Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/11822#discussion_r56810267
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
---
@@ -197,9 +197,9 @@ case class Alias(child: Expression, name: String)(
* @param metadata The metadata of this attribute.
* @param exprId A globally unique id used to check if different
AttributeReferences refer to the
* same attribute.
- * @param qualifiers A list of strings that can be used to referred to
this attribute in a fully
- * qualified way. Consider the examples tableName.name,
subQueryAlias.name.
- * tableName and subQueryAlias are possible qualifiers.
+ * @param qualifier A list of strings that can be used to referred to this
attribute in a fully
--- End diff --
update the comment here too.
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