[
https://issues.apache.org/jira/browse/HIVE-15397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15733796#comment-15733796
]
Sergey Shelukhin edited comment on HIVE-15397 at 12/9/16 12:21 AM:
-------------------------------------------------------------------
For now, I'm disabling the setting by default and adding safety for the common
case.
[~ashutoshc] [~pxiong] can you take a look? I filed HIVE-15398 to follow up,
will update the descriptions in both shortly
was (Author: sershe):
For now, disable the setting by default and add safety for the common case.
[~ashutoshc] [~pxiong] can you take a look? I filed HIVE-15398 to follow up,
will update the descriptions in both shortly
> metadata-only queries may return incorrect results with empty tables
> --------------------------------------------------------------------
>
> Key: HIVE-15397
> URL: https://issues.apache.org/jira/browse/HIVE-15397
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-15397.patch
>
>
> Queries like select 1=1 from t group by 1=1 may return rows, based on
> OneNullRowInputFormat, even if the source table is empty. For now, add some
> basic detection of empty tables and turn this off by default (since we can't
> know whether a table is empty or not based on there being some files, without
> reading them).
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
