Re: pgbench - add \aset to store results of a combined query

Поиск
Список
Период
Сортировка
От Fabien COELHO
Тема Re: pgbench - add \aset to store results of a combined query
Дата
Msg-id alpine.DEB.2.21.1911291013490.12886@pseudo
обсуждение исходный текст
Ответ на Re: pgbench - add \aset to store results of a combined query  (Michael Paquier <michael@paquier.xyz>)
Ответы Re: pgbench - add \aset to store results of a combined query  (David Steele <david@pgmasters.net>)
Re: pgbench - add \aset to store results of a combined query  (Michael Paquier <michael@paquier.xyz>)
Список pgsql-hackers
Michaël,

> +   bool        aset;
>
> It seems to me that there is no point to have the variable aset in 
> Command because this structure includes already MetaCommand, so the 
> information is duplicated. [...] Perhaps I am missing something?

Yep. ISTM that you are missing that aset is not an independent meta 
command like most others but really changes the state of the previous SQL 
command, so that it needs to be stored into that with some additional 
fields. This is the same with "gset" which is tagged by a non-null 
"varprefix".

So I cannot remove the "aset" field.

> And I would suggest to change readCommandResponse() to use a MetaCommand 
> in argument.

MetaCommand is not enough: we need varprefix, and then distinguishing 
between aset and gset. Although this last point can be done with a 
MetaCommand, ISTM that a bool is_aset is clear and good enough. It is 
possible to switch if you insist on it, but I do not think it is 
desirable.

Attached v4 removes an unwanted rebased comment duplication and does minor 
changes while re-reading the code.

-- 
Fabien.
Вложения

В списке pgsql-hackers по дате отправления:

Предыдущее
От: Peter Eisentraut
Дата:
Сообщение: Re: allow_system_table_mods stuff
Следующее
От: Amit Kapila
Дата:
Сообщение: Re: dropdb --force