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;

{$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:	5
Committed:	Fri Feb 18 16:26:16 2011 UTC (13 years, 9 months ago) by tony
Content type:	text/x-pascal
File size:	14890 byte(s)
Log Message:	Committing updates for Release pre-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	{$Mode Delphi}
32
33	interface
34
35	uses SysUtils, Classes, DB, IB, IBDatabase, IBCustomDataSet,
36	IBHeader, IBSQL, IBUtils;
37
38	{ TIBStoredProc }
39	type
40
41	TIBStoredProc = class(TIBCustomDataSet)
42	private
43	FIBLoaded: Boolean;
44	FStmtHandle: TISC_STMT_HANDLE;
45	FProcName: string;
46	FParams: TParams;
47	FPrepared: Boolean;
48	FNameList: TStrings;
49	procedure SetParamsList(Value: TParams);
50	procedure FreeStatement;
51	function GetStoredProcedureNames: TStrings;
52	procedure GetStoredProcedureNamesFromServer;
53	procedure CreateParamDesc;
54	procedure SetParams;
55	procedure SetParamsFromCursor;
56	procedure GenerateSQL;
57	procedure FetchDataIntoOutputParams;
58	procedure ReadParamData(Reader: TReader);
59	procedure WriteParamData(Writer: TWriter);
60
61	protected
62
63	procedure DefineProperties(Filer: TFiler); override;
64	procedure SetFiltered(Value: Boolean); override;
65	function GetParamsCount: Word;
66	procedure SetPrepared(Value: Boolean);
67	procedure SetPrepare(Value: Boolean);
68	procedure SetProcName(Value: string);
69	procedure Disconnect; override;
70	procedure InternalOpen; override;
71
72	public
73	constructor Create(AOwner: TComponent); override;
74	destructor Destroy; override;
75	procedure CopyParams(Value: TParams);
76	procedure ExecProc;
77	function ParamByName(const Value: string): TParam;
78	procedure Prepare;
79	procedure UnPrepare;
80	property ParamCount: Word read GetParamsCount;
81	property StmtHandle: TISC_STMT_HANDLE read FStmtHandle;
82	property Prepared: Boolean read FPrepared write SetPrepare;
83	property StoredProcedureNames: TStrings read GetStoredProcedureNames;
84
85	published
86	property StoredProcName: string read FProcName write SetProcName;
87	property Params: TParams read FParams write SetParamsList;
88	property Filtered;
89
90	property BeforeDatabaseDisconnect;
91	property AfterDatabaseDisconnect;
92	property DatabaseFree;
93	property BeforeTransactionEnd;
94	property AfterTransactionEnd;
95	property TransactionFree;
96	property OnFilterRecord;
97	end;
98
99	implementation
100
101	uses
102	IBIntf;
103
104	{ TIBStoredProc }
105
106	constructor TIBStoredProc.Create(AOwner: TComponent);
107	begin
108	inherited Create(AOwner);
109	FIBLoaded := False;
110	CheckIBLoaded;
111	FIBLoaded := True;
112	FParams := TParams.Create (self);
113	FNameList := TStringList.Create;
114	end;
115
116	destructor TIBStoredProc.Destroy;
117	begin
118	if FIBLoaded then
119	begin
120	Destroying;
121	Disconnect;
122	FParams.Free;
123	FNameList.Destroy;
124	end;
125	inherited Destroy;
126	end;
127
128	procedure TIBStoredProc.Disconnect;
129	begin
130	Close;
131	UnPrepare;
132	end;
133
134	procedure TIBStoredProc.ExecProc;
135	var
136	DidActivate: Boolean;
137	begin
138	CheckInActive;
139	if StoredProcName = '' then
140	IBError(ibxeNoStoredProcName, [nil]);
141	ActivateConnection;
142	DidActivate := ActivateTransaction;
143	try
144	SetPrepared(True);
145	if DataSource <> nil then SetParamsFromCursor;
