result := Ffield.DEFAULT_VALUE;
3469	>	Exit;
3470	>	end
3471	>	else
3472	>	FField := Ffield.NextField;
3473	>	end;
3474	>
3475	>	Procedure FreeNodes;
3476	>	var
3477	>	FRelation : TRelationNode;
3478	>	FField : TFieldNode;
3479	>	begin
3480	>	while Assigned(FRelationNodes) do
3481	>	begin
3482	>	While Assigned(FRelationNodes.FieldNodes) do
3483	>	begin
3484	>	FField := FRelationNodes.FieldNodes.NextField;
3485	>	FRelationNodes.FieldNodes.Free;
3486	>	FRelationNodes.FieldNodes := FField;
3487	>	end;
3488	>	FRelation := FRelationNodes.NextRelation;
3489	>	FRelationNodes.Free;
3490	>	FRelationNodes := FRelation;
3491	>	end;
3492	>	end;
3493	>
3494	>	begin
3495	>	FRelationNodes := TRelationNode.Create;
3496	>	FNeedsRefresh := False;
3497	>	Database.InternalTransaction.StartTransaction;
3498	>	Query := TIBSQL.Create(self);
3499	>	try
3500	>	Query.Database := DataBase;
3501	>	Query.Transaction := Database.InternalTransaction;
3502	>	FieldDefs.BeginUpdate;
3503	>	FieldDefs.Clear;
3504	>	FieldIndex := 0;
3505	>	if (Length(FMappedFieldPosition) < SourceQuery.Current.Count) then
3506	>	SetLength(FMappedFieldPosition, SourceQuery.Current.Count);
3507	>	Query.SQL.Text := DefaultSQL;
3508	>	Query.Prepare;
3509	>	SetLength(FAliasNameMap, SourceQuery.Current.Count);
3510	>	SetLength(FAliasNameList, SourceQuery.Current.Count);
3511	>	for i := 0 to SourceQuery.Current.Count - 1 do
3512	>	with SourceQuery.Current[i].Data^ do
3513	>	begin
3514	>	{ Get the field name }
3515	>	FieldAliasName := SourceQuery.Current[i].Name;
3516	>	SetString(DBAliasName, aliasname, aliasname_length);
3517	>	SetString(RelationName, relname, relname_length);
3518	>	SetString(FieldName, sqlname, sqlname_length);
3519	>	FAliasNameList[i] := DBAliasName;
3520	>	FieldSize := 0;
3521	>	FieldPrecision := 0;
3522	>	FieldNullable := SourceQuery.Current[i].IsNullable;
3523	>	CharSetSize := 0;
3524	>	CharSetName := '';
3525	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3526	>	FieldCodePage := CP_NONE;
3527	>	{$ENDIF}
3528	>	case sqltype and not 1 of
3529	>	{ All VARCHAR's must be converted to strings before recording
3530	>	their values }
3531	>	SQL_VARYING, SQL_TEXT:
3532	>	begin
3533	>	CharSetID := SourceQuery.Current[i].GetCharSetID;
3534	>	TFirebirdCharacterSets.CharSetWidth(CharSetID,CharSetSize);
3535	>	CharSetName := TFirebirdCharacterSets.GetCharsetName(CharSetID);
3536	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3537	>	TFirebirdCharacterSets.CharSetID2CodePage(CharSetID,FieldCodePage);
3538	>	{$ENDIF}
3539	>	FieldSize := sqllen;
3540	>	FieldType := ftString;
3541	>	end;
3542	>	{ All Doubles/Floats should be cast to doubles }
3543	>	SQL_DOUBLE, SQL_FLOAT:
3544	>	FieldType := ftFloat;
3545	>	SQL_SHORT:
3546	>	begin
3547	>	if (sqlscale = 0) then
3548	>	FieldType := ftSmallInt
3549	>	else begin
3550	>	FieldType := ftBCD;
3551	>	FieldPrecision := 4;
3552	>	FieldSize := -sqlscale;
3553	>	end;
3554	>	end;
3555	>	SQL_LONG:
3556	>	begin
3557	>	if (sqlscale = 0) then
3558	>	FieldType := ftInteger
3559	>	else if (sqlscale >= (-4)) then
3560	>	begin
3561	>	FieldType := ftBCD;
3562	>	FieldPrecision := 9;
3563	>	FieldSize := -sqlscale;
3564	>	end
3565	>	else
3566	>	if Database.SQLDialect = 1 then
3567	>	FieldType := ftFloat
3568	>	else
3569	>	if (FieldCount > i) and (Fields[i] is TFloatField) then
3570	>	FieldType := ftFloat
3571	>	else
3572	>	begin
3573	>	FieldType := ftFMTBCD;
3574	>	FieldPrecision := 9;
3575	>	FieldSize := -sqlscale;
3576	>	end;
3577	>	end;
3578	>
3579	>	SQL_INT64:
3580	>	begin
3581	>	if (sqlscale = 0) then
3582	>	FieldType := ftLargeInt
3583	>	else if (sqlscale >= (-4)) then
3584	>	begin
3585	>	FieldType := ftBCD;
3586	>	FieldPrecision := 18;
3587	>	FieldSize := -sqlscale;
3588	>	end
3589	>	else
3590	>	FieldType := ftFloat
3591	>	end;
3592	>	SQL_TIMESTAMP: FieldType := ftDateTime;
3593	>	SQL_TYPE_TIME: FieldType := ftTime;
3594	>	SQL_TYPE_DATE: FieldType := ftDate;
3595	>	SQL_BLOB:
3596	>	begin
3597	>	FieldSize := sizeof (TISC_QUAD);
3598	>	if (sqlsubtype = 1) then
3599	>	begin
3600	>	CharSetID := SourceQuery.Current[i].GetCharSetID;
