Karl-WangSK commented on a change in pull request #29360:
URL: https://github.com/apache/spark/pull/29360#discussion_r466129980
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
##########
@@ -2690,6 +2690,19 @@ object SQLConf {
.booleanConf
.createWithDefault(true)
+
+ val GROUPING_WITH_UNION = buildConf("spark.sql.optimizer.grouping")
+ .doc("When true,enable grouping with union.")
+ .booleanConf
+ .createWithDefault(false)
+
+ val GROUPING_EXPAND_PROJECTIONS =
buildConf("spark.sql.optimizer.projections.size")
+ .doc("Split a expand into several smallExpand,which contains the size of
projections.It can" +
+ "reduce the shuffle pressure and improve performance in multidimensional
analysis " +
+ "when data is huge.")
+ .intConf
+ .createWithDefault(4)
Review comment:
ok!
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