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Comparing ibx/trunk/runtime/IBQuery.pas (file contents):
Revision 31 by tony, Tue Jul 14 15:31:25 2015 UTC vs.
Revision 139 by tony, Wed Jan 24 16:16:29 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                                                 }
31	<	{                                                                        }
32	<	{************************************************************************}
33	<
34	<	unit IBQuery;
35	<
36	<	interface
37	<
38	<	{$Mode Delphi}
39	<
40	<	uses
41	<	{$IFDEF WINDOWS }
42	<	Windows,
43	<	{$ELSE}
44	<	unix,
45	<	{$ENDIF}
46	<	SysUtils, Classes,  Db,
47	<	IBHeader, IB, IBCustomDataSet, IBSQL, IBSQLParser;
48	<
49	<	type
50	<
51	<	{ TIBQuery }
52	<
53	<	TIBQuery = class(TIBParserDataSet)
54	<	private
55	<	FSQL: TStrings;
56	<	FPrepared: Boolean;
57	<	FParams: TParams;
58	<	FText: string;
59	<	FRowsAffected: Integer;
60	<	FCheckRowsAffected: Boolean;
61	<	FSQLUpdating: boolean;
62	<	function GetRowsAffected: Integer;
63	<	procedure PrepareSQL;
64	<	procedure QueryChanged(Sender: TObject);
65	<	procedure ReadParamData(Reader: TReader);
66	<	procedure SetQuery(Value: TStrings);
67	<	procedure SetParamsList(Value: TParams);
68	<	procedure SetParams;
69	<	procedure SetParamsFromCursor;
70	<	procedure SetPrepared(Value: Boolean);
71	<	procedure SetPrepare(Value: Boolean);
72	<	procedure WriteParamData(Writer: TWriter);
73	<	function GetStmtHandle: TISC_STMT_HANDLE;
74	<
75	<	protected
76	<	{ IProviderSupport }
77	<	(*    procedure PSExecute; override;
78	<	function PSGetParams: TParams; override;
79	<	function PSGetTableName: string; override;
80	<	procedure PSSetCommandText(const CommandText: string); override;
81	<	procedure PSSetParams(AParams: TParams); override;  *)
82	<
83	<	function CreateParser: TSelectSQLParser; override;
84	<	procedure DefineProperties(Filer: TFiler); override;
85	<	procedure InitFieldDefs; override;
86	<	procedure InternalOpen; override;
87	<	procedure Disconnect; override;
88	<	function GetParamsCount: Word;
89	<	function GenerateQueryForLiveUpdate : Boolean;
90	<	procedure SetFiltered(Value: Boolean); override;
91	<
92	<	public
93	<	constructor Create(AOwner: TComponent); override;
94	<	destructor Destroy; override;
95	<	procedure BatchInput(InputObject: TIBBatchInput);
96	<	procedure BatchOutput(OutputObject: TIBBatchOutput);
97	<	procedure ExecSQL;
98	<	procedure GetDetailLinkFields(MasterFields, DetailFields: TList);(* override;*)
99	<	function ParamByName(const Value: string): TParam;
100	<	procedure Prepare;
101	<	procedure UnPrepare;
102	<	property Prepared: Boolean read FPrepared write SetPrepare;
103	<	property ParamCount: Word read GetParamsCount;
104	<	property StmtHandle: TISC_STMT_HANDLE read GetStmtHandle;
105	<	property StatementType;
106	<	property Text: string read FText;
107	<	property RowsAffected: Integer read GetRowsAffected;
108	<	//   property Params: TParams read FParams write SetParamsList;
109	<	property BaseSQLSelect;
110	<
111	<	published
112	<	property Active;
113	<	property AutoCommit;
114	<	property BufferChunks;
115	<	property CachedUpdates;
116	<	property DataSource read GetDataSource write SetDataSource;
117	<	property GenerateParamNames;
118	<	//   property Constraints stored ConstraintsStored;
119	<	property GeneratorField;
120	<	property ParamCheck;
121	<	property SQL: TStrings read FSQL write SetQuery;
