Re: pgbench - allow to create partitioned tables

From: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
To: Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>
Cc: Asif Rehman <asifr(dot)rehman(at)gmail(dot)com>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: pgbench - allow to create partitioned tables
Date: 2019-09-17 12:16:24
Message-ID: CAA4eK1Jd5FCXH_=i=yr2u8na6T7PKw0dY3ipU739qyjKaY+JBg@mail.gmail.com
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On Tue, Sep 17, 2019 at 4:24 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> On Sat, Sep 14, 2019 at 6:35 PM Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> wrote:
>
> One more comment:
> +typedef enum { PART_NONE, PART_RANGE, PART_HASH, PART_UNKNOWN }
> + partition_method_t;
>
> See, if we can eliminate PART_UNKNOWN. I don't see much use of same.
> It is used at one place where we can set PART_NONE without much loss.
> Having lesser invalid values makes code easier to follow.
>

Looking more closely at this case:
+ else if (PQntuples(res) != 1)
+ {
+ /* unsure because multiple (or no) pgbench_accounts found */
+ partition_method = PART_UNKNOWN;
+ partitions = 0;
+ }

Is it ever possible to have multiple pgbench_accounts considering we
have unique index on (relname, relnamespace) for pg_class?

--
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com

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