GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/18340
[SPARK-21132] [SQL] DISTINCT modifier of function arguments should not be
silently ignored
### What changes were proposed in this pull request?
We should not silently ignore `DISTINCT` when they are not supported in the
function arguments. This PR is to block these cases and issue the error
messages.
### How was this patch tested?
Added test cases for both regular functions and window functions
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark firstCount
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18340.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 #18340
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commit 350852ded1038ea80ed505d29d1ce238c4864778
Author: Xiao Li <gatorsm...@gmail.com>
Date: 2017-06-18T02:29:28Z
fix.
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