122	<	property Params: TParams read FParams write SetParamsList;
123	<	property UniDirectional default False;
124	<	property UpdateObject;
125	<	property Filtered;
126	<	property DataSetCloseAction;
127	<
128	<	property BeforeDatabaseDisconnect;
129	<	property AfterDatabaseDisconnect;
130	<	property DatabaseFree;
131	<	property BeforeTransactionEnd;
132	<	property AfterTransactionEnd;
133	<	property TransactionFree;
134	<	property OnFilterRecord;
135	<	property OnValidatePost;
136	<	end;
137	<
138	<	implementation
139	<
140	<	{ TIBQuery }
141	<
142	<	constructor TIBQuery.Create(AOwner: TComponent);
143	<	begin
144	<	inherited Create(AOwner);
145	<	FSQL := TStringList.Create;
146	<	TStringList(SQL).OnChange := QueryChanged;
147	<	FParams := TParams.Create(Self);
148	<	ParamCheck := True;
149	<	FRowsAffected := -1;
150	<	end;
151	<
152	<	destructor TIBQuery.Destroy;
153	<	begin
154	<	Destroying;
155	<	Disconnect;
156	<	SQL.Free;
157	<	FParams.Free;
158	<	inherited Destroy;
159	<	end;
160	<
161	<	procedure TIBQuery.InitFieldDefs;
162	<	begin
163	<	inherited InitFieldDefs;
164	<	end;
165	<
166	<	procedure TIBQuery.InternalOpen;
167	<	begin
168	<	ActivateConnection();
169	<	ActivateTransaction;
170	<	QSelect.GenerateParamNames := GenerateParamNames;
171	<	SetPrepared(True);
172	<	if DataSource <> nil then
173	<	SetParamsFromCursor;
174	<	SetParams;
175	<	inherited InternalOpen;
176	<	end;
177	<
178	<	procedure TIBQuery.Disconnect;
179	<	begin
180	<	Close;
181	<	UnPrepare;
182	<	end;
183	<
184	<	procedure TIBQuery.SetPrepare(Value: Boolean);
185	<	begin
186	<	if Value then
187	<	Prepare
188	<	else
189	<	UnPrepare;
190	<	end;
191	<
192	<	procedure TIBQuery.Prepare;
193	<	begin
194	<	SetPrepared(True);
195	<	end;
196	<
197	<	procedure TIBQuery.UnPrepare;
198	<	begin
199	<	SetPrepared(False);
200	<	end;
201	<
202	<	procedure TIBQuery.SetQuery(Value: TStrings);
203	<	begin
204	<	if SQL.Text <> Value.Text then
205	<	begin
206	<	Disconnect;
207	<	SQL.BeginUpdate;
208	<	try
209	<	SQL.Assign(Value);
210	<	finally
211	<	SQL.EndUpdate;
212	<	end;
213	<	end;
214	<	end;
215	<
216	<	procedure TIBQuery.QueryChanged(Sender: TObject);
217	<	var
218	<	List: TParams;
219	<	begin
220	<	if not (csReading in ComponentState) then
221	<	begin
222	<	Disconnect;
223	<	if HasParser and not FSQLUpdating then
224	<	begin
225	<	FSQLUpdating := true;
226	<	try
227	<	SQL.Text := Parser.SQLText;
228	<	finally
229	<	FSQLUpdating := false
230	<	end;
231	<	end;
232	<	if ParamCheck or (csDesigning in ComponentState) then
233	<	begin
234	<	List := TParams.Create(Self);
235	<	try
236	<	FText := List.ParseSQL(SQL.Text, True);
237	<	List.AssignValues(FParams);
238	<	FParams.Clear;
239	<	FParams.Assign(List);
240	<	finally
241	<	List.Free;
242	<	end;
243	<	end else
244	<	FText := SQL.Text;
245	<	DataEvent(dePropertyChange, 0);
246	<	end else
247	<	FText := FParams.ParseSQL(SQL.Text, true);
248	<	SelectSQL.Assign(SQL);
249	<	end;
250	<
251	<	procedure TIBQuery.SetParamsList(Value: TParams);
252	<	begin
253	<	FParams.AssignValues(Value);
254	<	end;
255	<
256	<	function TIBQuery.GetParamsCount: Word;
257	<	begin
258	<	Result := FParams.Count;
259	<	end;
260	<
261	<	procedure TIBQuery.DefineProperties(Filer: TFiler);
262	<
263	<	function WriteData: Boolean;
264	<	begin
265	<	{The following results in a stream read error with nested frames. Hence commented out until
266	<	someone fixes the LCL }
