HeartSaVioR commented on a change in pull request #33081:
URL: https://github.com/apache/spark/pull/33081#discussion_r670174122
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
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@@ -1610,6 +1610,26 @@ object SQLConf {
.checkValue(v => Set(1, 2).contains(v), "Valid versions are 1 and 2")
.createWithDefault(2)
+ val STREAMING_SESSION_WINDOW_MERGE_SESSIONS_IN_LOCAL_PARTITION =
+
buildConf("spark.sql.streaming.sessionWindow.merge.sessions.in.local.partition")
Review comment:
As I explained on the doc method, this would incur additional "logical
sort", so only useful when there're lots of input rows which are going to be
consolidated into same session. The benefit is dependent on the characteristic
of data.
If we want to pick one between two to simplify, it would be probably safer
to remove local aggregation.
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