Question

In mysql database I have a table named bug_list

tables name: bug_list

id    projectId    created_date  
1     5            2012-06-30 13:30:57  
2     5            2012-07-30 10:30:58  
3     5            2012-07-30 12:30:44  
4     5            2012-07-31 13:30:14  
5     5            2012-07-31 14:30:32 

I want to sort it by month (like jan, feb… ) in the first result,
sort it by week day (like mon, tue, wed) in the second result
and sort it by hour (like 2hrs range say 8-10am, 10-12pm….) in the third result

I can’t understand from criteria query. Can somebody explain how to resolve this issue?

Answer 1

HERE you can find something useful.

Start by extending Hibernate Order class:

public class CustomizedOrderBy extends Order {
    private String sqlExpression;

    protected CustomizedOrderBy(String sqlExpression) {
        super(sqlExpression, true);
        this.sqlExpression = sqlExpression;
    }

    public String toSqlString(Criteria criteria, CriteriaQuery criteriaQuery) throws HibernateException {
        return sqlExpression;
    }

    public static Order sqlFormula(String sqlFormula) {
        return new CustomizedOrderBy(sqlFormula);
    }

    public String toString() {
        return sqlExpression;
    }

}

Then use some SQL formula:

criteria.addOrder(CustomizedOrderBy.sqlFormula("MONTH("+sortBy.getInnerName()+")"+ asc));
criteria.addOrder(CustomizedOrderBy.sqlFormula("WEEKDAY("+sortBy.getInnerName()+")"+ asc));
criteria.addOrder(CustomizedOrderBy.sqlFormula("HOUR("+sortBy.getInnerName()+")"+ asc));