code: public boolean requiresQuotingSqlType(int sqlType) throws SQLException {
      switch (sqlType) {
        case Types.BIGINT:
        case Types.DOUBLE:
        case Types.FLOAT:
        case Types.INTEGER:
        case Types.REAL:
        case Types.SMALLINT:
        case Types.TINYINT:
        case Types.NUMERIC:
        case Types.DECIMAL:
          return false;
      }
      return true;
    }
docs: Returns true if particular sqlType requires quoting.
  This method is used internally by the driver, so it might disappear without notice.
  
  @param sqlType sql type as in java.sql.Types
  @return true if the type requires quoting
  @throws SQLException if something goes wrong