3601	>	TFirebirdCharacterSets.CharSetWidth(CharSetID,CharSetSize);
3602	>	CharSetName := TFirebirdCharacterSets.GetCharsetName(CharSetID);
3603	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3604	>	TFirebirdCharacterSets.CharSetID2CodePage(CharSetID,FieldCodePage);
3605	>	{$ENDIF}
3606	>	FieldType := ftMemo;
3607	>	end
3608	>	else
3609	>	FieldType := ftBlob;
3610	>	end;
3611	>	SQL_ARRAY:
3612	>	begin
3613	>	FieldSize := sizeof (TISC_QUAD);
3614	>	FieldType := ftUnknown;
3615	>	end;
3616	>	SQL_BOOLEAN:
3617	>	FieldType:= ftBoolean;
3618	>	else
3619	>	FieldType := ftUnknown;
3620	>	end;
3621	>	FieldPosition := i + 1;
3622	>	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
3623	>	begin
3624	>	FMappedFieldPosition[FieldIndex] := FieldPosition;
3625	>	Inc(FieldIndex);
3626	>	with TIBFieldDef.Create(FieldDefs,'',FieldType,0,False,FieldDefs.Count+1) do
3627	>	begin
3628	>	Name := FieldAliasName;
3629	>	FAliasNameMap[FieldNo-1] := DBAliasName;
3630	>	Size := FieldSize;
3631	>	Precision := FieldPrecision;
3632	>	Required := not FieldNullable;
3633	>	InternalCalcField := False;
3634	>	CharacterSetSize := CharSetSize;
3635	>	CharacterSetName := CharSetName;
3636	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3637	>	CodePage := FieldCodePage;
3638	>	{$ENDIF}
3639	>	if (FieldName <> '') and (RelationName <> '') then
3640	>	begin
3641	>	if Has_COMPUTED_BLR(RelationName, FieldName) then
3642	>	begin
3643	>	Attributes := [faReadOnly];
3644	>	InternalCalcField := True;
3645	>	FNeedsRefresh := True;
3646	>	end
3647	>	else
3648	>	begin
3649	>	if Has_DEFAULT_VALUE(RelationName, FieldName) then
3650	>	begin
3651	>	if not FieldNullable then
3652	>	Attributes := [faRequired];
3653	>	end
3654	>	else
3655	>	FNeedsRefresh := True;
3656	>	end;
3657	>	end;
3658	>	end;
3659	>	end;
3660	>	end;
3661	>	finally
3662	>	Query.free;
3663	>	FreeNodes;
3664	>	Database.InternalTransaction.Commit;
3665	>	FieldDefs.EndUpdate;
3666	>	end;
3667	>	end;
3668	>
3669	>	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
3670	>	begin
3671	>	CopyRecordBuffer(FModelBuffer, Buffer);
3672	>	end;
3673	>
3674	>	procedure TIBCustomDataSet.InternalLast;
3675	>	var
3676	>	Buffer: PChar;
3677	>	begin
3678	>	if (FQSelect.EOF) then
3679	>	FCurrentRecord := FRecordCount
3680	>	else begin
3681	>	Buffer := AllocRecordBuffer;
3682	>	try
3683	>	while FQSelect.Next <> nil do
3684	>	begin
3685	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3686	>	Inc(FRecordCount);
3687	>	end;
3688	>	FCurrentRecord := FRecordCount;
3689	>	finally
3690	>	FreeRecordBuffer(Buffer);
3691	>	end;
3692	>	end;
3693	>	end;
3694	>
3695	>	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
3696	>	var
3697	>	i: Integer;
3698	>	cur_param: TIBXSQLVAR;
3699	>	cur_field: TField;
3700	>	s: TStream;
3701	>	begin
3702	>	if FQSelect.SQL.Text = '' then
3703	>	IBError(ibxeEmptyQuery, [nil]);
3704	>	if not FInternalPrepared then
3705	>	InternalPrepare;
3706	>	if (SQLParams.Count > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
3707	>	begin
3708	>	for i := 0 to SQLParams.Count - 1 do
3709	>	begin
3710	>	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
3711	>	cur_param := SQLParams[i];
3712	>	if (cur_field <> nil) then begin
3713	>	if (cur_field.IsNull) then
3714	>	cur_param.IsNull := True
3715	>	else case cur_field.DataType of
3716	>	ftString:
3717	>	cur_param.AsString := cur_field.AsString;
3718	>	ftBoolean:
3719	>	cur_param.AsBoolean := cur_field.AsBoolean;
3720	>	ftSmallint, ftWord:
3721	>	cur_param.AsShort := cur_field.AsInteger;
3722	>	ftInteger:
3723	>	cur_param.AsLong := cur_field.AsInteger;
3724	>	ftLargeInt:
3725	>	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
3726	>	ftFloat, ftCurrency:
3727	>	cur_param.AsDouble := cur_field.AsFloat;
3728	>	ftBCD:
3729	>	cur_param.AsCurrency := cur_field.AsCurrency;
3730	>	ftDate:
3731	>	cur_param.AsDate := cur_field.AsDateTime;
3732	>	ftTime:
3733	>	cur_param.AsTime := cur_field.AsDateTime;
3734	>	ftDateTime:
3735	>	cur_param.AsDateTime := cur_field.AsDateTime;
3736	>	ftBlob, ftMemo:
3737	>	begin
3738	>	s := nil;
3739	>	try
3740	>	s := DataSource.DataSet.
