Re: LOCK TABLE HELP

luca.ciciriello@email.it wrote:
> Sorry for the bad text format. Below the right (I hope...)  text:
> Hi All.I'm using for the first time the postgres lock utilities, but

Nope, sorry. Still full of HTML stuff. Hang on, I'll see if I can fix it.

Luca's message below:
=====================


I'm using for the first time the postgres lock utilities, but brobably
I'm doing something of not legal.

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());

        ........................................
        ........................................


pObj->ReturnNotification(static_cast<string>(notify->relname),connection);

          .........................................
          .........................................

           CleanUpBeforeStop(void *pParam);
}

void CleanUpBeforeStop(void *pParam)
{
           .........................................
           .........................................
           res = PQexec(pPti->conn, "COMMIT WORK;");
}

Well, the function Execute is the detached procedure of a thread. In
here I execute the LOCK command on the table "actorTable". Then, in the
method ReturnNotification I read the locked table. At last, calling the
function CleanUpBeforeStop, I execute the COMMIT command.

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?

Any Idea?

Thanks in advance.

Luca

--
   Richard Huxton
   Archonet Ltd