Re: pgbench: Skipping the creating primary keys after initialization

From: Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pgbench: Skipping the creating primary keys after initialization
Date: 2017-08-03 18:24:58
Message-ID: alpine.DEB.2.20.1708031820090.16606@lancre
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>> For the CREATE stuff, the script language is SQL, the command to use it is
>> "psql"...
>
>> The real and hard part is to fill tables with meaningful pseudo-random
>> test data which do not violate constraints for any non trivial schema
>> involving foreign keys and various unique constraints.
>
>> The solution for this is SQL for trivial cases, think of:
>> "INSERT INTO Foo() SELECT ... FROM generate_series(...);"
>
> Yeah. I was also thinking that complicated data-generation requirements
> could be handled with plpgsql DO blocks, avoiding the need for hard-wired
> code inside pgbench.

I do not thing that it is really be needed for what pgbench does, though.
See attached attempt, including a no_foreign_keys option.

The only tricky thing is to have the elapsed/remaining advancement report
on stdout, maybe with some PL/pgSQL.

Timings are very similar compared to "pgbench -i".

--
Fabien.

Attachment Content-Type Size
pgbench_init.sql application/x-sql 3.0 KB

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