[teiid-issues] [JBoss JIRA] (TEIID-4158) Hive/Impala translator - select distinct and gorup by is not supported in one query

[Juraj Duráni (JIRA)]

Juraj Duráni created TEIID-4158:
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             Summary: Hive/Impala translator - select distinct and gorup by is not supported in one query
                 Key: TEIID-4158
                 URL: https://issues.jboss.org/browse/TEIID-4158
             Project: Teiid
          Issue Type: Bug
    Affects Versions: 8.12.x
            Reporter: Juraj Duráni
            Assignee: Steven Hawkins


Hive and Impala do not support combination of SELECT DISTINCT and GROUP BY in one SQL query.

Messages of exceptions:
Impala - cannot combine SELECT DISTINCT with aggregate functions or GROUP BY
Hive - SELECT DISTINCT and GROUP BY can not be in the same query. 

DDL:
{code:sql}
CREATE VIEW Agg2 (StringNum string)
  AS SELECT BQT1.SmallA.StringNum FROM BQT1.SmallA GROUP BY BQT1.SmallA.StringNum HAVING BQT1.SmallA.StringNum = '1';
{code}
Query:
{code:sql}
SELECT DISTINCT StringNum FROM VQT.Agg2
{code}





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