trunk/runtime/IBStoredProc.pas

{************************************************************************}
{                                                                        }
{       Borland Delphi Visual Component Library                          }
{       InterBase Express core components                                }
{                                                                        }
{       Copyright (c) 1998-2000 Inprise Corporation                      }
{                                                                        }
{    InterBase Express is based in part on the product                   }
{    Free IB Components, written by Gregory H. Deatz for                 }
{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
{    Free IB Components is used under license.                           }
{                                                                        }
{    The contents of this file are subject to the InterBase              }
{    Public License Version 1.0 (the "License"); you may not             }
{    use this file except in compliance with the License. You            }
{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
{    Software distributed under the License is distributed on            }
{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
{    express or implied. See the License for the specific language       }
{    governing rights and limitations under the License.                 }
{    The Original Code was created by InterBase Software Corporation     }
{       and its successors.                                              }
{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
{       Corporation. All Rights Reserved.                                }
{    Contributor(s): Jeff Overcash                                       }
{                                                                        }
{    IBX For Lazarus (Firebird Express)                                  }
{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
{    Portions created by MWA Software are copyright McCallum Whyman      }
{    Associates Ltd 2011                                                 }
{                                                                        }
{************************************************************************}

unit IBStoredProc;

{$Mode Delphi}

{$codepage UTF8}

interface

uses SysUtils, Classes, DB, IB, IBDatabase, IBCustomDataSet,
     IBSQL, IBUtils;
     
{ TIBStoredProc }
type

  TIBStoredProc = class(TIBCustomDataSet)
  private
    FStmtHandle: IStatement;
    FProcName: string;
    FParams: TParams;
    FPrepared: Boolean;
    FNameList: TStrings;
    procedure SetParamsList(Value: TParams);
    procedure FreeStatement;
    function GetStoredProcedureNames: TStrings;
    procedure GetStoredProcedureNamesFromServer;
    procedure CreateParamDesc;
    procedure SetParams;
    procedure SetParamsFromCursor;
    procedure GenerateSQL;
    procedure FetchDataIntoOutputParams;
    procedure ReadParamData(Reader: TReader);
    procedure WriteParamData(Writer: TWriter);

  protected

    procedure DefineProperties(Filer: TFiler); override;
    procedure SetFiltered(Value: Boolean); override;
    procedure InitFieldDefs; override;
    function GetParamsCount: Word;
    procedure SetPrepared(Value: Boolean);
    procedure SetPrepare(Value: Boolean);
    procedure SetProcName(Value: string);
    procedure Disconnect; override;
    procedure InternalOpen; override;

  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure CopyParams(Value: TParams);
    procedure ExecProc;
    function ParamByName(const Value: string): TParam;
    procedure Prepare;
    procedure UnPrepare;
    property ParamCount: Word read GetParamsCount;
    property StmtHandle: IStatement read FStmtHandle;
    property Prepared: Boolean read FPrepared write SetPrepare;
    property StoredProcedureNames: TStrings read GetStoredProcedureNames;

  published
    property StoredProcName: string read FProcName write SetProcName;
    property Params: TParams read FParams write SetParamsList;
    property Filtered;

    property BeforeDatabaseDisconnect;
    property AfterDatabaseDisconnect;
    property DatabaseFree;
    property BeforeTransactionEnd;
    property AfterTransactionEnd;
    property TransactionFree;
    property OnFilterRecord;
  end;

implementation

 uses  FBMessages;

{ TIBStoredProc }

constructor TIBStoredProc.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FParams := TParams.Create (self);
  FNameList := TStringList.Create;
end;

destructor TIBStoredProc.Destroy;
begin
  Destroying;
  Disconnect;
  if assigned (FParams) then FParams.Free;
  if assigned(FNameList) then FNameList.Destroy;
  inherited Destroy;
end;

procedure TIBStoredProc.Disconnect;
begin
  Close;
  UnPrepare;
end;

procedure TIBStoredProc.ExecProc;
var
  DidActivate: Boolean;
begin
  CheckInActive;
  if StoredProcName = '' then
    IBError(ibxeNoStoredProcName, [nil]);
  ActivateConnection;
  DidActivate := ActivateTransaction;
  try
    SetPrepared(True);
    if DataSource <> nil then SetParamsFromCursor;
    if FParams.Count > 0 then SetParams;
    InternalExecQuery;
    FetchDataIntoOutputParams;
  finally
    if DidActivate then
      DeactivateTransaction;
  end;
end;

