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Comparing ibx/trunk/runtime/IBStoredProc.pas (file contents):
Revision 23 by tony, Fri Mar 13 10:26:52 2015 UTC vs.
Revision 39 by tony, Tue May 17 08:14:52 2016 UTC

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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 IBStoredProc;
35	<
36	<	{$Mode Delphi}
37	<
38	<	interface
39	<
40	<	uses SysUtils, Classes, DB, IB, IBDatabase, IBCustomDataSet,
41	<	IBHeader, IBSQL, IBUtils;
42	<
43	<	{ TIBStoredProc }
44	<	type
45	<
46	<	TIBStoredProc = class(TIBCustomDataSet)
47	<	private
48	<	FIBLoaded: Boolean;
49	<	FStmtHandle: TISC_STMT_HANDLE;
50	<	FProcName: string;
51	<	FParams: TParams;
52	<	FPrepared: Boolean;
53	<	FNameList: TStrings;
54	<	procedure SetParamsList(Value: TParams);
55	<	procedure FreeStatement;
56	<	function GetStoredProcedureNames: TStrings;
57	<	procedure GetStoredProcedureNamesFromServer;
58	<	procedure CreateParamDesc;
59	<	procedure SetParams;
60	<	procedure SetParamsFromCursor;
61	<	procedure GenerateSQL;
62	<	procedure FetchDataIntoOutputParams;
63	<	procedure ReadParamData(Reader: TReader);
64	<	procedure WriteParamData(Writer: TWriter);
65	<
66	<	protected
67	<
68	<	procedure DefineProperties(Filer: TFiler); override;
69	<	procedure SetFiltered(Value: Boolean); override;
70	<	procedure InitFieldDefs; override;
71	<	function GetParamsCount: Word;
72	<	procedure SetPrepared(Value: Boolean);
73	<	procedure SetPrepare(Value: Boolean);
74	<	procedure SetProcName(Value: string);
75	<	procedure Disconnect; override;
76	<	procedure InternalOpen; override;
77	<
78	<	public
79	<	constructor Create(AOwner: TComponent); override;
80	<	destructor Destroy; override;
81	<	procedure CopyParams(Value: TParams);
82	<	procedure ExecProc;
83	<	function ParamByName(const Value: string): TParam;
84	<	procedure Prepare;
85	<	procedure UnPrepare;
86	<	property ParamCount: Word read GetParamsCount;
87	<	property StmtHandle: TISC_STMT_HANDLE read FStmtHandle;
88	<	property Prepared: Boolean read FPrepared write SetPrepare;
89	<	property StoredProcedureNames: TStrings read GetStoredProcedureNames;
90	<
91	<	published
92	<	property StoredProcName: string read FProcName write SetProcName;
93	<	property Params: TParams read FParams write SetParamsList;
94	<	property Filtered;
95	<
96	<	property BeforeDatabaseDisconnect;
97	<	property AfterDatabaseDisconnect;
98	<	property DatabaseFree;
99	<	property BeforeTransactionEnd;
100	<	property AfterTransactionEnd;
101	<	property TransactionFree;
102	<	property OnFilterRecord;
103	<	end;
104	<
105	<	implementation
106	<
107	<	uses
108	<	IBIntf;
109	<
110	<	{ TIBStoredProc }
111	<
112	<	constructor TIBStoredProc.Create(AOwner: TComponent);
113	<	begin
114	<	inherited Create(AOwner);
115	<	FIBLoaded := False;
116	<	CheckIBLoaded;
117	<	FIBLoaded := True;
118	<	FParams := TParams.Create (self);
119	<	FNameList := TStringList.Create;
120	<	end;
121	<
122	<	destructor TIBStoredProc.Destroy;
123	<	begin
124	<	if FIBLoaded then
125	<	begin
126	<	Destroying;
127	<	Disconnect;
128	<	FParams.Free;
129	<	FNameList.Destroy;
130	<	end;
131	<	inherited Destroy;
132	<	end;
133	<
134	<	procedure TIBStoredProc.Disconnect;
135	<	begin
136	<	Close;
137	<	UnPrepare;
138	<	end;
139	<
140	<	procedure TIBStoredProc.ExecProc;
141	<	var
142	<	DidActivate: Boolean;
143	<	begin
144	<	CheckInActive;
145	<	if StoredProcName = '' then
146	<	IBError(ibxeNoStoredProcName, [nil]);
147	<	ActivateConnection;
148	<	DidActivate := ActivateTransaction;
149	<	try
150	<	SetPrepared(True);
151	<	if DataSource <> nil then SetParamsFromCursor;
152	<	if FParams.Count > 0 then SetParams;
153	<	InternalExecQuery;
154	<	FetchDataIntoOutputParams;
155	<	finally
156	<	if DidActivate then
157	<	DeactivateTransaction;
158	<	end;
159	<	end;
160	<
