GitHub user sameeragarwal opened a pull request:
https://github.com/apache/spark/pull/14815
[SPARK-17244] Catalyst should not pushdown non-deterministic join conditions
## What changes were proposed in this pull request?
Given that non-deterministic expressions can be stateful, pushing them down
the query plan during the optimization phase can cause incorrect behavior. This
patch fixes that issue by explicitly disabling that.
## How was this patch tested?
A new test in `FilterPushdownSuite` that checks catalyst behavior for both
deterministic and non-deterministic join conditions.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sameeragarwal/spark constraint-inputfile
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14815.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 #14815
----
commit 95150970d7e5a71d9271a209a8ee453ce20f8097
Author: Sameer Agarwal <[email protected]>
Date: 2016-08-24T19:37:33Z
Joins should not pushdown non-deterministic conditions
commit 6728fc31bab1fd53e1005f892496ec61b6d22cd0
Author: Sameer Agarwal <[email protected]>
Date: 2016-08-25T20:45:32Z
unit test
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