Andrew Dunstan <and...@dunslane.net> writes: > Robert Haas wrote: >> I like the idea of being able to modify enums on the fly, but I'm >> skeptical of an implementation that won't always work. Maybe it's >> still better than what we have now, but it seems grotty.
> I'd be perfectly happy to hear a reasonable alternative. Insert a sort order column into pg_enum, and rearrange the values in that whenever the user wants to add a new value in a particular place. You give up cheap comparisons in exchange for flexibility. I think lots of people would accept that tradeoff, especially if they could make it per-datatype. One point here is that you'd have to restrict the rearrangements so that the relative sort order of existing values never changes, else you break (for example) indexes on columns of that type. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers