Java SpringJPA使用单引号中的参数编写本机查询

我试图让SpringJPA通过本机查询更改postgres数据库的角色密码。在设置本机查询的参数时遇到问题。更改角色的postgres语句如下所示

ALTER role username PASSWORD'PASSWORD'

错误：

@Repository
public class PostgresRepository {

@PersistenceContext
EntityManager entityManager;

@Autowired
private JdbcTemplate jdbcTemplate;

public void updatePassword(PostgresDto postgresDto) {

    Query result = entityManager.createNativeQuery("ALTER ROLE :username PASSWORD :password ")
            .setParameter(1,postgresDto.getUsername())
            .setParameter(2,postgresDto.getPassword());
    int results = result.executeUpdate();

    }
}

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查询中缺少关键字。应该是：

org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
... 138 common frames omitted
 Caused by: org.postgresql.util.PSQLException: ERROR: syntax error at or near "$1" Position: 12 

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这不能作为本机查询使用，因为ALTERROLE语句类似于密码为“hu8jmn3”的ALTERROLE davide；使用JPA本机查询从参数中解析出单引号

ALTER ROLE :username WITH PASSWORD :password