openjpa-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Pinaki Poddar" <ppod...@bea.com>
Subject RE: question on FetchGroup
Date Fri, 08 Sep 2006 17:07:27 GMT
MaxFetchDepth is the upper limit of the number of relations traversed to
reach a node in the graph from the root object node. By default, it is
set to 1. -1 means infinte.
RecursionDepth controls the number of times a particular relation would
be traveresed in case of self-relation. Say Male has a relation field
"father" to another Male. If recusrion-depth is set to 3 for "father" --
a Male instance will also fetch his father, grandfather and
great-grandfather.   

A single depth being fetched irrespective of recursionDepth setting is
perhaps because maxFetchDepth is set to 1.      


Pinaki Poddar
BEA Systems
415.402.7317  


-----Original Message-----
From: David Wisneski [mailto:wisneskid@gmail.com] 
Sent: Thursday, September 07, 2006 11:19 PM
To: open-jpa-dev@incubator.apache.org
Subject: Re: question on FetchGroup

By "not working" I meant that irregardless of what value for
recursionDepth was specified ( we tried 0, 1, 2  ) only one level was
retrieved.  However we did not try changing the MaxFetchDepth property.

On 9/7/06, Abe White <awhite@bea.com> wrote:
>
> > But that does not seem to work.  Is this a code bug or is a document

> > error?
> >
> > Or an error in my understanding of FetchGroup depth ?
>
> Both a documentation error and a misunderstanding.  I'll try to update

> the docs later today.  In the meantime, I don't know what you mean 
> when you say it "does not seem to work", but one important note is 
> that the MaxFetchDepth is 1 by default, so if you want to fetch deep 
> relations, you'll need to increase that -- either on the FetchPlan or 
> using the openjpa.MaxFetchDepth configuration property.
> ______________________________________________________________________
> _
> Notice:  This email message, together with any attachments, may 
> contain information  of  BEA Systems,  Inc.,  its subsidiaries  and  
> affiliated entities,  that may be confidential,  proprietary,  
> copyrighted  and/or legally privileged, and is intended solely for the

> use of the individual or entity named in this message. If you are not 
> the intended recipient, and have received this message in error, 
> please immediately return this by email and then delete it.
>
_______________________________________________________________________
Notice:  This email message, together with any attachments, may contain
information  of  BEA Systems,  Inc.,  its subsidiaries  and  affiliated
entities,  that may be confidential,  proprietary,  copyrighted  and/or
legally privileged, and is intended solely for the use of the individual
or entity named in this message. If you are not the intended recipient,
and have received this message in error, please immediately return this
by email and then delete it.

Mime
View raw message