On Thu, Jun 15, 2006 at 06:31:02AM +0200, Zoltan Boszormenyi wrote: > Jim C. Nasby ?rta: > >On Wed, Jun 14, 2006 at 01:30:10PM +0200, B?sz?rm?nyi Zolt?n wrote: > > > >>Replacing random() with a true constant gives me index scan > >>even if it's hidden inside other function calls. E.g.: > >> > > > >The database has no choice but to compute random() for every row; it's > >marked VOLATILE. > > > > I see now, docs about CREATE FUNCTION mentions random(), > currval() and timeofday() as examples for VOLATILE. > But where in the documentation can I find this info about all > built-in functions? Thanks. No, but you can query pg_proc for that info. The docs should have info about that table. -- Jim C. Nasby, Sr. Engineering Consultant jnasby@xxxxxxxxxxxxx Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
