Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18023#discussion_r124414653
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
---
@@ -123,7 +124,14 @@ case class UnresolvedAttribute(nameParts: Seq[String])
extends Attribute with Un
override def toString: String = s"'$name"
- override def sql: String = quoteIdentifier(name)
+ override def sql: String = {
+ name match {
+ case ParserUtils.escapedIdentifier(_) |
+ ParserUtils.qualifiedEscapedIdentifier(_, _) => name
--- End diff --
Nit: shorten it to one line
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