Github user peter-toth commented on a diff in the pull request:
https://github.com/apache/spark/pull/22318#discussion_r215499599
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/AttributeMap.scala
---
@@ -23,12 +23,14 @@ package org.apache.spark.sql.catalyst.expressions
* of the name, or the expected nullability).
*/
object AttributeMap {
+ val empty = new AttributeMap(Map.empty)
--- End diff --
@gatorsmile this was the initial version. then came the idea of @mgaido91
and @maropu to use val (instead of def) either here or in ResolveReferences to
spare some empty() calls
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