3741	>	CreateBlobStream(cur_field, bmRead);
3742	>	cur_param.LoadFromStream(s);
3743	>	finally
3744	>	s.free;
3745	>	end;
3746	>	end;
3747	>	else
3748	>	IBError(ibxeNotSupported, [nil]);
3749	>	end;
3750	>	end;
3751	>	end;
3752	>	end;
3753	>	end;
3754	>
3755	>	procedure TIBCustomDataSet.ReQuery;
3756	>	begin
3757	>	FQSelect.Close;
3758	>	ClearBlobCache;
3759	>	FCurrentRecord := -1;
3760	>	FRecordCount := 0;
3761	>	FDeletedRecords := 0;
3762	>	FBPos := 0;
3763	>	FOBPos := 0;
3764	>	FBEnd := 0;
3765	>	FOBEnd := 0;
3766	>	FQSelect.Close;
3767	>	FQSelect.ExecQuery;
3768	>	FOpen := FQSelect.Open;
3769	>	First;
3770	>	end;
3771	>
3772	>	procedure TIBCustomDataSet.InternalOpen;
3773	>
3774	>	function RecordDataLength(n: Integer): Long;
3775	>	begin
3776	>	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
3777	>	end;
3778	>
3779	>	function GetFieldDef(aFieldNo: integer): TIBFieldDef;
3780	>	var i: integer;
3781	>	begin
3782	>	Result := nil;
3783	>	for i := 0 to FieldDefs.Count - 1 do
3784	>	if FieldDefs[i].FieldNo = aFieldNo then
3785	>	begin
3786	>	Result := TIBFieldDef(FieldDefs[i]);
3787	>	break;
3788	>	end;
3789	>	end;
3790	>
3791	>	procedure SetExtendedProperties;
3792	>	var i: integer;
3793	>	IBFieldDef: TIBFieldDef;
3794	>	begin
3795	>	for i := 0 to Fields.Count - 1 do
3796	>	if Fields[i].FieldNo > 0 then
3797	>	begin
3798	>	if(Fields[i] is TIBStringField) then
3799	>	with TIBStringField(Fields[i]) do
3800	>	begin
3801	>	IBFieldDef := GetFieldDef(FieldNo);
3802	>	if IBFieldDef <> nil then
3803	>	begin
3804	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
3805	>	CharacterSetName := IBFieldDef.CharacterSetName;
3806	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3807	>	CodePage := IBFieldDef.CodePage;
3808	>	{$ENDIF}
3809	>	end;
3810	>	end
3811	>	else
3812	>	if(Fields[i] is TIBMemoField) then
3813	>	with TIBMemoField(Fields[i]) do
3814	>	begin
3815	>	IBFieldDef := GetFieldDef(FieldNo);
3816	>	if IBFieldDef <> nil then
3817	>	begin
3818	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
3819	>	CharacterSetName := IBFieldDef.CharacterSetName;
3820	>	{$IFDEF HAS_ANSISTRING_CODEPAGE}
3821	>	CodePage := IBFieldDef.CodePage;
3822	>	{$ENDIF}
3823	>	end;
3824	>	end
3825	>	end
3826	>	end;
3827	>
3828	>	begin
3829	>	FBase.SetCursor;
3830	>	try
3831	>	ActivateConnection;
3832	>	ActivateTransaction;
3833	>	if FQSelect.SQL.Text = '' then
3834	>	IBError(ibxeEmptyQuery, [nil]);
3835	>	if not FInternalPrepared then
3836	>	InternalPrepare;
3837	>	if FQSelect.SQLType = SQLSelect then
3838	>	begin
3839	>	if DefaultFields then
3840	>	CreateFields;
3841	>	BindFields(True);
3842	>	SetExtendedProperties;
3843	>	FCurrentRecord := -1;
3844	>	FQSelect.ExecQuery;
3845	>	FOpen := FQSelect.Open;
3846	>
3847	>	{ Initialize offsets, buffer sizes, etc...
3848	>	1. Initially FRecordSize is just the "RecordDataLength".
3849	>	2. Allocate a "model" buffer and do a dummy fetch
3850	>	3. After the dummy fetch, FRecordSize will be appropriately
3851	>	adjusted to reflect the additional "weight" of the field
3852	>	data.
3853	>	4. Set up the FCalcFieldsOffset, FBlobCacheOffset and FRecordBufferSize.
3854	>	5. Now, with the BufferSize available, allocate memory for chunks of records
3855	>	6. Re-allocate the model buffer, accounting for the new
3856	>	FRecordBufferSize.
3857	>	7. Finally, calls to AllocRecordBuffer will work!.
