Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/6723#discussion_r32076997
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
---
@@ -89,6 +89,8 @@ case class UnresolvedFunction(name: String, children:
Seq[Expression]) extends E
throw new TreeNodeException(this, s"No function to evaluate
expression. type: ${this.nodeName}")
override def toString: String = s"'$name(${children.mkString(",")})"
+
+ override def checkInputDataTypes(): TypeCheckResult =
TypeCheckResult.TypeCheckSuccess
--- End diff --
why do they need to be the same?
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