ASF GitHub Bot commented on TRAFODION-3021:

GitHub user traflm opened a pull request:


    [TRAFODION-3021] union, intersect, except should be cacheable

    Make UNION, INTERSECT, EXCEPT cacheable.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/traflm/trafodion TRAFODION-3021

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1518
commit e2b9a66d92f63e01f897f1ca1d7f3a6801a52756
Author: Liu Ming <ovis_poly@...>
Date:   2018-04-14T02:13:53Z

    [TRAFODION-3021] union, intersect, except should be cacheable


> set operator not cacheable
> --------------------------
>                 Key: TRAFODION-3021
>                 URL: https://issues.apache.org/jira/browse/TRAFODION-3021
>             Project: Apache Trafodion
>          Issue Type: Task
>            Reporter: liu ming
>            Assignee: liu ming
>            Priority: Major
> select * from t1
> union all
> select * from t2
> This query cannot be cached.
> Should be cacheable.

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