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Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 3 posts ] 
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 Post subject: HQL Query result
PostPosted: Wed Nov 01, 2006 2:00 am 
Newbie

Joined: Wed Oct 18, 2006 7:29 am
Posts: 11
can anyone suggest me why this query gives duplicate results, despite of being only one in the database

public List<Bug> findAllBugs() {
Session session = getHibernateTemplate().getSessionFactory()
.getCurrentSession();
String SQL_QUERY = "from Bug as bug inner join fetch bug.users as users";
log.info(SQL_QUERY);
Query query = session.createQuery(SQL_QUERY);
return query.list();
}


i have a 2 table named USERS and BUGS mapped as many to many, so the association table is BUG_USER
+--------+---------+
| BUG_ID | USER_ID
+--------+---------+
| 4 | 1 |
| 4 | 2 |
+--------+---------+

here bug with id 4 is assigned to to users with id 1, and 2

so is there any thing wrong in the query
i m really sick with this......................


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 Post subject:
PostPosted: Wed Nov 01, 2006 9:56 am 
Newbie

Joined: Mon Sep 18, 2006 6:34 am
Posts: 18
Hi puran,

if what I gather is correct then the query is returning the right data although to clarify it you might post up the contents of both tables. But if you have the following:

USER
ID NAME etc
1 Bob ...
2 Fred ...

and BUGS
ID USER_ID BUG_DATE etc
4 1 2006-10-31 ...
4 2 2006-11-01 ...

Then
+--------+---------+
| BUG_ID | USER_ID
+--------+---------+
| 4 | 1 |
| 4 | 2 |
+--------+---------+

will be right.

Generally though it wouldn't be considered right to have a many to many relationship and the primary keys would be broken up into an intermediate table USER_BUGS i.e.
USER_ID BUG_ID etc
1 4
2 4

and BUGS would change to
ID BUG_DATE etc
4 2006-11-01 ...

To search then you'd look at the intermediate table, USER_BUGS and use the foreign keys to look up user/bug data.


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 Post subject:
PostPosted: Fri Nov 03, 2006 5:48 am 
Newbie

Joined: Wed Oct 18, 2006 7:29 am
Posts: 11
hi johnny thanx for a reply

u got right but


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