Re: LOCK TABLE HELP

[luca.ciciriello@xxxxxxxx]

Sorry for delay in my answer.

The problem is that with the lock instructions my app remain in a freeze state. It resembling a MUTEX deadlock.

Anyway, as soon as possible I'll test yuor idea to use a separate PQexec.

Thanks.

Luca. 

--------- Original Message --------
Da: "Alvaro Herrera" <alvherre@xxxxxxxxxxxxxxxxx>
To: "Richard Huxton" <dev@xxxxxxxxxxxx>
Cc: pgsql-general@xxxxxxxxxxxxxx
Oggetto: Re: LOCK TABLE HELP
Data: 14/03/08 17:51




> luca.ciciriello@xxxxxxxx wrote:

> My action are:
>
> void *Execute(void *pParam)
> {
> ........................................
> ........................................
>
> & nbsp; string tableLock = "BEGIN WORK;";
> tableLock.append(" LOCK TABLE ");
> tableLock.append(actorTable);
> tableLock.append(" IN ACCESS EXCLUSIVE MODE;");
> res = PQexec(connection, tableLock.c_str());


> Well, all this doesn't work (the connection is th e always the same in
> all methods and functions). Have I to Lock the table, perform some
> operation on this table, and unlock the table all in the same function
> scope?

What do you mean it doesn't work? How exactly it fails?

If anything, I'd suggest to send the LOCK TABLE in a separate PQexec()
call from BEGIN WORK.

--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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