dbaliafroozeh commented on a change in pull request #32030:
URL: https://github.com/apache/spark/pull/32030#discussion_r609141398
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
##########
@@ -164,6 +164,9 @@ case class AggregateExpression(
case _ => aggFuncStr
}
}
+
+ override protected def withNewChildrenInternal(newChildren:
IndexedSeq[Expression]): Expression =
+ super.legacyWithNewChildren(newChildren)
Review comment:
Fixed it. Probably it makes sense to have a special node with nodes with
a child and an optional child. There are a number of some nodes. Manually
implementing them is tricky. I'd like to ideally only have to implement this
method like this:
```
override protected def withNewChildrenInternal(newChildren:
IndexedSeq[Expression]): Expression =
copy(children = newChildren)
```
That is, only for nodes with a list of children. We'll do these tweaks in a
followup.
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