3858	>	}
3859	>	{Step 1}
3860	>	FRecordSize := RecordDataLength(FQSelect.Current.Count);
3861	>	{Step 2, 3}
3862	>	IBAlloc(FModelBuffer, 0, FRecordSize);
3863	>	FetchCurrentRecordToBuffer(FQSelect, -1, FModelBuffer);
3864	>	{Step 4}
3865	>	FCalcFieldsOffset := FRecordSize;
3866	>	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
3867	>	FRecordBufferSize := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
3868	>	{Step 5}
3869	>	if UniDirectional then
3870	>	FBufferChunkSize := FRecordBufferSize * UniCache
3871	>	else
3872	>	FBufferChunkSize := FRecordBufferSize * BufferChunks;
3873	>	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
3874	>	if FCachedUpdates or (csReading in ComponentState) then
3875	>	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
3876	>	FBPos := 0;
3877	>	FOBPos := 0;
3878	>	FBEnd := 0;
3879	>	FOBEnd := 0;
3880	>	FCacheSize := FBufferChunkSize;
3881	>	FOldCacheSize := FBufferChunkSize;
3882	>	{Step 6}
3883	>	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.Current.Count),
3884	>	FRecordBufferSize);
3885	>	{Step 7}
3886	>	FOldBuffer := AllocRecordBuffer;
3887	>	end
3888	>	else
3889	>	FQSelect.ExecQuery;
3890	>	finally
3891	>	FBase.RestoreCursor;
3892	>	end;
3893	>	end;
3894	>
3895	>	procedure TIBCustomDataSet.InternalPost;
3896	>	var
3897	>	Qry: TIBSQL;
3898	>	Buff: PChar;
3899	>	bInserting: Boolean;
3900	>	begin
3901	>	FBase.SetCursor;
3902	>	try
3903	>	Buff := GetActiveBuf;
3904	>	CheckEditState;
3905	>	AdjustRecordOnInsert(Buff);
3906	>	if (State = dsInsert) then
3907	>	begin
3908	>	bInserting := True;
3909	>	Qry := FQInsert;
3910	>	PRecordData(Buff)^.rdUpdateStatus := usInserted;
3911	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3912	>	WriteRecordCache(FRecordCount, Buff);
3913	>	FCurrentRecord := FRecordCount;
3914	>	end
3915	>	else begin
3916	>	bInserting := False;
3917	>	Qry := FQModify;
3918	>	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
3919	>	begin
3920	>	PRecordData(Buff)^.rdUpdateStatus := usModified;
3921	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
3922	>	end
3923	>	else if PRecordData(Buff)^.
3924	>	rdCachedUpdateStatus = cusUninserted then
3925	>	begin
3926	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
3927	>	Dec(FDeletedRecords);
3928	>	end;
3929	>	end;
3930	>	if (not CachedUpdates) then
3931	>	InternalPostRecord(Qry, Buff)
3932	>	else begin
3933	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3934	>	FUpdatesPending := True;
3935	>	end;
3936	>	if bInserting then
3937	>	Inc(FRecordCount);
3938	>	finally
3939	>	FBase.RestoreCursor;
3940	>	end;
3941	>	end;
3942	>
3943	>	procedure TIBCustomDataSet.InternalRefresh;
3944	>	begin
3945	>	inherited InternalRefresh;
3946	>	InternalRefreshRow;
3947	>	end;
3948	>
3949	>	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
3950	>	begin
3951	>	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
3952	>	end;
3953	>
3954	>	function TIBCustomDataSet.IsCursorOpen: Boolean;
3955	>	begin
3956	>	result := FOpen;
3957	>	end;
3958	>
3959	>	procedure TIBCustomDataSet.Loaded;
3960	>	begin
3961	>	if assigned(FQSelect) then
3962	>	FBaseSQLSelect.assign(FQSelect.SQL);
3963	>	inherited Loaded;
3964	>	end;
3965	>
3966	>	procedure TIBCustomDataSet.Post;
3967	>	var CancelPost: boolean;
3968	>	begin
3969	>	CancelPost := false;
3970	>	if assigned(FOnValidatePost) then
3971	>	OnValidatePost(self,CancelPost);
3972	>	if CancelPost then
3973	>	Cancel
3974	>	else
3975	>	inherited Post;
3976	>	end;
3977	>
3978	>	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
3979	>	Options: TLocateOptions): Boolean;
3980	>	var
3981	>	{$IFDEF NEW_TBOOKMARK }
3982	>	CurBookmark: TBookmark;
3983	>	{$ELSE}
3984	>	CurBookmark: string;
3985	>	{$ENDIF}
3986	>	begin
3987	>	DisableControls;
3988	>	try
3989	>	CurBookmark := Bookmark;
3990	>	First;
3991	>	result := InternalLocate(KeyFields, KeyValues, Options);
3992	>	if not result then
3993	>	Bookmark := CurBookmark;
3994	>	finally
3995	>	EnableControls;
3996	>	end;
3997	>	end;
3998	>
3999	>	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
4000	>	const ResultFields: string): Variant;
4001	>	var
4002	>	fl: TList;
4003	>	{$IFDEF NEW_TBOOKMARK }
4004	>	CurBookmark: TBookmark;
4005	>	{$ELSE}
4006	>	CurBookmark: string;
4007	>	{$ENDIF}
4008	>	begin
4009	>	DisableControls;
4010	>	fl := TList.Create;
4011	>	CurBookmark := Bookmark;
4012	>	try
4013	>	First;
4014	>	if InternalLocate(KeyFields, KeyValues, []) then
4015	>	begin
4016	>	if (ResultFields <> '') then
4017	>	result := FieldValues[ResultFields]
4018	>	else
4019	>	result := NULL;
4020	>	end
4021	>	else
4022	>	result := Null;
4023	>	finally
4024	>	Bookmark := CurBookmark;
