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Java > Open Source Codes > com > mckoi > database > interpret > NoOp


1 /**
2  * com.mckoi.database.interpret.NoOp 14 Sep 2001
3  *
4  * Mckoi SQL Database ( http://www.mckoi.com/database )
5  * Copyright (C) 2000, 2001, 2002 Diehl and Associates, Inc.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * Version 2 as published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License Version 2 for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * Version 2 along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19  *
20  * Change Log:
21  *
22  *
23  */
24
25 package com.mckoi.database.interpret;
26
27 import com.mckoi.database.*;
28 import java.util.ArrayList JavaDoc;
29 import java.util.List JavaDoc;
30
31 /**
32  * A no operation statement.
33  *
34  * @author Tobias Downer
35  */
36
37 public class NoOp extends Statement {
38
39   // ---------- Implemented from Statement ----------
40
41   public void prepare() throws DatabaseException {
42     // Nothing to prepare
43 }
44
45   public Table evaluate() throws DatabaseException {
46     // No-op returns a result value of '0'
47 return FunctionTable.resultTable(new DatabaseQueryContext(database), 0);
48   }
49
50 }
51
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