try {
conn = DbConnectionFactory.getDataSource().getConnection();
conn.setAutoCommit(false);
if(DbConnectionFactory.isMySql()){
dc.executeStatement("SET storage_engine=INNODB", conn);
}else if(DbConnectionFactory.isMsSql()){
dc.executeStatement("SET TRANSACTION ISOLATION LEVEL READ COMMITTED;", conn);
}
for (String query : schemaList) {