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Comparing ibx/trunk/runtime/IBQuery.pas (file contents):
Revision 21 by tony, Thu Feb 26 10:33:34 2015 UTC vs.
Revision 118 by tony, Mon Jan 22 13:58:14 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, Graphics, Classes, Controls, 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(Value: PChar);
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 BufferChunks;
114	<	property CachedUpdates;
115	<	property DataSource read GetDataSource write SetDataSource;
116	<	property GenerateParamNames;
117	<	//   property Constraints stored ConstraintsStored;
118	<	property GeneratorField;
119	<	property ParamCheck;
120	<	property SQL: TStrings read FSQL write SetQuery;
121	<	property Params: TParams read FParams write SetParamsList;
122	<	property UniDirectional default False;
123	<	property UpdateObject;
124	<	property Filtered;
125	<
126	<	property BeforeDatabaseDisconnect;
127	<	property AfterDatabaseDisconnect;
128	<	property DatabaseFree;
129	<	property BeforeTransactionEnd;
130	<	property AfterTransactionEnd;
131	<	property TransactionFree;
132	<	property OnFilterRecord;
133	<	end;
134	<
135	<	implementation
136	<
137	<	{ TIBQuery }
138	<
139	<	constructor TIBQuery.Create(AOwner: TComponent);
140	<	begin
141	<	inherited Create(AOwner);
142	<	FSQL := TStringList.Create;
143	<	TStringList(SQL).OnChange := QueryChanged;
144	<	FParams := TParams.Create(Self);
145	<	ParamCheck := True;
146	<	FRowsAffected := -1;
147	<	end;
148	<
149	<	destructor TIBQuery.Destroy;
150	<	begin
151	<	Destroying;
152	<	Disconnect;
153	<	SQL.Free;
154	<	FParams.Free;
155	<	inherited Destroy;
156	<	end;
157	<
158	<	procedure TIBQuery.InitFieldDefs;
159	<	begin
160	<	inherited InitFieldDefs;
161	<	end;
162	<
163	<	procedure TIBQuery.InternalOpen;
164	<	begin
165	<	ActivateConnection();
166	<	ActivateTransaction;
167	<	QSelect.GenerateParamNames := GenerateParamNames;
168	<	SetPrepared(True);
169	<	if DataSource <> nil then
170	<	SetParamsFromCursor;
171	<	SetParams;
172	<	inherited InternalOpen;
173	<	end;
174	<
175	<	procedure TIBQuery.Disconnect;
176	<	begin
177	<	Close;
178	<	UnPrepare;
179	<	end;
180	<
181	<	procedure TIBQuery.SetPrepare(Value: Boolean);
182	<	begin
183	<	if Value then
184	<	Prepare
185	<	else
186	<	UnPrepare;
187	<	end;
188	<
189	<	procedure TIBQuery.Prepare;
190	<	begin
191	<	SetPrepared(True);
192	<	end;
193	<
194	<	procedure TIBQuery.UnPrepare;
195	<	begin
196	<	SetPrepared(False);
197	<	end;
198	<
199	<	procedure TIBQuery.SetQuery(Value: TStrings);
200	<	begin
201	<	if SQL.Text <> Value.Text then
202	<	begin
203	<	Disconnect;
204	<	SQL.BeginUpdate;
205	<	try
206	<	SQL.Assign(Value);
207	<	finally
208	<	SQL.EndUpdate;
209	<	end;
210	<	end;
211	<	end;
212	<
213	<	procedure TIBQuery.QueryChanged(Sender: TObject);
214	<	var
215	<	List: TParams;
216	<	begin
217	<	if not (csReading in ComponentState) then
218	<	begin
219	<	Disconnect;
220	<	if HasParser and not FSQLUpdating then
221	<	begin
222	<	FSQLUpdating := true;
223	<	try
224	<	SQL.Text := Parser.SQLText;
225	<	finally
226	<	FSQLUpdating := false
227	<	end;
228	<	end;
229	<	if ParamCheck or (csDesigning in ComponentState) then
230	<	begin
231	<	List := TParams.Create(Self);
