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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 101 by tony, Thu Jan 18 14:37:18 2018 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	>	{$R-}
37	>
38	>	{$IFDEF FPC}
39	>	{$Mode Delphi}
40	>	{$codepage UTF8}
41	>	{$ENDIF}
42	>
43	>	{$IFDEF DELPHI}
44	>	{$DEFINE TDBDFIELD_IS_BCD}
45	>	{$ENDIF}
46	>
47	>	interface
48	>
49	>	uses
50	>	{$IFDEF WINDOWS }
51	>	Windows,
52	>	{$ELSE}
53	>	unix,
54	>	{$ENDIF}
55	>	SysUtils, Classes, IBDatabase, IBExternals, IB,  IBSQL, Db,
56	>	IBUtils, IBBlob, IBSQLParser, IBDatabaseInfo;
57	>
58	>	const
59	>	BufferCacheSize    =  1000;  { Allocate cache in this many record chunks}
60	>	UniCache           =  2;     { Uni-directional cache is 2 records big }
61	>
62	>	type
63	>	TIBCustomDataSet = class;
64	>	TIBDataSet = class;
65	>
66	>	{ TIBDataSetUpdateObject }
67	>
68	>	TIBDataSetUpdateObject = class(TComponent)
69	>	private
70	>	FRefreshSQL: TStrings;
71	>	procedure SetRefreshSQL(value: TStrings);
72	>	protected
73	>	function GetDataSet: TIBCustomDataSet; virtual; abstract;
74	>	procedure SetDataSet(ADataSet: TIBCustomDataSet); virtual; abstract;
75	>	procedure Apply(UpdateKind: TUpdateKind; buff: PChar); virtual; abstract;
76	>	function GetSQL(UpdateKind: TUpdateKind): TStrings; virtual; abstract;
77	>	procedure InternalSetParams(Params: ISQLParams; buff: PChar); overload;
78	>	procedure InternalSetParams(Query: TIBSQL; buff: PChar); overload;
79	>	procedure UpdateRecordFromQuery(QryResults: IResults; Buffer: PChar);
80	>	property DataSet: TIBCustomDataSet read GetDataSet write SetDataSet;
81	>	public
82	>	constructor Create(AOwner: TComponent); override;
83	>	destructor Destroy; override;
84	>	published
85	>	property RefreshSQL: TStrings read FRefreshSQL write SetRefreshSQL;
86	>	end;
87	>
88	>	TBlobDataArray = array[0..0] of TIBBlobStream;
89	>	PBlobDataArray = ^TBlobDataArray;
90	>	TIBArrayField = class;
91	>
92	>	{ TIBArray }
93	>
94	>	{Wrapper class to support array cache in TIBCustomDataset and event handling}
95	>
96	>	TIBArray = class
97	>	private
98	>	FArray: IArray;
99	>	FRecNo: integer;
100	>	FField: TIBArrayField;
101	>	procedure EventHandler(Sender: IArray; Reason: TArrayEventReason);
102	>	public
103	>	constructor Create(aField: TIBArrayField; anArray: IArray);
104	>	destructor Destroy; override;
105	>	property ArrayIntf: IArray read FArray;
106	>	end;
107	>
108	>	TArrayDataArray = array [0..0] of TIBArray;
109	>	PArrayDataArray = ^TArrayDataArray;
110	>
111	>	{ TIBCustomDataSet }
112	>
113	>	TCachedUpdateStatus = (
114	>	cusUnmodified, cusModified, cusInserted,
115	>	cusDeleted, cusUninserted
116	>	);
117	>	TIBDBKey = record
118	>	DBKey: array[0..7] of Byte;
119	>	end;
120	>	PIBDBKey = ^TIBDBKey;
121	>
122	>	PFieldData = ^TFieldData;
123	>	TFieldData = record
124	>	fdIsNull: Boolean;
125	>	fdDataLength: Short;
126	>	end;
127	>
128	>	PColumnData = ^TColumnData;
129	>	TColumnData = record
130	>	fdDataType: Short;
131	>	fdDataScale: Short;
132	>	fdNullable: Boolean;
133	>	fdDataSize: Short;
134	>	fdDataOfs: Integer;
135	>	fdCodePage: TSystemCodePage;
136	>	end;
137	>
138	>	PFieldColumns = ^TFieldColumns;
139	>	TFieldColumns =  array[1..1] of TColumnData;
140	>
141	>	TRecordData = record
142	>	rdBookmarkFlag: TBookmarkFlag;
143	>	rdFieldCount: Short;
144	>	rdRecordNumber: Integer;
145	>	rdCachedUpdateStatus: TCachedUpdateStatus;
146	>	rdUpdateStatus: TUpdateStatus;
147	>	rdSavedOffset: DWORD;
148	>	rdDBKey: TIBDBKey;
149	>	rdFields: array[1..1] of TFieldData;
150	>	end;
151	>	PRecordData = ^TRecordData;
152	>
153	>	{ TIBArrayField }
154	>
155	>	TIBArrayField = class(TField)
156	>	private
157	>	FArrayBounds: TArrayBounds;
158	>	FArrayDimensions: integer;
159	>	FRelationName: string;
160	>	FCacheOffset: word;
161	>	function GetArrayID: TISC_QUAD;
162	>	function GetArrayIntf: IArray;
163	>	procedure SetArrayIntf(AValue: IArray);
164	>	protected
165	>	class procedure CheckTypeSize(AValue: Longint); override;
166	>	function GetAsString: string; override;
167	>	function GetDataSize: Integer; override;
168	>	procedure Bind(Binding: Boolean); override;
169	>	public
170	>	constructor Create(AOwner: TComponent); override;
171	>	function CreateArray: IArray;
172	>	property ArrayID: TISC_QUAD read GetArrayID;
173	>	property ArrayIntf: IArray read GetArrayIntf write SetArrayIntf;
174	>	property ArrayDimensions: integer read FArrayDimensions write FArrayDimensions;
175	>	property ArrayBounds: TArrayBounds read FArrayBounds write FArrayBounds;
176	>	end;
177	>
178	>	{ TIBStringField allows us to have strings longer than 8196 }
179	>
180	>	TIBStringField = class(TStringField)
181	>	private
182	>	FCharacterSetName: RawByteString;
183	>	FCharacterSetSize: integer;
184	>	FAutoFieldSize: boolean;
185	>	FCodePage: TSystemCodePage;
186	>	FDataSize: integer;
187	>	protected
188	>	procedure Bind(Binding: Boolean); override;
189	>	function GetDataSize: Integer; override;
190	>	public
191	>	constructor Create(aOwner: TComponent); override;
192	>	class procedure CheckTypeSize(Value: Integer); override;
193	>	function GetAsString: string; override;
194	>	function GetAsVariant: Variant; override;
195	>	function GetValue(var Value: string): Boolean;
196	>	procedure SetAsString(const Value: string); override;
197	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
198	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
199	>	property CodePage: TSystemCodePage read FCodePage write FCodePage;
200	>	published
201	>	property AutoFieldSize: boolean read FAutoFieldSize write FAutoFieldSize default true;
202	>	end;
203	>
204	>	{ TIBBCDField }
205	>	{  Actually, there is no BCD involved in this type,
206	>	instead it deals with currency types.
207	>	In IB, this is an encapsulation of Numeric (x, y)
208	>	where x < 18 and y <= 4.
209	>	Note: y > 4 will default to Floats
210	>	}
211	>	TIBBCDField = class(TBCDField)
212	>	private
213	>	FIdentityColumn: boolean;
214	>	protected
215	>	procedure Bind(Binding: Boolean); override;
216	>	class procedure CheckTypeSize(Value: Integer); override;
217	>	function GetAsCurrency: Currency; override;
218	>	function GetAsString: string; override;
219	>	function GetAsVariant: Variant; override;
220	>	function GetDataSize: Integer; override;
221	>	public
222	>	constructor Create(AOwner: TComponent); override;
223	>	property IdentityColumn: boolean read FIdentityColumn;
224	>	published
225	>	property Size default 8;
226	>	end;
227	>
228	>	{The following integer field types extend the built in versions to enable IBX appplications
229	>	to check for an Identity column}
230	>
231	>	{ TIBSmallintField }
232	>
233	>	TIBSmallintField = class(TSmallintField)
234	>	private
235	>	FIdentityColumn: boolean;
236	>	protected
237	>	procedure Bind(Binding: Boolean); override;
238	>	public
239	>	property IdentityColumn: boolean read FIdentityColumn;
240	>	end;
241	>
242	>	{ TIBIntegerField }
243	>
244	>	TIBIntegerField = class(TIntegerField)
245	>	private
246	>	FIdentityColumn: boolean;
247	>	protected
248	>	procedure Bind(Binding: Boolean); override;
249	>	public
250	>	property IdentityColumn: boolean read FIdentityColumn;
251	>	end;
252	>
253	>	{ TIBLargeIntField }
254	>
255	>	TIBLargeIntField = class(TLargeIntField)
256	>	private
257	>	FIdentityColumn: boolean;
258	>	protected
259	>	procedure Bind(Binding: Boolean); override;
260	>	public
261	>	property IdentityColumn: boolean read FIdentityColumn;
262	>	end;
263	>
264	>	{TIBMemoField}
265	>	{Allows us to show truncated text in DBGrids and anything else that uses
266	>	DisplayText}
267	>
268	>	TIBMemoField = class(TMemoField)
269	>	private
270	>	FCharacterSetName: RawByteString;
271	>	FCharacterSetSize: integer;
272	>	FDisplayTextAsClassName: boolean;
273	>	function GetTruncatedText: string;
274	>	protected
275	>	procedure Bind(Binding: Boolean); override;
276	>	function GetAsString: string; override;
277	>	function GetDefaultWidth: Longint; override;
278	>	procedure GetText(var AText: string; ADisplayText: Boolean); override;
279	>	procedure SetAsString(const AValue: string); override;
280	>	public
281	>	constructor Create(AOwner: TComponent); override;
282	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
283	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
284	>	published
285	>	property DisplayTextAsClassName: boolean read FDisplayTextAsClassName
286	>	write FDisplayTextAsClassName;
287	>	private
288	>	FCodePage: TSystemCodePage;
289	>	FFCodePage: TSystemCodePage;
290	>	public
291	>	property CodePage: TSystemCodePage read FFCodePage write FFCodePage;
292	>	end;
293	>
294	>	TIBDataLink = class(TDetailDataLink)
295	>	private
296	>	FDataSet: TIBCustomDataSet;
297	>	protected
298	>	procedure ActiveChanged; override;
299	>	procedure RecordChanged(Field: TField); override;
300	>	function GetDetailDataSet: TDataSet; override;
301	>	procedure CheckBrowseMode; override;
302	>	public
303	>	constructor Create(ADataSet: TIBCustomDataSet);
304	>	destructor Destroy; override;
305	>	end;
306	>
307	>	TIBGeneratorApplyOnEvent = (gaeOnNewRecord,gaeOnPostRecord);
308	>
309	>	{ TIBGenerator }
310	>
311	>	TIBGenerator = class(TPersistent)
312	>	private
313	>	FOwner: TIBCustomDataSet;
314	>	FApplyOnEvent: TIBGeneratorApplyOnEvent;
315	>	FFieldName: string;
316	>	FGeneratorName: string;
317	>	FIncrement: integer;
318	>	procedure SetIncrement(const AValue: integer);
319	>	protected
320	>	function GetNextValue(ADatabase: TIBDatabase; ATransaction: TIBTransaction): integer;
321	>	public
322	>	constructor Create(Owner: TIBCustomDataSet);
323	>	procedure Apply;
324	>	property Owner: TIBCustomDataSet read FOwner;
325	>	published
326	>	property Generator: string read FGeneratorName write FGeneratorName;
327	>	property Field: string read FFieldName write FFieldName;
328	>	property Increment: integer read FIncrement write SetIncrement default 1;
329	>	property ApplyOnEvent: TIBGeneratorApplyOnEvent read FApplyOnEvent write FApplyOnEvent;
330	>	end;
331	>
332	>	{TIBControlLink - Allows IB Aware controls to react to dataset state changes}
333	>
334	>	TIBControlLink = class
335	>	private
336	>	FTIBDataSet: TIBCustomDataSet;
337	>	procedure SetIBDataSet(AValue: TIBCustomDataSet);
338	>	protected
339	>	procedure UpdateSQL(Sender: TObject); virtual;
340	>	procedure UpdateParams(Sender: TObject); virtual;
341	>	public
342	>	destructor Destroy; override;
343	>	property IBDataSet: TIBCustomDataSet read FTIBDataSet write SetIBDataSet;
344	>	end;
345	>
346	>	TIBAutoCommit = (acDisabled, acCommitRetaining);
347	>
348	>	{ TIBCustomDataSet }
349	>
350	>	TIBUpdateAction = (uaFail, uaAbort, uaSkip, uaRetry, uaApply, uaApplied);
351	>
352	>	TIBUpdateErrorEvent = procedure(DataSet: TDataSet; E: EDatabaseError;
353	>	UpdateKind: TUpdateKind; var TheUpdateAction: TIBUpdateAction)
354	>	of object;
355	>	TIBUpdateRecordEvent = procedure(DataSet: TDataSet; UpdateKind: TUpdateKind;
356	>	var UpdateAction: TIBUpdateAction) of object;
357	>
358	>	TIBUpdateRecordTypes = set of TCachedUpdateStatus;
359	>
360	>	TDataSetCloseAction = (dcDiscardChanges, dcSaveChanges);
361	>
362	>	TOnValidatePost = procedure (Sender: TObject; var CancelPost: boolean) of object;
363	>
364	>	TIBCustomDataSet = class(TDataset)
365	>	private
366	>	FAllowAutoActivateTransaction: Boolean;
367	>	FArrayFieldCount: integer;
368	>	FArrayCacheOffset: integer;
369	>	FAutoCommit: TIBAutoCommit;
370	>	FGenerateParamNames: Boolean;
371	>	FGeneratorField: TIBGenerator;
372	>	FNeedsRefresh: Boolean;
373	>	FForcedRefresh: Boolean;
374	>	FDidActivate: Boolean;
375	>	FBase: TIBBase;
376	>	FBlobCacheOffset: Integer;
377	>	FBlobStreamList: TList;
378	>	FArrayList: TList;
379	>	FBufferChunks: Integer;
380	>	FBufferCache,
381	>	FOldBufferCache: PChar;
382	>	FBufferChunkSize,
383	>	FCacheSize,
384	>	FOldCacheSize: Integer;
385	>	FFilterBuffer: PChar;
386	>	FBPos,
387	>	FOBPos,
388	>	FBEnd,
389	>	FOBEnd: DWord;
390	>	FCachedUpdates: Boolean;
391	>	FCalcFieldsOffset: Integer;
392	>	FCurrentRecord: Long;
393	>	FDeletedRecords: Long;
394	>	FModelBuffer,
395	>	FOldBuffer: PChar;
396	>	FOnValidatePost: TOnValidatePost;
397	>	FOpen: Boolean;
398	>	FInternalPrepared: Boolean;
399	>	FQDelete,
400	>	FQInsert,
401	>	FQRefresh,
402	>	FQSelect,
403	>	FQModify: TIBSQL;
404	>	FDatabaseInfo: TIBDatabaseInfo;
405	>	FRecordBufferSize: Integer;
406	>	FRecordCount: Integer;
407	>	FRecordSize: Integer;
408	>	FDataSetCloseAction: TDataSetCloseAction;
409	>	FUniDirectional: Boolean;
410	>	FUpdateMode: TUpdateMode;
411	>	FUpdateObject: TIBDataSetUpdateObject;
412	>	FParamCheck: Boolean;
413	>	FUpdatesPending: Boolean;
414	>	FUpdateRecordTypes: TIBUpdateRecordTypes;
415	>	FMappedFieldPosition: array of Integer;
416	>	FDataLink: TIBDataLink;
417	>
418	>	FBeforeDatabaseDisconnect,
419	>	FAfterDatabaseDisconnect,
420	>	FDatabaseFree: TNotifyEvent;
421	>	FOnUpdateError: TIBUpdateErrorEvent;
422	>	FOnUpdateRecord: TIBUpdateRecordEvent;
423	>	FBeforeTransactionEnd,
424	>	FAfterTransactionEnd,
425	>	FTransactionFree: TNotifyEvent;
426	>	FAliasNameMap: array of string;
427	>	FAliasNameList: array of string;
428	>	FBaseSQLSelect: TStrings;
429	>	FParser: TSelectSQLParser;
430	>	FCloseAction: TTransactionAction;
431	>	FInTransactionEnd: boolean;
432	>	FIBLinks: TList;
433	>	FFieldColumns: PFieldColumns;
434	>	procedure ColumnDataToBuffer(QryResults: IResults; ColumnIndex,
435	>	FieldIndex: integer; Buffer: PChar);
436	>	procedure InitModelBuffer(Qry: TIBSQL; Buffer: PChar);
437	>	function GetSelectStmtIntf: IStatement;
438	>	procedure SetUpdateMode(const Value: TUpdateMode);
439	>	procedure SetUpdateObject(Value: TIBDataSetUpdateObject);
440	>
441	>	function AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode): TGetResult;
442	>	procedure AdjustRecordOnInsert(Buffer: Pointer);
443	>	function CanEdit: Boolean;
444	>	function CanInsert: Boolean;
445	>	function CanDelete: Boolean;
446	>	function CanRefresh: Boolean;
447	>	procedure CheckEditState;
448	>	procedure ClearBlobCache;
449	>	procedure ClearArrayCache;
450	>	procedure ClearIBLinks;
451	>	procedure CopyRecordBuffer(Source, Dest: Pointer);
452	>	procedure DoBeforeDatabaseDisconnect(Sender: TObject);
453	>	procedure DoAfterDatabaseDisconnect(Sender: TObject);
454	>	procedure DoDatabaseFree(Sender: TObject);
455	>	procedure DoBeforeTransactionEnd(Sender: TObject; Action: TTransactionAction);
456	>	procedure DoAfterTransactionEnd(Sender: TObject);
457	>	procedure DoTransactionFree(Sender: TObject);
458	>	procedure FetchCurrentRecordToBuffer(Qry: TIBSQL; RecordNumber: Integer;
459	>	Buffer: PChar);
460	>	function GetDatabase: TIBDatabase;
461	>	function GetDeleteSQL: TStrings;
462	>	function GetInsertSQL: TStrings;
463	>	function GetSQLParams: ISQLParams;
464	>	function GetRefreshSQL: TStrings;
465	>	function GetSelectSQL: TStrings;
466	>	function GetStatementType: TIBSQLStatementTypes;
467	>	function GetModifySQL: TStrings;
468	>	function GetTransaction: TIBTransaction;
469	>	function GetParser: TSelectSQLParser;
470	>	procedure InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer); virtual;
471	>	function InternalLocate(const KeyFields: string; const KeyValues: Variant;
472	>	Options: TLocateOptions): Boolean; virtual;
473	>	procedure InternalPostRecord(Qry: TIBSQL; Buff: Pointer); virtual;
474	>	procedure InternalRevertRecord(RecordNumber: Integer); virtual;
475	>	function IsVisible(Buffer: PChar): Boolean;
476	>	procedure RegisterIBLink(Sender: TIBControlLink);
477	>	procedure UnRegisterIBLink(Sender: TIBControlLink);
478	>	procedure SaveOldBuffer(Buffer: PChar);
479	>	procedure SetBufferChunks(Value: Integer);
480	>	procedure SetDatabase(Value: TIBDatabase);
481	>	procedure SetDeleteSQL(Value: TStrings);
482	>	procedure SetInsertSQL(Value: TStrings);
483	>	procedure SetInternalSQLParams(Params: ISQLParams; Buffer: Pointer);
484	>	procedure SetRefreshSQL(Value: TStrings);
485	>	procedure SetSelectSQL(Value: TStrings);
486	>	procedure SetModifySQL(Value: TStrings);
487	>	procedure SetTransaction(Value: TIBTransaction);
488	>	procedure SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
489	>	procedure SetUniDirectional(Value: Boolean);
490	>	procedure UpdateRecordFromQuery(QryResults: IResults; Buffer: PChar);
491	>	procedure RefreshParams;
492	>	function AdjustPosition(FCache: PChar; Offset: DWORD;
493	>	Origin: Integer): DWORD;
494	>	procedure ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
495	>	Buffer: PChar);
496	>	procedure ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
497	>	ReadOldBuffer: Boolean);
498	>	procedure WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
499	>	Buffer: PChar);
500	>	procedure WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
501	>	function InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
502	>	DoCheck: Boolean): TGetResult; virtual;
503	>
504	>	protected
505	>	procedure ActivateConnection;
506	>	function ActivateTransaction: Boolean;
507	>	procedure DeactivateTransaction;
508	>	procedure CheckDatasetClosed;
509	>	procedure CheckDatasetOpen;
510	>	function CreateParser: TSelectSQLParser; virtual;
511	>	procedure FieldDefsFromQuery(SourceQuery: TIBSQL);
512	>	function GetActiveBuf: PChar;
513	>	procedure InternalBatchInput(InputObject: TIBBatchInput); virtual;
514	>	procedure InternalBatchOutput(OutputObject: TIBBatchOutput); virtual;
515	>	procedure InternalPrepare; virtual;
516	>	procedure InternalUnPrepare; virtual;
517	>	procedure InternalExecQuery; virtual;
518	>	procedure InternalRefreshRow; virtual;
519	>	procedure InternalSetParamsFromCursor; virtual;
520	>	procedure CheckNotUniDirectional;
521	>	procedure SQLChanging(Sender: TObject); virtual;
522	>	procedure SQLChanged(Sender: TObject); virtual;
523	>
524	>	{ IProviderSupport }
525	>	procedure PSEndTransaction(Commit: Boolean); override;
526	>	function PSExecuteStatement(const ASQL: string; AParams: TParams;
527	>	ResultSet: Pointer = nil): Integer; override;
528	>	function PsGetTableName: string; override;
529	>	function PSGetQuoteChar: string; override;
530	>	function PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError; override;
531	>	function PSInTransaction: Boolean; override;
532	>	function PSIsSQLBased: Boolean; override;
533	>	function PSIsSQLSupported: Boolean; override;
534	>	procedure PSStartTransaction; override;
535	>	procedure PSReset; override;
536	>	function PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean; override;
537	>
538	>	{ TDataSet support }
539	>	procedure InternalInsert; override;
540	>	procedure InitRecord(Buffer: PChar); override;
541	>	procedure Disconnect; virtual;
542	>	function ConstraintsStored: Boolean;
543	>	procedure ClearCalcFields(Buffer: PChar); override;
544	>	function AllocRecordBuffer: PChar; override;
545	>	procedure DoBeforeDelete; override;
546	>	procedure DoAfterDelete; override;
547	>	procedure DoBeforeEdit; override;
548	>	procedure DoAfterEdit; override;
549	>	procedure DoBeforeInsert; override;
550	>	procedure DoAfterInsert; override;