161	<	procedure TIBStoredProc.SetProcName(Value: string);
162	<	begin
163	<	if not (csReading in ComponentState) then
164	<	begin
165	<	CheckInactive;
166	<	if Value <> FProcName then
167	<	begin
168	<	FProcName := Value;
169	<	FreeStatement;
170	<	FParams.Clear;
171	<	if (Value <> '') and
172	<	(Database <> nil) then
173	<	GenerateSQL;
174	<	end;
175	<	end else begin
176	<	FProcName := Value;
177	<	if (Value <> '') and
178	<	(Database <> nil) then
179	<	GenerateSQL;
180	<	end;
181	<	end;
182	<
183	<	function TIBStoredProc.GetParamsCount: Word;
184	<	begin
185	<	Result := FParams.Count;
186	<	end;
187	<
188	<	procedure TIBStoredProc.SetFiltered(Value: Boolean);
189	<	begin
190	<	if(Filtered <> Value) then
191	<	begin
192	<	inherited SetFiltered(value);
193	<	if Active then
194	<	begin
195	<	Close;
196	<	Open;
197	<	end;
198	<	end
199	<	else
200	<	inherited SetFiltered(value);
201	<	end;
202	<
203	<	procedure TIBStoredProc.InitFieldDefs;
204	<	begin
205	<	if SelectSQL.Text = '' then
206	<	GenerateSQL;
207	<	inherited InitFieldDefs;
208	<	end;
209	<
210	<	procedure TIBStoredProc.GenerateSQL;
211	<
212	<	var Params: TStringList;
213	<
214	<	function FormatParameter(Dialect: Integer; Value: String): String;
215	<	var j: integer;
216	<	begin
217	<	Value := Trim(Value);
218	<	if Dialect = 1 then
219	<	Result := AnsiUpperCase(Value)
220	<	else
221	<	begin
222	<	j := 1;
223	<	Value := Space2Underscore(AnsiUpperCase(Value));
224	<	Result := Value;
225	<	while Params.IndexOf(Result) <> -1 do
226	<	begin
227	<	Result := Value + IntToStr(j);
228	<	Inc(j)
229	<	end;
230	<	Params.Add(Result)
231	<	end;
232	<	end;
233	<
234	<	var
235	<	Query : TIBSQL;
236	<	input : string;
237	<	begin
238	<	input := '';
239	<	if FProcName = '' then
240	<	IBError(ibxeNoStoredProcName,[nil]);
241	<	ActivateConnection;
242	<	Database.InternalTransaction.StartTransaction;
243	<	Params := TStringList.Create;
244	<	Query := TIBSQL.Create(self);
245	<	try
246	<	Query.Database := DataBase;
247	<	Query.Transaction := Database.InternalTransaction;
248	<	Query.SQL.Text := 'SELECT RDB$PARAMETER_NAME,  RDB$PARAMETER_TYPE ' + {do not localize}
249	<	'FROM RDB$PROCEDURE_PARAMETERS ' + {do not localize}
250	<	'WHERE RDB$PROCEDURE_NAME = ' + {do not localize}
251	<	'''' + FormatIdentifierValue(Database.SQLDialect, FProcName) + '''' +
252	<	' ORDER BY RDB$PARAMETER_NUMBER'; {do not localize}
253	<	Query.Prepare;
254	<	Query.GoToFirstRecordOnExecute := False;
255	<	Query.ExecQuery;
256	<	while (not Query.EOF) and (Query.Next <> nil) do begin
257	<	if (Query.Current.ByName('RDB$PARAMETER_TYPE').AsInteger = 0) then begin {do not localize}
258	<	if (input <> '') then
259	<	input := input + ', :' +
260	<	FormatParameter(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString) else {do not localize}
261	<	input := ':' +
262	<	FormatParameter(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString); {do not localize}
263	<	end
264	<	end;
265	<	SelectSQL.Text := 'Execute Procedure ' + {do not localize}
266	<	FormatParameter(Database.SQLDialect, FProcName) + ' ' + input;
267	<	{   writeln(SelectSQL.Text);}
268	<	finally
269	<	Query.Free;
270	<	Params.Free;
271	<	Database.InternalTransaction.Commit;
272	<	end;
273	<	end;
274	<
275	<	procedure TIBStoredProc.CreateParamDesc;
276	<	var
277	<	i : integer;
278	<	DataType : TFieldType;
279	<	begin
280	<	DataType := ftUnknown;
281	<	for i := 0 to QSelect.Current.Count - 1 do begin
282	<	case QSelect.Fields[i].SQLtype of
283	<	SQL_TYPE_DATE: DataType := ftDate;
284	<	SQL_TYPE_TIME: DataType := ftTime;
285	<	SQL_TIMESTAMP: DataType := ftDateTime;
286	<	SQL_SHORT:
287	<	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
288	<	DataType := ftSmallInt
289	<	else
290	<	DataType := ftBCD;
291	<	SQL_LONG:
292	<	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
293	<	DataType := ftInteger
