/*****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
****************************************************************/
package org.apache.cayenne.dba.h2;
import org.apache.cayenne.dba.JdbcAdapter;
import org.apache.cayenne.dba.oracle.OraclePkGenerator;
import org.apache.cayenne.map.DbEntity;
/**
* Default PK generator for H2 that uses sequences for PK generation.
*
* @since 4.0
*/
public class H2PkGenerator extends OraclePkGenerator {
protected H2PkGenerator(JdbcAdapter adapter) {
super(adapter);
}
@Override
protected String createSequenceString(DbEntity ent) {
return "CREATE SEQUENCE " + sequenceName(ent) + " START WITH " + pkStartValue + " INCREMENT BY "
+ pkCacheSize(ent) + " CACHE 1";
}
@Override
protected String selectNextValQuery(String sequenceName) {
return "SELECT NEXT VALUE FOR " + sequenceName;
}
@Override
protected String selectAllSequencesQuery() {
return "SELECT LOWER(sequence_name) FROM Information_Schema.Sequences";
}
}