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Java > Open Source Codes > com > mckoi > database > TQueryPlanType


1 /**
2  * com.mckoi.database.TQueryPlanType 26 Jul 2002
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;
26
27 /**
28  * An implementation of TType for a query plan value.
29  *
30  * @author Tobias Downer
31  */
32
33 public class TQueryPlanType extends TType {
34
35   static final long serialVersionUID = -1122548450083929179L;
36
37   /**
38    * Constructs the type.
39    */
40   public TQueryPlanType() {
41     // There is no SQL type for a query plan node so we make one up here
42 super(-19443);
43   }
44
45   public boolean comparableTypes(TType type) {
46     throw new Error JavaDoc("Query Plan types should not be compared.");
47   }
48   
49   public int compareObs(Object JavaDoc ob1, Object JavaDoc ob2) {
50     throw new Error JavaDoc("Query Plan types should not be compared.");
51   }
52
53   public int calculateApproximateMemoryUse(Object JavaDoc ob) {
54     return 5000;
55   }
56
57   public Class JavaDoc javaClass() {
58     return QueryPlanNode.class;
59   }
60
61 }
62
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