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

Comparing ibx/trunk/runtime/IBStoredProc.pas (file contents):
Revision 27 by tony, Tue Apr 14 13:10:23 2015 UTC vs.
Revision 45 by tony, Tue Dec 6 10:33:46 2016 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 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	<	Prepare;
423	<	Result := FParams.ParamByName(Value);
424	<	end;
425	<
426	<	function TIBStoredProc.GetStoredProcedureNames: TStrings;
427	<	begin
428	<	FNameList.clear;
429	<	GetStoredProcedureNamesFromServer;
430	<	Result := FNameList;
431	<	end;
432	<
433	<	procedure TIBStoredProc.GetStoredProcedureNamesFromServer;
434	<	var
435	<	Query : TIBSQL;
436	<	begin
437	<	if not (csReading in ComponentState) then begin
438	<	ActivateConnection;
439	<	Database.InternalTransaction.StartTransaction;
440	<	Query := TIBSQL.Create(self);
441	<	try
442	<	Query.GoToFirstRecordOnExecute := False;
443	<	Query.Database := DataBase;
444	<	Query.Transaction := Database.InternalTransaction;
445	<	Query.SQL.Text := 'Select RDB$PROCEDURE_NAME from RDB$PROCEDURES'; {do not localize}
446	<	Query.Prepare;
447	<	Query.ExecQuery;
448	<	while (not Query.EOF) and (Query.Next <> nil) do
449	<	FNameList.Add(TrimRight(Query.Current.ByName('RDB$PROCEDURE_NAME').AsString)); {do not localize}
450	<	finally
451	<	Query.Free;
452	<	Database.InternalTransaction.Commit;
453	<	end;
454	<	end;
455	<	end;
456	<
457	<	procedure TIBStoredProc.SetParams;
458	<	var
459	<	i : integer;
460	<	j: integer;
461	<	begin
462	<	i := 0;
463	<	for j := 0 to FParams.Count - 1 do
464	<	begin
465	<	if (Params[j].ParamType <> ptInput) then
466	<	continue;
467	<	if not Params[j].Bound then
468	<	IBError(ibxeRequiredParamNotSet, [Params[j].Name]);
469	<	if Params[j].IsNull then
470	<	SQLParams[i].IsNull := True
471	<	else begin
472	<	SQLParams[i].IsNull := False;
473	<	case Params[j].DataType of
474	<	ftString:
475	<	SQLParams[i].AsString := Params[j].AsString;
476	<	ftSmallint, ftWord:
477	<	SQLParams[i].AsShort := Params[j].AsSmallInt;
478	<	ftBoolean:
479	<	SQLParams[i].AsBoolean := Params[j].AsBoolean;
480	<	ftInteger:
481	<	SQLParams[i].AsLong := Params[j].AsInteger;
482	<	ftLargeInt:
483	<	SQLParams[i].AsInt64 := Params[j].AsLargeInt;
484	<	ftFloat, ftCurrency:
485	<	SQLParams[i].AsDouble := Params[j].AsFloat;
486	<	ftBCD:
487	<	SQLParams[i].AsCurrency := Params[j].AsCurrency;
488	<	ftDate:
489	<	SQLParams[i].AsDate := Params[j].AsDateTime;
490	<	ftTime:
491	<	SQLParams[i].AsTime := Params[j].AsDateTime;
492	<	ftDateTime:
493	<	SQLParams[i].AsDateTime := Params[j].AsDateTime;
494	<	ftBlob, ftMemo:
495	<	SQLParams[i].AsString := Params[j].AsString;
496	<	else
497	<	IBError(ibxeNotSupported, [nil]);
498	<	end;
499	<	end;
500	<	Inc(i);
501	<	end;
502	<	end;
503	<
504	<	procedure TIBStoredProc.SetParamsFromCursor;
505	<	var
506	<	I: Integer;
507	<	DataSet: TDataSet;
508	<	begin
509	<	if DataSource <> nil then
510	<	begin
511	<	DataSet := DataSource.DataSet;
512	<	if DataSet <> nil then
513	<	begin
514	<	DataSet.FieldDefs.Update;
515	<	for I := 0 to FParams.Count - 1 do
516	<	with FParams[I] do
517	<	if (not Bound) and
518	<	((ParamType = ptInput) or (ParamType =  ptInputOutput)) then
