Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/5480#discussion_r28365081
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
---
@@ -414,6 +414,10 @@ class SQLQuerySuite extends QueryTest with
BeforeAndAfterAll {
sql("with q1 as (select * from testData limit 10) select * from q1"),
testData.take(10).toSeq)
+ intercept[RuntimeException] {
+ sql("with q1 as (select * from testData) with q2 as (select * from
q1) select * from q2")
--- End diff --
I see. It was not clear to me from the description that the goal was to
prevent this. Make this its own test, and call it something like `allow only a
single with clause per query`.
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