francis0407 commented on a change in pull request #24344: [SPARK-27440][SQL]
Optimize uncorrelated predicate subquery
URL: https://github.com/apache/spark/pull/24344#discussion_r276538901
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File path: sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
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@@ -789,7 +789,7 @@ class CachedTableSuite extends QueryTest with SQLTestUtils
with SharedSQLContext
"""
|SELECT * FROM t1
|WHERE
- |NOT EXISTS (SELECT * FROM t1)
+ |NOT EXISTS (SELECT * FROM t1 as t2 WHERE t2.c1 = t1.c1)
Review comment:
I made this correlated so that it can be cached.
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