GitHub user jinxing64 opened a pull request:
https://github.com/apache/spark/pull/19573
[SPARK-22350][SQL] select grouping__id from subquery
## What changes were proposed in this pull request?
Currently, sql below will fail:
```
SELECT cnt, k2, k3, grouping__id
FROM
(SELECT count as cnt, k2, k3, grouping__id
FROM t1
GROUP BY k2, k3
GROUPING SETS(k2, k3)) t2
```
The use case is common in our warehouse and supported hive now.
Could we support it?
## How was this patch tested?
Test added
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/jinxing64/spark SPARK-22350
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19573.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 #19573
----
commit c0ecbeea29c39091a7c1105afaa3741e28c19286
Author: jinxing <jinxing6...@126.com>
Date: 2017-10-24T13:18:56Z
select grouping__id from subquery
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