4025	>	fl.Free;
4026	>	EnableControls;
4027	>	end;
4028	>	end;
4029	>
4030	>	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
4031	>	begin
4032	>	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
4033	>	end;
4034	>
4035	>	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
4036	>	begin
4037	>	PRecordData(Buffer)^.rdBookmarkFlag := Value;
4038	>	end;
4039	>
4040	>	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
4041	>	begin
4042	>	if not Value and FCachedUpdates then
4043	>	CancelUpdates;
4044	>	if (not (csReading in ComponentState)) and Value then
4045	>	CheckDatasetClosed;
4046	>	FCachedUpdates := Value;
4047	>	end;
4048	>
4049	>	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
4050	>	begin
4051	>	if IsLinkedTo(Value) then
4052	>	IBError(ibxeCircularReference, [nil]);
4053	>	if FDataLink <> nil then
4054	>	FDataLink.DataSource := Value;
4055	>	end;
4056	>
4057	>	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
4058	>	var
4059	>	Buff, TmpBuff: PChar;
4060	>	MappedFieldPos: integer;
4061	>	begin
4062	>	Buff := GetActiveBuf;
4063	>	if Field.FieldNo < 0 then
4064	>	begin
4065	>	TmpBuff := Buff + FRecordSize + Field.Offset;
4066	>	Boolean(TmpBuff[0]) := LongBool(Buffer);
4067	>	if Boolean(TmpBuff[0]) then
4068	>	Move(Buffer^, TmpBuff[1], Field.DataSize);
4069	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
4070	>	end
4071	>	else begin
4072	>	CheckEditState;
4073	>	with PRecordData(Buff)^ do
4074	>	begin
4075	>	{ If inserting, Adjust record position }
4076	>	AdjustRecordOnInsert(Buff);
4077	>	MappedFieldPos := FMappedFieldPosition[Field.FieldNo - 1];
4078	>	if (MappedFieldPos > 0) and
4079	>	(MappedFieldPos <= rdFieldCount) then
4080	>	begin
4081	>	Field.Validate(Buffer);
4082	>	if (Buffer = nil) or
4083	>	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
4084	>	rdFields[MappedFieldPos].fdIsNull := True
4085	>	else begin
4086	>	Move(Buffer^, Buff[rdFields[MappedFieldPos].fdDataOfs],
4087	>	rdFields[MappedFieldPos].fdDataSize);
4088	>	if (rdFields[MappedFieldPos].fdDataType = SQL_TEXT) or
4089	>	(rdFields[MappedFieldPos].fdDataType = SQL_VARYING) then
4090	>	rdFields[MappedFieldPos].fdDataLength := StrLen(PChar(Buffer));
4091	>	rdFields[MappedFieldPos].fdIsNull := False;
4092	>	if rdUpdateStatus = usUnmodified then
4093	>	begin
4094	>	if CachedUpdates then
4095	>	begin
4096	>	FUpdatesPending := True;
4097	>	if State = dsInsert then
4098	>	rdCachedUpdateStatus := cusInserted
4099	>	else if State = dsEdit then
4100	>	rdCachedUpdateStatus := cusModified;
4101	>	end;
4102	>
4103	>	if State = dsInsert then
4104	>	rdUpdateStatus := usInserted
4105	>	else
4106	>	rdUpdateStatus := usModified;
4107	>	end;
4108	>	WriteRecordCache(rdRecordNumber, Buff);
4109	>	SetModified(True);
4110	>	end;
4111	>	end;
4112	>	end;
4113	>	end;
4114	>	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
4115	>	DataEvent(deFieldChange, PtrInt(Field));
4116	>	end;
4117	>
4118	>	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
4119	>	begin
4120	>	CheckBrowseMode;
4121	>	if (Value < 1) then
4122	>	Value := 1
4123	>	else if Value > FRecordCount then
4124	>	begin
4125	>	InternalLast;
4126	>	Value := Min(FRecordCount, Value);
4127	>	end;
4128	>	if (Value <> RecNo) then
4129	>	begin
4130	>	DoBeforeScroll;
4131	>	FCurrentRecord := Value - 1;
4132	>	Resync([]);
4133	>	DoAfterScroll;
4134	>	end;
4135	>	end;
4136	>
4137	>	procedure TIBCustomDataSet.Disconnect;
4138	>	begin
4139	>	Close;
4140	>	InternalUnPrepare;
4141	>	end;
4142	>
4143	>	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
4144	>	begin
4145	>	if not CanModify then
4146	>	IBError(ibxeCannotUpdate, [nil])
4147	>	else
4148	>	FUpdateMode := Value;
4149	>	end;
4150	>
4151	>
4152	>	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
4153	>	begin
4154	>	if Value <> FUpdateObject then
4155	>	begin
4156	>	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
4157	>	FUpdateObject.DataSet := nil;
4158	>	FUpdateObject := Value;
4159	>	if Assigned(FUpdateObject) then
4160	>	begin
4161	>	if Assigned(FUpdateObject.DataSet) and
4162	>	(FUpdateObject.DataSet <> Self) then
4163	>	FUpdateObject.DataSet.UpdateObject := nil;
4164	>	FUpdateObject.DataSet := Self;
4165	>	end;
4166	>	end;
4167	>	end;
4168	>
4169	>	function TIBCustomDataSet.ConstraintsStored: Boolean;
4170	>	begin
4171	>	Result := Constraints.Count > 0;
4172	>	end;
4173	>
4174	>	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
4175	>	begin
4176	>	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
4177	>	end;
4178	>
4179	>	procedure TIBCustomDataSet.ClearIBLinks;
4180	>	var i: integer;
4181	>	begin
4182	>	for i := FIBLinks.Count - 1 downto 0 do
