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From zuyu <...@git.apache.org>
Subject [GitHub] incubator-quickstep pull request #354: Fixed the union-all elimiation case w...
Date Tue, 08 May 2018 05:04:20 GMT
GitHub user zuyu opened a pull request:

    https://github.com/apache/incubator-quickstep/pull/354

    Fixed the union-all elimiation case where some project expression is not an AttributeReference.

    This PR fixed for the case where the only one child of the union-all query is non-empty,
and the child has a non-AttributeReference project expression:
    
    ```
    SELECT 1 AS a FROM not_empty
    UNION ALL
    SELECT 0 AS a FROM empty;
    ```

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

    $ git pull https://github.com/zuyu/incubator-quickstep eliminate-empty-node-bug-fix

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

    https://github.com/apache/incubator-quickstep/pull/354.patch

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

    This closes #354
    
----
commit f7d1132672f4ef6399dbbe77541f93911c2d640b
Author: Zuyu Zhang <zuyu@...>
Date:   2018-05-08T04:58:35Z

    Fixed the union-all elimiation case where some project expression is not an AttributeReference.

----


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