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From "Nikita Timofeev (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (CAY-2356) EJBQL: Incorrect COUNT() on outer joined table
Date Wed, 30 Aug 2017 15:03:00 GMT

     [ https://issues.apache.org/jira/browse/CAY-2356?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nikita Timofeev reassigned CAY-2356:
------------------------------------

    Assignee: Nikita Timofeev

> EJBQL: Incorrect COUNT() on outer joined table 
> -----------------------------------------------
>
>                 Key: CAY-2356
>                 URL: https://issues.apache.org/jira/browse/CAY-2356
>             Project: Cayenne
>          Issue Type: Bug
>          Components: Core Library
>    Affects Versions: 4.0.B1, 4.1.M1
>            Reporter: Nikita Timofeev
>            Assignee: Nikita Timofeev
>            Priority: Minor
>             Fix For: 4.0.B1, 4.1.M1
>
>
> This query:
> {code}
> EJBQLQuery asc = new EJBQLQuery("select a, count(p) from Artist a LEFT JOIN a.paintingArray
p GROUP BY a order by count(p) DESC");
> {code}
> Produces following SQL:
> {code:sql}
> SELECT
>     t0.ARTIST_NAME AS ec0_0, 
>     t0.DATE_OF_BIRTH AS ec0_1,
>     t0.ARTIST_ID AS ec0_2, 
>     COUNT(*) AS sc1
> FROM
>     ARTIST t0
>     LEFT OUTER JOIN PAINTING t1 ON (t0.ARTIST_ID = t1.ARTIST_ID)
> GROUP BY t0.ARTIST_NAME, t0.DATE_OF_BIRTH, t0.ARTIST_ID
> ORDER BY COUNT(*)
> {code}
> Note *{{COUNT( * )}}* that gives unexpected result, if there are no paintings it will
return *1* instead of *0*, {{COUNT(t1.PAINTING_ID)}} should be used instead.



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