Hibernate SQL aggregate Query

Use Hibernate's Templet method to execute normal SQL in one project in the following way:
String sql = "SELECT COUNT (*) as C from users";
sqlquery sq = session.createsqlquery (sql);
Object count = Sq.uniqueresult ();
Result error column ' Can not found
The workaround is to set the type of the returned column through the Addscalar method. As shown below:
String sql = "SELECT COUNT (*) as C from users";
sqlquery sq = session.createsqlquery (sql). Addscalar ("C", Hibernate.integer);
Object count = Sq.uniqueresult ();