[
https://issues.apache.org/jira/browse/HIVE-16120?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jesus Camacho Rodriguez reassigned HIVE-16120:
----------------------------------------------
> Remove empty grouping sets restriction
> --------------------------------------
>
> Key: HIVE-16120
> URL: https://issues.apache.org/jira/browse/HIVE-16120
> Project: Hive
> Issue Type: Improvement
> Components: Parser
> Affects Versions: 2.2.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
>
> Queries with empty grouping sets, such as the following:
> {code:sql}
> SELECT a FROM T1 GROUP BY a GROUPING SETS (());
> {code}
> are not allowed in Hive. The restriction was added in HIVE-3471, together
> with some negative tests. However, the reason why this restriction is
> included is not described in the JIRA case, and the review board link (where
> there might be some additional information) does not work anymore. After
> running some tests myself, empty grouping sets seems to be working perfectly
> even when it is on its own; thus, it seems we could lift this restriction.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