232	<	try
233	<	FText := List.ParseSQL(SQL.Text, True);
234	<	List.AssignValues(FParams);
235	<	FParams.Clear;
236	<	FParams.Assign(List);
237	<	finally
238	<	List.Free;
239	<	end;
240	<	end else
241	<	FText := SQL.Text;
242	<	DataEvent(dePropertyChange, 0);
243	<	end else
244	<	FText := FParams.ParseSQL(SQL.Text, true);
245	<	SelectSQL.Assign(SQL);
246	<	end;
247	<
248	<	procedure TIBQuery.SetParamsList(Value: TParams);
249	<	begin
250	<	FParams.AssignValues(Value);
251	<	end;
252	<
253	<	function TIBQuery.GetParamsCount: Word;
254	<	begin
255	<	Result := FParams.Count;
256	<	end;
257	<
258	<	procedure TIBQuery.DefineProperties(Filer: TFiler);
259	<
260	<	function WriteData: Boolean;
261	<	begin
262	<	{The following results in a stream read error with nested frames. Hence commented out until
263	<	someone fixes the LCL }
264	<	{    if Filer.Ancestor <> nil then
265	<	Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
266	<	Result := FParams.Count > 0;
267	<	end;
268	<
269	<	begin
270	<	inherited DefineProperties(Filer);
271	<	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
272	<	end;
273	<
274	<
275	<	procedure TIBQuery.ReadParamData(Reader: TReader);
276	<	begin
277	<	FParams.Clear;
278	<	Reader.ReadValue;
279	<	Reader.ReadCollection(FParams);
280	<	end;
281	<
282	<	procedure TIBQuery.WriteParamData(Writer: TWriter);
283	<	begin
284	<	Writer.WriteCollection(Params);
285	<	end;
286	<
287	<	procedure TIBQuery.SetPrepared(Value: Boolean);
288	<	begin
289	<	CheckDatasetClosed;
290	<	if Value <> Prepared then
291	<	begin
292	<	if Value then
293	<	begin
294	<	FRowsAffected := -1;
295	<	FCheckRowsAffected := True;
296	<	if Length(Text) > 1 then PrepareSQL(PChar(Text))
297	<	else IBError(ibxeEmptySQLStatement, [nil]);
298	<	end
299	<	else
300	<	begin
301	<	if FCheckRowsAffected then
302	<	FRowsAffected := RowsAffected;
303	<	InternalUnPrepare;
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, [nil]);
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	<	Result := FParams.ParamByName(Value);
354	<	end;
355	<
356	<	procedure TIBQuery.BatchInput(InputObject: TIBBatchInput);
357	<	begin
358	<	InternalBatchInput(InputObject);
359	<	end;
360	<
361	<	procedure TIBQuery.BatchOutput(OutputObject: TIBBatchOutput);
362	<	begin
363	<	InternalBatchOutput(OutputObject);
364	<	end;
365	<
366	<	procedure TIBQuery.ExecSQL;
367	<	var
368	<	DidActivate: Boolean;
369	<	begin
370	<	CheckInActive;
371	<	if SQL.Count <= 0 then
372	<	begin
373	<	FCheckRowsAffected := False;
374	<	IBError(ibxeEmptySQLStatement, [nil]);
375	<	end;
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	<	FCheckRowsAffected := True;
387	<	end;
388	<	end;
389	<
390	<	procedure TIBQuery.SetParams;
391	<
392	<	var
393	<	i : integer;
394	<	Buffer: Pointer;
395	<	SQLParam: TIBXSQLVAR;
396	<
397	<	begin
398	<	for I := 0 to FParams.Count - 1 do
399	<	begin
400	<	SQLParam :=  SQLParams.ByName(Params[i].Name);
401	<	if Params[i].IsNull then
402	<	SQLParam.IsNull := True
403	<	else begin
404	<	SQLParam.IsNull := False;
405	<	case Params[i].DataType of
406	<	ftBytes:
407	<	begin
408	<	GetMem(Buffer,Params[i].GetDataSize);
409	<	try
410	<	Params[i].GetData(Buffer);
411	<	SQLParam.AsPointer := Buffer;