519	<	AssignField(DataSet.FieldByName(Name));
520	<	end;
521	<	end;
522	<	end;
523	<
524	<	procedure TIBStoredProc.FetchDataIntoOutputParams;
525	<	var
526	<	i,j : Integer;
527	<	begin
528	<	j := 0;
529	<	for i := 0 to FParams.Count - 1 do
530	<	with Params[I] do
531	<	if ParamType = ptOutput then begin
532	<	Value := QSelect.Fields[j].Value;
533	<	Inc(j);
534	<	end;
535	<	end;
536	<
537	<	procedure TIBStoredProc.InternalOpen;
538	<	begin
539	<	IBError(ibxeIsAExecuteProcedure,[nil]);
540	<	end;
541	<
542	<	procedure TIBStoredProc.DefineProperties(Filer: TFiler);
543	<
544	<	function WriteData: Boolean;
545	<	begin
546	<	if Filer.Ancestor <> nil then
547	<	Result := not FParams.IsEqual(TIBStoredProc(Filer.Ancestor).FParams) else
548	<	Result := FParams.Count > 0;
549	<	end;
550	<
551	<	begin
552	<	inherited DefineProperties(Filer);
553	<	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
554	<	end;
555	<
556	<	procedure TIBStoredProc.WriteParamData(Writer: TWriter);
557	<	begin
558	<	Writer.WriteCollection(Params);
559	<	end;
560	<
561	<	procedure TIBStoredProc.ReadParamData(Reader: TReader);
562	<	begin
563	<	Reader.ReadValue;
564	<	Reader.ReadCollection(Params);
565	<	end;
566	<
567	<	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	>	{$Mode Delphi}
37	>
38	>	{$codepage UTF8}
39	>
40	>	interface
41	>
42	>	uses SysUtils, Classes, DB, IB, IBDatabase, IBCustomDataSet,
43	>	IBSQL, IBUtils;
44	>
45	>	{ TIBStoredProc }
46	>	type
47	>
48	>	TIBStoredProc = class(TIBCustomDataSet)
49	>	private
50	>	FStmtHandle: IStatement;
51	>	FProcName: string;
52	>	FParams: TParams;
53	>	FPrepared: Boolean;
54	>	FNameList: TStrings;
55	>	procedure SetParamsList(Value: TParams);
56	>	procedure FreeStatement;
57	>	function GetStoredProcedureNames: TStrings;
58	>	procedure GetStoredProcedureNamesFromServer;
59	>	procedure CreateParamDesc;
60	>	procedure SetParams;
61	>	procedure SetParamsFromCursor;
62	>	procedure GenerateSQL;
63	>	procedure FetchDataIntoOutputParams;
64	>	procedure ReadParamData(Reader: TReader);
65	>	procedure WriteParamData(Writer: TWriter);
66	>
67	>	protected
68	>
69	>	procedure DefineProperties(Filer: TFiler); override;
70	>	procedure SetFiltered(Value: Boolean); override;
71	>	procedure InitFieldDefs; override;
72	>	function GetParamsCount: Word;
73	>	procedure SetPrepared(Value: Boolean);
74	>	procedure SetPrepare(Value: Boolean);
75	>	procedure SetProcName(Value: string);
76	>	procedure Disconnect; override;
77	>	procedure InternalOpen; override;
78	>
79	>	public
80	>	constructor Create(AOwner: TComponent); override;
81	>	destructor Destroy; override;
82	>	procedure CopyParams(Value: TParams);
83	>	procedure ExecProc;
84	>	function ParamByName(const Value: string): TParam;
85	>	procedure Prepare;
86	>	procedure UnPrepare;
87	>	property ParamCount: Word read GetParamsCount;
88	>	property StmtHandle: IStatement read FStmtHandle;
89	>	property Prepared: Boolean read FPrepared write SetPrepare;
90	>	property StoredProcedureNames: TStrings read GetStoredProcedureNames;
91	>
92	>	published
93	>	property StoredProcName: string read FProcName write SetProcName;
94	>	property Params: TParams read FParams write SetParamsList;
95	>	property Filtered;
96	>
