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Posted to dev@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2013/10/26 03:38:30 UTC
[jira] [Commented] (HIVE-5658) count(distinct) produces confusing
results for null
[ https://issues.apache.org/jira/browse/HIVE-5658?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13805936#comment-13805936 ]
Sergey Shelukhin commented on HIVE-5658:
----------------------------------------
[~hagleitn] are you the owner of all things null? :)
> count(distinct) produces confusing results for null
> ---------------------------------------------------
>
> Key: HIVE-5658
> URL: https://issues.apache.org/jira/browse/HIVE-5658
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
>
> {code}
> select csmallint, count(distinct(csmallint)) from alltypesorc group by csmallint limit 3;
> {code}
> produces:
> {noformat}
> NULL 0
> -16379 1
> -16373 1
> {noformat}
> There are records in table with NULL values; however the count in this case should be 1, not 0, it seems
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