267	<	{    if Filer.Ancestor <> nil then
268	<	Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
269	<	Result := FParams.Count > 0;
270	<	end;
271	<
272	<	begin
273	<	inherited DefineProperties(Filer);
274	<	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
275	<	end;
276	<
277	<
278	<	procedure TIBQuery.ReadParamData(Reader: TReader);
279	<	begin
280	<	FParams.Clear;
281	<	Reader.ReadValue;
282	<	Reader.ReadCollection(FParams);
283	<	end;
284	<
285	<	procedure TIBQuery.WriteParamData(Writer: TWriter);
286	<	begin
287	<	Writer.WriteCollection(Params);
288	<	end;
289	<
290	<	procedure TIBQuery.SetPrepared(Value: Boolean);
291	<	begin
292	<	CheckDatasetClosed;
293	<	if Value <> Prepared then
294	<	begin
295	<	if Value then
296	<	begin
297	<	FRowsAffected := -1;
298	<	FCheckRowsAffected := True;
299	<	if Length(Text) > 1 then PrepareSQL
300	<	else IBError(ibxeEmptySQLStatement, [nil]);
301	<	end
302	<	else
303	<	begin
304	<	if FCheckRowsAffected then
305	<	FRowsAffected := RowsAffected;
306	<	InternalUnPrepare;
307	<	end;
308	<	FPrepared := Value;
309	<	end;
310	<	end;
311	<
312	<	procedure TIBQuery.SetParamsFromCursor;
313	<	var
314	<	I: Integer;
315	<	DataSet: TDataSet;
316	<	Field: TField;
317	<
318	<	procedure CheckRequiredParams;
319	<	var
320	<	I: Integer;
321	<	begin
322	<	for I := 0 to FParams.Count - 1 do
323	<	with FParams[I] do
324	<	if not Bound then
325	<	IBError(ibxeRequiredParamNotSet, [FParams[I].Name]);
326	<	end;
327	<
328	<	begin
329	<	if DataSource <> nil then
330	<	begin
331	<	DataSet := DataSource.DataSet;
332	<	if DataSet <> nil then
333	<	begin
334	<	DataSet.FieldDefs.Update;
335	<	for I := 0 to FParams.Count - 1 do
336	<	if not FParams[I].Bound then
337	<	begin
338	<	Field := DataSet.FindField(FParams[I].Name);
339	<	if assigned(Field) then
340	<	begin
341	<	FParams[I].AssignField(Field);
342	<	FParams[I].Bound := False;
343	<	end;
344	<	end;
345	<	end
346	<	else
347	<	CheckRequiredParams;
348	<	end
349	<	else
350	<	CheckRequiredParams;
351	<	end;
352	<
353	<
354	<	function TIBQuery.ParamByName(const Value: string): TParam;
355	<	begin
356	<	Result := FParams.ParamByName(Value);
357	<	end;
358	<
359	<	procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
360	<	begin
361	<	InternalBatchInput(InputObject);
362	<	end;
363	<
364	<	procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
365	<	begin
366	<	InternalBatchOutput(OutputObject);
367	<	end;
368	<
369	<	procedure TIBQuery.ExecSQL;
370	<	var
371	<	DidActivate: Boolean;
372	<	begin
373	<	CheckInActive;
374	<	if SQL.Count <= 0 then
375	<	begin
376	<	FCheckRowsAffected := False;
377	<	IBError(ibxeEmptySQLStatement, [nil]);
378	<	end;
379	<	ActivateConnection();
380	<	DidActivate := ActivateTransaction;
381	<	try
382	<	SetPrepared(True);
383	<	if DataSource <> nil then SetParamsFromCursor;
384	<	if FParams.Count > 0 then SetParams;
385	<	InternalExecQuery;
386	<	finally
387	<	if DidActivate then
388	<	DeactivateTransaction;
389	<	FCheckRowsAffected := True;
390	<	end;
391	<	end;
392	<
393	<	procedure TIBQuery.SetParams;
394	<
395	<	var
396	<	i : integer;
397	<	Buffer: Pointer;
398	<	SQLParam: TIBXSQLVAR;
399	<
400	<	begin
401	<	for I := 0 to FParams.Count - 1 do
402	<	begin
403	<	SQLParam :=  SQLParams.ByName(Params[i].Name);
404	<	if Params[i].IsNull then
405	<	SQLParam.IsNull := True
406	<	else begin
407	<	SQLParam.IsNull := False;
408	<	case Params[i].DataType of
