CVSROOT: /home/projects/pgsql/cvsroot
Module name: pgsql
Changes by: tgl(at)hub(dot)org 01/02/15 19:03:08
Modified files:
src/include/optimizer: cost.h pathnode.h
src/backend/optimizer/path: costsize.c joinrels.c
src/backend/optimizer/util: relnode.c
Log message:
Take OUTER JOIN semantics into account when estimating the size of join
relations. It's not very bright, but at least it now knows that
A LEFT JOIN B must produce at least as many rows as are in A ...