Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17175#discussion_r105101933
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Canonicalize.scala
---
@@ -43,6 +43,12 @@ object Canonicalize extends {
case _ => e
}
+ /** Remove some unnecessary parameters. */
+ private[expressions] def ignoreParameters(e: Expression): Expression = e
match {
--- End diff --
we can just put this logic in `ignoreNamesTypes` and rename it.
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