146	if FParams.Count > 0 then SetParams;
147	InternalExecQuery;
148	FetchDataIntoOutputParams;
149	finally
150	if DidActivate then
151	DeactivateTransaction;
152	end;
153	end;
154
155	procedure TIBStoredProc.SetProcName(Value: string);
156	begin
157	if not (csReading in ComponentState) then
158	begin
159	CheckInactive;
160	if Value <> FProcName then
161	begin
162	FProcName := Value;
163	FreeStatement;
164	FParams.Clear;
165	if (Value <> '') and
166	(Database <> nil) then
167	GenerateSQL;
168	end;
169	end else begin
170	FProcName := Value;
171	if (Value <> '') and
172	(Database <> nil) then
173	GenerateSQL;
174	end;
175	end;
176
177	function TIBStoredProc.GetParamsCount: Word;
178	begin
179	Result := FParams.Count;
180	end;
181
182	procedure TIBStoredProc.SetFiltered(Value: Boolean);
183	begin
184	if(Filtered <> Value) then
185	begin
186	inherited SetFiltered(value);
187	if Active then
188	begin
189	Close;
190	Open;
191	end;
192	end
193	else
194	inherited SetFiltered(value);
195	end;
196
197	procedure TIBStoredProc.GenerateSQL;
198	var
199	Query : TIBSQL;
200	input : string;
201	begin
202	ActivateConnection;
203	Database.InternalTransaction.StartTransaction;
204	Query := TIBSQL.Create(self);
205	try
206	Query.Database := DataBase;
207	Query.Transaction := Database.InternalTransaction;
208	Query.SQL.Text := 'SELECT RDB$PARAMETER_NAME, RDB$PARAMETER_TYPE ' + {do not localize}
209	'FROM RDB$PROCEDURE_PARAMETERS ' + {do not localize}
210	'WHERE RDB$PROCEDURE_NAME = ' + {do not localize}
211	'''' + FormatIdentifierValue(Database.SQLDialect, FProcName) + '''' +
212	' ORDER BY RDB$PARAMETER_NUMBER'; {do not localize}
213	Query.Prepare;
214	Query.GoToFirstRecordOnExecute := False;
215	Query.ExecQuery;
216	while (not Query.EOF) and (Query.Next <> nil) do begin
217	if (Query.Current.ByName('RDB$PARAMETER_TYPE').AsInteger = 0) then begin {do not localize}
218	if (input <> '') then
219	input := input + ', :' +
220	FormatIdentifier(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString) else {do not localize}
221	input := ':' +
222	FormatIdentifier(Database.SQLDialect, Query.Current.ByName('RDB$PARAMETER_NAME').AsString); {do not localize}
223	end
224	end;
225	SelectSQL.Text := 'Execute Procedure ' + {do not localize}
226	FormatIdentifier(Database.SQLDialect, FProcName) + ' ' + input;
227	finally
228	Query.Free;
229	Database.InternalTransaction.Commit;
230	end;
231	end;
232
233	procedure TIBStoredProc.CreateParamDesc;
234	var
235	i : integer;
236	DataType : TFieldType;
237	begin
238	DataType := ftUnknown;
239	for i := 0 to QSelect.Current.Count - 1 do begin
240	case QSelect.Fields[i].SQLtype of
241	SQL_TYPE_DATE: DataType := ftDate;
242	SQL_TYPE_TIME: DataType := ftTime;
243	SQL_TIMESTAMP: DataType := ftDateTime;
244	SQL_SHORT:
245	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
246	DataType := ftSmallInt
247	else
248	DataType := ftBCD;
249	SQL_LONG:
250	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
251	DataType := ftInteger
252	else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
253	DataType := ftBCD
254	else
255	DataType := ftFloat;
256	SQL_INT64:
257	if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale = 0) then
258	DataType := ftLargeInt
259	else if ((QSelect.Fields[i].AsXSQLVar)^.sqlscale >= (-4)) then
260	DataType := ftBCD
261	else
262	DataType := ftFloat;
