DataSource ds = amberPersistenceUnit.getDataSource();
Connection conn = ds.getConnection();
try {
JdbcMetaData metaData = amberPersistenceUnit.getMetaData();
_selectSQL = metaData.selectSequenceSQL(_name);
if (amberPersistenceUnit.getCreateDatabaseTables()) {
String sql = metaData.createSequenceSQL(_name, getGroupSize());
try {