551	>	procedure DoBeforeClose; override;
552	>	procedure DoBeforeOpen; override;
553	>	procedure DoBeforePost; override;
554	>	procedure DoAfterPost; override;
555	>	procedure FreeRecordBuffer(var Buffer: PChar); override;
556	>	procedure GetBookmarkData(Buffer: PChar; Data: Pointer); override;
557	>	function GetBookmarkFlag(Buffer: PChar): TBookmarkFlag; override;
558	>	function GetCanModify: Boolean; override;
559	>	function GetDataSource: TDataSource; override;
560	>	function GetDBAliasName(FieldNo: integer): string;
561	>	function GetFieldDefFromAlias(aliasName: string): TFieldDef;
562	>	function GetFieldClass(FieldType: TFieldType): TFieldClass; override;
563	>	function GetRecNo: Integer; override;
564	>	function GetRecord(Buffer: PChar; GetMode: TGetMode;
565	>	DoCheck: Boolean): TGetResult; override;
566	>	function GetRecordCount: Integer; override;
567	>	function GetRecordSize: Word; override;
568	>	procedure InternalAutoCommit;
569	>	procedure InternalAddRecord(Buffer: Pointer; Append: Boolean); override;
570	>	procedure InternalCancel; override;
571	>	procedure InternalClose; override;
572	>	procedure InternalDelete; override;
573	>	procedure InternalFirst; override;
574	>	function InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean; virtual;
575	>	procedure InternalGotoBookmark(Bookmark: Pointer); override;
576	>	procedure InternalHandleException; override;
577	>	procedure InternalInitFieldDefs; override;
578	>	procedure InternalInitRecord(Buffer: PChar); override;
579	>	procedure InternalLast; override;
580	>	procedure InternalOpen; override;
581	>	procedure InternalPost; override;
582	>	procedure InternalRefresh; override;
583	>	procedure InternalSetFieldData(Field: TField; Buffer: Pointer); virtual;
584	>	procedure InternalSetToRecord(Buffer: PChar); override;
585	>	function IsCursorOpen: Boolean; override;
586	>	procedure Loaded; override;
587	>	procedure ReQuery;
588	>	procedure SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag); override;
589	>	procedure SetBookmarkData(Buffer: PChar; Data: Pointer); override;
590	>	procedure SetCachedUpdates(Value: Boolean);
591	>	procedure SetDataSource(Value: TDataSource);
592	>	procedure SetGenerateParamNames(AValue: Boolean); virtual;
593	>	procedure SetFieldData(Field : TField; Buffer : Pointer); override;
594	>	procedure SetFieldData(Field : TField; Buffer : Pointer;
595	>	NativeFormat : Boolean); overload; override;
596	>	procedure SetRecNo(Value: Integer); override;
597	>
598	>	protected
599	>	{Likely to be made public by descendant classes}
600	>	property AutoCommit: TIBAutoCommit read FAutoCommit write FAutoCommit default acDisabled;
601	>	property SQLParams: ISQLParams read GetSQLParams;
602	>	property Params: ISQLParams read GetSQLParams;
603	>	property InternalPrepared: Boolean read FInternalPrepared;
604	>	property QDelete: TIBSQL read FQDelete;
605	>	property QInsert: TIBSQL read FQInsert;
606	>	property QRefresh: TIBSQL read FQRefresh;
607	>	property QSelect: TIBSQL read FQSelect;
608	>	property QModify: TIBSQL read FQModify;
609	>	property StatementType: TIBSQLStatementTypes read GetStatementType;
610	>	property SelectStmtHandle: IStatement read GetSelectStmtIntf;
611	>
612	>	{Likely to be made published by descendant classes}
613	>	property BufferChunks: Integer read FBufferChunks write SetBufferChunks;
614	>	property CachedUpdates: Boolean read FCachedUpdates write SetCachedUpdates;
615	>	property UniDirectional: Boolean read FUniDirectional write SetUniDirectional default False;
616	>	property GeneratorField: TIBGenerator read FGeneratorField write FGeneratorField;
617	>	property DeleteSQL: TStrings read GetDeleteSQL write SetDeleteSQL;
618	>	property InsertSQL: TStrings read GetInsertSQL write SetInsertSQL;
619	>	property RefreshSQL: TStrings read GetRefreshSQL write SetRefreshSQL;
620	>	property SelectSQL: TStrings read GetSelectSQL write SetSelectSQL;
621	>	property ModifySQL: TStrings read GetModifySQL write SetModifySQL;
622	>	property UpdateMode: TUpdateMode read FUpdateMode write SetUpdateMode default upWhereAll;
623	>	property ParamCheck: Boolean read FParamCheck write FParamCheck default True;
624	>	property Parser: TSelectSQLParser read GetParser;
625	>	property BaseSQLSelect: TStrings read FBaseSQLSelect;
626	>
627	>	property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
628	>	write FBeforeDatabaseDisconnect;
629	>	property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
630	>	write FAfterDatabaseDisconnect;
631	>	property DatabaseFree: TNotifyEvent read FDatabaseFree
632	>	write FDatabaseFree;
633	>	property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
634	>	write FBeforeTransactionEnd;
635	>	property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
636	>	write FAfterTransactionEnd;
637	>	property TransactionFree: TNotifyEvent read FTransactionFree
638	>	write FTransactionFree;
639	>	property OnValidatePost: TOnValidatePost read FOnValidatePost write FOnValidatePost;
640	>
641	>	public
642	>	constructor Create(AOwner: TComponent); override;
643	>	destructor Destroy; override;
644	>	procedure ApplyUpdates;
645	>	function CachedUpdateStatus: TCachedUpdateStatus;
646	>	procedure CancelUpdates;
647	>	function GetFieldPosition(AliasName: string): integer;
648	>	procedure FetchAll;
649	>	function LocateNext(const KeyFields: string; const KeyValues: Variant;
650	>	Options: TLocateOptions): Boolean;
651	>	procedure RecordModified(Value: Boolean);
652	>	procedure RevertRecord;
653	>	procedure Undelete;
654	>	procedure ResetParser; virtual;
655	>	function HasParser: boolean;
656	>
657	>	{ TDataSet support methods }
658	>	function BookmarkValid(Bookmark: TBookmark): Boolean; override;
659	>	function CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer; override;
660	>	function CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream; override;
661	>	function GetArray(Field: TIBArrayField): IArray;
662	>	procedure SetArrayIntf(AnArray: IArray; Field: TIBArrayField);
663	>	function GetCurrentRecord(Buffer: PChar): Boolean; override;
664	>	function GetFieldData(Field : TField; Buffer : Pointer) : Boolean; overload; override;
665	>	function GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean; overload; (*override;*)
666	>	function GetFieldData(Field : TField; Buffer : Pointer;
667	>	NativeFormat : Boolean) : Boolean; overload; override;
668	>	property GenerateParamNames: Boolean read FGenerateParamNames write SetGenerateParamNames;
669	>	function Locate(const KeyFields: string; const KeyValues: Variant;
670	>	Options: TLocateOptions): Boolean; override;
671	>	function Lookup(const KeyFields: string; const KeyValues: Variant;
672	>	const ResultFields: string): Variant; override;
673	>	function UpdateStatus: TUpdateStatus; override;
674	>	function IsSequenced: Boolean; override;
675	>	procedure Post; override;
676	>	function ParamByName(ParamName: String): ISQLParam;
677	>	property ArrayFieldCount: integer read FArrayFieldCount;
678	>	property UpdateObject: TIBDataSetUpdateObject read FUpdateObject write SetUpdateObject;
679	>	property UpdatesPending: Boolean read FUpdatesPending;
680	>	property UpdateRecordTypes: TIBUpdateRecordTypes read FUpdateRecordTypes
681	>	write SetUpdateRecordTypes;
682	>	property DataSetCloseAction: TDataSetCloseAction
683	>	read FDataSetCloseAction write FDataSetCloseAction;
684	>
685	>	published
686	>	property AllowAutoActivateTransaction: Boolean read FAllowAutoActivateTransaction
687	>	write FAllowAutoActivateTransaction;
688	>	property Database: TIBDatabase read GetDatabase write SetDatabase;
689	>	property Transaction: TIBTransaction read GetTransaction
690	>	write SetTransaction;
691	>	property ForcedRefresh: Boolean read FForcedRefresh
692	>	write FForcedRefresh default False;
693	>	property AutoCalcFields;
694	>
695	>	property AfterCancel;
696	>	property AfterClose;
697	>	property AfterDelete;
698	>	property AfterEdit;
699	>	property AfterInsert;
700	>	property AfterOpen;
701	>	property AfterPost;
702	>	property AfterRefresh;
703	>	property AfterScroll;
704	>	property BeforeCancel;
705	>	property BeforeClose;
706	>	property BeforeDelete;
707	>	property BeforeEdit;
708	>	property BeforeInsert;
709	>	property BeforeOpen;
710	>	property BeforePost;
711	>	property BeforeRefresh;
712	>	property BeforeScroll;
713	>	property OnCalcFields;
714	>	property OnDeleteError;
715	>	property OnEditError;
716	>	property OnNewRecord;
717	>	property OnPostError;
718	>	property OnUpdateError: TIBUpdateErrorEvent read FOnUpdateError
719	>	write FOnUpdateError;
720	>	property OnUpdateRecord: TIBUpdateRecordEvent read FOnUpdateRecord
721	>	write FOnUpdateRecord;
722	>	end;
723	>
724	>	TIBParserDataSet = class(TIBCustomDataSet)
725	>	public
726	>	property Parser;
727	>	end;
728	>
729	>	TIBDataSet = class(TIBParserDataSet)
730	>	private
731	>	function GetPrepared: Boolean;
732	>
733	>	protected
734	>	procedure SetFiltered(Value: Boolean); override;
735	>	procedure InternalOpen; override;
736	>
737	>	public
738	>	procedure Prepare;
739	>	procedure UnPrepare;
740	>	procedure BatchInput(InputObject: TIBBatchInput);
741	>	procedure BatchOutput(OutputObject: TIBBatchOutput);
742	>	procedure ExecSQL;
743	>
744	>	public
745	>	property Params;
746	>	property Prepared : Boolean read GetPrepared;
747	>	property QDelete;
748	>	property QInsert;
749	>	property QRefresh;
750	>	property QSelect;
751	>	property QModify;
752	>	property StatementType;
753	>	property SelectStmtHandle;
754	>	property BaseSQLSelect;
755	>
756	>	published
757	>	{ TIBCustomDataSet }
758	>	property AutoCommit;
759	>	property BufferChunks;
760	>	property CachedUpdates;
761	>	property DeleteSQL;
762	>	property InsertSQL;
763	>	property RefreshSQL;
764	>	property SelectSQL;
765	>	property ModifySQL;
766	>	property GeneratorField;
767	>	property GenerateParamNames;
768	>	property ParamCheck;
769	>	property UniDirectional;
770	>	property Filtered;
771	>	property DataSetCloseAction;
772	>
773	>	property BeforeDatabaseDisconnect;
774	>	property AfterDatabaseDisconnect;
775	>	property DatabaseFree;
776	>	property BeforeTransactionEnd;
777	>	property AfterTransactionEnd;
778	>	property TransactionFree;
779	>
780	>	{ TIBDataSet }
781	>	property Active;
782	>	property AutoCalcFields;
783	>	property DataSource read GetDataSource write SetDataSource;
784	>
785	>	property AfterCancel;
786	>	property AfterClose;
787	>	property AfterDelete;
788	>	property AfterEdit;
789	>	property AfterInsert;
790	>	property AfterOpen;
791	>	property AfterPost;
792	>	property AfterScroll;
793	>	property BeforeCancel;
794	>	property BeforeClose;
795	>	property BeforeDelete;
796	>	property BeforeEdit;
797	>	property BeforeInsert;
798	>	property BeforeOpen;
799	>	property BeforePost;
800	>	property BeforeScroll;
801	>	property OnCalcFields;
802	>	property OnDeleteError;
803	>	property OnEditError;
804	>	property OnFilterRecord;
805	>	property OnNewRecord;
806	>	property OnPostError;
807	>	property OnValidatePost;
808	>	end;
809	>
810	>	{ TIBDSBlobStream }
811	>	TIBDSBlobStream = class(TStream)
812	>	private
813	>	FHasWritten: boolean;
814	>	protected
815	>	FField: TField;
816	>	FBlobStream: TIBBlobStream;
817	>	function  GetSize: Int64; override;
818	>	public
819	>	constructor Create(AField: TField; ABlobStream: TIBBlobStream;
820	>	Mode: TBlobStreamMode);
821	>	destructor Destroy; override;
822	>	function Read(var Buffer; Count: Longint): Longint; override;
823	>	function Seek(Offset: Longint; Origin: Word): Longint; override;
824	>	procedure SetSize(NewSize: Longint); override;
825	>	function Write(const Buffer; Count: Longint): Longint; override;
826	>	end;
827	>
828	>	{Extended Field Def for character set info}
829	>
830	>	{ TIBFieldDef }
831	>
832	>	TIBFieldDef = class(TFieldDef)
833	>	private
834	>	FArrayBounds: TArrayBounds;
835	>	FArrayDimensions: integer;
836	>	FCharacterSetName: RawByteString;
837	>	FCharacterSetSize: integer;
838	>	FCodePage: TSystemCodePage;
839	>	FIdentityColumn: boolean;
840	>	FRelationName: string;
841	>	FDataSize: integer;
842	>	published
843	>	property CharacterSetName: RawByteString read FCharacterSetName write FCharacterSetName;
844	>	property CharacterSetSize: integer read FCharacterSetSize write FCharacterSetSize;
845	>	property CodePage: TSystemCodePage read FCodePage write FCodePage;
846	>	property DataSize: integer read FDataSize write FDataSize;
847	>	property RelationName: string read FRelationName write FRelationName;
848	>	property ArrayDimensions: integer read FArrayDimensions write FArrayDimensions;
849	>	property ArrayBounds: TArrayBounds read FArrayBounds write FArrayBounds;
850	>	property IdentityColumn: boolean read FIdentityColumn write FIdentityColumn default false;
851	>	end;
852	>
853	>	const
854	>	DefaultFieldClasses: array[TFieldType] of TFieldClass = (
855	>	nil,                { ftUnknown }
856	>	TIBStringField,     { ftString }
857	>	TIBSmallintField,   { ftSmallint }
858	>	TIBIntegerField,      { ftInteger }
859	>	TWordField,         { ftWord }
860	>	TBooleanField,      { ftBoolean }
861	>	TFloatField,        { ftFloat }
862	>	TCurrencyField,     { ftCurrency }
863	>	TIBBCDField,        { ftBCD }
864	>	TDateField,         { ftDate }
865	>	TTimeField,         { ftTime }
866	>	TDateTimeField,     { ftDateTime }
867	>	TBytesField,        { ftBytes }
868	>	TVarBytesField,     { ftVarBytes }
869	>	TAutoIncField,      { ftAutoInc }
870	>	TBlobField,         { ftBlob }
871	>	TIBMemoField,       { ftMemo }
872	>	TGraphicField,      { ftGraphic }
873	>	TBlobField,         { ftFmtMemo }
874	>	TBlobField,         { ftParadoxOle }
875	>	TBlobField,         { ftDBaseOle }
876	>	TBlobField,         { ftTypedBinary }
877	>	nil,                { ftCursor }
878	>	TStringField,       { ftFixedChar }
879	>	nil,    { ftWideString }
880	>	TIBLargeIntField,     { ftLargeInt }
881	>	nil,          { ftADT }
882	>	TIBArrayField,        { ftArray }
883	>	nil,    { ftReference }
884	>	nil,     { ftDataSet }
885	>	TBlobField,         { ftOraBlob }
886	>	TMemoField,         { ftOraClob }
887	>	TVariantField,      { ftVariant }
888	>	nil,    { ftInterface }
889	>	nil,     { ftIDispatch }
890	>	TGuidField,        { ftGuid }
891	>	TDateTimeField,    {ftTimestamp}
892	>	TIBBCDField,       {ftFMTBcd}
893	>	nil,  {ftFixedWideChar}
894	>	nil);   {ftWideMemo}
895	>	(*
896	>	TADTField,          { ftADT }
897	>	TArrayField,        { ftArray }
898	>	TReferenceField,    { ftReference }
899	>	TDataSetField,     { ftDataSet }
900	>	TBlobField,         { ftOraBlob }
901	>	TMemoField,         { ftOraClob }
902	>	TVariantField,      { ftVariant }
903	>	TInterfaceField,    { ftInterface }
904	>	TIDispatchField,     { ftIDispatch }
905	>	TGuidField);        { ftGuid } *)
906	>	(*var
907	>	CreateProviderProc: function(DataSet: TIBCustomDataSet): IProvider = nil;*)
908	>
909	>	implementation
910	>
911	>	uses Variants, FmtBCD, LazUTF8, FBMessages, IBQuery;
912	>
913	>	const FILE_BEGIN = 0;
914	>	FILE_CURRENT = 1;
915	>	FILE_END = 2;
916	>
917	>	type
918	>
919	>	TFieldNode = class(TObject)
920	>	protected
921	>	FieldName : String;
922	>	COMPUTED_BLR : Boolean;
923	>	DEFAULT_VALUE : boolean;
924	>	IDENTITY_COLUMN : boolean;
925	>	NextField : TFieldNode;
926	>	end;
927	>
928	>	TRelationNode = class(TObject)
929	>	protected
930	>	RelationName : String;
931	>	FieldNodes : TFieldNode;
932	>	NextRelation : TRelationNode;
933	>	end;
934	>
935	>
936	>	{  Copied from LCLProc in order to avoid LCL dependency
937	>
938	>	Ensures the covenient look of multiline string
939	>	when displaying it in the single line
940	>	* Replaces CR and LF with spaces
941	>	* Removes duplicate spaces
942	>	}
943	>	function TextToSingleLine(const AText: string): string;
944	>	var
945	>	str: string;
946	>	i, wstart, wlen: Integer;
947	>	begin
948	>	str := Trim(AText);
949	>	wstart := 0;
950	>	wlen := 0;
951	>	i := 1;
952	>	while i < Length(str) - 1 do
953	>	begin
954	>	if (str[i] in [' ', #13, #10]) then
955	>	begin
956	>	if (wstart = 0) then
957	>	begin
958	>	wstart := i;
959	>	wlen := 1;
960	>	end else
961	>	Inc(wlen);
962	>	end else
963	>	begin
964	>	if wstart > 0 then
965	>	begin
966	>	str[wstart] := ' ';
967	>	Delete(str, wstart+1, wlen-1);
968	>	Dec(i, wlen-1);
969	>	wstart := 0;
970	>	end;
971	>	end;
972	>	Inc(i);
973	>	end;
974	>	Result := str;
975	>	end;
976	>
977	>	{ TIBLargeIntField }
978	>
979	>	procedure TIBLargeIntField.Bind(Binding: Boolean);
980	>	begin
981	>	inherited Bind(Binding);
982	>	if Binding and (FieldDef <> nil) then
983	>	FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
984	>	end;
985	>
986	>	{ TIBIntegerField }
987	>
988	>	procedure TIBIntegerField.Bind(Binding: Boolean);
989	>	begin
990	>	inherited Bind(Binding);
991	>	if Binding and (FieldDef <> nil) then
992	>	FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
993	>	end;
994	>
995	>	{ TIBSmallintField }
996	>
997	>	procedure TIBSmallintField.Bind(Binding: Boolean);
998	>	begin
999	>	inherited Bind(Binding);
1000	>	if Binding and (FieldDef <> nil) then
1001	>	FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
1002	>	end;
1003	>
1004	>	{ TIBArray }
1005	>
1006	>	procedure TIBArray.EventHandler(Sender: IArray; Reason: TArrayEventReason);
1007	>	begin
1008	>	case Reason of
1009	>	arChanging:
1010	>	if FRecNo <> FField.Dataset.RecNo then
1011	>	IBError(ibxeNotCurrentArray,[nil]);
1012	>
1013	>	arChanged:
1014	>	FField.DataChanged;
1015	>	end;
1016	>	end;
1017	>
1018	>	constructor TIBArray.Create(aField: TIBArrayField; anArray: IArray);
1019	>	begin
1020	>	inherited Create;
1021	>	FField := aField;
1022	>	FArray := anArray;
1023	>	FRecNo := FField.Dataset.RecNo;
1024	>	FArray.AddEventHandler(EventHandler);
1025	>	end;
1026	>
1027	>	destructor TIBArray.Destroy;
1028	>	begin
1029	>	FArray.RemoveEventHandler(EventHandler);
1030	>	inherited Destroy;
1031	>	end;
1032	>
1033	>	{ TIBArrayField }
1034	>
1035	>	function TIBArrayField.GetArrayIntf: IArray;
1036	>	begin
1037	>	Result := TIBCustomDataSet(DataSet).GetArray(self);
1038	>	end;
1039	>
1040	>	function TIBArrayField.GetArrayID: TISC_QUAD;
1041	>	begin
1042	>	GetData(@Result);
1043	>	end;
1044	>
1045	>	procedure TIBArrayField.SetArrayIntf(AValue: IArray);
1046	>	begin
1047	>	TIBCustomDataSet(DataSet).SetArrayIntf(AValue,self);
1048	>	DataChanged;
1049	>	end;
1050	>
1051	>	class procedure TIBArrayField.CheckTypeSize(AValue: Longint);
1052	>	begin
1053	>	//Ignore
1054	>	end;
1055	>
1056	>	function TIBArrayField.GetAsString: string;
1057	>	begin
1058	>	Result := '(Array)';
1059	>	end;
1060	>
1061	>	function TIBArrayField.GetDataSize: Integer;
1062	>	begin
1063	>	Result := sizeof(TISC_QUAD);
1064	>	end;
1065	>
1066	>	procedure TIBArrayField.Bind(Binding: Boolean);
1067	>	begin
1068	>	inherited Bind(Binding);
1069	>	if Binding then
1070	>	begin
1071	>	FCacheOffset := TIBCustomDataSet(DataSet).ArrayFieldCount;
1072	>	Inc(TIBCustomDataSet(DataSet).FArrayFieldCount);
1073	>	if FieldDef <> nil then
1074	>	begin
