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From: Michael Paquier <michael.paquier@gmail.com>
Date: Wed, 22 Nov 2017 23:36:34 +0900
Message-ID: 
 <CAB7nPqRZ-8BkUuF1UR+xzg3J+LDTcafbJ75DZGsfn+++iF5_aw@mail.gmail.com>
Subject: Re: libpq options
To: sahapasci@gmail.com
Cc: pgsql-docs@postgresql.org
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On Wed, Nov 22, 2017 at 10:27 PM,  <sahapasci@gmail.com> wrote:
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/9.6/static/libpq-connect.html
> Description:
>
> The documentation refers the libpq connection option &quot;replication&quot; here in
> &quot;Streaming Replication Protocol&quot; page;
>
> https://www.postgresql.org/docs/current/static/protocol-replication.html
>
> However the option &quot;replication&quot; is not clarified (or even listed) in libpq
> options page.
>
> https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-PARAMKEYWORDS
>
> I searched the source and find that pg_conn struct has this
>
> struct pg_conn
> {
> ...
>   char *replication; /* connect as the replication standby? */
> ...
> }
>
> Adding something simple like above and referring back to one of replication
> pages would be good I think.

Yeah, it is mainly a developer option which is why I guess it is not
documented. Like you, I think it should be added as part of the
connection parameter, and mentioned it a couple of days back:
https://www.postgresql.org/message-id/CAB7nPqQAtKfG3H%2BuK11JNivtJtZYE9yVCrPuejRMjp8tUDe0nQ%40mail.gmail.com
-- 
Michael