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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2020/02/10 01:03:36 UTC
[GitHub] [spark] maropu commented on issue #27436: [SPARK-30705][SQL]
Improve CaseWhen sub-expression equality
maropu commented on issue #27436: [SPARK-30705][SQL] Improve CaseWhen sub-expression equality
URL: https://github.com/apache/spark/pull/27436#issuecomment-583918059
Is it worth covering more cases in CaseWhen there? Based on [the code comment](https://github.com/apache/spark/blob/b877aac14657832d1b896ea57e06b0d0fd15ee01/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala#L83-L88), covering more cases could have some overheads to to compute equality of expr trees?
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