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}

interface

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

  TIBStoredProc = class(TIBCustomDataSet)
  private
    FIBLoaded: Boolean;
    FStmtHandle: TISC_STMT_HANDLE;
    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;
    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: TISC_STMT_HANDLE 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
   IBIntf;

{ TIBStoredProc }

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

destructor TIBStoredProc.Destroy;
begin
  if FIBLoaded then
  begin
    Destroying;
    Disconnect;
    FParams.Free;
    FNameList.Destroy;
  end;
  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.GenerateSQL;
var
  Query : TIBSQL;
  input : string;
begin
  ActivateConnection;
  Database.InternalTransaction.StartTransaction;
  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$PARAMETER_NUMBER'; {do not localize}
    Query.Prepare;
    Query.GoToFirstRecordOnExecute := False;
    Query.ExecQuery;
    while (not Query.EOF) and (Query.Next <> nil) do begin
      if (Query.Current.ByName('RDB$PARAMETER_TYPE').AsInteger = 0) then begin {do not localize}
        if (input <> '') then
          input := input + ', :' +
            FormatIdentifier(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString) else {do not localize}
          input := ':' +
            FormatIdentifier(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString); {do not localize}
      end
    end;
    SelectSQL.Text := 'Execute Procedure ' + {do not localize}
                FormatIdentifier(Database.SQLDialect, FProcName) + ' ' + input;
  finally
    Query.Free;
    Database.InternalTransaction.Commit;
  end;
end;

