Thread: PQstatus is getting blocked when database sytem powered off

PQstatus is getting blocked when database sytem powered off

From
"Sunil Khatri"
Date:
Hi,
In my application I need to check connection status before executing the query. I am doing it using PQstatus.
Problem is : PQstatus is getting blocked If the system on which database server is running is powered off.
If I shutdown the database using pg_ctl stop or pkill -9 postmaster in that case its returning.
 
Is there any other way to check the connection status in this case?
 
Thanks
Sk
 

Re: PQstatus is getting blocked when database sytem powered off

From
Tom Lane
Date:
"Sunil Khatri" <sunil@6dtech.co.in> writes:
> Problem is : PQstatus is getting blocked If the system on which database server is running is powered off.

Hardly likely, considering that PQstatus is just

ConnStatusType
PQstatus(const PGconn *conn)
{if (!conn)    return CONNECTION_BAD;return conn->status;
}


I have no doubt that a query-issuing call could get blocked if the
postmaster stops responding, but not PQstatus.
        regards, tom lane


Re: PQstatus is getting blocked when database sytem powered off

From
"Sunil Khatri"
Date:
Thanks for your reply.
You are right PQstatus is not blocking, query-issuing call is getting
blocked.
Is there any way for handling this blocking situation?

Regards
Sk
----- Original Message ----- 
From: "Tom Lane" <tgl@sss.pgh.pa.us>
To: "Sunil Khatri" <sunil@6dtech.co.in>
Cc: <pgsql-interfaces@postgresql.org>
Sent: Tuesday, July 22, 2008 10:58 PM
Subject: Re: [INTERFACES] PQstatus is getting blocked when database sytem 
powered off


> "Sunil Khatri" <sunil@6dtech.co.in> writes:
>> Problem is : PQstatus is getting blocked If the system on which database 
>> server is running is powered off.
>
> Hardly likely, considering that PQstatus is just
>
> ConnStatusType
> PQstatus(const PGconn *conn)
> {
> if (!conn)
> return CONNECTION_BAD;
> return conn->status;
> }
>
>
> I have no doubt that a query-issuing call could get blocked if the
> postmaster stops responding, but not PQstatus.
>
> regards, tom lane
>
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