[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-892) HQL parser does not resolve alias in ORDER BY clause

[Ben Wong (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_30660 ] 

Ben Wong commented on HHH-892:
------------------------------

The workaround works only for simple query.  For query such as:

select c.id, 
            c.customer,
            (select count(s.totalSales) from sales s where s.customer = c and s.customerType = 4) as totalSales,
            (select count(ex.totalExpense) from expenses ex where ex.customer = c and ex.customerType = 4) as totalExpenses
   from customer c 
 order by totalSales / totalExpenses, c.id

The above is an example I made up, but that's what I am trying to do with my (more) complex HQL query.  Unless I am wrong, I don't think you can stick subselect clauses in the order by.

P.S. I don't mean to whine, but how hard is it to replace the alias in the order by clause with the generated ones by Hibernate when generating the SQL from HQL?  I would think this is a simple fix (or enhancement).

Ben

> HQL parser does not resolve alias in ORDER  BY clause
> -----------------------------------------------------
>
>                 Key: HHH-892
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-892
>             Project: Hibernate3
>          Issue Type: Bug
>          Components: query-hql
>    Affects Versions: 3.0.5
>         Environment: Hibernate 3.0.5, MySQL, Tomcat
>            Reporter: Guido Laures
>            Priority: Minor
>
> When using an alias for an ORDER BY clause this is not always correctly resolved. Example:
> SELECT SUM(A.x) AS mySum FROM MyClass AS A GROUP BY A.y ORDER BY mySum
> does not work because "mySum" is not resolved in the ORDER BY clause which results in an exception telling that mySum is an unknown column.
> Workaround (not to say "hack") is using:
> SELECT SUM(A.x) AS mySum FROM MyClass AS A GROUP BY A.y ORDER BY col_0_0_

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