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Posted to issues@kylin.apache.org by "Dayue Gao (JIRA)" <ji...@apache.org> on 2016/10/20 10:30:59 UTC

[jira] [Created] (KYLIN-2115) some extended column query returns wrong answer

Dayue Gao created KYLIN-2115:
--------------------------------

             Summary: some extended column query returns wrong answer
                 Key: KYLIN-2115
                 URL: https://issues.apache.org/jira/browse/KYLIN-2115
             Project: Kylin
          Issue Type: Bug
          Components: General
    Affects Versions: v1.5.4, v1.5.4.1
            Reporter: Dayue Gao
            Assignee: Dayue Gao
            Priority: Critical


KYLIN-1979 introduces a bug, which can cause extended column query returns wrong result if user defines more than one extended column metrics.

{noformat}
Example: let's define two extended columns
1. metricA(host=h1, extend=e1)
2. metricB(host=h2, extend=e2).

"select h1, e1 ... group by h1,e1" correct.
"select h1, e1, h2, e2 ... group by h1,e1, h2, e2" correct.
"select h2, e2 ... group by h2, e2" wrong. (column e2 is empty)

{noformat}



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