Jesus Camacho Rodriguez created HIVE-9636:
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Summary: Apply IdentityProjectRemover after other optimizations
Key: HIVE-9636
URL: https://issues.apache.org/jira/browse/HIVE-9636
Project: Hive
Issue Type: Bug
Reporter: Jesus Camacho Rodriguez
Assignee: Jesus Camacho Rodriguez
IdentityProjectRemove optimizer may remove some Project operators that change
the table alias for the input columns; this might cause optimizations such as
StatsOptimizer, that rely on colExprMap and consequently store table aliases,
to behave incorrectly.
To avoid this, we could apply IdentityProjectRemove optimization after all the
rest have been previously applied, and document it accordingly.
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