1075	>	FRelationName := TIBFieldDef(FieldDef).FRelationName;
1076	>	FArrayDimensions := TIBFieldDef(FieldDef).ArrayDimensions;
1077	>	FArrayBounds :=  TIBFieldDef(FieldDef).ArrayBounds;
1078	>	end;
1079	>	end;
1080	>	end;
1081	>
1082	>	constructor TIBArrayField.Create(AOwner: TComponent);
1083	>	begin
1084	>	inherited Create(AOwner);
1085	>	SetDataType(ftArray);
1086	>	end;
1087	>
1088	>	function TIBArrayField.CreateArray: IArray;
1089	>	begin
1090	>	with DataSet as TIBCustomDataSet do
1091	>	Result := Database.Attachment.CreateArray(Transaction.TransactionIntf,FRelationName,FieldName);
1092	>	end;
1093	>
1094	>	{ TIBMemoField }
1095	>
1096	>	function TIBMemoField.GetTruncatedText: string;
1097	>	begin
1098	>	Result := GetAsString;
1099	>
1100	>	if Result <> '' then
1101	>	begin
1102	>	case CharacterSetSize of
1103	>	1:
1104	>	if DisplayWidth = 0 then
1105	>	Result := TextToSingleLine(Result)
1106	>	else
1107	>	if Length(Result) > DisplayWidth then {Show truncation with elipses}
1108	>	Result := TextToSingleLine(system.copy(Result,1,DisplayWidth-3)) + '...';
1109	>
1110	>	{2: case 2 ignored. This should be handled by TIBWideMemo}
1111	>
1112	>	3, {Assume UNICODE_FSS is really UTF8}
1113	>	4: {Include GB18030 - assuming UTF8 routines work for this codeset}
1114	>	if DisplayWidth = 0 then
1115	>	Result := ValidUTF8String(TextToSingleLine(Result))
1116	>	else
1117	>	if UTF8Length(Result) > DisplayWidth then {Show truncation with elipses}
1118	>	Result := ValidUTF8String(TextToSingleLine(UTF8Copy(Result,1,DisplayWidth-3))) + '...';
1119	>	end;
1120	>	end
1121	>	end;
1122	>
1123	>	procedure TIBMemoField.Bind(Binding: Boolean);
1124	>	var IBFieldDef: TIBFieldDef;
1125	>	begin
1126	>	inherited Bind(Binding);
1127	>	if Binding and (FieldDef <> nil) then
1128	>	begin
1129	>	IBFieldDef := FieldDef as TIBFieldDef;
1130	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
1131	>	CharacterSetName := IBFieldDef.CharacterSetName;
1132	>	CodePage := IBFieldDef.CodePage;
1133	>	end;
1134	>	end;
1135	>
1136	>	function TIBMemoField.GetAsString: string;
1137	>	var s: RawByteString;
1138	>	begin
1139	>	s := inherited GetAsString;
1140	>	SetCodePage(s,CodePage,false);
1141	>	if (CodePage <> CP_NONE) and (CodePage <> CP_UTF8) then
1142	>	SetCodePage(s,CP_UTF8,true);  {LCL only accepts UTF8}
1143	>	Result := s;
1144	>	end;
1145	>
1146	>	function TIBMemoField.GetDefaultWidth: Longint;
1147	>	begin
1148	>	if DisplayTextAsClassName then
1149	>	Result := inherited
1150	>	else
1151	>	Result := 128;
1152	>	end;
1153	>
1154	>	procedure TIBMemoField.GetText(var AText: string; ADisplayText: Boolean);
1155	>	begin
1156	>	if ADisplayText then
1157	>	begin
1158	>	if not DisplayTextAsClassName and (CharacterSetName <> '') then
1159	>	AText := GetTruncatedText
1160	>	else
1161	>	inherited GetText(AText, ADisplayText);
1162	>	end
1163	>	else
1164	>	AText := GetAsString;
1165	>	end;
1166	>
1167	>	procedure TIBMemoField.SetAsString(const AValue: string);
1168	>	var s: RawByteString;
1169	>	begin
1170	>	s := AValue;
1171	>	if StringCodePage(s) <> CodePage then
1172	>	SetCodePage(s,CodePage,CodePage<>CP_NONE);
1173	>	inherited SetAsString(s);
1174	>	end;
1175	>
1176	>	constructor TIBMemoField.Create(AOwner: TComponent);
1177	>	begin
1178	>	inherited Create(AOwner);
1179	>	BlobType := ftMemo;
1180	>	FCodePage := CP_NONE;
1181	>	end;
1182	>
1183	>	{ TIBControlLink }
1184	>
1185	>	destructor TIBControlLink.Destroy;
1186	>	begin
1187	>	IBDataSet := nil;
1188	>	inherited Destroy;
1189	>	end;
1190	>
1191	>	procedure TIBControlLink.UpdateParams(Sender: TObject);
1192	>	begin
1193	>
1194	>	end;
1195	>
1196	>	procedure TIBControlLink.UpdateSQL(Sender: TObject);
1197	>	begin
1198	>
1199	>	end;
1200	>
1201	>	procedure TIBControlLink.SetIBDataSet(AValue: TIBCustomDataSet);
1202	>	begin
1203	>	if FTIBDataSet = AValue then Exit;
1204	>	if IBDataSet <> nil then
1205	>	IBDataSet.UnRegisterIBLink(self);
1206	>	FTIBDataSet := AValue;
1207	>	if IBDataSet <> nil then
1208	>	IBDataSet.RegisterIBLink(self);
1209	>	end;
1210	>
1211	>
1212	>	{ TIBStringField}
1213	>
1214	>	procedure TIBStringField.Bind(Binding: Boolean);
1215	>	var IBFieldDef: TIBFieldDef;
1216	>	begin
1217	>	inherited Bind(Binding);
1218	>	if Binding and (FieldDef <> nil) then
1219	>	begin
1220	>	IBFieldDef := FieldDef as TIBFieldDef;
1221	>	CharacterSetSize := IBFieldDef.CharacterSetSize;
1222	>	CharacterSetName := IBFieldDef.CharacterSetName;
1223	>	FDataSize := IBFieldDef.DataSize + 1;
1224	>	if AutoFieldSize then
1225	>	Size := IBFieldDef.Size;
1226	>	CodePage := IBFieldDef.CodePage;
1227	>	end;
1228	>	end;
1229	>
1230	>	function TIBStringField.GetDataSize: Integer;
1231	>	begin
1232	>	Result := FDataSize;
1233	>	end;
1234	>
1235	>	constructor TIBStringField.Create(aOwner: TComponent);
1236	>	begin
1237	>	inherited Create(aOwner);
1238	>	FCharacterSetSize := 1;
1239	>	FCodePage := CP_NONE;
1240	>	FAutoFieldSize := true;
1241	>	end;
1242	>
1243	>	class procedure TIBStringField.CheckTypeSize(Value: Integer);
1244	>	begin
1245	>	{ don't check string size. all sizes valid }
1246	>	end;
1247	>
1248	>	function TIBStringField.GetAsString: string;
1249	>	begin
1250	>	if not GetValue(Result) then Result := '';
1251	>	end;
1252	>
1253	>	function TIBStringField.GetAsVariant: Variant;
1254	>	var
1255	>	S: string;
1256	>	begin
1257	>	if GetValue(S) then Result := S else Result := Null;
1258	>	end;
1259	>
1260	>	function TIBStringField.GetValue(var Value: string): Boolean;
1261	>	var
1262	>	Buffer: PChar;
1263	>	s: RawByteString;
1264	>	begin
1265	>	Buffer := nil;
1266	>	IBAlloc(Buffer, 0, DataSize);
1267	>	try
1268	>	Result := GetData(Buffer);
1269	>	if Result then
1270	>	begin
1271	>	s := strpas(Buffer);
1272	>	SetCodePage(s,CodePage,false);
1273	>	if (CodePage <> CP_NONE) and (CodePage <> CP_UTF8) then
1274	>	SetCodePage(s,CP_UTF8,true);  {LCL only accepts UTF8}
1275	>	Value := s;
1276	>	//      writeln(FieldName,': ', StringCodePage(Value),', ',Value);
1277	>	if Transliterate and (Value <> '') then
1278	>	DataSet.Translate(PChar(Value), PChar(Value), False);
1279	>	end
1280	>	finally
1281	>	FreeMem(Buffer);
1282	>	end;
1283	>	end;
1284	>
1285	>	procedure TIBStringField.SetAsString(const Value: string);
1286	>	var
1287	>	Buffer: PChar;
1288	>	s: RawByteString;
1289	>	begin
1290	>	Buffer := nil;
1291	>	IBAlloc(Buffer, 0, DataSize);
1292	>	try
1293	>	s := Value;
1294	>	if StringCodePage(s) <> CodePage then
1295	>	SetCodePage(s,CodePage,CodePage<>CP_NONE);
1296	>	StrLCopy(Buffer, PChar(s), DataSize-1);
1297	>	if Transliterate then
1298	>	DataSet.Translate(Buffer, Buffer, True);
1299	>	SetData(Buffer);
1300	>	finally
1301	>	FreeMem(Buffer);
1302	>	end;
1303	>	end;
1304	>
1305	>
1306	>	{ TIBBCDField }
1307	>
1308	>	constructor TIBBCDField.Create(AOwner: TComponent);
1309	>	begin
1310	>	inherited Create(AOwner);
1311	>	SetDataType(ftBCD);
1312	>	Size := 8;
1313	>	end;
1314	>
1315	>	procedure TIBBCDField.Bind(Binding: Boolean);
1316	>	begin
1317	>	inherited Bind(Binding);
1318	>	if Binding and (FieldDef <> nil) then
1319	>	FIdentityColumn := (FieldDef as TIBFieldDef).IdentityColumn;
1320	>	end;
1321	>
1322	>	class procedure TIBBCDField.CheckTypeSize(Value: Integer);
1323	>	begin
1324	>	{ No need to check as the base type is currency, not BCD }
1325	>	end;
1326	>
1327	>	function TIBBCDField.GetAsCurrency: Currency;
1328	>	begin
1329	>	if not GetValue(Result) then
1330	>	Result := 0;
1331	>	end;
1332	>
1333	>	function TIBBCDField.GetAsString: string;
1334	>	var
1335	>	C: System.Currency;
1336	>	begin
1337	>	if GetValue(C) then
1338	>	Result := CurrToStr(C)
1339	>	else
1340	>	Result := '';
1341	>	end;
1342	>
1343	>	function TIBBCDField.GetAsVariant: Variant;
1344	>	var
1345	>	C: System.Currency;
1346	>	begin
1347	>	if GetValue(C) then
1348	>	Result := C
1349	>	else
1350	>	Result := Null;
1351	>	end;
1352	>
1353	>	function TIBBCDField.GetDataSize: Integer;
1354	>	begin
1355	>	{$IFDEF TBCDFIELD_IS_BCD}
1356	>	Result := 8;
1357	>	{$ELSE}
1358	>	Result := inherited GetDataSize
1359	>	{$ENDIF}
1360	>	end;
1361	>
1362	>	{ TIBDataLink }
1363	>
1364	>	constructor TIBDataLink.Create(ADataSet: TIBCustomDataSet);
1365	>	begin
1366	>	inherited Create;
1367	>	FDataSet := ADataSet;
1368	>	end;
1369	>
1370	>	destructor TIBDataLink.Destroy;
1371	>	begin
1372	>	FDataSet.FDataLink := nil;
1373	>	inherited Destroy;
1374	>	end;
1375	>
1376	>
1377	>	procedure TIBDataLink.ActiveChanged;
1378	>	begin
1379	>	if FDataSet.Active then
1380	>	FDataSet.RefreshParams;
1381	>	end;
1382	>
1383	>
1384	>	function TIBDataLink.GetDetailDataSet: TDataSet;
1385	>	begin
1386	>	Result := FDataSet;
1387	>	end;
1388	>
1389	>	procedure TIBDataLink.RecordChanged(Field: TField);
1390	>	begin
1391	>	if (Field = nil) and FDataSet.Active then
1392	>	FDataSet.RefreshParams;
1393	>	end;
1394	>
1395	>	procedure TIBDataLink.CheckBrowseMode;
1396	>	begin
1397	>	if FDataSet.Active then
1398	>	FDataSet.CheckBrowseMode;
1399	>	end;
1400	>
1401	>	{ TIBCustomDataSet }
1402	>
1403	>	constructor TIBCustomDataSet.Create(AOwner: TComponent);
1404	>	begin
1405	>	inherited Create(AOwner);
1406	>	FBase := TIBBase.Create(Self);
1407	>	FDatabaseInfo := TIBDatabaseInfo.Create(self);
1408	>	FIBLinks := TList.Create;
1409	>	FCurrentRecord := -1;
1410	>	FDeletedRecords := 0;
1411	>	FUniDirectional := False;
1412	>	FBufferChunks := BufferCacheSize;
1413	>	FBlobStreamList := TList.Create;
1414	>	FArrayList := TList.Create;
1415	>	FGeneratorField := TIBGenerator.Create(self);
1416	>	FDataLink := TIBDataLink.Create(Self);
1417	>	FQDelete := TIBSQL.Create(Self);
1418	>	FQDelete.OnSQLChanging := SQLChanging;
1419	>	FQDelete.GoToFirstRecordOnExecute := False;
1420	>	FQInsert := TIBSQL.Create(Self);
1421	>	FQInsert.OnSQLChanging := SQLChanging;
1422	>	FQInsert.GoToFirstRecordOnExecute := False;
1423	>	FQRefresh := TIBSQL.Create(Self);
1424	>	FQRefresh.OnSQLChanging := SQLChanging;
1425	>	FQRefresh.GoToFirstRecordOnExecute := False;
1426	>	FQSelect := TIBSQL.Create(Self);
1427	>	FQSelect.OnSQLChanging := SQLChanging;
1428	>	FQSelect.OnSQLChanged := SQLChanged;
1429	>	FQSelect.GoToFirstRecordOnExecute := False;
1430	>	FQModify := TIBSQL.Create(Self);
1431	>	FQModify.OnSQLChanging := SQLChanging;
1432	>	FQModify.GoToFirstRecordOnExecute := False;
1433	>	FUpdateRecordTypes := [cusUnmodified, cusModified, cusInserted];
1434	>	FParamCheck := True;
1435	>	FGenerateParamNames := False;
1436	>	FForcedRefresh := False;
1437	>	FAutoCommit:= acDisabled;
1438	>	FDataSetCloseAction := dcDiscardChanges;
1439	>	{Bookmark Size is Integer for IBX}
1440	>	BookmarkSize := SizeOf(Integer);
1441	>	FBase.BeforeDatabaseDisconnect := DoBeforeDatabaseDisconnect;
1442	>	FBase.AfterDatabaseDisconnect := DoAfterDatabaseDisconnect;
1443	>	FBase.OnDatabaseFree := DoDatabaseFree;
1444	>	FBase.BeforeTransactionEnd := DoBeforeTransactionEnd;
1445	>	FBase.AfterTransactionEnd := DoAfterTransactionEnd;
1446	>	FBase.OnTransactionFree := DoTransactionFree;
1447	>	if AOwner is TIBDatabase then
1448	>	Database := TIBDatabase(AOwner)
1449	>	else
1450	>	if AOwner is TIBTransaction then
1451	>	Transaction := TIBTransaction(AOwner);
1452	>	FBaseSQLSelect := TStringList.Create;
1453	>	end;
1454	>
1455	>	destructor TIBCustomDataSet.Destroy;
1456	>	begin
1457	>	if Active then Active := false;
1458	>	if assigned(FGeneratorField) then FGeneratorField.Free;
1459	>	FDataLink.Free;
1460	>	FBase.Free;
1461	>	ClearBlobCache;
1462	>	ClearIBLinks;
1463	>	FIBLinks.Free;
1464	>	FBlobStreamList.Free;
1465	>	FArrayList.Free;
1466	>	FreeMem(FBufferCache);
1467	>	FBufferCache := nil;
1468	>	FreeMem(FOldBufferCache);
1469	>	FOldBufferCache := nil;
1470	>	FCacheSize := 0;
1471	>	FOldCacheSize := 0;
1472	>	FMappedFieldPosition := nil;
1473	>	if assigned(FBaseSQLSelect) then FBaseSQLSelect.Free;
1474	>	if assigned(FParser) then FParser.Free;
1475	>	inherited Destroy;
1476	>	end;
1477	>
1478	>	function TIBCustomDataSet.AdjustCurrentRecord(Buffer: Pointer; GetMode: TGetMode):
1479	>	TGetResult;
1480	>	begin
1481	>	while not IsVisible(Buffer) do
1482	>	begin
1483	>	if GetMode = gmPrior then
1484	>	begin
1485	>	Dec(FCurrentRecord);
1486	>	if FCurrentRecord = -1 then
1487	>	begin
1488	>	result := grBOF;
1489	>	exit;
1490	>	end;
1491	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1492	>	end
1493	>	else begin
1494	>	Inc(FCurrentRecord);
1495	>	if (FCurrentRecord = FRecordCount) then
1496	>	begin
1497	>	if (not FQSelect.EOF) and FQSelect.Next  then
1498	>	begin
1499	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
1500	>	Inc(FRecordCount);
1501	>	end
1502	>	else begin
1503	>	result := grEOF;
1504	>	exit;
1505	>	end;
1506	>	end
1507	>	else
1508	>	ReadRecordCache(FCurrentRecord, Buffer, False);
1509	>	end;
1510	>	end;
1511	>	result := grOK;
1512	>	end;
1513	>
1514	>	procedure TIBCustomDataSet.ApplyUpdates;
1515	>	var
1516	>	CurBookmark: TBookmark;
1517	>	Buffer: PRecordData;
1518	>	CurUpdateTypes: TIBUpdateRecordTypes;
1519	>	UpdateAction: TIBUpdateAction;
1520	>	UpdateKind: TUpdateKind;
1521	>	bRecordsSkipped: Boolean;
1522	>
1523	>	procedure GetUpdateKind;
1524	>	begin
1525	>	case Buffer^.rdCachedUpdateStatus of
1526	>	cusModified:
1527	>	UpdateKind := ukModify;
1528	>	cusInserted:
1529	>	UpdateKind := ukInsert;
1530	>	else
1531	>	UpdateKind := ukDelete;
1532	>	end;
1533	>	end;
1534	>
1535	>	procedure ResetBufferUpdateStatus;
1536	>	begin
1537	>	case Buffer^.rdCachedUpdateStatus of
1538	>	cusModified:
1539	>	begin
1540	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1541	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1542	>	end;
1543	>	cusInserted:
1544	>	begin
1545	>	PRecordData(Buffer)^.rdUpdateStatus := usUnmodified;
1546	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1547	>	end;
1548	>	cusDeleted:
1549	>	begin
1550	>	PRecordData(Buffer)^.rdUpdateStatus := usDeleted;
1551	>	PRecordData(Buffer)^.rdCachedUpdateStatus := cusUnmodified;
1552	>	end;
1553	>	end;
1554	>	WriteRecordCache(PRecordData(Buffer)^.rdRecordNumber, Pointer(Buffer));
1555	>	end;
1556	>
1557	>	procedure UpdateUsingOnUpdateRecord;
1558	>	begin
1559	>	UpdateAction := uaFail;
1560	>	try
1561	>	FOnUpdateRecord(Self, UpdateKind, UpdateAction);
1562	>	except
1563	>	on E: Exception do
1564	>	begin
1565	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1566	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1567	>	if UpdateAction = uaFail then
1568	>	raise;
1569	>	end;
1570	>	end;
1571	>	end;
1572	>
1573	>	procedure UpdateUsingUpdateObject;
1574	>	begin
1575	>	try
1576	>	FUpdateObject.Apply(UpdateKind,PChar(Buffer));
1577	>	ResetBufferUpdateStatus;
1578	>	except
1579	>	on E: Exception do
1580	>	if (E is EDatabaseError) and Assigned(FOnUpdateError) then
1581	>	FOnUpdateError(Self, EIBError(E), UpdateKind, UpdateAction);
1582	>	end;
1583	>	end;
1584	>
1585	>	procedure UpdateUsingInternalquery;
1586	>	begin
1587	>	try
1588	>	case Buffer^.rdCachedUpdateStatus of
1589	>	cusModified:
1590	>	InternalPostRecord(FQModify, Buffer);
1591	>	cusInserted:
1592	>	InternalPostRecord(FQInsert, Buffer);
1593	>	cusDeleted:
1594	>	InternalDeleteRecord(FQDelete, Buffer);
1595	>	end;
1596	>	except
1597	>	on E: EIBError do begin
1598	>	UpdateAction := uaFail;
1599	>	if Assigned(FOnUpdateError) then
1600	>	FOnUpdateError(Self, E, UpdateKind, UpdateAction);
1601	>	case UpdateAction of
1602	>	uaFail: raise;
1603	>	uaAbort: SysUtils.Abort;
1604	>	uaSkip: bRecordsSkipped := True;
1605	>	end;
1606	>	end;
1607	>	end;
1608	>	end;
1609	>
1610	>	begin
1611	>	if State in [dsEdit, dsInsert] then
1612	>	Post;
1613	>	FBase.CheckDatabase;
1614	>	FBase.CheckTransaction;
1615	>	DisableControls;
1616	>	CurBookmark := Bookmark;
1617	>	CurUpdateTypes := FUpdateRecordTypes;
1618	>	FUpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1619	>	try
1620	>	First;
1621	>	bRecordsSkipped := False;
1622	>	while not EOF do
1623	>	begin
1624	>	Buffer := PRecordData(GetActiveBuf);
1625	>	GetUpdateKind;
1626	>	UpdateAction := uaApply;
1627	>	if Assigned(FUpdateObject) or Assigned(FOnUpdateRecord) then
1628	>	begin
1629	>	if (Assigned(FOnUpdateRecord)) then
1630	>	UpdateUsingOnUpdateRecord
1631	>	else
1632	>	if Assigned(FUpdateObject) then
1633	>	UpdateUsingUpdateObject;
1634	>	case UpdateAction of
1635	>	uaFail:
1636	>	IBError(ibxeUserAbort, [nil]);
1637	>	uaAbort:
1638	>	SysUtils.Abort;
1639	>	uaApplied:
1640	>	ResetBufferUpdateStatus;
1641	>	uaSkip:
1642	>	bRecordsSkipped := True;
1643	>	uaRetry:
1644	>	Continue;
1645	>	end;
1646	>	end;
1647	>	if (not Assigned(FUpdateObject)) and (UpdateAction = UaApply) then
1648	>	begin
1649	>	UpdateUsingInternalquery;
1650	>	UpdateAction := uaApplied;
1651	>	end;
1652	>	Next;
1653	>	end;
1654	>	FUpdatesPending := bRecordsSkipped;
1655	>	finally
1656	>	FUpdateRecordTypes := CurUpdateTypes;
1657	>	Bookmark := CurBookmark;
1658	>	EnableControls;
1659	>	end;
1660	>	end;
1661	>
1662	>	procedure TIBCustomDataSet.InternalBatchInput(InputObject: TIBBatchInput);
1663	>	begin
1664	>	FQSelect.BatchInput(InputObject);
1665	>	end;
1666	>
1667	>	procedure TIBCustomDataSet.InternalBatchOutput(OutputObject: TIBBatchOutput);
1668	>	var
1669	>	Qry: TIBSQL;
1670	>	begin
1671	>	Qry := TIBSQL.Create(Self);
1672	>	try
1673	>	Qry.Database := FBase.Database;
1674	>	Qry.Transaction := FBase.Transaction;
1675	>	Qry.SQL.Assign(FQSelect.SQL);
1676	>	Qry.BatchOutput(OutputObject);
1677	>	finally
1678	>	Qry.Free;
1679	>	end;
1680	>	end;
1681	>
1682	>	procedure TIBCustomDataSet.CancelUpdates;
1683	>	var
1684	>	CurUpdateTypes: TIBUpdateRecordTypes;
1685	>	begin
1686	>	if State in [dsEdit, dsInsert] then
1687	>	Post;
1688	>	if FCachedUpdates and FUpdatesPending then
1689	>	begin
1690	>	DisableControls;
1691	>	CurUpdateTypes := UpdateRecordTypes;
1692	>	UpdateRecordTypes := [cusModified, cusInserted, cusDeleted];
1693	>	try
1694	>	First;
1695	>	while not EOF do
1696	>	begin
1697	>	if UpdateStatus = usInserted then
1698	>	RevertRecord
1699	>	else
1700	>	begin
1701	>	RevertRecord;
1702	>	Next;
1703	>	end;
1704	>	end;
1705	>	finally
1706	>	UpdateRecordTypes := CurUpdateTypes;
1707	>	First;
1708	>	FUpdatesPending := False;
1709	>	EnableControls;
1710	>	end;
1711	>	end;
1712	>	end;
1713	>
1714	>	function TIBCustomDataSet.GetFieldPosition(AliasName: string): integer;
1715	>	var i: integer;
1716	>	Prepared: boolean;
1717	>	begin
1718	>	Result := 0;
1719	>	Prepared := FInternalPrepared;
1720	>	if not Prepared then
1721	>	InternalPrepare;
1722	>	try
1723	>	for i := 0 to Length(FAliasNameList) - 1 do
1724	>	if FAliasNameList[i] = AliasName then
1725	>	begin
1726	>	Result := i + 1;
1727	>	Exit
1728	>	end;
1729	>	finally
1730	>	if not Prepared then
1731	>	InternalUnPrepare;
1732	>	end;
1733	>	end;
1734	>
1735	>	procedure TIBCustomDataSet.ActivateConnection;
1736	>	begin
1737	>	if not Assigned(Database) then
1738	>	IBError(ibxeDatabaseNotAssigned, [nil]);
1739	>	if not Assigned(Transaction) then
1740	>	IBError(ibxeTransactionNotAssigned, [nil]);
1741	>	if not Database.Connected then Database.Open;
1742	>	end;
1743	>
