Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/10660#discussion_r49164404
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
---
@@ -803,6 +803,21 @@ class HiveQuerySuite extends HiveComparisonTest with
BeforeAndAfter {
assertResult(Array(Row(1))) {
sql("select 1 as a intersect select 1 as a").collect()
}
+ assertResult(Array(Row(1))) {
+ sql("(select 1 as a) intersect (select 1 as a)").collect()
--- End diff --
+1, these could be added into CatalystQlSuite
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