Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/22364#discussion_r216303304
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/AttributeSet.scala
---
@@ -39,10 +41,15 @@ object AttributeSet {
/** Constructs a new [[AttributeSet]] given a sequence of [[Expression
Expressions]]. */
def apply(baseSet: Iterable[Expression]): AttributeSet = {
- new AttributeSet(
- baseSet
- .flatMap(_.references)
- .map(new AttributeEquals(_)).toSet)
--- End diff --
ah, ok. can you rename `fromAttributeSets` -> `apply`, and then change the
mutable set?
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