409	<	ftBytes:
410	<	begin
411	<	GetMem(Buffer,Params[i].GetDataSize);
412	<	try
413	<	Params[i].GetData(Buffer);
414	<	SQLParam.AsPointer := Buffer;
415	<	finally
416	<	FreeMem(Buffer);
417	<	end;
418	<	end;
419	<	ftString:
420	<	SQLParam.AsString := Params[i].AsString;
421	<	ftBoolean:
422	<	SQLParam.AsBoolean := Params[i].AsBoolean;
423	<	ftSmallint, ftWord:
424	<	SQLParam.AsShort := Params[i].AsSmallInt;
425	<	ftInteger:
426	<	SQLParam.AsLong := Params[i].AsInteger;
427	<	ftLargeInt:
428	<	SQLParam.AsInt64 := Params[i].AsLargeInt;
429	<	ftFloat:
430	<	SQLParam.AsDouble := Params[i].AsFloat;
431	<	ftBCD, ftCurrency:
432	<	SQLParam.AsCurrency := Params[i].AsCurrency;
433	<	ftDate:
434	<	SQLParam.AsDate := Params[i].AsDateTime;
435	<	ftTime:
436	<	SQLParam.AsTime := Params[i].AsDateTime;
437	<	ftDateTime:
438	<	SQLParam.AsDateTime := Params[i].AsDateTime;
439	<	ftBlob, ftMemo:
440	<	SQLParam.AsString := Params[i].AsString;
441	<	else
442	<	IBError(ibxeNotSupported, [nil]);
443	<	end;
444	<	end;
445	<	end;
446	<	end;
447	<
448	<	procedure TIBQuery.PrepareSQL;
449	<	begin
450	<	QSelect.GenerateParamNames := GenerateParamNames;
451	<	InternalPrepare;
452	<	end;
453	<
454	<
455	<	function TIBQuery.GetRowsAffected: Integer;
456	<	begin
457	<	Result := -1;
458	<	if Prepared then
459	<	Result := QSelect.RowsAffected
460	<	end;
461	<
462	<
463	<	procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
464	<
465	<	function AddFieldToList(const FieldName: string; DataSet: TDataSet;
466	<	List: TList): Boolean;
467	<	var
468	<	Field: TField;
469	<	begin
470	<	Field := DataSet.FindField(FieldName);
471	<	if (Field <> nil) then
472	<	List.Add(Field);
473	<	Result := Field <> nil;
474	<	end;
475	<
476	<	var
477	<	i: Integer;
478	<	begin
479	<	MasterFields.Clear;
480	<	DetailFields.Clear;
481	<	if (DataSource <> nil) and (DataSource.DataSet <> nil) then
482	<	for i := 0 to Params.Count - 1 do
483	<	if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
484	<	AddFieldToList(Params[i].Name, Self, DetailFields);
485	<	end;
486	<
487	<	function TIBQuery.GetStmtHandle: TISC_STMT_HANDLE;
488	<	begin
489	<	Result := SelectStmtHandle;
490	<	end;
491	<
492	<	function TIBQuery.CreateParser: TSelectSQLParser;
493	<	begin
494	<	Result := inherited CreateParser;
495	<	Result.OnSQLChanging := QueryChanged;
496	<	end;
497	<
498	<	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
499	<	begin
500	<	Result := False;
501	<	end;
502	<
503	<	procedure TIBQuery.SetFiltered(Value: Boolean);
504	<	begin
505	<	if(Filtered <> Value) then
506	<	begin
507	<	inherited SetFiltered(value);
508	<	if Active then
509	<	begin
510	<	Close;
511	<	Open;
512	<	end;
513	<	end
514	<	else
515	<	inherited SetFiltered(value);
516	<	end;
517	<
518	<	{ TIBQuery IProviderSupport }
519	<	(*
520	<	function TIBQuery.PSGetParams: TParams;
521	<	begin
522	<	Result := Params;
523	<	end;
524	<
525	<	procedure TIBQuery.PSSetParams(AParams: TParams);
526	<	begin
527	<	if AParams.Count <> 0 then
528	<	Params.Assign(AParams);
529	<	Close;
530	<	end;
531	<
532	<	function TIBQuery.PSGetTableName: string;
533	<	begin
534	<	Result := inherited PSGetTableName;
535	<	end;
536	<
537	<	procedure TIBQuery.PSExecute;
538	<	begin
539	<	ExecSQL;
540	<	end;
541	<
542	<	procedure TIBQuery.PSSetCommandText(const CommandText: string);
543	<	begin
544	<	if CommandText <> '' then
545	<	SQL.Text := CommandText;
546	<	end;
547	<	*)
548	<	end.
