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Posted to dev@kylin.apache.org by howchoy <ch...@gmail.com> on 2017/01/01 04:35:50 UTC

Re: Anomaly in Aggregation

After further research, I think it's because the measure SELLER_CNT_HLL is
set to hll(10) (Error Rate < 9.75%). Please validate my finding. Thank you.


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Re: Anomaly in Aggregation

Posted by ShaoFeng Shi <sh...@apache.org>.

You're right Charles, the HLL result is approximate; If you want to get
accurate result, the "bitmap" count distinct measure can fulfill.

2017-01-01 12:35 GMT+08:00 howchoy <ch...@gmail.com>:

> After further research, I think it's because the measure SELLER_CNT_HLL is
> set to hll(10) (Error Rate < 9.75%). Please validate my finding. Thank you.
>
>
> --
> View this message in context: http://apache-kylin.74782.x6.
> nabble.com/Anomaly-in-Aggregation-tp6808p6809.html
> Sent from the Apache Kylin mailing list archive at Nabble.com.
>



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Best regards,

Shaofeng Shi 史少锋