If your result list is not expected to contain ClassTwo objects, you won’t see any blobs. But if it is - you will get fully resolved ClassTwo objects, including the BLOB attribute.
So perhaps BLOB should be placed in a separate table and lazily resolved via relationship? Andrus On Dec 20, 2013, at 10:49 AM, do...@xsinet.co.za wrote: > Thanks for asking Andrus: > > Because ClassTwo contains a BLOB that I don't want retrieved when asking for > ClassOne objects. > > Jurgen > > > -----Original Message----- From: Andrus Adamchik > Sent: Friday, December 20, 2013 8:58 AM > To: user@cayenne.apache.org > Subject: Re: Inheritance Question > > No. > > But a question though - if the result set only contains ClassOne rows, why > would you care about inclusion of all those extra columns in the SELECT? > > Andrus > > On Dec 20, 2013, at 9:50 AM, do...@xsinet.co.za wrote: > >> Thanks for your reply Andrus. >> >> I don't suppose that there is a way to tell Cayenne not to be so eager in >> this case ? >> >> Jurgen >> >> >> -----Original Message----- From: Andrus Adamchik >> Sent: Friday, December 20, 2013 8:27 AM >> To: user@cayenne.apache.org >> Subject: Re: Inheritance Question >> >> From what I can tell, this is the intended behavior. If your SelectQuery >> root is ClassOne, Cayenne expects that the result might contain a mix of >> ClassOne and any of its subclasses (which means ClassTwo as well). So the >> columns in SELECT are a superset of columns for all the classes involved. >> >> Andrus >> >> >> On Dec 12, 2013, at 12:30 PM, do...@xsinet.co.za wrote: >>> Hi All >>> >>> I have a dbEntity say ClassOne (its lightweight) and another that inherits >>> from it as ClassTwo (its heavyweight). >>> >>> Now in my case I have a prefetch that retrieves ClassOne objects. >>> >>> The problem that I have is that Cayenne is fetching ClassTwo data as well ?! >>> >>> Surely Cayenne should only be fetching the ClassOne data, why is ClassTwo >>> data also being retrieved ? >>> >>> Is this the intended behaviour ? Is there a way to prevent it ? >>> >>> Thanks, Jurgen >>> >>> >>> >> >> > >