549	<
1	>	{************************************************************************}
2	>	{                                                                        }
3	>	{       Borland Delphi Visual Component Library                          }
4	>	{       InterBase Express core components                                }
5	>	{                                                                        }
6	>	{       Copyright (c) 1998-2000 Inprise Corporation                      }
7	>	{                                                                        }
8	>	{    InterBase Express is based in part on the product                   }
9	>	{    Free IB Components, written by Gregory H. Deatz for                 }
10	>	{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
11	>	{    Free IB Components is used under license.                           }
12	>	{                                                                        }
13	>	{    The contents of this file are subject to the InterBase              }
14	>	{    Public License Version 1.0 (the "License"); you may not             }
15	>	{    use this file except in compliance with the License. You            }
16	>	{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	>	{    Software distributed under the License is distributed on            }
18	>	{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
19	>	{    express or implied. See the License for the specific language       }
20	>	{    governing rights and limitations under the License.                 }
21	>	{    The Original Code was created by InterBase Software Corporation     }
22	>	{       and its successors.                                              }
23	>	{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
24	>	{       Corporation. All Rights Reserved.                                }
25	>	{    Contributor(s): Jeff Overcash                                       }
26	>	{                                                                        }
27	>	{    IBX For Lazarus (Firebird Express)                                  }
28	>	{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	>	{    Portions created by MWA Software are copyright McCallum Whyman      }
30	>	{    Associates Ltd 2011                                                 }
31	>	{                                                                        }
32	>	{************************************************************************}
33	>
34	>	unit IBQuery;
35	>
36	>	interface
37	>
38	>	{$Mode Delphi}
39	>
40	>	uses
41	>	{$IFDEF WINDOWS }
42	>	Windows,
43	>	{$ELSE}
44	>	unix,
45	>	{$ENDIF}
46	>	SysUtils, Classes,  Db, IB, IBCustomDataSet, IBSQL;
47	>
48	>	type
49	>
50	>	{ TIBQuery }
51	>
52	>	TIBQuery = class(TIBParserDataSet)
53	>	private
54	>	FSQL: TStrings;
55	>	FPrepared: Boolean;
56	>	FParams: TParams;
57	>	FText: string;
58	>	FSQLUpdating: boolean;
59	>	FInQueryChanged: boolean;
60	>	function GetRowsAffected: Integer;
61	>	procedure PrepareSQL;
62	>	procedure QueryChanged(Sender: TObject);
63	>	procedure ReadParamData(Reader: TReader);
64	>	procedure SetQuery(Value: TStrings);
65	>	procedure SetParamsList(Value: TParams);
66	>	procedure SetParams;
67	>	procedure SetParamsFromCursor;
68	>	procedure SetPrepared(Value: Boolean);
69	>	procedure SetPrepare(Value: Boolean);
70	>	procedure WriteParamData(Writer: TWriter);
71	>	function GetStmtHandle: IStatement;
72	>	procedure UpdateSQL;
73	>
74	>	protected
75	>	{ IProviderSupport }
76	>	(*    procedure PSExecute; override;
77	>	function PSGetParams: TParams; override;
78	>	function PSGetTableName: string; override;
79	>	procedure PSSetCommandText(const CommandText: string); override;
80	>	procedure PSSetParams(AParams: TParams); override;  *)
81	>
82	>	procedure DefineProperties(Filer: TFiler); override;
83	>	procedure InitFieldDefs; override;
84	>	procedure InternalOpen; override;
85	>	procedure Disconnect; override;
86	>	function GetParamsCount: Word;
87	>	function GenerateQueryForLiveUpdate : Boolean;
88	>	procedure SetFiltered(Value: Boolean); override;