procedure TIBStoredProc.SetProcName(Value: string);
begin
  if not (csReading in ComponentState) then
  begin
    CheckInactive;
    if Value <> FProcName then
    begin
      FProcName := Value;
      FreeStatement;
      FParams.Clear;
      if (Value <> '') and
        (Database <> nil) then
        GenerateSQL;
    end;
  end else begin
    FProcName := Value;
  if (Value <> '') and
    (Database <> nil) then
    GenerateSQL;
  end;
end;

function TIBStoredProc.GetParamsCount: Word;
begin
  Result := FParams.Count;
end;

procedure TIBStoredProc.SetFiltered(Value: Boolean);
begin
  if(Filtered <> Value) then
  begin
    inherited SetFiltered(value);
    if Active then
    begin
      Close;
      Open;
    end;
  end
  else
    inherited SetFiltered(value);
end;

 procedure TIBStoredProc.InitFieldDefs;
begin
  if SelectSQL.Text = '' then
     GenerateSQL;
  inherited InitFieldDefs;
end;

procedure TIBStoredProc.GenerateSQL;

var Params: TStringList;

  function FormatParameter(Dialect: Integer; Value: String): String;
  var j: integer;
  begin
    Value := Trim(Value);
    if Dialect = 1 then
       Result := AnsiUpperCase(Value)
    else
    begin
      j := 1;
      Value := Space2Underscore(AnsiUpperCase(Value));
      Result := Value;
      while Params.IndexOf(Result) <> -1 do
      begin
        Result := Value + IntToStr(j);
        Inc(j)
      end;
      Params.Add(Result)
    end;
  end;

var
  Query : TIBSQL;
  input : string;
begin
  input := '';
  if FProcName = '' then
     IBError(ibxeNoStoredProcName,[nil]);
  ActivateConnection;
  Database.InternalTransaction.StartTransaction;
  Params := TStringList.Create;
  Query := TIBSQL.Create(self);
  try
    Query.Database := DataBase;
    Query.Transaction := Database.InternalTransaction;
    Query.SQL.Text := 'SELECT RDB$PARAMETER_NAME,  RDB$PARAMETER_TYPE ' + {do not localize}
                       'FROM RDB$PROCEDURE_PARAMETERS ' + {do not localize}
                       'WHERE RDB$PROCEDURE_NAME = ' + {do not localize}
                       '''' + FormatIdentifierValue(Database.SQLDialect, FProcName) + '''' +
                       ' ORDER BY RDB$PARAMETER_NUMBER'; {do not localize}
    Query.Prepare;
    Query.GoToFirstRecordOnExecute := False;
    Query.ExecQuery;
    while (not Query.EOF) and Query.Next do begin
      if (Query.FieldByName('RDB$PARAMETER_TYPE').AsInteger = 0) then begin {do not localize}
        if (input <> '') then
          input := input + ', :' +
            FormatParameter(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString) else {do not localize}
          input := ':' +
            FormatParameter(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString); {do not localize}
      end
    end;
    SelectSQL.Text := 'Execute Procedure ' + {do not localize}
                FormatParameter(Database.SQLDialect, FProcName) + ' ' + input;
 {   writeln(SelectSQL.Text);}
  finally
    Query.Free;
    Params.Free;
    Database.InternalTransaction.Commit;
  end;
end;

