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

Comparing ibx/trunk/runtime/IBQuery.pas (file contents):
Revision 1 by tony, Mon Jul 31 16:43:00 2000 UTC vs.
Revision 21 by tony, Thu Feb 26 10:33:34 2015 UTC

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

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