263	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
264	SQL_TEXT: DataType := ftString;
265	SQL_VARYING:
266	if ((QSelect.Fields[i].AsXSQLVar)^.sqllen < 1024) then
267	DataType := ftString
268	else DataType := ftBlob;
269	SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
270	end;
271	FParams.CreateParam(DataType, Trim(QSelect.Fields[i].Name), ptOutput);
272	end;
273
274	DataType := ftUnknown;
275	for i := 0 to QSelect.Params.Count - 1 do begin
276	case QSelect.Params[i].SQLtype of
277	SQL_TYPE_DATE: DataType := ftDate;
278	SQL_TYPE_TIME: DataType := ftTime;
279	SQL_TIMESTAMP: DataType := ftDateTime;
280	SQL_SHORT:
281	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
282	DataType := ftSmallInt
283	else
284	DataType := ftBCD;
285	SQL_LONG:
286	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
287	DataType := ftInteger
288	else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
289	DataType := ftBCD
290	else DataType := ftFloat;
291	SQL_INT64:
292	if ((QSelect.Params[i].AsXSQLVar)^.sqlscale = 0) then
293	DataType := ftLargeInt
294	else if ((QSelect.Params[i].AsXSQLVar)^.sqlscale >= (-4)) then
295	DataType := ftBCD
296	else DataType := ftFloat;
297	SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT: DataType := ftFloat;
298	SQL_TEXT: DataType := ftString;
299	SQL_VARYING:
300	if ((QSelect.Params[i].AsXSQLVar)^.sqllen < 1024) then
301	DataType := ftString
302	else DataType := ftBlob;
303	SQL_BLOB, SQL_ARRAY, SQL_QUAD: DataType := ftBlob;
304	end;
305	FParams.CreateParam(DataType, Trim(QSelect.Params[i].Name), ptInput);
306	end;
307	end;
308
309	procedure TIBStoredProc.SetPrepared(Value: Boolean);
310	begin
311	if Prepared <> Value then
312	begin
313	if Value then
314	try
315	if SelectSQL.Text = '' then GenerateSQL;
316	InternalPrepare;
317	if FParams.Count = 0 then CreateParamDesc;
318	FPrepared := True;
319	except
320	FreeStatement;
321	raise;
322	end
323	else FreeStatement;
324	end;
325
326	end;
327
328	procedure TIBStoredProc.Prepare;
329	begin
330	SetPrepared(True);
331	end;
332
333	procedure TIBStoredProc.UnPrepare;
334	begin
335	SetPrepared(False);
336	end;
337
338	procedure TIBStoredProc.FreeStatement;
339	begin
340	InternalUnPrepare;
341	FPrepared := False;
342	end;
343
344	procedure TIBStoredProc.SetPrepare(Value: Boolean);
345	begin
346	if Value then Prepare
347	else UnPrepare;
348	end;
349
350	procedure TIBStoredProc.CopyParams(Value: TParams);
351	begin
352	if not Prepared and (FParams.Count = 0) then
353	try
354	Prepare;
355	Value.Assign(FParams);
356	finally
357	UnPrepare;
358	end else
359	Value.Assign(FParams);
360	end;
361
362	procedure TIBStoredProc.SetParamsList(Value: TParams);
363	begin
364	CheckInactive;
365	if Prepared then
366	begin
367	SetPrepared(False);
368	FParams.Assign(Value);
369	SetPrepared(True);
370	end else
371	FParams.Assign(Value);
372	end;
373
374	function TIBStoredProc.ParamByName(const Value: string): TParam;
375	begin
376	Result := FParams.ParamByName(Value);
377	end;
378
379	function TIBStoredProc.GetStoredProcedureNames: TStrings;
380	begin
381	FNameList.clear;
382	GetStoredProcedureNamesFromServer;
383	Result := FNameList;
384	end;
385
386	procedure TIBStoredProc.GetStoredProcedureNamesFromServer;
387	var
388	Query : TIBSQL;
389	begin
390	if not (csReading in ComponentState) then begin
391	ActivateConnection;
