[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-5419) COUNT operator with composite primary key and JPA 2.0 Criteria API produces bad sql
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http://opensource.atlassian.com/projects/hibernate/browse/HHH-5419?page=c...
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Anne Buit commented on HHH-5419:
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select count(generatedAlias0)
from ProjectActivity as generatedAlias0
Using org.hibernate.dialect.SQLServerDialect, this translates into:
select top 2 count((projectact0_.project_id, projectact0_.project_activity_id)) as
col_0_0_
from project_activity projectact0_
The entire composite primary key is used within the count() operator.
COUNT operator with composite primary key and JPA 2.0 Criteria API
produces bad sql
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Key: HHH-5419
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5419
Project: Hibernate Core
Issue Type: Bug
Affects Versions: 3.5.1, 3.5.2, 3.5.3, 3.5.4, 3.6.0.Beta1
Environment: hibernate-entitymanager 3.6.0.Beta1, glassfish 3.0.1, linux ubuntu
10.04, MS SQL Server 2008
Reporter: Fabio Braga de Oliveira
Priority: Minor
Attachments: hibernate-count-bug.zip
Hibernate produces a invalid SQL if anyone use the count() operator with the JPA 2.0
Criteria API. Code:
CriteriaBuilder cb = getEntityManager().getCriteriaBuilder();
CriteriaQuery<Object[]> cq = cb.createQuery(Object[].class);
Root<EntityCompositePK> r = cq.from(EntityCompositePK.class);
cq.multiselect(cb.count(r));
assertEquals(0, ((Long)
(getEntityManager().createQuery(cq).getSingleResult())[0]).intValue());
I'm sending a little maven project which reproduces the bug.
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