Re: alter table alter columns vs. domains

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Merlin Moncure" <merlin(dot)moncure(at)rcsonline(dot)com>
Cc: "PostgreSQL Development" <pgsql-hackers(at)postgresql(dot)org>, "Rod Taylor" <pg(at)rbt(dot)ca>, "Bruce Momjian" <pgman(at)candle(dot)pha(dot)pa(dot)us>
Subject: Re: alter table alter columns vs. domains
Date: 2004-05-06 19:02:06
Message-ID: 2575.1083870126@sss.pgh.pa.us
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"Merlin Moncure" <merlin(dot)moncure(at)rcsonline(dot)com> writes:
> Tom Lane wrote:
>> If we were willing to abuse the ALTER TABLE syntax some more, it would
>> be possible to support changing the datatypes of f1 and f2
>> simultaneously, thereby allowing the above to work.

> Just a clarification: isn't ALTER DOMAIN the best place to do this?

It's one way to do it, but not necessarily the only way.

A person who's needing to change their column datatypes has likely not
had the foresight to use domains either, so I don't feel entirely secure
saying that ALTER DOMAIN would solve all problems in this line.

regards, tom lane

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