GitHub user heary-cao opened a pull request:
https://github.com/apache/spark/pull/18892
Improvement a special case for non-deterministic projects and 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 projects and filters. Deal with that we only need to read
user needs fields for non-deterministic projects and 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 non-deterministic
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18892.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 #18892
----
commit 1bc4fbfc5f123445995d1dfa0369f063a5f8ff6c
Author: caoxuewen <[email protected]>
Date: 2017-08-09T09:04:37Z
Improvement a special case for non-deterministic projects and filters in
optimizer
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