GitHub user PenguinToast opened a pull request:
https://github.com/apache/spark/pull/21832
[SPARK-24879][SQL] Fix NPE in Hive partition pruning filter pushdown
## What changes were proposed in this pull request?
We get a NPE when we have a filter on a partition column of the form `col
in (x, null)`. This is due to the filter converter in HiveShim not handling
`null`s correctly. This patch fixes this bug while still pushing down as much
of the partition pruning predicates as possible, by filtering out `null`s from
any `in` predicate. Since Hive only supports very simple partition pruning
filters, this change should preserve correctness.
## How was this patch tested?
Unit tests, manual tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/PenguinToast/spark partition-pruning-npe
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21832.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 #21832
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commit 388caa978ead4bb8957b5e41a20c394fc90fe234
Author: William Sheu <william.sheu@...>
Date: 2018-07-20T18:41:27Z
Filter out `null` values for partition pruning predicates
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