Re: Error on pgbench logs

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От Fabien COELHO
Тема Re: Error on pgbench logs
Дата
Msg-id alpine.DEB.2.22.394.2106122329050.479449@pseudo
обсуждение исходный текст
Ответ на Re: Error on pgbench logs  (Yugo NAGATA <nagata@sraoss.co.jp>)
Ответы Re: Error on pgbench logs  (Tatsuo Ishii <ishii@sraoss.co.jp>)
Список pgsql-hackers
> +        while ((next = agg->start_time + agg_interval * INT64CONST(1000000)) <= now)
>
> I can find the similar code to convert "seconds" to "us" using casting like
>
> end_time = threads[0].create_time + (int64) 1000000 * duration;
>
> or
>
> next_report = last_report + (int64) 1000000 * progress;
>
> Is there a reason use INT64CONST instead of (int64)? Do these imply the same effect?

I guess that the macros does 1000000LL or something similar to directly 
create an int64 constant. It is necessary if the constant would overflow a 
usual 32 bits C integer, whereas the cast is sufficient if there is no 
overflow. Maybe I c/should have used the previous approach.

> Sorry, if this is a dumb question...

Nope.

-- 
Fabien.



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