1744	>	function TIBCustomDataSet.ActivateTransaction: Boolean;
1745	>	begin
1746	>	Result := False;
1747	>	if AllowAutoActivateTransaction or (csDesigning in ComponentState) then
1748	>	begin
1749	>	if not Assigned(Transaction) then
1750	>	IBError(ibxeTransactionNotAssigned, [nil]);
1751	>	if not Transaction.Active then
1752	>	begin
1753	>	Result := True;
1754	>	Transaction.StartTransaction;
1755	>	FDidActivate := True;
1756	>	end;
1757	>	end;
1758	>	end;
1759	>
1760	>	procedure TIBCustomDataSet.DeactivateTransaction;
1761	>	var
1762	>	i: Integer;
1763	>	begin
1764	>	if not Assigned(Transaction) then
1765	>	IBError(ibxeTransactionNotAssigned, [nil]);
1766	>	with Transaction do
1767	>	begin
1768	>	for i := 0 to SQLObjectCount - 1 do
1769	>	begin
1770	>	if (SQLObjects[i] <> nil) and ((SQLObjects[i]).owner is TDataSet) then
1771	>	begin
1772	>	if TDataSet(SQLObjects[i].owner).Active then
1773	>	begin
1774	>	FDidActivate := False;
1775	>	exit;
1776	>	end;
1777	>	end;
1778	>	end;
1779	>	end;
1780	>	FInternalPrepared := False;
1781	>	if Transaction.InTransaction then
1782	>	Transaction.Commit;
1783	>	FDidActivate := False;
1784	>	end;
1785	>
1786	>	procedure TIBCustomDataSet.CheckDatasetClosed;
1787	>	begin
1788	>	if FOpen then
1789	>	IBError(ibxeDatasetOpen, [nil]);
1790	>	end;
1791	>
1792	>	procedure TIBCustomDataSet.CheckDatasetOpen;
1793	>	begin
1794	>	if not FOpen then
1795	>	IBError(ibxeDatasetClosed, [nil]);
1796	>	end;
1797	>
1798	>	function TIBCustomDataSet.CreateParser: TSelectSQLParser;
1799	>	begin
1800	>	Result := TSelectSQLParser.Create(self,FBaseSQLSelect);
1801	>	Result.OnSQLChanging := SQLChanging
1802	>	end;
1803	>
1804	>	procedure TIBCustomDataSet.CheckNotUniDirectional;
1805	>	begin
1806	>	if UniDirectional then
1807	>	IBError(ibxeDataSetUniDirectional, [nil]);
1808	>	end;
1809	>
1810	>	procedure TIBCustomDataSet.AdjustRecordOnInsert(Buffer: Pointer);
1811	>	begin
1812	>	with PRecordData(Buffer)^ do
1813	>	if (State = dsInsert) and (not Modified) then
1814	>	begin
1815	>	rdRecordNumber := FRecordCount;
1816	>	FCurrentRecord := FRecordCount;
1817	>	end;
1818	>	end;
1819	>
1820	>	function TIBCustomDataSet.CanEdit: Boolean;
1821	>	var
1822	>	Buff: PRecordData;
1823	>	begin
1824	>	Buff := PRecordData(GetActiveBuf);
1825	>	result := (FQModify.SQL.Text <> '') or
1826	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukModify).Text <> '')) or
1827	>	((Buff <> nil) and (Buff^.rdCachedUpdateStatus = cusInserted) and
1828	>	(FCachedUpdates));
1829	>	end;
1830	>
1831	>	function TIBCustomDataSet.CanInsert: Boolean;
1832	>	begin
1833	>	result := (FQInsert.SQL.Text <> '') or
1834	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukInsert).Text <> ''));
1835	>	end;
1836	>
1837	>	function TIBCustomDataSet.CanDelete: Boolean;
1838	>	begin
1839	>	if (FQDelete.SQL.Text <> '') or
1840	>	(Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
1841	>	result := True
1842	>	else
1843	>	result := False;
1844	>	end;
1845	>
1846	>	function TIBCustomDataSet.CanRefresh: Boolean;
1847	>	begin
1848	>	result := (FQRefresh.SQL.Text <> '') or
1849	>	(Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> ''));
1850	>	end;
1851	>
1852	>	procedure TIBCustomDataSet.CheckEditState;
1853	>	begin
1854	>	case State of
1855	>	{ Check all the wsEditMode types }
1856	>	dsEdit, dsInsert, dsSetKey, dsCalcFields, dsFilter,
1857	>	dsNewValue, dsInternalCalc :
1858	>	begin
1859	>	if (State in [dsEdit]) and (not CanEdit) then
1860	>	IBError(ibxeCannotUpdate, [nil]);
1861	>	if (State in [dsInsert]) and (not CanInsert) then
1862	>	IBError(ibxeCannotInsert, [nil]);
1863	>	end;
1864	>	else
1865	>	IBError(ibxeNotEditing, [])
1866	>	end;
1867	>	end;
1868	>
1869	>	procedure TIBCustomDataSet.ClearBlobCache;
1870	>	var
1871	>	i: Integer;
1872	>	begin
1873	>	for i := 0 to FBlobStreamList.Count - 1 do
1874	>	begin
1875	>	TIBBlobStream(FBlobStreamList[i]).Free;
1876	>	FBlobStreamList[i] := nil;
1877	>	end;
1878	>	FBlobStreamList.Pack;
1879	>	end;
1880	>
1881	>	procedure TIBCustomDataSet.ClearArrayCache;
1882	>	var
1883	>	i: Integer;
1884	>	begin
1885	>	for i := 0 to FArrayList.Count - 1 do
1886	>	begin
1887	>	TIBArray(FArrayList[i]).Free;
1888	>	FArrayList[i] := nil;
1889	>	end;
1890	>	FArrayList.Pack;
1891	>	end;
1892	>
1893	>	procedure TIBCustomDataSet.CopyRecordBuffer(Source, Dest: Pointer);
1894	>	begin
1895	>	Move(Source^, Dest^, FRecordBufferSize);
1896	>	end;
1897	>
1898	>	procedure TIBCustomDataSet.DoBeforeDatabaseDisconnect(Sender: TObject);
1899	>	begin
1900	>	if Active then
1901	>	Active := False;
1902	>	InternalUnPrepare;
1903	>	if Assigned(FBeforeDatabaseDisconnect) then
1904	>	FBeforeDatabaseDisconnect(Sender);
1905	>	end;
1906	>
1907	>	procedure TIBCustomDataSet.DoAfterDatabaseDisconnect(Sender: TObject);
1908	>	begin
1909	>	if Assigned(FAfterDatabaseDisconnect) then
1910	>	FAfterDatabaseDisconnect(Sender);
1911	>	end;
1912	>
1913	>	procedure TIBCustomDataSet.DoDatabaseFree(Sender: TObject);
1914	>	begin
1915	>	if Assigned(FDatabaseFree) then
1916	>	FDatabaseFree(Sender);
1917	>	end;
1918	>
1919	>	procedure TIBCustomDataSet.DoBeforeTransactionEnd(Sender: TObject;
1920	>	Action: TTransactionAction);
1921	>	begin
1922	>	FCloseAction := Action;
1923	>	FInTransactionEnd := true;
1924	>	try
1925	>	if Active then
1926	>	Active := False;
1927	>	finally
1928	>	FInTransactionEnd := false;
1929	>	end;
1930	>	if FQSelect <> nil then
1931	>	FQSelect.FreeHandle;
1932	>	if FQDelete <> nil then
1933	>	FQDelete.FreeHandle;
1934	>	if FQInsert <> nil then
1935	>	FQInsert.FreeHandle;
1936	>	if FQModify <> nil then
1937	>	FQModify.FreeHandle;
1938	>	if FQRefresh <> nil then
1939	>	FQRefresh.FreeHandle;
1940	>	InternalUnPrepare;
1941	>	if Assigned(FBeforeTransactionEnd) then
1942	>	FBeforeTransactionEnd(Sender);
1943	>	end;
1944	>
1945	>	procedure TIBCustomDataSet.DoAfterTransactionEnd(Sender: TObject);
1946	>	begin
1947	>	if Assigned(FAfterTransactionEnd) then
1948	>	FAfterTransactionEnd(Sender);
1949	>	end;
1950	>
1951	>	procedure TIBCustomDataSet.DoTransactionFree(Sender: TObject);
1952	>	begin
1953	>	if Assigned(FTransactionFree) then
1954	>	FTransactionFree(Sender);
1955	>	end;
1956	>
1957	>	procedure TIBCustomDataSet.InitModelBuffer(Qry: TIBSQL; Buffer: PChar);
1958	>	var i, j: Integer;
1959	>	FieldsLoaded: integer;
1960	>	p: PRecordData;
1961	>	colMetadata: IColumnMetaData;
1962	>	begin
1963	>	p := PRecordData(Buffer);
1964	>	{ Get record information }
1965	>	p^.rdBookmarkFlag := bfCurrent;
1966	>	p^.rdFieldCount := Qry.FieldCount;
1967	>	p^.rdRecordNumber := -1;
1968	>	p^.rdUpdateStatus := usUnmodified;
1969	>	p^.rdCachedUpdateStatus := cusUnmodified;
1970	>	p^.rdSavedOffset := $FFFFFFFF;
1971	>
1972	>	{ Load up the fields }
1973	>	FieldsLoaded := FQSelect.MetaData.Count;
1974	>	j := 1;
1975	>	for i := 0 to Qry.MetaData.Count - 1 do
1976	>	begin
1977	>	if (Qry = FQSelect) then
1978	>	j := i + 1
1979	>	else
1980	>	begin
1981	>	if FieldsLoaded = 0 then
1982	>	break;
1983	>	j := FQSelect.FieldIndex[Qry[i].Name] + 1;
1984	>	if j < 1 then
1985	>	continue
1986	>	else
1987	>	Dec(FieldsLoaded);
1988	>	end;
1989	>	if j > 0 then
1990	>	begin
1991	>	colMetadata := Qry.MetaData[i];
1992	>	with p^.rdFields[j], FFieldColumns^[j] do
1993	>	begin
1994	>	fdDataType := colMetadata.GetSQLType;
1995	>	if fdDataType = SQL_BLOB then
1996	>	fdDataScale := 0
1997	>	else
1998	>	fdDataScale := colMetadata.getScale;
1999	>	fdNullable := colMetadata.getIsNullable;
2000	>	fdIsNull := true;
2001	>	fdDataSize := colMetadata.GetSize;
2002	>	fdDataLength := 0;
2003	>	fdCodePage := CP_NONE;
2004	>
2005	>	case fdDataType of
2006	>	SQL_TIMESTAMP,
2007	>	SQL_TYPE_DATE,
2008	>	SQL_TYPE_TIME:
2009	>	fdDataSize := SizeOf(TDateTime);
2010	>	SQL_SHORT, SQL_LONG:
2011	>	begin
2012	>	if (fdDataScale = 0) then
2013	>	fdDataSize := SizeOf(Integer)
2014	>	else
2015	>	if (fdDataScale >= (-4)) then
2016	>	fdDataSize := SizeOf(Currency)
2017	>	else
2018	>	fdDataSize := SizeOf(Double);
2019	>	end;
2020	>	SQL_INT64:
2021	>	begin
2022	>	if (fdDataScale = 0) then
2023	>	fdDataSize := SizeOf(Int64)
2024	>	else
2025	>	if (fdDataScale >= (-4)) then
2026	>	fdDataSize := SizeOf(Currency)
2027	>	else
2028	>	fdDataSize := SizeOf(Double);
2029	>	end;
2030	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
2031	>	fdDataSize := SizeOf(Double);
2032	>	SQL_BOOLEAN:
2033	>	fdDataSize := SizeOf(wordBool);
2034	>	SQL_VARYING,
2035	>	SQL_TEXT,
2036	>	SQL_BLOB:
2037	>	fdCodePage := Qry.Metadata[i].getCodePage;
2038	>	end;
2039	>	fdDataOfs := FRecordSize;
2040	>	Inc(FRecordSize, fdDataSize);
2041	>	end;
2042	>	end;
2043	>	end;
2044	>	end;
2045	>
2046	>	{Update Buffer Fields from Query Results}
2047	>
2048	>	procedure TIBCustomDataSet.UpdateRecordFromQuery(QryResults: IResults;
2049	>	Buffer: PChar);
2050	>	var i, j: integer;
2051	>	begin
2052	>	for i := 0 to QryResults.Count - 1 do
2053	>	begin
2054	>	j := GetFieldPosition(QryResults[i].GetAliasName);
2055	>	if j > 0 then
2056	>	ColumnDataToBuffer(QryResults,i,j,Buffer);
2057	>	end;
2058	>	end;
2059	>
2060	>
2061	>	{Move column data returned from query to row buffer}
2062	>
2063	>	procedure TIBCustomDataSet.ColumnDataToBuffer(QryResults: IResults;
2064	>	ColumnIndex, FieldIndex: integer; Buffer: PChar);
2065	>	var
2066	>	LocalData: PByte;
2067	>	LocalDate, LocalDouble: Double;
2068	>	LocalInt: Integer;
2069	>	LocalBool: wordBool;
2070	>	LocalInt64: Int64;
2071	>	LocalCurrency: Currency;
2072	>	p: PRecordData;
2073	>	ColData: ISQLData;
2074	>	begin
2075	>	p := PRecordData(Buffer);
2076	>	LocalData := nil;
2077	>	with p^.rdFields[FieldIndex], FFieldColumns^[FieldIndex] do
2078	>	begin
2079	>	QryResults.GetData(ColumnIndex,fdIsNull,fdDataLength,LocalData);
2080	>	if not fdIsNull then
2081	>	begin
2082	>	ColData := QryResults[ColumnIndex];
2083	>	case fdDataType of  {Get Formatted data for column types that need formatting}
2084	>	SQL_TIMESTAMP:
2085	>	begin
2086	>	LocalDate := TimeStampToMSecs(DateTimeToTimeStamp(ColData.AsDateTime));
2087	>	LocalData := PByte(@LocalDate);
2088	>	end;
2089	>	SQL_TYPE_DATE:
2090	>	begin
2091	>	LocalInt := DateTimeToTimeStamp(ColData.AsDateTime).Date;
2092	>	LocalData := PByte(@LocalInt);
2093	>	end;
2094	>	SQL_TYPE_TIME:
2095	>	begin
2096	>	LocalInt := DateTimeToTimeStamp(ColData.AsDateTime).Time;
2097	>	LocalData := PByte(@LocalInt);
2098	>	end;
2099	>	SQL_SHORT, SQL_LONG:
2100	>	begin
2101	>	if (fdDataScale = 0) then
2102	>	begin
2103	>	LocalInt := ColData.AsLong;
2104	>	LocalData := PByte(@LocalInt);
2105	>	end
2106	>	else
2107	>	if (fdDataScale >= (-4)) then
2108	>	begin
2109	>	LocalCurrency := ColData.AsCurrency;
2110	>	LocalData := PByte(@LocalCurrency);
2111	>	end
2112	>	else
2113	>	begin
2114	>	LocalDouble := ColData.AsDouble;
2115	>	LocalData := PByte(@LocalDouble);
2116	>	end;
2117	>	end;
2118	>	SQL_INT64:
2119	>	begin
2120	>	if (fdDataScale = 0) then
2121	>	begin
2122	>	LocalInt64 := ColData.AsInt64;
2123	>	LocalData := PByte(@LocalInt64);
2124	>	end
2125	>	else
2126	>	if (fdDataScale >= (-4)) then
2127	>	begin
2128	>	LocalCurrency := ColData.AsCurrency;
2129	>	LocalData := PByte(@LocalCurrency);
2130	>	end
2131	>	else
2132	>	begin
2133	>	LocalDouble := ColData.AsDouble;
2134	>	LocalData := PByte(@LocalDouble);
2135	>	end
2136	>	end;
2137	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
2138	>	begin
2139	>	LocalDouble := ColData.AsDouble;
2140	>	LocalData := PByte(@LocalDouble);
2141	>	end;
2142	>	SQL_BOOLEAN:
2143	>	begin
2144	>	LocalBool := ColData.AsBoolean;
2145	>	LocalData := PByte(@LocalBool);
2146	>	end;
2147	>	end;
2148	>
2149	>	if fdDataType = SQL_VARYING then
2150	>	Move(LocalData^, Buffer[fdDataOfs], fdDataLength)
2151	>	else
2152	>	Move(LocalData^, Buffer[fdDataOfs], fdDataSize)
2153	>	end
2154	>	else {Null column}
2155	>	if fdDataType = SQL_VARYING then
2156	>	FillChar(Buffer[fdDataOfs],fdDataLength,0)
2157	>	else
2158	>	FillChar(Buffer[fdDataOfs],fdDataSize,0);
2159	>	end;
2160	>	end;
2161	>
2162	>	{ Read the record from FQSelect.Current into the record buffer
2163	>	Then write the buffer to in memory cache }
2164	>	procedure TIBCustomDataSet.FetchCurrentRecordToBuffer(Qry: TIBSQL;
2165	>	RecordNumber: Integer; Buffer: PChar);
2166	>	var
2167	>	pbd: PBlobDataArray;
2168	>	pda: PArrayDataArray;
2169	>	i, j: Integer;
2170	>	FieldsLoaded: Integer;
2171	>	p: PRecordData;
2172	>	begin
2173	>	if RecordNumber = -1 then
2174	>	begin
2175	>	InitModelBuffer(Qry,Buffer);
2176	>	Exit;
2177	>	end;
2178	>	p := PRecordData(Buffer);
2179	>	{ Make sure blob cache is empty }
2180	>	pbd := PBlobDataArray(Buffer + FBlobCacheOffset);
2181	>	pda := PArrayDataArray(Buffer + FArrayCacheOffset);
2182	>	for i := 0 to BlobFieldCount - 1 do
2183	>	pbd^[i] := nil;
2184	>	for i := 0 to ArrayFieldCount - 1 do
2185	>	pda^[i] := nil;
2186	>
2187	>	{ Get record information }
2188	>	p^.rdBookmarkFlag := bfCurrent;
2189	>	p^.rdFieldCount := Qry.FieldCount;
2190	>	p^.rdRecordNumber := RecordNumber;
2191	>	p^.rdUpdateStatus := usUnmodified;
2192	>	p^.rdCachedUpdateStatus := cusUnmodified;
2193	>	p^.rdSavedOffset := $FFFFFFFF;
2194	>
2195	>	{ Load up the fields }
2196	>	FieldsLoaded := FQSelect.MetaData.Count;
2197	>	j := 1;
2198	>	for i := 0 to Qry.FieldCount - 1 do
2199	>	begin
2200	>	if (Qry = FQSelect) then
2201	>	j := i + 1
2202	>	else
2203	>	begin
2204	>	if FieldsLoaded = 0 then
2205	>	break;
2206	>	j := FQSelect.FieldIndex[Qry[i].Name] + 1;
2207	>	if j < 1 then
2208	>	continue
2209	>	else
2210	>	Dec(FieldsLoaded);
2211	>	end;
2212	>	with FQSelect.MetaData[j - 1] do
2213	>	if GetAliasname = 'IBX_INTERNAL_DBKEY' then {do not localize}
2214	>	begin
2215	>	if (GetSize <= 8) then
2216	>	p^.rdDBKey := PIBDBKEY(Qry[i].AsPointer)^;
2217	>	continue;
2218	>	end;
2219	>	if j > 0 then
2220	>	ColumnDataToBuffer(Qry.Current,i,j,Buffer);
2221	>	end;
2222	>	WriteRecordCache(RecordNumber, Buffer);
2223	>	end;
2224	>
2225	>	function TIBCustomDataSet.GetActiveBuf: PChar;
2226	>	begin
2227	>	case State of
2228	>	dsBrowse:
2229	>	if IsEmpty then
2230	>	result := nil
2231	>	else
2232	>	result := ActiveBuffer;
2233	>	dsEdit, dsInsert:
2234	>	result := ActiveBuffer;
2235	>	dsCalcFields:
2236	>	result := CalcBuffer;
2237	>	dsFilter:
2238	>	result := FFilterBuffer;
2239	>	dsNewValue:
2240	>	result := ActiveBuffer;
2241	>	dsOldValue:
2242	>	if (PRecordData(ActiveBuffer)^.rdRecordNumber =
2243	>	PRecordData(FOldBuffer)^.rdRecordNumber) then
2244	>	result := FOldBuffer
2245	>	else
2246	>	result := ActiveBuffer;
2247	>	else if not FOpen then
2248	>	result := nil
2249	>	else
2250	>	result := ActiveBuffer;
2251	>	end;
2252	>	end;
2253	>
2254	>	function TIBCustomDataSet.CachedUpdateStatus: TCachedUpdateStatus;
2255	>	begin
2256	>	if Active then
2257	>	result := PRecordData(GetActiveBuf)^.rdCachedUpdateStatus
2258	>	else
2259	>	result := cusUnmodified;
2260	>	end;
2261	>
2262	>	function TIBCustomDataSet.GetDatabase: TIBDatabase;
2263	>	begin
2264	>	result := FBase.Database;
2265	>	end;
2266	>
2267	>	function TIBCustomDataSet.GetDeleteSQL: TStrings;
2268	>	begin
2269	>	result := FQDelete.SQL;
2270	>	end;
2271	>
2272	>	function TIBCustomDataSet.GetInsertSQL: TStrings;
2273	>	begin
2274	>	result := FQInsert.SQL;
2275	>	end;
2276	>
2277	>	function TIBCustomDataSet.GetSQLParams: ISQLParams;
2278	>	begin
2279	>	if not FInternalPrepared then
2280	>	InternalPrepare;
2281	>	result := FQSelect.Params;
2282	>	end;
2283	>
2284	>	function TIBCustomDataSet.GetRefreshSQL: TStrings;
2285	>	begin
2286	>	result := FQRefresh.SQL;
2287	>	end;
2288	>
2289	>	function TIBCustomDataSet.GetSelectSQL: TStrings;
2290	>	begin
2291	>	result := FQSelect.SQL;
2292	>	end;
2293	>
2294	>	function TIBCustomDataSet.GetStatementType: TIBSQLStatementTypes;
2295	>	begin
2296	>	result := FQSelect.SQLStatementType;
2297	>	end;
2298	>
2299	>	function TIBCustomDataSet.GetModifySQL: TStrings;
2300	>	begin
2301	>	result := FQModify.SQL;
2302	>	end;
2303	>
2304	>	function TIBCustomDataSet.GetTransaction: TIBTransaction;
2305	>	begin
2306	>	result := FBase.Transaction;
2307	>	end;
2308	>
2309	>	procedure TIBCustomDataSet.InternalDeleteRecord(Qry: TIBSQL; Buff: Pointer);
2310	>	begin
2311	>	if (Assigned(FUpdateObject) and (FUpdateObject.GetSQL(ukDelete).Text <> '')) then
2312	>	FUpdateObject.Apply(ukDelete,Buff)
2313	>	else
2314	>	begin
2315	>	SetInternalSQLParams(FQDelete.Params, Buff);
2316	>	FQDelete.ExecQuery;
2317	>	end;
2318	>	with PRecordData(Buff)^ do
2319	>	begin
2320	>	rdUpdateStatus := usDeleted;
2321	>	rdCachedUpdateStatus := cusUnmodified;
2322	>	end;
2323	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2324	>	end;
2325	>
2326	>	function TIBCustomDataSet.InternalLocate(const KeyFields: string;
2327	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
2328	>	var
2329	>	keyFieldList: TList;
2330	>	CurBookmark: TBookmark;
2331	>	fieldValue: Variant;
2332	>	lookupValues: array of variant;
2333	>	i, fieldCount: Integer;
2334	>	fieldValueAsString: string;
2335	>	lookupValueAsString: string;
2336	>	begin
2337	>	keyFieldList := TList.Create;
2338	>	try
2339	>	GetFieldList(keyFieldList, KeyFields);
2340	>	fieldCount := keyFieldList.Count;
2341	>	CurBookmark := Bookmark;
2342	>	result := false;
2343	>	SetLength(lookupValues, fieldCount);
2344	>	if not EOF then
2345	>	begin
2346	>	for i := 0 to fieldCount - 1 do  {expand key values into lookupValues array}
2347	>	begin
2348	>	if VarIsArray(KeyValues) then
2349	>	lookupValues[i] := KeyValues[i]
2350	>	else
2351	>	if i > 0 then
2352	>	lookupValues[i] := NULL
2353	>	else
2354	>	lookupValues[0] := KeyValues;
2355	>
2356	>	{convert to upper case is case insensitive search}
2357	>	if (TField(keyFieldList[i]).DataType = ftString) and
2358	>	not VarIsNull(lookupValues[i]) and (loCaseInsensitive in Options) then
2359	>	lookupValues[i] := UpperCase(lookupValues[i]);
2360	>	end;
2361	>	end;
2362	>	while not result and not EOF do   {search for a matching record}
2363	>	begin
2364	>	i := 0;
2365	>	result := true;
2366	>	while result and (i < fieldCount) do
2367	>	{see if all of the key fields matches}
2368	>	begin
2369	>	fieldValue := TField(keyFieldList[i]).Value;
2370	>	result := not (VarIsNull(fieldValue) xor VarIsNull(lookupValues[i]));
2371	>	if result and not VarIsNull(fieldValue) then
2372	>	begin
2373	>	try
2374	>	if TField(keyFieldList[i]).DataType = ftString then
2375	>	begin
2376	>	{strings need special handling because of the locate options that
2377	>	apply to them}
2378	>	fieldValueAsString := TField(keyFieldList[i]).AsString;
2379	>	lookupValueAsString := lookupValues[i];
2380	>	if (loCaseInsensitive in Options) then
2381	>	fieldValueAsString := UpperCase(fieldValueAsString);
2382	>
2383	>	if (loPartialKey in Options) then
2384	>	result := result and (Pos(lookupValueAsString, fieldValueAsString) = 1)
2385	>	else
2386	>	result := result and (fieldValueAsString = lookupValueAsString);
2387	>	end
2388	>	else
2389	>	result := result and (lookupValues[i] =
2390	>	VarAsType(fieldValue, VarType(lookupValues[i])));
2391	>	except on EVariantError do
2392	>	result := False;
2393	>	end;
