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                                       }
{                                                                        }
{************************************************************************}

unit IBStoredProc;

interface

uses Windows, SysUtils, Graphics, Classes, Controls, Db, StdVCL, 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
    { IProviderSupport }
    procedure PSExecute; override;
    function PSGetTableName: string; override;
    function PSGetParams: TParams; override;
    procedure PSSetCommandText(const CommandText: string); override;
    procedure PSSetParams(AParams: TParams); override;

    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;

{ TIBStoredProc IProviderSupport }

function TIBStoredProc.PSGetParams: TParams;
begin
  Result := Params;
end;

procedure TIBStoredProc.PSSetParams(AParams: TParams);
begin
  if AParams.Count > 0 then
    Params.Assign(AParams);
  Close;
end;

function TIBStoredProc.PSGetTableName: string;
begin
  { ! }
end;

procedure TIBStoredProc.PSExecute;
begin
  ExecProc;
end;

procedure TIBStoredProc.PSSetCommandText(const CommandText: string);
begin
  if CommandText <> '' then
    StoredProcName := CommandText;
end;

end.
Revision:	1
Committed:	Mon Jul 31 16:43:00 2000 UTC (23 years, 8 months ago) by tony
Content type:	text/x-pascal
File size:	15694 byte(s)
Log Message:	Borland IBX Open Source Release
#	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	{************************************************************************}
28
29	unit IBStoredProc;
30
31	interface
32
33	uses Windows, SysUtils, Graphics, Classes, Controls, Db, StdVCL, IB,
34	IBDatabase, IBCustomDataSet, IBHeader, IBSQL, IBUtils;
35
36	{ TIBStoredProc }
37	type
38
39	TIBStoredProc = class(TIBCustomDataSet)
40	private
41	FIBLoaded: Boolean;
42	FStmtHandle: TISC_STMT_HANDLE;
43	FProcName: string;
44	FParams: TParams;
45	FPrepared: Boolean;
46	FNameList: TStrings;
47	procedure SetParamsList(Value: TParams);
48	procedure FreeStatement;
49	function GetStoredProcedureNames: TStrings;
50	procedure GetStoredProcedureNamesFromServer;
51	procedure CreateParamDesc;
52	procedure SetParams;
53	procedure SetParamsFromCursor;
54	procedure GenerateSQL;
55	procedure FetchDataIntoOutputParams;
56	procedure ReadParamData(Reader: TReader);
57	procedure WriteParamData(Writer: TWriter);
58
59	protected
60	{ IProviderSupport }
61	procedure PSExecute; override;
62	function PSGetTableName: string; override;
63	function PSGetParams: TParams; override;
64	procedure PSSetCommandText(const CommandText: string); override;
65	procedure PSSetParams(AParams: TParams); override;
66
67	procedure DefineProperties(Filer: TFiler); override;
68	procedure SetFiltered(Value: Boolean); override;
69	function GetParamsCount: Word;
70	procedure SetPrepared(Value: Boolean);
71	procedure SetPrepare(Value: Boolean);
72	procedure SetProcName(Value: string);
73	procedure Disconnect; override;
74	procedure InternalOpen; override;
75
76	public
77	constructor Create(AOwner: TComponent); override;
78	destructor Destroy; override;
79	procedure CopyParams(Value: TParams);
80	procedure ExecProc;
81	function ParamByName(const Value: string): TParam;
82	procedure Prepare;
83	procedure UnPrepare;
84	property ParamCount: Word read GetParamsCount;
85	property StmtHandle: TISC_STMT_HANDLE read FStmtHandle;
86	property Prepared: Boolean read FPrepared write SetPrepare;
87	property StoredProcedureNames: TStrings read GetStoredProcedureNames;
88
89	published
90	property StoredProcName: string read FProcName write SetProcName;
91	property Params: TParams read FParams write SetParamsList;
92	property Filtered;
93
94	property BeforeDatabaseDisconnect;
95	property AfterDatabaseDisconnect;
96	property DatabaseFree;
97	property BeforeTransactionEnd;
