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https://issues.apache.org/jira/browse/KYLIN-2974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16262345#comment-16262345
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Yang Hao edited comment on KYLIN-2974 at 11/22/17 11:30 AM:
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[~liyang.g...@gmail.com]]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 will trigger the error
was (Author: yanghaogn):
[~liyang.gmt8%40gmail.com]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 will 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
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