4183	>	TIBControlLink(FIBLinks[i]).IBDataSet := nil;
4184	>	end;
4185	>
4186	>
4187	>	procedure TIBCustomDataSet.InternalUnPrepare;
4188	>	begin
4189	>	if FInternalPrepared then
4190	>	begin
4191	>	CheckDatasetClosed;
4192	>	FieldDefs.Clear;
4193	>	FieldDefs.Updated := false;
4194	>	FInternalPrepared := False;
4195	>	Setlength(FAliasNameList,0);
4196	>	end;
4197	>	end;
4198	>
4199	>	procedure TIBCustomDataSet.InternalExecQuery;
4200	>	var
4201	>	DidActivate: Boolean;
4202	>	begin
4203	>	DidActivate := False;
4204	>	FBase.SetCursor;
4205	>	try
4206	>	ActivateConnection;
4207	>	DidActivate := ActivateTransaction;
4208	>	if FQSelect.SQL.Text = '' then
4209	>	IBError(ibxeEmptyQuery, [nil]);
4210	>	if not FInternalPrepared then
4211	>	InternalPrepare;
4212	>	if FQSelect.SQLType = SQLSelect then
4213	>	begin
4214	>	IBError(ibxeIsASelectStatement, [nil]);
4215	>	end
4216	>	else
4217	>	FQSelect.ExecQuery;
4218	>	finally
4219	>	if DidActivate then
4220	>	DeactivateTransaction;
4221	>	FBase.RestoreCursor;
4222	>	end;
4223	>	end;
4224	>
4225	>	function TIBCustomDataSet.GetSelectStmtHandle: TISC_STMT_HANDLE;
4226	>	begin
4227	>	Result := FQSelect.Handle;
4228	>	end;
4229	>
4230	>	function TIBCustomDataSet.GetParser: TSelectSQLParser;
4231	>	begin
4232	>	if not assigned(FParser) then
4233	>	FParser := CreateParser;
4234	>	Result := FParser
4235	>	end;
4236	>
4237	>	procedure TIBCustomDataSet.ResetParser;
4238	>	begin
4239	>	if assigned(FParser) then
4240	>	begin
4241	>	FParser.Free;
4242	>	FParser := nil;
4243	>	FQSelect.OnSQLChanged := nil; {Do not react to change}
4244	>	try
4245	>	FQSelect.SQL.Assign(FBaseSQLSelect);
4246	>	finally
4247	>	FQSelect.OnSQLChanged := SQLChanged;
4248	>	end;
4249	>	end;
4250	>	end;
4251	>
4252	>	function TIBCustomDataSet.HasParser: boolean;
4253	>	begin
4254	>	Result := not (csDesigning in ComponentState) and (FParser <> nil)
4255	>	end;
4256	>
4257	>	procedure TIBCustomDataSet.SetGenerateParamNames(AValue: Boolean);
4258	>	begin
4259	>	if FGenerateParamNames = AValue then Exit;
4260	>	FGenerateParamNames := AValue;
4261	>	Disconnect
4262	>	end;
4263	>
4264	>	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
4265	>	begin
4266	>	inherited InitRecord(Buffer);
4267	>	with PRecordData(Buffer)^ do
4268	>	begin
4269	>	rdUpdateStatus := TUpdateStatus(usInserted);
4270	>	rdBookMarkFlag := bfInserted;
4271	>	rdRecordNumber := -1;
4272	>	end;
4273	>	end;
4274	>
4275	>	procedure TIBCustomDataSet.InternalInsert;
4276	>	begin
4277	>	CursorPosChanged;
4278	>	end;
4279	>
4280	>	{ TIBDataSet IProviderSupport }
4281	>
4282	>	(*procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
4283	>	begin
4284	>	if Commit then
4285	>	Transaction.Commit else
4286	>	Transaction.Rollback;
4287	>	end;
4288	>
4289	>	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
4290	>	ResultSet: Pointer = nil): Integer;
4291	>	var
4292	>	FQuery: TIBQuery;
4293	>	begin
4294	>	if Assigned(ResultSet) then
4295	>	begin
4296	>	TDataSet(ResultSet^) := TIBQuery.Create(nil);
4297	>	with TIBQuery(ResultSet^) do
4298	>	begin
4299	>	SQL.Text := ASQL;
4300	>	Params.Assign(AParams);
4301	>	Open;
4302	>	Result := RowsAffected;
4303	>	end;
4304	>	end
4305	>	else
4306	>	begin
4307	>	FQuery := TIBQuery.Create(nil);
4308	>	try
4309	>	FQuery.Database := Database;
4310	>	FQuery.Transaction := Transaction;
4311	>	FQuery.GenerateParamNames := True;
4312	>	FQuery.SQL.Text := ASQL;
4313	>	FQuery.Params.Assign(AParams);
4314	>	FQuery.ExecSQL;
4315	>	Result := FQuery.RowsAffected;
4316	>	finally
4317	>	FQuery.Free;
4318	>	end;
4319	>	end;
4320	>	end;
4321	>
4322	>	function TIBCustomDataSet.PSGetQuoteChar: string;
4323	>	begin
4324	>	if Database.SQLDialect = 3 then
4325	>	Result := '"' else
4326	>	Result := '';
4327	>	end;
4328	>
4329	>	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
4330	>	var
4331	>	PrevErr: Integer;
4332	>	begin
4333	>	if Prev <> nil then
4334	>	PrevErr := Prev.ErrorCode else
4335	>	PrevErr := 0;
4336	>	if E is EIBError then
4337	>	with EIBError(E) do
4338	>	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
4339	>	Result := inherited PSGetUpdateException(E, Prev);
4340	>	end;
4341	>
4342	>	function TIBCustomDataSet.PSInTransaction: Boolean;
4343	>	begin
4344	>	Result := Transaction.InTransaction;
4345	>	end;
4346	>
4347	>	function TIBCustomDataSet.PSIsSQLBased: Boolean;
4348	>	begin
4349	>	Result := True;
4350	>	end;
4351	>
4352	>	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
4353	>	begin
4354	>	Result := True;
4355	>	end;
4356	>
4357	>	procedure TIBCustomDataSet.PSReset;
4358	>	begin
4359	>	inherited PSReset;
4360	>	if Active then
4361	>	begin
