On Mon, Mar 10, 2014 at 9:33 PM, Alvaro Herrera <alvhe...@2ndquadrant.com> wrote: > I haven't touched pg_dump yet, but if this proposed design sits well > with everyone, my intention is that the dump output will contain the > pg_register_option_namespace() calls necessary so that a table > definition will be able to do the SET calls to set the values the > original table has, and succeed. In other words, restoring a dump will > preserve the values you had, without a need of having the module loaded > in the new server. I think this is what was discussed. Robert, do you > agree?
No, I wasn't imagining anything like pg_register_option_namespace(). My thought was that you'd need to have any relevant modules loaded at restore time. In essence, patching in a new option via an extension module would work about like adding one by patching the core code: you need a server version that supports that option in order to set it. I don't like the idea of using reloptions to let people attach arbitrary unvalidated settings to tables. I consider the way things work with GUCs to be a bug, not a feature, and definitely not something I want to propagate into every other area of the system where the underlying storage format happens to allow it. I also kind of think that what you're going to find if you try to press forward with the pg_register_option_namespace() idea is that what you really want is CREATE RELOPTION NAMESPACE, ALTER RELOPTION NAMESPACE, DROP RELOPTION NAMESPACE. Short of that, you're going to end up with a bunch of kludges, I suspect. And some kind of real DDL syntax (with better naming) is OK with me, but as you observed elsewhere on the thread, now you're looking at a new catalog and a bunch more complexity. I kind of think that this is too half-baked for 9.4 and we ought to punt it to 9.5. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
