Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16954#discussion_r103980267
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
---
@@ -1204,64 +1250,36 @@ class Analyzer(
// Category 1:
// BroadcastHint, Distinct, LeafNode, Repartition, and
SubqueryAlias
- case p: BroadcastHint =>
- p
- case p: Distinct =>
- p
- case p: LeafNode =>
- p
- case p: Repartition =>
- p
- case p: SubqueryAlias =>
- p
+ case _: BroadcastHint | _: Distinct | _: LeafNode | _: Repartition
| _: SubqueryAlias =>
// Category 2:
// These operators can be anywhere in a correlated subquery.
// so long as they do not host outer references in the operators.
case p: Sort =>
failOnOuterReference(p)
- p
case p: RepartitionByExpression =>
failOnOuterReference(p)
- p
// Category 3:
// Filter is one of the two operators allowed to host correlated
expressions.
// The other operator is Join. Filter can be anywhere in a
correlated subquery.
case f @ Filter(cond, child) =>
// Find all predicates with an outer reference.
- val (correlated, local) =
splitConjunctivePredicates(cond).partition(containsOuter)
+ val (correlated, local) =
+ splitConjunctivePredicates(cond).partition(containsOuter)
--- End diff --
`val (correlated, local) =
splitConjunctivePredicates(cond).partition(containsOuter)`
---
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