nvander1 edited a comment on issue #24761: [SPARK-27905] [SQL] Add higher order function 'forall' URL: https://github.com/apache/spark/pull/24761#issuecomment-516963973 I think this summarizes the expected behavior for forall with three valued logic: ``` /* * true for all non null elements foundNull result * F F F * F T F * T F T * T T N */ ``` And this is captured by the following check ``` if (foundNull && forall) { null } else { forall } ``` What do you think?
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