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;
    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: 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.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
  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$PARAMETER_NUMBER'; {do not localize}
    Query.Prepare;
    Query.GoToFirstRecordOnExecute := False;
    Query.ExecQuery;
    while (not Query.EOF) and (Query.Next <> nil) do begin
      if (Query.Current.ByName('RDB$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.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:	19
Committed:	Mon Jul 7 13:00:15 2014 UTC (10 years, 4 months ago) by tony
Content type:	text/x-pascal
File size:	16614 byte(s)
Log Message:	Committing updates for Release R1-1-0
#	User	Rev	Content
1	tony	17	{************************************************************************}
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	tony	19	procedure InitFieldDefs; override;
71	tony	17	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	tony	19	procedure TIBStoredProc.InitFieldDefs;
204			begin
205			if SelectSQL.Text = '' then
206			GenerateSQL;
207			inherited InitFieldDefs;
208			end;
209
210	tony	17	procedure TIBStoredProc.GenerateSQL;
211	tony	19
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	tony	17	var
235			Query : TIBSQL;
236			input : string;
237			begin
238	tony	19	if FProcName = '' then
239			IBError(ibxeNoStoredProcName,[nil]);
240	tony	17	ActivateConnection;
241			Database.InternalTransaction.StartTransaction;
242	tony	19	Params := TStringList.Create;
243	tony	17	Query := TIBSQL.Create(self);
244			try
245			Query.Database := DataBase;
246			Query.Transaction := Database.InternalTransaction;
247			Query.SQL.Text := 'SELECT RDB$PARAMETER_NAME, RDB$PARAMETER_TYPE ' + {do not localize}
248			'FROM RDB$PROCEDURE_PARAMETERS ' + {do not localize}
249			'WHERE RDB$PROCEDURE_NAME = ' + {do not localize}
250			'''' + FormatIdentifierValue(Database.SQLDialect, FProcName) + '''' +
251			' ORDER BY RDB$PARAMETER_NUMBER'; {do not localize}
252			Query.Prepare;
253			Query.GoToFirstRecordOnExecute := False;
254			Query.ExecQuery;
255			while (not Query.EOF) and (Query.Next <> nil) do begin
256			if (Query.Current.ByName('RDB$PARAMETER_TYPE').AsInteger = 0) then begin {do not localize}
257			if (input <> '') then
258			input := input + ', :' +
259	tony	19	FormatParameter(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString) else {do not localize}
260	tony	17	input := ':' +
261	tony	19	FormatParameter(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString); {do not localize}
262	tony	17	end
263			end;
264			SelectSQL.Text := 'Execute Procedure ' + {do not localize}
265	tony	19	FormatParameter(Database.SQLDialect, FProcName) + ' ' + input;
266			{ writeln(SelectSQL.Text);}
267	tony	17	finally
268			Query.Free;
269	tony	19	Params.Free;
270	tony	17	Database.InternalTransaction.Commit;
271			end;
272			end;
273
274			procedure TIBStoredProc.CreateParamDesc;
275			var
276			i : integer;
277			DataType : TFieldType;
278			begin
279			DataType := ftUnknown;
280			for i := 0 to QSelect.Current.Count - 1 do begin
281			case QSelect.Fields[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.Fields[i].AsXSQLVar)^.sqlscale = 0) then
287			DataType := ftSmallInt
288			else
289			DataType := ftBCD;
290			SQL_LONG:
291			if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
292			DataType := ftInteger
293			else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
294			DataType := ftBCD
295			else
296			DataType := ftFloat;
297			SQL_INT64:
298			if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
299			DataType := ftLargeInt
300			else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
301			DataType := ftBCD
302			else
303			DataType := ftFloat;
304			SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
305			SQL_TEXT: DataType := ftString;
306			SQL_VARYING:
307			if ((QSelect.Fields[i].AsXSQLVar)^.sqllen < 1024) then
308			DataType := ftString
309			else DataType := ftBlob;
310			SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
311			end;
312			FParams.CreateParam(DataType, Trim(QSelect.Fields[i].Name), ptOutput);
313			end;
314
315			DataType := ftUnknown;
316			for i := 0 to QSelect.Params.Count - 1 do begin
317			case QSelect.Params[i].SQLtype of
318			SQL_TYPE_DATE: DataType := ftDate;
319			SQL_TYPE_TIME: DataType := ftTime;
320			SQL_TIMESTAMP: DataType := ftDateTime;
321			SQL_SHORT:
322			if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
323			DataType := ftSmallInt
324			else
325			DataType := ftBCD;
326			SQL_LONG:
327			if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
328			DataType := ftInteger
329			else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
330			DataType := ftBCD
331			else DataType := ftFloat;
