As a starting point, you can look at these two functions:
src/backend/optimizer/path/indxpath.c : find_usable_indexes()
src/backend/optimizer/util/pathnode.c : add_path()
Hope this helps.
On 12/20/06, Felipe Rondon Rocha <frondon@globo.com> wrote: Hi,
can you halp me?
Thks,
Felipe
----- Original Message -----
From: "Martijn van Oosterhout" <kleptog@svana.org>
To: "Felipe Rondon Rocha" < frondon@globo.com>
Sent: Tuesday, December 19, 2006 8:39 AM
Subject: Re: Fw: [HACKERS] choosing use an index or not
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
--
gurjeet[.singh]@EnterpriseDB.com
singh.gurjeet@{ gmail | hotmail | yahoo }.com