Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/17186#discussion_r105806019
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -190,6 +190,15 @@ object SQLConf {
.booleanConf
.createWithDefault(false)
+ val CONSTRAINT_PROPAGATION_ENABLED =
buildConf("spark.sql.constraintPropagation.enabled")
+ .internal()
+ .doc("When true, the query optimizer will use constraint propagation
in query plans to " +
+ "perform optimization. Constraint propagation can be computation
expensive for long " +
--- End diff --
Thanks. Fixed.
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