| Whats not clear in that case here, i think its just obvious from looking at the code? If you do a:
NativeQuery<Long> nativeQuery = session.createNativeQuery("select 999999999999 from dual", Long.class);
nativeQuery.uniqueResult();
this is going to fail with:
Caused by: org.hibernate.MappingException: Unknown entity: java.lang.Long
at org.hibernate.metamodel.internal.MetamodelImpl.entityPersister(MetamodelImpl.java:620)
at org.hibernate.engine.spi.SessionFactoryImplementor.getEntityPersister(SessionFactoryImplementor.java:335)
at org.hibernate.loader.custom.sql.SQLQueryReturnProcessor.getSQLLoadable(SQLQueryReturnProcessor.java:358)
at org.hibernate.loader.custom.sql.SQLQueryReturnProcessor.processRootReturn(SQLQueryReturnProcessor.java:411)
at org.hibernate.loader.custom.sql.SQLQueryReturnProcessor.processReturn(SQLQueryReturnProcessor.java:378)
at org.hibernate.loader.custom.sql.SQLQueryReturnProcessor.process(SQLQueryReturnProcessor.java:180)
at org.hibernate.loader.custom.sql.SQLCustomQuery.<init>(SQLCustomQuery.java:71)
at org.hibernate.engine.query.internal.NativeQueryInterpreterStandardImpl.createQueryPlan(NativeQueryInterpreterStandardImpl.java:70)
at org.hibernate.engine.query.spi.QueryPlanCache.getNativeSQLQueryPlan(QueryPlanCache.java:213)
at org.hibernate.internal.AbstractSharedSessionContract.getNativeQueryPlan(AbstractSharedSessionContract.java:545)
at org.hibernate.internal.AbstractSharedSessionContract.list(AbstractSharedSessionContract.java:987)
at org.hibernate.query.internal.NativeQueryImpl.doList(NativeQueryImpl.java:148)
at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1410)
But it should work because the API does tell this:
resultClass - The Java type to map results to
And Long.class is a java type which you can map results to. Is it now clear whats not working? |