89	>	procedure SQLChanged(Sender: TObject); override;
90	>	procedure SQLChanging(Sender: TObject); override;
91	>
92	>	public
93	>	constructor Create(AOwner: TComponent); override;
94	>	destructor Destroy; override;
95	>	procedure BatchInput(InputObject: TIBBatchInput);
96	>	procedure BatchOutput(OutputObject: TIBBatchOutput);
97	>	procedure ExecSQL;
98	>	procedure GetDetailLinkFields(MasterFields, DetailFields: TList);(* override;*)
99	>	function ParamByName(const Value: string): TParam;
100	>	procedure Prepare;
101	>	procedure UnPrepare;
102	>	procedure ResetParser; override;
103	>	property Prepared: Boolean read FPrepared write SetPrepare;
104	>	property ParamCount: Word read GetParamsCount;
105	>	property StmtHandle: IStatement read GetStmtHandle;
106	>	property StatementType;
107	>	property Text: string read FText;
108	>	property RowsAffected: Integer read GetRowsAffected;
109	>	//   property Params: TParams read FParams write SetParamsList;
110	>	property BaseSQLSelect;
111	>
112	>	published
113	>	property Active;
114	>	property AutoCommit;
115	>	property BufferChunks;
116	>	property CachedUpdates;
117	>	property DataSource read GetDataSource write SetDataSource;
118	>	property GenerateParamNames;
119	>	//   property Constraints stored ConstraintsStored;
120	>	property GeneratorField;
121	>	property ParamCheck;
122	>	property SQL: TStrings read FSQL write SetQuery;
123	>	property Params: TParams read FParams write SetParamsList;
124	>	property UniDirectional default False;
125	>	property UpdateObject;
126	>	property Filtered;
127	>	property DataSetCloseAction;
128	>
129	>	property BeforeDatabaseDisconnect;
130	>	property AfterDatabaseDisconnect;
131	>	property DatabaseFree;
132	>	property BeforeTransactionEnd;
133	>	property AfterTransactionEnd;
134	>	property TransactionFree;
135	>	property OnFilterRecord;
136	>	property OnValidatePost;
137	>	property OnDeleteReturning;
138	>	end;
139	>
140	>	implementation
141	>
142	>	uses FBMessages;
143	>
144	>	{ TIBQuery }
145	>
146	>	constructor TIBQuery.Create(AOwner: TComponent);
147	>	begin
148	>	inherited Create(AOwner);
149	>	FSQL := TStringList.Create;
150	>	TStringList(SQL).OnChange := QueryChanged;
151	>	FParams := TParams.Create(Self);
152	>	ParamCheck := True;
153	>	end;
154	>
155	>	destructor TIBQuery.Destroy;
156	>	begin
157	>	Destroying;
158	>	Disconnect;
159	>	SQL.Free;
160	>	FParams.Free;
161	>	inherited Destroy;
162	>	end;
163	>
164	>	procedure TIBQuery.InitFieldDefs;
165	>	begin
166	>	inherited InitFieldDefs;
167	>	end;
168	>
169	>	procedure TIBQuery.InternalOpen;
170	>	begin
171	>	ActivateConnection();
172	>	ActivateTransaction;
173	>	QSelect.GenerateParamNames := GenerateParamNames;
174	>	SetPrepared(True);
175	>	if DataSource <> nil then
176	>	SetParamsFromCursor;
177	>	SetParams;
178	>	inherited InternalOpen;
179	>	end;
180	>
181	>	procedure TIBQuery.Disconnect;
182	>	begin
183	>	Close;
184	>	UnPrepare;
185	>	end;
186	>
187	>	procedure TIBQuery.SetPrepare(Value: Boolean);
188	>	begin
189	>	if Value then
190	>	Prepare
191	>	else
192	>	UnPrepare;
193	>	end;
194	>
195	>	procedure TIBQuery.Prepare;
196	>	begin
197	>	SetPrepared(True);
198	>	end;
199	>
200	>	procedure TIBQuery.UnPrepare;
201	>	begin
202	>	SetPrepared(False);
203	>	end;
204	>
205	>	procedure TIBQuery.ResetParser;
206	>	begin
207	>	inherited ResetParser;
208	>	UpdateSQL;
209	>	end;
210	>
211	>	procedure TIBQuery.SetQuery(Value: TStrings);
212	>	begin
213	>	if SQL.Text <> Value.Text then
214	>	begin
215	>	Disconnect;
216	>	SQL.BeginUpdate;
217	>	try
218	>	SQL.Assign(Value);
219	>	finally
220	>	SQL.EndUpdate;
221	>	end;
222	>	end;
223	>	end;
224	>
225	>	procedure TIBQuery.QueryChanged(Sender: TObject);
226	>	begin
227	>	if FInQueryChanged then Exit;
228	>	FInQueryChanged := true;
229	>	try
230	>	if not (csReading in ComponentState) then
231	>	begin
232	>	Disconnect;
233	>	if csDesigning in ComponentState then
234	>	FText := FParams.ParseSQL(SQL.Text, true)
235	>	else
236	>	FText := SQL.Text;
237	>	DataEvent(dePropertyChange, 0);
238	>	end else
