ViewVC Help

View File | Revision Log | Show Annotations | Download File | View Changeset | Root Listing

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

Comparing ibx/trunk/runtime/IBQuery.pas (file contents):
Revision 31 by tony, Tue Jul 14 15:31:25 2015 UTC vs.
Revision 33 by tony, Sat Jul 18 12:30:52 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	<	{    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,
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	>

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines