]
Christoph Gerkens commented on HHH-5078:
----------------------------------------
Hibernate log output:
Hibernate: /* select distinct 2.0BD - 1.0BD / 2.0BD from
hibernateBugHHH5078TestCase.SystemUser as generatedAlias0 */ select top ? distinct
2.0-(1.0/2.0) as col_0_0_ from INFORMATION_SCHEMA.SYSTEM_USERS systemuser0_
JPA criteria query numeric expressions produce wrong result (due to
wrong bracketing)
-------------------------------------------------------------------------------------
Key: HHH-5078
URL:
http://opensource.atlassian.com/projects/hibernate/browse/HHH-5078
Project: Hibernate Core
Issue Type: Bug
Components: entity-manager, query-criteria
Affects Versions: 3.5.0-Final
Environment: Hibernate-Core 3.5.0-Final, all database platforms
Reporter: Christoph Gerkens
The combination of quot and diff results in wrong SQL code. E.g.: (2 - 1) / 2 should be
evaluated to 0.5 not 1.5 ( which is 2 - (1 / 2).
JUnit 4 Test:
@Test
public void testJpaCriteriaApiQuoteAndDiff() {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<Number> query = cb.createQuery(Number.class);
query.from(SystemUser.class); // entity type doesn't matter, but must contain at
least one entry for this test case.
query.select( // (2 - 1) / 2
cb.quot(
cb.diff(
cb.literal(BigDecimal.valueOf(2.0)),
cb.literal(BigDecimal.valueOf(1.0))),
BigDecimal.valueOf(2.0))).distinct(true);
Number result = em.createQuery(query).getSingleResult();
assertEquals(0.5d, result.doubleValue(), 0.1d); // (2 - 1) / 2 = 0.5
}
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