4362	>	Close;
4363	>	Open;
4364	>	end;
4365	>	end;
4366	>
4367	>	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
4368	>	var
4369	>	UpdateAction: TIBUpdateAction;
4370	>	SQL: string;
4371	>	Params: TParams;
4372	>
4373	>	procedure AssignParams(DataSet: TDataSet; Params: TParams);
4374	>	var
4375	>	I: Integer;
4376	>	Old: Boolean;
4377	>	Param: TParam;
4378	>	PName: string;
4379	>	Field: TField;
4380	>	Value: Variant;
4381	>	begin
4382	>	for I := 0 to Params.Count - 1 do
4383	>	begin
4384	>	Param := Params[I];
4385	>	PName := Param.Name;
4386	>	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
4387	>	if Old then System.Delete(PName, 1, 4);
4388	>	Field := DataSet.FindField(PName);
4389	>	if not Assigned(Field) then Continue;
4390	>	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
4391	>	begin
4392	>	Value := Field.NewValue;
4393	>	if VarIsEmpty(Value) then Value := Field.OldValue;
4394	>	Param.AssignFieldValue(Field, Value);
4395	>	end;
4396	>	end;
4397	>	end;
4398	>
4399	>	begin
4400	>	Result := False;
4401	>	if Assigned(OnUpdateRecord) then
4402	>	begin
4403	>	UpdateAction := uaFail;
4404	>	if Assigned(FOnUpdateRecord) then
4405	>	begin
4406	>	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
4407	>	Result := UpdateAction = uaApplied;
4408	>	end;
4409	>	end
4410	>	else if Assigned(FUpdateObject) then
4411	>	begin
4412	>	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
4413	>	if SQL <> '' then
4414	>	begin
4415	>	Params := TParams.Create;
4416	>	try
4417	>	Params.ParseSQL(SQL, True);
4418	>	AssignParams(Delta, Params);
4419	>	if PSExecuteStatement(SQL, Params) = 0 then
4420	>	IBError(ibxeNoRecordsAffected, [nil]);
4421	>	Result := True;
4422	>	finally
4423	>	Params.Free;
4424	>	end;
4425	>	end;
4426	>	end;
4427	>	end;
4428	>
4429	>	procedure TIBCustomDataSet.PSStartTransaction;
4430	>	begin
4431	>	ActivateConnection;
4432	>	Transaction.StartTransaction;
4433	>	end;
4434	>
4435	>	function TIBCustomDataSet.PSGetTableName: string;
4436	>	begin
4437	>	//  if not FInternalPrepared then
4438	>	//    InternalPrepare;
4439	>	{ It is possible for the FQSelectSQL to be unprepared
4440	>	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
4441	>	So check the Prepared of the SelectSQL instead }
4442	>	if not FQSelect.Prepared then
4443	>	FQSelect.Prepare;
4444	>	Result := FQSelect.UniqueRelationName;
4445	>	end;*)
4446	>
4447	>	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
4448	>	begin
4449	>	InternalBatchInput(InputObject);
4450	>	end;
4451	>
4452	>	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
4453	>	begin
4454	>	InternalBatchOutput(OutputObject);
4455	>	end;
4456	>
4457	>	procedure TIBDataSet.ExecSQL;
4458	>	begin
4459	>	InternalExecQuery;
4460	>	end;
4461	>
4462	>	procedure TIBDataSet.Prepare;
4463	>	begin
4464	>	InternalPrepare;
4465	>	end;
4466	>
4467	>	procedure TIBDataSet.UnPrepare;
4468	>	begin
4469	>	InternalUnPrepare;
4470	>	end;
4471	>
4472	>	function TIBDataSet.GetPrepared: Boolean;
4473	>	begin
4474	>	Result := InternalPrepared;
4475	>	end;
4476	>
4477	>	procedure TIBDataSet.InternalOpen;
4478	>	begin
4479	>	ActivateConnection;
4480	>	ActivateTransaction;
4481	>	InternalSetParamsFromCursor;
4482	>	Inherited InternalOpen;
4483	>	end;
4484	>
4485	>	procedure TIBDataSet.SetFiltered(Value: Boolean);
4486	>	begin
4487	>	if(Filtered <> Value) then
4488	>	begin
4489	>	inherited SetFiltered(value);
4490	>	if Active then
4491	>	begin
4492	>	Close;
4493	>	Open;
4494	>	end;
4495	>	end
4496	>	else
4497	>	inherited SetFiltered(value);
4498	>	end;
4499	>
4500	>	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
4501	>	begin
4502	>	Result := false;
4503	>	if not Assigned(Bookmark) then
4504	>	exit;
4505	>	Result := PInteger(Bookmark)^ < FRecordCount;
4506	>	end;
4507	>
4508	>	function TIBCustomDataSet.GetFieldData(Field: TField;
4509	>	Buffer: Pointer): Boolean;
4510	>	{$IFDEF TBCDFIELD_IS_BCD}
4511	>	var
4512	>	lTempCurr : System.Currency;
4513	>	begin
4514	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4515	>	begin
4516	>	Result := InternalGetFieldData(Field, @lTempCurr);
4517	>	if Result then
4518	>	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
4519	>	end
4520	>	else
4521	>	{$ELSE}
4522	>	begin
4523	>	{$ENDIF}
4524	>	Result := InternalGetFieldData(Field, Buffer);
4525	>	end;
4526	>
4527	>	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
4528	>	NativeFormat: Boolean): Boolean;
4529	>	begin
4530	>	if (Field.DataType = ftBCD) and not NativeFormat then
4531	>	Result := InternalGetFieldData(Field, Buffer)
4532	>	else
4533	>	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
4534	>	end;
4535	>
