Re: list of extended statistics on psql

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>
Cc: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Tatsuro Yamada <tatsuro(dot)yamada(dot)tf(at)nttcom(dot)co(dot)jp>, Julien Rouhaud <rjuju123(at)gmail(dot)com>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: list of extended statistics on psql
Date: 2020-08-30 16:59:57
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Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> writes:
> On Sun, Aug 30, 2020 at 12:33:29PM -0400, Alvaro Herrera wrote:
>> 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?

Seems a little too cute to me.

> I'd use the same approach as \d+, i.e. a separate column with the size.
> Maybe that'd mean too many columns, though.

psql already has \d commands with so many columns that you pretty much
have to use \x mode to make them legible; \df+ for instance. I don't
mind if \dX+ is also in that territory. It'd be good though if plain
\dX can fit in a normal terminal window.

regards, tom lane

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