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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