Re: how to clean dropped column in pg_attribute

From: hubert depesz lubaczewski <depesz(at)depesz(dot)com>
To: ZongtianHou <zongtianhou(at)icloud(dot)com>
Cc: pgsql-admin <pgsql-admin(at)postgresql(dot)org>
Subject: Re: how to clean dropped column in pg_attribute
Date: 2020-09-08 09:49:17
Message-ID: 20200908094917.GA11563@depesz.com
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On Tue, Sep 08, 2020 at 05:38:24PM +0800, ZongtianHou wrote:
> I found dropped columns still exist in pg_attribute table. In the
> below example I drop c2 column and vacuum (full) this table and
> pg_attribute, it still exist (the last row). how can I clean it away?

Unfortunately only by copying the table aside, and then renaming new
table.

But - the dropped attribute will not sure any disk space, as long as you
ran some vacuums.

Best regards,

depesz

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