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Posted to issues@kylin.apache.org by "yangwei (JIRA)" <ji...@apache.org> on 2018/11/20 03:03:00 UTC

[jira] [Created] (KYLIN-3696) TOPN度量在同一个模型下2个cube同时开启统计值不准与真实值差得较多

yangwei created KYLIN-3696:
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             Summary: TOPN度量在同一个模型下2个cube同时开启统计值不准与真实值差得较多
                 Key: KYLIN-3696
                 URL: https://issues.apache.org/jira/browse/KYLIN-3696
             Project: Kylin
          Issue Type: Bug
          Components: Measure - TopN
    Affects Versions: v2.5.1
            Reporter: yangwei
         Attachments: image-2018-11-20-10-57-28-546.png, image-2018-11-20-11-01-25-120.png

我使用的是v2.5.1,度量topN使用上出现不准的总量。

问题再现:

一,二个cube使用同一个模型就是同一张物理事实表。

二,二个cube同时包含相同的topN度量

三,二个cube状态都是Ready

目前我暂时的解决方法是在其中一个cube去掉一个topN度量

同一个sql在hive与kylin里查的的结果对不上相差很远,下面给出sql

SELECT IP ,
 SUM(ACCESS_COUNT) c
FROM API_ACCESS
WHERE TAG_DATE = CAST('2018-11-19' AS DATE)
 group by ip
ORDER BY 
 c DESC
LIMIT 10;

二个cube中的度量:

 cube1:

!image-2018-11-20-10-57-28-546.png!

cube2:

!image-2018-11-20-11-01-25-120.png!



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