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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