GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/20606
[SPARK-23421] [SQL] Document the behavior change in SPARK-22356
## What changes were proposed in this pull request?
https://github.com/apache/spark/pull/19579 introduces a behavior change. We
need to document it in the migration guide.
## How was this patch tested?
Also update the HiveExternalCatalogVersionsSuite to verify it.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark addMigrationGuide
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20606.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 #20606
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commit 02275a3d64dfa296a356bfd1aab609c7ba879366
Author: gatorsmile <gatorsmile@...>
Date: 2018-02-14T08:11:49Z
update
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