pgsql-server/src/backend/optimizer/path indxpath.c

CVSROOT: /cvsroot
Module name: pgsql-server
Changes by: tgl@svr1.postgresql.org 04/03/07 01:43:53

Modified files:
src/backend/optimizer/path: indxpath.c

Log message:
When testing usability of a partial index, recognize that an index
predicate of the form 'foo IS NOT NULL' is implied by a WHERE clause
that uses 'foo' in any strict operator or function. Per suggestion
and preliminary implementation by John Siracusa; some further hacking
by moi.