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

  DataType := ftUnknown;
  for i := 0 to QSelect.Params.Count - 1 do begin
  case QSelect.Params[i].SQLtype of
    SQL_TYPE_DATE: DataType := ftDate;
    SQL_TYPE_TIME: DataType := ftTime;
    SQL_TIMESTAMP: DataType := ftDateTime;
    SQL_SHORT:
      if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
        DataType := ftSmallInt
      else
        DataType := ftBCD;
    SQL_LONG:
      if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
        DataType := ftInteger
      else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
        DataType := ftBCD
      else DataType := ftFloat;
    SQL_INT64:
      if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
        DataType := ftLargeInt
      else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
        DataType := ftBCD
      else DataType := ftFloat;
    SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
    SQL_TEXT: DataType := ftString;
    SQL_VARYING:
      if ((QSelect.Params[i].AsXSQLVar)^.sqllen < 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
  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 <> nil) 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, [nil]);
    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;
        ftBoolean, ftSmallint, ftWord:
          SQLParams[i].AsShort := Params[j].AsSmallInt;
        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:	7
Committed:	Sun Aug 5 18:28:19 2012 UTC (12 years, 3 months ago) by tony
Content type:	text/x-pascal
File size:	15265 byte(s)
Log Message:	Committing updates for Release R1-0-0
#	User	Rev	Content
1	tony	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	tony	7	{ 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	tony	1	{************************************************************************}
33
34			unit IBStoredProc;
35
36	tony	5	{$Mode Delphi}
37
38	tony	1	interface
39
40	tony	5	uses SysUtils, Classes, DB, IB, IBDatabase, IBCustomDataSet,
41			IBHeader, IBSQL, IBUtils;
42
43	tony	1	{ 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			function GetParamsCount: Word;
71			procedure SetPrepared(Value: Boolean);
72			procedure SetPrepare(Value: Boolean);
73			procedure SetProcName(Value: string);
74			procedure Disconnect; override;
75			procedure InternalOpen; override;
76
77			public
78			constructor Create(AOwner: TComponent); override;
79			destructor Destroy; override;
80			procedure CopyParams(Value: TParams);
81			procedure ExecProc;
82			function ParamByName(const Value: string): TParam;
83			procedure Prepare;
84			procedure UnPrepare;
85			property ParamCount: Word read GetParamsCount;
86			property StmtHandle: TISC_STMT_HANDLE read FStmtHandle;
87			property Prepared: Boolean read FPrepared write SetPrepare;
88			property StoredProcedureNames: TStrings read GetStoredProcedureNames;
89
90			published
91			property StoredProcName: string read FProcName write SetProcName;
92			property Params: TParams read FParams write SetParamsList;
93			property Filtered;
94
95			property BeforeDatabaseDisconnect;
96			property AfterDatabaseDisconnect;
97			property DatabaseFree;
98			property BeforeTransactionEnd;
99			property AfterTransactionEnd;
100			property TransactionFree;
101			property OnFilterRecord;
102			end;
103
104			implementation
105
106			uses
107			IBIntf;
108
109			{ TIBStoredProc }
110
111			constructor TIBStoredProc.Create(AOwner: TComponent);
112			begin
113			inherited Create(AOwner);
114			FIBLoaded := False;
115			CheckIBLoaded;
116			FIBLoaded := True;
117			FParams := TParams.Create (self);
118			FNameList := TStringList.Create;
119			end;
120
121			destructor TIBStoredProc.Destroy;
122			begin
123			if FIBLoaded then
124			begin
125			Destroying;
126			Disconnect;
127			FParams.Free;
128			FNameList.Destroy;
129			end;
130			inherited Destroy;
131			end;
132
133			procedure TIBStoredProc.Disconnect;
134			begin
135			Close;
136			UnPrepare;
137			end;
138
139			procedure TIBStoredProc.ExecProc;
140			var
141			DidActivate: Boolean;
142			begin
143			CheckInActive;
144			if StoredProcName = '' then
145			IBError(ibxeNoStoredProcName, [nil]);
146			ActivateConnection;
147			DidActivate := ActivateTransaction;
148			try
149			SetPrepared(True);
150			if DataSource <> nil then SetParamsFromCursor;
151			if FParams.Count > 0 then SetParams;
152			InternalExecQuery;
153			FetchDataIntoOutputParams;
154			finally
155			if DidActivate then
156			DeactivateTransaction;
157			end;
158			end;
159
160			procedure TIBStoredProc.SetProcName(Value: string);
161			begin
162			if not (csReading in ComponentState) then
163			begin
164			CheckInactive;
165			if Value <> FProcName then
166			begin
167			FProcName := Value;
168			FreeStatement;
169			FParams.Clear;
170			if (Value <> '') and
171			(Database <> nil) then
172			GenerateSQL;
173			end;
174			end else begin
175			FProcName := Value;
176			if (Value <> '') and
177			(Database <> nil) then
178			GenerateSQL;
