From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: David G. Johnston <david.g.johnston@gmail.com>
Cc: Vik Fearing <vik@2ndquadrant.fr>
Cc: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Cc: denisa.cirstescu@asentinel.com, "pgsql-docs@postgresql.org" <pgsql-docs@postgresql.org>
Subject: Re: Undocumented behavior od DROP SCHEMA ... CASCADE
Date: Fri, 12 Aug 2016 17:32:05 -0400
Message-ID: <20160812213205.GA717717@alvherre.pgsql> (raw)
In-Reply-To: <20493.1471035687@sss.pgh.pa.us>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-docs>
Tom Lane wrote:
> Alvaro Herrera <alvherre@2ndquadrant.com> writes:
> > I think it'd be a good idea to add some more discoverability: what would
> > be deleted if an object X were to be deleted?
>
> There's plenty of discoverability already. The documentation suggests
>
> (If you want to check what <command>DROP ... CASCADE</> will do,
> run <command>DROP</> without <literal>CASCADE</> and read the
> <literal>DETAIL</> output.)
>
> Or you could do BEGIN; DROP ... CASCADE; ROLLBACK.
True, but the DETAIL is capped at 100 objects (per
reportDependentObjects); also, object locks need to be acquired, which
can be very troublesome if you discover that some frequently-used object
is in the set to be dropped, by some unfortunate accident.
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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Subject: Re: Undocumented behavior od DROP SCHEMA ... CASCADE
In-Reply-To: <20160812213205.GA717717@alvherre.pgsql>
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