Re: ALTER TABLESPACE ... MOVE ALL TO ...

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Stephen Frost <sfrost(at)snowman(dot)net>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: ALTER TABLESPACE ... MOVE ALL TO ...
Date: 2014-01-20 16:33:50
Message-ID: CA+U5nM+LQ6vy81LMQEQ_vx_TXpUwM-pURgxhO-gJxTgDdeNsGQ@mail.gmail.com
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On 20 January 2014 17:00, Stephen Frost <sfrost(at)snowman(dot)net> wrote:
> * Tom Lane (tgl(at)sss(dot)pgh(dot)pa(dot)us) wrote:
>> What if you're a superuser and you want to move everybody's objects
>> (perhaps in preparation for dropping the tablespace)? I think there's
>> value in both the ALL and OWNED forms.
>
> A superuser is considered to 'own' all objects and so 'ALL' and 'OWNED'
> above would be the same when issued by a superuser, in the current
> implementation.
>
> Looking at DROP OWNED and REASSIGN OWNED, they operate at the more
> specific level of "OWNED" == "relowner" rather than if the role is
> considered an 'owner' of the object through role membership, as you are
> implying above.
>
> As such, I'll rework this to be more in-line with the existing OWNED BY
> semantics of REASSIGN OWNED BY and DROP OWNED BY, which means we'd have:
>
> ALTER TABLESPACE name MOVE [ ALL | OWNED [ BY reluser ] ]
> [ TABLES | INDEXES | MATERIALIZED VIEWS ] TO name opt_nowait
>
> eg:
>
> ALTER TABLESPACE tblspc1 MOVE ALL TO tblspc2;
> ALTER TABLESPACE tblspc1 MOVE OWNED TO tblspc2;
> ALTER TABLESPACE tblspc1 MOVE OWNED BY myrole TO tblspc2;
> ALTER TABLESPACE tblspc1 MOVE TABLES OWNED BY myrole TO tblspc2;
> ALTER TABLESPACE tblspc1 MOVE ALL OWNED BY myrole TO tblspc2;

Sounds great, thanks.

--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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