[hibernate-issues] [Hibernate-JIRA] Closed: (HHH-2647) Problems with OR parenthesis in HQL

[Steve Ebersole (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2647?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Ebersole closed HHH-2647.
-------------------------------

      Assignee: Steve Ebersole
    Resolution: Rejected

The first phase of the query parser actually groups and aligns the predicates according to your parenthesis; it changes the order in which they are evaluated (imagine, just like would happen in the sql's query translator!).

@Guillaume, @Denis Would it be ideal to be able to match the parenthesis from the input string into the output string.  Well *perhaps* (I personally think it is not necessary since as y'all are finding out the results are consistent).  However, this *will not* happen unless someone steps up and produces a patch for this.  It is extremely difficult to do and you get zero benefit for all that effort.

> Problems with OR parenthesis in HQL
> -----------------------------------
>
>                 Key: HHH-2647
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2647
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: query-hql
>    Affects Versions: 3.2.1
>         Environment: Hibernate 3.2.1, postgresql 8.2, jboss 5 embedded beta 2
>            Reporter: Dennis Fleurbaaij
>            Assignee: Steve Ebersole
>         Attachments: testcase.zip
>
>   Original Estimate: 15 minutes
>  Remaining Estimate: 15 minutes
>
> Given the following (part) of a query in HQL (where 1 to 6 are comparisons of different types (=, <=, is null), but irrelevant for the problem posted here ):
> AND ( ( 1 AND 2 ) OR ( 3 AND 4 )  OR ( 5 AND 6 ) )
> will be balanced to:
> and ( ( 1 ) and 2 or 3 and ( 4 ) or 5 and 6 )

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