2394	>	end;
2395	>	Inc(i);
2396	>	end;
2397	>	if not result then
2398	>	Next;
2399	>	end;
2400	>	if not result then
2401	>	Bookmark := CurBookmark
2402	>	else
2403	>	CursorPosChanged;
2404	>	finally
2405	>	keyFieldList.Free;
2406	>	SetLength(lookupValues,0)
2407	>	end;
2408	>	end;
2409	>
2410	>	procedure TIBCustomDataSet.InternalPostRecord(Qry: TIBSQL; Buff: Pointer);
2411	>	var
2412	>	i, j, k, arr: Integer;
2413	>	pbd: PBlobDataArray;
2414	>	pda: PArrayDataArray;
2415	>	begin
2416	>	pbd := PBlobDataArray(PChar(Buff) + FBlobCacheOffset);
2417	>	pda := PArrayDataArray(PChar(Buff) + FArrayCacheOffset);
2418	>	j := 0; arr := 0;
2419	>	for i := 0 to FieldCount - 1 do
2420	>	if Fields[i].IsBlob then
2421	>	begin
2422	>	k := FMappedFieldPosition[Fields[i].FieldNo -1];
2423	>	if pbd^[j] <> nil then
2424	>	begin
2425	>	pbd^[j].Finalize;
2426	>	PISC_QUAD(
2427	>	PChar(Buff) + FFieldColumns^[k].fdDataOfs)^ :=
2428	>	pbd^[j].BlobID;
2429	>	PRecordData(Buff)^.rdFields[k].fdIsNull := pbd^[j].Size = 0;
2430	>	end
2431	>	else
2432	>	begin
2433	>	PRecordData(Buff)^.rdFields[k].fdIsNull := true;
2434	>	with PISC_QUAD(PChar(Buff) + FFieldColumns^[k].fdDataOfs)^ do
2435	>	begin
2436	>	gds_quad_high := 0;
2437	>	gds_quad_low := 0;
2438	>	end;
2439	>	end;
2440	>	Inc(j);
2441	>	end
2442	>	else
2443	>	if Fields[i] is TIBArrayField then
2444	>	begin
2445	>	if pda^[arr] <> nil then
2446	>	begin
2447	>	k := FMappedFieldPosition[Fields[i].FieldNo -1];
2448	>	PISC_QUAD(
2449	>	PChar(Buff) + FFieldColumns^[k].fdDataOfs)^ :=  pda^[arr].ArrayIntf.GetArrayID;
2450	>	PRecordData(Buff)^.rdFields[k].fdIsNull := pda^[arr].ArrayIntf.IsEmpty;
2451	>	end;
2452	>	Inc(arr);
2453	>	end;
2454	>	if Assigned(FUpdateObject) then
2455	>	begin
2456	>	if (Qry = FQDelete) then
2457	>	FUpdateObject.Apply(ukDelete,Buff)
2458	>	else if (Qry = FQInsert) then
2459	>	FUpdateObject.Apply(ukInsert,Buff)
2460	>	else
2461	>	FUpdateObject.Apply(ukModify,Buff);
2462	>	end
2463	>	else begin
2464	>	SetInternalSQLParams(Qry.Params, Buff);
2465	>	Qry.ExecQuery;
2466	>	end;
2467	>	if Qry.FieldCount > 0 then {Has RETURNING Clause}
2468	>	UpdateRecordFromQuery(Qry.Current,Buff);
2469	>	PRecordData(Buff)^.rdUpdateStatus := usUnmodified;
2470	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
2471	>	SetModified(False);
2472	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2473	>	if (FForcedRefresh or FNeedsRefresh) and CanRefresh then
2474	>	InternalRefreshRow;
2475	>	end;
2476	>
2477	>	procedure TIBCustomDataSet.InternalRefreshRow;
2478	>	var
2479	>	Buff: PChar;
2480	>	ofs: DWORD;
2481	>	Qry: TIBSQL;
2482	>	begin
2483	>	FBase.SetCursor;
2484	>	try
2485	>	Buff := GetActiveBuf;
2486	>	if CanRefresh then
2487	>	begin
2488	>	if Buff <> nil then
2489	>	begin
2490	>	if (Assigned(FUpdateObject) and (FUpdateObject.RefreshSQL.Text <> '')) then
2491	>	begin
2492	>	Qry := TIBSQL.Create(self);
2493	>	Qry.Database := Database;
2494	>	Qry.Transaction := Transaction;
2495	>	Qry.GoToFirstRecordOnExecute := False;
2496	>	Qry.SQL.Text := FUpdateObject.RefreshSQL.Text;
2497	>	end
2498	>	else
2499	>	Qry := FQRefresh;
2500	>	SetInternalSQLParams(Qry.Params, Buff);
2501	>	Qry.ExecQuery;
2502	>	try
2503	>	if (Qry.SQLStatementType = SQLExecProcedure) or Qry.Next then
2504	>	begin
2505	>	ofs := PRecordData(Buff)^.rdSavedOffset;
2506	>	FetchCurrentRecordToBuffer(Qry,
2507	>	PRecordData(Buff)^.rdRecordNumber,
2508	>	Buff);
2509	>	if FCachedUpdates and (ofs <> $FFFFFFFF) then
2510	>	begin
2511	>	PRecordData(Buff)^.rdSavedOffset := ofs;
2512	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
2513	>	SaveOldBuffer(Buff);
2514	>	end;
2515	>	end;
2516	>	finally
2517	>	Qry.Close;
2518	>	end;
2519	>	if Qry <> FQRefresh then
2520	>	Qry.Free;
2521	>	end
2522	>	end
2523	>	else
2524	>	IBError(ibxeCannotRefresh, [nil]);
2525	>	finally
2526	>	FBase.RestoreCursor;
2527	>	end;
2528	>	end;
2529	>
2530	>	procedure TIBCustomDataSet.InternalRevertRecord(RecordNumber: Integer);
2531	>	var
2532	>	NewBuffer, OldBuffer: PRecordData;
2533	>
2534	>	begin
2535	>	NewBuffer := nil;
2536	>	OldBuffer := nil;
2537	>	NewBuffer := PRecordData(AllocRecordBuffer);
2538	>	OldBuffer := PRecordData(AllocRecordBuffer);
2539	>	try
2540	>	ReadRecordCache(RecordNumber, PChar(NewBuffer), False);
2541	>	ReadRecordCache(RecordNumber, PChar(OldBuffer), True);
2542	>	case NewBuffer^.rdCachedUpdateStatus of
2543	>	cusInserted:
2544	>	begin
2545	>	NewBuffer^.rdCachedUpdateStatus := cusUninserted;
2546	>	Inc(FDeletedRecords);
2547	>	end;
2548	>	cusModified,
2549	>	cusDeleted:
2550	>	begin
2551	>	if (NewBuffer^.rdCachedUpdateStatus = cusDeleted) then
2552	>	Dec(FDeletedRecords);
2553	>	CopyRecordBuffer(OldBuffer, NewBuffer);
2554	>	end;
2555	>	end;
2556	>
2557	>	if State in dsEditModes then
2558	>	Cancel;
2559	>
2560	>	WriteRecordCache(RecordNumber, PChar(NewBuffer));
2561	>
2562	>	if (NewBuffer^.rdCachedUpdateStatus = cusUninserted ) then
2563	>	ReSync([]);
2564	>	finally
2565	>	FreeRecordBuffer(PChar(NewBuffer));
2566	>	FreeRecordBuffer(PChar(OldBuffer));
2567	>	end;
2568	>	end;
2569	>
2570	>	{ A visible record is one that is not truly deleted,
2571	>	and it is also listed in the FUpdateRecordTypes set }
2572	>
2573	>	function TIBCustomDataSet.IsVisible(Buffer: PChar): Boolean;
2574	>	begin
2575	>	result := True;
2576	>	if not (State = dsOldValue) then
2577	>	result :=
2578	>	(PRecordData(Buffer)^.rdCachedUpdateStatus in FUpdateRecordTypes) and
2579	>	(not ((PRecordData(Buffer)^.rdCachedUpdateStatus = cusUnmodified) and
2580	>	(PRecordData(Buffer)^.rdUpdateStatus = usDeleted)));
2581	>	end;
2582	>
2583	>
2584	>	function TIBCustomDataSet.LocateNext(const KeyFields: string;
2585	>	const KeyValues: Variant; Options: TLocateOptions): Boolean;
2586	>	begin
2587	>	DisableControls;
2588	>	try
2589	>	result := InternalLocate(KeyFields, KeyValues, Options);
2590	>	finally
2591	>	EnableControls;
2592	>	end;
2593	>	end;
2594	>
2595	>	procedure TIBCustomDataSet.InternalPrepare;
2596	>	begin
2597	>	if FInternalPrepared then
2598	>	Exit;
2599	>	FBase.SetCursor;
2600	>	try
2601	>	ActivateConnection;
2602	>	ActivateTransaction;
2603	>	FBase.CheckDatabase;
2604	>	FBase.CheckTransaction;
2605	>	if HasParser and (FParser.SQLText <> FQSelect.SQL.Text) then
2606	>	begin
2607	>	FQSelect.OnSQLChanged := nil; {Do not react to change}
2608	>	try
2609	>	FQSelect.SQL.Text := FParser.SQLText;
2610	>	finally
2611	>	FQSelect.OnSQLChanged := SQLChanged;
2612	>	end;
2613	>	end;
2614	>	//   writeln( FQSelect.SQL.Text);
2615	>	if FQSelect.SQL.Text <> '' then
2616	>	begin
2617	>	if not FQSelect.Prepared then
2618	>	begin
2619	>	FQSelect.GenerateParamNames := FGenerateParamNames;
2620	>	FQSelect.ParamCheck := ParamCheck;
2621	>	FQSelect.Prepare;
2622	>	end;
2623	>	FQDelete.GenerateParamNames := FGenerateParamNames;
2624	>	if (Trim(FQDelete.SQL.Text) <> '') and (not FQDelete.Prepared) then
2625	>	FQDelete.Prepare;
2626	>	FQInsert.GenerateParamNames := FGenerateParamNames;
2627	>	if (Trim(FQInsert.SQL.Text) <> '') and (not FQInsert.Prepared) then
2628	>	FQInsert.Prepare;
2629	>	FQRefresh.GenerateParamNames := FGenerateParamNames;
2630	>	if (Trim(FQRefresh.SQL.Text) <> '') and (not FQRefresh.Prepared) then
2631	>	FQRefresh.Prepare;
2632	>	FQModify.GenerateParamNames := FGenerateParamNames;
2633	>	if (Trim(FQModify.SQL.Text) <> '') and (not FQModify.Prepared) then
2634	>	FQModify.Prepare;
2635	>	FInternalPrepared := True;
2636	>	InternalInitFieldDefs;
2637	>	end else
2638	>	IBError(ibxeEmptyQuery, [nil]);
2639	>	finally
2640	>	FBase.RestoreCursor;
2641	>	end;
2642	>	end;
2643	>
2644	>	procedure TIBCustomDataSet.RecordModified(Value: Boolean);
2645	>	begin
2646	>	SetModified(Value);
2647	>	end;
2648	>
2649	>	procedure TIBCustomDataSet.RevertRecord;
2650	>	var
2651	>	Buff: PRecordData;
2652	>	begin
2653	>	if FCachedUpdates and FUpdatesPending then
2654	>	begin
2655	>	Buff := PRecordData(GetActiveBuf);
2656	>	InternalRevertRecord(Buff^.rdRecordNumber);
2657	>	ReadRecordCache(Buff^.rdRecordNumber, PChar(Buff), False);
2658	>	DataEvent(deRecordChange, 0);
2659	>	end;
2660	>	end;
2661	>
2662	>	procedure TIBCustomDataSet.SaveOldBuffer(Buffer: PChar);
2663	>	var
2664	>	OldBuffer: Pointer;
2665	>	procedure CopyOldBuffer;
2666	>	begin
2667	>	CopyRecordBuffer(Buffer, OldBuffer);
2668	>	if BlobFieldCount > 0 then
2669	>	FillChar(PChar(OldBuffer)[FBlobCacheOffset],
2670	>	BlobFieldCount * SizeOf(TIBBlobStream) + ArrayFieldCount * SizeOf(IArray),
2671	>	0);
2672	>	end;
2673	>
2674	>	begin
2675	>	if (Buffer <> nil) and (PRecordData(Buffer)^.rdRecordNumber >= 0) then
2676	>	begin
2677	>	OldBuffer := AllocRecordBuffer;
2678	>	try
2679	>	if (PRecordData(Buffer)^.rdSavedOffset = $FFFFFFFF) then
2680	>	begin
2681	>	PRecordData(Buffer)^.rdSavedOffset := AdjustPosition(FOldBufferCache, 0,
2682	>	FILE_END);
2683	>	CopyOldBuffer;
2684	>	WriteCache(FOldBufferCache, 0, FILE_CURRENT, OldBuffer);
2685	>	WriteCache(FBufferCache, PRecordData(Buffer)^.rdRecordNumber * FRecordBufferSize,
2686	>	FILE_BEGIN, Buffer);
2687	>	end
2688	>	else begin
2689	>	CopyOldBuffer;
2690	>	WriteCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
2691	>	OldBuffer);
2692	>	end;
2693	>	finally
2694	>	FreeRecordBuffer(PChar(OldBuffer));
2695	>	end;
2696	>	end;
2697	>	end;
2698	>
2699	>	procedure TIBCustomDataSet.SetBufferChunks(Value: Integer);
2700	>	begin
2701	>	if (Value <= 0) then
2702	>	FBufferChunks := BufferCacheSize
2703	>	else
2704	>	FBufferChunks := Value;
2705	>	end;
2706	>
2707	>	procedure TIBCustomDataSet.SetDatabase(Value: TIBDatabase);
2708	>	begin
2709	>	if (FBase.Database <> Value) then
2710	>	begin
2711	>	CheckDatasetClosed;
2712	>	InternalUnPrepare;
2713	>	FBase.Database := Value;
2714	>	FQDelete.Database := Value;
2715	>	FQInsert.Database := Value;
2716	>	FQRefresh.Database := Value;
2717	>	FQSelect.Database := Value;
2718	>	FQModify.Database := Value;
2719	>	FDatabaseInfo.Database := Value;
2720	>	end;
2721	>	end;
2722	>
2723	>	procedure TIBCustomDataSet.SetDeleteSQL(Value: TStrings);
2724	>	begin
2725	>	if FQDelete.SQL.Text <> Value.Text then
2726	>	begin
2727	>	Disconnect;
2728	>	FQDelete.SQL.Assign(Value);
2729	>	end;
2730	>	end;
2731	>
2732	>	procedure TIBCustomDataSet.SetInsertSQL(Value: TStrings);
2733	>	begin
2734	>	if FQInsert.SQL.Text <> Value.Text then
2735	>	begin
2736	>	Disconnect;
2737	>	FQInsert.SQL.Assign(Value);
2738	>	end;
2739	>	end;
2740	>
2741	>	procedure TIBCustomDataSet.SetInternalSQLParams(Params: ISQLParams; Buffer: Pointer);
2742	>	var
2743	>	i, j: Integer;
2744	>	cr, data: PChar;
2745	>	fn: string;
2746	>	st: RawByteString;
2747	>	OldBuffer: Pointer;
2748	>	ts: TTimeStamp;
2749	>	Param: ISQLParam;
2750	>	begin
2751	>	if (Buffer = nil) then
2752	>	IBError(ibxeBufferNotSet, [nil]);
2753	>	if (not FInternalPrepared) then
2754	>	InternalPrepare;
2755	>	OldBuffer := nil;
2756	>	try
2757	>	for i := 0 to Params.GetCount - 1 do
2758	>	begin
2759	>	Param := Params[i];
2760	>	fn := Param.Name;
2761	>	if (Pos('OLD_', fn) = 1) then {mbcs ok}
2762	>	begin
2763	>	fn := Copy(fn, 5, Length(fn));
2764	>	if not Assigned(OldBuffer) then
2765	>	begin
2766	>	OldBuffer := AllocRecordBuffer;
2767	>	ReadRecordCache(PRecordData(Buffer)^.rdRecordNumber, OldBuffer, True);
2768	>	end;
2769	>	cr := OldBuffer;
2770	>	end
2771	>	else if (Pos('NEW_', fn) = 1) then {mbcs ok}
2772	>	begin
2773	>	fn := Copy(fn, 5, Length(fn));
2774	>	cr := Buffer;
2775	>	end
2776	>	else
2777	>	cr := Buffer;
2778	>	j := FQSelect.FieldIndex[fn] + 1;
2779	>	if (j > 0) then
2780	>	with PRecordData(cr)^,rdFields[j], FFieldColumns^[j] do
2781	>	begin
2782	>	if Param.name = 'IBX_INTERNAL_DBKEY' then {do not localize}
2783	>	begin
2784	>	PIBDBKey(Param.AsPointer)^ := rdDBKey;
2785	>	continue;
2786	>	end;
2787	>	if fdIsNull then
2788	>	Param.IsNull := True
2789	>	else begin
2790	>	Param.IsNull := False;
2791	>	data := cr + fdDataOfs;
2792	>	case fdDataType of
2793	>	SQL_TEXT, SQL_VARYING:
2794	>	begin
2795	>	SetString(st, data, fdDataLength);
2796	>	SetCodePage(st,fdCodePage,false);
2797	>	Param.AsString := st;
2798	>	end;
2799	>	SQL_FLOAT, SQL_DOUBLE, SQL_D_FLOAT:
2800	>	Param.AsDouble := PDouble(data)^;
2801	>	SQL_SHORT, SQL_LONG:
2802	>	begin
2803	>	if fdDataScale = 0 then
2804	>	Param.AsLong := PLong(data)^
2805	>	else
2806	>	if fdDataScale >= (-4) then
2807	>	Param.AsCurrency := PCurrency(data)^
2808	>	else
2809	>	Param.AsDouble := PDouble(data)^;
2810	>	end;
2811	>	SQL_INT64:
2812	>	begin
2813	>	if fdDataScale = 0 then
2814	>	Param.AsInt64 := PInt64(data)^
2815	>	else
2816	>	if fdDataScale >= (-4) then
2817	>	Param.AsCurrency := PCurrency(data)^
2818	>	else
2819	>	Param.AsDouble := PDouble(data)^;
2820	>	end;
2821	>	SQL_BLOB, SQL_ARRAY, SQL_QUAD:
2822	>	Param.AsQuad := PISC_QUAD(data)^;
2823	>	SQL_TYPE_DATE:
2824	>	begin
2825	>	ts.Date := PInt(data)^;
2826	>	ts.Time := 0;
2827	>	Param.AsDate := TimeStampToDateTime(ts);
2828	>	end;
2829	>	SQL_TYPE_TIME:
2830	>	begin
2831	>	ts.Date := 0;
2832	>	ts.Time := PInt(data)^;
2833	>	Param.AsTime := TimeStampToDateTime(ts);
2834	>	end;
2835	>	SQL_TIMESTAMP:
2836	>	Param.AsDateTime :=
2837	>	TimeStampToDateTime(MSecsToTimeStamp(trunc(PDouble(data)^)));
2838	>	SQL_BOOLEAN:
2839	>	Param.AsBoolean := PWordBool(data)^;
2840	>	end;
2841	>	end;
2842	>	end;
2843	>	end;
2844	>	finally
2845	>	if (OldBuffer <> nil) then
2846	>	FreeRecordBuffer(PChar(OldBuffer));
2847	>	end;
2848	>	end;
2849	>
2850	>	procedure TIBCustomDataSet.SetRefreshSQL(Value: TStrings);
2851	>	begin
2852	>	if FQRefresh.SQL.Text <> Value.Text then
2853	>	begin
2854	>	Disconnect;
2855	>	FQRefresh.SQL.Assign(Value);
2856	>	end;
2857	>	end;
2858	>
2859	>	procedure TIBCustomDataSet.SetSelectSQL(Value: TStrings);
2860	>	begin
2861	>	if FQSelect.SQL.Text <> Value.Text then
2862	>	begin
2863	>	Disconnect;
2864	>	FQSelect.SQL.Assign(Value);
2865	>	end;
2866	>	end;
2867	>
2868	>	procedure TIBCustomDataSet.SetModifySQL(Value: TStrings);
2869	>	begin
2870	>	if FQModify.SQL.Text <> Value.Text then
2871	>	begin
2872	>	Disconnect;
2873	>	FQModify.SQL.Assign(Value);
2874	>	end;
2875	>	end;
2876	>
2877	>	procedure TIBCustomDataSet.SetTransaction(Value: TIBTransaction);
2878	>	begin
2879	>	if (FBase.Transaction <> Value) then
2880	>	begin
2881	>	CheckDatasetClosed;
2882	>	FBase.Transaction := Value;
2883	>	FQDelete.Transaction := Value;
2884	>	FQInsert.Transaction := Value;
2885	>	FQRefresh.Transaction := Value;
2886	>	FQSelect.Transaction := Value;
2887	>	FQModify.Transaction := Value;
2888	>	end;
2889	>	end;
2890	>
2891	>	procedure TIBCustomDataSet.SetUniDirectional(Value: Boolean);
2892	>	begin
2893	>	CheckDatasetClosed;
2894	>	FUniDirectional := Value;
2895	>	end;
2896	>
2897	>	procedure TIBCustomDataSet.SetUpdateRecordTypes(Value: TIBUpdateRecordTypes);
2898	>	begin
2899	>	FUpdateRecordTypes := Value;
2900	>	if Active then
2901	>	First;
2902	>	end;
2903	>
2904	>	procedure TIBCustomDataSet.RefreshParams;
2905	>	var
2906	>	DataSet: TDataSet;
2907	>	begin
2908	>	DisableControls;
2909	>	try
2910	>	if FDataLink.DataSource <> nil then
2911	>	begin
2912	>	DataSet := FDataLink.DataSource.DataSet;
2913	>	if DataSet <> nil then
2914	>	if DataSet.Active and (DataSet.State <> dsSetKey) then
2915	>	begin
2916	>	Close;
2917	>	Open;
2918	>	end;
2919	>	end;
2920	>	finally
2921	>	EnableControls;
2922	>	end;
2923	>	end;
2924	>
2925	>	procedure TIBCustomDataSet.RegisterIBLink(Sender: TIBControlLink);
2926	>	begin
2927	>	if FIBLinks.IndexOf(Sender) = -1 then
2928	>	FIBLinks.Add(Sender);
2929	>	end;
2930	>
2931	>
2932	>	procedure TIBCustomDataSet.SQLChanging(Sender: TObject);
2933	>	begin
2934	>	Active := false;
2935	>	{  if FOpen then
2936	>	InternalClose;}
2937	>	if FInternalPrepared then
2938	>	InternalUnPrepare;
2939	>	FieldDefs.Clear;
2940	>	FieldDefs.Updated := false;
2941	>	end;
2942	>
2943	>	procedure TIBCustomDataSet.SQLChanged(Sender: TObject);
2944	>	begin
2945	>	FBaseSQLSelect.assign(FQSelect.SQL);
2946	>	end;
2947	>
2948	>	{ I can "undelete" uninserted records (make them "inserted" again).
2949	>	I can "undelete" cached deleted (the deletion hasn't yet occurred) }
2950	>	procedure TIBCustomDataSet.Undelete;
2951	>	var
2952	>	Buff: PRecordData;
2953	>	begin
2954	>	CheckActive;
2955	>	Buff := PRecordData(GetActiveBuf);
2956	>	with Buff^ do
2957	>	begin
2958	>	if rdCachedUpdateStatus = cusUninserted then
2959	>	begin
2960	>	rdCachedUpdateStatus := cusInserted;
2961	>	Dec(FDeletedRecords);
2962	>	end
2963	>	else if (rdUpdateStatus = usDeleted) and
2964	>	(rdCachedUpdateStatus = cusDeleted) then
2965	>	begin
2966	>	rdCachedUpdateStatus := cusUnmodified;
2967	>	rdUpdateStatus := usUnmodified;
2968	>	Dec(FDeletedRecords);
2969	>	end;
2970	>	WriteRecordCache(rdRecordNumber, PChar(Buff));
2971	>	end;
2972	>	end;
2973	>
2974	>	procedure TIBCustomDataSet.UnRegisterIBLink(Sender: TIBControlLink);
2975	>	begin
2976	>	FIBLinks.Remove(Sender);
2977	>	end;
2978	>
2979	>	function TIBCustomDataSet.UpdateStatus: TUpdateStatus;
2980	>	begin
2981	>	if Active then
2982	>	if GetActiveBuf <> nil then
2983	>	result := PRecordData(GetActiveBuf)^.rdUpdateStatus
2984	>	else
2985	>	result := usUnmodified
2986	>	else
2987	>	result := usUnmodified;
2988	>	end;
2989	>
2990	>	function TIBCustomDataSet.IsSequenced: Boolean;
2991	>	begin
2992	>	Result := Assigned( FQSelect ) and FQSelect.EOF;
2993	>	end;
2994	>
2995	>	function TIBCustomDataSet.ParamByName(ParamName: String): ISQLParam;
2996	>	begin
2997	>	ActivateConnection;
2998	>	ActivateTransaction;
2999	>	if not FInternalPrepared then
3000	>	InternalPrepare;
3001	>	Result := Params.ByName(ParamName);
3002	>	end;
3003	>
3004	>	{Beware: the parameter FCache is used as an identifier to determine which
3005	>	cache is being operated on and is not referenced in the computation.
3006	>	The result is an adjusted offset into the identified cache, either the
3007	>	Buffer Cache or the old Buffer Cache.}
3008	>
3009	>	function TIBCustomDataSet.AdjustPosition(FCache: PChar; Offset: DWORD;
3010	>	Origin: Integer): DWORD;
3011	>	var
3012	>	OldCacheSize: Integer;
3013	>	begin
3014	>	if (FCache = FBufferCache) then
3015	>	begin
3016	>	case Origin of
3017	>	FILE_BEGIN:    FBPos := Offset;
3018	>	FILE_CURRENT:  FBPos := FBPos + Offset;
3019	>	FILE_END:      FBPos := DWORD(FBEnd) + Offset;
3020	>	end;
3021	>	OldCacheSize := FCacheSize;
3022	>	while (FBPos >= DWORD(FCacheSize)) do
3023	>	Inc(FCacheSize, FBufferChunkSize);
3024	>	if FCacheSize > OldCacheSize then
3025	>	IBAlloc(FBufferCache, FCacheSize, FCacheSize);
3026	>	result := FBPos;
3027	>	end
3028	>	else begin
3029	>	case Origin of
3030	>	FILE_BEGIN:    FOBPos := Offset;
3031	>	FILE_CURRENT:  FOBPos := FOBPos + Offset;
3032	>	FILE_END:      FOBPos := DWORD(FOBEnd) + Offset;
3033	>	end;
3034	>	OldCacheSize := FOldCacheSize;
3035	>	while (FBPos >= DWORD(FOldCacheSize)) do
3036	>	Inc(FOldCacheSize, FBufferChunkSize);
3037	>	if FOldCacheSize > OldCacheSize then
3038	>	IBAlloc(FOldBufferCache, FOldCacheSize, FOldCacheSize);
3039	>	result := FOBPos;
3040	>	end;
3041	>	end;
3042	>
