Log Message:
-----------
Revert the logic for expanding AND/OR conditions in pred_test() to what
it was in 7.4, and add some comments explaining why it has to be this way.
I broke it for OR'd index predicates in a fit of code cleanup last summer.
Per example from Sergey Koshcheyev.
Modified Files:
--------------
pgsql/src/backend/optimizer/path:
indxpath.c (r1.167 -> r1.168)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/indxpath.c.diff?r1=1.167&r2=1.168)