rdettai opened a new issue #992: URL: https://github.com/apache/arrow-datafusion/issues/992
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** Physical expressions should be aware of the rules on how to propagate statistics. For instance, for the row-wise max of two columns, the maximum statistics the maximum of the maximum of each input column. This would allow the `ProjectionExec` node to provide much better statistics. **Describe the solution you'd like** We should extend the `PhysicalExpr` with a method that handles statistics. **Describe alternatives you've considered** This could be implemented in the `ProjectionExec` with downcasting on various expression type. **Additional context** This is a follow up of #962 -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
