Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/11190#discussion_r53545045
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/CatalystQlSuite.scala
---
@@ -201,4 +202,49 @@ class CatalystQlSuite extends PlanTest {
parser.parsePlan("select sum(product + 1) over (partition by (product
+ (1)) order by 2) " +
"from windowData")
}
+
+ test("subquery") {
+ comparePlans(
+ parser.parsePlan("select (select max(b) from s) ss from t"),
+ Project(
--- End diff --
@hvanhovell I'm going to remove these plan checking, it's very easy to
break. The details of plan does not mean much, we will have other tests to
verify the correctness.
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