Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/12720#discussion_r61520052
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/subquery.scala
---
@@ -38,20 +38,24 @@ abstract class SubqueryExpression extends Expression {
*/
def plan: QueryPlan[_]
- /**
- * Updates the query with new logical plan.
- */
+ /** Updates the query with new logical plan. */
def withNewPlan(plan: LogicalPlan): SubqueryExpression
+
+ /** The correlated conditions that connects the sub-query to its parent
query. */
+ def conditions: Seq[Expression]
--- End diff --
= Seq.empty ?
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