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Posted to dev@hive.apache.org by "Laljo John Pullokkaran (JIRA)" <ji...@apache.org> on 2015/11/06 01:07:27 UTC

[jira] [Created] (HIVE-12356) Capture if a rule mutated the plan.

Laljo John Pullokkaran created HIVE-12356:
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             Summary: Capture if a rule mutated the plan.
                 Key: HIVE-12356
                 URL: https://issues.apache.org/jira/browse/HIVE-12356
             Project: Hive
          Issue Type: Bug
    Affects Versions: 1.2.0
            Reporter: Laljo John Pullokkaran
            Assignee: Laljo John Pullokkaran


Currently Hive Optimizer doesn't capture if a rule mutated the plan.
This info could be useful in:
1. determining if a subsequent optimization rule needs to be run or not
   (Ex if Constant propagation didn't mutate plan, then don't run subsequent PPD)
2. Explain can contain info about which optimizations are applied effectively on the query.



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