check if the same function is already running, then exit!

Started by Suresh Rajaabout 11 years ago3 messagesgeneral
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#1Suresh Raja
suresh.rajaabc@gmail.com

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,

#2Pavel Stehule
pavel.stehule@gmail.com
In reply to: Suresh Raja (#1)
Re: check if the same function is already running, then exit!

Hi

you can use a advisory locks for singleton implementation

http://www.postgresql.org/docs/9.4/static/functions-admin.html#FUNCTIONS-ADVISORY-LOCKS

Regards

Pavel

2015-01-26 20:58 GMT+01:00 Suresh Raja <suresh.rajaabc@gmail.com>:

Show quoted text

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,

#3Andy Colson
andy@squeakycode.net
In reply to: Suresh Raja (#1)
Re: check if the same function is already running, then exit!

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

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