docs: protected static boolean checkTableExist(Jdbc jdbc, String tableName) {
  		String sql = "select 1 from " + tableName + " limit 1;";
  		try {
  			jdbc.queryForInt(sql);
  			return true;
  		}
  		catch (BadSqlGrammarException e) {
  			return false;
  		}
  
  	}