code: @Override
    public TableSchema getResultSetMetadata(OperationHandle opHandle)
        throws HiveSQLException {
      TableSchema tableSchema = sessionManager.getOperationManager()
          .getOperation(opHandle).getParentSession().getResultSetMetadata(opHandle);
      LOG.debug(opHandle + ": getResultSetMetadata()");
      return tableSchema;
    }
docs: /* (non-Javadoc)
  @see org.apache.hive.service.cli.ICLIService#getResultSetMetadata(org.apache.hive.service.cli.OperationHandle)