/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.dialect;
/**
* An SQL dialect for DB2/400. This class provides support for DB2 Universal Database for iSeries,
* also known as DB2/400.
*
* @author Peter DeGregorio (pdegregorio)
*/
public class DB2400Dialect extends DB2Dialect {
public boolean supportsSequences() {
return false;
}
public String getIdentitySelectString() {
return "select identity_val_local() from sysibm.sysdummy1";
}
public boolean supportsLimit() {
return true;
}
public boolean supportsLimitOffset() {
return false;
}
public boolean useMaxForLimit() {
return true;
}
public boolean supportsVariableLimit() {
return false;
}
public String getLimitString(String sql, int offset, int limit) {
if ( offset > 0 ) {
throw new UnsupportedOperationException( "query result offset is not supported" );
}
if ( limit == 0 ) {
return sql;
}
return new StringBuffer( sql.length() + 40 )
.append( sql )
.append( " fetch first " )
.append( limit )
.append( " rows only " )
.toString();
}
}