comphead commented on issue #17718: URL: https://github.com/apache/datafusion/issues/17718#issuecomment-3319652704
FYI CS Berkeley provides interesting selectivity defaults to deal with join orderings https://cs186berkeley.net/notes/note10/#appendix---selectivity-values Postgres has hardcoded values for selectivity like (if there is no stats involved) https://github.com/postgres/postgres/blob/master/src/include/utils/selfuncs.h#L34 I would be happy to join to investigate ``` The framework for [filter selectivity](https://docs.rs/datafusion/latest/datafusion/physical_expr/struct.AnalysisContext.html#structfield.selectivity) + join cardinality estimation. ``` -- 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]