294	<	else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
295	<	DataType := ftBCD
296	<	else
297	<	DataType := ftFloat;
298	<	SQL_INT64:
299	<	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
300	<	DataType := ftLargeInt
301	<	else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
302	<	DataType := ftBCD
303	<	else
304	<	DataType := ftFloat;
305	<	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
306	<	SQL_BOOLEAN:
307	<	DataType := ftBoolean;
308	<	SQL_TEXT: DataType := ftString;
309	<	SQL_VARYING:
310	<	if ((QSelect.Fields[i].AsXSQLVar)^.sqllen < 1024) then
311	<	DataType := ftString
312	<	else DataType := ftBlob;
313	<	SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
314	<	end;
315	<	FParams.CreateParam(DataType, Trim(QSelect.Fields[i].Name), ptOutput);
316	<	end;
317	<
318	<	DataType := ftUnknown;
319	<	for i := 0 to QSelect.Params.Count - 1 do begin
320	<	case QSelect.Params[i].SQLtype of
321	<	SQL_TYPE_DATE: DataType := ftDate;
322	<	SQL_TYPE_TIME: DataType := ftTime;
323	<	SQL_TIMESTAMP: DataType := ftDateTime;
324	<	SQL_SHORT:
325	<	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
326	<	DataType := ftSmallInt
327	<	else
328	<	DataType := ftBCD;
329	<	SQL_LONG:
330	<	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
331	<	DataType := ftInteger
332	<	else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
333	<	DataType := ftBCD
334	<	else DataType := ftFloat;
335	<	SQL_INT64:
336	<	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
337	<	DataType := ftLargeInt
338	<	else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
339	<	DataType := ftBCD
340	<	else DataType := ftFloat;
341	<	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
342	<	SQL_BOOLEAN:
343	<	DataType := ftBoolean;
344	<	SQL_TEXT: DataType := ftString;
345	<	SQL_VARYING:
346	<	if ((QSelect.Params[i].AsXSQLVar)^.sqllen < 1024) then
347	<	DataType := ftString
348	<	else DataType := ftBlob;
349	<	SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
350	<	end;
351	<	FParams.CreateParam(DataType, Trim(QSelect.Params[i].Name), ptInput);
352	<	end;
353	<	end;
354	<
355	<	procedure TIBStoredProc.SetPrepared(Value: Boolean);
356	<	begin
357	<	if Prepared <> Value then
358	<	begin
359	<	if Value then
360	<	try
361	<	if SelectSQL.Text = '' then GenerateSQL;
362	<	InternalPrepare;
363	<	if FParams.Count = 0 then CreateParamDesc;
364	<	FPrepared := True;
365	<	except
366	<	FreeStatement;
367	<	raise;
368	<	end
369	<	else FreeStatement;
370	<	end;
371	<
372	<	end;
373	<
374	<	procedure TIBStoredProc.Prepare;
375	<	begin
376	<	SetPrepared(True);
377	<	end;
378	<
379	<	procedure TIBStoredProc.UnPrepare;
380	<	begin
381	<	SetPrepared(False);
382	<	end;
383	<
384	<	procedure TIBStoredProc.FreeStatement;
385	<	begin
386	<	InternalUnPrepare;
387	<	FPrepared := False;
388	<	end;
389	<
390	<	procedure TIBStoredProc.SetPrepare(Value: Boolean);
391	<	begin
392	<	if Value then Prepare
393	<	else UnPrepare;
394	<	end;
395	<
396	<	procedure TIBStoredProc.CopyParams(Value: TParams);
397	<	begin
398	<	if not Prepared and (FParams.Count = 0) then
399	<	try
400	<	Prepare;
401	<	Value.Assign(FParams);
402	<	finally
403	<	UnPrepare;
404	<	end else
405	<	Value.Assign(FParams);
406	<	end;
407	<
408	<	procedure TIBStoredProc.SetParamsList(Value: TParams);
409	<	begin
410	<	CheckInactive;
411	<	if Prepared then
412	<	begin
413	<	SetPrepared(False);
414	<	FParams.Assign(Value);
415	<	SetPrepared(True);
416	<	end else
417	<	FParams.Assign(Value);
418	<	end;
419	<
420	<	function TIBStoredProc.ParamByName(const Value: string): TParam;
421	<	begin
422	<	Result := FParams.ParamByName(Value);
423	<	end;
424	<
425	<	function TIBStoredProc.GetStoredProcedureNames: TStrings;
426	<	begin
427	<	FNameList.clear;
428	<	GetStoredProcedureNamesFromServer;
429	<	Result := FNameList;
430	<	end;
