peter-toth commented on code in PR #32298:
URL: https://github.com/apache/spark/pull/32298#discussion_r844000300
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala:
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@@ -615,4 +603,23 @@ object QueryPlan extends PredicateHelper {
case e: AnalysisException => append(e.toString)
}
}
+
+ /**
+ * Extracts expressions from an object.
+ */
+ def extractExpressions(o: Any): Seq[Expression] = {
Review Comment:
It is only required for the current general node merging code path. If we
drop that then we don't need to extract this function.
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