> I'm not sure why deltas were implemented this way. Possibly it was designed > to behave like some of our object-to-relational libraries? In any case, > there are 2 ways to do deltas and you just have to take your pick based on > what will work best for your situation. I wouldn't consider the > "command=full-import&clean=false" method a workaround but just a different > way to tackle the same problem.
Yeah, I find the delta-update strategy a little strange as well. Problem with command=full-import&clean=false is that you can't handle removes nicely using that. If you use the actual delta-import and deletedPkQuery for that, you run into problems with last_index_time and miss either modifications or deletes. I'm handling that by creating a different entity config for updates (using command=full-import&clean=false) and deletes (using command=delta-import) but it ends up being much dirtier than it should be.
