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Posted to dev@hive.apache.org by "Remus Rusanu (JIRA)" <ji...@apache.org> on 2017/04/13 18:31:41 UTC

[jira] [Created] (HIVE-16438) Support inclusive sort order on ReduceDink deduplication

Remus Rusanu created HIVE-16438:
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             Summary: 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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