431	<
432	<	procedure TIBStoredProc.GetStoredProcedureNamesFromServer;
433	<	var
434	<	Query : TIBSQL;
435	<	begin
436	<	if not (csReading in ComponentState) then begin
437	<	ActivateConnection;
438	<	Database.InternalTransaction.StartTransaction;
439	<	Query := TIBSQL.Create(self);
440	<	try
441	<	Query.GoToFirstRecordOnExecute := False;
442	<	Query.Database := DataBase;
443	<	Query.Transaction := Database.InternalTransaction;
444	<	Query.SQL.Text := 'Select RDB$PROCEDURE_NAME from RDB$PROCEDURES'; {do not localize}
445	<	Query.Prepare;
446	<	Query.ExecQuery;
447	<	while (not Query.EOF) and (Query.Next <> nil) do
448	<	FNameList.Add(TrimRight(Query.Current.ByName('RDB$PROCEDURE_NAME').AsString)); {do not localize}
449	<	finally
450	<	Query.Free;
451	<	Database.InternalTransaction.Commit;
452	<	end;
453	<	end;
454	<	end;
455	<
456	<	procedure TIBStoredProc.SetParams;
457	<	var
458	<	i : integer;
459	<	j: integer;
460	<	begin
461	<	i := 0;
462	<	for j := 0 to FParams.Count - 1 do
463	<	begin
464	<	if (Params[j].ParamType <> ptInput) then
465	<	continue;
466	<	if not Params[j].Bound then
467	<	IBError(ibxeRequiredParamNotSet, [nil]);
468	<	if Params[j].IsNull then
469	<	SQLParams[i].IsNull := True
470	<	else begin
471	<	SQLParams[i].IsNull := False;
472	<	case Params[j].DataType of
473	<	ftString:
474	<	SQLParams[i].AsString := Params[j].AsString;
475	<	ftSmallint, ftWord:
476	<	SQLParams[i].AsShort := Params[j].AsSmallInt;
477	<	ftBoolean:
478	<	SQLParams[i].AsBoolean := Params[j].AsBoolean;
479	<	ftInteger:
480	<	SQLParams[i].AsLong := Params[j].AsInteger;
481	<	ftLargeInt:
482	<	SQLParams[i].AsInt64 := Params[j].AsLargeInt;
483	<	ftFloat, ftCurrency:
484	<	SQLParams[i].AsDouble := Params[j].AsFloat;
485	<	ftBCD:
486	<	SQLParams[i].AsCurrency := Params[j].AsCurrency;
487	<	ftDate:
488	<	SQLParams[i].AsDate := Params[j].AsDateTime;
489	<	ftTime:
490	<	SQLParams[i].AsTime := Params[j].AsDateTime;
491	<	ftDateTime:
492	<	SQLParams[i].AsDateTime := Params[j].AsDateTime;
493	<	ftBlob, ftMemo:
494	<	SQLParams[i].AsString := Params[j].AsString;
495	<	else
496	<	IBError(ibxeNotSupported, [nil]);
497	<	end;
498	<	end;
499	<	Inc(i);
500	<	end;
501	<	end;
502	<
503	<	procedure TIBStoredProc.SetParamsFromCursor;
504	<	var
505	<	I: Integer;
506	<	DataSet: TDataSet;
507	<	begin
508	<	if DataSource <> nil then
509	<	begin
510	<	DataSet := DataSource.DataSet;
511	<	if DataSet <> nil then
512	<	begin
513	<	DataSet.FieldDefs.Update;
514	<	for I := 0 to FParams.Count - 1 do
515	<	with FParams[I] do
516	<	if (not Bound) and
517	<	((ParamType = ptInput) or (ParamType =  ptInputOutput)) then
518	<	AssignField(DataSet.FieldByName(Name));
519	<	end;
520	<	end;
521	<	end;
522	<
523	<	procedure TIBStoredProc.FetchDataIntoOutputParams;
524	<	var
525	<	i,j : Integer;
526	<	begin
527	<	j := 0;
528	<	for i := 0 to FParams.Count - 1 do
529	<	with Params[I] do
530	<	if ParamType = ptOutput then begin
531	<	Value := QSelect.Fields[j].Value;
532	<	Inc(j);
533	<	end;
534	<	end;
535	<
536	<	procedure TIBStoredProc.InternalOpen;
537	<	begin
538	<	IBError(ibxeIsAExecuteProcedure,[nil]);
539	<	end;
540	<
541	<	procedure TIBStoredProc.DefineProperties(Filer: TFiler);
542	<
543	<	function WriteData: Boolean;
544	<	begin
545	<	if Filer.Ancestor <> nil then
546	<	Result := not FParams.IsEqual(TIBStoredProc(Filer.Ancestor).FParams) else
547	<	Result := FParams.Count > 0;
548	<	end;
549	<
550	<	begin
551	<	inherited DefineProperties(Filer);
552	<	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
553	<	end;
554	<
555	<	procedure TIBStoredProc.WriteParamData(Writer: TWriter);
556	<	begin
557	<	Writer.WriteCollection(Params);
558	<	end;
559	<
560	<	procedure TIBStoredProc.ReadParamData(Reader: TReader);
561	<	begin
562	<	Reader.ReadValue;
563	<	Reader.ReadCollection(Params);
564	<	end;
565	<
566	<	end.
