[Hibernate-issues] [Hibernate-JIRA] Created: (HHH-1296) Non lazy loaded List updates done in wrong order, cause exception

[David B. (JIRA) <no...@at...>]

Non lazy loaded List updates done in wrong order, cause exception
-----------------------------------------------------------------

         Key: HHH-1296
         URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1296
     Project: Hibernate3
        Type: Bug
  Components: core  
    Versions: 3.0.5    
 Environment: Hibernate 3.0.5 - any database (checked postgres 7/8, mysql 4 & 5, db2 v8)
NOT using lazy loading - the tx's are wrapped by session beans, so lazy loading is not allowed.
 Reporter: David Birch
    Priority: Critical


The logic behind list updates is not quite right, nor was it in v2 (only now i have a DBA who won't let up...)

The scenario is:
a bean with list property, and the list has a number of items in it (say 4, index 0-3), an item is then removed (say item at index 2), and the bean is requested to be saved.

From what i can see in the SQL traces, the same statements are issues whe lazy loading is on or off, they are:

[18/12/05 19:48:50:766 EST] 00000036 SystemOut     O Hibernate: delete from TGE_CLIENT_POLICY where CLIENT_ID=? and POSITION=?
[18/12/05 19:48:50:766 EST] 00000036 SystemOut     O Hibernate: update TGE_CLIENT_POLICY set POLICY_NK=? where CLIENT_ID=? and POSITION=?

So, i can only assume (as when this fails, the row with index 1 above the removed row is nuked!), hibernate removes the item at index 3, and then copies the value of the item at index 3 onto the row for item at index 2. Fair enough but...
When i have lazy loading off, i get DB exceptions like

Duplicate key or integrity constraint violation message from server: "Duplicate entry '1-999999' for key 1"

so, there is some nasty in there, which is not updating the correct row - this has happened since 2.1.8 that i know of :(

i will try & look @ the source, but won't get a chance until after xmas...

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
   http://opensource.atlassian.com/projects/hibernate/secure/Administrators.jspa
-
For more information on JIRA, see:
   http://www.atlassian.com/software/jira