HHH-16213 Add test for issue
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Marco Belladelli
Christian Beikov
parent
058f31a769
commit
425879d9a7
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/*
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* Hibernate, Relational Persistence for Idiomatic Java
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*
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* License: GNU Lesser General Public License (LGPL), version 2.1 or later
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* See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
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*/
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package org.hibernate.orm.test.mapping.fetch.subselect;
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import java.util.ArrayList;
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import java.util.List;
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import org.hibernate.annotations.Fetch;
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import org.hibernate.annotations.FetchMode;
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import org.hibernate.testing.jdbc.SQLStatementInspector;
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import org.hibernate.testing.orm.junit.DomainModel;
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import org.hibernate.testing.orm.junit.Jira;
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import org.hibernate.testing.orm.junit.SessionFactory;
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import org.hibernate.testing.orm.junit.SessionFactoryScope;
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import org.junit.jupiter.api.AfterAll;
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import org.junit.jupiter.api.BeforeAll;
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import org.junit.jupiter.api.Test;
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import jakarta.persistence.CascadeType;
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import jakarta.persistence.Entity;
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import jakarta.persistence.FetchType;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.Id;
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import jakarta.persistence.JoinColumn;
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import jakarta.persistence.ManyToOne;
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import jakarta.persistence.OneToMany;
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import jakarta.persistence.OrderBy;
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import jakarta.persistence.criteria.CriteriaBuilder;
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import jakarta.persistence.criteria.CriteriaQuery;
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import jakarta.persistence.criteria.Root;
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import static org.assertj.core.api.Assertions.assertThat;
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/**
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* @author Marco Belladelli
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*/
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@DomainModel( annotatedClasses = {
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SubselectOneToManyTest.GrandParent.class,
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SubselectOneToManyTest.Parent.class,
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SubselectOneToManyTest.Child.class
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} )
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@SessionFactory( useCollectingStatementInspector = true )
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@Jira( "https://hibernate.atlassian.net/browse/HHH-16213" )
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public class SubselectOneToManyTest {
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@BeforeAll
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public void setUp(SessionFactoryScope scope) {
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scope.inTransaction( session -> {
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final Parent parent1 = new Parent();
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final Child child1 = new Child( parent1, "a" );
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final Child child2 = new Child( parent1, "b" );
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final Child child3 = new Child( parent1, "c" );
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parent1.getChildren().addAll( List.of( child1, child2, child3 ) );
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session.persist( parent1 );
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final GrandParent grandParent = new GrandParent( "Luigi" );
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final Parent parent2 = new Parent( grandParent );
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final Child child4 = new Child( parent2, "d" );
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final Child child5 = new Child( parent2, "e" );
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parent2.getChildren().addAll( List.of( child4, child5 ) );
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session.persist( grandParent );
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session.persist( parent2 );
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} );
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}
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@AfterAll
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public void tearDown(SessionFactoryScope scope) {
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scope.inTransaction( session -> {
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session.createMutationQuery( "delete from Child" ).executeUpdate();
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session.createMutationQuery( "delete from Parent" ).executeUpdate();
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session.createMutationQuery( "delete from GrandParent" ).executeUpdate();
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} );
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}
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@Test
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public void testIsNull(SessionFactoryScope scope) {
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final SQLStatementInspector statementInspector = scope.getCollectingStatementInspector();
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statementInspector.clear();
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scope.inTransaction( session -> {
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final CriteriaBuilder cb = session.getCriteriaBuilder();
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final CriteriaQuery<Parent> query = cb.createQuery( Parent.class );
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final Root<Parent> root = query.from( Parent.class );
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query.select( root ).where( cb.isNull( root.get( "grandParent" ) ) );
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final Parent parent = session.createQuery( query ).getSingleResult();
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assertThat( parent.getId() ).isEqualTo( 1L );
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assertThat( parent.getGrandParent() ).isNull();
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assertThat( parent.getChildren() ).hasSize( 3 );
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statementInspector.assertExecutedCount( 2 ); // 1 query for parent, 1 for children
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statementInspector.assertNumberOfOccurrenceInQuery( 0, "join", 0 );
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statementInspector.assertNumberOfOccurrenceInQuery( 1, "join", 0 );
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} );
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}
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@Test
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public void testShouldJoin(SessionFactoryScope scope) {
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final SQLStatementInspector statementInspector = scope.getCollectingStatementInspector();
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statementInspector.clear();
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scope.inTransaction( session -> {
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final CriteriaBuilder cb = session.getCriteriaBuilder();
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final CriteriaQuery<Parent> query = cb.createQuery( Parent.class );
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final Root<Parent> root = query.from( Parent.class );
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query.select( root ).where( cb.equal( root.get( "grandParent" ).get( "name" ), "Luigi" ) );
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final Parent parent = session.createQuery( query ).getSingleResult();
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assertThat( parent.getId() ).isEqualTo( 2L );
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assertThat( parent.getGrandParent().getName() ).isEqualTo( "Luigi" );
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assertThat( parent.getChildren() ).hasSize( 2 );
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statementInspector.assertExecutedCount( 3 ); // 1 query for parent, 1 for grandparent, 1 for children
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statementInspector.assertNumberOfOccurrenceInQuery( 0, "join", 1 );
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statementInspector.assertNumberOfOccurrenceInQuery( 2, "join", 1 );
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} );
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}
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@Entity( name = "GrandParent" )
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public static class GrandParent {
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@Id
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@GeneratedValue
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private Long id;
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private String name;
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public GrandParent() {
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}
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public GrandParent(String name) {
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this.name = name;
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}
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public Long getId() {
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return id;
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}
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public String getName() {
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return name;
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}
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}
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@Entity( name = "Parent" )
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public static class Parent {
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@Id
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@GeneratedValue
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private Long id;
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@ManyToOne
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@JoinColumn( name = "grand_parent" )
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private GrandParent grandParent;
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@OneToMany( mappedBy = "parent", cascade = CascadeType.ALL, fetch = FetchType.LAZY )
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@Fetch( value = FetchMode.SUBSELECT )
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@OrderBy( "name ASC" )
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private List<Child> children = new ArrayList<>();
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public Parent() {
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}
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public Parent(GrandParent grandParent) {
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this.grandParent = grandParent;
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}
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public Long getId() {
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return id;
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}
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public GrandParent getGrandParent() {
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return grandParent;
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}
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public List<Child> getChildren() {
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return children;
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}
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}
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@Entity( name = "Child" )
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public static class Child {
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@Id
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@GeneratedValue
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private Long id;
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@ManyToOne
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@JoinColumn( name = "parent_id", nullable = false )
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private Parent parent;
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private String name;
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public Child() {
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}
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public Child(Parent parent, String name) {
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this.parent = parent;
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this.name = name;
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}
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public Long getId() {
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return id;
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}
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public Parent getParent() {
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return parent;
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}
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public String getName() {
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return name;
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}
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}
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}
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