Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17935#discussion_r116906916
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala ---
@@ -631,13 +631,13 @@ class CachedTableSuite extends QueryTest with
SQLTestUtils with SharedSQLContext
val ds2 =
sql(
"""
- |SELECT * FROM (SELECT max(c1) FROM t1 GROUP BY c1)
+ |SELECT * FROM (SELECT max(c1) as c1 FROM t1 GROUP BY c1) t1
--- End diff --
can you pick another name? `t1` appeared twice...
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