GitHub user dongjoon-hyun opened a pull request:
https://github.com/apache/spark/pull/14048
[SPARK-16370][SQL] Union queries with side effects should be executed
eagerly
## What changes were proposed in this pull request?
Currently, some queries having side effects like `Command`,
`InsertIntoTable`, and `CreateTableUsingAsSelect` are executed eagerly.
However, for `UNION` queries, they are executed only in `UNION ALL` queries
with all children having side effects.
This issue executes them eagerly for both `UNION` and `UNION ALL` queries
if one of their children has side effects.
## How was this patch tested?
Pass the Jenkins tests with a new testcase.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dongjoon-hyun/spark SPARK-16370
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14048.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 #14048
----
commit e59c3d12a945575776f99f0766adb54a90bd2cf1
Author: Dongjoon Hyun <dongj...@apache.org>
Date: 2016-07-04T21:42:32Z
[SPARK-16370][SQL] Union queries with side effects should be executed
eagerly
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