Details
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Type:
Bug
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Status: Closed
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Priority:
Major
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Resolution: Duplicate
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Affects versions: 4.2.0.Final, 4.3.0.Beta1
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Fix versions: None
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Components: None
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Labels:None
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Bug Testcase Reminder (view):
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Last commented by a user?:true
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Sprint:
Description
(There doesn't seem to be any test for CriteriaBuilder#selectCase().)
This fails:
Root<User> u = criteria.from(User.class);
criteria.select(
cb.selectCase()
.when(
cb.equal(u.get("username"), "Foo"),
"Bar"
).otherwise("Baz")
);
The actual query/entity mapping doesn't matter, any selectCase() expression with literals fails:
java.lang.ClassCastException: org.hibernate.hql.internal.ast.tree.ParameterNode cannot be cast to org.hibernate.hql.internal.ast.tree.SelectExpression
at org.hibernate.hql.internal.ast.tree.CaseNode.getFirstThenNode(CaseNode.java:43)
at org.hibernate.hql.internal.ast.tree.CaseNode.getDataType(CaseNode.java:39)
at org.hibernate.hql.internal.ast.tree.SelectClause.initializeExplicitSelectClause(SelectClause.java:152)
at org.hibernate.hql.internal.ast.HqlSqlWalker.useSelectClause(HqlSqlWalker.java:859)
at org.hibernate.hql.internal.ast.HqlSqlWalker.processQuery(HqlSqlWalker.java:649)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:663)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:299)
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:247)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:248)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:183)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:105)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:168)
at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:270)
at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:221)
at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1778)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:538)
at org.hibernate.jpa.criteria.CriteriaQueryImpl$1.buildCompiledQuery(CriteriaQueryImpl.java:376)
at org.hibernate.jpa.criteria.compile.CriteriaCompiler.compile(CriteriaCompiler.java:128)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:679)
The rendered criteria query is using parameters for the literals:
select case when generatedAlias0.username=:param0 then :param1 else :param2 end from User as generatedAlias0
The JPQL equivalent with simple literals and no parameters works:
select case when u.username='Foo' then 'Bar' else 'Baz' end from User as u