179			end;
180			end;
181
182			function TIBStoredProc.GetParamsCount: Word;
183			begin
184			Result := FParams.Count;
185			end;
186
187			procedure TIBStoredProc.SetFiltered(Value: Boolean);
188			begin
189			if(Filtered <> Value) then
190			begin
191			inherited SetFiltered(value);
192			if Active then
193			begin
194			Close;
195			Open;
196			end;
197			end
198			else
199			inherited SetFiltered(value);
200			end;
201
202			procedure TIBStoredProc.GenerateSQL;
203			var
204			Query : TIBSQL;
205			input : string;
206			begin
207			ActivateConnection;
208			Database.InternalTransaction.StartTransaction;
209			Query := TIBSQL.Create(self);
210			try
211			Query.Database := DataBase;
212			Query.Transaction := Database.InternalTransaction;
213			Query.SQL.Text := 'SELECT RDB$PARAMETER_NAME, RDB$PARAMETER_TYPE ' + {do not localize}
214			'FROM RDB$PROCEDURE_PARAMETERS ' + {do not localize}
215			'WHERE RDB$PROCEDURE_NAME = ' + {do not localize}
216			'''' + FormatIdentifierValue(Database.SQLDialect, FProcName) + '''' +
217			' ORDER BY RDB$PARAMETER_NUMBER'; {do not localize}
218			Query.Prepare;
219			Query.GoToFirstRecordOnExecute := False;
220			Query.ExecQuery;
221			while (not Query.EOF) and (Query.Next <> nil) do begin
222			if (Query.Current.ByName('RDB$PARAMETER_TYPE').AsInteger = 0) then begin {do not localize}
223			if (input <> '') then
224			input := input + ', :' +
225			FormatIdentifier(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString) else {do not localize}
226			input := ':' +
227			FormatIdentifier(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString); {do not localize}
228			end
229			end;
230			SelectSQL.Text := 'Execute Procedure ' + {do not localize}
231			FormatIdentifier(Database.SQLDialect, FProcName) + ' ' + input;
232			finally
233			Query.Free;
234			Database.InternalTransaction.Commit;
235			end;
236			end;
237
238			procedure TIBStoredProc.CreateParamDesc;
239			var
240			i : integer;
241			DataType : TFieldType;
242			begin
243			DataType := ftUnknown;
244			for i := 0 to QSelect.Current.Count - 1 do begin
245			case QSelect.Fields[i].SQLtype of
246			SQL_TYPE_DATE: DataType := ftDate;
247			SQL_TYPE_TIME: DataType := ftTime;
248			SQL_TIMESTAMP: DataType := ftDateTime;
249			SQL_SHORT:
250			if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
251			DataType := ftSmallInt
252			else
253			DataType := ftBCD;
254			SQL_LONG:
255			if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
256			DataType := ftInteger
257			else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
258			DataType := ftBCD
259			else
260			DataType := ftFloat;
261			SQL_INT64:
262			if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
263			DataType := ftLargeInt
264			else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
265			DataType := ftBCD
266			else
267			DataType := ftFloat;
268			SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
269			SQL_TEXT: DataType := ftString;
270			SQL_VARYING:
271			if ((QSelect.Fields[i].AsXSQLVar)^.sqllen < 1024) then
272			DataType := ftString
273			else DataType := ftBlob;
274			SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
275			end;
276			FParams.CreateParam(DataType, Trim(QSelect.Fields[i].Name), ptOutput);
277			end;
278
279			DataType := ftUnknown;
280			for i := 0 to QSelect.Params.Count - 1 do begin
281			case QSelect.Params[i].SQLtype of
282			SQL_TYPE_DATE: DataType := ftDate;
283			SQL_TYPE_TIME: DataType := ftTime;
284			SQL_TIMESTAMP: DataType := ftDateTime;
285			SQL_SHORT:
286			if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
287			DataType := ftSmallInt
288			else
289			DataType := ftBCD;
290			SQL_LONG:
291			if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
292			DataType := ftInteger
293			else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
294			DataType := ftBCD
295			else DataType := ftFloat;
296			SQL_INT64:
297			if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
298			DataType := ftLargeInt
299			else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
300			DataType := ftBCD
301			else DataType := ftFloat;
302			SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
303			SQL_TEXT: DataType := ftString;
304			SQL_VARYING:
305			if ((QSelect.Params[i].AsXSQLVar)^.sqllen < 1024) then
306			DataType := ftString
307			else DataType := ftBlob;
308			SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
309			end;
310			FParams.CreateParam(DataType, Trim(QSelect.Params[i].Name), ptInput);
311			end;
312			end;
313
314			procedure TIBStoredProc.SetPrepared(Value: Boolean);
315			begin
316			if Prepared <> Value then
317			begin
318			if Value then
319			try
320			if SelectSQL.Text = '' then GenerateSQL;
321			InternalPrepare;
322			if FParams.Count = 0 then CreateParamDesc;
323			FPrepared := True;
324			except
325			FreeStatement;
326			raise;
327			end
328			else FreeStatement;
329			end;
330
331			end;
332
333			procedure TIBStoredProc.Prepare;
334			begin
