cast integers to Durations

hibernate-core/src/main/java/org/hibernate/type/spi/TypeConfiguration.java

@@ -339,6 +339,7 @@ public class TypeConfiguration implements SessionFactoryObserver, Serializable {
 			case "zoneddatetime": return getBasicTypeForJavaType( ZonedDateTime.class );
 			case "biginteger": return getBasicTypeForJavaType( BigInteger.class );
 			case "bigdecimal": return getBasicTypeForJavaType( BigDecimal.class );
+			case "duration": return getBasicTypeForJavaType( Duration.class );
 			case "binary": return getBasicTypeForJavaType( byte[].class );
 			//this one is very fragile ... works well for BIT or BOOLEAN columns only
 			//works OK, I suppose, for integer columns, but not at all for char columns

hibernate-core/src/test/java/org/hibernate/orm/test/query/hql/FunctionTests.java

@@ -1256,6 +1256,14 @@ public class FunctionTests {
 					assertEquals( 5*60*1_000_000_000L,
 							session.createQuery("select cast(5 minute as Long)", Long.class)
 									.getSingleResult() );
+					assertEquals( Duration.of(5, ChronoUnit.MINUTES),
+							session.createQuery("select cast(?1 as Duration)", Duration.class)
+									.setParameter(1, 5*60*1000000000L)
+									.getSingleResult() );
+					assertEquals( Duration.of(1, ChronoUnit.DAYS),
+							session.createQuery("select cast(?1 as Duration)", Duration.class)
+									.setParameter(1, 24*60*60*1000000000L)
+									.getSingleResult() );
 				}
 		);
 	}