Jesus Camacho Rodriguez created HIVE-16602:
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Summary: Implement shared scans with Tez
Key: HIVE-16602
URL: https://issues.apache.org/jira/browse/HIVE-16602
Project: Hive
Issue Type: New Feature
Components: Physical Optimizer
Affects Versions: 3.0.0
Reporter: Jesus Camacho Rodriguez
Assignee: Jesus Camacho Rodriguez
Given a query plan, the goal is to identify scans on input tables that can be
merged so the data is read only once. Optimization will be carried out at the
physical level.
In the longer term, identification of equivalent expressions and reutilization
of intermediary results should be done at the logical layer via Spool operator.
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