335			SetPrepared(True);
336			end;
337
338			procedure TIBStoredProc.UnPrepare;
339			begin
340			SetPrepared(False);
341			end;
342
343			procedure TIBStoredProc.FreeStatement;
344			begin
345			InternalUnPrepare;
346			FPrepared := False;
347			end;
348
349			procedure TIBStoredProc.SetPrepare(Value: Boolean);
350			begin
351			if Value then Prepare
352			else UnPrepare;
353			end;
354
355			procedure TIBStoredProc.CopyParams(Value: TParams);
356			begin
357			if not Prepared and (FParams.Count = 0) then
358			try
359			Prepare;
360			Value.Assign(FParams);
361			finally
362			UnPrepare;
363			end else
364			Value.Assign(FParams);
365			end;
366
367			procedure TIBStoredProc.SetParamsList(Value: TParams);
368			begin
369			CheckInactive;
370			if Prepared then
371			begin
372			SetPrepared(False);
373			FParams.Assign(Value);
374			SetPrepared(True);
375			end else
376			FParams.Assign(Value);
377			end;
378
379			function TIBStoredProc.ParamByName(const Value: string): TParam;
380			begin
381			Result := FParams.ParamByName(Value);
382			end;
383
384			function TIBStoredProc.GetStoredProcedureNames: TStrings;
385			begin
386			FNameList.clear;
387			GetStoredProcedureNamesFromServer;
388			Result := FNameList;
389			end;
390
391			procedure TIBStoredProc.GetStoredProcedureNamesFromServer;
392			var
393			Query : TIBSQL;
394			begin
395			if not (csReading in ComponentState) then begin
396			ActivateConnection;
397			Database.InternalTransaction.StartTransaction;
398			Query := TIBSQL.Create(self);
399			try
400			Query.GoToFirstRecordOnExecute := False;
401			Query.Database := DataBase;
402			Query.Transaction := Database.InternalTransaction;
403			Query.SQL.Text := 'Select RDB$PROCEDURE_NAME from RDB$PROCEDURES'; {do not localize}
404			Query.Prepare;
405			Query.ExecQuery;
406			while (not Query.EOF) and (Query.Next <> nil) do
407			FNameList.Add(TrimRight(Query.Current.ByName('RDB$PROCEDURE_NAME').AsString)); {do not localize}
408			finally
409			Query.Free;
410			Database.InternalTransaction.Commit;
411			end;
412			end;
413			end;
414
415			procedure TIBStoredProc.SetParams;
416			var
417			i : integer;
418			j: integer;
419			begin
420			i := 0;
421			for j := 0 to FParams.Count - 1 do
422			begin
423			if (Params[j].ParamType <> ptInput) then
424			continue;
425			if not Params[j].Bound then
426			IBError(ibxeRequiredParamNotSet, [nil]);
427			if Params[j].IsNull then
428			SQLParams[i].IsNull := True
429			else begin
430			SQLParams[i].IsNull := False;
431			case Params[j].DataType of
432			ftString:
433			SQLParams[i].AsString := Params[j].AsString;
434			ftBoolean, ftSmallint, ftWord:
435			SQLParams[i].AsShort := Params[j].AsSmallInt;
436			ftInteger:
437			SQLParams[i].AsLong := Params[j].AsInteger;
438			{ ftLargeInt:
439			SQLParams[i].AsInt64 := Params[j].AsLargeInt; }
440			ftFloat, ftCurrency:
441			SQLParams[i].AsDouble := Params[j].AsFloat;
442			ftBCD:
443			SQLParams[i].AsCurrency := Params[j].AsCurrency;
444			ftDate:
445			SQLParams[i].AsDate := Params[j].AsDateTime;
446			ftTime:
447			SQLParams[i].AsTime := Params[j].AsDateTime;
448			ftDateTime:
449			SQLParams[i].AsDateTime := Params[j].AsDateTime;
450			ftBlob, ftMemo:
451			SQLParams[i].AsString := Params[j].AsString;
452			else
453			IBError(ibxeNotSupported, [nil]);
454			end;
455			end;
456			Inc(i);
457			end;
458			end;
459
460			procedure TIBStoredProc.SetParamsFromCursor;
461			var
462			I: Integer;
463			DataSet: TDataSet;
464			begin
465			if DataSource <> nil then
466			begin
467			DataSet := DataSource.DataSet;
468			if DataSet <> nil then
469			begin
470			DataSet.FieldDefs.Update;
471			for I := 0 to FParams.Count - 1 do
472			with FParams[I] do
473			if (not Bound) and
474			((ParamType = ptInput) or (ParamType = ptInputOutput)) then
475			AssignField(DataSet.FieldByName(Name));
476			end;
477			end;
478			end;
479
480			procedure TIBStoredProc.FetchDataIntoOutputParams;
481			var
482			i,j : Integer;
483			begin
484			j := 0;
485			for i := 0 to FParams.Count - 1 do
486			with Params[I] do
487			if ParamType = ptOutput then begin
488			Value := QSelect.Fields[j].Value;
489			Inc(j);
490			end;
491			end;
492
493			procedure TIBStoredProc.InternalOpen;
494			begin
495			IBError(ibxeIsAExecuteProcedure,[nil]);
496			end;
497
498			procedure TIBStoredProc.DefineProperties(Filer: TFiler);
499
500			function WriteData: Boolean;
501			begin
502			if Filer.Ancestor <> nil then
503			Result := not FParams.IsEqual(TIBStoredProc(Filer.Ancestor).FParams) else
504			Result := FParams.Count > 0;
505			end;
506
507			begin
508			inherited DefineProperties(Filer);
509			Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
510			end;
511
512			procedure TIBStoredProc.WriteParamData(Writer: TWriter);
513			begin
514			Writer.WriteCollection(Params);
515			end;
516
517			procedure TIBStoredProc.ReadParamData(Reader: TReader);
518			begin
519			Reader.ReadValue;
520			Reader.ReadCollection(Params);
521			end;
522
523			end.