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https://issues.apache.org/jira/browse/KYLIN-5000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17355439#comment-17355439
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Yaqian Zhang commented on KYLIN-5000:
-------------------------------------
Hi：
Can you provide comparison screenshots or logs of the results of two queries
and duplicate data?
> kylin query分页多次请求间返回结果有重复
> -------------------------
>
> Key: KYLIN-5000
> URL: https://issues.apache.org/jira/browse/KYLIN-5000
> Project: Kylin
> Issue Type: Task
> Components: Query Engine
> Affects Versions: v3.1.1
> Reporter: star_dev
> Priority: Major
>
> 请以分页形式分多次请求kylin查询时，如第一次
> SELECT 分组条件, COUNT (1) as kkk FROM table
> WHERE 过滤条件
> GROUP BY 分组条件
> LIMIT 1000 OFFSET 0
> 第二次
> SELECT 分组条件, COUNT (1) as kkk FROM table
> WHERE 过滤条件
> GROUP BY 分组条件
> LIMIT 1000 OFFSET 1000
> 两次查询的结果有重复数据
>
> 但当执行
> SELECT 分组条件, COUNT (1) as kkk FROM table
> WHERE 过滤条件
> GROUP BY 分组条件
> LIMIT 1000 OFFSET 0
> union
> SELECT 分组条件, COUNT (1) as kkk FROM table
> WHERE 过滤条件
> GROUP BY 分组条件
> LIMIT 1000 OFFSET 1000
> 时，返回了2000条不重复的数据
>
> 问题：
> # 当以分页形式分别独立请求kylin查询时，为何不同的请求间会有重复数据？
> # 当以union 形式请求kylin查询时，能按照需求返回不重复的满足条数的数据，和1有什么不同吗？
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