Github user rberenguel commented on a diff in the pull request:
https://github.com/apache/spark/pull/17100#discussion_r146468977
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
---
@@ -270,12 +270,25 @@ trait CheckAnalysis extends PredicateHelper {
operator match {
case o if o.children.nonEmpty && o.missingInput.nonEmpty =>
+ val resolver = plan.conf.resolver
+ val attrsWithSameName = o.missingInput.filter { missing =>
+ o.inputSet.exists(input => resolver(missing.name,
input.name))
+ }
+ val repeatedNameHint = if (attrsWithSameName.nonEmpty) {
+ val commonNames = attrsWithSameName.map(_.name).mkString(",")
--- End diff --
Done
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