Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19733#discussion_r151465775
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala
---
@@ -236,24 +236,34 @@ case class In(value: Expression, list:
Seq[Expression]) extends Predicate {
override def doGenCode(ctx: CodegenContext, ev: ExprCode): ExprCode = {
val valueGen = value.genCode(ctx)
val listGen = list.map(_.genCode(ctx))
+ ctx.addMutableState("boolean", ev.value, "")
+ ctx.addMutableState("boolean", ev.isNull, "")
--- End diff --
so we will create 2 mutable stats anyway?
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