viirya commented on a change in pull request #35574:
URL: https://github.com/apache/spark/pull/35574#discussion_r814502749
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
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@@ -407,6 +407,18 @@ object SQLConf {
.booleanConf
.createWithDefault(true)
+ val REQUIRE_ALL_CLUSTER_KEYS_FOR_DISTRIBUTION =
+ buildConf("spark.sql.requireAllClusterKeysForDistribution")
+ .internal()
+ .doc("When true, the planner requires all the clustering keys as the
partition keys " +
+ "(with same ordering) of the children, to eliminate the shuffle for
the operator that " +
+ "requires its children be clustered distributed, such as AGGREGATE and
WINDOW node. " +
+ "This is to avoid data kews which can lead to significant performance
regression if " +
Review comment:
typo: kews -> skews
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