[
https://issues.apache.org/jira/browse/KYLIN-5787?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
pengfei.zhan resolved KYLIN-5787.
---------------------------------
Resolution: Fixed
> Use t-digest as spark percentile_approx function
> ------------------------------------------------
>
> Key: KYLIN-5787
> URL: https://issues.apache.org/jira/browse/KYLIN-5787
> Project: Kylin
> Issue Type: Improvement
> Components: Job Engine, Query Engine
> Affects Versions: 5.0-beta
> Reporter: pengfei.zhan
> Assignee: pengfei.zhan
> Priority: Critical
> Fix For: 5.0-beta
>
>
> The underlying implementation of the percentile_approx function in KYLIN is
> the open-source t-digest.
> The underlying implementation of the percentile_approx function in spark is
> spark's own PercentileDigest (based on QuantileSummaries).
> Different implementations lead to different results.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
