shrirangmhalgi commented on PR #56056:
URL: https://github.com/apache/spark/pull/56056#issuecomment-4520805176
@cloud-fan - Thanks for the thorough explanation. You're right that
`df("col") === 0` only constrains one side, making L.col ≠ R.col. I incorrectly
assumed foldable meant symmetric. The ambiguity is real and the rule is correct
to flag it. Closing this PR. The right direction is aligning the single-pass
resolver to also reject this case.
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