392	Database.InternalTransaction.StartTransaction;
393	Query := TIBSQL.Create(self);
394	try
395	Query.GoToFirstRecordOnExecute := False;
396	Query.Database := DataBase;
397	Query.Transaction := Database.InternalTransaction;
398	Query.SQL.Text := 'Select RDB$PROCEDURE_NAME from RDB$PROCEDURES'; {do not localize}
399	Query.Prepare;
400	Query.ExecQuery;
401	while (not Query.EOF) and (Query.Next <> nil) do
402	FNameList.Add(TrimRight(Query.Current.ByName('RDB$PROCEDURE_NAME').AsString)); {do not localize}
403	finally
404	Query.Free;
405	Database.InternalTransaction.Commit;
406	end;
407	end;
408	end;
409
410	procedure TIBStoredProc.SetParams;
411	var
412	i : integer;
413	j: integer;
414	begin
415	i := 0;
416	for j := 0 to FParams.Count - 1 do
417	begin
418	if (Params[j].ParamType <> ptInput) then
419	continue;
420	if not Params[j].Bound then
421	IBError(ibxeRequiredParamNotSet, [nil]);
422	if Params[j].IsNull then
423	SQLParams[i].IsNull := True
424	else begin
425	SQLParams[i].IsNull := False;
426	case Params[j].DataType of
427	ftString:
428	SQLParams[i].AsString := Params[j].AsString;
429	ftBoolean, ftSmallint, ftWord:
430	SQLParams[i].AsShort := Params[j].AsSmallInt;
431	ftInteger:
432	SQLParams[i].AsLong := Params[j].AsInteger;
433	{ ftLargeInt:
434	SQLParams[i].AsInt64 := Params[j].AsLargeInt; }
435	ftFloat, ftCurrency:
436	SQLParams[i].AsDouble := Params[j].AsFloat;
437	ftBCD:
438	SQLParams[i].AsCurrency := Params[j].AsCurrency;
439	ftDate:
440	SQLParams[i].AsDate := Params[j].AsDateTime;
441	ftTime:
442	SQLParams[i].AsTime := Params[j].AsDateTime;
443	ftDateTime:
444	SQLParams[i].AsDateTime := Params[j].AsDateTime;
445	ftBlob, ftMemo:
446	SQLParams[i].AsString := Params[j].AsString;
447	else
448	IBError(ibxeNotSupported, [nil]);
449	end;
450	end;
451	Inc(i);
452	end;
453	end;
454
455	procedure TIBStoredProc.SetParamsFromCursor;
456	var
457	I: Integer;
458	DataSet: TDataSet;
459	begin
460	if DataSource <> nil then
461	begin
462	DataSet := DataSource.DataSet;
463	if DataSet <> nil then
464	begin
465	DataSet.FieldDefs.Update;
466	for I := 0 to FParams.Count - 1 do
467	with FParams[I] do
468	if (not Bound) and
469	((ParamType = ptInput) or (ParamType = ptInputOutput)) then
470	AssignField(DataSet.FieldByName(Name));
471	end;
472	end;
473	end;
474
475	procedure TIBStoredProc.FetchDataIntoOutputParams;
476	var
477	i,j : Integer;
478	begin
479	j := 0;
480	for i := 0 to FParams.Count - 1 do
481	with Params[I] do
482	if ParamType = ptOutput then begin
483	Value := QSelect.Fields[j].Value;
484	Inc(j);
485	end;
486	end;
487
488	procedure TIBStoredProc.InternalOpen;
489	begin
490	IBError(ibxeIsAExecuteProcedure,[nil]);
491	end;
492
493	procedure TIBStoredProc.DefineProperties(Filer: TFiler);
494
495	function WriteData: Boolean;
496	begin
497	if Filer.Ancestor <> nil then
498	Result := not FParams.IsEqual(TIBStoredProc(Filer.Ancestor).FParams) else
499	Result := FParams.Count > 0;
500	end;
501
502	begin
503	inherited DefineProperties(Filer);
504	Filer.DefineProperty('ParamData', ReadParamData, WriteParamData, WriteData); {do not localize}
505	end;
506
507	procedure TIBStoredProc.WriteParamData(Writer: TWriter);
508	begin
509	Writer.WriteCollection(Params);
510	end;
511
512	procedure TIBStoredProc.ReadParamData(Reader: TReader);
513	begin
514	Reader.ReadValue;
515	Reader.ReadCollection(Params);
516	end;
517
518	end.