HHH-18515 Add test for issue

Author: dreab8

hibernate-core/src/test/java/org/hibernate/orm/test/query/NativeQueryAndDiscriminatorTest.java

@@ -0,0 +1,116 @@
+/*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.query;
+
+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.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.DiscriminatorColumn;
+import jakarta.persistence.DiscriminatorType;
+import jakarta.persistence.DiscriminatorValue;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.Id;
+import jakarta.persistence.Inheritance;
+import jakarta.persistence.InheritanceType;
+import jakarta.persistence.Table;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+@DomainModel(
+		annotatedClasses = {
+				NativeQueryAndDiscriminatorTest.BaseEntity.class,
+				NativeQueryAndDiscriminatorTest.TestEntity.class
+		}
+)
+@SessionFactory
+@JiraKey("HHH-18515")
+public class NativeQueryAndDiscriminatorTest {
+
+
+	@BeforeEach
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					TestEntity e = new TestEntity( 1l, "test", EntityDiscriminator.T );
+					session.persist( e );
+				}
+		);
+	}
+
+	@AfterEach
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					session.createMutationQuery( "delete TestEntity" ).executeUpdate();
+				}
+		);
+	}
+
+	@Test
+	public void testNativeQuery(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					BaseEntity entity = session.createNativeQuery(
+									"select * from BASE_ENTITY where id = :id",
+									BaseEntity.class
+							)
+							.setParameter( "id", 1l )
+							.getSingleResult();
+					assertThat( entity ).isNotNull();
+				}
+		);
+	}
+
+
+	@Entity(name = "BaseEntity")
+	@Table(name = "BASE_ENTITY")
+	@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
+	@DiscriminatorColumn(name = "discriminator", discriminatorType = DiscriminatorType.CHAR)
+	@DiscriminatorValue("B")
+	public static class BaseEntity {
+
+		@Id
+		private Long id;
+
+		private String name;
+
+		@Column(insertable = false, updatable = false)
+		@Enumerated(EnumType.STRING)
+		private EntityDiscriminator discriminator;
+
+		public BaseEntity() {
+		}
+
+		public BaseEntity(Long id, String name, EntityDiscriminator discriminator) {
+			this.id = id;
+			this.name = name;
+			this.discriminator = discriminator;
+		}
+	}
+
+	@Entity(name = "TestEntity")
+	@DiscriminatorValue("T")
+	public static class TestEntity extends BaseEntity {
+
+		public TestEntity() {
+		}
+
+		public TestEntity(Long id, String name, EntityDiscriminator discriminator) {
+			super( id, name, discriminator );
+		}
+	}
+
+	enum EntityDiscriminator {
+		T;
+	}
+}