Startrekzky commented on issue #4651: URL: https://github.com/apache/incubator-devlake/issues/4651#issuecomment-1467335791
Hi @julianolsdominguesTW Good catch. It seems `_find_clt_rank_each_month` and `_clt` are two equivalent temp tables, we should get rid of one. The idea of `_clt` is to get the median(not mean) change lead time for each month. Since MySQL doesn't support an aggregate function like median(), we have to first percent_rank() all records, and then find out the 50th percentile value (the value of the record with the biggest rank that <= 0.5). I hope it answers your question. -- 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]
