From: Alvaro Herrera <alvherre@commandprompt.com>
To: Oliveiros C, <oliveiros.cristina@marktest.pt>
Cc: pgsql-sql@postgresql.org
Subject: Re: Is there any function to test for numeric ips?
Date: Fri, 11 Dec 2009 13:28:47 -0300
Message-ID: <20091211162847.GD30833@alvh.no-ip.org> (raw)
In-Reply-To: <E94D918326D044C69895D829038E31B2@marktestcr.marktest.pt>
References: <E94D918326D044C69895D829038E31B2@marktestcr.marktest.pt>
Oliveiros C, wrote:
> I've realized that, for ex, inet 'x.x.x.x' will fail if the input is not a numeric IP,
> is there any simple and direct way to somewhat trap that error and convert it to a false value that can be used
> in a WHERE clause?
Yes, you can create a plpgsql function with an exception block; return
false inside the exception, true otherwise. It looks something like
begin
perform $1::inet;
return true;
exception
when invalid_something then
return false
end;
I don't remember the exact syntax and the exception name but that should
get you started.
--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support
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To: pgsql-sql@postgresql.org
Cc: alvherre@commandprompt.com, oliveiros.cristina@marktest.pt
Subject: Re: Is there any function to test for numeric ips?
In-Reply-To: <20091211162847.GD30833@alvh.no-ip.org>
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