Re: ExplainProperty* and units

From: Andres Freund <andres(at)anarazel(dot)de>
To: David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: ExplainProperty* and units
Date: 2018-03-14 16:07:09
Message-ID: 20180314160709.cuxyq5v22mgien4i@alap3.anarazel.de
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Hi,

On 2018-03-14 14:34:38 +1300, David Rowley wrote:
> On 14 March 2018 at 13:27, Andres Freund <andres(at)anarazel(dot)de> wrote:
> > In the attached *POC* patch I've added a 'unit' parameter to the numeric
> > ExplainProperty* functions, which EXPLAIN_FORMAT_TEXT adds to the
> > output. This can avoid the above and other similar branches (of which
> > the JIT patch would add a number).
>
> > Comments?
>
> This seems like a good change.

Cool.

> It would be nice to see us completely get rid of all the
> appendStringInfo* calls, apart from in the functions which meant to
> handle the behaviour specific to the explain format. This is a step
> towards that, so has my vote.

Do you mean you want to only use ExplainProperty*? Given the desire of
density for plan output that seem hard to achieve.

> Functions like show_hash_info are making it difficult to do more in this area.

Hm, what's the problem?

Greetings,

Andres Freund

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