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Re: ALTER TABLE - ALTER COLUMN question

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: kadams(at)mxlogic(dot)com
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: ALTER TABLE - ALTER COLUMN question
Date: 2007-05-29 21:16:59
Message-ID: 17811.1180473419@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-admin
Keaton Adams <kadams(at)mxlogic(dot)com> writes:
> In this example the created and msg_datetime columns are currently
> defined as TIMESTAMP WITHOUT TIME ZONE and no default.  If the alter
> table for these changes is not in-place then I would want to run it as a
> single alter with all of the changes, such as this, instead of
> individual alters for each change, correct?  (Because each individual
> alter would require another table copy?)

That's why ALTER TABLE has the ability to do more than one thing in
parallel ...

			regards, tom lane

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