4536	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
4537	>	{$IFDEF TDBDFIELD_IS_BCD}
4538	>	var
4539	>	lTempCurr : System.Currency;
4540	>	begin
4541	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4542	>	begin
4543	>	BCDToCurr(TBCD(Buffer^), lTempCurr);
4544	>	InternalSetFieldData(Field, @lTempCurr);
4545	>	end
4546	>	else
4547	>	{$ELSE}
4548	>	begin
4549	>	{$ENDIF}
4550	>	InternalSetFieldData(Field, Buffer);
4551	>	end;
4552	>
4553	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
4554	>	NativeFormat: Boolean);
4555	>	begin
4556	>	if (not NativeFormat) and (Field.DataType = ftBCD) then
4557	>	InternalSetfieldData(Field, Buffer)
4558	>	else
4559	>	inherited SetFieldData(Field, buffer, NativeFormat);
4560	>	end;
4561	>
4562	>	{ TIBDataSetUpdateObject }
4563	>
4564	>	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
4565	>	begin
4566	>	inherited Create(AOwner);
4567	>	FRefreshSQL := TStringList.Create;
4568	>	end;
4569	>
4570	>	destructor TIBDataSetUpdateObject.Destroy;
4571	>	begin
4572	>	FRefreshSQL.Free;
4573	>	inherited Destroy;
4574	>	end;
4575	>
4576	>	procedure TIBDataSetUpdateObject.SetRefreshSQL(Value: TStrings);
4577	>	begin
4578	>	FRefreshSQL.Assign(Value);
4579	>	end;
4580	>
4581	>	procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
4582	>	begin
4583	>	if not Assigned(DataSet) then Exit;
4584	>	DataSet.SetInternalSQLParams(Query, buff);
4585	>	end;
4586	>
4587	>	function TIBDSBlobStream.GetSize: Int64;
4588	>	begin
4589	>	Result := FBlobStream.BlobSize;
4590	>	end;
4591	>
4592	>	{ TIBDSBlobStream }
4593	>	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
4594	>	Mode: TBlobStreamMode);
4595	>	begin
4596	>	FField := AField;
4597	>	FBlobStream := ABlobStream;
4598	>	FBlobStream.Seek(0, soFromBeginning);
4599	>	if (Mode = bmWrite) then
4600	>	begin
4601	>	FBlobStream.Truncate;
4602	>	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4603	>	TBlobField(FField).Modified := true;
4604	>	FHasWritten := true;
4605	>	end;
4606	>	end;
4607	>
4608	>	destructor TIBDSBlobStream.Destroy;
4609	>	begin
4610	>	if FHasWritten then
4611	>	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4612	>	inherited Destroy;
4613	>	end;
4614	>
4615	>	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
4616	>	begin
4617	>	result := FBlobStream.Read(Buffer, Count);
4618	>	end;
4619	>
4620	>	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
4621	>	begin
4622	>	result := FBlobStream.Seek(Offset, Origin);
4623	>	end;
4624	>
4625	>	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
4626	>	begin
4627	>	FBlobStream.SetSize(NewSize);
4628	>	end;
4629	>
4630	>	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
4631	>	begin
4632	>	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
4633	>	IBError(ibxeNotEditing, [nil]);
4634	>	TIBCustomDataSet(FField.DataSet).RecordModified(True);
4635	>	TBlobField(FField).Modified := true;
4636	>	result := FBlobStream.Write(Buffer, Count);
4637	>	FHasWritten := true;
4638	>	{  TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
4639	>	Removed as this caused a seek to beginning of the blob stream thus corrupting
4640	>	the blob stream. Moved to the destructor i.e. called after blob written}
4641	>	end;
4642	>
4643	>	{ TIBGenerator }
4644	>
4645	>	procedure TIBGenerator.SetIncrement(const AValue: integer);
4646	>	begin
4647	>	if AValue < 0 then
4648	>	raise Exception.Create('A Generator Increment cannot be negative');
4649	>	FIncrement := AValue
4650	>	end;
4651	>
4652	>	function TIBGenerator.GetNextValue(ADatabase: TIBDatabase;
4653	>	ATransaction: TIBTransaction): integer;
4654	>	begin
4655	>	with TIBSQL.Create(nil) do
4656	>	try
4657	>	Database := ADatabase;
4658	>	Transaction := ATransaction;
4659	>	if not assigned(Database) then
4660	>	IBError(ibxeCannotSetDatabase,[]);
4661	>	if not assigned(Transaction) then
4662	>	IBError(ibxeCannotSetTransaction,[]);
4663	>	with Transaction do
4664	>	if not InTransaction then StartTransaction;
4665	>	SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]);
4666	>	Prepare;
4667	>	ExecQuery;
4668	>	try
4669	>	Result := FieldByName('ID').AsInteger
4670	>	finally
4671	>	Close
4672	>	end;
4673	>	finally
4674	>	Free
4675	>	end;
4676	>	end;
4677	>
4678	>	constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
4679	>	begin
4680	>	FOwner := Owner;
4681	>	FIncrement := 1;
4682	>	end;
4683	>
4684	>
4685	>	procedure TIBGenerator.Apply;
4686	>	begin
4687	>	if (FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then
4688	>	Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction);
4689	>	end;
4690	>
4691	>
4692	>	end.

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