Haisheng Yuan created CALCITE-4018:
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Summary: Implement trait propagation for EnumerableValues
Key: CALCITE-4018
URL: https://issues.apache.org/jira/browse/CALCITE-4018
Project: Calcite
Issue Type: Improvement
Components: core
Reporter: Haisheng Yuan
Only passThrough is needed.
Currently, when Values is created, it will enumerate all the possible
collations no matter parent operator requires it or not, it will be a disaster
if the Values has thousands of columns, and the parent operator may be just a
hash aggregate or hashjoin, which doesn't care about its collation.
The collation should be created on demand by calling passThrough.
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