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 IBStoredProc;
35	>
36	>	{$Mode Delphi}
37	>
38	>	{$IF FPC_FULLVERSION >= 20700 }
39	>	{$codepage UTF8}
40	>	{$ENDIF}
41	>
42	>	interface
43	>
44	>	uses SysUtils, Classes, DB, IB, IBDatabase, IBCustomDataSet,
45	>	IBHeader, IBSQL, IBUtils;
46	>
47	>	{ TIBStoredProc }
48	>	type
49	>
50	>	TIBStoredProc = class(TIBCustomDataSet)
51	>	private
52	>	FIBLoaded: Boolean;
53	>	FStmtHandle: TISC_STMT_HANDLE;
54	>	FProcName: string;
55	>	FParams: TParams;
56	>	FPrepared: Boolean;
57	>	FNameList: TStrings;
58	>	procedure SetParamsList(Value: TParams);
59	>	procedure FreeStatement;
60	>	function GetStoredProcedureNames: TStrings;
61	>	procedure GetStoredProcedureNamesFromServer;
62	>	procedure CreateParamDesc;
63	>	procedure SetParams;
64	>	procedure SetParamsFromCursor;
65	>	procedure GenerateSQL;
66	>	procedure FetchDataIntoOutputParams;
67	>	procedure ReadParamData(Reader: TReader);
68	>	procedure WriteParamData(Writer: TWriter);
69	>
70	>	protected
71	>
72	>	procedure DefineProperties(Filer: TFiler); override;
73	>	procedure SetFiltered(Value: Boolean); override;
74	>	procedure InitFieldDefs; override;
75	>	function GetParamsCount: Word;
76	>	procedure SetPrepared(Value: Boolean);
77	>	procedure SetPrepare(Value: Boolean);
78	>	procedure SetProcName(Value: string);
79	>	procedure Disconnect; override;
80	>	procedure InternalOpen; override;
81	>
82	>	public
83	>	constructor Create(AOwner: TComponent); override;
84	>	destructor Destroy; override;
85	>	procedure CopyParams(Value: TParams);
86	>	procedure ExecProc;
87	>	function ParamByName(const Value: string): TParam;
88	>	procedure Prepare;
89	>	procedure UnPrepare;
90	>	property ParamCount: Word read GetParamsCount;
91	>	property StmtHandle: TISC_STMT_HANDLE read FStmtHandle;
92	>	property Prepared: Boolean read FPrepared write SetPrepare;
93	>	property StoredProcedureNames: TStrings read GetStoredProcedureNames;
94	>
95	>	published
96	>	property StoredProcName: string read FProcName write SetProcName;
97	>	property Params: TParams read FParams write SetParamsList;
98	>	property Filtered;
99	>
100	>	property BeforeDatabaseDisconnect;
101	>	property AfterDatabaseDisconnect;
102	>	property DatabaseFree;
103	>	property BeforeTransactionEnd;
104	>	property AfterTransactionEnd;
105	>	property TransactionFree;
106	>	property OnFilterRecord;
107	>	end;
108	>
109	>	implementation
110	>
111	>	uses
112	>	IBIntf;
113	>
114	>	{ TIBStoredProc }
115	>
116	>	constructor TIBStoredProc.Create(AOwner: TComponent);
117	>	begin
118	>	inherited Create(AOwner);
119	>	FIBLoaded := False;
120	>	CheckIBLoaded;
121	>	FIBLoaded := True;
122	>	FParams := TParams.Create (self);
123	>	FNameList := TStringList.Create;
124	>	end;
125	>
126	>	destructor TIBStoredProc.Destroy;
127	>	begin
128	>	if FIBLoaded then
129	>	begin
130	>	Destroying;
131	>	Disconnect;
132	>	FParams.Free;
133	>	FNameList.Destroy;
134	>	end;
135	>	inherited Destroy;
136	>	end;
137	>
138	>	procedure TIBStoredProc.Disconnect;
139	>	begin
140	>	Close;
141	>	UnPrepare;
142	>	end;
143	>
144	>	procedure TIBStoredProc.ExecProc;
145	>	var
146	>	DidActivate: Boolean;
147	>	begin
148	>	CheckInActive;
149	>	if StoredProcName = '' then
150	>	IBError(ibxeNoStoredProcName, [nil]);
151	>	ActivateConnection;
152	>	DidActivate := ActivateTransaction;
153	>	try
154	>	SetPrepared(True);
155	>	if DataSource <> nil then SetParamsFromCursor;
156	>	if FParams.Count > 0 then SetParams;
157	>	InternalExecQuery;
158	>	FetchDataIntoOutputParams;
159	>	finally
160	>	if DidActivate then
161	>	DeactivateTransaction;
162	>	end;
163	>	end;
164	>
165	>	procedure TIBStoredProc.SetProcName(Value: string);
166	>	begin
167	>	if not (csReading in ComponentState) then
168	>	begin
169	>	CheckInactive;
170	>	if Value <> FProcName then
