alamb commented on pull request #1729: URL: https://github.com/apache/arrow-datafusion/pull/1729#issuecomment-1028915016
> @alamb Am I missing something by any chance? I had a thought this morning: what if we didn't introduce an `Aggregate` function at all, and instead simply rewrote queries so a query that has ```sql select approx_median(x) from foo; ``` could be rewritten to ```sql select approx_percentile(x, 5.0) as "approx_median(x)" from foo; ``` Similar to how we transform `SELECT count(distinct x) from foo` to `select count(*) from (select x from foo group by x)` in https://github.com/realno/arrow-datafusion/blob/add-median-operator/datafusion/src/optimizer/single_distinct_to_groupby.rs#L44 this may be a silly idea, but I wanted to write it down -- 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]
