Github user hvanhovell commented on a diff in the pull request: https://github.com/apache/spark/pull/11204#discussion_r52896251 --- Diff: sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/CatalystQlSuite.scala --- @@ -201,4 +201,13 @@ class CatalystQlSuite extends PlanTest { parser.parsePlan("select sum(product + 1) over (partition by (product + (1)) order by 2) " + "from windowData") } + + test("nesting UNION") { + parser.parsePlan("SELECT `u_1`.`id` FROM (((SELECT `t0`.`id` FROM `default`.`t0`) " + --- End diff -- Could you test the actual plan?
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