From d7b9afed6cecbeb89916733039c0d2ee90127b3d Mon Sep 17 00:00:00 2001 From: lipzhu Date: Thu, 4 Jun 2020 17:33:24 +0800 Subject: [PATCH] enhance comments --- .../apache/spark/sql/catalyst/expressions/namedExpressions.scala | 1 + 1 file changed, 1 insertion(+) diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala index 77b4cecc263c7..2abd9d7bb4423 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala @@ -85,6 +85,7 @@ trait NamedExpression extends Expression { * e.g. top level attributes aliased in the SELECT clause, or column from a LocalRelation. * 2. Seq with a Single element: either the table name or the alias name of the table. * 3. Seq with 2 elements: database name and table name + * 4. Seq with 3 elements: catalog name, database name and table name */ def qualifier: Seq[String]