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https://issues.apache.org/jira/browse/HIVE-18361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesus Camacho Rodriguez updated HIVE-18361:
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Status: Patch Available (was: In Progress)
> 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
> Labels: TODOC3.0
>
> 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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