239	>	FText := FParams.ParseSQL(SQL.Text, true);
240	>
241	>	if not FSQLUpdating then
242	>	begin
243	>	Prepared := false;
244	>	SelectSQL.Assign(SQL);
245	>	end;
246	>	finally
247	>	FInQueryChanged := false;
248	>	end;
249	>	end;
250	>
251	>	procedure TIBQuery.SetParamsList(Value: TParams);
252	>	begin
253	>	FParams.AssignValues(Value);
254	>	end;
255	>
256	>	function TIBQuery.GetParamsCount: Word;
257	>	begin
258	>	Result := FParams.Count;
259	>	end;
260	>
261	>	procedure TIBQuery.DefineProperties(Filer: TFiler);
262	>
263	>	function WriteData: Boolean;
264	>	begin
265	>	{The following results in a stream read error with nested frames. Hence commented out until
266	>	someone fixes the LCL }
267	>	{    if Filer.Ancestor <> nil then
268	>	Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
269	>	Result := FParams.Count > 0;
270	>	end;
271	>
272	>	begin
273	>	inherited DefineProperties(Filer);
274	>	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
275	>	end;
276	>
277	>
278	>	procedure TIBQuery.ReadParamData(Reader: TReader);
279	>	begin
280	>	FParams.Clear;
281	>	Reader.ReadValue;
282	>	Reader.ReadCollection(FParams);
283	>	end;
284	>
285	>	procedure TIBQuery.WriteParamData(Writer: TWriter);
286	>	begin
287	>	Writer.WriteCollection(Params);
288	>	end;
289	>
290	>	procedure TIBQuery.SetPrepared(Value: Boolean);
291	>	begin
292	>	CheckDatasetClosed;
293	>	if Value <> Prepared then
294	>	begin
295	>	if Value then
296	>	begin
297	>	if Length(Text) > 1 then PrepareSQL
298	>	else IBError(ibxeEmptySQLStatement, [nil]);
299	>	end
300	>	else
301	>	begin
302	>	InternalUnPrepare;
303	>	FParams.Clear;
304	>	end;
305	>	FPrepared := Value;
306	>	end;
307	>	end;
308	>
309	>	procedure TIBQuery.SetParamsFromCursor;
310	>	var
311	>	I: Integer;
312	>	DataSet: TDataSet;
313	>	Field: TField;
314	>
315	>	procedure CheckRequiredParams;
316	>	var
317	>	I: Integer;
318	>	begin
319	>	for I := 0 to FParams.Count - 1 do
320	>	with FParams[I] do
321	>	if not Bound then
322	>	IBError(ibxeRequiredParamNotSet, [FParams[I].Name]);
323	>	end;
324	>
325	>	begin
326	>	if DataSource <> nil then
327	>	begin
328	>	DataSet := DataSource.DataSet;
329	>	if DataSet <> nil then
330	>	begin
331	>	DataSet.FieldDefs.Update;
332	>	for I := 0 to FParams.Count - 1 do
333	>	if not FParams[I].Bound then
334	>	begin
335	>	Field := DataSet.FindField(FParams[I].Name);
336	>	if assigned(Field) then
337	>	begin
338	>	FParams[I].AssignField(Field);
339	>	FParams[I].Bound := False;
340	>	end;
341	>	end;
342	>	end
343	>	else
344	>	CheckRequiredParams;
345	>	end
346	>	else
347	>	CheckRequiredParams;
348	>	end;
349	>
350	>
351	>	function TIBQuery.ParamByName(const Value: string): TParam;
352	>	begin
353	>	if not Prepared then
354	>	Prepare;
355	>	Result := FParams.ParamByName(Value);
356	>	end;
357	>
358	>	procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
359	>	begin
360	>	InternalBatchInput(InputObject);
361	>	end;
362	>
363	>	procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
364	>	begin
365	>	InternalBatchOutput(OutputObject);
366	>	end;
367	>
368	>	procedure TIBQuery.ExecSQL;
369	>	var
370	>	DidActivate: Boolean;
371	>	begin
372	>	CheckInActive;
373	>	if SQL.Count <= 0 then
374	>	IBError(ibxeEmptySQLStatement, [nil]);
375	>
376	>	ActivateConnection();
377	>	DidActivate := ActivateTransaction;
378	>	try
379	>	SetPrepared(True);
380	>	if DataSource <> nil then SetParamsFromCursor;
381	>	if FParams.Count > 0 then SetParams;
382	>	InternalExecQuery;
383	>	finally
384	>	if DidActivate then
385	>	DeactivateTransaction;
386	>	end;
387	>	end;
388	>
389	>	procedure TIBQuery.SetParams;
390	>
391	>	var
392	>	i : integer;
393	>	Buffer: Pointer;
394	>	SQLParam: ISQLParam;
395	>
396	>	begin
397	>	for I := 0 to FParams.Count - 1 do
398	>	begin
399	>	SQLParam :=  SQLParams.ByName(Params[i].Name);
400	>	if Params[i].IsNull then
401	>	SQLParam.IsNull := True
402	>	else begin
403	>	SQLParam.IsNull := False;
404	>	case Params[i].DataType of
405	>	ftBytes:
406	>	begin
407	>	GetMem(Buffer,Params[i].GetDataSize);
408	>	try
409	>	Params[i].GetData(Buffer);