3043	>	procedure TIBCustomDataSet.ReadCache(FCache: PChar; Offset: DWORD; Origin: Integer;
3044	>	Buffer: PChar);
3045	>	var
3046	>	pCache: PChar;
3047	>	AdjustedOffset: DWORD;
3048	>	bOld: Boolean;
3049	>	begin
3050	>	bOld := (FCache = FOldBufferCache);
3051	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
3052	>	if not bOld then
3053	>	pCache := FBufferCache + AdjustedOffset
3054	>	else
3055	>	pCache := FOldBufferCache + AdjustedOffset;
3056	>	Move(pCache^, Buffer^, DWORD(FRecordBufferSize));
3057	>	AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
3058	>	end;
3059	>
3060	>	procedure TIBCustomDataSet.ReadRecordCache(RecordNumber: Integer; Buffer: PChar;
3061	>	ReadOldBuffer: Boolean);
3062	>	begin
3063	>	if FUniDirectional then
3064	>	RecordNumber := RecordNumber mod UniCache;
3065	>	if (ReadOldBuffer) then
3066	>	begin
3067	>	ReadRecordCache(RecordNumber, Buffer, False);
3068	>	if FCachedUpdates and
3069	>	(PRecordData(Buffer)^.rdSavedOffset <> $FFFFFFFF) then
3070	>	ReadCache(FOldBufferCache, PRecordData(Buffer)^.rdSavedOffset, FILE_BEGIN,
3071	>	Buffer)
3072	>	else
3073	>	if ReadOldBuffer and
3074	>	(PRecordData(FOldBuffer)^.rdRecordNumber = RecordNumber) then
3075	>	CopyRecordBuffer( FOldBuffer, Buffer )
3076	>	end
3077	>	else
3078	>	ReadCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
3079	>	end;
3080	>
3081	>	procedure TIBCustomDataSet.WriteCache(FCache: PChar; Offset: DWORD; Origin: Integer;
3082	>	Buffer: PChar);
3083	>	var
3084	>	pCache: PChar;
3085	>	AdjustedOffset: DWORD;
3086	>	bOld: Boolean;
3087	>	dwEnd: DWORD;
3088	>	begin
3089	>	bOld := (FCache = FOldBufferCache);
3090	>	AdjustedOffset := AdjustPosition(FCache, Offset, Origin);
3091	>	if not bOld then
3092	>	pCache := FBufferCache + AdjustedOffset
3093	>	else
3094	>	pCache := FOldBufferCache + AdjustedOffset;
3095	>	Move(Buffer^, pCache^, FRecordBufferSize);
3096	>	dwEnd := AdjustPosition(FCache, FRecordBufferSize, FILE_CURRENT);
3097	>	if not bOld then
3098	>	begin
3099	>	if (dwEnd > FBEnd) then
3100	>	FBEnd := dwEnd;
3101	>	end
3102	>	else begin
3103	>	if (dwEnd > FOBEnd) then
3104	>	FOBEnd := dwEnd;
3105	>	end;
3106	>	end;
3107	>
3108	>	procedure TIBCustomDataSet.WriteRecordCache(RecordNumber: Integer; Buffer: PChar);
3109	>	begin
3110	>	if RecordNumber >= 0 then
3111	>	begin
3112	>	if FUniDirectional then
3113	>	RecordNumber := RecordNumber mod UniCache;
3114	>	WriteCache(FBufferCache, RecordNumber * FRecordBufferSize, FILE_BEGIN, Buffer);
3115	>	end;
3116	>	end;
3117	>
3118	>	function TIBCustomDataSet.AllocRecordBuffer: PChar;
3119	>	begin
3120	>	result := nil;
3121	>	IBAlloc(result, FRecordBufferSize, FRecordBufferSize);
3122	>	Move(FModelBuffer^, result^, FRecordBufferSize);
3123	>	end;
3124	>
3125	>	function TIBCustomDataSet.CreateBlobStream(Field: TField; Mode: TBlobStreamMode): TStream;
3126	>	var
3127	>	pb: PBlobDataArray;
3128	>	fs: TIBBlobStream;
3129	>	Buff: PChar;
3130	>	bTr, bDB: Boolean;
3131	>	begin
3132	>	if (Field = nil) or (Field.DataSet <> self) then
3133	>	IBError(ibxFieldNotinDataSet,[Field.Name,Name]);
3134	>	Buff := GetActiveBuf;
3135	>	if Buff = nil then
3136	>	begin
3137	>	fs := TIBBlobStream.Create;
3138	>	fs.Mode := bmReadWrite;
3139	>	fs.Database := Database;
3140	>	fs.Transaction := Transaction;
3141	>	fs.SetField(Field);
3142	>	FBlobStreamList.Add(Pointer(fs));
3143	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
3144	>	exit;
3145	>	end;
3146	>	pb := PBlobDataArray(Buff + FBlobCacheOffset);
3147	>	if pb^[Field.Offset] = nil then
3148	>	begin
3149	>	AdjustRecordOnInsert(Buff);
3150	>	pb^[Field.Offset] := TIBBlobStream.Create;
3151	>	fs := pb^[Field.Offset];
3152	>	FBlobStreamList.Add(Pointer(fs));
3153	>	fs.Mode := bmReadWrite;
3154	>	fs.Database := Database;
3155	>	fs.Transaction := Transaction;
3156	>	fs.SetField(Field);
3157	>	fs.BlobID :=
3158	>	PISC_QUAD(@Buff[FFieldColumns^[FMappedFieldPosition[Field.FieldNo - 1]].fdDataOfs])^;
3159	>	if (CachedUpdates) then
3160	>	begin
3161	>	bTr := not Transaction.InTransaction;
3162	>	bDB := not Database.Connected;
3163	>	if bDB then
3164	>	Database.Open;
3165	>	if bTr then
3166	>	Transaction.StartTransaction;
3167	>	fs.Seek(0, soFromBeginning);
3168	>	if bTr then
3169	>	Transaction.Commit;
3170	>	if bDB then
3171	>	Database.Close;
3172	>	end;
3173	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
3174	>	end else
3175	>	fs := pb^[Field.Offset];
3176	>	result := TIBDSBlobStream.Create(Field, fs, Mode);
3177	>	end;
3178	>
3179	>	function TIBCustomDataSet.GetArray(Field: TIBArrayField): IArray;
3180	>	var Buff: PChar;
3181	>	pda: PArrayDataArray;
3182	>	bTr, bDB: Boolean;
3183	>	begin
3184	>	if (Field = nil) or (Field.DataSet <> self) then
3185	>	IBError(ibxFieldNotinDataSet,[Field.Name,Name]);
3186	>	Buff := GetActiveBuf;
3187	>	if Buff = nil then
3188	>	Result := Database.Attachment.CreateArray(Transaction.TransactionIntf,
3189	>	Field.FRelationName,Field.FieldName)
3190	>	else
3191	>	begin
3192	>	pda := PArrayDataArray(Buff + FArrayCacheOffset);
3193	>	if pda^[Field.FCacheOffset] = nil then
3194	>	begin
3195	>	AdjustRecordOnInsert(Buff);
3196	>	if Field.IsNull then
3197	>	Result := Database.Attachment.CreateArray(Transaction.TransactionIntf,
3198	>	Field.FRelationName,Field.FieldName)
3199	>	else
3200	>	Result := Database.Attachment.OpenArray(Transaction.TransactionIntf,
3201	>	Field.FRelationName,Field.FieldName,Field.ArrayID);
3202	>	pda^[Field.FCacheOffset] := TIBArray.Create(Field,Result);
3203	>	FArrayList.Add(pda^[Field.FCacheOffset]);
3204	>	if (CachedUpdates) then
3205	>	begin
3206	>	bTr := not Transaction.InTransaction;
3207	>	bDB := not Database.Connected;
3208	>	if bDB then
3209	>	Database.Open;
3210	>	if bTr then
3211	>	Transaction.StartTransaction;
3212	>	pda^[Field.FCacheOffset].ArrayIntf.PreLoad;
3213	>	if bTr then
3214	>	Transaction.Commit;
3215	>	if bDB then
3216	>	Database.Close;
3217	>	end;
3218	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
3219	>	end
3220	>	else
3221	>	Result := pda^[Field.FCacheOffset].ArrayIntf;
3222	>	end;
3223	>	end;
3224	>
3225	>	procedure TIBCustomDataSet.SetArrayIntf(AnArray: IArray; Field: TIBArrayField);
3226	>	var Buff: PChar;
3227	>	pda: PArrayDataArray;
3228	>	begin
3229	>	if (Field = nil) or (Field.DataSet <> self) then
3230	>	IBError(ibxFieldNotinDataSet,[Field.Name,Name]);
3231	>	Buff := GetActiveBuf;
3232	>	if Buff <> nil then
3233	>	begin
3234	>	AdjustRecordOnInsert(Buff);
3235	>	pda := PArrayDataArray(Buff + FArrayCacheOffset);
3236	>	pda^[Field.FCacheOffset].FArray := AnArray;
3237	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Pointer(Buff));
3238	>	end;
3239	>	end;
3240	>
3241	>	function TIBCustomDataSet.CompareBookmarks(Bookmark1, Bookmark2: TBookmark): Integer;
3242	>	const
3243	>	CMPLess = -1;
3244	>	CMPEql  =  0;
3245	>	CMPGtr  =  1;
3246	>	RetCodes: array[Boolean, Boolean] of ShortInt = ((2, CMPLess),
3247	>	(CMPGtr, CMPEql));
3248	>	begin
3249	>	result := RetCodes[Bookmark1 = nil, Bookmark2 = nil];
3250	>
3251	>	if Result = 2 then
3252	>	begin
3253	>	if PInteger(Bookmark1)^ < PInteger(Bookmark2)^ then
3254	>	Result := CMPLess
3255	>	else
3256	>	if PInteger(Bookmark1)^ > PInteger(Bookmark2)^ then
3257	>	Result := CMPGtr
3258	>	else
3259	>	Result := CMPEql;
3260	>	end;
3261	>	end;
3262	>
3263	>	procedure TIBCustomDataSet.DoBeforeDelete;
3264	>	var
3265	>	Buff: PRecordData;
3266	>	begin
3267	>	if not CanDelete then
3268	>	IBError(ibxeCannotDelete, [nil]);
3269	>	Buff := PRecordData(GetActiveBuf);
3270	>	if FCachedUpdates and
3271	>	(Buff^.rdCachedUpdateStatus in [cusUnmodified]) then
3272	>	SaveOldBuffer(PChar(Buff));
3273	>	inherited DoBeforeDelete;
3274	>	end;
3275	>
3276	>	procedure TIBCustomDataSet.DoAfterDelete;
3277	>	begin
3278	>	inherited DoAfterDelete;
3279	>	FBase.DoAfterDelete(self);
3280	>	InternalAutoCommit;
3281	>	end;
3282	>
3283	>	procedure TIBCustomDataSet.DoBeforeEdit;
3284	>	var
3285	>	Buff: PRecordData;
3286	>	begin
3287	>	Buff := PRecordData(GetActiveBuf);
3288	>	if not(CanEdit or (FQModify.SQL.Count <> 0) or
3289	>	(FCachedUpdates and Assigned(FOnUpdateRecord))) then
3290	>	IBError(ibxeCannotUpdate, [nil]);
3291	>	if FCachedUpdates and (Buff^.rdCachedUpdateStatus in [cusUnmodified, cusInserted]) then
3292	>	SaveOldBuffer(PChar(Buff));
3293	>	CopyRecordBuffer(GetActiveBuf, FOldBuffer);
3294	>	inherited DoBeforeEdit;
3295	>	end;
3296	>
3297	>	procedure TIBCustomDataSet.DoAfterEdit;
3298	>	begin
3299	>	inherited DoAfterEdit;
3300	>	FBase.DoAfterEdit(self);
3301	>	end;
3302	>
3303	>	procedure TIBCustomDataSet.DoBeforeInsert;
3304	>	begin
3305	>	if not CanInsert then
3306	>	IBError(ibxeCannotInsert, [nil]);
3307	>	inherited DoBeforeInsert;
3308	>	end;
3309	>
3310	>	procedure TIBCustomDataSet.DoAfterInsert;
3311	>	begin
3312	>	if GeneratorField.ApplyOnEvent = gaeOnNewRecord then
3313	>	GeneratorField.Apply;
3314	>	inherited DoAfterInsert;
3315	>	FBase.DoAfterInsert(self);
3316	>	end;
3317	>
3318	>	procedure TIBCustomDataSet.DoBeforeClose;
3319	>	begin
3320	>	inherited DoBeforeClose;
3321	>	if FInTransactionEnd and (FCloseAction = TARollback) then
3322	>	Exit;
3323	>	if State in [dsInsert,dsEdit] then
3324	>	begin
3325	>	if DataSetCloseAction = dcSaveChanges then
3326	>	Post;
3327	>	{Note this can fail with an exception e.g. due to
3328	>	database validation error. In which case the dataset remains open }
3329	>	end;
3330	>	if FCachedUpdates and FUpdatesPending and (DataSetCloseAction = dcSaveChanges) then
3331	>	ApplyUpdates;
3332	>	end;
3333	>
3334	>	procedure TIBCustomDataSet.DoBeforeOpen;
3335	>	var i: integer;
3336	>	begin
3337	>	if assigned(FParser) then
3338	>	FParser.Reset;
3339	>	for i := 0 to FIBLinks.Count - 1 do
3340	>	TIBControlLink(FIBLinks[i]).UpdateSQL(self);
3341	>	inherited DoBeforeOpen;
3342	>	for i := 0 to FIBLinks.Count - 1 do
3343	>	TIBControlLink(FIBLinks[i]).UpdateParams(self);
3344	>	end;
3345	>
3346	>	procedure TIBCustomDataSet.DoBeforePost;
3347	>	begin
3348	>	inherited DoBeforePost;
3349	>	if (State = dsInsert) and
3350	>	(GeneratorField.ApplyOnEvent = gaeOnPostRecord) then
3351	>	GeneratorField.Apply
3352	>	end;
3353	>
3354	>	procedure TIBCustomDataSet.DoAfterPost;
3355	>	begin
3356	>	inherited DoAfterPost;
3357	>	FBase.DoAfterPost(self);
3358	>	InternalAutoCommit;
3359	>	end;
3360	>
3361	>	procedure TIBCustomDataSet.FetchAll;
3362	>	var
3363	>	CurBookmark: TBookmark;
3364	>	begin
3365	>	FBase.SetCursor;
3366	>	try
3367	>	if FQSelect.EOF or not FQSelect.Open then
3368	>	exit;
3369	>	DisableControls;
3370	>	try
3371	>	CurBookmark := Bookmark;
3372	>	Last;
3373	>	Bookmark := CurBookmark;
3374	>	finally
3375	>	EnableControls;
3376	>	end;
3377	>	finally
3378	>	FBase.RestoreCursor;
3379	>	end;
3380	>	end;
3381	>
3382	>	procedure TIBCustomDataSet.FreeRecordBuffer(var Buffer: PChar);
3383	>	begin
3384	>	FreeMem(Buffer);
3385	>	Buffer := nil;
3386	>	end;
3387	>
3388	>	procedure TIBCustomDataSet.GetBookmarkData(Buffer: PChar; Data: Pointer);
3389	>	begin
3390	>	Move(PRecordData(Buffer)^.rdRecordNumber, Data^, BookmarkSize);
3391	>	end;
3392	>
3393	>	function TIBCustomDataSet.GetBookmarkFlag(Buffer: PChar): TBookmarkFlag;
3394	>	begin
3395	>	result := PRecordData(Buffer)^.rdBookmarkFlag;
3396	>	end;
3397	>
3398	>	function TIBCustomDataSet.GetCanModify: Boolean;
3399	>	begin
3400	>	result := (FQInsert.SQL.Text <> '') or
3401	>	(FQModify.SQL.Text <> '') or
3402	>	(FQDelete.SQL.Text <> '') or
3403	>	(Assigned(FUpdateObject));
3404	>	end;
3405	>
3406	>	function TIBCustomDataSet.GetCurrentRecord(Buffer: PChar): Boolean;
3407	>	begin
3408	>	if not IsEmpty and (GetBookmarkFlag(ActiveBuffer) = bfCurrent) then
3409	>	begin
3410	>	UpdateCursorPos;
3411	>	ReadRecordCache(PRecordData(ActiveBuffer)^.rdRecordNumber, Buffer, False);
3412	>	result := True;
3413	>	end
3414	>	else
3415	>	result := False;
3416	>	end;
3417	>
3418	>	function TIBCustomDataSet.GetDataSource: TDataSource;
3419	>	begin
3420	>	if FDataLink = nil then
3421	>	result := nil
3422	>	else
3423	>	result := FDataLink.DataSource;
3424	>	end;
3425	>
3426	>	function TIBCustomDataSet.GetDBAliasName(FieldNo: integer): string;
3427	>	begin
3428	>	Result := FAliasNameMap[FieldNo-1]
3429	>	end;
3430	>
3431	>	function TIBCustomDataSet.GetFieldDefFromAlias(aliasName: string): TFieldDef;
3432	>	var
3433	>	i: integer;
3434	>	begin
3435	>	Result := nil;
3436	>	for i := 0 to Length(FAliasNameMap) - 1 do
3437	>	if FAliasNameMap[i] = aliasName then
3438	>	begin
3439	>	Result := FieldDefs[i];
3440	>	Exit
3441	>	end;
3442	>	end;
3443	>
3444	>	function TIBCustomDataSet.GetFieldClass(FieldType: TFieldType): TFieldClass;
3445	>	begin
3446	>	Result := DefaultFieldClasses[FieldType];
3447	>	end;
3448	>
3449	>	function TIBCustomDataSet.GetFieldData(FieldNo: Integer; Buffer: Pointer): Boolean;
3450	>	begin
3451	>	result := GetFieldData(FieldByNumber(FieldNo), buffer);
3452	>	end;
3453	>
3454	>	function TIBCustomDataSet.InternalGetFieldData(Field: TField; Buffer: Pointer): Boolean;
3455	>	var
3456	>	Buff, Data: PChar;
3457	>	CurrentRecord: PRecordData;
3458	>	begin
3459	>	result := False;
3460	>	Buff := GetActiveBuf;
3461	>	if (Buff = nil) or
3462	>	(not IsVisible(Buff)) or not assigned(Field.DataSet) then
3463	>	exit;
3464	>	{ The intention here is to stuff the buffer with the data for the
3465	>	referenced field for the current record }
3466	>	CurrentRecord := PRecordData(Buff);
3467	>	if (Field.FieldNo < 0) then
3468	>	begin
3469	>	Inc(Buff, FRecordSize + Field.Offset);
3470	>	result := Boolean(Buff[0]);
3471	>	if result and (Buffer <> nil) then
3472	>	Move(Buff[1], Buffer^, Field.DataSize);
3473	>	end
3474	>	else
3475	>	if (FMappedFieldPosition[Field.FieldNo - 1] > 0) and
3476	>	(FMappedFieldPosition[Field.FieldNo - 1] <= CurrentRecord^.rdFieldCount) then
3477	>	with CurrentRecord^.rdFields[FMappedFieldPosition[Field.FieldNo - 1]],
3478	>	FFieldColumns^[FMappedFieldPosition[Field.FieldNo - 1]] do
3479	>	begin
3480	>	result := not fdIsNull;
3481	>	if result and (Buffer <> nil) then
3482	>	begin
3483	>	Data := Buff + fdDataOfs;
3484	>	if (fdDataType = SQL_VARYING) or (fdDataType = SQL_TEXT) then
3485	>	begin
3486	>	if fdDataLength < Field.DataSize then
3487	>	begin
3488	>	Move(Data^, Buffer^, fdDataLength);
3489	>	PChar(Buffer)[fdDataLength] := #0;
3490	>	end
3491	>	else
3492	>	IBError(ibxeFieldSizeError,[Field.FieldName])
3493	>	end
3494	>	else
3495	>	Move(Data^, Buffer^, Field.DataSize);
3496	>	end;
3497	>	end;
3498	>	end;
3499	>
3500	>	{ GetRecNo and SetRecNo both operate off of 1-based indexes as
3501	>	opposed to 0-based indexes.
3502	>	This is because we want LastRecordNumber/RecordCount = 1 }
3503	>
3504	>	function TIBCustomDataSet.GetRecNo: Integer;
3505	>	begin
3506	>	if GetActiveBuf = nil then
3507	>	result := 0
3508	>	else
3509	>	result := PRecordData(GetActiveBuf)^.rdRecordNumber + 1;
3510	>	end;
3511	>
3512	>	function TIBCustomDataSet.GetRecord(Buffer: PChar; GetMode: TGetMode;
3513	>	DoCheck: Boolean): TGetResult;
3514	>	var
3515	>	Accept: Boolean;
3516	>	SaveState: TDataSetState;
3517	>	begin
3518	>	Result := grOK;
3519	>	if Filtered and Assigned(OnFilterRecord) then
3520	>	begin
3521	>	Accept := False;
3522	>	SaveState := SetTempState(dsFilter);
3523	>	while not Accept do
3524	>	begin
3525	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
3526	>	if Result <> grOK then
3527	>	break;
3528	>	FFilterBuffer := Buffer;
3529	>	try
3530	>	Accept := True;
3531	>	OnFilterRecord(Self, Accept);
3532	>	if not Accept and (GetMode = gmCurrent) then
3533	>	GetMode := gmPrior;
3534	>	except
3535	>	//        FBase.HandleException(Self);
3536	>	end;
3537	>	end;
3538	>	RestoreState(SaveState);
3539	>	end
3540	>	else
3541	>	Result := InternalGetRecord(Buffer, GetMode, DoCheck);
3542	>	end;
3543	>
3544	>	function TIBCustomDataSet.InternalGetRecord(Buffer: PChar; GetMode: TGetMode;
3545	>	DoCheck: Boolean): TGetResult;
3546	>	begin
3547	>	result := grError;
3548	>	case GetMode of
3549	>	gmCurrent: begin
3550	>	if (FCurrentRecord >= 0) then begin
3551	>	if FCurrentRecord < FRecordCount then
3552	>	ReadRecordCache(FCurrentRecord, Buffer, False)
3553	>	else begin
3554	>	while (not FQSelect.EOF) and FQSelect.Next  and
3555	>	(FCurrentRecord >= FRecordCount) do begin
3556	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
3557	>	Inc(FRecordCount);
3558	>	end;
3559	>	FCurrentRecord := FRecordCount - 1;
3560	>	if (FCurrentRecord >= 0) then
3561	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3562	>	end;
3563	>	result := grOk;
3564	>	end else
3565	>	result := grBOF;
3566	>	end;
3567	>	gmNext: begin
3568	>	result := grOk;
3569	>	if FCurrentRecord = FRecordCount then
3570	>	result := grEOF
3571	>	else if FCurrentRecord = FRecordCount - 1 then begin
3572	>	if (not FQSelect.EOF) then begin
3573	>	FQSelect.Next;
3574	>	Inc(FCurrentRecord);
3575	>	end;
3576	>	if (FQSelect.EOF) then begin
3577	>	result := grEOF;
3578	>	end else begin
3579	>	Inc(FRecordCount);
3580	>	FetchCurrentRecordToBuffer(FQSelect, FCurrentRecord, Buffer);
3581	>	end;
3582	>	end else if (FCurrentRecord < FRecordCount) then begin
3583	>	Inc(FCurrentRecord);
3584	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3585	>	end;
3586	>	end;
3587	>	else { gmPrior }
3588	>	begin
3589	>	if (FCurrentRecord = 0) then begin
3590	>	Dec(FCurrentRecord);
3591	>	result := grBOF;
3592	>	end else if (FCurrentRecord > 0) and
3593	>	(FCurrentRecord <= FRecordCount) then begin
3594	>	Dec(FCurrentRecord);
3595	>	ReadRecordCache(FCurrentRecord, Buffer, False);
3596	>	result := grOk;
3597	>	end else if (FCurrentRecord = -1) then
3598	>	result := grBOF;
3599	>	end;
3600	>	end;
3601	>	if result = grOk then
3602	>	result := AdjustCurrentRecord(Buffer, GetMode);
3603	>	if result = grOk then with PRecordData(Buffer)^ do begin
3604	>	rdBookmarkFlag := bfCurrent;
3605	>	GetCalcFields(Buffer);
3606	>	end else if (result = grEOF) then begin
3607	>	CopyRecordBuffer(FModelBuffer, Buffer);
3608	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
3609	>	end else if (result = grBOF) then begin
3610	>	CopyRecordBuffer(FModelBuffer, Buffer);
3611	>	PRecordData(Buffer)^.rdBookmarkFlag := bfBOF;
3612	>	end else if (result = grError) then begin
3613	>	CopyRecordBuffer(FModelBuffer, Buffer);
3614	>	PRecordData(Buffer)^.rdBookmarkFlag := bfEOF;
3615	>	end;;
3616	>	end;
3617	>
3618	>	function TIBCustomDataSet.GetRecordCount: Integer;
3619	>	begin
3620	>	result := FRecordCount - FDeletedRecords;
3621	>	end;
3622	>
3623	>	function TIBCustomDataSet.GetRecordSize: Word;
3624	>	begin
3625	>	result := FRecordBufferSize;
3626	>	end;
3627	>
3628	>	procedure TIBCustomDataSet.InternalAutoCommit;
3629	>	begin
3630	>	with Transaction do
3631	>	if InTransaction and (FAutoCommit = acCommitRetaining) then
3632	>	begin
3633	>	if CachedUpdates then ApplyUpdates;
3634	>	CommitRetaining;
3635	>	end;
3636	>	end;
3637	>
3638	>	procedure TIBCustomDataSet.InternalAddRecord(Buffer: Pointer; Append: Boolean);
3639	>	begin
3640	>	CheckEditState;
3641	>	begin
3642	>	{ When adding records, we *always* append.
