Jesus Camacho Rodriguez created HIVE-20744:
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Summary: Use SQL constraints to improve join reordering algorithm
Key: HIVE-20744
URL: https://issues.apache.org/jira/browse/HIVE-20744
Project: Hive
Issue Type: Bug
Components: CBO
Reporter: Jesus Camacho Rodriguez
Assignee: Jesus Camacho Rodriguez
Till now, it was all based on stats stored for the base tables and their
columns. Now the optimizer can rely on constraints. Hence, this patch is for
the join reordering costing to use constraints, and if it does not find any,
rely on old code path.
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