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* to you under the Apache License, Version 2.0 (the
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package org.apache.cayenne.dba.derby;
import org.apache.cayenne.dba.JdbcAdapter;
import org.apache.cayenne.dba.oracle.OraclePkGenerator;
import org.apache.cayenne.map.DbEntity;
/**
* PK generator for Derby that uses sequences.
*
* @since 4.0 (old one used AUTO_PK_SUPPORT table)
*/
public class DerbyPkGenerator extends OraclePkGenerator {
DerbyPkGenerator(JdbcAdapter adapter) {
super(adapter);
}
@Override
protected String sequenceName(DbEntity entity) {
return super.sequenceName(entity).toUpperCase();
}
@Override
protected String selectNextValQuery(String pkGeneratingSequenceName) {
return "VALUES (NEXT VALUE FOR " + pkGeneratingSequenceName + ")";
}
@Override
protected String selectAllSequencesQuery() {
return "SELECT SEQUENCENAME FROM SYS.SYSSEQUENCES";
}
@Override
protected String dropSequenceString(DbEntity entity) {
return "DROP SEQUENCE " + sequenceName(entity) + " RESTRICT";
}
@Override
protected String createSequenceString(DbEntity entity) {
return "CREATE SEQUENCE " + sequenceName(entity) + " AS BIGINT START WITH " + pkStartValue +
" INCREMENT BY " + getPkCacheSize() + " NO MAXVALUE NO CYCLE";
}
}