Minor Description
Currently `DynamicJoinSelection` has two features: 1.demote broadcast hash join, and 2.promote shuffled hash join. Both are achieved by adding join hint in query plan, and only works for equi join. However the rule is matching with `Join` operator now - https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/DynamicJoinSelection.scala#L71, so it would add hint for non-equi join by mistake.
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