97	>	property BeforeDatabaseDisconnect;
98	>	property AfterDatabaseDisconnect;
99	>	property DatabaseFree;
100	>	property BeforeTransactionEnd;
101	>	property AfterTransactionEnd;
102	>	property TransactionFree;
103	>	property OnFilterRecord;
104	>	end;
105	>
106	>	implementation
107	>
108	>	uses  FBMessages;
109	>
110	>	{ TIBStoredProc }
111	>
112	>	constructor TIBStoredProc.Create(AOwner: TComponent);
113	>	begin
114	>	inherited Create(AOwner);
115	>	FParams := TParams.Create (self);
116	>	FNameList := TStringList.Create;
117	>	end;
118	>
119	>	destructor TIBStoredProc.Destroy;
120	>	begin
121	>	Destroying;
122	>	Disconnect;
123	>	if assigned (FParams) then FParams.Free;
124	>	if assigned(FNameList) then FNameList.Destroy;
125	>	inherited Destroy;
126	>	end;
127	>
128	>	procedure TIBStoredProc.Disconnect;
129	>	begin
130	>	Close;
131	>	UnPrepare;
132	>	end;
133	>
134	>	procedure TIBStoredProc.ExecProc;
135	>	var
136	>	DidActivate: Boolean;
137	>	begin
138	>	CheckInActive;
139	>	if StoredProcName = '' then
140	>	IBError(ibxeNoStoredProcName, [nil]);
141	>	ActivateConnection;
142	>	DidActivate := ActivateTransaction;
143	>	try
144	>	SetPrepared(True);
145	>	if DataSource <> nil then SetParamsFromCursor;
146	>	if FParams.Count > 0 then SetParams;
147	>	InternalExecQuery;
148	>	FetchDataIntoOutputParams;
149	>	finally
150	>	if DidActivate then
151	>	DeactivateTransaction;
152	>	end;
153	>	end;
154	>
155	>	procedure TIBStoredProc.SetProcName(Value: string);
156	>	begin
157	>	if not (csReading in ComponentState) then
158	>	begin
159	>	CheckInactive;
160	>	if Value <> FProcName then
161	>	begin
162	>	FProcName := Value;
163	>	FreeStatement;
164	>	FParams.Clear;
165	>	if (Value <> '') and
166	>	(Database <> nil) then
167	>	GenerateSQL;
168	>	end;
169	>	end else begin
170	>	FProcName := Value;
171	>	if (Value <> '') and
172	>	(Database <> nil) then
173	>	GenerateSQL;
174	>	end;
175	>	end;
176	>
177	>	function TIBStoredProc.GetParamsCount: Word;
178	>	begin
179	>	Result := FParams.Count;
180	>	end;
181	>
182	>	procedure TIBStoredProc.SetFiltered(Value: Boolean);
183	>	begin
184	>	if(Filtered <> Value) then
185	>	begin
186	>	inherited SetFiltered(value);
187	>	if Active then
188	>	begin
189	>	Close;
190	>	Open;
191	>	end;
192	>	end
193	>	else
194	>	inherited SetFiltered(value);
195	>	end;
196	>
197	>	procedure TIBStoredProc.InitFieldDefs;
198	>	begin
199	>	if SelectSQL.Text = '' then
200	>	GenerateSQL;
201	>	inherited InitFieldDefs;
202	>	end;
203	>
204	>	procedure TIBStoredProc.GenerateSQL;
205	>
206	>	var Params: TStringList;
207	>
208	>	function FormatParameter(Dialect: Integer; Value: String): String;
209	>	var j: integer;
210	>	begin
211	>	Value := Trim(Value);
212	>	if Dialect = 1 then
213	>	Result := AnsiUpperCase(Value)
214	>	else
215	>	begin
216	>	j := 1;
217	>	Value := Space2Underscore(AnsiUpperCase(Value));
218	>	Result := Value;
219	>	while Params.IndexOf(Result) <> -1 do
220	>	begin
221	>	Result := Value + IntToStr(j);
222	>	Inc(j)
223	>	end;
224	>	Params.Add(Result)
225	>	end;
226	>	end;
227	>
228	>	var
229	>	Query : TIBSQL;
230	>	input : string;
231	>	begin
232	>	input := '';
233	>	if FProcName = '' then
234	>	IBError(ibxeNoStoredProcName,[nil]);
