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Posted to dev@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2013/10/26 03:38:31 UTC
[jira] [Updated] (HIVE-5658) count(distinct) produces confusing
results for null
[ https://issues.apache.org/jira/browse/HIVE-5658?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sergey Shelukhin updated HIVE-5658:
-----------------------------------
Description:
{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. This is with TopN disabled, so it is unrelated to the other bug
was:
{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
> 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. This is with TopN disabled, so it is unrelated to the other bug
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