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https://issues.apache.org/jira/browse/KYLIN-4184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16975726#comment-16975726
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Gang Ma commented on KYLIN-4184:
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Nice catch! I just try to reduce the array copy times to improve the
performance, and cause this issue. I will add some ut for this case, also try
to reduce unnecessary array copy in other way.
> Real time OLAP query gets wrong result
> --------------------------------------
>
> Key: KYLIN-4184
> URL: https://issues.apache.org/jira/browse/KYLIN-4184
> Project: Kylin
> Issue Type: Bug
> Components: Real-time Streaming
> Affects Versions: v3.0.0-beta
> Reporter: wangxiaojing
> Assignee: wangxiaojing
> Priority: Blocker
> Fix For: v3.0.0-beta
>
> Attachments: image-2019-09-30-13-54-13-312.png
>
>
> * 1、Kylin RT OLAP query error，sometimes result count more than right
> ,sometimes less than right;
> * 2、Kylin RT OLAP query error，some dimissions content error,
> eg:minute_start,hour_start；
> * query sql
> {code:java}
> select MINUTE_START, EVENTCODE as NAME, RUNTIME, TASKID, count(1) as CNT from
> TASK_SNAPSHOT
> where MINUTE_START >= '2019-09-25 18:32:00' and MINUTE_START<='2019-09-25
> 18:33:00'
> and EVENTCODE = 'faceAntispam'
> group by MINUTE_START, EVENTCODE, RUNTIME, TASKID order by RUNTIME desc{code}
> content error result
> !image-2019-09-30-13-54-13-312.png!
> * item error result
> {code:java}
> #this sql can get result with 132 items
> select MINUTE_START, EVENTCODE as NAME, RUNTIME, TASKID, count(1) as CNT from
> TASK_SNAPSHOT
> where MINUTE_START = '2019-09-25 18:32:00' --and MINUTE_START<='2019-09-25
> 18:33:00'
> and EVENTCODE = 'faceAntispam'
> group by MINUTE_START, EVENTCODE, RUNTIME, TASKID order by RUNTIME desc{code}
>
> {code:java}
> #this sql can get result with no items ,it get the error result ,the rigth
> result it's 132 items
> select MINUTE_START, EVENTCODE as NAME, RUNTIME, TASKID, count(1) as CNT from
> TASK_SNAPSHOT
> where MINUTE_START >= '2019-09-25 18:32:00' and MINUTE_START<='2019-09-25
> 18:33:00'
> and EVENTCODE = 'faceAntispam'
> group by MINUTE_START, EVENTCODE, RUNTIME, TASKID order by RUNTIME desc{code}
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