001/*
002 * HA-JDBC: High-Availability JDBC
003 * Copyright (c) 2004-2007 Paul Ferraro
004 * 
005 * This library is free software; you can redistribute it and/or modify it 
006 * under the terms of the GNU Lesser General Public License as published by the 
007 * Free Software Foundation; either version 2.1 of the License, or (at your 
008 * option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful, but WITHOUT
011 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
012 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License 
013 * for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public License
016 * along with this library; if not, write to the Free Software Foundation, 
017 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
018 * 
019 * Contact: ferraro@users.sourceforge.net
020 */
021package net.sf.hajdbc.dialect;
022
023import java.sql.DatabaseMetaData;
024import java.sql.ResultSet;
025import java.sql.SQLException;
026import java.sql.Statement;
027import java.util.Collection;
028import java.util.LinkedList;
029import java.util.List;
030
031import net.sf.hajdbc.QualifiedName;
032
033/**
034 * Dialect for DB2 (commercial).
035 * @author  Paul Ferraro
036 * @since   1.1
037 */
038@SuppressWarnings("nls")
039public class DB2Dialect extends StandardDialect
040{
041        /**
042         * @see net.sf.hajdbc.dialect.StandardDialect#executeFunctionFormat()
043         */
044        @Override
045        protected String executeFunctionFormat()
046        {
047                return "VALUES {0}";
048        }
049
050        /**
051         * @see net.sf.hajdbc.dialect.StandardDialect#getSequences(java.sql.DatabaseMetaData)
052         */
053        @Override
054        public Collection<QualifiedName> getSequences(DatabaseMetaData metaData) throws SQLException
055        {
056                List<QualifiedName> sequenceList = new LinkedList<QualifiedName>();
057                
058                Statement statement = metaData.getConnection().createStatement();
059                
060                ResultSet resultSet = statement.executeQuery("SELECT SEQSCHEMA, SEQNAME FROM SYSCAT.SEQUENCES");
061                
062                while (resultSet.next())
063                {
064                        sequenceList.add(new QualifiedName(resultSet.getString(1), resultSet.getString(2)));
065                }
066                
067                statement.close();
068                
069                return sequenceList;
070        }
071
072        /**
073         * @see net.sf.hajdbc.dialect.StandardDialect#sequencePattern()
074         */
075        @Override
076        protected String sequencePattern()
077        {
078                return "(?:NEXT|PREV)VAL\\s+FOR\\s+'?([^',\\s\\(\\)]+)";
079        }
080
081        /**
082         * @see net.sf.hajdbc.dialect.StandardDialect#nextSequenceValueFormat()
083         */
084        @Override
085        protected String nextSequenceValueFormat()
086        {
087                return "NEXTVAL FOR {0}";
088        }
089
090        /**
091         * @see net.sf.hajdbc.dialect.StandardDialect#dateLiteralFormat()
092         */
093        @Override
094        protected String dateLiteralFormat()
095        {
096                return this.timestampLiteralFormat();
097        }
098
099        /**
100         * @see net.sf.hajdbc.dialect.StandardDialect#timeLiteralFormat()
101         */
102        @Override
103        protected String timeLiteralFormat()
104        {
105                return this.timestampLiteralFormat();
106        }
107
108        /**
109         * @see net.sf.hajdbc.dialect.StandardDialect#timestampLiteralFormat()
110         */
111        @Override
112        protected String timestampLiteralFormat()
113        {
114                return "''{0}''";
115        }
116}