98	property AfterTransactionEnd;
99	property TransactionFree;
100	property OnFilterRecord;
101	end;
102
103	implementation
104
105	uses
106	IBIntf;
107
108	{ TIBStoredProc }
109
110	constructor TIBStoredProc.Create(AOwner: TComponent);
111	begin
112	inherited Create(AOwner);
113	FIBLoaded := False;
114	CheckIBLoaded;
115	FIBLoaded := True;
116	FParams := TParams.Create (self);
117	FNameList := TStringList.Create;
118	end;
119
120	destructor TIBStoredProc.Destroy;
121	begin
122	if FIBLoaded then
123	begin
124	Destroying;
125	Disconnect;
126	FParams.Free;
127	FNameList.Destroy;
128	end;
129	inherited Destroy;
130	end;
131
132	procedure TIBStoredProc.Disconnect;
133	begin
134	Close;
135	UnPrepare;
136	end;
137
138	procedure TIBStoredProc.ExecProc;
139	var
140	DidActivate: Boolean;
141	begin
142	CheckInActive;
143	if StoredProcName = '' then
144	IBError(ibxeNoStoredProcName, [nil]);
145	ActivateConnection;
146	DidActivate := ActivateTransaction;
147	try
148	SetPrepared(True);
149	if DataSource <> nil then SetParamsFromCursor;
150	if FParams.Count > 0 then SetParams;
151	InternalExecQuery;
152	FetchDataIntoOutputParams;
153	finally
154	if DidActivate then
155	DeactivateTransaction;
156	end;
157	end;
158
159	procedure TIBStoredProc.SetProcName(Value: string);
160	begin
161	if not (csReading in ComponentState) then
162	begin
163	CheckInactive;
164	if Value <> FProcName then
165	begin
166	FProcName := Value;
167	FreeStatement;
168	FParams.Clear;
169	if (Value <> '') and
170	(Database <> nil) then
171	GenerateSQL;
172	end;
173	end else begin
174	FProcName := Value;
175	if (Value <> '') and
176	(Database <> nil) then
177	GenerateSQL;
178	end;
179	end;
180
181	function TIBStoredProc.GetParamsCount: Word;
182	begin
183	Result := FParams.Count;
184	end;
185
186	procedure TIBStoredProc.SetFiltered(Value: Boolean);
187	begin
188	if(Filtered <> Value) then
189	begin
190	inherited SetFiltered(value);
191	if Active then
192	begin
193	Close;
194	Open;
195	end;
196	end
197	else
198	inherited SetFiltered(value);
199	end;
200
201	procedure TIBStoredProc.GenerateSQL;
202	var
203	Query : TIBSQL;
204	input : string;
205	begin
206	ActivateConnection;
207	Database.InternalTransaction.StartTransaction;
208	Query := TIBSQL.Create(self);
209	try
210	Query.Database := DataBase;
211	Query.Transaction := Database.InternalTransaction;
212	Query.SQL.Text := 'SELECT RDB$PARAMETER_NAME, RDB$PARAMETER_TYPE ' + {do not localize}
213	'FROM RDB$PROCEDURE_PARAMETERS ' + {do not localize}
214	'WHERE RDB$PROCEDURE_NAME = ' + {do not localize}
215	'''' + FormatIdentifierValue(Database.SQLDialect, FProcName) + '''' +
216	' ORDER BY RDB$PARAMETER_NUMBER'; {do not localize}
217	Query.Prepare;
218	Query.GoToFirstRecordOnExecute := False;
219	Query.ExecQuery;
220	while (not Query.EOF) and (Query.Next <> nil) do begin
221	if (Query.Current.ByName('RDB$PARAMETER_TYPE').AsInteger = 0) then begin {do not localize}
222	if (input <> '') then
223	input := input + ', :' +
224	FormatIdentifier(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString) else {do not localize}
225	input := ':' +
226	FormatIdentifier(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString); {do not localize}
227	end
228	end;
229	SelectSQL.Text := 'Execute Procedure ' + {do not localize}
230	FormatIdentifier(Database.SQLDialect, FProcName) + ' ' + input;
231	finally
232	Query.Free;
233	Database.InternalTransaction.Commit;
234	end;
235	end;
236
237	procedure TIBStoredProc.CreateParamDesc;
238	var
239	i : integer;
240	DataType : TFieldType;
241	begin
242	DataType := ftUnknown;
243	for i := 0 to QSelect.Current.Count - 1 do begin
244	case QSelect.Fields[i].SQLtype of
245	SQL_TYPE_DATE: DataType := ftDate;
246	SQL_TYPE_TIME: DataType := ftTime;
247	SQL_TIMESTAMP: DataType := ftDateTime;
248	SQL_SHORT:
