Robert Haas wrote:
People who upgrade via pg_dump will automatically get the new and improved widget type because that is what is now called widget. But people who in-place upgrade will end up with the old_shitty_widget type. Then you just run some dead simple postupdate script that goes through and issues ALTER TABLE commands to change each old_shitty_widget column to a widget column.
Altering column type with ALTER TABLE needs to exclusively-lock and rewrite the whole table, so you might as well pg_dump+restore that table.
-- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
