On Thu, Oct 12, 2006 at 10:59:23PM +1300, Mark Kirkwood wrote: > H.J. Sanders wrote: > > > why not just like in some other (commercial) databases: > > > > a statement to say: use index ............ > > > > I know this is against all though but if even the big ones can not resist > > the pressure of their users, why not? > > > > Yeah - some could not (e.g. Oracle), but some did (e.g. DB2), and it > seemed (to me anyway) significant DB2's optimizer worked much better > than Oracle's last time I used both of them (Oracle 8/9 and DB2 7/8). If someone's going to commit to putting effort into improving the planner then that's wonderful. But I can't recall any significant planner improvements since min/max (which I'd argue was more of a bug fix than an improvement). In fact, IIRC it took at least 2 major versions to get min/max fixed, and that was a case where it was very clear-cut what had to be done. -- Jim Nasby jim@xxxxxxxxx EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)
