On Sun, Mar 09, 2008 at 10:45:59PM +0100, Dawid Kuroczko wrote: > > alter table tab add column col integer not null default 42 check (col > 0); > > I think this will not solve the OP's problem. He wants to minimize the time > a table is under exclusive lock, and this ALTER command will effectively > rewrite the whole table (to add new not null column).
ISTM a while back someone adding a patch that made the above almost instantaneous. Probably remembering wrong though. Have a nice day, -- Martijn van Oosterhout <[EMAIL PROTECTED]> http://svana.org/kleptog/ > Please line up in a tree and maintain the heap invariant while > boarding. Thank you for flying nlogn airlines.
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