CVSROOT: /cvsroot
Module name: pgsql-server
Changes by: tgl(at)svr1(dot)postgresql(dot)org 04/01/07 18:02:48
Modified files:
src/backend/optimizer/path: indxpath.c
Log message:
Make some improvements in the intelligence of the partial-index
predicate tester. It can now deal with commuted clauses (for
instance, 4 < x implies x > 3), subclauses more complicated than
a simple Var (for example, upper(x) = 't' implies upper(x) > 'a'),
and <> operators (for example, x < 3 implies x <> 4). Still
only understands operators associated with btree opclasses, though.
Inspired by example from Martin Hampl.