235	>	ActivateConnection;
236	>	Database.InternalTransaction.StartTransaction;
237	>	Params := TStringList.Create;
238	>	Query := TIBSQL.Create(self);
239	>	try
240	>	Query.Database := DataBase;
241	>	Query.Transaction := Database.InternalTransaction;
242	>	Query.SQL.Text := 'SELECT RDB$PARAMETER_NAME,  RDB$PARAMETER_TYPE ' + {do not localize}
243	>	'FROM RDB$PROCEDURE_PARAMETERS ' + {do not localize}
244	>	'WHERE RDB$PROCEDURE_NAME = ' + {do not localize}
245	>	'''' + FormatIdentifierValue(Database.SQLDialect, FProcName) + '''' +
246	>	' ORDER BY RDB$PARAMETER_NUMBER'; {do not localize}
247	>	Query.Prepare;
248	>	Query.GoToFirstRecordOnExecute := False;
249	>	Query.ExecQuery;
250	>	while (not Query.EOF) and Query.Next do begin
251	>	if (Query.FieldByName('RDB$PARAMETER_TYPE').AsInteger = 0) then begin {do not localize}
252	>	if (input <> '') then
253	>	input := input + ', :' +
254	>	FormatParameter(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString) else {do not localize}
255	>	input := ':' +
256	>	FormatParameter(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString); {do not localize}
257	>	end
258	>	end;
259	>	SelectSQL.Text := 'Execute Procedure ' + {do not localize}
260	>	FormatParameter(Database.SQLDialect, FProcName) + ' ' + input;
261	>	{   writeln(SelectSQL.Text);}
262	>	finally
263	>	Query.Free;
264	>	Params.Free;
265	>	Database.InternalTransaction.Commit;
266	>	end;
267	>	end;
268	>
269	>	procedure TIBStoredProc.CreateParamDesc;
270	>	var
271	>	i : integer;
272	>	DataType : TFieldType;
273	>	begin
274	>	DataType := ftUnknown;
275	>	for i := 0 to QSelect.MetaData.Count - 1 do begin
276	>	case QSelect.MetaData[i].SQLtype of
277	>	SQL_TYPE_DATE: DataType := ftDate;
278	>	SQL_TYPE_TIME: DataType := ftTime;
279	>	SQL_TIMESTAMP: DataType := ftDateTime;
280	>	SQL_SHORT:
281	>	if QSelect.MetaData[i].getScale = 0 then
282	>	DataType := ftSmallInt
283	>	else
284	>	DataType := ftBCD;
285	>	SQL_LONG:
286	>	if QSelect.MetaData[i].getScale = 0 then
287	>	DataType := ftInteger
288	>	else if QSelect.MetaData[i].getScale >= -4 then
289	>	DataType := ftBCD
290	>	else
291	>	DataType := ftFloat;
292	>	SQL_INT64:
293	>	if QSelect.MetaData[i].getScale = 0 then
294	>	DataType := ftLargeInt
295	>	else if QSelect.MetaData[i].getScale >= -4 then
296	>	DataType := ftBCD
297	>	else
298	>	DataType := ftFloat;
299	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
300	>	SQL_BOOLEAN:
301	>	DataType := ftBoolean;
302	>	SQL_TEXT: DataType := ftString;
303	>	SQL_VARYING:
304	>	if QSelect.MetaData[i].GetSize < 1024 then
305	>	DataType := ftString
306	>	else DataType := ftBlob;
307	>	SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
308	>	end;
309	>	FParams.CreateParam(DataType, Trim(QSelect.MetaData[i].Name), ptOutput);
310	>	end;
311	>
312	>	DataType := ftUnknown;
313	>	for i := 0 to QSelect.Params.Count - 1 do begin
314	>	case QSelect.Params[i].GetSQLtype of
315	>	SQL_TYPE_DATE: DataType := ftDate;
316	>	SQL_TYPE_TIME: DataType := ftTime;
317	>	SQL_TIMESTAMP: DataType := ftDateTime;
318	>	SQL_SHORT:
319	>	if QSelect.Params[i].getScale = 0 then
320	>	DataType := ftSmallInt
321	>	else
322	>	DataType := ftBCD;
323	>	SQL_LONG:
324	>	if QSelect.Params[i].getScale = 0 then
