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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2020/10/09 11:30:38 UTC

[GitHub] [spark] maropu commented on a change in pull request #29983: [SPARK-13860][SQL] change stddev_samp and var_samp to return 0.0 instead of Double.NaN to align with TPCDS standard.

maropu commented on a change in pull request #29983:
URL: https://github.com/apache/spark/pull/29983#discussion_r502364642



##########
File path: sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
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@@ -2775,6 +2775,16 @@ object SQLConf {
       .booleanConf
       .createWithDefault(false)
 
+  val LEGACY_CENTRAL_MOMENT_AGG_BEHAVIOR =
+    buildConf("spark.sql.legacy.centralMomentAgg.enabled")

Review comment:
       Could you update the migration guide, too?




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