-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On Tue, Sep 15, 2009 at 10:28:28AM -0700, Jeff Davis wrote:
> On Tue, 2009-09-15 at 13:16 -0400, Robert Haas wrote:
> > Uhh.... so what happens if I create an index constraint using the
> > +(integer, integer) operator?
>
> You can use any operator that has an index search strategy. Overlaps is
> probably the most useful, but you could imagine other operators, like a
> bi-directional containment operator (either LHS is contained in RHS, or
> vice-versa).
>
> You can also get creative and have a "similarity" operator that
> determines whether two tuples are "too similar". As long as it is
> symmetric, the feature will work.
One question: does the operator have to be reflexive? I.e. "A op A holds
for all A"?
I am thinking "proximity" or as you state above "similarity". May be
this is a good metaphor, leading to a good name.
Regards
- -- tomás
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
iD8DBQFKsOPyBcgs9XrR2kYRAhsUAJkBICYUMK0tDrycPbctiGF7YKI/9gCeLQzq
DPyAAkMgZJFn8BZ7P8119/g=
=lVz1
-----END PGP SIGNATURE-----
