voidbag edited a comment on issue #24779: [SPARK-27929][SQL] Make percentile function receive frq of double URL: https://github.com/apache/spark/pull/24779#issuecomment-500340705 @dongjoon-hyun Replies 1. Benefits - This PR makes it possible to calculate percentile (linear interpolation over first argument in case of boundary), directly. - It's possible to accept frequency argument of double type - It's compatible with existing percentile function which used only integer as frequency 2. Work In Progress - **Its own unittest is not yet implemented** 3. I have executed `dev/scalastyle` 4. Other db engines don't seem to provide percentile function with **frequency**, unlike percentile aggregate function of catalyst package in Spark
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