cloud-fan commented on code in PR #40742:
URL: https://github.com/apache/spark/pull/40742#discussion_r1163509684
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala:
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@@ -1430,6 +1430,10 @@ object InferFiltersFromConstraints extends
Rule[LogicalPlan]
.union(constructIsNotNullConstraints(constraints, plan.output))
.filter { c =>
c.references.nonEmpty && c.references.subsetOf(plan.outputSet) &&
c.deterministic
+ }.filterNot {
+ // Avoid once strategy idempotence is broken.
+ case a EqualNullSafe b => a.semanticEquals(b)
Review Comment:
can we fix the place that generates this useless predicate?
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