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https://issues.apache.org/jira/browse/HIVE-18711?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16363359#comment-16363359
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Ashutosh Chauhan commented on HIVE-18711:
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References:
https://docs.microsoft.com/en-us/sql/t-sql/functions/percentile-cont-transact-sql
[https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions110.htm]
https://www.postgresql.org/docs/9.4/static/functions-aggregate.html
> Add percentile_cont and percentile_disc udaf
> --------------------------------------------
>
> Key: HIVE-18711
> URL: https://issues.apache.org/jira/browse/HIVE-18711
> Project: Hive
> Issue Type: Bug
> Components: UDF
> Reporter: Ashutosh Chauhan
> Priority: Major
>
> Most common way to implement this is via ordered aggregate which allows users
> to specify sort specification with group by clause. Some implementations also
> allow to use these with window functions.
> Since Hive doesn't have concept of ordered aggregates yet, one possibility is
> to support these only for window functions where sort specification is also
> taken from window clause.
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