viirya commented on code in PR #36491:
URL: https://github.com/apache/spark/pull/36491#discussion_r869701565
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
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@@ -1927,7 +1927,8 @@ object SQLConf {
val STATE_STORE_SKIP_NULLS_FOR_STREAM_STREAM_JOINS =
buildConf("spark.sql.streaming.stateStore.skipNullsForStreamStreamJoins.enabled")
.internal()
- .doc("When true, this config will skip null values in hash based
stream-stream joins.")
+ .doc("When true, this config will skip null values in hash based
stream-stream joins. " +
+ "The number of skipped null values will be shown as custom metric of
stream join operator.")
Review Comment:
It will be in `StateOperatorProgress`'s `customMetrics` too, as
`customStatefulOperatorMetrics`. So streaming query listener can access it too
besides UI.
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