maropu commented on issue #24049: [SPARK-27123][SQL] Improve CollapseProject to handle projects cross limit/repartition/sample URL: https://github.com/apache/spark/pull/24049#issuecomment-472204688 Sorry to be late; could you update the description of `CollapseProject` as follow-up? ``` /** * Combines two adjacent [[Project]] operators into one and perform alias substitution, * merging the expressions into one single expression. */ ``` Probably, it would be better to describe something about the new target this pr added. It seems `Project -> Sample -> Project` is not a case of adjacent projects?
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