332			SQL_INT64:
333			if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
334			DataType := ftLargeInt
335			else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
336			DataType := ftBCD
337			else DataType := ftFloat;
338			SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
339			SQL_TEXT: DataType := ftString;
340			SQL_VARYING:
341			if ((QSelect.Params[i].AsXSQLVar)^.sqllen < 1024) then
342			DataType := ftString
343			else DataType := ftBlob;
344			SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
345			end;
346			FParams.CreateParam(DataType, Trim(QSelect.Params[i].Name), ptInput);
347			end;
348			end;
349
350			procedure TIBStoredProc.SetPrepared(Value: Boolean);
351			begin
352			if Prepared <> Value then
353			begin
354			if Value then
355			try
356			if SelectSQL.Text = '' then GenerateSQL;
357			InternalPrepare;
358			if FParams.Count = 0 then CreateParamDesc;
359			FPrepared := True;
360			except
361			FreeStatement;
362			raise;
363			end
364			else FreeStatement;
365			end;
366
367			end;
368
369			procedure TIBStoredProc.Prepare;
370			begin
371			SetPrepared(True);
372			end;
373
374			procedure TIBStoredProc.UnPrepare;
375			begin
376			SetPrepared(False);
377			end;
378
379			procedure TIBStoredProc.FreeStatement;
380			begin
381			InternalUnPrepare;
382			FPrepared := False;
383			end;
384
385			procedure TIBStoredProc.SetPrepare(Value: Boolean);
386			begin
387			if Value then Prepare
388			else UnPrepare;
389			end;
390
391			procedure TIBStoredProc.CopyParams(Value: TParams);
392			begin
393			if not Prepared and (FParams.Count = 0) then
394			try
395			Prepare;
396			Value.Assign(FParams);
397			finally
398			UnPrepare;
399			end else
400			Value.Assign(FParams);
401			end;
402
403			procedure TIBStoredProc.SetParamsList(Value: TParams);
404			begin
405			CheckInactive;
406			if Prepared then
407			begin
408			SetPrepared(False);
409			FParams.Assign(Value);
410			SetPrepared(True);
411			end else
412			FParams.Assign(Value);
413			end;
414
415			function TIBStoredProc.ParamByName(const Value: string): TParam;
416			begin
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$PROCEDURES'; {do not localize}
440			Query.Prepare;
441			Query.ExecQuery;
442			while (not Query.EOF) and (Query.Next <> nil) do
443			FNameList.Add(TrimRight(Query.Current.ByName('RDB$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, [nil]);
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			ftBoolean, ftSmallint, ftWord:
471			SQLParams[i].AsShort := Params[j].AsSmallInt;
472			ftInteger:
473			SQLParams[i].AsLong := Params[j].AsInteger;
474	tony	19	ftLargeInt:
475			SQLParams[i].AsInt64 := Params[j].AsLargeInt;
476	tony	17	ftFloat, ftCurrency:
477			SQLParams[i].AsDouble := Params[j].AsFloat;
478			ftBCD:
479			SQLParams[i].AsCurrency := Params[j].AsCurrency;
480			ftDate:
481			SQLParams[i].AsDate := Params[j].AsDateTime;
482			ftTime:
483			SQLParams[i].AsTime := Params[j].AsDateTime;
484			ftDateTime:
485			SQLParams[i].AsDateTime := Params[j].AsDateTime;
486			ftBlob, ftMemo:
487			SQLParams[i].AsString := Params[j].AsString;
488			else
489			IBError(ibxeNotSupported, [nil]);
490			end;
491			end;
492			Inc(i);
493			end;
494			end;
495
496			procedure TIBStoredProc.SetParamsFromCursor;
497			var
498			I: Integer;
499			DataSet: TDataSet;
500			begin
501			if DataSource <> nil then
502			begin
503			DataSet := DataSource.DataSet;
504			if DataSet <> nil then
505			begin
506			DataSet.FieldDefs.Update;
507			for I := 0 to FParams.Count - 1 do
508			with FParams[I] do
509			if (not Bound) and
510			((ParamType = ptInput) or (ParamType = ptInputOutput)) then
511			AssignField(DataSet.FieldByName(Name));
512			end;
513			end;
514			end;
515
516			procedure TIBStoredProc.FetchDataIntoOutputParams;
517			var
518			i,j : Integer;
519			begin
520			j := 0;
521			for i := 0 to FParams.Count - 1 do
522			with Params[I] do
523			if ParamType = ptOutput then begin
524			Value := QSelect.Fields[j].Value;
525			Inc(j);
526			end;
527			end;
528
529			procedure TIBStoredProc.InternalOpen;
530			begin
531			IBError(ibxeIsAExecuteProcedure,[nil]);
532			end;
533
534			procedure TIBStoredProc.DefineProperties(Filer: TFiler);
535
536			function WriteData: Boolean;
537			begin
538			if Filer.Ancestor <> nil then
539			Result := not FParams.IsEqual(TIBStoredProc(Filer.Ancestor).FParams) else
540			Result := FParams.Count > 0;
541			end;
542
543			begin
544			inherited DefineProperties(Filer);
545			Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
546			end;
547
548			procedure TIBStoredProc.WriteParamData(Writer: TWriter);
549			begin
550			Writer.WriteCollection(Params);
551			end;
552
553			procedure TIBStoredProc.ReadParamData(Reader: TReader);
554			begin
555			Reader.ReadValue;
556			Reader.ReadCollection(Params);
557			end;
558
559	tony	19	end.