HHH-17017 Hibernate 6 cannot read VARCHAR column as INT

hibernate-core/src/test/java/org/hibernate/orm/test/mapping/enumeratedvalue/EnumAndColumnDefinitionTest.java

@@ -0,0 +1,161 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.mapping.enumeratedvalue;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.EnumeratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import org.hibernate.annotations.JdbcTypeCode;
+import org.hibernate.dialect.H2Dialect;
+import org.hibernate.dialect.MariaDBDialect;
+import org.hibernate.dialect.MySQLDialect;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.RequiresDialect;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.hibernate.type.SqlTypes;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.AssertionsForInterfaceTypes.assertThat;
+
+@DomainModel(
+		annotatedClasses = {
+				EnumAndColumnDefinitionTest.TestEntity.class
+		}
+)
+@SessionFactory
+@JiraKey("HHH-17017")
+@RequiresDialect(MySQLDialect.class)
+@RequiresDialect(MariaDBDialect.class)
+@RequiresDialect(H2Dialect.class)
+public class EnumAndColumnDefinitionTest {
+
+	@AfterAll
+	public static void cleanup(SessionFactoryScope scope) {
+		scope.getSessionFactory().getSchemaManager().truncateMappedObjects();
+	}
+
+	@Test
+	public void testFind(SessionFactoryScope scope) {
+		var id = 1L;
+		var enumValue = MyEnum.A;
+		var anotherEnumValue = AnotherMyEnum.B;
+		var anotherEnumValue2 = AnotherMyEnum.A;
+		scope.inTransaction(
+				session ->
+						session.persist( new TestEntity( id, enumValue, anotherEnumValue, anotherEnumValue2 ) )
+		);
+
+		scope.inSession(
+				session -> {
+					var selectMyEnum = session.createNativeQuery(
+									"select my_enum from test_entity",
+									String.class
+							)
+							.getSingleResult();
+					assertThat( selectMyEnum ).isEqualTo( "0" );
+
+					var selectAnotherMyEnum = session.createNativeQuery(
+									"select another_my_enum from test_entity",
+									String.class
+							)
+							.getSingleResult();
+					assertThat( selectAnotherMyEnum ).isEqualTo( "1" );
+
+					var selectAnotherMyEnum2 = session.createNativeQuery(
+									"select another_my_enum_2 from test_entity",
+									String.class
+							)
+							.getSingleResult();
+					// because the attribute is annotated with @JdbcTypeCode(SqlTypes.VARCHAR)
+					// the enum string value has been saved
+					assertThat( selectAnotherMyEnum2 ).isEqualTo( "A" );
+				}
+		);
+
+		scope.inSession(
+				session -> {
+					var testEntity = session.find( TestEntity.class, id );
+					assertThat( testEntity.myEnum ).isEqualTo( enumValue );
+					assertThat( testEntity.anotherMyEnum ).isEqualTo( anotherEnumValue );
+					assertThat( testEntity.anotherMyEnum2 ).isEqualTo( anotherEnumValue2 );
+				}
+		);
+	}
+
+	public enum MyEnum {
+		A( 0 ),
+		B( 1 );
+
+		@EnumeratedValue
+		final int intValue;
+
+		MyEnum(int intValue) {
+			this.intValue = intValue;
+		}
+	}
+
+	public enum AnotherMyEnum {
+		A,
+		B;
+	}
+
+	@Entity(name = "TestEntity")
+	@Table(name = "test_entity")
+	public static class TestEntity {
+		@Id
+		Long id;
+
+		@Enumerated(value = EnumType.ORDINAL)
+		@Column(name = "my_enum", columnDefinition = "VARCHAR(255) NOT NULL")
+		/*
+			Annotating the enum with @EnumeratedValue permits to store the ordinal value
+			and retrieve the correct enum value even when the colum is VARCHAR without the
+			need to specify the @JdbcTypeCode(...).
+		*/
+		MyEnum myEnum;
+
+		@Enumerated(value = EnumType.ORDINAL)
+		@Column(name = "another_my_enum", columnDefinition = "VARCHAR(255) NOT NULL")
+		/*
+			Without specifying the JdbcTypeCode Hibernate has no clue
+			of the column being a VARCHAR and being the enum type an
+			ordinal so a TinyIntJdbcType is used.
+			Using @JdbcTypeCode(SqlTypes.INTEGER) the ordinal values is saved.
+		 */
+		@JdbcTypeCode(SqlTypes.INTEGER)
+		AnotherMyEnum anotherMyEnum;
+
+		@Enumerated(value = EnumType.ORDINAL)
+		@Column(name = "another_my_enum_2", columnDefinition = "VARCHAR(255) NOT NULL")
+		/*
+			Without specifying the JdbcTypeCode Hibernate has no clue
+			of the column being a VARCHAR and being the enum type an
+			ordinal so TinyIntJdbcType is used.
+			Using @JdbcTypeCode(SqlTypes.VARCHAR) the enum string value is saved.
+		 */
+		@JdbcTypeCode(SqlTypes.VARCHAR)
+		AnotherMyEnum anotherMyEnum2;
+
+		String name;
+
+		public TestEntity() {
+
+		}
+
+		public TestEntity(Long id, MyEnum myEnum, AnotherMyEnum anotherMyEnum, AnotherMyEnum anotherMyEnum2) {
+			this.id = id;
+			this.myEnum = myEnum;
+			this.anotherMyEnum = anotherMyEnum;
+			this.anotherMyEnum2 = anotherMyEnum2;
+		}
+	}
+}