GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/18325
[SPARK-21119][SQL] unset table properties should keep the table comment
## What changes were proposed in this pull request?
Previous code mistakenly use `table.properties.get("comment")` to read the
existing table comment, we should use `table.comment`
## How was this patch tested?
new regression test
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark unset
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18325.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 #18325
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commit c84582aaf1f63969830905e71d8d07db000eb091
Author: Wenchen Fan <[email protected]>
Date: 2017-06-16T06:38:59Z
unset table properties should keep the table comment
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