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From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: Ildus Kurbangaliev <i.kurbangaliev@postgrespro.ru>
Cc: Евгений Шишкин <itparanoia@gmail.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Oleg Bartunov <obartunov@gmail.com>
Cc: Craig Ringer <craig@2ndquadrant.com>
Cc: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Subject: Re: [HACKERS] Custom compression methods
Date: Fri, 1 Dec 2017 18:53:40 -0300
Message-ID: <20171201215340.ymn4qehpefayxuf3@alvherre.pgsql> (raw)
In-Reply-To: <bc4e4595-24c5-c2eb-323e-9f31e9c98140@2ndquadrant.com>

Tomas Vondra wrote:

> On 12/01/2017 08:48 PM, Alvaro Herrera wrote:

> > Maybe our dependency code needs to be extended in order to support this.
> > I think the current logic would drop the column if you were to do "DROP
> > COMPRESSION .. CASCADE", but I'm not sure we'd see that as a feature.
> > I'd rather have DROP COMPRESSION always fail instead until no columns
> > use it.  Let's hear other's opinions on this bit though.
> 
> Why should this behave differently compared to data types? Seems quite
> against POLA, if you ask me ...

OK, DROP TYPE sounds good enough precedent, so +1 on that.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services




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