From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: Tatsuro Yamada <tatsuro.yamada.tf@nttcom.co.jp>
Cc: Julien Rouhaud <rjuju123@gmail.com>
Cc: Pavel Stehule <pavel.stehule@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: list of extended statistics on psql
Date: Sun, 30 Aug 2020 12:33:29 -0400
Message-ID: <20200830163329.GA21915@alvherre.pgsql> (raw)
In-Reply-To: <20200829225436.atuttqilrcgppqio@development>
On 2020-Aug-30, Tomas Vondra wrote:
> On Sat, Aug 29, 2020 at 06:43:47PM -0400, Alvaro Herrera wrote:
> > On 2020-Aug-29, Tomas Vondra wrote:
> > > Also, it might be useful to show the size of the statistics built, just
> > > like we show for \d+ etc.
> >
> > \dX+ I suppose?
>
> Right. I've only used \d+ as an example of an existing command showing
> sizes of the objects.
Yeah, I understood it that way too.
How can you measure the size of the stat objects in a query? Are you
thinking in pg_column_size()?
I wonder how to report that. Knowing that psql \-commands are not meant
for anything other than human consumption, maybe we can use a format()
string that says "built: %d bytes" when \dX+ is used (for each stat type),
and just "built" when \dX is used. What do people think about this?
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-hackers@postgresql.org
Cc: alvherre@2ndquadrant.com, tomas.vondra@2ndquadrant.com, tatsuro.yamada.tf@nttcom.co.jp, rjuju123@gmail.com, pavel.stehule@gmail.com, pgsql-hackers@lists.postgresql.org
Subject: Re: list of extended statistics on psql
In-Reply-To: <20200830163329.GA21915@alvherre.pgsql>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox