Github user jaceklaskowski commented on a diff in the pull request:
https://github.com/apache/spark/pull/18509#discussion_r125874046
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/EventTimeWatermarkExec.scala
---
@@ -81,7 +81,7 @@ class EventTimeStatsAccum(protected var currentStats:
EventTimeStats = EventTime
case class EventTimeWatermarkExec(
eventTime: Attribute,
delay: CalendarInterval,
- child: SparkPlan) extends SparkPlan {
+ child: SparkPlan) extends UnaryExecNode {
--- End diff --
I disagree that the simple change requires a JIRA since it's about making
the code more readable, but here it comes
anyway...https://issues.apache.org/jira/browse/SPARK-21329
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