code: @Override
    public OperationHandle getColumns(SessionHandle sessionHandle, String catalogName,
        String schemaName, String tableName, String columnName) throws HiveSQLException {
      return cliService.getColumns(sessionHandle, catalogName, schemaName, tableName, columnName);
    }
docs: /* (non-Javadoc)
  @see org.apache.hive.service.cli.CLIServiceClient#getColumns(org.apache.hive.service.cli.SessionHandle, java.lang.String, java.lang.String, java.lang.String, java.lang.String)