249	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
250	DataType := ftSmallInt
251	else
252	DataType := ftBCD;
253	SQL_LONG:
254	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
255	DataType := ftInteger
256	else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
257	DataType := ftBCD
258	else
259	DataType := ftFloat;
260	SQL_INT64:
261	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
262	DataType := ftLargeInt
263	else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
264	DataType := ftBCD
265	else
266	DataType := ftFloat;
267	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
268	SQL_TEXT: DataType := ftString;
269	SQL_VARYING:
270	if ((QSelect.Fields[i].AsXSQLVar)^.sqllen < 1024) then
271	DataType := ftString
272	else DataType := ftBlob;
273	SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
274	end;
275	FParams.CreateParam(DataType, Trim(QSelect.Fields[i].Name), ptOutput);
276	end;
277
278	DataType := ftUnknown;
279	for i := 0 to QSelect.Params.Count - 1 do begin
280	case QSelect.Params[i].SQLtype of
281	SQL_TYPE_DATE: DataType := ftDate;
282	SQL_TYPE_TIME: DataType := ftTime;
283	SQL_TIMESTAMP: DataType := ftDateTime;
284	SQL_SHORT:
285	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
286	DataType := ftSmallInt
287	else
288	DataType := ftBCD;
289	SQL_LONG:
290	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
291	DataType := ftInteger
292	else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
293	DataType := ftBCD
294	else DataType := ftFloat;
295	SQL_INT64:
296	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
297	DataType := ftLargeInt
298	else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
299	DataType := ftBCD
300	else DataType := ftFloat;
301	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
302	SQL_TEXT: DataType := ftString;
303	SQL_VARYING:
304	if ((QSelect.Params[i].AsXSQLVar)^.sqllen < 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.Params[i].Name), ptInput);
310	end;
311	end;
312
313	procedure TIBStoredProc.SetPrepared(Value: Boolean);
314	begin
315	if Prepared <> Value then
316	begin
317	if Value then
318	try
319	if SelectSQL.Text = '' then GenerateSQL;
320	InternalPrepare;
321	if FParams.Count = 0 then CreateParamDesc;
322	FPrepared := True;
323	except
324	FreeStatement;
325	raise;
326	end
327	else FreeStatement;
328	end;
329
330	end;
331
332	procedure TIBStoredProc.Prepare;
333	begin
334	SetPrepared(True);
335	end;
336
337	procedure TIBStoredProc.UnPrepare;
338	begin
339	SetPrepared(False);
340	end;
341
342	procedure TIBStoredProc.FreeStatement;
343	begin
344	InternalUnPrepare;
345	FPrepared := False;
346	end;
347
348	procedure TIBStoredProc.SetPrepare(Value: Boolean);
349	begin
350	if Value then Prepare
351	else UnPrepare;
352	end;
353
354	procedure TIBStoredProc.CopyParams(Value: TParams);
355	begin
356	if not Prepared and (FParams.Count = 0) then
357	try
358	Prepare;
359	Value.Assign(FParams);
360	finally
361	UnPrepare;
362	end else
363	Value.Assign(FParams);
364	end;
365
366	procedure TIBStoredProc.SetParamsList(Value: TParams);
367	begin
368	CheckInactive;
369	if Prepared then
370	begin
371	SetPrepared(False);
372	FParams.Assign(Value);
373	SetPrepared(True);
374	end else
375	FParams.Assign(Value);
376	end;
377
378	function TIBStoredProc.ParamByName(const Value: string): TParam;
379	begin
380	Result := FParams.ParamByName(Value);
381	end;
382
383	function TIBStoredProc.GetStoredProcedureNames: TStrings;
384	begin
385	FNameList.clear;
386	GetStoredProcedureNamesFromServer;
387	Result := FNameList;
388	end;
389
390	procedure TIBStoredProc.GetStoredProcedureNamesFromServer;
391	var
392	Query : TIBSQL;
393	begin
394	if not (csReading in ComponentState) then begin
395	ActivateConnection;
396	Database.InternalTransaction.StartTransaction;
397	Query := TIBSQL.Create(self);
398	try
