[
https://issues.apache.org/jira/browse/KYLIN-2974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16262345#comment-16262345
]
Yang Hao commented on KYLIN-2974:
---------------------------------
it may be caused by "kylin.cube.aggrgroup.is-mandatory-only-valid", for the
default value is false. If there are many aggs in a cube, and one agg is full
of the mandatory columns, then one query with all column in the agg, it may
trigger the error
> joint group is Null lead to query error
> ---------------------------------------
>
> Key: KYLIN-2974
> URL: https://issues.apache.org/jira/browse/KYLIN-2974
> Project: Kylin
> Issue Type: Bug
> Components: Query Engine
> Affects Versions: v2.1.0
> Reporter: Yang Hao
> Assignee: Yang Hao
> Attachments: KYLIN-2974.patch
>
>
> When query a sql, it turns to find all possible aggregation group. But it may
> cause error when the joint group is empty. Relevant code is
> {code:java}
> cuboidID = cuboidID | Collections.min(agg.getJoints(),
> cuboidSelectComparator);
> {code}
> In our env, when we have multiple aggregation groups, it may trigger the error
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
