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Posted to dev@kylin.apache.org by "Su Ralph (JIRA)" <ji...@apache.org> on 2016/02/03 04:26:39 UTC

[jira] [Created] (KYLIN-1398) Query explanation

Su Ralph created KYLIN-1398:
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             Summary: Query explanation 
                 Key: KYLIN-1398
                 URL: https://issues.apache.org/jira/browse/KYLIN-1398
             Project: Kylin
          Issue Type: Improvement
          Components: Query Engine
            Reporter: Su Ralph
            Assignee: liyang
             Fix For: 2.0


When troubleshooting kylin query, we could user "Insight" tab to issue query, then checking the kylin.log. This definitely the right way, but make it only available to kylin admin who can access the kylin log.

Since most query system provide query explanation(same as calcite), Kylin might also output query explanation in response. Say when issue query with explain=true , the query response would return structured explanation, like how many htable touched, how many records read from each htable and the time consumption.

Both kylin owner and user should benefit from such feature.




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