coalesce with entity path leads to NPE: SqlExpressible.getJdbcMapping()
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- 02 May 2023, 12:16 PM
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Christian Beikov May 2, 2023 at 1:39 PM
Whatever Hibernate 5 did there before, this was never supported. Use the basic paths instead i.e. coalesce(par.id, a.id)
@Entity @Table(name = "ENTITY_A") public class EntityA { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "ID") Integer id; @JoinColumn(name = "PARENT_ENTITY") @ManyToOne EntityA parent; }@Test public void hhhXXXXTest() throws Exception { try (Session s = openSession()) { Transaction tx = s.beginTransaction(); EntityA entityA = new EntityA(); s.persist(entityA); tx.commit(); } try (Session s = openSession()) { Query<EntityA> query = s.createQuery("select coalesce(par, a) from EntityA a left join a.parent par", EntityA.class); List<EntityA> actual = query.getResultList(); assertThat(actual).hasSize(1); } }java.lang.NullPointerException: Cannot invoke "org.hibernate.metamodel.mapping.SqlExpressible.getJdbcMapping()" because the return value of "org.hibernate.sql.ast.tree.expression.Expression.getExpressionType()" is null at org.hibernate.sql.results.internal.SqlSelectionImpl.getJdbcValueExtractor(SqlSelectionImpl.java:68) at org.hibernate.sql.results.jdbc.internal.JdbcValuesResultSetImpl.readCurrentRowValues(JdbcValuesResultSetImpl.java:262) at org.hibernate.sql.results.jdbc.internal.JdbcValuesResultSetImpl.advance(JdbcValuesResultSetImpl.java:243) at org.hibernate.sql.results.jdbc.internal.JdbcValuesResultSetImpl.processNext(JdbcValuesResultSetImpl.java:84) at org.hibernate.sql.results.jdbc.internal.AbstractJdbcValues.next(AbstractJdbcValues.java:29) at org.hibernate.sql.results.internal.RowProcessingStateStandardImpl.next(RowProcessingStateStandardImpl.java:65) at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:198) at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:33) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.doExecuteQuery(JdbcSelectExecutorStandardImpl.java:362) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.executeQuery(JdbcSelectExecutorStandardImpl.java:168) at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.list(JdbcSelectExecutorStandardImpl.java:93) at org.hibernate.sql.exec.spi.JdbcSelectExecutor.list(JdbcSelectExecutor.java:31) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.lambda$new$0(ConcreteSqmSelectQueryPlan.java:109) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.withCacheableSqmInterpretation(ConcreteSqmSelectQueryPlan.java:302) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.performList(ConcreteSqmSelectQueryPlan.java:243) at org.hibernate.query.sqm.internal.QuerySqmImpl.doList(QuerySqmImpl.java:518) at org.hibernate.query.spi.AbstractSelectionQuery.list(AbstractSelectionQuery.java:367) at org.hibernate.query.Query.getResultList(Query.java:119) at org.hibernate.bugs.ORMUnitTestCase.hhhXXXXTest(ORMUnitTestCase.java:71) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56) at org.hibernate.testing.junit4.ExtendedFrameworkMethod.invokeExplosively(ExtendedFrameworkMethod.java:45) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299) at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.lang.Thread.run(Thread.java:833)Failing test case attached and also available at https://github.com/ratoaq2/HHH-16539