Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/5744#discussion_r29314881
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
---
@@ -203,5 +210,5 @@ case class UnresolvedGetField(child: Expression,
fieldName: String) extends Unar
override def eval(input: Row = null): EvaluatedType =
throw new TreeNodeException(this, s"No function to evaluate
expression. type: ${this.nodeName}")
- override def toString: String = s"$child.$fieldName"
+ override def toString: String = s"$child.getField($fieldExpr)"
--- End diff --
to make it shorter, maybe just "$child[$fieldExpr]".
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