In the link below it says that relationships does not work across databases "as it will require Cayenne to do in memory cartesian product processing".
What does this qualifier mean? Does it mean that it is possible to enable this, but it would take a lot of memory? That this feature was considered, but rejected as it would have not worked in all cases? For the cases that we need this, there is no problem for Cayenne to have both tables completely in memory (always < 1000 records) so I'm not concerned about CPU processing power or memory consumption. Has any work been done on supporting this? We've got a real database (Derby) that has relationships to other existing datbases(MS Access/FoxPro databases). We can't move the existing databases into Derby due to bug-by-bug compatibility problems. http://cwiki.apache.org/CAY/multiple-databases-example.html -- Øyvind Harboe http://www.zylin.com - eCos ARM & FPGA developer kit
