Re: Whatever happened to BS-12?
Date: 21 Nov 2006 10:12:19 -0800
Cost based optimization (enumerating join orders and evaluating their cost) AFAIK is credited to System R. This contribution alone overweights all that vague talk about "superior null and duplicate treatments". Ironically, some of IBM competitors were running for quite a while sucessfully with a very unsophisticated optimizer! Received on Tue Nov 21 2006 - 19:12:19 CET