[I] Collect filter selectivity [arrow-rs]

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

avantgardnerio opened a new issue, #8723:
URL: https://github.com/apache/arrow-rs/issues/8723

   **Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
   I would like to collect stats on how selective my filters are for databasey reasons.
   
   **Describe the solution you'd like**
   Something like this: https://github.com/coralogix/arrow-rs/blob/53eb05b142df31dfb89b02194f09d78f3f467ca2/parquet/src/arrow/arrow_reader/mod.rs#L640
   
   **Describe alternatives you've considered**
   I am open to other options
   
   **Additional context**
   <!--
   Add any other context or screenshots about the feature request here.
   -->
   


-- 
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: github-unsubscribe@arrow.apache.org.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org

Re: [I] Collect filter selectivity [arrow-rs]

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

alamb commented on issue #8723:
URL: https://github.com/apache/arrow-rs/issues/8723#issuecomment-3453192509

   I wonder if we could extend https://docs.rs/parquet/latest/parquet/arrow/arrow_reader/metrics/enum.ArrowReaderMetrics.html somehow to capture the effective selectivity of filter evalution


-- 
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: github-unsubscribe@arrow.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org