From: | Rod Taylor <rbt(at)rbt(dot)ca> |
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To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | PostgreSQL Development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: ALTER TABLE |
Date: | 2003-08-29 13:23:45 |
Message-ID: | 1062162671.80333.231.camel@jester |
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Lists: | pgsql-hackers |
On Thu, 2003-08-28 at 23:22, Tom Lane wrote:
> Rod Taylor <rbt(at)rbt(dot)ca> writes:
> > I've been fiddling away on ALTER TABLE and have a few questions about a
> > possible datatype change. Just alter portions.
>
> > I presume I'll need to do a table rewrite. What is the best way to
> > change a single datum? heap_modify() takes a single relation type where
> > I will need to deal with different types. Simply build a new tuple with
> > old datums (easy enough)? Do we care about OIDs being renumbered?
>
> Have you consulted the archives? ISTM we discussed these issues to
> death a year or two back.
I thought I had. Google doesn't give anything overly useful in a group
search for 'alter table modify' or 'alter table change type'
Found a nice long thread on dropping a column though. The discussion
about SET / DROP NOT NULL had a little bit on modify.
If you could point me in the right direction it would be appreciated.
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