3643	>	Insertion is just too costly }
3644	>	AdjustRecordOnInsert(Buffer);
3645	>	with PRecordData(Buffer)^ do
3646	>	begin
3647	>	rdUpdateStatus := usInserted;
3648	>	rdCachedUpdateStatus := cusInserted;
3649	>	end;
3650	>	if not CachedUpdates then
3651	>	InternalPostRecord(FQInsert, Buffer)
3652	>	else begin
3653	>	WriteRecordCache(FCurrentRecord, Buffer);
3654	>	FUpdatesPending := True;
3655	>	end;
3656	>	Inc(FRecordCount);
3657	>	InternalSetToRecord(Buffer);
3658	>	end
3659	>	end;
3660	>
3661	>	procedure TIBCustomDataSet.InternalCancel;
3662	>	var
3663	>	Buff: PChar;
3664	>	CurRec: Integer;
3665	>	pda: PArrayDataArray;
3666	>	i: integer;
3667	>	begin
3668	>	inherited InternalCancel;
3669	>	Buff := GetActiveBuf;
3670	>	if Buff <> nil then
3671	>	begin
3672	>	pda := PArrayDataArray(Buff + FArrayCacheOffset);
3673	>	for i := 0 to ArrayFieldCount - 1 do
3674	>	pda^[i].ArrayIntf.CancelChanges;
3675	>	CurRec := FCurrentRecord;
3676	>	AdjustRecordOnInsert(Buff);
3677	>	if (State = dsEdit) then begin
3678	>	CopyRecordBuffer(FOldBuffer, Buff);
3679	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3680	>	end else begin
3681	>	CopyRecordBuffer(FModelBuffer, Buff);
3682	>	PRecordData(Buff)^.rdUpdateStatus := usDeleted;
3683	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusUnmodified;
3684	>	PRecordData(Buff)^.rdBookmarkFlag := bfEOF;
3685	>	FCurrentRecord := CurRec;
3686	>	end;
3687	>	end;
3688	>	end;
3689	>
3690	>
3691	>	procedure TIBCustomDataSet.InternalClose;
3692	>	begin
3693	>	if FDidActivate then
3694	>	DeactivateTransaction;
3695	>	FQSelect.Close;
3696	>	ClearBlobCache;
3697	>	ClearArrayCache;
3698	>	FreeRecordBuffer(FModelBuffer);
3699	>	FreeRecordBuffer(FOldBuffer);
3700	>	FCurrentRecord := -1;
3701	>	FOpen := False;
3702	>	FRecordCount := 0;
3703	>	FDeletedRecords := 0;
3704	>	FRecordSize := 0;
3705	>	FBPos := 0;
3706	>	FOBPos := 0;
3707	>	FCacheSize := 0;
3708	>	FOldCacheSize := 0;
3709	>	FBEnd := 0;
3710	>	FOBEnd := 0;
3711	>	FreeMem(FBufferCache);
3712	>	FBufferCache := nil;
3713	>	FreeMem(FFieldColumns);
3714	>	FFieldColumns := nil;
3715	>	FreeMem(FOldBufferCache);
3716	>	FOldBufferCache := nil;
3717	>	BindFields(False);
3718	>	ResetParser;
3719	>	if DefaultFields then DestroyFields;
3720	>	end;
3721	>
3722	>	procedure TIBCustomDataSet.InternalDelete;
3723	>	var
3724	>	Buff: PChar;
3725	>	begin
3726	>	FBase.SetCursor;
3727	>	try
3728	>	Buff := GetActiveBuf;
3729	>	if CanDelete then
3730	>	begin
3731	>	if not CachedUpdates then
3732	>	InternalDeleteRecord(FQDelete, Buff)
3733	>	else
3734	>	begin
3735	>	with PRecordData(Buff)^ do
3736	>	begin
3737	>	if rdCachedUpdateStatus = cusInserted then
3738	>	rdCachedUpdateStatus := cusUninserted
3739	>	else begin
3740	>	rdUpdateStatus := usDeleted;
3741	>	rdCachedUpdateStatus := cusDeleted;
3742	>	end;
3743	>	end;
3744	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
3745	>	end;
3746	>	Inc(FDeletedRecords);
3747	>	FUpdatesPending := True;
3748	>	end else
3749	>	IBError(ibxeCannotDelete, [nil]);
3750	>	finally
3751	>	FBase.RestoreCursor;
3752	>	end;
3753	>	end;
3754	>
3755	>	procedure TIBCustomDataSet.InternalFirst;
3756	>	begin
3757	>	FCurrentRecord := -1;
3758	>	end;
3759	>
3760	>	procedure TIBCustomDataSet.InternalGotoBookmark(Bookmark: Pointer);
3761	>	begin
3762	>	FCurrentRecord := PInteger(Bookmark)^;
3763	>	end;
3764	>
3765	>	procedure TIBCustomDataSet.InternalHandleException;
3766	>	begin
3767	>	FBase.HandleException(Self)
3768	>	end;
3769	>
3770	>	procedure TIBCustomDataSet.InternalInitFieldDefs;
3771	>	begin
3772	>	if not InternalPrepared then
3773	>	begin
3774	>	InternalPrepare;
3775	>	exit;
3776	>	end;
3777	>	FieldDefsFromQuery(FQSelect);
3778	>	end;
3779	>
3780	>	procedure TIBCustomDataSet.FieldDefsFromQuery(SourceQuery: TIBSQL);
3781	>	const
3782	>	DefaultSQL = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
3783	>	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME ' + {do not localize}
3784	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
3785	>	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
3786	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
3787	>	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
3788	>	'     (not F.RDB$DEFAULT_VALUE is NULL)) '; {do not localize}
3789	>
3790	>	DefaultSQLODS12 = 'Select F.RDB$COMPUTED_BLR, ' + {do not localize}
3791	>	'F.RDB$DEFAULT_VALUE, R.RDB$FIELD_NAME, R.RDB$IDENTITY_TYPE ' + {do not localize}
3792	>	'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
3793	>	'where R.RDB$RELATION_NAME = :RELATION ' +  {do not localize}
3794	>	'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '+ {do not localize}
3795	>	'and ((not F.RDB$COMPUTED_BLR is NULL) or ' + {do not localize}
3796	>	'     (not F.RDB$DEFAULT_VALUE is NULL) or ' + {do not localize}
3797	>	'     ( not R.RDB$IDENTITY_TYPE is NULL))' ; {do not localize}
3798	>
3799	>	var
3800	>	FieldType: TFieldType;
3801	>	FieldSize: Word;
3802	>	FieldDataSize: integer;
3803	>	charSetID: short;
3804	>	CharSetSize: integer;
3805	>	CharSetName: RawByteString;
3806	>	FieldCodePage: TSystemCodePage;
3807	>	FieldNullable : Boolean;
3808	>	i, FieldPosition, FieldPrecision: Integer;
3809	>	FieldAliasName, DBAliasName: string;
3810	>	aRelationName, FieldName: string;
3811	>	Query : TIBSQL;
3812	>	FieldIndex: Integer;
3813	>	FRelationNodes : TRelationNode;
3814	>	aArrayDimensions: integer;
3815	>	aArrayBounds: TArrayBounds;
3816	>	ArrayMetaData: IArrayMetaData;
3817	>
3818	>	function Add_Node(Relation, Field : String) : TRelationNode;
3819	>	var
3820	>	FField : TFieldNode;
3821	>	begin
3822	>	if FRelationNodes.RelationName = '' then
3823	>	Result := FRelationNodes
3824	>	else
3825	>	begin
3826	>	Result := TRelationNode.Create;
3827	>	Result.NextRelation := FRelationNodes;
3828	>	end;
3829	>	Result.RelationName := Relation;
3830	>	FRelationNodes := Result;
3831	>	Query.Params[0].AsString := Relation;
3832	>	Query.ExecQuery;
3833	>	while not Query.Eof do
3834	>	begin
3835	>	FField := TFieldNode.Create;
3836	>	FField.FieldName := Query.Fields[2].AsString;
3837	>	FField.DEFAULT_VALUE := not Query.Fields[1].IsNull;
3838	>	FField.COMPUTED_BLR := not Query.Fields[0].IsNull;
3839	>	FField.IDENTITY_COLUMN := (Query.FieldCount > 3) and not Query.Fields[3].IsNull;
3840	>	FField.NextField := Result.FieldNodes;
3841	>	Result.FieldNodes := FField;
3842	>	Query.Next;
3843	>	end;
3844	>	Query.Close;
3845	>	end;
3846	>
3847	>	function Has_COMPUTED_BLR(Relation, Field : String) : Boolean;
3848	>	var
3849	>	FRelation : TRelationNode;
3850	>	FField : TFieldNode;
3851	>	begin
3852	>	FRelation := FRelationNodes;
3853	>	while Assigned(FRelation) and
3854	>	(FRelation.RelationName <> Relation) do
3855	>	FRelation := FRelation.NextRelation;
3856	>	if not Assigned(FRelation) then
3857	>	FRelation := Add_Node(Relation, Field);
3858	>	Result := false;
3859	>	FField := FRelation.FieldNodes;
3860	>	while Assigned(FField) do
3861	>	if FField.FieldName = Field then
3862	>	begin
3863	>	Result := Ffield.COMPUTED_BLR;
3864	>	Exit;
3865	>	end
3866	>	else
3867	>	FField := Ffield.NextField;
3868	>	end;
3869	>
3870	>	function Has_DEFAULT_VALUE(Relation, Field : String) : Boolean;
3871	>	var
3872	>	FRelation : TRelationNode;
3873	>	FField : TFieldNode;
3874	>	begin
3875	>	FRelation := FRelationNodes;
3876	>	while Assigned(FRelation) and
3877	>	(FRelation.RelationName <> Relation) do
3878	>	FRelation := FRelation.NextRelation;
3879	>	if not Assigned(FRelation) then
3880	>	FRelation := Add_Node(Relation, Field);
3881	>	Result := false;
3882	>	FField := FRelation.FieldNodes;
3883	>	while Assigned(FField) do
3884	>	if FField.FieldName = Field then
3885	>	begin
3886	>	Result := Ffield.DEFAULT_VALUE;
3887	>	Exit;
3888	>	end
3889	>	else
3890	>	FField := Ffield.NextField;
3891	>	end;
3892	>
3893	>	function Is_IDENTITY_COLUMN(Relation, Field : String) : Boolean;
3894	>	var
3895	>	FRelation : TRelationNode;
3896	>	FField : TFieldNode;
3897	>	begin
3898	>	FRelation := FRelationNodes;
3899	>	while Assigned(FRelation) and
3900	>	(FRelation.RelationName <> Relation) do
3901	>	FRelation := FRelation.NextRelation;
3902	>	if not Assigned(FRelation) then
3903	>	FRelation := Add_Node(Relation, Field);
3904	>	Result := false;
3905	>	FField := FRelation.FieldNodes;
3906	>	while Assigned(FField) do
3907	>	if FField.FieldName = Field then
3908	>	begin
3909	>	Result := Ffield.IDENTITY_COLUMN;
3910	>	Exit;
3911	>	end
3912	>	else
3913	>	FField := Ffield.NextField;
3914	>	end;
3915	>
3916	>	Procedure FreeNodes;
3917	>	var
3918	>	FRelation : TRelationNode;
3919	>	FField : TFieldNode;
3920	>	begin
3921	>	while Assigned(FRelationNodes) do
3922	>	begin
3923	>	While Assigned(FRelationNodes.FieldNodes) do
3924	>	begin
3925	>	FField := FRelationNodes.FieldNodes.NextField;
3926	>	FRelationNodes.FieldNodes.Free;
3927	>	FRelationNodes.FieldNodes := FField;
3928	>	end;
3929	>	FRelation := FRelationNodes.NextRelation;
3930	>	FRelationNodes.Free;
3931	>	FRelationNodes := FRelation;
3932	>	end;
3933	>	end;
3934	>
3935	>	begin
3936	>	FRelationNodes := TRelationNode.Create;
3937	>	FNeedsRefresh := False;
3938	>	if not Database.InternalTransaction.InTransaction then
3939	>	Database.InternalTransaction.StartTransaction;
3940	>	Query := TIBSQL.Create(self);
3941	>	try
3942	>	Query.Database := DataBase;
3943	>	Query.Transaction := Database.InternalTransaction;
3944	>	FieldDefs.BeginUpdate;
3945	>	FieldDefs.Clear;
3946	>	FieldIndex := 0;
3947	>	if (Length(FMappedFieldPosition) < SourceQuery.MetaData.Count) then
3948	>	SetLength(FMappedFieldPosition, SourceQuery.MetaData.Count);
3949	>	if FDatabaseInfo.ODSMajorVersion >= 12 then
3950	>	Query.SQL.Text := DefaultSQLODS12
3951	>	else
3952	>	Query.SQL.Text := DefaultSQL;
3953	>	Query.Prepare;
3954	>	SetLength(FAliasNameMap, SourceQuery.MetaData.Count);
3955	>	SetLength(FAliasNameList, SourceQuery.MetaData.Count);
3956	>	for i := 0 to SourceQuery.MetaData.GetCount - 1 do
3957	>	with SourceQuery.MetaData[i] do
3958	>	begin
3959	>	{ Get the field name }
3960	>	FieldAliasName := GetName;
3961	>	DBAliasName := GetAliasname;
3962	>	aRelationName := getRelationName;
3963	>	FieldName := getSQLName;
3964	>	FAliasNameList[i] := DBAliasName;
3965	>	FieldSize := 0;
3966	>	FieldDataSize := GetSize;
3967	>	FieldPrecision := 0;
3968	>	FieldNullable := IsNullable;
3969	>	CharSetSize := 0;
3970	>	CharSetName := '';
3971	>	FieldCodePage := CP_NONE;
3972	>	aArrayDimensions := 0;
3973	>	SetLength(aArrayBounds,0);
3974	>	case SQLType of
3975	>	{ All VARCHAR's must be converted to strings before recording
3976	>	their values }
3977	>	SQL_VARYING, SQL_TEXT:
3978	>	begin
3979	>	if not Database.Attachment.CharSetWidth(getCharSetID,CharSetSize) then
3980	>	CharSetSize := 1;
3981	>	CharSetName := Database.Attachment.GetCharsetName(getCharSetID);
3982	>	Database.Attachment.CharSetID2CodePage(getCharSetID,FieldCodePage);
3983	>	FieldSize := FieldDataSize div CharSetSize;
3984	>	FieldType := ftString;
3985	>	end;
3986	>	{ All Doubles/Floats should be cast to doubles }
3987	>	SQL_DOUBLE, SQL_FLOAT:
3988	>	FieldType := ftFloat;
3989	>	SQL_SHORT:
3990	>	begin
3991	>	if (getScale = 0) then
3992	>	FieldType := ftSmallInt
3993	>	else begin
3994	>	FieldType := ftBCD;
3995	>	FieldPrecision := 4;
3996	>	FieldSize := -getScale;
3997	>	end;
3998	>	end;
3999	>	SQL_LONG:
4000	>	begin
4001	>	if (getScale = 0) then
4002	>	FieldType := ftInteger
4003	>	else if (getScale >= (-4)) then
4004	>	begin
4005	>	FieldType := ftBCD;
4006	>	FieldPrecision := 9;
4007	>	FieldSize := -getScale;
4008	>	end
4009	>	else
4010	>	if Database.SQLDialect = 1 then
4011	>	FieldType := ftFloat
4012	>	else
4013	>	if (FieldCount > i) and (Fields[i] is TFloatField) then
4014	>	FieldType := ftFloat
4015	>	else
4016	>	begin
4017	>	FieldType := ftFMTBCD;
4018	>	FieldPrecision := 9;
4019	>	FieldSize := -getScale;
4020	>	end;
4021	>	end;
4022	>
4023	>	SQL_INT64:
4024	>	begin
4025	>	if (getScale = 0) then
4026	>	FieldType := ftLargeInt
4027	>	else if (getScale >= (-4)) then
4028	>	begin
4029	>	FieldType := ftBCD;
4030	>	FieldPrecision := 18;
4031	>	FieldSize := -getScale;
4032	>	end
4033	>	else
4034	>	FieldType := ftFloat;
4035	>	end;
4036	>	SQL_TIMESTAMP: FieldType := ftDateTime;
4037	>	SQL_TYPE_TIME: FieldType := ftTime;
4038	>	SQL_TYPE_DATE: FieldType := ftDate;
4039	>	SQL_BLOB:
4040	>	begin
4041	>	FieldSize := sizeof (TISC_QUAD);
4042	>	if (getSubtype = 1) then
4043	>	begin
4044	>	if not Database.Attachment.CharSetWidth(getCharSetID,CharSetSize) then
4045	>	CharSetSize := 1;
4046	>	CharSetName := Database.Attachment.GetCharsetName(getCharSetID);
4047	>	Database.Attachment.CharSetID2CodePage(getCharSetID,FieldCodePage);
4048	>	FieldType := ftMemo;
4049	>	end
4050	>	else
4051	>	FieldType := ftBlob;
4052	>	end;
4053	>	SQL_ARRAY:
4054	>	begin
4055	>	FieldSize := sizeof (TISC_QUAD);
4056	>	FieldType := ftArray;
4057	>	ArrayMetaData := GetArrayMetaData;
4058	>	if ArrayMetaData <> nil then
4059	>	begin
4060	>	aArrayDimensions := ArrayMetaData.GetDimensions;
4061	>	aArrayBounds := ArrayMetaData.GetBounds;
4062	>	end;
4063	>	end;
4064	>	SQL_BOOLEAN:
4065	>	FieldType:= ftBoolean;
4066	>	else
4067	>	FieldType := ftUnknown;
4068	>	end;
4069	>	FieldPosition := i + 1;
4070	>	if (FieldType <> ftUnknown) and (FieldAliasName <> 'IBX_INTERNAL_DBKEY') then {do not localize}
4071	>	begin
4072	>	FMappedFieldPosition[FieldIndex] := FieldPosition;
4073	>	Inc(FieldIndex);
4074	>	with TIBFieldDef.Create(FieldDefs,'',FieldType,0,False,FieldDefs.Count+1) do
4075	>	begin
4076	>	Name := FieldAliasName;
4077	>	FAliasNameMap[FieldNo-1] := DBAliasName;
4078	>	Size := FieldSize;
4079	>	DataSize := FieldDataSize;
4080	>	Precision := FieldPrecision;
4081	>	Required := not FieldNullable;
4082	>	RelationName := aRelationName;
4083	>	InternalCalcField := False;
4084	>	CharacterSetSize := CharSetSize;
4085	>	CharacterSetName := CharSetName;
4086	>	CodePage := FieldCodePage;
4087	>	ArrayDimensions := aArrayDimensions;
4088	>	ArrayBounds := aArrayBounds;
4089	>	if (FieldName <> '') and (RelationName <> '') then
4090	>	begin
4091	>	IdentityColumn := Is_IDENTITY_COLUMN(RelationName, FieldName);
4092	>	if Has_COMPUTED_BLR(RelationName, FieldName) then
4093	>	begin
4094	>	Attributes := [faReadOnly];
4095	>	InternalCalcField := True;
4096	>	FNeedsRefresh := True;
4097	>	end
4098	>	else
4099	>	begin
4100	>	if Has_DEFAULT_VALUE(RelationName, FieldName) then
4101	>	begin
4102	>	if not FieldNullable then
4103	>	Attributes := [faRequired];
4104	>	end
4105	>	else
4106	>	FNeedsRefresh := True;
4107	>	end;
4108	>	end;
4109	>	end;
4110	>	end;
4111	>	end;
4112	>	finally
4113	>	Query.free;
4114	>	FreeNodes;
4115	>	Database.InternalTransaction.Commit;
4116	>	FieldDefs.EndUpdate;
4117	>	FieldDefs.Updated := true;
4118	>	end;
4119	>	end;
4120	>
4121	>	procedure TIBCustomDataSet.InternalInitRecord(Buffer: PChar);
4122	>	begin
4123	>	CopyRecordBuffer(FModelBuffer, Buffer);
4124	>	end;
4125	>
4126	>	procedure TIBCustomDataSet.InternalLast;
4127	>	var
4128	>	Buffer: PChar;
4129	>	begin
4130	>	if (FQSelect.EOF) then
4131	>	FCurrentRecord := FRecordCount
4132	>	else begin
4133	>	Buffer := AllocRecordBuffer;
4134	>	try
4135	>	while FQSelect.Next do
4136	>	begin
4137	>	FetchCurrentRecordToBuffer(FQSelect, FRecordCount, Buffer);
4138	>	Inc(FRecordCount);
4139	>	end;
4140	>	FCurrentRecord := FRecordCount;
4141	>	finally
4142	>	FreeRecordBuffer(Buffer);
4143	>	end;
4144	>	end;
4145	>	end;
4146	>
4147	>	procedure TIBCustomDataSet.InternalSetParamsFromCursor;
4148	>	var
4149	>	i: Integer;
4150	>	cur_param: ISQLParam;
4151	>	cur_field: TField;
4152	>	s: TStream;
4153	>	begin
4154	>	if FQSelect.SQL.Text = '' then
4155	>	IBError(ibxeEmptyQuery, [nil]);
4156	>	if not FInternalPrepared then
4157	>	InternalPrepare;
4158	>	if (SQLParams.GetCount > 0) and (DataSource <> nil) and (DataSource.DataSet <> nil) then
4159	>	begin
4160	>	for i := 0 to SQLParams.GetCount - 1 do
4161	>	begin
4162	>	cur_field := DataSource.DataSet.FindField(SQLParams[i].Name);
4163	>	cur_param := SQLParams[i];
4164	>	if (cur_field <> nil) then begin
4165	>	if (cur_field.IsNull) then
4166	>	cur_param.IsNull := True
4167	>	else case cur_field.DataType of
4168	>	ftString:
4169	>	cur_param.AsString := cur_field.AsString;
4170	>	ftBoolean:
4171	>	cur_param.AsBoolean := cur_field.AsBoolean;
4172	>	ftSmallint, ftWord:
4173	>	cur_param.AsShort := cur_field.AsInteger;
4174	>	ftInteger:
4175	>	cur_param.AsLong := cur_field.AsInteger;
4176	>	ftLargeInt:
4177	>	cur_param.AsInt64 := TLargeIntField(cur_field).AsLargeInt;
4178	>	ftFloat, ftCurrency:
4179	>	cur_param.AsDouble := cur_field.AsFloat;
4180	>	ftBCD:
4181	>	cur_param.AsCurrency := cur_field.AsCurrency;
4182	>	ftDate:
4183	>	cur_param.AsDate := cur_field.AsDateTime;
4184	>	ftTime:
4185	>	cur_param.AsTime := cur_field.AsDateTime;
4186	>	ftDateTime:
4187	>	cur_param.AsDateTime := cur_field.AsDateTime;
4188	>	ftBlob, ftMemo:
4189	>	begin
4190	>	s := nil;
4191	>	try
4192	>	s := DataSource.DataSet.
4193	>	CreateBlobStream(cur_field, bmRead);
4194	>	cur_param.AsBlob := TIBDSBlobStream(s).FBlobStream.Blob;
4195	>	finally
4196	>	s.free;
4197	>	end;
4198	>	end;
4199	>	ftArray:
4200	>	cur_param.AsArray := TIBArrayField(cur_field).ArrayIntf;
4201	>	else
4202	>	IBError(ibxeNotSupported, [nil]);
4203	>	end;
4204	>	end;
4205	>	end;
4206	>	end;
4207	>	end;
4208	>
4209	>	procedure TIBCustomDataSet.ReQuery;
4210	>	begin
4211	>	FQSelect.Close;
4212	>	ClearBlobCache;
4213	>	FCurrentRecord := -1;
4214	>	FRecordCount := 0;
4215	>	FDeletedRecords := 0;
4216	>	FBPos := 0;
4217	>	FOBPos := 0;
4218	>	FBEnd := 0;
4219	>	FOBEnd := 0;
4220	>	FQSelect.Close;
4221	>	FQSelect.ExecQuery;
4222	>	FOpen := FQSelect.Open;
4223	>	First;
4224	>	end;
4225	>
4226	>	procedure TIBCustomDataSet.InternalOpen;
4227	>
4228	>	function RecordDataLength(n: Integer): Long;
4229	>	begin
4230	>	result := SizeOf(TRecordData) + ((n - 1) * SizeOf(TFieldData));
4231	>	end;
4232	>
4233	>	begin
4234	>	FBase.SetCursor;
4235	>	try
4236	>	ActivateConnection;
4237	>	ActivateTransaction;
4238	>	if FQSelect.SQL.Text = '' then
4239	>	IBError(ibxeEmptyQuery, [nil]);
4240	>	if not FInternalPrepared then
4241	>	InternalPrepare;
4242	>	if FQSelect.SQLStatementType = SQLSelect then
4243	>	begin
4244	>	if DefaultFields then
4245	>	CreateFields;
4246	>	FArrayFieldCount := 0;
4247	>	BindFields(True);
4248	>	FCurrentRecord := -1;
4249	>	FQSelect.ExecQuery;
4250	>	FOpen := FQSelect.Open;
4251	>
4252	>	{ Initialize offsets, buffer sizes, etc...
4253	>	1. Initially FRecordSize is just the "RecordDataLength".
4254	>	2. Allocate a "model" buffer and do a dummy fetch
4255	>	3. After the dummy fetch, FRecordSize will be appropriately
4256	>	adjusted to reflect the additional "weight" of the field
4257	>	data.
4258	>	4. Set up the FCalcFieldsOffset, FBlobCacheOffset, FArrayCacheOffset and FRecordBufferSize.
4259	>	5. Now, with the BufferSize available, allocate memory for chunks of records
4260	>	6. Re-allocate the model buffer, accounting for the new
4261	>	FRecordBufferSize.
4262	>	7. Finally, calls to AllocRecordBuffer will work!.
4263	>	}
4264	>	{Step 1}
4265	>	FRecordSize := RecordDataLength(FQSelect.FieldCount);
4266	>	{Step 2, 3}
4267	>	GetMem(FFieldColumns,sizeof(TFieldColumns) * (FQSelect.FieldCount));
4268	>	IBAlloc(FModelBuffer, 0, FRecordSize);
4269	>	InitModelBuffer(FQSelect, FModelBuffer);
4270	>	{Step 4}
4271	>	FCalcFieldsOffset := FRecordSize;
4272	>	FBlobCacheOffset := FCalcFieldsOffset + CalcFieldsSize;
4273	>	FArrayCacheOffset := (FBlobCacheOffset + (BlobFieldCount * SizeOf(TIBBlobStream)));
4274	>	FRecordBufferSize := FArrayCacheOffset + (ArrayFieldCount * sizeof(IArray));
4275	>	{Step 5}
4276	>	if UniDirectional then
4277	>	FBufferChunkSize := FRecordBufferSize * UniCache
4278	>	else
4279	>	FBufferChunkSize := FRecordBufferSize * BufferChunks;
4280	>	IBAlloc(FBufferCache, FBufferChunkSize, FBufferChunkSize);
4281	>	if FCachedUpdates or (csReading in ComponentState) then
4282	>	IBAlloc(FOldBufferCache, FBufferChunkSize, FBufferChunkSize);
4283	>	FBPos := 0;
4284	>	FOBPos := 0;
4285	>	FBEnd := 0;
4286	>	FOBEnd := 0;
4287	>	FCacheSize := FBufferChunkSize;
4288	>	FOldCacheSize := FBufferChunkSize;
4289	>	{Step 6}
4290	>	IBAlloc(FModelBuffer, RecordDataLength(FQSelect.FieldCount),
4291	>	FRecordBufferSize);
4292	>	{Step 7}
4293	>	FOldBuffer := AllocRecordBuffer;
4294	>	end
4295	>	else
4296	>	FQSelect.ExecQuery;
4297	>	finally
4298	>	FBase.RestoreCursor;
4299	>	end;
4300	>	end;
4301	>
4302	>	procedure TIBCustomDataSet.InternalPost;
4303	>	var
4304	>	Qry: TIBSQL;
4305	>	Buff: PChar;
4306	>	bInserting: Boolean;
4307	>	begin
4308	>	FBase.SetCursor;
4309	>	try
4310	>	Buff := GetActiveBuf;
4311	>	CheckEditState;
4312	>	AdjustRecordOnInsert(Buff);
4313	>	if (State = dsInsert) then
4314	>	begin
4315	>	bInserting := True;
4316	>	Qry := FQInsert;
4317	>	PRecordData(Buff)^.rdUpdateStatus := usInserted;
4318	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
4319	>	WriteRecordCache(FRecordCount, Buff);
4320	>	FCurrentRecord := FRecordCount;
4321	>	end
4322	>	else begin
4323	>	bInserting := False;
4324	>	Qry := FQModify;
4325	>	if PRecordData(Buff)^.rdCachedUpdateStatus = cusUnmodified then
4326	>	begin
4327	>	PRecordData(Buff)^.rdUpdateStatus := usModified;
4328	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusModified;
4329	>	end
4330	>	else if PRecordData(Buff)^.
