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Posted to issues@kylin.apache.org by "Zhong Yanghong (JIRA)" <ji...@apache.org> on 2019/03/21 17:04:00 UTC

[jira] [Created] (KYLIN-3902) NoRealizationFoundException due to creating a wrong JoinDesc

Zhong Yanghong created KYLIN-3902:
-------------------------------------

             Summary: NoRealizationFoundException due to creating a wrong JoinDesc
                 Key: KYLIN-3902
                 URL: https://issues.apache.org/jira/browse/KYLIN-3902
             Project: Kylin
          Issue Type: Bug
          Components: Query Engine
            Reporter: Zhong Yanghong
            Assignee: Zhong Yanghong


When joining with a lookup table, a column from fact table is used more than once, the JoinDesc will not be correctly generated in *OLAPJoinRel*, causing NoRealizationFoundException. Multimap should be used instead of Map.
Sample Join:
{code}
select LSTG_FORMAT_NAME, count(*)
FROM TEST_KYLIN_FACT 
INNER JOIN EDW.TEST_CAL_DT as TEST_CAL_DT
ON TEST_KYLIN_FACT.CAL_DT = TEST_CAL_DT.CAL_DT AND TEST_KYLIN_FACT.CAL_DT = TEST_CAL_DT.WEEK_BEG_DT
group by LSTG_FORMAT_NAME
{code}



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