410	>	SQLParam.AsPointer := Buffer;
411	>	finally
412	>	FreeMem(Buffer);
413	>	end;
414	>	end;
415	>	ftString:
416	>	SQLParam.AsString := Params[i].AsString;
417	>	ftBoolean:
418	>	SQLParam.AsBoolean := Params[i].AsBoolean;
419	>	ftSmallint, ftWord:
420	>	SQLParam.AsShort := Params[i].AsSmallInt;
421	>	ftInteger:
422	>	SQLParam.AsLong := Params[i].AsInteger;
423	>	ftLargeInt:
424	>	SQLParam.AsInt64 := Params[i].AsLargeInt;
425	>	ftFloat:
426	>	SQLParam.AsDouble := Params[i].AsFloat;
427	>	ftBCD, ftCurrency:
428	>	SQLParam.AsCurrency := Params[i].AsCurrency;
429	>	ftDate:
430	>	SQLParam.AsDate := Params[i].AsDateTime;
431	>	ftTime:
432	>	SQLParam.AsTime := Params[i].AsDateTime;
433	>	ftDateTime:
434	>	SQLParam.AsDateTime := Params[i].AsDateTime;
435	>	ftBlob, ftMemo:
436	>	SQLParam.AsString := Params[i].AsString;
437	>	else
438	>	IBError(ibxeNotSupported, [nil]);
439	>	end;
440	>	end;
441	>	end;
442	>	end;
443	>
444	>	procedure TIBQuery.PrepareSQL;
445	>	var List: TParams;
446	>	begin
447	>	QSelect.GenerateParamNames := GenerateParamNames;
448	>	InternalPrepare;
449	>	UpdateSQL;
450	>	if ParamCheck  then
451	>	begin
452	>	List := TParams.Create(Self);
453	>	try
454	>	FText := List.ParseSQL(SQL.Text, True);
455	>	List.AssignValues(FParams);
456	>	FParams.Clear;
457	>	FParams.Assign(List);
458	>	finally
459	>	List.Free;
460	>	end;
461	>	end;
462	>	end;
463	>
464	>
465	>	function TIBQuery.GetRowsAffected: Integer;
466	>	begin
467	>	Result := -1;
468	>	if Prepared then
469	>	Result := QSelect.RowsAffected
470	>	end;
471	>
472	>
473	>	procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
474	>
475	>	function AddFieldToList(const FieldName: string; DataSet: TDataSet;
476	>	List: TList): Boolean;
477	>	var
478	>	Field: TField;
479	>	begin
480	>	Field := DataSet.FindField(FieldName);
481	>	if (Field <> nil) then
482	>	List.Add(Field);
483	>	Result := Field <> nil;
484	>	end;
485	>
486	>	var
487	>	i: Integer;
488	>	begin
489	>	MasterFields.Clear;
490	>	DetailFields.Clear;
491	>	if (DataSource <> nil) and (DataSource.DataSet <> nil) then
492	>	for i := 0 to Params.Count - 1 do
493	>	if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
494	>	AddFieldToList(Params[i].Name, Self, DetailFields);
495	>	end;
496	>
497	>	function TIBQuery.GetStmtHandle: IStatement;
498	>	begin
499	>	Result := SelectStmtHandle;
500	>	end;
501	>
502	>	procedure TIBQuery.UpdateSQL;
503	>	begin
504	>	if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
505	>	begin
506	>	FSQLUpdating := true;
507	>	try
508	>	SQL.Text := SelectSQL.Text;
509	>	finally
510	>	FSQLUpdating := false
511	>	end;
512	>	end;
513	>	end;
514	>
515	>	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
516	>	begin
517	>	Result := False;
518	>	end;
519	>
520	>	procedure TIBQuery.SetFiltered(Value: Boolean);
521	>	begin
522	>	if(Filtered <> Value) then
523	>	begin
524	>	inherited SetFiltered(value);
525	>	if Active then
526	>	begin
527	>	Close;
528	>	Open;
529	>	end;
530	>	end
531	>	else
532	>	inherited SetFiltered(value);
533	>	end;
534	>
535	>	procedure TIBQuery.SQLChanged(Sender: TObject);
536	>	begin
537	>	inherited SQLChanged(Sender);
538	>	UpdateSQL;
539	>	end;
540	>
541	>	procedure TIBQuery.SQLChanging(Sender: TObject);
542	>	begin
543	>	inherited SQLChanging(Sender);
544	>	Prepared := false;
545	>	end;
546	>
547	>	{ TIBQuery IProviderSupport }
548	>	(*
549	>	function TIBQuery.PSGetParams: TParams;
550	>	begin
551	>	Result := Params;
552	>	end;
553	>
554	>	procedure TIBQuery.PSSetParams(AParams: TParams);
555	>	begin
556	>	if AParams.Count <> 0 then
557	>	Params.Assign(AParams);
558	>	Close;
559	>	end;
560	>
561	>	function TIBQuery.PSGetTableName: string;
562	>	begin
563	>	Result := inherited PSGetTableName;
564	>	end;
565	>
566	>	procedure TIBQuery.PSExecute;
567	>	begin
568	>	ExecSQL;
569	>	end;
570	>
571	>	procedure TIBQuery.PSSetCommandText(const CommandText: string);
572	>	begin
573	>	if CommandText <> '' then
574	>	SQL.Text := CommandText;
575	>	end;
576	>	*)
577	>	end.
578	>

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