procedure TIBStoredProc.CreateParamDesc;
var
  i : integer;
  DataType : TFieldType;
begin
  DataType := ftUnknown;
  for i := 0 to QSelect.MetaData.Count - 1 do begin
  case QSelect.MetaData[i].SQLtype of
    SQL_TYPE_DATE: DataType := ftDate;
    SQL_TYPE_TIME: DataType := ftTime;
    SQL_TIMESTAMP: DataType := ftDateTime;
    SQL_SHORT:
      if QSelect.MetaData[i].getScale = 0 then
        DataType := ftSmallInt
      else
        DataType := ftBCD;
    SQL_LONG:
      if QSelect.MetaData[i].getScale = 0 then
        DataType := ftInteger
      else if QSelect.MetaData[i].getScale >= -4 then
        DataType := ftBCD
      else
        DataType := ftFloat;
    SQL_INT64:
      if QSelect.MetaData[i].getScale = 0 then
        DataType := ftLargeInt
      else if QSelect.MetaData[i].getScale >= -4 then
        DataType := ftBCD
      else
        DataType := ftFloat;
    SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
    SQL_BOOLEAN:
      DataType := ftBoolean;
    SQL_TEXT: DataType := ftString;
    SQL_VARYING:
      if QSelect.MetaData[i].GetSize < 1024 then
        DataType := ftString
      else DataType := ftBlob;
    SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
    end;
    FParams.CreateParam(DataType, Trim(QSelect.MetaData[i].Name), ptOutput);
  end;

  DataType := ftUnknown;
  for i := 0 to QSelect.Params.Count - 1 do begin
  case QSelect.Params[i].GetSQLtype of
    SQL_TYPE_DATE: DataType := ftDate;
    SQL_TYPE_TIME: DataType := ftTime;
    SQL_TIMESTAMP: DataType := ftDateTime;
    SQL_SHORT:
      if QSelect.Params[i].getScale = 0 then
        DataType := ftSmallInt
      else
        DataType := ftBCD;
    SQL_LONG:
      if QSelect.Params[i].getScale = 0 then
        DataType := ftInteger
      else if QSelect.Params[i].getScale >= -4 then
        DataType := ftBCD
      else DataType := ftFloat;
    SQL_INT64:
      if QSelect.Params[i].getScale = 0 then
        DataType := ftLargeInt
      else if QSelect.Params[i].getScale >= -4 then
        DataType := ftBCD
      else DataType := ftFloat;
    SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
    SQL_BOOLEAN:
      DataType := ftBoolean;
    SQL_TEXT: DataType := ftString;
    SQL_VARYING:
      if QSelect.Params[i].GetSize < 1024 then
        DataType := ftString
      else DataType := ftBlob;
    SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
    end;
    FParams.CreateParam(DataType, Trim(QSelect.Params[i].Name), ptInput);
  end;
end;

procedure TIBStoredProc.SetPrepared(Value: Boolean);
begin
  if Prepared <> Value then
  begin
    if Value then
      try
        if SelectSQL.Text = '' then GenerateSQL;
        InternalPrepare;
        if FParams.Count = 0 then CreateParamDesc;
        FPrepared := True;
      except
        FreeStatement;
        raise;
      end
    else FreeStatement;
  end;

end;

procedure TIBStoredProc.Prepare;
begin
  SetPrepared(True);
end;

procedure TIBStoredProc.UnPrepare;
begin
  SetPrepared(False);
end;

procedure TIBStoredProc.FreeStatement;
begin
  InternalUnPrepare;
  FPrepared := False;
end;

procedure TIBStoredProc.SetPrepare(Value: Boolean);
begin
  if Value then Prepare
  else UnPrepare;
end;

procedure TIBStoredProc.CopyParams(Value: TParams);
begin
  if not Prepared and (FParams.Count = 0) then
  try
    Prepare;
    Value.Assign(FParams);
  finally
    UnPrepare;
  end else
    Value.Assign(FParams);
end;

procedure TIBStoredProc.SetParamsList(Value: TParams);
begin
  CheckInactive;
  if Prepared then
  begin
    SetPrepared(False);
    FParams.Assign(Value);
    SetPrepared(True);
  end else
    FParams.Assign(Value);
end;

function TIBStoredProc.ParamByName(const Value: string): TParam;
begin
  Prepare;
  Result := FParams.ParamByName(Value);
end;

function TIBStoredProc.GetStoredProcedureNames: TStrings;
begin
  FNameList.clear;
  GetStoredProcedureNamesFromServer;
  Result := FNameList;
end;

