[GitHub] [arrow-datafusion] mpurins-coralogix opened a new issue, #5610: Sort on cast expression removes cast

["mpurins-coralogix (via GitHub)" <gi...@apache.org>]

mpurins-coralogix opened a new issue, #5610:
URL: https://github.com/apache/arrow-datafusion/issues/5610

   **Describe the bug**
   I have found that under certain conditions casts are lost when there is a sort on expression with cast, and that could result in incorrect query results (for example if cast would be from string to integer).
   
   **To Reproduce**
   We hit this when building plan with `LogicalPlanBuilder` directly, but following sql will trigger this as well.
   
   Query `SELECT first_name AS first_name FROM (SELECT first_name AS first_name FROM person) ORDER BY CAST(first_name as INT)` gives us 
   ```
   Sort: first_name AS first_name ASC NULLS LAST
     Projection: first_name AS first_name
         Projection: person.first_name AS first_name
               TableScan: person
   ```
   
   **Expected behavior**
   Query above should give us something like 
   ```
   Sort: CAST(first_name AS Int32) ASC NULLS LAST
     Projection: first_name AS first_name
         Projection: person.first_name AS first_name
               TableScan: person
   ```
   
   **Additional context**
   <!--
   Add any other context about the problem here.
   -->
   


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[GitHub] [arrow-datafusion] alamb closed issue #5610: Sort on cast expression removes cast

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

alamb closed issue #5610: Sort on cast expression removes cast
URL: https://github.com/apache/arrow-datafusion/issues/5610


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