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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/05/18 20:27:41 UTC
[GitHub] [spark] dongjoon-hyun commented on issue #24593: [SPARK-27692][SQL]
Add new optimizer rule to evaluate the deterministic scala udf only once if
all inputs are literals
dongjoon-hyun commented on issue #24593: [SPARK-27692][SQL] Add new optimizer rule to evaluate the deterministic scala udf only once if all inputs are literals
URL: https://github.com/apache/spark/pull/24593#issuecomment-493704947
Since SPARK-27761 is created, can we reduce the focus on the optimizer again? Actually, `override def foldable` will be the simplest, but if we need to provide this optionally, a separate optimizer proposed in this PR will be the most feasible approach (without touching `ScalaUDF` and the existing optimizers like `ConstantFolding`.)
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