Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/11190#discussion_r53545735
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -88,7 +88,19 @@ abstract class Optimizer extends
RuleExecutor[LogicalPlan] {
Batch("Decimal Optimizations", FixedPoint(100),
DecimalAggregates) ::
Batch("LocalRelation", FixedPoint(100),
- ConvertToLocalRelation) :: Nil
+ ConvertToLocalRelation) ::
+ Batch("Subquery", Once,
+ Subquery) :: Nil
+ }
+
+ /**
+ * Optimize all the subqueries inside expression.
+ */
+ object Subquery extends Rule[LogicalPlan] {
+ def apply(plan: LogicalPlan): LogicalPlan = plan
transformAllExpressions {
+ case subquery: SubqueryExpression =>
+ subquery.withNewPlan(execute(subquery.query))
--- End diff --
where is execute coming from?
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