Jefffrey opened a new issue, #20151: URL: https://github.com/apache/datafusion/issues/20151
### Is your feature request related to a problem or challenge? For MapArray we seem to hash all child values even if we slice only a subset: https://github.com/apache/datafusion/blob/b80bf2ca8ef74900fee96a1cc169bdedf53b36fc/datafusion/common/src/hash_utils.rs#L483-L485 Consider optimizing this to hash only the needed child values, similar to what #19500 does For union arrays, specifically sparse arrays, we hash all values of each child array: https://github.com/apache/datafusion/blob/b80bf2ca8ef74900fee96a1cc169bdedf53b36fc/datafusion/common/src/hash_utils.rs#L611-L619 Consider optimizing to hash only the needed values ### Describe the solution you'd like _No response_ ### Describe alternatives you've considered Don't do these if regresses performance (or no noticeable impact) ### Additional context _No response_ -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
