dongjoon-hyun commented on a change in pull request #26837: [SPARK-30207][DOCS] Enhance the SQL NULL Semantics document URL: https://github.com/apache/spark/pull/26837#discussion_r356396398
########## File path: docs/sql-ref-null-semantics.md ########## @@ -668,6 +669,10 @@ To summarize, below are the rules for computing the result of an `IN` expression list does not contain NULL values - UNKNOWN is returned when the value is `NULL`, or the non-NULL value is not found in the list and the list contains at least one `NULL` value + +NOT IN always returns UNKNOWN when the list contains NULL, regardless of the input value. +This is because IN returns UNKNOWN if the value is not in the list, and because NOT UNKNOWN Review comment: ```not in the list -> not in the list containing `NULL` ```? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
