adriangb commented on PR #13795:
URL: https://github.com/apache/datafusion/pull/13795#issuecomment-2548934336

   Here's a breakdown of how the clauses evaluate before and after this PR.
   
   *Before*
   
   | row_count = null_count | predicate | outcome |
   |------------------------|-----------|---------|
   | null                   | null      | null    |
   | null                   | true      | true    |
   | null                   | false     | false   |
   | true                   | null      | false   |
   | true                   | true      | false   |
   | true                   | false     | false   |
   | false                  | null      | null    |
   | false                  | true      | true    |
   | false                  | false     | false   |
   
   *After*
   
   | row_count = null_count | row_count != null_count | predicate | outcome |
   |------------------------|-------------------------|-----------|---------|
   | null                   | null                    | null      | null    |
   | null                   | null                    | true      | null    |
   | null                   | null                    | false     | false   |
   | true                   | false                   | null      | false   |
   | true                   | false                   | true      | false   |
   | true                   | false                   | false     | false   |
   | false                  | true                    | null      | null    |
   | false                  | true                    | true      | true    |
   | false                  | true                    | false     | false   |
   
   The only change is for the case where `row_count = null_count` is null and 
the predicate is `true`: previously `true` would be returned but now `null` is 
returned. Since we interpret `null` as `true` the end result is the same. 


-- 
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.

To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org

For queries about this service, please contact Infrastructure at:
us...@infra.apache.org


---------------------------------------------------------------------
To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org
For additional commands, e-mail: github-h...@datafusion.apache.org

Reply via email to