GitHub user zhzhan opened a pull request:
https://github.com/apache/spark/pull/16068
stateful udf should be nondeterministic
## What changes were proposed in this pull request?
Make stateful udf as nondeterministic
## How was this patch tested?
Mainly relies on existing queries. We also manually check the queries with
stateful udf in the filter. Without the patch, the udf is mistakenly pushdown
for efficiency. After the patch, the physical plan is generated correctly.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zhzhan/spark state
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16068.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 #16068
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commit a4d8b4af648e53c355bee16fe371137d0b349331
Author: Zhan Zhang <zhanzh...@fb.com>
Date: 2016-11-29T23:32:45Z
stateful udf should be nondeterministic
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