Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/19175#discussion_r140719222
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -481,6 +481,13 @@ object SQLConf {
.booleanConf
.createWithDefault(true)
+ val GROUPING_WITH_UNION = buildConf("spark.sql.grouping.union.enabled")
+ .doc("When true, the grouping analytics (i.e., cube, rollup, grouping
sets) will be " +
+ "implemented by Union with a number of aggregates for each group. " +
--- End diff --
`implemented using a union with aggregates for each group.`
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