cloud-fan commented on a change in pull request #34070:
URL: https://github.com/apache/spark/pull/34070#discussion_r716487286
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/dynamicpruning/PartitionPruning.scala
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@@ -225,16 +230,6 @@ object PartitionPruning extends Rule[LogicalPlan] with
PredicateHelper with Join
}.isDefined
}
- /**
- * To be able to prune partitions on a join key, the filtering side needs to
- * meet the following requirements:
- * (1) it can not be a stream
- * (2) it needs to contain a selective predicate used for filtering
Review comment:
IIUC, the eventual goal is to make sure the "filtering side" is small.
How do you guarantee it without selective predicates?
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