Message-ID: <54C69DF3.1060305@squeakycode.net>
Date: Mon, 26 Jan 2015 14:05:07 -0600
From: Andy Colson <andy@squeakycode.net>
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64;
 rv:31.0) Gecko/20100101 Thunderbird/31.4.0
MIME-Version: 1.0
To: pgsql-general@postgresql.org
Subject: Re: check if the same function is already running, then
 exit!
References: 
 <CAJP7dtCgtdFvAKLmbP52u51HyVXqbxgkHQR+6yrKPcrhcpViRg@mail.gmail.com>
In-Reply-To: 
 <CAJP7dtCgtdFvAKLmbP52u51HyVXqbxgkHQR+6yrKPcrhcpViRg@mail.gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk
Sender: pgsql-general-owner@postgresql.org

On 1/26/2015 1:58 PM, Suresh Raja wrote:
> Before running a running a function, i would check only 1 instance is
> running.  If alreaady a function is running, the existing function
> should exist with the msg that already a function with same is running.
>
> If somebody has already used such a faeture, can u please share or
> Can you tell me the table and column from which I could this info.
>
> Thanks,

Advisory locks might work for you:

http://www.postgresql.org/docs/9.4/static/explicit-locking.html
(at the bottom of the page)

google will find other's talking about it:  "postgres advisory lock"

-Andy


-- 
Sent via pgsql-general mailing list (pgsql-general@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general