2010YOUY01 commented on issue #19487: URL: https://github.com/apache/datafusion/issues/19487#issuecomment-3695393329
> One thought since I'm working on the topic: how would you propose we handle struct columns? As far as I know Parquet does populate statistics for struct column leaves but DataFusion's statistics / pruning only knows how to handle top-level columns. Now, I plan to build this statistics propagation feature with the existing `PruningStatistics` https://github.com/apache/datafusion/blob/6ce237492d9f75477c594ba132b2575932122dd6/datafusion/common/src/pruning.rs#L63 Is it the case this trait can't populate stats for individual struct columns? Is it possible to extend `PruningStatistics` for it? And the later propagation steps should be able to handle them. -- 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]
