Zac Spitzer wrote: > Kay Smoljak wrote: > | > | A tip I picked up from somewhere - it might even have been this list > | - is to not ever actually delete records using code. Instead, I have > | a dtDeleted field, which is set to the current date when I want to > | delete the record. When doing selects, I add "WHERE dtDeleted IS > | NULL" to get only non-deleted records. > | > > good idea, badly implemented..... a select using a null criteria cannot > use a index and means the database must do a full table scan which means > ~ bad performance....try changing your logic round so you can use an > index...
That is just a limitation of your specific dbms. Others can use much fancier indexing schemes. (If your database supports it, look into partial indexes for this type of problem.) Jochem ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribe&forumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting. Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
