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Posted to commits@cayenne.apache.org by "Nikita Timofeev (JIRA)" <ji...@apache.org> on 2017/08/29 07:33:00 UTC
[jira] [Created] (CAY-2356) EJBQL: Incorrect COUNT() on outer
joined table
Nikita Timofeev created CAY-2356:
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Summary: 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
Priority: Minor
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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