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}