Github user dongjoon-hyun commented on the issue: https://github.com/apache/spark/pull/13876 For this `OptimizeIn` example, we need `list.forall(_.deterministic) && (ExpressionSet(list) < conf_min_value || ExpressionSet(list) < list.size)` would be one candidate for `lazy val`. It means we need to access SQLConf in Expression. Previously, I remember that it was not possible for `OptimizeCodegen` case.
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