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From "Rick Curtis (JIRA)" <>
Subject [jira] [Created] (OPENJPA-2039) FKs for EAGER fields that are not in the current fetchplan aren't selected
Date Wed, 10 Aug 2011 22:05:27 GMT
FKs for EAGER fields that are not in the current fetchplan aren't selected

                 Key: OPENJPA-2039
             Project: OpenJPA
          Issue Type: Bug
          Components: jdbc
    Affects Versions: 2.1.1, 2.2.0
            Reporter: Rick Curtis
            Assignee: Rick Curtis

I am testing a scenario where I have an Entity with a number of eager/lazy relationships and
at runtime, using a FetchPlan, I want to mark all relationships as lazy. I was able to hack
around a bug reported previously on this list about not being able to remove fields from a
fetch plan by creating a new fetch plan, removing the default fetch group, and re-adding all
fields you want back into the new fetch plan. This all seems to work.

I found that owned *toOne relationships that are marked as lazy via annotations we will select
the foreign keys. If the relationships were marked as eager, we don't select the foreign keys.
This is where I believe the bug is. In JDBCStoreManager.optSelect(...) we have a bit of code
that looks to see if a field is a not a part of the default fetch group, and if it was not
removed explicitly. This is wrong because for the sake of the load that is in progress, I'm
not using the default fetch group.

With this JIRA I'd like to remove the two conditionals '!fm.isInDefaultFetchGroup() &&
!fm.isDefaultFetchGroupExplicit()' so that we will load the fks for lazy and eager marked

This seems safe enough to do as worst case, we will select an extra field from a table that
we are already selecting from. Best case, when accessing a lazy collection, we will issue
a select by FK rather than a select with a join.

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