GitHub user windpiger opened a pull request:
https://github.com/apache/spark/pull/15766
[SPARK-18271][SQL]hash udf in HiveSessionCatalog.hiveFunctions is redundant
## What changes were proposed in this pull request?
when lookupfunction in HiveSessionCatalog, first look up in spark's
build-in functionRegistry, if it not existed, then look up the Hive'S build-in
functions which are listed in Seq(hiveFunctions).
But the [hash] function is already in spark's build-in functionRegistry
list, so it will never to go to look up in Hive's hiveFunctions list, so the
[hash] function which is in Hive's hiveFunctions is redundant, we can remove it.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/windpiger/spark removeudfreduntant
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15766.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 #15766
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commit c3a0389311fb78e5fc985d937280f3e957562498
Author: root <root@izbp1gsnrlfzjxh82cz80vz.(none)>
Date: 2016-11-04T11:39:19Z
[SPARK-18271][SQL]hash udf in HiveSessionCatalog.hiveFunctions is redundant
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