412	<	finally
413	<	FreeMem(Buffer);
414	<	end;
415	<	end;
416	<	ftString:
417	<	SQLParam.AsString := Params[i].AsString;
418	<	ftBoolean, ftSmallint, ftWord:
419	<	SQLParam.AsShort := Params[i].AsSmallInt;
420	<	ftInteger:
421	<	SQLParam.AsLong := Params[i].AsInteger;
422	<	ftLargeInt:
423	<	SQLParam.AsInt64 := Params[i].AsLargeInt;
424	<	ftFloat:
425	<	SQLParam.AsDouble := Params[i].AsFloat;
426	<	ftBCD, ftCurrency:
427	<	SQLParam.AsCurrency := Params[i].AsCurrency;
428	<	ftDate:
429	<	SQLParam.AsDate := Params[i].AsDateTime;
430	<	ftTime:
431	<	SQLParam.AsTime := Params[i].AsDateTime;
432	<	ftDateTime:
433	<	SQLParam.AsDateTime := Params[i].AsDateTime;
434	<	ftBlob, ftMemo:
435	<	SQLParam.AsString := Params[i].AsString;
436	<	else
437	<	IBError(ibxeNotSupported, [nil]);
438	<	end;
439	<	end;
440	<	end;
441	<	end;
442	<
443	<	procedure TIBQuery.PrepareSQL(Value: PChar);
444	<	begin
445	<	QSelect.GenerateParamNames := GenerateParamNames;
446	<	InternalPrepare;
447	<	end;
448	<
449	<
450	<	function TIBQuery.GetRowsAffected: Integer;
451	<	begin
452	<	Result := -1;
453	<	if Prepared then
454	<	Result := QSelect.RowsAffected
455	<	end;
456	<
457	<
458	<	procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
459	<
460	<	function AddFieldToList(const FieldName: string; DataSet: TDataSet;
461	<	List: TList): Boolean;
462	<	var
463	<	Field: TField;
464	<	begin
465	<	Field := DataSet.FindField(FieldName);
466	<	if (Field <> nil) then
467	<	List.Add(Field);
468	<	Result := Field <> nil;
469	<	end;
470	<
471	<	var
472	<	i: Integer;
473	<	begin
474	<	MasterFields.Clear;
475	<	DetailFields.Clear;
476	<	if (DataSource <> nil) and (DataSource.DataSet <> nil) then
477	<	for i := 0 to Params.Count - 1 do
478	<	if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
479	<	AddFieldToList(Params[i].Name, Self, DetailFields);
480	<	end;
481	<
482	<	function TIBQuery.GetStmtHandle: TISC_STMT_HANDLE;
483	<	begin
484	<	Result := SelectStmtHandle;
485	<	end;
486	<
487	<	function TIBQuery.CreateParser: TSelectSQLParser;
488	<	begin
489	<	Result := inherited CreateParser;
490	<	Result.OnSQLChanging := QueryChanged;
491	<	end;
492	<
493	<	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
494	<	begin
495	<	Result := False;
496	<	end;
497	<
498	<	procedure TIBQuery.SetFiltered(Value: Boolean);
499	<	begin
500	<	if(Filtered <> Value) then
501	<	begin
502	<	inherited SetFiltered(value);
503	<	if Active then
504	<	begin
505	<	Close;
506	<	Open;
507	<	end;
508	<	end
509	<	else
510	<	inherited SetFiltered(value);
511	<	end;
512	<
513	<	{ TIBQuery IProviderSupport }
514	<	(*
515	<	function TIBQuery.PSGetParams: TParams;
516	<	begin
517	<	Result := Params;
518	<	end;
519	<
520	<	procedure TIBQuery.PSSetParams(AParams: TParams);
521	<	begin
522	<	if AParams.Count <> 0 then
523	<	Params.Assign(AParams);
524	<	Close;
525	<	end;
526	<
527	<	function TIBQuery.PSGetTableName: string;
528	<	begin
529	<	Result := inherited PSGetTableName;
530	<	end;
531	<
532	<	procedure TIBQuery.PSExecute;
533	<	begin
534	<	ExecSQL;
535	<	end;
536	<
537	<	procedure TIBQuery.PSSetCommandText(const CommandText: string);
538	<	begin
539	<	if CommandText <> '' then
540	<	SQL.Text := CommandText;
541	<	end;
542	<	*)
543	<	end.
