neilramaswamy commented on code in PR #44323:
URL: https://github.com/apache/spark/pull/44323#discussion_r1566227605
##########
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/StreamingSymmetricHashJoinHelper.scala:
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@@ -218,11 +222,27 @@ object StreamingSymmetricHashJoinHelper extends Logging {
attributesToFindStateWatermarkFor =
AttributeSet(oneSideInputAttributes),
attributesWithEventWatermark =
AttributeSet(otherSideInputAttributes),
condition,
- eventTimeWatermarkForEviction)
- val inputAttributeWithWatermark =
oneSideInputAttributes.find(_.metadata.contains(delayKey))
- val expr = watermarkExpression(inputAttributeWithWatermark,
stateValueWatermark)
- expr.map(JoinStateValueWatermarkPredicate.apply _)
+ eventTimeWatermarkForEviction
+ )
+
+ val attributesInCondition = AttributeSet(
+ condition.get.collect { case a: AttributeReference => a }
Review Comment:
Comment added.
No, the hierarchy is:
```
Attribute --> AttributeReference --> ColumnarAttributeReference
|
| --> PrettyAttribute (used only for debugging)
```
So it's safe to just use an `AttributeReference` in the collect. We also do
this when we generate the state value watermark predicate:
https://github.com/apache/spark/blob/f3a6ca9e2c476fe418679f82b0c5148d69d0fbda/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/StreamingJoinHelper.scala#L139
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