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https://issues.apache.org/jira/browse/HIVE-13260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15190128#comment-15190128
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Prasanth Jayachandran commented on HIVE-13260:
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Can you add explain to the test case with RS dedup enable and disabled?
Also in the patch, you are copying the number of distribution keys from cRS but
not the fields. I suspect that. We might need a test run to see if that breaks
anything.
> 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
>
>
> 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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