171	>	begin
172	>	FProcName := Value;
173	>	FreeStatement;
174	>	FParams.Clear;
175	>	if (Value <> '') and
176	>	(Database <> nil) then
177	>	GenerateSQL;
178	>	end;
179	>	end else begin
180	>	FProcName := Value;
181	>	if (Value <> '') and
182	>	(Database <> nil) then
183	>	GenerateSQL;
184	>	end;
185	>	end;
186	>
187	>	function TIBStoredProc.GetParamsCount: Word;
188	>	begin
189	>	Result := FParams.Count;
190	>	end;
191	>
192	>	procedure TIBStoredProc.SetFiltered(Value: Boolean);
193	>	begin
194	>	if(Filtered <> Value) then
195	>	begin
196	>	inherited SetFiltered(value);
197	>	if Active then
198	>	begin
199	>	Close;
200	>	Open;
201	>	end;
202	>	end
203	>	else
204	>	inherited SetFiltered(value);
205	>	end;
206	>
207	>	procedure TIBStoredProc.InitFieldDefs;
208	>	begin
209	>	if SelectSQL.Text = '' then
210	>	GenerateSQL;
211	>	inherited InitFieldDefs;
212	>	end;
213	>
214	>	procedure TIBStoredProc.GenerateSQL;
215	>
216	>	var Params: TStringList;
217	>
218	>	function FormatParameter(Dialect: Integer; Value: String): String;
219	>	var j: integer;
220	>	begin
221	>	Value := Trim(Value);
222	>	if Dialect = 1 then
223	>	Result := AnsiUpperCase(Value)
224	>	else
225	>	begin
226	>	j := 1;
227	>	Value := Space2Underscore(AnsiUpperCase(Value));
228	>	Result := Value;
229	>	while Params.IndexOf(Result) <> -1 do
230	>	begin
231	>	Result := Value + IntToStr(j);
232	>	Inc(j)
233	>	end;
234	>	Params.Add(Result)
235	>	end;
236	>	end;
237	>
238	>	var
239	>	Query : TIBSQL;
240	>	input : string;
241	>	begin
242	>	input := '';
243	>	if FProcName = '' then
244	>	IBError(ibxeNoStoredProcName,[nil]);
245	>	ActivateConnection;
246	>	Database.InternalTransaction.StartTransaction;
247	>	Params := TStringList.Create;
248	>	Query := TIBSQL.Create(self);
249	>	try
250	>	Query.Database := DataBase;
251	>	Query.Transaction := Database.InternalTransaction;
252	>	Query.SQL.Text := 'SELECT RDB$PARAMETER_NAME,  RDB$PARAMETER_TYPE ' + {do not localize}
253	>	'FROM RDB$PROCEDURE_PARAMETERS ' + {do not localize}
254	>	'WHERE RDB$PROCEDURE_NAME = ' + {do not localize}
255	>	'''' + FormatIdentifierValue(Database.SQLDialect, FProcName) + '''' +
256	>	' ORDER BY RDB$PARAMETER_NUMBER'; {do not localize}
257	>	Query.Prepare;
258	>	Query.GoToFirstRecordOnExecute := False;
259	>	Query.ExecQuery;
260	>	while (not Query.EOF) and (Query.Next <> nil) do begin
261	>	if (Query.Current.ByName('RDB$PARAMETER_TYPE').AsInteger = 0) then begin {do not localize}
262	>	if (input <> '') then
263	>	input := input + ', :' +
264	>	FormatParameter(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString) else {do not localize}
265	>	input := ':' +
266	>	FormatParameter(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString); {do not localize}
267	>	end
268	>	end;
269	>	SelectSQL.Text := 'Execute Procedure ' + {do not localize}
270	>	FormatParameter(Database.SQLDialect, FProcName) + ' ' + input;
271	>	{   writeln(SelectSQL.Text);}
272	>	finally
273	>	Query.Free;
274	>	Params.Free;
275	>	Database.InternalTransaction.Commit;
276	>	end;
277	>	end;
278	>
279	>	procedure TIBStoredProc.CreateParamDesc;
280	>	var
281	>	i : integer;
282	>	DataType : TFieldType;
283	>	begin
284	>	DataType := ftUnknown;
285	>	for i := 0 to QSelect.Current.Count - 1 do begin
286	>	case QSelect.Fields[i].SQLtype of
287	>	SQL_TYPE_DATE: DataType := ftDate;
288	>	SQL_TYPE_TIME: DataType := ftTime;
289	>	SQL_TIMESTAMP: DataType := ftDateTime;
290	>	SQL_SHORT:
291	>	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
292	>	DataType := ftSmallInt
293	>	else
294	>	DataType := ftBCD;
295	>	SQL_LONG:
296	>	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
297	>	DataType := ftInteger
298	>	else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
299	>	DataType := ftBCD
300	>	else
301	>	DataType := ftFloat;
302	>	SQL_INT64:
