Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/11190#discussion_r53562375
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/WholeStageCodegen.scala
---
@@ -73,9 +73,10 @@ trait CodegenSupport extends SparkPlan {
/**
* Returns Java source code to process the rows from upstream.
*/
- def produce(ctx: CodegenContext, parent: CodegenSupport): String = {
+ final def produce(ctx: CodegenContext, parent: CodegenSupport): String =
{
this.parent = parent
ctx.freshNamePrefix = variablePrefix
+ waitForSubqueries()
--- End diff --
why is this needed? shouldn't SparkPlan.execute already call
waitForSubqueries?
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