On 02.05.2013 08:43, Pavan Deolasee wrote:
Hi All,
While looking at the help message of pg_basebackup, I got a bit confused by
it. It looks something like this:
Connection options:
-d, --dbname=CONNSTR connection string
So the long option says "--dbname" which is not really what its expecting.
The same issue also applies to pg_receivexlog and pg_dumpall. I wonder if
this is a well thought out user API or just an oversight when we chose to
use "-d" to pass connection string to the command, In fact, I would have
avoided using either -d or --dbname because they are used very frequently
in other commands to mean something else.
It's deliberate, although I admit it's confusing. The manual explains it:
-d connstr
--dbname=connstr
Specifies parameters used to connect to the server, as a connection string.
See Section 31.1.1 for more information.
The option is called --dbname for consistency with other client
applications, but because pg_basebackup doesn't connect to any particular
database in the cluster, database name in the connection string will be ignored.
In other tools too, like psql, you can pass a connection string with
-d/--dbname, which is why I thought it would be best to use the same
option for passing a connection string to pg_basebackup/pg_dumpall too.
See discussion at
http://www.postgresql.org/message-id/512520fe.6050...@vmware.com. If you
have any better ideas, I'm all ears...
- Heikki
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