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https://issues.apache.org/jira/browse/KYLIN-4992?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yaqian Zhang closed KYLIN-4992.
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Resolved in release 3.1.3 (2022-01-06)
> Source row count statistics calculated in a wrong way in MergeDictionaryMapper
> ------------------------------------------------------------------------------
>
> Key: KYLIN-4992
> URL: https://issues.apache.org/jira/browse/KYLIN-4992
> Project: Kylin
> Issue Type: Bug
> Affects Versions: v3.0.0, v2.6.2, v2.6.3, v3.1.0, v3.0.1, v3.0.2, v3.1.1,
> v3.1.2
> Reporter: Zhong Yanghong
> Assignee: JiangYang
> Priority: Critical
> Fix For: v3.1.3
>
>
> With this bug, source row count will be smaller than the correct one and it
> will result in smaller cuboid size estimation and smaller region number.
> Finally it will impact job and query performance.
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