325	>	DataType := ftInteger
326	>	else if QSelect.Params[i].getScale >= -4 then
327	>	DataType := ftBCD
328	>	else DataType := ftFloat;
329	>	SQL_INT64:
330	>	if QSelect.Params[i].getScale = 0 then
331	>	DataType := ftLargeInt
332	>	else if QSelect.Params[i].getScale >= -4 then
333	>	DataType := ftBCD
334	>	else DataType := ftFloat;
335	>	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
336	>	SQL_BOOLEAN:
337	>	DataType := ftBoolean;
338	>	SQL_TEXT: DataType := ftString;
339	>	SQL_VARYING:
340	>	if QSelect.Params[i].GetSize < 1024 then
341	>	DataType := ftString
342	>	else DataType := ftBlob;
343	>	SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
344	>	end;
345	>	FParams.CreateParam(DataType, Trim(QSelect.Params[i].Name), ptInput);
346	>	end;
347	>	end;
348	>
349	>	procedure TIBStoredProc.SetPrepared(Value: Boolean);
350	>	begin
351	>	if Prepared <> Value then
352	>	begin
353	>	if Value then
354	>	try
355	>	if SelectSQL.Text = '' then GenerateSQL;
356	>	InternalPrepare;
357	>	if FParams.Count = 0 then CreateParamDesc;
358	>	FPrepared := True;
359	>	except
360	>	FreeStatement;
361	>	raise;
362	>	end
363	>	else FreeStatement;
364	>	end;
365	>
366	>	end;
367	>
368	>	procedure TIBStoredProc.Prepare;
369	>	begin
370	>	SetPrepared(True);
371	>	end;
372	>
373	>	procedure TIBStoredProc.UnPrepare;
374	>	begin
375	>	SetPrepared(False);
376	>	end;
377	>
378	>	procedure TIBStoredProc.FreeStatement;
379	>	begin
380	>	InternalUnPrepare;
381	>	FPrepared := False;
382	>	end;
383	>
384	>	procedure TIBStoredProc.SetPrepare(Value: Boolean);
385	>	begin
386	>	if Value then Prepare
387	>	else UnPrepare;
388	>	end;
389	>
390	>	procedure TIBStoredProc.CopyParams(Value: TParams);
391	>	begin
392	>	if not Prepared and (FParams.Count = 0) then
393	>	try
394	>	Prepare;
395	>	Value.Assign(FParams);
396	>	finally
397	>	UnPrepare;
398	>	end else
399	>	Value.Assign(FParams);
400	>	end;
401	>
402	>	procedure TIBStoredProc.SetParamsList(Value: TParams);
403	>	begin
404	>	CheckInactive;
405	>	if Prepared then
406	>	begin
407	>	SetPrepared(False);
408	>	FParams.Assign(Value);
409	>	SetPrepared(True);
410	>	end else
411	>	FParams.Assign(Value);
412	>	end;
413	>
414	>	function TIBStoredProc.ParamByName(const Value: string): TParam;
415	>	begin
416	>	Prepare;
417	>	Result := FParams.ParamByName(Value);
418	>	end;
419	>
420	>	function TIBStoredProc.GetStoredProcedureNames: TStrings;
421	>	begin
422	>	FNameList.clear;
423	>	GetStoredProcedureNamesFromServer;
424	>	Result := FNameList;
425	>	end;
426	>
427	>	procedure TIBStoredProc.GetStoredProcedureNamesFromServer;
428	>	var
429	>	Query : TIBSQL;
430	>	begin
431	>	if not (csReading in ComponentState) then begin
432	>	ActivateConnection;
433	>	Database.InternalTransaction.StartTransaction;
434	>	Query := TIBSQL.Create(self);
435	>	try
436	>	Query.GoToFirstRecordOnExecute := False;
437	>	Query.Database := DataBase;
438	>	Query.Transaction := Database.InternalTransaction;
439	>	Query.SQL.Text := 'Select RDB$PROCEDURE_NAME from RDB$PROCEDURES'; {do not localize}
440	>	Query.Prepare;
441	>	Query.ExecQuery;
442	>	while (not Query.EOF) and Query.Next do
443	>	FNameList.Add(TrimRight(Query.Current.ByName('RDB$PROCEDURE_NAME').AsString)); {do not localize}
