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 <a href="http://www.h2database.com">H2 Database Engine</a>.
035 * @author Paul Ferraro
036 */
037@SuppressWarnings("nls")
038public class H2Dialect extends StandardDialect
039{
040        /**
041         * @see net.sf.hajdbc.dialect.StandardDialect#executeFunctionFormat()
042         */
043        @Override
044        protected String executeFunctionFormat()
045        {
046                return "CALL {0}";
047        }
048
049        /**
050         * @see net.sf.hajdbc.dialect.StandardDialect#getSequences(java.sql.DatabaseMetaData)
051         */
052        @Override
053        public Collection<QualifiedName> getSequences(DatabaseMetaData metaData) throws SQLException
054        {
055                List<QualifiedName> sequenceList = new LinkedList<QualifiedName>();
056                
057                Statement statement = metaData.getConnection().createStatement();
058                
059                ResultSet resultSet = statement.executeQuery("SELECT SEQUENCE_SCHEMA, SEQUENCE_NAME FROM INFORMATION_SCHEMA.SYSTEM_SEQUENCES");
060                
061                while (resultSet.next())
062                {
063                        sequenceList.add(new QualifiedName(resultSet.getString(1), resultSet.getString(2)));
064                }
065                
066                statement.close();
067                
068                return sequenceList;
069        }
070
071        /**
072         * Deferrability clause is not supported.
073         * @see net.sf.hajdbc.dialect.StandardDialect#createForeignKeyConstraintFormat()
074         */
075        @Override
076        protected String createForeignKeyConstraintFormat()
077        {
078                return "ALTER TABLE {1} ADD CONSTRAINT {0} FOREIGN KEY ({2}) REFERENCES {3} ({4}) ON DELETE {5,choice,0#CASCADE|1#RESTRICT|2#SET NULL|3#NO ACTION|4#SET DEFAULT} ON UPDATE {6,choice,0#CASCADE|1#RESTRICT|2#SET NULL|3#NO ACTION|4#SET DEFAULT}";
079        }
080
081        /**
082         * @see net.sf.hajdbc.dialect.StandardDialect#currentDatePattern()
083         */
084        @Override
085        protected String currentDatePattern()
086        {
087                return "(?<=\\W)CURRENT_DATE(?:\\s*\\(\\s*\\))?(?=\\W)|(?<=\\W)CURDATE\\s*\\(\\s*\\)|(?<=\\W)SYSDATE(?=\\W)|(?<=\\W)TODAY(?=\\W)";
088        }
089
090        /**
091         * @see net.sf.hajdbc.dialect.StandardDialect#currentTimePattern()
092         */
093        @Override
094        protected String currentTimePattern()
095        {
096                return "(?<=\\W)CURRENT_TIME(?:\\s*\\(\\s*\\))?(?=\\W)|(?<=\\W)CURTIME\\s*\\(\\s*\\)";
097        }
098
099        /**
100         * @see net.sf.hajdbc.dialect.StandardDialect#currentTimestampPattern()
101         */
102        @Override
103        protected String currentTimestampPattern()
104        {
105                return "(?<=\\W)CURRENT_TIMESTAMP(?:\\s*\\(\\s*\\d*\\s*\\))?(?=\\W)|(?<=\\W)NOW\\s*\\(\\s*\\d*\\s*\\)";
106        }
107
108        /**
109         * @see net.sf.hajdbc.dialect.StandardDialect#randomPattern()
110         */
111        @Override
112        protected String randomPattern()
113        {
114                return "(?<=\\W)RAND\\s*\\(\\s*\\d*\\s*\\)";
115        }
116}