GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/19867
[SPARK-22675] [SQL] Deduplicate PropagateTypes in TypeCoercion
## What changes were proposed in this pull request?
We do not need to call `PropagateTypes ` twice in the same batch. The
original changes in https://github.com/apache/spark/pull/5278 is not an issue
now. Thus, we can deduplicate it.
## How was this patch tested?
The existing test cases
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark deduplicatePropagateTypes
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19867.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 #19867
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commit fc3a24e039c905fdd263d2ece2088ce152887fc7
Author: gatorsmile <[email protected]>
Date: 2017-12-03T05:55:00Z
clean
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