ulysses-you commented on code in PR #40446:
URL: https://github.com/apache/spark/pull/40446#discussion_r1140038457
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala:
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@@ -128,10 +131,23 @@ class EquivalentExpressions {
// There are some special expressions that we should not recurse into all of
its children.
// 1. CodegenFallback: it's children will not be used to generate code
(call eval() instead)
// 2. ConditionalExpression: use its children that will always be
evaluated.
- private def childrenToRecurse(expr: Expression): Seq[Expression] = expr
match {
- case _: CodegenFallback => Nil
- case c: ConditionalExpression => c.alwaysEvaluatedInputs
- case other => other.children
+ private def childrenToRecurse(expr: Expression): Seq[Expression] = {
+ val alwaysEvaluated = expr match {
+ case _: CodegenFallback => Nil
+ case c: ConditionalExpression => c.alwaysEvaluatedInputs
+ case other => other.children
Review Comment:
oh, I see it. The actually root expression is `If` which is the
`ConditionalExpression`. Let me upadte it and the outdate test.
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