Re: Add SQL function to show total block numbers in the relation - Mailing list pgsql-hackers

From btkimurayuzk
Subject Re: Add SQL function to show total block numbers in the relation
Date
Msg-id 7369fa1cc4d212cbcbd2cdbd6031f0c0@oss.nttdata.com
Whole thread Raw
In response to Re: Add SQL function to show total block numbers in the relation  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Add SQL function to show total block numbers in the relation  (Kyotaro Horiguchi <horikyota.ntt@gmail.com>)
List pgsql-hackers
> btkimurayuzk <btkimurayuzk@oss.nttdata.com> writes:
>> I propose new simple sql query, which shows total block numbers in the
>> relation.
>> ...
>> Of cource, we can know this value such as
>> select (pg_relation_size('t') /
>> current_setting('block_size')::bigint)::int;
> 
> I don't really see why the existing solution isn't sufficient.

I think it's a little difficult to introduce the block size using two 
values `current block size` and `reference size`
for beginners who are not familiar with the internal structure of 
Postgres,

This is the reason why the existing solution was insufficient.

What do you think?

Regards,
Yu Kimura



pgsql-hackers by date:

Previous
From: btkimurayuzk
Date:
Subject: Re: pgbench - extend initialization phase control
Next
From: Gilles Darold
Date:
Subject: Re: [PATCH][DOC] Fix for PREPARE TRANSACTION doc and postgres_fdwmessage.