GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/22543
[SPARK-23715][SQL] improve document for from/to_utc_timestamp
## What changes were proposed in this pull request?
We have an agreement that the behavior of `from/to_utc_timestamp` is
corrected, although the function itself doesn't make much sense in Spark:
https://issues.apache.org/jira/browse/SPARK-23715
This PR improves the document.
## How was this patch tested?
N/A
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark doc
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22543.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 #22543
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commit b4d31f862ce7c09ebd9a431997dbc9edf4a2f6f3
Author: Wenchen Fan <wenchen@...>
Date: 2018-09-25T07:31:31Z
improve doc
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