399	Query.GoToFirstRecordOnExecute := False;
400	Query.Database := DataBase;
401	Query.Transaction := Database.InternalTransaction;
402	Query.SQL.Text := 'Select RDB$PROCEDURE_NAME from RDB$PROCEDURES'; {do not localize}
403	Query.Prepare;
404	Query.ExecQuery;
405	while (not Query.EOF) and (Query.Next <> nil) do
406	FNameList.Add(TrimRight(Query.Current.ByName('RDB$PROCEDURE_NAME').AsString)); {do not localize}
407	finally
408	Query.Free;
409	Database.InternalTransaction.Commit;
410	end;
411	end;
412	end;
413
414	procedure TIBStoredProc.SetParams;
415	var
416	i : integer;
417	j: integer;
418	begin
419	i := 0;
420	for j := 0 to FParams.Count - 1 do
421	begin
422	if (Params[j].ParamType <> ptInput) then
423	continue;
424	if not Params[j].Bound then
425	IBError(ibxeRequiredParamNotSet, [nil]);
426	if Params[j].IsNull then
427	SQLParams[i].IsNull := True
428	else begin
429	SQLParams[i].IsNull := False;
430	case Params[j].DataType of
431	ftString:
432	SQLParams[i].AsString := Params[j].AsString;
433	ftBoolean, ftSmallint, ftWord:
434	SQLParams[i].AsShort := Params[j].AsSmallInt;
435	ftInteger:
436	SQLParams[i].AsLong := Params[j].AsInteger;
437	{ ftLargeInt:
438	SQLParams[i].AsInt64 := Params[j].AsLargeInt; }
439	ftFloat, ftCurrency:
440	SQLParams[i].AsDouble := Params[j].AsFloat;
441	ftBCD:
442	SQLParams[i].AsCurrency := Params[j].AsCurrency;
443	ftDate:
444	SQLParams[i].AsDate := Params[j].AsDateTime;
445	ftTime:
446	SQLParams[i].AsTime := Params[j].AsDateTime;
447	ftDateTime:
448	SQLParams[i].AsDateTime := Params[j].AsDateTime;
449	ftBlob, ftMemo:
450	SQLParams[i].AsString := Params[j].AsString;
451	else
452	IBError(ibxeNotSupported, [nil]);
453	end;
454	end;
455	Inc(i);
456	end;
457	end;
458
459	procedure TIBStoredProc.SetParamsFromCursor;
460	var
461	I: Integer;
462	DataSet: TDataSet;
463	begin
464	if DataSource <> nil then
465	begin
466	DataSet := DataSource.DataSet;
467	if DataSet <> nil then
468	begin
469	DataSet.FieldDefs.Update;
470	for I := 0 to FParams.Count - 1 do
471	with FParams[I] do
472	if (not Bound) and
473	((ParamType = ptInput) or (ParamType = ptInputOutput)) then
474	AssignField(DataSet.FieldByName(Name));
475	end;
476	end;
477	end;
478
479	procedure TIBStoredProc.FetchDataIntoOutputParams;
480	var
481	i,j : Integer;
482	begin
483	j := 0;
484	for i := 0 to FParams.Count - 1 do
485	with Params[I] do
486	if ParamType = ptOutput then begin
487	Value := QSelect.Fields[j].Value;
488	Inc(j);
489	end;
490	end;
491
492	procedure TIBStoredProc.InternalOpen;
493	begin
494	IBError(ibxeIsAExecuteProcedure,[nil]);
495	end;
496
497	procedure TIBStoredProc.DefineProperties(Filer: TFiler);
498
499	function WriteData: Boolean;
500	begin
501	if Filer.Ancestor <> nil then
502	Result := not FParams.IsEqual(TIBStoredProc(Filer.Ancestor).FParams) else
503	Result := FParams.Count > 0;
504	end;
505
506	begin
507	inherited DefineProperties(Filer);
508	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
509	end;
510
511	procedure TIBStoredProc.WriteParamData(Writer: TWriter);
512	begin
513	Writer.WriteCollection(Params);
514	end;
515
516	procedure TIBStoredProc.ReadParamData(Reader: TReader);
517	begin
518	Reader.ReadValue;
519	Reader.ReadCollection(Params);
520	end;
521
522	{ TIBStoredProc IProviderSupport }
523
524	function TIBStoredProc.PSGetParams: TParams;
525	begin
526	Result := Params;
527	end;
528
529	procedure TIBStoredProc.PSSetParams(AParams: TParams);
530	begin
531	if AParams.Count > 0 then
532	Params.Assign(AParams);
533	Close;
534	end;
535
536	function TIBStoredProc.PSGetTableName: string;
537	begin
538	{ ! }
539	end;
540
541	procedure TIBStoredProc.PSExecute;
542	begin
543	ExecProc;
544	end;
545
546	procedure TIBStoredProc.PSSetCommandText(const CommandText: string);
547	begin
548	if CommandText <> '' then
549	StoredProcName := CommandText;
550	end;
551
552	end.