ulysses-you commented on issue #27235: [SPARK-30527][SQL] Add IsNotNull filter when use In, InSet and InSubQuery URL: https://github.com/apache/spark/pull/27235#issuecomment-575565262 Find the reason why test failed. `Not In` is quite complex. As `not-in-unit-tests-single-column.sql` say > -- Test cases for single-column ``WHERE a NOT IN (SELECT c FROM r ...)'': > -- | # | does subquery include null? | is a null? | a = c? | row with a included in result? | > -- | 1 | empty | | | yes | > -- | 2 | yes | | | no | > -- | 3 | no | yes | | no | > -- | 4 | no | no | yes | no | > -- | 5 | no | no | no | yes | Close this pr first and check offline if exists better way.
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