procedure TIBStoredProc.GetStoredProcedureNamesFromServer;
var
  Query : TIBSQL;
begin
  if not (csReading in ComponentState) then begin
    ActivateConnection;
    Database.InternalTransaction.StartTransaction;
    Query := TIBSQL.Create(self);
    try
      Query.GoToFirstRecordOnExecute := False;
      Query.Database := DataBase;
      Query.Transaction := Database.InternalTransaction;
      Query.SQL.Text := 'Select RDB$PROCEDURE_NAME from RDB$PROCEDURES'; {do not localize}
      Query.Prepare;
      Query.ExecQuery;
      while (not Query.EOF) and Query.Next do
        FNameList.Add(TrimRight(Query.Current.ByName('RDB$PROCEDURE_NAME').AsString)); {do not localize}
    finally
      Query.Free;
      Database.InternalTransaction.Commit;
    end;
  end;
end;

procedure TIBStoredProc.SetParams;
var
i : integer;
j: integer;
begin
  i := 0;
  for j := 0 to FParams.Count - 1 do
  begin
    if (Params[j].ParamType <> ptInput) then
      continue;
    if not Params[j].Bound then
      IBError(ibxeRequiredParamNotSet, [Params[j].Name]);
    if Params[j].IsNull then
      SQLParams[i].IsNull := True
    else begin
      SQLParams[i].IsNull := False;
      case Params[j].DataType of
        ftString:
          SQLParams[i].AsString := Params[j].AsString;
        ftSmallint, ftWord:
          SQLParams[i].AsShort := Params[j].AsSmallInt;
        ftBoolean:
           SQLParams[i].AsBoolean := Params[j].AsBoolean;
        ftInteger:
          SQLParams[i].AsLong := Params[j].AsInteger;
        ftLargeInt:
          SQLParams[i].AsInt64 := Params[j].AsLargeInt;
        ftFloat, ftCurrency:
         SQLParams[i].AsDouble := Params[j].AsFloat;
        ftBCD:
          SQLParams[i].AsCurrency := Params[j].AsCurrency;
        ftDate:
          SQLParams[i].AsDate := Params[j].AsDateTime;
        ftTime:
          SQLParams[i].AsTime := Params[j].AsDateTime;
        ftDateTime:
          SQLParams[i].AsDateTime := Params[j].AsDateTime;
        ftBlob, ftMemo:
          SQLParams[i].AsString := Params[j].AsString;
        else
          IBError(ibxeNotSupported, [nil]);
      end;
    end;
    Inc(i);
  end;
end;

procedure TIBStoredProc.SetParamsFromCursor;
var
  I: Integer;
  DataSet: TDataSet;
begin
  if DataSource <> nil then
  begin
    DataSet := DataSource.DataSet;
    if DataSet <> nil then
    begin
      DataSet.FieldDefs.Update;
      for I := 0 to FParams.Count - 1 do
        with FParams[I] do
          if (not Bound) and
            ((ParamType = ptInput) or (ParamType =  ptInputOutput)) then
            AssignField(DataSet.FieldByName(Name));
    end;
  end;
end;

procedure TIBStoredProc.FetchDataIntoOutputParams;
var
i,j : Integer;
begin
  j := 0;
  for i := 0 to FParams.Count - 1 do
    with Params[I] do
      if ParamType = ptOutput then begin
         Value := QSelect.Fields[j].Value;
         Inc(j);
      end;
end;

procedure TIBStoredProc.InternalOpen;
begin
  IBError(ibxeIsAExecuteProcedure,[nil]);
end;

procedure TIBStoredProc.DefineProperties(Filer: TFiler);

  function WriteData: Boolean;
  begin
    if Filer.Ancestor <> nil then
      Result := not FParams.IsEqual(TIBStoredProc(Filer.Ancestor).FParams) else
      Result := FParams.Count > 0;
  end;

begin
  inherited DefineProperties(Filer);
  Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
end;

procedure TIBStoredProc.WriteParamData(Writer: TWriter);
begin
  Writer.WriteCollection(Params);
end;

procedure TIBStoredProc.ReadParamData(Reader: TReader);
begin
  Reader.ReadValue;
  Reader.ReadCollection(Params);
end;

end.
Revision:	45
Committed:	Tue Dec 6 10:33:46 2016 UTC (7 years, 11 months ago) by tony
Content type:	text/x-pascal
File size:	15990 byte(s)
Log Message:	Committing updates for Release R2-0-0
#	Content
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.