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From "sunjincheng (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-5695) Optimize table type systems based on database semantics
Date Wed, 01 Feb 2017 15:44:51 GMT
sunjincheng created FLINK-5695:
----------------------------------

             Summary: Optimize table type systems based on database semantics
                 Key: FLINK-5695
                 URL: https://issues.apache.org/jira/browse/FLINK-5695
             Project: Flink
          Issue Type: Sub-task
          Components: Table API & SQL
            Reporter: sunjincheng
            Assignee: sunjincheng


Optimize table type systems based on database semantics.As follows:
             groupBy
         -------------------->
Table                             GroupedTable
  ∧   <--------------------           ∧
   |         select&agg                |
   |                                           |
   | where                                |
   | select                                | groupBy
   | agg                                    |
   | ...                                       |
   |             window                  |
  ∨     --------------------->     
 Table                            WindowedTable
          <---------------------
              select&over
So, I want remove  table Type "WindowGroupedTable".



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