@Override
  public String getSchemaTerm() throws SQLException {
    return "";
  }
some tools pass in parameters that will escape '_', but some syntax does not support escaping,
such as dataGrip

@param pattern eg. information\_schema
@return eg. information_schema
iotdb-client/jdbc/src/main/java/org/apache/iotdb/jdbc/relational/IoTDBRelationalDatabaseMetadata.java