Github user ioana-delaney commented on a diff in the pull request:
https://github.com/apache/spark/pull/17546#discussion_r110314369
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -736,6 +736,12 @@ object SQLConf {
.checkValue(weight => weight >= 0 && weight <= 1, "The weight value
must be in [0, 1].")
.createWithDefault(0.7)
+ val JOIN_REORDER_DP_STAR_FILTER =
--- End diff --
@viirya Star join plans are expected to have an optimal execution based on
their referential integrity constraints among the tables. It is a good
heuristic. I expect that once CBO is enabled by default, star joins will also
be enabled.
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