[GitHub] [arrow-rs] Dandandan opened a new issue, #4438: Equality kernel where null==null gives true

["Dandandan (via GitHub)" <gi...@apache.org>]

Dandandan opened a new issue, #4438:
URL: https://github.com/apache/arrow-rs/issues/4438

   **Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
   Some operations might need that `null==null` gives back `true` instead of null.
   
   https://github.com/apache/arrow-datafusion/pull/6724
   
   **Describe the solution you'd like**
   <!--
   A clear and concise description of what you want to happen.
   -->
   An equality kernel with null==null -> `true`. 
   
   **Describe alternatives you've considered**
   <!--
   A clear and concise description of any alternative solutions or features you've considered.
   -->
   In the PR https://github.com/apache/arrow-datafusion/pull/6724 an alternative implementation can be found:
   
   ```rust
               let eq: BooleanArray = eq_dyn(left, right)?;
   
               let left_is_null = is_null(left)?;
               let right_is_null = is_null(right)?;
   
               or_kleene(&and(&left_is_null, &right_is_null)?, &eq)
   ```
   
   **Additional context**
   <!--
   Add any other context or screenshots about the feature request here.
   -->
   


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[GitHub] [arrow-rs] tustvold closed issue #4438: Equality kernel where null==null gives true

["tustvold (via GitHub)" <gi...@apache.org>]

tustvold closed issue #4438: Equality kernel where null==null gives true 
URL: https://github.com/apache/arrow-rs/issues/4438


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[GitHub] [arrow-rs] tustvold commented on issue #4438: Equality kernel where null==null gives true

["tustvold (via GitHub)" <gi...@apache.org>]

tustvold commented on issue #4438:
URL: https://github.com/apache/arrow-rs/issues/4438#issuecomment-1683846514

   I believe this is the same as `IS NOT DISTINCT FROM`, I'll see what I can come up with


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[GitHub] [arrow-rs] tustvold commented on issue #4438: Equality kernel where null==null gives true

["tustvold (via GitHub)" <gi...@apache.org>]

tustvold commented on issue #4438:
URL: https://github.com/apache/arrow-rs/issues/4438#issuecomment-1686507525

   `label_issue.py` automatically added labels {'arrow'} from #4716


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