303	>	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
304	>	DataType := ftLargeInt
305	>	else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
306	>	DataType := ftBCD
307	>	else
308	>	DataType := ftFloat;
309	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
310	>	SQL_BOOLEAN:
311	>	DataType := ftBoolean;
312	>	SQL_TEXT: DataType := ftString;
313	>	SQL_VARYING:
314	>	if ((QSelect.Fields[i].AsXSQLVar)^.sqllen < 1024) then
315	>	DataType := ftString
316	>	else DataType := ftBlob;
317	>	SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
318	>	end;
319	>	FParams.CreateParam(DataType, Trim(QSelect.Fields[i].Name), ptOutput);
320	>	end;
321	>
322	>	DataType := ftUnknown;
323	>	for i := 0 to QSelect.Params.Count - 1 do begin
324	>	case QSelect.Params[i].SQLtype of
325	>	SQL_TYPE_DATE: DataType := ftDate;
326	>	SQL_TYPE_TIME: DataType := ftTime;
327	>	SQL_TIMESTAMP: DataType := ftDateTime;
328	>	SQL_SHORT:
329	>	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
330	>	DataType := ftSmallInt
331	>	else
332	>	DataType := ftBCD;
333	>	SQL_LONG:
334	>	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
335	>	DataType := ftInteger
336	>	else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
337	>	DataType := ftBCD
338	>	else DataType := ftFloat;
339	>	SQL_INT64:
340	>	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
341	>	DataType := ftLargeInt
342	>	else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
343	>	DataType := ftBCD
344	>	else DataType := ftFloat;
345	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
346	>	SQL_BOOLEAN:
347	>	DataType := ftBoolean;
348	>	SQL_TEXT: DataType := ftString;
349	>	SQL_VARYING:
350	>	if ((QSelect.Params[i].AsXSQLVar)^.sqllen < 1024) then
351	>	DataType := ftString
352	>	else DataType := ftBlob;
353	>	SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
354	>	end;
355	>	FParams.CreateParam(DataType, Trim(QSelect.Params[i].Name), ptInput);
356	>	end;
357	>	end;
358	>
359	>	procedure TIBStoredProc.SetPrepared(Value: Boolean);
360	>	begin
361	>	if Prepared <> Value then
362	>	begin
363	>	if Value then
364	>	try
365	>	if SelectSQL.Text = '' then GenerateSQL;
366	>	InternalPrepare;
367	>	if FParams.Count = 0 then CreateParamDesc;
368	>	FPrepared := True;
369	>	except
370	>	FreeStatement;
371	>	raise;
372	>	end
373	>	else FreeStatement;
374	>	end;
375	>
376	>	end;
377	>
378	>	procedure TIBStoredProc.Prepare;
379	>	begin
380	>	SetPrepared(True);
381	>	end;
382	>
383	>	procedure TIBStoredProc.UnPrepare;
384	>	begin
385	>	SetPrepared(False);
386	>	end;
387	>
388	>	procedure TIBStoredProc.FreeStatement;
389	>	begin
390	>	InternalUnPrepare;
391	>	FPrepared := False;
392	>	end;
393	>
394	>	procedure TIBStoredProc.SetPrepare(Value: Boolean);
395	>	begin
396	>	if Value then Prepare
397	>	else UnPrepare;
398	>	end;
399	>
400	>	procedure TIBStoredProc.CopyParams(Value: TParams);
401	>	begin
402	>	if not Prepared and (FParams.Count = 0) then
403	>	try
404	>	Prepare;
405	>	Value.Assign(FParams);
406	>	finally
407	>	UnPrepare;
408	>	end else
409	>	Value.Assign(FParams);
410	>	end;
411	>
412	>	procedure TIBStoredProc.SetParamsList(Value: TParams);
413	>	begin
414	>	CheckInactive;
415	>	if Prepared then
416	>	begin
417	>	SetPrepared(False);
418	>	FParams.Assign(Value);
419	>	SetPrepared(True);
420	>	end else
421	>	FParams.Assign(Value);
422	>	end;
423	>
424	>	function TIBStoredProc.ParamByName(const Value: string): TParam;
425	>	begin
426	>	Prepare;
427	>	Result := FParams.ParamByName(Value);
428	>	end;
429	>
430	>	function TIBStoredProc.GetStoredProcedureNames: TStrings;
431	>	begin
432	>	FNameList.clear;
433	>	GetStoredProcedureNamesFromServer;
434	>	Result := FNameList;
435	>	end;
436	>
437	>	procedure TIBStoredProc.GetStoredProcedureNamesFromServer;
438	>	var
439	>	Query : TIBSQL;
