HHH-15477 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/jpa/criteria/subquery/RootInSubqueryWhereClauseTest.java

@@ -0,0 +1,137 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.orm.test.jpa.criteria.subquery;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.orm.junit.EntityManagerFactoryScope;
+import org.hibernate.testing.orm.junit.Jpa;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.Table;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
+import jakarta.persistence.criteria.Root;
+import jakarta.persistence.criteria.Subquery;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+
+@Jpa(
+		annotatedClasses = {
+				RootInSubqueryWhereClauseTest.Person.class,
+				RootInSubqueryWhereClauseTest.Address.class
+		}
+)
+@TestForIssue(jiraKey = "HHH-15477")
+public class RootInSubqueryWhereClauseTest {
+
+	@BeforeEach
+	public void setUp(EntityManagerFactoryScope scope){
+		scope.inTransaction(
+				entityManager -> {
+					Person person = new Person(1, "Andrea");
+					Address address = new Address(2, "Gradoli", "Via Roma");
+					person.addAddress( address );
+					entityManager.persist( address );
+					entityManager.persist( person );
+
+					Person anotherPerson = new Person(2, "Luigi");
+					entityManager.persist( anotherPerson );
+				}
+		);
+	}
+
+	@Test
+	public void testSubquery(EntityManagerFactoryScope scope) {
+		scope.inTransaction(
+				entityManager -> {
+					CriteriaBuilder builder = entityManager.getCriteriaBuilder();
+
+					CriteriaQuery<Person> query = builder.createQuery( Person.class );
+					Root<Person> person = query.from( Person.class );
+
+					Subquery<String> subQuery = query.subquery( String.class );
+
+					Root<Address> address = subQuery.from( Address.class );
+					subQuery.select( address.get( "city" ) ).where( builder.equal( address.get( "person" ), person ) );
+
+					query.where( builder.exists( subQuery ) );
+
+					List<Person> people = entityManager.createQuery( query ).getResultList();
+					assertThat(people.size()).isEqualTo( 1 );
+					assertThat( people.get( 0 ).getName() ).isEqualTo( "Andrea" );
+				}
+		);
+	}
+
+	@Entity(name = "Person")
+	public static class Person {
+		@Id
+		Integer id;
+
+		String name;
+
+		@OneToMany
+		List<Address> addresses =new ArrayList<>();
+
+		public Person() {
+		}
+
+		public Person(Integer id, String name) {
+			this.id = id;
+			this.name = name;
+		}
+
+		public void addAddress(Address address){
+			addresses.add( address );
+			address.person = this;
+		}
+
+		public Integer getId() {
+			return id;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public List<Address> getAddresses() {
+			return addresses;
+		}
+	}
+
+	@Entity(name = "Address")
+	@Table(name = "ADDRESS_TABLE")
+	public static class Address {
+		@Id
+		Integer id;
+
+		private String city;
+
+		private String street;
+
+		@ManyToOne
+		private Person person;
+
+		public Address() {
+		}
+
+		public Address(Integer id, String city, String street) {
+			this.id = id;
+			this.city = city;
+			this.street = street;
+		}
+	}
+}