MysqlMetaData


1   /*
2    * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3    *
4    * This file is part of Resin(R) Open Source
5    *
6    * Each copy or derived work must preserve the copyright notice and this
7    * notice unmodified.
8    *
9    * Resin Open Source is free software; you can redistribute it and/or modify
10   * it under the terms of the GNU General Public License as published by
11   * the Free Software Foundation; either version 2 of the License, or
12   * (at your option) any later version.
13   *
14   * Resin Open Source is distributed in the hope that it will be useful,
15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17   * of NON-INFRINGEMENT.  See the GNU General Public License for more
18   * details.
19   *
20   * You should have received a copy of the GNU General Public License
21   * along with Resin Open Source; if not, write to the
22   *   Free SoftwareFoundation, Inc.
23   *   59 Temple Place, Suite 330
24   *   Boston, MA 02111-1307  USA
25   *
26   * @author Scott Ferguson
27   */
28  
29  package com.caucho.jdbc;
30  
31  import com.caucho.util.Log;
32  
33  import javax.sql.DataSource  ;
34  import java.util.logging.Logger  ;
35  
36  /**
37   * Metadata for the MySQL database.
38   */
39  public class MysqlMetaData extends JdbcMetaData {
40    private static final Logger   log = Log.open(MysqlMetaData.class);
41  
42    protected MysqlMetaData(DataSource   ds)
43    {
44      super(ds);
45    }
46  
47    /**
48     * Returns true if identity is supported.
49     */
50    public boolean supportsIdentity()
51    {
52      return true;
53    }
54  
55    /**
56     * Returns the identity property
57     */
58    public String   createIdentitySQL(String   sqlType)
59    {
60      return sqlType + " auto_increment";
61    }
62  
63    /**
64     * Returns a limit.
65     */
66    public String   limit(String   sql, int limit)
67    {
68      if (limit < 0)
69        return sql;
70      else
71        return sql + " LIMIT " + limit;
72    }
73  }
74
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