viirya commented on issue #25717: [WIP][SPARK-29013][SQL] Structurally equivalent subexpression elimination URL: https://github.com/apache/spark/pull/25717#issuecomment-529169833 Thanks @maropu @mgaido91 For sub-expression elimination, I observed that many similar functions generated are only different in input slots. So this works for BoundReference. For BoundReference, we can parameterize the ordinals out of generated functions to achieve this feature. I think it is probably very hard to generalize this.
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