GitHub user heary-cao opened a pull request:
https://github.com/apache/spark/pull/18918
[SQL]Improvement a special case for non-deterministic filters in optimizer
## What changes were proposed in this pull request?
Currently, Did a lot of special handling for non-deterministic projects and
filters in optimizer. but not good enough. this patch add a new special case
for non-deterministic filters. Deal with that we only need to read user needs
fields for non-deterministic filters in optimizer.
## How was this patch tested?
Should be covered existing test cases and add test cases.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/heary-cao/spark filters_non_deterministic
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18918.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 #18918
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commit 4216b6c18bcec447022cc9c1abee286766419316
Author: caoxuewen <cao.xue...@zte.com.cn>
Date: 2017-08-11T09:56:55Z
Improvement a special case for non-deterministic filters in optimizer
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