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

["Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-18361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jesus Camacho Rodriguez reassigned HIVE-18361:
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> 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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