Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/11658#discussion_r56274664
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
---
@@ -185,8 +185,7 @@ case class Alias(child: Expression, name: String)(
override def sql: String = {
val qualifiersString =
if (qualifiers.isEmpty) "" else
qualifiers.map(quoteIdentifier).mkString("", ".", ".")
- val aliasName = if (isGenerated) s"$name#${exprId.id}" else s"$name"
--- End diff --
`isGenerated` is still needed to avoid resolving column names on these
generated internal attributes. However, it should not affect the `sql` anymore,
as this PR need to control the format of attribute names and alias names.
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