444	>	finally
445	>	Query.Free;
446	>	Database.InternalTransaction.Commit;
447	>	end;
448	>	end;
449	>	end;
450	>
451	>	procedure TIBStoredProc.SetParams;
452	>	var
453	>	i : integer;
454	>	j: integer;
455	>	begin
456	>	i := 0;
457	>	for j := 0 to FParams.Count - 1 do
458	>	begin
459	>	if (Params[j].ParamType <> ptInput) then
460	>	continue;
461	>	if not Params[j].Bound then
462	>	IBError(ibxeRequiredParamNotSet, [Params[j].Name]);
463	>	if Params[j].IsNull then
464	>	SQLParams[i].IsNull := True
465	>	else begin
466	>	SQLParams[i].IsNull := False;
467	>	case Params[j].DataType of
468	>	ftString:
469	>	SQLParams[i].AsString := Params[j].AsString;
470	>	ftSmallint, ftWord:
471	>	SQLParams[i].AsShort := Params[j].AsSmallInt;
472	>	ftBoolean:
473	>	SQLParams[i].AsBoolean := Params[j].AsBoolean;
474	>	ftInteger:
475	>	SQLParams[i].AsLong := Params[j].AsInteger;
476	>	ftLargeInt:
477	>	SQLParams[i].AsInt64 := Params[j].AsLargeInt;
478	>	ftFloat, ftCurrency:
479	>	SQLParams[i].AsDouble := Params[j].AsFloat;
480	>	ftBCD:
481	>	SQLParams[i].AsCurrency := Params[j].AsCurrency;
482	>	ftDate:
483	>	SQLParams[i].AsDate := Params[j].AsDateTime;
484	>	ftTime:
485	>	SQLParams[i].AsTime := Params[j].AsDateTime;
486	>	ftDateTime:
487	>	SQLParams[i].AsDateTime := Params[j].AsDateTime;
488	>	ftBlob, ftMemo:
489	>	SQLParams[i].AsString := Params[j].AsString;
490	>	else
491	>	IBError(ibxeNotSupported, [nil]);
492	>	end;
493	>	end;
494	>	Inc(i);
495	>	end;
496	>	end;
497	>
498	>	procedure TIBStoredProc.SetParamsFromCursor;
499	>	var
500	>	I: Integer;
501	>	DataSet: TDataSet;
502	>	begin
503	>	if DataSource <> nil then
504	>	begin
505	>	DataSet := DataSource.DataSet;
506	>	if DataSet <> nil then
507	>	begin
508	>	DataSet.FieldDefs.Update;
509	>	for I := 0 to FParams.Count - 1 do
510	>	with FParams[I] do
511	>	if (not Bound) and
512	>	((ParamType = ptInput) or (ParamType =  ptInputOutput)) then
513	>	AssignField(DataSet.FieldByName(Name));
514	>	end;
515	>	end;
516	>	end;
517	>
518	>	procedure TIBStoredProc.FetchDataIntoOutputParams;
519	>	var
520	>	i,j : Integer;
521	>	begin
522	>	j := 0;
523	>	for i := 0 to FParams.Count - 1 do
524	>	with Params[I] do
525	>	if ParamType = ptOutput then begin
526	>	Value := QSelect.Fields[j].Value;
527	>	Inc(j);
528	>	end;
529	>	end;
530	>
531	>	procedure TIBStoredProc.InternalOpen;
532	>	begin
533	>	IBError(ibxeIsAExecuteProcedure,[nil]);
534	>	end;
535	>
536	>	procedure TIBStoredProc.DefineProperties(Filer: TFiler);
537	>
538	>	function WriteData: Boolean;
539	>	begin
540	>	if Filer.Ancestor <> nil then
541	>	Result := not FParams.IsEqual(TIBStoredProc(Filer.Ancestor).FParams) else
542	>	Result := FParams.Count > 0;
543	>	end;
544	>
545	>	begin
546	>	inherited DefineProperties(Filer);
547	>	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
548	>	end;
549	>
550	>	procedure TIBStoredProc.WriteParamData(Writer: TWriter);
551	>	begin
552	>	Writer.WriteCollection(Params);
553	>	end;
554	>
555	>	procedure TIBStoredProc.ReadParamData(Reader: TReader);
556	>	begin
557	>	Reader.ReadValue;
558	>	Reader.ReadCollection(Params);
559	>	end;
560	>
561	>	end.

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