HHH-12099 - Query#getLockMode ought to throw exception for non-SELECT

hibernate-core/src/main/java/org/hibernate/query/internal/AbstractProducedQuery.java

@@ -1223,6 +1223,9 @@ public abstract class AbstractProducedQuery<R> implements QueryImplementor<R> {
 
 	@Override
 	public LockModeType getLockMode() {
+		if ( !isSelect() ) {
+			throw new IllegalStateException( "Illegal attempt to get lock mode on a non-SELECT query" );
+		}
 		return LockModeTypeHelper.getLockModeType( lockOptions.getLockMode() );
 	}
 

hibernate-core/src/test/java/org/hibernate/test/jpa/compliance/NonSelectQueryLockMode.java

@@ -0,0 +1,36 @@
+/*
+ * 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.test.jpa.compliance;
+
+import javax.persistence.LockModeType;
+
+import org.hibernate.test.jpa.AbstractJPATest;
+import org.junit.Test;
+
+import static org.hibernate.testing.transaction.TransactionUtil2.inTransaction;
+
+/**
+ * @author Steve Ebersole
+ */
+public class NonSelectQueryLockMode extends AbstractJPATest {
+
+	@Test( expected = IllegalStateException.class )
+	public void testNonSelectQueryGetLockMode() {
+		inTransaction(
+				sessionFactory(),
+				session -> session.createQuery( "delete Item" ).getLockMode()
+		);
+	}
+
+	@Test( expected = IllegalStateException.class )
+	public void testNonSelectQuerySetLockMode() {
+		inTransaction(
+				sessionFactory(),
+				session -> session.createQuery( "delete Item" ).setLockMode( LockModeType.PESSIMISTIC_WRITE )
+		);
+	}
+}