Kevin Brown <kevin@sysexperts.com> writes:
> I'm looking at the code now (the 7.2.3 code in particular, but I
> suspect for this purpose the code is likely to be very similar to the
> CVS tip), but it's all completely new to me and the developer
> documentation isn't very revealing of the internals. The optimizer
> code (I've been looking especially at make_jointree_rel() and
> make_fromexpr_rel()) looks a bit tricky...it'll take me some time to
> completely wrap my brain around it. Any pointers to revealing
> documentation would be quite helpful!
src/backend/optimizer/README is a good place to start.
I'd recommend working with CVS tip; there is little point in doing any
nontrivial development in the 7.2 branch. You'd have to port it forward
anyway.
regards, tom lane