Sorry for my last blank post, anyway, im not sure this helps but have
you tried using EXPLAIN?

Dexter Tad-y


On Mon, 2004-03-08 at 17:41, sferriol wrote:
> hello
> in a 'SELECT', does postgres read the 'WHERE' condition from left to right.
> 
> for example
> 1) select ... where a and b;
> 2) select ... where b and a;
> 
> 1 and 2 will use the same cpu time or not ?
> 
> sylvain


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