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Posted to dev@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2018/01/03 04:21:00 UTC

[jira] [Created] (HIVE-18361) Extend shared work optimizer to reuse computation beyond work boundaries

Jesus Camacho Rodriguez created HIVE-18361:
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             Summary: Extend shared work optimizer to reuse computation beyond work boundaries
                 Key: HIVE-18361
                 URL: https://issues.apache.org/jira/browse/HIVE-18361
             Project: Hive
          Issue Type: New Feature
          Components: Physical Optimizer
    Affects Versions: 3.0.0
            Reporter: Jesus Camacho Rodriguez
            Assignee: Jesus Camacho Rodriguez


Follow-up of the work in HIVE-16867.

HIVE-16867 introduced an optimization that identifies scans on input tables that can be merged and reuses the computation that is done in the work containing those scans. In particular, we traverse both parts of the plan upstream and reuse the operators if possible.
Currently, the optimizer will not go beyond the output edge(s) of that work. This extension removes that limitation.



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