HHH-18570 Test case adapted from https://github.com/gaetannandelec-ibboost/hibernate6-joinsubquery

          [See Jira issue https://hibernate.atlassian.net/browse/HHH-19052]

Author: cigaly

hibernate-core/src/test/java/org/hibernate/orm/test/joinsubquery/JoinSubqueryTest.java

@@ -0,0 +1,129 @@
+/*
+ * 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.joinsubquery;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.JoinColumnOrFormula;
+import org.hibernate.annotations.JoinFormula;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import java.io.Serializable;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@DomainModel(annotatedClasses = {
+		JoinSubqueryTest.RecordItem.class,
+		JoinSubqueryTest.RecordType.class
+})
+@SessionFactory
+@JiraKey("HHH-19052")
+class JoinSubqueryTest {
+
+	@BeforeAll
+	static void setUp(SessionFactoryScope scope) throws Exception {
+		scope.inTransaction(session -> {
+			final var id = 1L;
+			final var typeId = 42L;
+			final var recordType = new RecordType(id, typeId);
+			session.persist(recordType);
+			final var item = new RecordItem(id, typeId, recordType);
+			session.persist(item);
+		});
+	}
+
+	@Test
+	void test(SessionFactoryScope scope) throws Exception {
+		scope.inSession(session -> {
+			final var item = session.get(RecordItem.class, 1L);
+			assertNotNull(item);
+		});
+	}
+
+	@Entity
+	@Table(name = "record_items")
+	public static class RecordItem implements Serializable {
+
+		@Id
+		protected Long id;
+
+		@Column(name = "type_id", insertable = false, updatable = false)
+		private Long typeId;
+
+		@ManyToOne(fetch = FetchType.EAGER)
+		@JoinColumnOrFormula(column = @JoinColumn(name = "type_id", referencedColumnName = "entity_id"))
+		@JoinColumnOrFormula(formula = @JoinFormula(value = "(SELECT x.id FROM record_types x WHERE x.entity_id = type_id)", referencedColumnName = "id"))
+		private RecordType type;
+
+		RecordItem() {
+		}
+
+		public RecordItem(Long id, Long typeId, RecordType type) {
+			this.id = id;
+			this.typeId = typeId;
+			this.type = type;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public Long getId() {
+			return this.id;
+		}
+
+		public Long getTypeId() {
+			return typeId;
+		}
+
+		public RecordType getType() {
+			return type;
+		}
+
+
+	}
+
+	@Entity
+	@Table(name = "record_types")
+	public static class RecordType implements Serializable {
+
+		@Id
+		protected Long id;
+
+		@Column(name = "entity_id")
+		private Long entityId;
+
+		RecordType() {
+		}
+
+		public RecordType(Long id, Long entityId) {
+			this.id = id;
+			this.entityId = entityId;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public Long getId() {
+			return this.id;
+		}
+
+		public Long getEntityId() {
+			return entityId;
+		}
+
+		public void setEntityId(Long entityId) {
+			this.entityId = entityId;
+		}
+
+	}
+}