Github user wzhfy commented on a diff in the pull request:
https://github.com/apache/spark/pull/16594#discussion_r96589910
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -649,6 +649,14 @@ object SQLConf {
.doubleConf
.createWithDefault(0.05)
+ val SHOW_STATS_IN_EXPLAIN =
--- End diff --
It's invalidated by default because stats info can be inaccurate (and in
some cases very inaccurate), and can confuse regular users. At current stage
it's better to be a feature for administrators and developers to see how cbo
behaves in estimation. So I make the flag "internal".
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