Re: add PROCESS_MAIN to VACUUM

On Thu, Mar 02, 2023 at 02:21:08PM +0900, Michael Paquier wrote:
> On Thu, Mar 02, 2023 at 12:58:32PM +0900, Masahiko Sawada wrote:
>> Cutting the toast relation name to 'pg_toast' is a bit confusing to me
>> as we have the pg_toast schema. How about using the following query
>> instead to improve the readability?
>>
>> SELECT
>> CASE WHEN c.relname IS NULL THEN
>> s.relname
>> ELSE
>> 'toast for ' || c.relname
>> END as relname,
>> s.vacuum_count
>> FROM pg_stat_all_tables s
>> LEFT JOIN pg_class c ON s.relid = c.reltoastrelid
>> WHERE c.relname = 'vactst' OR s.relname = 'vactst'
>
> Another tweak that I have learnt to like is to apply a filter with
> regexp_replace(), see 090_reindexdb.pl:
> regexp_replace(b.indname::text, '(pg_toast.pg_toast_)\\d+(_index)', '\\1<oid>\\2')
>
> If you make that part of the view definition, the result is the same,
> so that's up to which solution one prefers.

Here's a new version of the patch that uses Sawada-san's suggestion.
Thanks for taking a look.

--
Nathan Bossart
Amazon Web Services: https://aws.amazon.com