544	<
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	>	FSQLUpdating: boolean;
60	>	FInQueryChanged: boolean;
61	>	function GetRowsAffected: Integer;
62	>	procedure PrepareSQL;
63	>	procedure QueryChanged(Sender: TObject);
64	>	procedure ReadParamData(Reader: TReader);
65	>	procedure SetQuery(Value: TStrings);
66	>	procedure SetParamsList(Value: TParams);
67	>	procedure SetParams;
68	>	procedure SetParamsFromCursor;
69	>	procedure SetPrepared(Value: Boolean);
70	>	procedure SetPrepare(Value: Boolean);
71	>	procedure WriteParamData(Writer: TWriter);
72	>	function GetStmtHandle: IStatement;
73	>	procedure UpdateSQL;
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	>	procedure DefineProperties(Filer: TFiler); override;
84	>	procedure InitFieldDefs; override;
85	>	procedure InternalOpen; override;
86	>	procedure Disconnect; override;
87	>	function GetParamsCount: Word;
88	>	function GenerateQueryForLiveUpdate : Boolean;
89	>	procedure SetFiltered(Value: Boolean); override;
90	>	procedure SQLChanged(Sender: TObject); override;
91	>	procedure SQLChanging(Sender: TObject); override;
92	>
93	>	public
94	>	constructor Create(AOwner: TComponent); override;
95	>	destructor Destroy; override;
96	>	procedure BatchInput(InputObject: TIBBatchInput);
97	>	procedure BatchOutput(OutputObject: TIBBatchOutput);
98	>	procedure ExecSQL;
99	>	procedure GetDetailLinkFields(MasterFields, DetailFields: TList);(* override;*)
100	>	function ParamByName(const Value: string): TParam;
101	>	procedure Prepare;
102	>	procedure UnPrepare;
103	>	procedure ResetParser; override;
104	>	property Prepared: Boolean read FPrepared write SetPrepare;
105	>	property ParamCount: Word read GetParamsCount;
106	>	property StmtHandle: IStatement read GetStmtHandle;
107	>	property StatementType;
108	>	property Text: string read FText;
109	>	property RowsAffected: Integer read GetRowsAffected;
110	>	//   property Params: TParams read FParams write SetParamsList;
111	>	property BaseSQLSelect;
112	>
113	>	published
114	>	property Active;
115	>	property AutoCommit;
116	>	property BufferChunks;
117	>	property CachedUpdates;
118	>	property DataSource read GetDataSource write SetDataSource;
119	>	property GenerateParamNames;
120	>	//   property Constraints stored ConstraintsStored;
121	>	property GeneratorField;
122	>	property ParamCheck;
123	>	property SQL: TStrings read FSQL write SetQuery;
124	>	property Params: TParams read FParams write SetParamsList;
125	>	property UniDirectional default False;
126	>	property UpdateObject;
127	>	property Filtered;
128	>	property DataSetCloseAction;
129	>
130	>	property BeforeDatabaseDisconnect;
131	>	property AfterDatabaseDisconnect;
132	>	property DatabaseFree;
133	>	property BeforeTransactionEnd;
134	>	property AfterTransactionEnd;
135	>	property TransactionFree;
136	>	property OnFilterRecord;
137	>	property OnValidatePost;
138	>	property OnDeleteReturning;
139	>	end;
140	>
141	>	implementation
142	>
143	>	uses FBMessages;
144	>
145	>	{ TIBQuery }
146	>
147	>	constructor TIBQuery.Create(AOwner: TComponent);
148	>	begin
149	>	inherited Create(AOwner);
150	>	FSQL := TStringList.Create;
151	>	TStringList(SQL).OnChange := QueryChanged;
152	>	FParams := TParams.Create(Self);
