Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/10762#discussion_r50801765
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
---
@@ -164,11 +164,42 @@ case class Join(
left.output.map(_.withNullability(true)) ++ right.output
case FullOuter =>
left.output.map(_.withNullability(true)) ++
right.output.map(_.withNullability(true))
+ case NaturalJoin(jt) =>
+ outerProjectList(jt).map(_.toAttribute)
case _ =>
left.output ++ right.output
}
}
+ def outerProjectList(jt: JoinType): Seq[NamedExpression] = {
--- End diff --
also i'm not 100% sure, but i suspect if we make resolve false when the
plan is natural join type, then we can just move this function into the
analyzer. it really doesn't belong in the join node itself.
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