CVSROOT: /cvsroot
Module name: pgsql-server
Changes by: tgl@svr1.postgresql.org 04/02/27 17:48:04
Modified files:
src/backend/optimizer/util: restrictinfo.c
Log message:
Adjust remove_redundant_join_clauses() so that when it has a choice
of which redundant clause to remove, it removes the more expensive one.
In simple scenarios the clauses will be like 'var = var' and there's
no difference, but we are now capable of considering cases where there
are sub-selects in the clauses, and it makes a BIG difference.
