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HHH-18583 Add test for issue

This commit is contained in:
Marco Belladelli 2024-09-10 08:57:05 +02:00
parent b5221e2ec6
commit 42cf3b59f6
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1 changed files with 38 additions and 3 deletions
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41
hibernate-core/src/test/java/org/hibernate/orm/test/inheritance/discriminator/JoinedInheritanceDiscriminatorSelectionTest.java
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@ -36,6 +36,7 @@ import static org.assertj.core.api.Assertions.assertThat;
@SessionFactory( useCollectingStatementInspector = true )
@Jira( "https://hibernate.atlassian.net/browse/HHH-17727" )
@Jira( "https://hibernate.atlassian.net/browse/HHH-17806" )
@Jira( "https://hibernate.atlassian.net/browse/HHH-18583" )
public class JoinedInheritanceDiscriminatorSelectionTest {
@BeforeAll
public void setUp(SessionFactoryScope scope) {
@ -49,7 +50,7 @@ public class JoinedInheritanceDiscriminatorSelectionTest {
@AfterAll
public void tearDown(SessionFactoryScope scope) {
scope.inTransaction( session -> session.createMutationQuery( "delete from ParentEntity" ).executeUpdate() );
scope.getSessionFactory().getSchemaManager().truncateMappedObjects();
}
@Test
@ -91,6 +92,23 @@ public class JoinedInheritanceDiscriminatorSelectionTest {
String.class
).getResultList() ).containsOnly( "parent", "child_a" );
inspector.assertNumberOfJoins( 0, 0 );
inspector.clear();
// With treat() we preserve the join
assertThat( session.createQuery(
"select p.name from ParentEntity p where treat(p as ChildA).id is not null",
String.class
).getResultList() ).containsExactlyInAnyOrder( "child_a", "sub_child_a" );
inspector.assertNumberOfJoins( 0, 1 );
inspector.clear();
assertThat( session.createQuery(
"select p.name from ParentEntity p where treat(p as ChildB).id is not null",
String.class
).getSingleResult() ).isEqualTo( "child_b" );
inspector.assertNumberOfJoins( 0, 1 );
inspector.clear();
} );
}
@ -121,8 +139,9 @@ public class JoinedInheritanceDiscriminatorSelectionTest {
inspector.clear();
scope.inTransaction( session -> {
// NOTE: we currently always join all subclasses when selecting the entity instance. We could
// maybe avoid this when we have a physical discriminator column and a type filter
// With type filters we still join all subclasses when selecting the entity instance
// because we are not aware of the type restriction when processing the selection
assertThat( session.createQuery(
"from ParentEntity p where type(p) = ParentEntity",
ParentEntity.class
@ -142,6 +161,22 @@ public class JoinedInheritanceDiscriminatorSelectionTest {
ParentEntity.class
).getResultList() ).hasSize( 1 );
inspector.assertNumberOfJoins( 0, 3 );
inspector.clear();
// With treat() we only join the needed subclasses
assertThat( session.createQuery(
"select treat(p as ChildA) from ParentEntity p",
ParentEntity.class
).getResultList() ).hasSize( 2 );
inspector.assertNumberOfJoins( 0, 2 );
inspector.clear();
assertThat( session.createQuery(
"select treat(p as ChildB) from ParentEntity p",
ParentEntity.class
).getResultList() ).hasSize( 1 );
inspector.assertNumberOfJoins( 0, 1 );
} );
}