Very true, so I will give up on you then. RBS
> You can lead a horse to water but you cannot make it drink. > > [EMAIL PROTECTED] wrote: >> Yes, sure if it fails you might get wet, but I would try the few planks >> I >> got and see which one fits best and not bother with a mathematical >> model. >> All a bit academic as you don't know the situation >> I am dealing with. >> >> RBS >> >> >> >>>Absolutely. Big bridge or small bridge, if it fails you fall in the >>>water. >>> >>>It looks as if the bridge in Minneapolis failed because construction >>>workers moved tons of repaving material onto part of it and overstressed >>>that section. A few calculations could have saved the catastrophe. >>> >>>I saw an estimate that software errors cost just the US more than $100 >>>billion per year. That is equivalent to more than 5% of the entire UK >>>GDP. Doesn't it make sense to try to build software which works to >>>design rather than trying alternatives until one which does not fail >>>eventuates? >>> >>>Also note what early researchers in proof of software accuracy pointed >>>out. Testing only finds bugs, it does not establish the correctness of >>>a program. Only an appropriate design methodology can hope to establish >>>correct behaviour of the program. >>> >>>RB Smissaert wrote: >>> >>>>Poor comparison in this case. >>>>Are you going to make a mathematical model when you got a little stream >>>>to >>>>cross and you have a few available planks to do it? >>>> >>>>RBS >>>> >>>> >>>>-----Original Message----- >>>>From: John Stanton [mailto:[EMAIL PROTECTED] >>>>Sent: 05 August 2007 16:43 >>>>To: sqlite-users@sqlite.org >>>>Subject: Re: [sqlite] Re: Re: Re: Re: Re: Re: Re: How does SQLite >>>> choose >>>>the >>>>index? >>>> >>>>We learn mathematics etc so that we can make numerical models which >>>> give >>>>us design information. Imagine trying to build every combination of a >>>>bridge to settle on a design! >>>> >>>>Make a mathematical model and get it close to optimal at the first >>>>attempt. >>>> >>>>RB Smissaert wrote: >>>> >>>> >>>>>Yes, I suppose you are right there. >>>>>I will see if I can put together a report that runs all possible types >>>>>of >>>>>queries (sequentially) and then see if I have left anything out that >>>>>would >>>>>cause problems. >>>>> >>>>>RBS >>>>> >>>>> >>>>>-----Original Message----- >>>>>From: Gerry Snyder [mailto:[EMAIL PROTECTED] >>>>>Sent: 05 August 2007 03:35 >>>>>To: sqlite-users@sqlite.org >>>>>Subject: Re: [sqlite] Re: Re: Re: Re: Re: Re: Re: How does SQLite >>>>> choose >>>> >>>>the >>>> >>>> >>>>>index? >>>>> >>>>>RB Smissaert wrote: >>>>> >>>>> >>>>> >>>>>>.... I think an application that >>>>>>would produce all the needed indexes based on the table and all the >>>>> >>>>>possible >>>>> >>>>> >>>>> >>>>>>queries would be helpful. Anybody done such an app? >>>>> >>>>>_All_ possible queries? Not practical for any significant number of >>>>>columns. N factorial gets big fast. >>>>> >>>>>The indexes would be much larger than the data base itself. >>>>> >>>>>I'm afraid you are going to have to settle for doing an intelligent >>>>>design of the data base. >>>>> >>>>> >>>>>Gerry >>>>> >>>>> >>>>> >>>> >>>>---------------------------------------------------------------------------- >>>> >>>> >>>>>- >>>>>To unsubscribe, send email to [EMAIL PROTECTED] >>>>> >>>> >>>>---------------------------------------------------------------------------- >>>> >>>> >>>>>- >>>>> >>>>> >>>>> >>>>> >>>>> >>>> >>>>---------------------------------------------------------------------------- >>>>- >>>> >>>> >>>>>To unsubscribe, send email to [EMAIL PROTECTED] >>>>> >>>> >>>>---------------------------------------------------------------------------- >>>>- >>>> >>>> >>>> >>>>---------------------------------------------------------------------------- >>>>- >>>>To unsubscribe, send email to [EMAIL PROTECTED] >>>>---------------------------------------------------------------------------- >>>>- >>>> >>>> >>>> >>>> >>>>----------------------------------------------------------------------------- >>>>To unsubscribe, send email to [EMAIL PROTECTED] >>>>----------------------------------------------------------------------------- >>>> >>> >>> >>>----------------------------------------------------------------------------- >>>To unsubscribe, send email to [EMAIL PROTECTED] >>>----------------------------------------------------------------------------- >>> >>> >>> >> >> >> >> >> >> ----------------------------------------------------------------------------- >> To unsubscribe, send email to [EMAIL PROTECTED] >> ----------------------------------------------------------------------------- >> > > > ----------------------------------------------------------------------------- > To unsubscribe, send email to [EMAIL PROTECTED] > ----------------------------------------------------------------------------- > > > ----------------------------------------------------------------------------- To unsubscribe, send email to [EMAIL PROTECTED] -----------------------------------------------------------------------------
