Hi David, Do you mind sending me your entity definitions for further investigation?
Regards, Fay ----- Original Message ---- From: David Minor <davemi...@gmail.com> To: users@openjpa.apache.org Sent: Thursday, July 2, 2009 9:38:47 AM Subject: Re: SQL generation for OneToMany object graph Fay, thanks for your reply! "openjpa.jdbc.EagerFetchMode" is currently set to parallel. "openjpa.jdbc.SubclassFetchMode" is set to parallel as well. The description of parallel mode seems to be exactly what I want to happen, but not what seems to be happening. Is there any other setting, or anything in the object graph that would prevent this behavior? > > > -----Original Message----- > From: Fay Wang [mailto:fyw...@yahoo.com] > Sent: Thursday, July 02, 2009 9:19 AM > To: users@openjpa.apache.org > Subject: Re: SQL generation for OneToMany object graph > > > Hi, it seems that you are using the Join strategy for your eager fetch > mode. Can you try parallel? > <property name="openjpa.jdbc.EagerFetchMode" value="parallel"/> > > Fay > > > > ----- Original Message ---- > From: David Minor <davemi...@gmail.com> > To: users@openjpa.apache.org > Sent: Monday, June 29, 2009 5:23:25 PM > Subject: SQL generation for OneToMany object graph > > Hi, > > If I have a deep object graph with a root element that has OneToMany > relationships with other elements, and those have OneToMany > relationships (and so on), and all the objects are included via a fetch > group, how does openjpa decide how to generate the SQL for a statement > like: > > "SELECT r FROM RootElement r WHERE r.uid IN (:list)" > > Looking at the SQL logging (this is using mysql BTW), the initial > statements use an OR to select among rows in the root element's table, > and some of the other initial tables, but then it seems to start issuing > individual SELECT statements as it gets deeper into the graph. > Is there any way to make it use OR combined with JOIN statements > instead? > > Thanks, > Dave > > -- > _____________ > David Minor > > > > > > > > -- _____________ David Minor
