--- Larry Garfield <larry@xxxxxxxxxxxxxxxx> wrote: > For your rudimentary example of object-relational mapping below, yes, > performance is going to be atrocious. That's because you're not taking any > advantage of the features that using OOP gives you. Well, I /thought/ I was taking advantage of black box-style hiding (not sure what it's called), that is, making sure the only place I type (and modify) my SQL query is hidden inside the private method of a class. > Again, pull extra data if you can. A somewhat larger result set is (usually) > better than multiple queries. How much you want to front-load in your object > and how much you want to defer to later depends on your specific problem and > how frequently the data will be used. OK that somewhat answers the question. > 5) If you need to grab 100 objects at once, but just need basic data out of > them, use a factory. Vis, (code snipped) I /think/ I understand the code. But I'd need more than just basic data, so I probably will just write a query. > 6) If you need to do a complex query with a couple of joins and such, then > don't waste your time or the computer's trying to shoe-horn it into SQL. SQL > is not inherently OO to start with! Just write your query and loop it and be > happy. OOP is not the answer to all problems. Sometimes it does just make > matters worse, no matter what Sun tries to tell you. :-) LOL Yeah, I was thinking of shoe-horning things into SQL for speed. > > I want my data to _only_ be accessed from the black box called an OOP > > class. > > That will work and is achievable in about 30% of all situations. For the > other 70%, you will have to just hunker down and *gasp* write SQL specific to > the task at hand at least some of the time. How much of the time once again > depends on your situation and the problem you're trying to solve. *gasp* :-) >From what it seems like people are telling me, it's a good idea to boot OOP for large numbers of objects where I need more than just a little information and just use an SQL query, as I suspected. At least, for PHP; I wonder what Java people do in this situation. CD Think you're a good person? Yeah, right! ;-) Prove it and get ten thousand dollars: TenThousandDollarOffer.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