153	>	ParamCheck := True;
154	>	end;
155	>
156	>	destructor TIBQuery.Destroy;
157	>	begin
158	>	Destroying;
159	>	Disconnect;
160	>	SQL.Free;
161	>	FParams.Free;
162	>	inherited Destroy;
163	>	end;
164	>
165	>	procedure TIBQuery.InitFieldDefs;
166	>	begin
167	>	inherited InitFieldDefs;
168	>	end;
169	>
170	>	procedure TIBQuery.InternalOpen;
171	>	begin
172	>	ActivateConnection();
173	>	ActivateTransaction;
174	>	QSelect.GenerateParamNames := GenerateParamNames;
175	>	SetPrepared(True);
176	>	if DataSource <> nil then
177	>	SetParamsFromCursor;
178	>	SetParams;
179	>	inherited InternalOpen;
180	>	end;
181	>
182	>	procedure TIBQuery.Disconnect;
183	>	begin
184	>	Close;
185	>	UnPrepare;
186	>	end;
187	>
188	>	procedure TIBQuery.SetPrepare(Value: Boolean);
189	>	begin
190	>	if Value then
191	>	Prepare
192	>	else
193	>	UnPrepare;
194	>	end;
195	>
196	>	procedure TIBQuery.Prepare;
197	>	begin
198	>	SetPrepared(True);
199	>	end;
200	>
201	>	procedure TIBQuery.UnPrepare;
202	>	begin
203	>	SetPrepared(False);
204	>	end;
205	>
206	>	procedure TIBQuery.ResetParser;
207	>	begin
208	>	inherited ResetParser;
209	>	UpdateSQL;
210	>	end;
211	>
212	>	procedure TIBQuery.SetQuery(Value: TStrings);
213	>	begin
214	>	if SQL.Text <> Value.Text then
215	>	begin
216	>	Disconnect;
217	>	SQL.BeginUpdate;
218	>	try
219	>	SQL.Assign(Value);
220	>	finally
221	>	SQL.EndUpdate;
222	>	end;
223	>	end;
224	>	end;
225	>
226	>	procedure TIBQuery.QueryChanged(Sender: TObject);
227	>	begin
228	>	if FInQueryChanged then Exit;
229	>	FInQueryChanged := true;
230	>	try
231	>	if not (csReading in ComponentState) then
232	>	begin
233	>	Disconnect;
234	>	if csDesigning in ComponentState then
235	>	FText := FParams.ParseSQL(SQL.Text, true)
236	>	else
237	>	FText := SQL.Text;
238	>	DataEvent(dePropertyChange, 0);
239	>	end else
240	>	FText := FParams.ParseSQL(SQL.Text, true);
241	>
242	>	if not FSQLUpdating then
243	>	begin
244	>	Prepared := false;
245	>	SelectSQL.Assign(SQL);
246	>	end;
247	>	finally
248	>	FInQueryChanged := false;
249	>	end;
250	>	end;
251	>
252	>	procedure TIBQuery.SetParamsList(Value: TParams);
253	>	begin
254	>	FParams.AssignValues(Value);
255	>	end;
256	>
257	>	function TIBQuery.GetParamsCount: Word;
258	>	begin
259	>	Result := FParams.Count;
260	>	end;
261	>
262	>	procedure TIBQuery.DefineProperties(Filer: TFiler);
263	>
264	>	function WriteData: Boolean;
265	>	begin
266	>	{The following results in a stream read error with nested frames. Hence commented out until
267	>	someone fixes the LCL }
268	>	{    if Filer.Ancestor <> nil then
269	>	Result := not FParams.IsEqual(TIBQuery(Filer.Ancestor).FParams) else}
270	>	Result := FParams.Count > 0;
271	>	end;
272	>
273	>	begin
274	>	inherited DefineProperties(Filer);
275	>	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
276	>	end;
277	>
278	>
279	>	procedure TIBQuery.ReadParamData(Reader: TReader);
280	>	begin
281	>	FParams.Clear;
282	>	Reader.ReadValue;
283	>	Reader.ReadCollection(FParams);
284	>	end;
285	>
286	>	procedure TIBQuery.WriteParamData(Writer: TWriter);
287	>	begin
288	>	Writer.WriteCollection(Params);
289	>	end;
290	>
291	>	procedure TIBQuery.SetPrepared(Value: Boolean);
292	>	begin
