Re: pgbench - adding pl/pgsql versions of tests

From: Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>
To: Hannu Krosing <hannuk(at)google(dot)com>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Dimitri Fontaine <dim(at)tapoueh(dot)org>
Subject: Re: pgbench - adding pl/pgsql versions of tests
Date: 2023-01-10 13:43:58
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> The attached patch adds pl/pgsql versions of "tpcb-like" and
> "simple-update" internal test scripts

Why not, it makes sense because it is relevant to some usage patterns.

Why not having the select version as a version as well?

If we are going to follow this road, we could also consider
"combined" queries with \; as well?

> $ pgbench -b list
> Available builtin scripts:
> tpcb-like: <builtin: TPC-B (sort of)>
> plpgsql-tpcb-like: <builtin: TPC-B (sort of) as a pl/pgsql function>
> simple-update: <builtin: simple update>
> plpgsql-simple-update: <builtin: simple update as a pl/pgsql function>
> select-only: <builtin: select only>
> which one can run using the -b / --builtin= option

ISTM that the -b had a fast selection so that only a prefix was enough to
select a script (-b se = -b select-only). Maybe such convenient shortcut
should be preserved, it seems that the long name will be needed for the pl

> And a flag --no-functions which lets you not to create the functions at init

Hmmm. Not so sure.

> there are also character flags to -I / --init ,
> -- Y to drop the functions and
> -- y to create the functions. Creating is default behaviour, but can
> be disabled fia long flag --no-functions )


> I selected Yy as they were unused and can be thought of as "inverted
> lambda symbol" :)


> If there are no strong objections, I'll add it to the commitfest as well

Please do that.

Fabien Coelho.

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