4331	>	rdCachedUpdateStatus = cusUninserted then
4332	>	begin
4333	>	PRecordData(Buff)^.rdCachedUpdateStatus := cusInserted;
4334	>	Dec(FDeletedRecords);
4335	>	end;
4336	>	end;
4337	>	if (not CachedUpdates) then
4338	>	InternalPostRecord(Qry, Buff)
4339	>	else begin
4340	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
4341	>	FUpdatesPending := True;
4342	>	end;
4343	>	if bInserting then
4344	>	Inc(FRecordCount);
4345	>	finally
4346	>	FBase.RestoreCursor;
4347	>	end;
4348	>	end;
4349	>
4350	>	procedure TIBCustomDataSet.InternalRefresh;
4351	>	begin
4352	>	inherited InternalRefresh;
4353	>	InternalRefreshRow;
4354	>	end;
4355	>
4356	>	procedure TIBCustomDataSet.InternalSetToRecord(Buffer: PChar);
4357	>	begin
4358	>	InternalGotoBookmark(@(PRecordData(Buffer)^.rdRecordNumber));
4359	>	end;
4360	>
4361	>	function TIBCustomDataSet.IsCursorOpen: Boolean;
4362	>	begin
4363	>	result := FOpen;
4364	>	end;
4365	>
4366	>	procedure TIBCustomDataSet.Loaded;
4367	>	begin
4368	>	if assigned(FQSelect) then
4369	>	FBaseSQLSelect.assign(FQSelect.SQL);
4370	>	inherited Loaded;
4371	>	end;
4372	>
4373	>	procedure TIBCustomDataSet.Post;
4374	>	var CancelPost: boolean;
4375	>	begin
4376	>	CancelPost := false;
4377	>	if assigned(FOnValidatePost) then
4378	>	OnValidatePost(self,CancelPost);
4379	>	if CancelPost then
4380	>	Cancel
4381	>	else
4382	>	inherited Post;
4383	>	end;
4384	>
4385	>	function TIBCustomDataSet.Locate(const KeyFields: string; const KeyValues: Variant;
4386	>	Options: TLocateOptions): Boolean;
4387	>	var
4388	>	CurBookmark: TBookmark;
4389	>	begin
4390	>	DisableControls;
4391	>	try
4392	>	CurBookmark := Bookmark;
4393	>	First;
4394	>	result := InternalLocate(KeyFields, KeyValues, Options);
4395	>	if not result then
4396	>	Bookmark := CurBookmark;
4397	>	finally
4398	>	EnableControls;
4399	>	end;
4400	>	end;
4401	>
4402	>	function TIBCustomDataSet.Lookup(const KeyFields: string; const KeyValues: Variant;
4403	>	const ResultFields: string): Variant;
4404	>	var
4405	>	fl: TList;
4406	>	CurBookmark: TBookmark;
4407	>	begin
4408	>	DisableControls;
4409	>	fl := TList.Create;
4410	>	CurBookmark := Bookmark;
4411	>	try
4412	>	First;
4413	>	if InternalLocate(KeyFields, KeyValues, []) then
4414	>	begin
4415	>	if (ResultFields <> '') then
4416	>	result := FieldValues[ResultFields]
4417	>	else
4418	>	result := NULL;
4419	>	end
4420	>	else
4421	>	result := Null;
4422	>	finally
4423	>	Bookmark := CurBookmark;
4424	>	fl.Free;
4425	>	EnableControls;
4426	>	end;
4427	>	end;
4428	>
4429	>	procedure TIBCustomDataSet.SetBookmarkData(Buffer: PChar; Data: Pointer);
4430	>	begin
4431	>	PRecordData(Buffer)^.rdRecordNumber := PInteger(Data)^;
4432	>	end;
4433	>
4434	>	procedure TIBCustomDataSet.SetBookmarkFlag(Buffer: PChar; Value: TBookmarkFlag);
4435	>	begin
4436	>	PRecordData(Buffer)^.rdBookmarkFlag := Value;
4437	>	end;
4438	>
4439	>	procedure TIBCustomDataSet.SetCachedUpdates(Value: Boolean);
4440	>	begin
4441	>	if not Value and FCachedUpdates then
4442	>	CancelUpdates;
4443	>	if (not (csReading in ComponentState)) and Value then
4444	>	CheckDatasetClosed;
4445	>	FCachedUpdates := Value;
4446	>	end;
4447	>
4448	>	procedure TIBCustomDataSet.SetDataSource(Value: TDataSource);
4449	>	begin
4450	>	if IsLinkedTo(Value) then
4451	>	IBError(ibxeCircularReference, [nil]);
4452	>	if FDataLink <> nil then
4453	>	FDataLink.DataSource := Value;
4454	>	end;
4455	>
4456	>	procedure TIBCustomDataSet.InternalSetFieldData(Field: TField; Buffer: Pointer);
4457	>	var
4458	>	Buff, TmpBuff: PChar;
4459	>	MappedFieldPos: integer;
4460	>	begin
4461	>	Buff := GetActiveBuf;
4462	>	if Field.FieldNo < 0 then
4463	>	begin
4464	>	TmpBuff := Buff + FRecordSize + Field.Offset;
4465	>	Boolean(TmpBuff[0]) := LongBool(Buffer);
4466	>	if Boolean(TmpBuff[0]) then
4467	>	Move(Buffer^, TmpBuff[1], Field.DataSize);
4468	>	WriteRecordCache(PRecordData(Buff)^.rdRecordNumber, Buff);
4469	>	end
4470	>	else begin
4471	>	CheckEditState;
4472	>	with PRecordData(Buff)^ do
4473	>	begin
4474	>	{ If inserting, Adjust record position }
4475	>	AdjustRecordOnInsert(Buff);
4476	>	MappedFieldPos := FMappedFieldPosition[Field.FieldNo - 1];
4477	>	if (MappedFieldPos > 0) and
4478	>	(MappedFieldPos <= rdFieldCount) then
4479	>	with rdFields[MappedFieldPos], FFieldColumns^[MappedFieldPos] do
4480	>	begin
4481	>	Field.Validate(Buffer);
4482	>	if (Buffer = nil) or
4483	>	(Field is TIBStringField) and (PChar(Buffer)[0] = #0) then
4484	>	fdIsNull := True
4485	>	else
4486	>	begin
4487	>	Move(Buffer^, Buff[fdDataOfs],fdDataSize);
4488	>	if (fdDataType = SQL_TEXT) or (fdDataType = SQL_VARYING) then
4489	>	fdDataLength := StrLen(PChar(Buffer));
4490	>	fdIsNull := False;
4491	>	if rdUpdateStatus = usUnmodified then
4492	>	begin
4493	>	if CachedUpdates then
4494	>	begin
4495	>	FUpdatesPending := True;
4496	>	if State = dsInsert then
4497	>	rdCachedUpdateStatus := cusInserted
4498	>	else if State = dsEdit then
4499	>	rdCachedUpdateStatus := cusModified;
4500	>	end;
4501	>
4502	>	if State = dsInsert then
4503	>	rdUpdateStatus := usInserted
4504	>	else
4505	>	rdUpdateStatus := usModified;
4506	>	end;
4507	>	WriteRecordCache(rdRecordNumber, Buff);
4508	>	SetModified(True);
4509	>	end;
4510	>	end;
4511	>	end;
4512	>	end;
4513	>	if not (State in [dsCalcFields, dsFilter, dsNewValue]) then
4514	>	DataEvent(deFieldChange, PtrInt(Field));
4515	>	end;
4516	>
4517	>	procedure TIBCustomDataSet.SetRecNo(Value: Integer);
4518	>	begin
4519	>	CheckBrowseMode;
4520	>	if (Value < 1) then
4521	>	Value := 1
4522	>	else if Value > FRecordCount then
4523	>	begin
4524	>	InternalLast;
4525	>	Value := Min(FRecordCount, Value);
4526	>	end;
4527	>	if (Value <> RecNo) then
4528	>	begin
4529	>	DoBeforeScroll;
4530	>	FCurrentRecord := Value - 1;
4531	>	Resync([]);
4532	>	DoAfterScroll;
4533	>	end;
4534	>	end;
4535	>
4536	>	procedure TIBCustomDataSet.Disconnect;
4537	>	begin
4538	>	Close;
4539	>	InternalUnPrepare;
4540	>	end;
4541	>
4542	>	procedure TIBCustomDataSet.SetUpdateMode(const Value: TUpdateMode);
4543	>	begin
4544	>	if not CanModify then
4545	>	IBError(ibxeCannotUpdate, [nil])
4546	>	else
4547	>	FUpdateMode := Value;
4548	>	end;
4549	>
4550	>
4551	>	procedure TIBCustomDataSet.SetUpdateObject(Value: TIBDataSetUpdateObject);
4552	>	begin
4553	>	if Value <> FUpdateObject then
4554	>	begin
4555	>	if Assigned(FUpdateObject) and (FUpdateObject.DataSet = Self) then
4556	>	FUpdateObject.DataSet := nil;
4557	>	FUpdateObject := Value;
4558	>	if Assigned(FUpdateObject) then
4559	>	begin
4560	>	if Assigned(FUpdateObject.DataSet) and
4561	>	(FUpdateObject.DataSet <> Self) then
4562	>	FUpdateObject.DataSet.UpdateObject := nil;
4563	>	FUpdateObject.DataSet := Self;
4564	>	end;
4565	>	end;
4566	>	end;
4567	>
4568	>	function TIBCustomDataSet.ConstraintsStored: Boolean;
4569	>	begin
4570	>	Result := Constraints.Count > 0;
4571	>	end;
4572	>
4573	>	procedure TIBCustomDataSet.ClearCalcFields(Buffer: PChar);
4574	>	begin
4575	>	FillChar(Buffer[FRecordSize], CalcFieldsSize, 0);
4576	>	end;
4577	>
4578	>	procedure TIBCustomDataSet.ClearIBLinks;
4579	>	var i: integer;
4580	>	begin
4581	>	for i := FIBLinks.Count - 1 downto 0 do
4582	>	TIBControlLink(FIBLinks[i]).IBDataSet := nil;
4583	>	end;
4584	>
4585	>
4586	>	procedure TIBCustomDataSet.InternalUnPrepare;
4587	>	begin
4588	>	if FInternalPrepared then
4589	>	begin
4590	>	CheckDatasetClosed;
4591	>	if FDidActivate then
4592	>	DeactivateTransaction;
4593	>	FieldDefs.Clear;
4594	>	FieldDefs.Updated := false;
4595	>	FInternalPrepared := False;
4596	>	Setlength(FAliasNameList,0);
4597	>	end;
4598	>	end;
4599	>
4600	>	procedure TIBCustomDataSet.InternalExecQuery;
4601	>	var
4602	>	DidActivate: Boolean;
4603	>	begin
4604	>	DidActivate := False;
4605	>	FBase.SetCursor;
4606	>	try
4607	>	ActivateConnection;
4608	>	DidActivate := ActivateTransaction;
4609	>	if FQSelect.SQL.Text = '' then
4610	>	IBError(ibxeEmptyQuery, [nil]);
4611	>	if not FInternalPrepared then
4612	>	InternalPrepare;
4613	>	if FQSelect.SQLStatementType = SQLSelect then
4614	>	begin
4615	>	IBError(ibxeIsASelectStatement, [nil]);
4616	>	end
4617	>	else
4618	>	FQSelect.ExecQuery;
4619	>	finally
4620	>	if DidActivate then
4621	>	DeactivateTransaction;
4622	>	FBase.RestoreCursor;
4623	>	end;
4624	>	end;
4625	>
4626	>	function TIBCustomDataSet.GetSelectStmtIntf: IStatement;
4627	>	begin
4628	>	Result := FQSelect.Statement;
4629	>	end;
4630	>
4631	>	function TIBCustomDataSet.GetParser: TSelectSQLParser;
4632	>	begin
4633	>	if not assigned(FParser) then
4634	>	FParser := CreateParser;
4635	>	Result := FParser
4636	>	end;
4637	>
4638	>	procedure TIBCustomDataSet.ResetParser;
4639	>	begin
4640	>	if assigned(FParser) then
4641	>	begin
4642	>	FParser.Free;
4643	>	FParser := nil;
4644	>	FQSelect.OnSQLChanged := nil; {Do not react to change}
4645	>	try
4646	>	FQSelect.SQL.Assign(FBaseSQLSelect);
4647	>	finally
4648	>	FQSelect.OnSQLChanged := SQLChanged;
4649	>	end;
4650	>	end;
4651	>	end;
4652	>
4653	>	function TIBCustomDataSet.HasParser: boolean;
4654	>	begin
4655	>	Result := not (csDesigning in ComponentState) and (FParser <> nil)
4656	>	end;
4657	>
4658	>	procedure TIBCustomDataSet.SetGenerateParamNames(AValue: Boolean);
4659	>	begin
4660	>	if FGenerateParamNames = AValue then Exit;
4661	>	FGenerateParamNames := AValue;
4662	>	Disconnect
4663	>	end;
4664	>
4665	>	procedure TIBCustomDataSet.InitRecord(Buffer: PChar);
4666	>	begin
4667	>	inherited InitRecord(Buffer);
4668	>	with PRecordData(Buffer)^ do
4669	>	begin
4670	>	rdUpdateStatus := TUpdateStatus(usInserted);
4671	>	rdBookMarkFlag := bfInserted;
4672	>	rdRecordNumber := -1;
4673	>	end;
4674	>	end;
4675	>
4676	>	procedure TIBCustomDataSet.InternalInsert;
4677	>	begin
4678	>	CursorPosChanged;
4679	>	end;
4680	>
4681	>	{ TIBDataSet IProviderSupport }
4682	>
4683	>	procedure TIBCustomDataSet.PSEndTransaction(Commit: Boolean);
4684	>	begin
4685	>	if Commit then
4686	>	Transaction.Commit else
4687	>	Transaction.Rollback;
4688	>	end;
4689	>
4690	>	function TIBCustomDataSet.PSExecuteStatement(const ASQL: string; AParams: TParams;
4691	>	ResultSet: Pointer = nil): Integer;
4692	>	var
4693	>	FQuery: TIBQuery;
4694	>	begin
4695	>	if Assigned(ResultSet) then
4696	>	begin
4697	>	TDataSet(ResultSet^) := TIBQuery.Create(nil);
4698	>	with TIBQuery(ResultSet^) do
4699	>	begin
4700	>	SQL.Text := ASQL;
4701	>	Params.Assign(AParams);
4702	>	Open;
4703	>	Result := RowsAffected;
4704	>	end;
4705	>	end
4706	>	else
4707	>	begin
4708	>	FQuery := TIBQuery.Create(nil);
4709	>	try
4710	>	FQuery.Database := Database;
4711	>	FQuery.Transaction := Transaction;
4712	>	FQuery.GenerateParamNames := True;
4713	>	FQuery.SQL.Text := ASQL;
4714	>	FQuery.Params.Assign(AParams);
4715	>	FQuery.ExecSQL;
4716	>	Result := FQuery.RowsAffected;
4717	>	finally
4718	>	FQuery.Free;
4719	>	end;
4720	>	end;
4721	>	end;
4722	>
4723	>	function TIBCustomDataSet.PSGetQuoteChar: string;
4724	>	begin
4725	>	if Database.SQLDialect = 3 then
4726	>	Result := '"' else
4727	>	Result := '';
4728	>	end;
4729	>
4730	>	function TIBCustomDataSet.PSGetUpdateException(E: Exception; Prev: EUpdateError): EUpdateError;
4731	>	var
4732	>	PrevErr: Integer;
4733	>	begin
4734	>	if Prev <> nil then
4735	>	PrevErr := Prev.ErrorCode else
4736	>	PrevErr := 0;
4737	>	if E is EIBError then
4738	>	with EIBError(E) do
4739	>	Result := EUpdateError.Create(E.Message, '', SQLCode, PrevErr, E) else
4740	>	Result := inherited PSGetUpdateException(E, Prev);
4741	>	end;
4742	>
4743	>	function TIBCustomDataSet.PSInTransaction: Boolean;
4744	>	begin
4745	>	Result := Transaction.InTransaction;
4746	>	end;
4747	>
4748	>	function TIBCustomDataSet.PSIsSQLBased: Boolean;
4749	>	begin
4750	>	Result := True;
4751	>	end;
4752	>
4753	>	function TIBCustomDataSet.PSIsSQLSupported: Boolean;
4754	>	begin
4755	>	Result := True;
4756	>	end;
4757	>
4758	>	procedure TIBCustomDataSet.PSReset;
4759	>	begin
4760	>	inherited PSReset;
4761	>	if Active then
4762	>	begin
4763	>	Close;
4764	>	Open;
4765	>	end;
4766	>	end;
4767	>
4768	>	function TIBCustomDataSet.PSUpdateRecord(UpdateKind: TUpdateKind; Delta: TDataSet): Boolean;
4769	>	var
4770	>	UpdateAction: TIBUpdateAction;
4771	>	SQL: string;
4772	>	Params: TParams;
4773	>
4774	>	procedure AssignParams(DataSet: TDataSet; Params: TParams);
4775	>	var
4776	>	I: Integer;
4777	>	Old: Boolean;
4778	>	Param: TParam;
4779	>	PName: string;
4780	>	Field: TField;
4781	>	Value: Variant;
4782	>	begin
4783	>	for I := 0 to Params.Count - 1 do
4784	>	begin
4785	>	Param := Params[I];
4786	>	PName := Param.Name;
4787	>	Old := CompareText(Copy(PName, 1, 4), 'OLD_') = 0; {do not localize}
4788	>	if Old then System.Delete(PName, 1, 4);
4789	>	Field := DataSet.FindField(PName);
4790	>	if not Assigned(Field) then Continue;
4791	>	if Old then Param.AssignFieldValue(Field, Field.OldValue) else
4792	>	begin
4793	>	Value := Field.NewValue;
4794	>	if VarIsEmpty(Value) then Value := Field.OldValue;
4795	>	Param.AssignFieldValue(Field, Value);
4796	>	end;
4797	>	end;
4798	>	end;
4799	>
4800	>	begin
4801	>	Result := False;
4802	>	if Assigned(OnUpdateRecord) then
4803	>	begin
4804	>	UpdateAction := uaFail;
4805	>	if Assigned(FOnUpdateRecord) then
4806	>	begin
4807	>	FOnUpdateRecord(Delta, UpdateKind, UpdateAction);
4808	>	Result := UpdateAction = uaApplied;
4809	>	end;
4810	>	end
4811	>	else if Assigned(FUpdateObject) then
4812	>	begin
4813	>	SQL := FUpdateObject.GetSQL(UpdateKind).Text;
4814	>	if SQL <> '' then
4815	>	begin
4816	>	Params := TParams.Create;
4817	>	try
4818	>	Params.ParseSQL(SQL, True);
4819	>	AssignParams(Delta, Params);
4820	>	if PSExecuteStatement(SQL, Params) = 0 then
4821	>	IBError(ibxeNoRecordsAffected, [nil]);
4822	>	Result := True;
4823	>	finally
4824	>	Params.Free;
4825	>	end;
4826	>	end;
4827	>	end;
4828	>	end;
4829	>
4830	>	procedure TIBCustomDataSet.PSStartTransaction;
4831	>	begin
4832	>	ActivateConnection;
4833	>	Transaction.StartTransaction;
4834	>	end;
4835	>
4836	>	function TIBCustomDataSet.PsGetTableName: string;
4837	>	begin
4838	>	//  if not FInternalPrepared then
4839	>	//    InternalPrepare;
4840	>	{ It is possible for the FQSelectSQL to be unprepared
4841	>	with FInternalPreprepared being true (see DoBeforeTransactionEnd).
4842	>	So check the Prepared of the SelectSQL instead }
4843	>	if not FQSelect.Prepared then
4844	>	FQSelect.Prepare;
4845	>	Result := FQSelect.UniqueRelationName;
4846	>	end;
4847	>
4848	>	procedure TIBDataSet.BatchInput(InputObject: TIBBatchInput);
4849	>	begin
4850	>	InternalBatchInput(InputObject);
4851	>	end;
4852	>
4853	>	procedure TIBDataSet.BatchOutput(OutputObject: TIBBatchOutput);
4854	>	begin
4855	>	InternalBatchOutput(OutputObject);
4856	>	end;
4857	>
4858	>	procedure TIBDataSet.ExecSQL;
4859	>	begin
4860	>	InternalExecQuery;
4861	>	end;
4862	>
4863	>	procedure TIBDataSet.Prepare;
4864	>	begin
4865	>	InternalPrepare;
4866	>	end;
4867	>
4868	>	procedure TIBDataSet.UnPrepare;
4869	>	begin
4870	>	InternalUnPrepare;
4871	>	end;
4872	>
4873	>	function TIBDataSet.GetPrepared: Boolean;
4874	>	begin
4875	>	Result := InternalPrepared;
4876	>	end;
4877	>
4878	>	procedure TIBDataSet.InternalOpen;
4879	>	begin
4880	>	ActivateConnection;
4881	>	ActivateTransaction;
4882	>	InternalSetParamsFromCursor;
4883	>	Inherited InternalOpen;
4884	>	end;
4885	>
4886	>	procedure TIBDataSet.SetFiltered(Value: Boolean);
4887	>	begin
4888	>	if(Filtered <> Value) then
4889	>	begin
4890	>	inherited SetFiltered(value);
4891	>	if Active then
4892	>	begin
4893	>	Close;
4894	>	Open;
4895	>	end;
4896	>	end
4897	>	else
4898	>	inherited SetFiltered(value);
4899	>	end;
4900	>
4901	>	function TIBCustomDataSet.BookmarkValid(Bookmark: TBookmark): Boolean;
4902	>	begin
4903	>	Result := false;
4904	>	if not Assigned(Bookmark) then
4905	>	exit;
4906	>	Result := PInteger(Bookmark)^ < FRecordCount;
4907	>	end;
4908	>
4909	>	function TIBCustomDataSet.GetFieldData(Field: TField;
4910	>	Buffer: Pointer): Boolean;
4911	>	{$IFDEF TBCDFIELD_IS_BCD}
4912	>	var
4913	>	lTempCurr : System.Currency;
4914	>	begin
4915	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4916	>	begin
4917	>	Result := InternalGetFieldData(Field, @lTempCurr);
4918	>	if Result then
4919	>	CurrToBCD(lTempCurr, TBCD(Buffer^), 32, Field.Size);
4920	>	end
4921	>	else
4922	>	{$ELSE}
4923	>	begin
4924	>	{$ENDIF}
4925	>	Result := InternalGetFieldData(Field, Buffer);
4926	>	end;
4927	>
4928	>	function TIBCustomDataSet.GetFieldData(Field: TField; Buffer: Pointer;
4929	>	NativeFormat: Boolean): Boolean;
4930	>	begin
4931	>	if (Field.DataType = ftBCD) and not NativeFormat then
4932	>	Result := InternalGetFieldData(Field, Buffer)
4933	>	else
4934	>	Result := inherited GetFieldData(Field, Buffer, NativeFormat);
4935	>	end;
4936	>
4937	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer);
4938	>	{$IFDEF TDBDFIELD_IS_BCD}
4939	>	var
4940	>	lTempCurr : System.Currency;
4941	>	begin
4942	>	if (Field.DataType = ftBCD) and (Buffer <> nil) then
4943	>	begin
4944	>	BCDToCurr(TBCD(Buffer^), lTempCurr);
4945	>	InternalSetFieldData(Field, @lTempCurr);
4946	>	end
4947	>	else
4948	>	{$ELSE}
4949	>	begin
4950	>	{$ENDIF}
4951	>	InternalSetFieldData(Field, Buffer);
4952	>	end;
4953	>
4954	>	procedure TIBCustomDataSet.SetFieldData(Field: TField; Buffer: Pointer;
4955	>	NativeFormat: Boolean);
4956	>	begin
4957	>	if (not NativeFormat) and (Field.DataType = ftBCD) then
4958	>	InternalSetfieldData(Field, Buffer)
4959	>	else
4960	>	inherited SetFieldData(Field, buffer, NativeFormat);
4961	>	end;
4962	>
4963	>	{ TIBDataSetUpdateObject }
4964	>
4965	>	constructor TIBDataSetUpdateObject.Create(AOwner: TComponent);
4966	>	begin
4967	>	inherited Create(AOwner);
4968	>	FRefreshSQL := TStringList.Create;
4969	>	end;
4970	>
4971	>	destructor TIBDataSetUpdateObject.Destroy;
4972	>	begin
4973	>	FRefreshSQL.Free;
4974	>	inherited Destroy;
4975	>	end;
4976	>
4977	>	procedure TIBDataSetUpdateObject.SetRefreshSQL(value: TStrings);
4978	>	begin
4979	>	FRefreshSQL.Assign(Value);
4980	>	end;
4981	>
4982	>	procedure TIBDataSetUpdateObject.InternalSetParams(Params: ISQLParams;
4983	>	buff: PChar);
4984	>	begin
4985	>	if not Assigned(DataSet) then Exit;
4986	>	DataSet.SetInternalSQLParams(Params, buff);
4987	>	end;
4988	>
4989	>	procedure TIBDataSetUpdateObject.InternalSetParams(Query: TIBSQL; buff: PChar);
4990	>	begin
4991	>	InternalSetParams(Query.Params,buff);
4992	>	end;
4993	>
4994	>	procedure TIBDataSetUpdateObject.UpdateRecordFromQuery(QryResults: IResults;
4995	>	Buffer: PChar);
4996	>	begin
4997	>	if not Assigned(DataSet) then Exit;
4998	>	DataSet.UpdateRecordFromQuery(QryResults, Buffer);
4999	>	end;
5000	>
5001	>	function TIBDSBlobStream.GetSize: Int64;
5002	>	begin
5003	>	Result := FBlobStream.BlobSize;
5004	>	end;
5005	>
5006	>	{ TIBDSBlobStream }
5007	>	constructor TIBDSBlobStream.Create(AField: TField; ABlobStream: TIBBlobStream;
5008	>	Mode: TBlobStreamMode);
5009	>	begin
5010	>	FField := AField;
5011	>	FBlobStream := ABlobStream;
5012	>	FBlobStream.Seek(0, soFromBeginning);
5013	>	if (Mode = bmWrite) then
5014	>	begin
5015	>	FBlobStream.Truncate;
5016	>	TIBCustomDataSet(FField.DataSet).RecordModified(True);
5017	>	TBlobField(FField).Modified := true;
5018	>	FHasWritten := true;
5019	>	end;
5020	>	end;
5021	>
5022	>	destructor TIBDSBlobStream.Destroy;
5023	>	begin
5024	>	if FHasWritten then
5025	>	TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
5026	>	inherited Destroy;
5027	>	end;
5028	>
5029	>	function TIBDSBlobStream.Read(var Buffer; Count: Longint): Longint;
5030	>	begin
5031	>	result := FBlobStream.Read(Buffer, Count);
5032	>	end;
5033	>
5034	>	function TIBDSBlobStream.Seek(Offset: Longint; Origin: Word): Longint;
5035	>	begin
5036	>	result := FBlobStream.Seek(Offset, Origin);
5037	>	end;
5038	>
5039	>	procedure TIBDSBlobStream.SetSize(NewSize: Longint);
5040	>	begin
5041	>	FBlobStream.SetSize(NewSize);
5042	>	end;
5043	>
5044	>	function TIBDSBlobStream.Write(const Buffer; Count: Longint): Longint;
5045	>	begin
5046	>	if not (FField.DataSet.State in [dsEdit, dsInsert]) then
5047	>	IBError(ibxeNotEditing, [nil]);
5048	>	TIBCustomDataSet(FField.DataSet).RecordModified(True);
5049	>	TBlobField(FField).Modified := true;
5050	>	result := FBlobStream.Write(Buffer, Count);
5051	>	FHasWritten := true;
5052	>	{  TIBCustomDataSet(FField.DataSet).DataEvent(deFieldChange, PtrInt(FField));
5053	>	Removed as this caused a seek to beginning of the blob stream thus corrupting
5054	>	the blob stream. Moved to the destructor i.e. called after blob written}
5055	>	end;
5056	>
5057	>	{ TIBGenerator }
5058	>
5059	>	procedure TIBGenerator.SetIncrement(const AValue: integer);
5060	>	begin
5061	>	if AValue < 0 then
5062	>	raise Exception.Create('A Generator Increment cannot be negative');
5063	>	FIncrement := AValue
5064	>	end;
5065	>
5066	>	function TIBGenerator.GetNextValue(ADatabase: TIBDatabase;
5067	>	ATransaction: TIBTransaction): integer;
5068	>	begin
5069	>	with TIBSQL.Create(nil) do
5070	>	try
5071	>	Database := ADatabase;
5072	>	Transaction := ATransaction;
5073	>	if not assigned(Database) then
5074	>	IBError(ibxeCannotSetDatabase,[]);
5075	>	if not assigned(Transaction) then
5076	>	IBError(ibxeCannotSetTransaction,[]);
5077	>	with Transaction do
5078	>	if not InTransaction then StartTransaction;
5079	>	SQL.Text := Format('Select Gen_ID(%s,%d) as ID From RDB$Database',[FGeneratorName,Increment]);
5080	>	Prepare;
5081	>	ExecQuery;
5082	>	try
5083	>	Result := FieldByName('ID').AsInteger
5084	>	finally
5085	>	Close
5086	>	end;
5087	>	finally
5088	>	Free
5089	>	end;
5090	>	end;
5091	>
5092	>	constructor TIBGenerator.Create(Owner: TIBCustomDataSet);
5093	>	begin
5094	>	FOwner := Owner;
5095	>	FIncrement := 1;
5096	>	end;
5097	>
5098	>
5099	>	procedure TIBGenerator.Apply;
5100	>	begin
5101	>	if (FGeneratorName <> '') and (FFieldName <> '') and Owner.FieldByName(FFieldName).IsNull then
5102	>	Owner.FieldByName(FFieldName).AsInteger := GetNextValue(Owner.Database,Owner.Transaction);
5103	>	end;
5104	>
5105	>
5106	>	end.

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