HHH-14985 H2Dialect does not work properly with h2 2.0.202 on inserts

Author: froque

hibernate-core/src/main/java/org/hibernate/dialect/identity/H2IdentityColumnSupport.java

@@ -28,6 +28,6 @@ public String getIdentitySelectString(String table, String column, int type) {
 
 	@Override
 	public String getIdentityInsertString() {
-		return "null";
+		return "default";
 	}
 }

hibernate-core/src/test/java/org/hibernate/orm/test/dialect/H2DialectTestCase.java

@@ -0,0 +1,79 @@
+/*
+ * 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.dialect;
+
+import java.util.List;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+
+import org.hibernate.dialect.H2Dialect;
+import org.hibernate.orm.test.jpa.BaseEntityManagerFunctionalTestCase;
+
+import org.hibernate.testing.RequiresDialect;
+import org.hibernate.testing.TestForIssue;
+import org.junit.Test;
+
+import static org.hibernate.testing.transaction.TransactionUtil.doInJPA;
+import static org.junit.Assert.assertEquals;
+
+@RequiresDialect(H2Dialect.class)
+public class H2DialectTestCase extends BaseEntityManagerFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class<?>[] { SimpleEntity.class };
+	}
+
+	@TestForIssue(jiraKey = "HHH-14985")
+	@Test
+	public void testInsertWithDefault() {
+		doInJPA( this::entityManagerFactory, entityManager -> {
+			final SimpleEntity simpleEntity = new SimpleEntity( "Entity1" );
+			entityManager.persist( simpleEntity );
+		} );
+		doInJPA( this::entityManagerFactory, entityManager -> {
+			List<SimpleEntity> results = entityManager.createQuery( "FROM SimpleEntity", SimpleEntity.class )
+					.getResultList();
+			assertEquals( 1, results.size() );
+		} );
+	}
+
+	@Entity(name = "SimpleEntity")
+	public static class SimpleEntity {
+		@Id
+		@GeneratedValue(strategy = GenerationType.IDENTITY)
+		private Integer id;
+		private String name;
+
+		public SimpleEntity() {
+
+		}
+
+		public SimpleEntity(String name) {
+			this.name = name;
+		}
+
+		public Integer getId() {
+			return id;
+		}
+
+		public void setId(Integer id) {
+			this.id = id;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public void setName(String name) {
+			this.name = name;
+		}
+	}
+}