neilramaswamy commented on code in PR #44323:
URL: https://github.com/apache/spark/pull/44323#discussion_r1511719668
##########
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/StreamingSymmetricHashJoinHelper.scala:
##########
@@ -198,31 +198,52 @@ object StreamingSymmetricHashJoinHelper extends Logging {
val joinKeyOrdinalForWatermark: Option[Int] =
findJoinKeyOrdinalForWatermark(
leftKeys, rightKeys)
+ // Returns a predicate that drops data less than the state watermark.
+ // oneSideInputAttributes is the side from which state will be dropped,
while
+ // otherSideInputAttributes is the side on which a watermark must be
defined.
Review Comment:
```suggestion
```
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