293	>	CheckDatasetClosed;
294	>	if Value <> Prepared then
295	>	begin
296	>	if Value then
297	>	begin
298	>	if Length(Text) > 1 then PrepareSQL
299	>	else IBError(ibxeEmptySQLStatement, [nil]);
300	>	end
301	>	else
302	>	begin
303	>	InternalUnPrepare;
304	>	FParams.Clear;
305	>	end;
306	>	FPrepared := Value;
307	>	end;
308	>	end;
309	>
310	>	procedure TIBQuery.SetParamsFromCursor;
311	>	var
312	>	I: Integer;
313	>	DataSet: TDataSet;
314	>	Field: TField;
315	>
316	>	procedure CheckRequiredParams;
317	>	var
318	>	I: Integer;
319	>	begin
320	>	for I := 0 to FParams.Count - 1 do
321	>	with FParams[I] do
322	>	if not Bound then
323	>	IBError(ibxeRequiredParamNotSet, [FParams[I].Name]);
324	>	end;
325	>
326	>	begin
327	>	if DataSource <> nil then
328	>	begin
329	>	DataSet := DataSource.DataSet;
330	>	if DataSet <> nil then
331	>	begin
332	>	DataSet.FieldDefs.Update;
333	>	for I := 0 to FParams.Count - 1 do
334	>	if not FParams[I].Bound then
335	>	begin
336	>	Field := DataSet.FindField(FParams[I].Name);
337	>	if assigned(Field) then
338	>	begin
339	>	FParams[I].AssignField(Field);
340	>	FParams[I].Bound := False;
341	>	end;
342	>	end;
343	>	end
344	>	else
345	>	CheckRequiredParams;
346	>	end
347	>	else
348	>	CheckRequiredParams;
349	>	end;
350	>
351	>
352	>	function TIBQuery.ParamByName(const Value: string): TParam;
353	>	begin
354	>	if not Prepared then
355	>	Prepare;
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	>	IBError(ibxeEmptySQLStatement, [nil]);
376	>
377	>	ActivateConnection();
378	>	DidActivate := ActivateTransaction;
379	>	try
380	>	SetPrepared(True);
381	>	if DataSource <> nil then SetParamsFromCursor;
382	>	if FParams.Count > 0 then SetParams;
383	>	InternalExecQuery;
384	>	finally
385	>	if DidActivate then
386	>	DeactivateTransaction;
387	>	end;
388	>	end;
389	>
390	>	procedure TIBQuery.SetParams;
391	>
392	>	var
393	>	i : integer;
394	>	Buffer: Pointer;
395	>	SQLParam: ISQLParam;
396	>
397	>	begin
398	>	for I := 0 to FParams.Count - 1 do
399	>	begin
400	>	SQLParam :=  SQLParams.ByName(Params[i].Name);
401	>	if Params[i].IsNull then
402	>	SQLParam.IsNull := True
403	>	else begin
404	>	SQLParam.IsNull := False;
405	>	case Params[i].DataType of
406	>	ftBytes:
407	>	begin
408	>	GetMem(Buffer,Params[i].GetDataSize);
409	>	try
410	>	Params[i].GetData(Buffer);
411	>	SQLParam.AsPointer := Buffer;
412	>	finally
413	>	FreeMem(Buffer);
414	>	end;
415	>	end;
416	>	ftString:
417	>	SQLParam.AsString := Params[i].AsString;
418	>	ftBoolean:
419	>	SQLParam.AsBoolean := Params[i].AsBoolean;
420	>	ftSmallint, ftWord:
421	>	SQLParam.AsShort := Params[i].AsSmallInt;
422	>	ftInteger:
423	>	SQLParam.AsLong := Params[i].AsInteger;
424	>	ftLargeInt:
425	>	SQLParam.AsInt64 := Params[i].AsLargeInt;
426	>	ftFloat:
427	>	SQLParam.AsDouble := Params[i].AsFloat;
428	>	ftBCD, ftCurrency:
429	>	SQLParam.AsCurrency := Params[i].AsCurrency;
430	>	ftDate:
431	>	SQLParam.AsDate := Params[i].AsDateTime;
432	>	ftTime:
433	>	SQLParam.AsTime := Params[i].AsDateTime;
434	>	ftDateTime:
435	>	SQLParam.AsDateTime := Params[i].AsDateTime;
436	>	ftBlob, ftMemo:
437	>	SQLParam.AsString := Params[i].AsString;
438	>	else
439	>	IBError(ibxeNotSupported, [nil]);
440	>	end;
441	>	end;
442	>	end;
