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https://issues.apache.org/jira/browse/HIVE-16438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Remus Rusanu reassigned HIVE-16438:
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> Support inclusive sort order on ReduceDink deduplication
> --------------------------------------------------------
>
> Key: HIVE-16438
> URL: https://issues.apache.org/jira/browse/HIVE-16438
> Project: Hive
> Issue Type: Bug
> Components: Query Planning
> Reporter: Remus Rusanu
> Assignee: Remus Rusanu
>
> HIVE-11132, HIVE-12664 and HIVE-15708 hit issues around the
> ReduceSinkDeDuplicate logic. The patch for HIVE-15708 forces the sort order
> of all reduced operators to be the same, disallowing for allowance of less
> restrictive sort in parent RS operators that are covered by the more
> restrictive child RS operator. Logically this condition should be allowed,
> ie. child operator sorts by {{(A, B, C)}} and parent sorts by {{(A,B)}} it
> should be merged. This is the JIRA to track that work.
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