01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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: *
23: * Free Software Foundation, Inc.
24: * 59 Temple Place, Suite 330
25: * Boston, MA 02111-1307 USA
26: *
27: * @author Sam
28: */
29:
30: package com.caucho.jdbc;
31:
32: import javax.sql.DataSource;
33:
34: /**
35: * Metadata for the Apache Derby database.
36: */
37: public class DerbyMetaData extends GenericMetaData {
38: protected DerbyMetaData(DataSource ds) {
39: super (ds);
40: }
41:
42: /**
43: * Returns the literal for FALSE.
44: */
45: public String getFalseLiteral() {
46: return "0";
47: }
48:
49: /**
50: * Returns true if the POSITION function is supported.
51: */
52: public boolean supportsPositionFunction() {
53: return false;
54: }
55:
56: /**
57: * True if the generated keys is supported
58: */
59: public boolean supportsGetGeneratedKeys() {
60: return true;
61: }
62:
63: public boolean supportsIdentity() {
64: return true;
65: }
66:
67: public String createIdentitySQL(String sqlType) {
68: return sqlType + " GENERATED ALWAYS AS IDENTITY";
69: }
70:
71: public boolean supportsSequences() {
72: // http://issues.apache.org/jira/browse/DERBY-712
73: return false;
74: }
75:
76: public String selectSequenceSQL(String name) {
77: throw new UnsupportedOperationException();
78: }
79:
80: public String createSequenceSQL(String name, int size) {
81: throw new UnsupportedOperationException();
82: }
83: }
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