On Tue, Mar 22, 2005 at 08:09:40 -0500,
Christopher Browne <[EMAIL PROTECTED]> wrote:
>
> Are you certain it's a linear system? I'm not. If it was a matter of
> minimizing a linear expression subject to some set of linear
> equations, then we could model this as a Linear Program for which
> there are some perfectly good solvers available. (Few with BSD-style
> licenses, but we could probably get some insight out of running for a
> while with something that's there...)

## Advertising

For less than 100 equations and 100 unknowns, you should be able to use
naive solvers. After that you don't get very accurate answers without
being more careful. I still have my numerical analysis text books around
and can look algorithms up for doing this without too much trouble.
---------------------------(end of broadcast)---------------------------
TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match