dongjoon-hyun commented on code in PR #55628:
URL: https://github.com/apache/spark/pull/55628#discussion_r3170374876
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
##########
@@ -6608,6 +6608,21 @@ object SQLConf {
.booleanConf
.createWithDefault(false)
+ val MERGE_SUBPLANS_FILTER_PROPAGATION_THROUGH_JOIN_ENABLED =
+ buildConf(
+
"spark.sql.optimizer.mergeSubplans.filterPropagation.filterPropagationThroughJoin.enabled")
+ .doc("When set to true, filter attributes can propagate through Join
nodes during subplan " +
+ "merging, allowing subplans that differ only in their filter
conditions and share a " +
+ "common join to be merged into a single scan. A filter attribute is
only propagated " +
+ "through a join when it originates from the non-nullable (preserved)
side: the left side " +
+ "of LeftOuter/LeftSemi/LeftAnti, the right side of RightOuter, or
either side of " +
Review Comment:
nit. `either side` -> `either side`
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