**Setup

Create a User table –

USER_ID integer not null primary key,
USER_NAME varchar(256) not null,

Insert a row into this table –

(1, ‘Joe Doe’)

**Junit test code

{{ String sql = "SELECT user_id FROM SCHEMA.USER WHERE user_name = 'Joe Doe'; }}

{{ // obtain a hibernate session here}}

{{ NativeQuery<Integer> query = session.createNativeQuery(sql, Integer.class);}}
{{ query.addScalar("user_id", StandardBasicTypes.INTEGER);}}
{{ List<Integer> rsList = query.list();}}
{{ assertNotNull(rsList);}}
{{ assertEquals(1, rsList.size());}}
{{ assertEquals(Integer.valueOf(1), rsList.get(0));}}

**Error

_{org.opentest4j.AssertionFailedError: expected: <1> but was: <[1, 1]>
Expected :1
Actual :[Ljava.lang.Object;@71b6ccab}

**Observation

if I remove the query.addScalar() line, the test works.