443	>	end;
444	>
445	>	procedure TIBQuery.PrepareSQL;
446	>	var List: TParams;
447	>	begin
448	>	QSelect.GenerateParamNames := GenerateParamNames;
449	>	InternalPrepare;
450	>	UpdateSQL;
451	>	if ParamCheck  then
452	>	begin
453	>	List := TParams.Create(Self);
454	>	try
455	>	FText := List.ParseSQL(SQL.Text, True);
456	>	List.AssignValues(FParams);
457	>	FParams.Clear;
458	>	FParams.Assign(List);
459	>	finally
460	>	List.Free;
461	>	end;
462	>	end;
463	>	end;
464	>
465	>
466	>	function TIBQuery.GetRowsAffected: Integer;
467	>	begin
468	>	Result := -1;
469	>	if Prepared then
470	>	Result := QSelect.RowsAffected
471	>	end;
472	>
473	>
474	>	procedure TIBQuery.GetDetailLinkFields(MasterFields, DetailFields: TList);
475	>
476	>	function AddFieldToList(const FieldName: string; DataSet: TDataSet;
477	>	List: TList): Boolean;
478	>	var
479	>	Field: TField;
480	>	begin
481	>	Field := DataSet.FindField(FieldName);
482	>	if (Field <> nil) then
483	>	List.Add(Field);
484	>	Result := Field <> nil;
485	>	end;
486	>
487	>	var
488	>	i: Integer;
489	>	begin
490	>	MasterFields.Clear;
491	>	DetailFields.Clear;
492	>	if (DataSource <> nil) and (DataSource.DataSet <> nil) then
493	>	for i := 0 to Params.Count - 1 do
494	>	if AddFieldToList(Params[i].Name, DataSource.DataSet, MasterFields) then
495	>	AddFieldToList(Params[i].Name, Self, DetailFields);
496	>	end;
497	>
498	>	function TIBQuery.GetStmtHandle: IStatement;
499	>	begin
500	>	Result := SelectStmtHandle;
501	>	end;
502	>
503	>	procedure TIBQuery.UpdateSQL;
504	>	begin
505	>	if not FSQLUpdating and not FInQueryChanged and (SQL.Text <> SelectSQL.Text) then
506	>	begin
507	>	FSQLUpdating := true;
508	>	try
509	>	SQL.Text := SelectSQL.Text;
510	>	finally
511	>	FSQLUpdating := false
512	>	end;
513	>	end;
514	>	end;
515	>
516	>	function TIBQuery.GenerateQueryForLiveUpdate : Boolean;
517	>	begin
518	>	Result := False;
519	>	end;
520	>
521	>	procedure TIBQuery.SetFiltered(Value: Boolean);
522	>	begin
523	>	if(Filtered <> Value) then
524	>	begin
525	>	inherited SetFiltered(value);
526	>	if Active then
527	>	begin
528	>	Close;
529	>	Open;
530	>	end;
531	>	end
532	>	else
533	>	inherited SetFiltered(value);
534	>	end;
535	>
536	>	procedure TIBQuery.SQLChanged(Sender: TObject);
537	>	begin
538	>	inherited SQLChanged(Sender);
539	>	UpdateSQL;
540	>	end;
541	>
542	>	procedure TIBQuery.SQLChanging(Sender: TObject);
543	>	begin
544	>	inherited SQLChanging(Sender);
545	>	Prepared := false;
546	>	end;
547	>
548	>	{ TIBQuery IProviderSupport }
549	>	(*
550	>	function TIBQuery.PSGetParams: TParams;
551	>	begin
552	>	Result := Params;
553	>	end;
554	>
555	>	procedure TIBQuery.PSSetParams(AParams: TParams);
556	>	begin
557	>	if AParams.Count <> 0 then
558	>	Params.Assign(AParams);
559	>	Close;
560	>	end;
561	>
562	>	function TIBQuery.PSGetTableName: string;
563	>	begin
564	>	Result := inherited PSGetTableName;
565	>	end;
566	>
567	>	procedure TIBQuery.PSExecute;
568	>	begin
569	>	ExecSQL;
570	>	end;
571	>
572	>	procedure TIBQuery.PSSetCommandText(const CommandText: string);
573	>	begin
574	>	if CommandText <> '' then
575	>	SQL.Text := CommandText;
576	>	end;
577	>	*)
578	>	end.
579	>

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