[jira] [Created] (TAJO-167) Implement GeneralSetFunctionExpr to represent with all SQL standard set functions.

["Hyunsik Choi (JIRA)" <ji...@apache.org>]

Hyunsik Choi created TAJO-167:
---------------------------------

             Summary: Implement GeneralSetFunctionExpr to represent with all SQL standard set functions.
                 Key: TAJO-167
                 URL: https://issues.apache.org/jira/browse/TAJO-167
             Project: Tajo
          Issue Type: Improvement
          Components: planner/optimizer
            Reporter: Hyunsik Choi
            Assignee: Hyunsik Choi
             Fix For: 0.2-incubating


This patch removes CountValueFunctionExpr and add GeneralSetFunctionExpr corresponding to general_set_function of SQL 2003 BNF (http://savage.net.au/SQL/sql-2003-2.bnf.html#general set function).

After this patch, we should use GeneralSetFunctionExpr to represent all SQL standard aggregation functions (e.g., max, min, avg, sum, stddev_pop, stddev_samp andg so on).

Also, GeneralSetFunctionExpr has an attribute for distinct keyword that set functions can have.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira