[hibernate-issues] [Hibernate-JIRA] Created: (HHH-1981) Id generation strategy effects constraint checking timing

[Emir Uner (JIRA)]

Id generation strategy effects constraint checking timing
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         Key: HHH-1981
         URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1981
     Project: Hibernate3
        Type: Bug

  Components: core  
    Versions: 3.1.3    
 Environment: Linux, PostgreSQL 8.1.4
    Reporter: Emir Uner
    Priority: Minor


The id generation strategy affects the timing of the constraints checking.
In our project, in a table there is a unique constraint for a column.

When we specify "identity" id generation strategy the unique constraint
viloation is detected as soon as we call saveOrUpdate.

But if we specify "native" id generation strategy, (possibly results in
"sequence" generator in PostgreSQL) the violation is not detected
until a manual flush call is made or transaction commited.


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