Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/23054#discussion_r234569150
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -1594,6 +1594,15 @@ object SQLConf {
"WHERE, which does not follow SQL standard.")
.booleanConf
.createWithDefault(false)
+
+ val LEGACY_ALIAS_NON_STRUCT_GROUPING_KEY =
+ buildConf("spark.sql.legacy.dataset.aliasNonStructGroupingKey")
--- End diff --
Maybe aliasNonStructGroupingKeyAsValue, and default to true.
Then we can remove this in the future.
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