440	>	begin
441	>	if not (csReading in ComponentState) then begin
442	>	ActivateConnection;
443	>	Database.InternalTransaction.StartTransaction;
444	>	Query := TIBSQL.Create(self);
445	>	try
446	>	Query.GoToFirstRecordOnExecute := False;
447	>	Query.Database := DataBase;
448	>	Query.Transaction := Database.InternalTransaction;
449	>	Query.SQL.Text := 'Select RDB$PROCEDURE_NAME from RDB$PROCEDURES'; {do not localize}
450	>	Query.Prepare;
451	>	Query.ExecQuery;
452	>	while (not Query.EOF) and (Query.Next <> nil) do
453	>	FNameList.Add(TrimRight(Query.Current.ByName('RDB$PROCEDURE_NAME').AsString)); {do not localize}
454	>	finally
455	>	Query.Free;
456	>	Database.InternalTransaction.Commit;
457	>	end;
458	>	end;
459	>	end;
460	>
461	>	procedure TIBStoredProc.SetParams;
462	>	var
463	>	i : integer;
464	>	j: integer;
465	>	begin
466	>	i := 0;
467	>	for j := 0 to FParams.Count - 1 do
468	>	begin
469	>	if (Params[j].ParamType <> ptInput) then
470	>	continue;
471	>	if not Params[j].Bound then
472	>	IBError(ibxeRequiredParamNotSet, [Params[j].Name]);
473	>	if Params[j].IsNull then
474	>	SQLParams[i].IsNull := True
475	>	else begin
476	>	SQLParams[i].IsNull := False;
477	>	case Params[j].DataType of
478	>	ftString:
479	>	SQLParams[i].AsString := Params[j].AsString;
480	>	ftSmallint, ftWord:
481	>	SQLParams[i].AsShort := Params[j].AsSmallInt;
482	>	ftBoolean:
483	>	SQLParams[i].AsBoolean := Params[j].AsBoolean;
484	>	ftInteger:
485	>	SQLParams[i].AsLong := Params[j].AsInteger;
486	>	ftLargeInt:
487	>	SQLParams[i].AsInt64 := Params[j].AsLargeInt;
488	>	ftFloat, ftCurrency:
489	>	SQLParams[i].AsDouble := Params[j].AsFloat;
490	>	ftBCD:
491	>	SQLParams[i].AsCurrency := Params[j].AsCurrency;
492	>	ftDate:
493	>	SQLParams[i].AsDate := Params[j].AsDateTime;
494	>	ftTime:
495	>	SQLParams[i].AsTime := Params[j].AsDateTime;
496	>	ftDateTime:
497	>	SQLParams[i].AsDateTime := Params[j].AsDateTime;
498	>	ftBlob, ftMemo:
499	>	SQLParams[i].AsString := Params[j].AsString;
500	>	else
501	>	IBError(ibxeNotSupported, [nil]);
502	>	end;
503	>	end;
504	>	Inc(i);
505	>	end;
506	>	end;
507	>
508	>	procedure TIBStoredProc.SetParamsFromCursor;
509	>	var
510	>	I: Integer;
511	>	DataSet: TDataSet;
512	>	begin
513	>	if DataSource <> nil then
514	>	begin
515	>	DataSet := DataSource.DataSet;
516	>	if DataSet <> nil then
517	>	begin
518	>	DataSet.FieldDefs.Update;
519	>	for I := 0 to FParams.Count - 1 do
520	>	with FParams[I] do
521	>	if (not Bound) and
522	>	((ParamType = ptInput) or (ParamType =  ptInputOutput)) then
523	>	AssignField(DataSet.FieldByName(Name));
524	>	end;
525	>	end;
526	>	end;
527	>
528	>	procedure TIBStoredProc.FetchDataIntoOutputParams;
529	>	var
530	>	i,j : Integer;
531	>	begin
532	>	j := 0;
533	>	for i := 0 to FParams.Count - 1 do
534	>	with Params[I] do
535	>	if ParamType = ptOutput then begin
536	>	Value := QSelect.Fields[j].Value;
537	>	Inc(j);
538	>	end;
539	>	end;
540	>
541	>	procedure TIBStoredProc.InternalOpen;
542	>	begin
543	>	IBError(ibxeIsAExecuteProcedure,[nil]);
544	>	end;
545	>
546	>	procedure TIBStoredProc.DefineProperties(Filer: TFiler);
547	>
548	>	function WriteData: Boolean;
549	>	begin
550	>	if Filer.Ancestor <> nil then
551	>	Result := not FParams.IsEqual(TIBStoredProc(Filer.Ancestor).FParams) else
552	>	Result := FParams.Count > 0;
553	>	end;
554	>
555	>	begin
556	>	inherited DefineProperties(Filer);
557	>	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
558	>	end;
559	>
560	>	procedure TIBStoredProc.WriteParamData(Writer: TWriter);
561	>	begin
562	>	Writer.WriteCollection(Params);
563	>	end;
564	>
565	>	procedure TIBStoredProc.ReadParamData(Reader: TReader);
566	>	begin
567	>	Reader.ReadValue;
568	>	Reader.ReadCollection(Params);
569	>	end;
570	>
571	>	end.

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