Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/13494
Hi @lianhuiwang , thanks for working on it, looks pretty good! Some
suggestions about the strategy:
1. instead of handling `Distinct`, I think we can expand the optimizable
cases in `Aggregate`, to also support `SELECT col FROM tbl GROUP BY col`.
2. instead of traversing the plan tree and collect project list and filter
conditions, I think we can replace the table relation with `LogicalRDD` of
partition values and keep the `Filter` and `Project` operators.
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