Github user nongli commented on a diff in the pull request:
https://github.com/apache/spark/pull/10073#discussion_r46342777
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
---
@@ -133,6 +132,38 @@ object ExtractEquiJoinKeys extends Logging with
PredicateHelper {
}
/**
+ * A pattern that collects the filter and inner joins.
--- End diff --
Is it much more work to extract all the filters? For example if there is a
filter after the inner join of input and plan 1
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