On Wed, May 06, 2009 at 12:10:49PM -0400, Alvaro Herrera wrote: > Tom Lane wrote: > > Stephen Frost <sfr...@snowman.net> writes: > > > > Perhaps this is misguided but I would think that the regexp > > > libraries might have some support for "give me all anchored > > > required text for this regexp" which we could then use in the > > > planner. > > > > I wouldn't see why. It's certainly worth considering to hand the > > pattern to the regex engine and then burrow into the data > > structure it builds; but right now we consider that structure to > > be entirely private to backend/regex/. There's also the problem > > that we'd have no easy way to determine how much the result > > depends on the current regex flavor setting. There are some cases > > now where regex_fixed_prefix deliberately omits possible > > optimizations because of uncertainty about the flavor. > > I think changeable regex flavors turned out to be a bad idea.
+1 Cheers, David. -- David Fetter <da...@fetter.org> http://fetter.org/ Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter Skype: davidfetter XMPP: david.fet...@gmail.com Remember to vote! Consider donating to Postgres: http://www.postgresql.org/about/donate -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
