GitHub user wangyum opened a pull request:
https://github.com/apache/spark/pull/18330
[SPARK-20749][SQL][FOLLOWUP] Support character_length
## What changes were proposed in this pull request?
The function `char_length` is shorthand for `character_length` function.
Both Hive and Postgresql support `character_length`, This PR add support for
`character_length`.
Ref:
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-StringFunctions
https://www.postgresql.org/docs/current/static/functions-string.html
## How was this patch tested?
unit tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/wangyum/spark SPARK-20749-character_length
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18330.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 #18330
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commit 2fbf9e2558e05bef1fe066bd8d11b62ff53f7023
Author: Yuming Wang <[email protected]>
Date: 2017-06-16T15:40:25Z
Add alias character_length.
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