Puhong You ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNTRiODFmMTkz... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16489?atlOrigin=eyJpIjoiNTRiOD... ) HHH-16489 ( https://hibernate.atlassian.net/browse/HHH-16489?atlOrigin=eyJpIjoiNTRiOD... ) Hibernate native query returns duplicate column values with addScalar() call ( https://hibernate.atlassian.net/browse/HHH-16489?atlOrigin=eyJpIjoiNTRiOD... ) Issue Type: Bug Affects Versions: 6.2.1 Assignee: Unassigned Components: query-sql Created: 18/Apr/2023 11:05 AM Priority: Major Reporter: Puhong You ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) **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. ( https://hibernate.atlassian.net/browse/HHH-16489#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16489#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100222- sha1:c08beee )