Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22104#discussion_r239738437
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkOptimizer.scala ---
@@ -31,7 +31,8 @@ class SparkOptimizer(
override de
Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/22104#discussion_r239722680
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkOptimizer.scala ---
@@ -31,7 +31,8 @@ class SparkOptimizer(
override d