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https://issues.apache.org/jira/browse/HIVE-13260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15195623#comment-15195623
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Prasanth Jayachandran commented on HIVE-13260:
----------------------------------------------
+1
> ReduceSinkDeDuplication throws exception when pRS key is empty
> --------------------------------------------------------------
>
> Key: HIVE-13260
> URL: https://issues.apache.org/jira/browse/HIVE-13260
> Project: Hive
> Issue Type: Bug
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Attachments: HIVE-13260.01.patch, HIVE-13260.02.patch
>
>
> Steps to reproduce:
> {code}
> set hive.mapred.mode=nonstrict;
> set hive.cbo.enable=false;
> set hive.map.aggr=false;
> set hive.groupby.skewindata=false;
> set mapred.reduce.tasks=31;
> select
> compute_stats(a,16),compute_stats(b,16),compute_stats(c,16),compute_stats(d,16)
> from
> (
> select
> avg(DISTINCT substr(src.value,5)) as a,
> max(substr(src.value,5)) as b,
> variance(substr(src.value,5)) as c,
> var_samp(substr(src.value,5)) as d
> from src)subq;
> {code}
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