You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2016/12/09 00:15:58 UTC

[jira] [Updated] (HIVE-15397) metadata-only queries may return incorrect results with empty tables

     [ https://issues.apache.org/jira/browse/HIVE-15397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Shelukhin updated HIVE-15397:
------------------------------------
    Summary: metadata-only queries may return incorrect results with empty tables  (was: metadata-only queries may return incorrect results with empty tables - I)

> 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)