Re: Usage of pg_waldump

From: Andres Freund <andres(at)anarazel(dot)de>
To: Dang Minh Huong <kakalot49(at)gmail(dot)com>
Cc: "pgsql-bugs(at)lists(dot)postgresql(dot)org" <pgsql-bugs(at)lists(dot)postgresql(dot)org>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Usage of pg_waldump
Date: 2018-05-01 16:26:30
Message-ID: 20180501162630.ht426rxwfmqxg74j@alap3.anarazel.de
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Hi,

On 2018-05-01 16:41:04 +0900, Dang Minh Huong wrote:
> The syntax is known as,
>
> pg_waldump [OPTION]... [STARTSEG [ENDSEG]]
>
> Mean that, it could work with no arguments.
> But the "no arguments specified" ERROR will be returned in that case.
>
> $ pg_waldump
> pg_waldump: no arguments specified
> Try "pg_waldump --help" for more information.
>
> I wonder it should be,
>
> pg_waldump { OPTION... [STARTSEG [ENDSEG]] } | { [OPTION]... STARTSEG [ENDSEG] }
>
> Have any comments?

To me that doesn't seem like an improvement, looks a good chunk more
complicated. You'll get the error and the docs also tell you that some
arguments are needed.

Greetings,

Andres Freund

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