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

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