Re: ALTER TABLE MODIFY COLUMN

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Mark Butler <butlerm(at)middle(dot)net>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: ALTER TABLE MODIFY COLUMN
Date: 2001-04-13 06:36:35
Message-ID: 2994.987143795@sss.pgh.pa.us
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Mark Butler <butlerm(at)middle(dot)net> writes:
> Surely if we have an write exclusive table lock we can rewrite tuples
> in place rather than creating new versions with its corresponding 2x
> space requirement.

Nyet. Consider transaction rollback.

regards, tom lane

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