On 23 August 2010 19:25, Joseph Adams <joeyadams3.14...@gmail.com> wrote: > On Mon, Aug 23, 2010 at 1:54 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: >> "Andrew Dunstan" <and...@dunslane.net> writes: >>> On Mon, August 23, 2010 11:49 am, Alvaro Herrera wrote: >>>> What do you need AFTER for? Seems to me that BEFORE should be enough. >>>> (You already have the unadorned syntax for adding an item after the last >>>> one, which is the corner case that BEFORE alone doesn't cover). >> >>> You're right. Strictly speaking we don't need it. But it doesn't hurt much >>> to provide it for a degree of symmetry. >> >> I'm with Alvaro: drop the AFTER variant. It provides more than one way >> to do the same thing, which isn't that exciting, and it's also going to >> make it harder to document the performance issues. Without that, you >> can just say "ADD BEFORE will make the enum slower, but plain ADD won't" >> (ignoring the issue of OID wraparound, which'll confuse matters in any >> case). > > But what if you want to insert an OID at the end? You can't do it if > all you've got is BEFORE: > > CREATE TYPE colors AS ENUM ('red', 'green', 'blue'); > > If I want it to become ('red', 'green', 'blue', 'orange'), what am I to do? >
ALTER TYPE colors ADD 'orange'; -- Thom Brown Registered Linux user: #516935 -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers