GitHub user dongjoon-hyun opened a pull request:
https://github.com/apache/spark/pull/14571
[SPARK-16983][SQL] Add `prettyName` for row_number, dense_rank,
percent_rank, cume_dist
## What changes were proposed in this pull request?
Currently, two-word window functions like `row_number`, `dense_rank`,
`percent_rank`, and `cume_dist` are expressed without `_` in error messages. We
had better show the correct names.
**Before**
```scala
scala> sql("select row_number()").show
java.lang.UnsupportedOperationException: Cannot evaluate expression:
rownumber()
```
**After**
```scala
scala> sql("select row_number()").show
java.lang.UnsupportedOperationException: Cannot evaluate expression:
row_number()
```
## How was this patch tested?
Manual.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dongjoon-hyun/spark SPARK-16983
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14571.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 #14571
----
commit 2c875dc3a6b761791651b6417631843bd360d91b
Author: Dongjoon Hyun <[email protected]>
Date: 2016-08-09T22:53:43Z
[SPARK-16983][SQL] Add `prettyName` for row_number, dense_rank,
percent_rank, cume_dist
```
scala> sql("select dense_rank()").show
java.lang.UnsupportedOperationException: Cannot evaluate expression:
denserank()
```
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