[Devel] avpops: new function avp_db_query()

[Daniel-Constantin Mierla]

Hello,

avpops module has a new function which allow to execute raw SQL queries 
and store the result in AVPs.

avp_db_query(query, dest);

The query given as parameter can contain pseudo-variables. Using this 
function you can benefit of full database system features, being able to 
do joins, unions, etc. Old db-related functions are in place since they 
are faster for their usage case.

The documentation of the of avpops module was updated and posted at:

http://openser.org/docs/modules/1.1.x/avpops.html

A small example of usage: limit the number of calls done in the last day:

if(is_method("INVITE") && !has_totag())
{
     if(avp_db_query("select count(*) from acc where username='$fU' and 
domain='$fd' and method='INVITE' and timestamp>=$Ts-24*3600", 
"$avp(i:234)"))
    {
       if(avp_chech("$avp(i:234)", "ge/i:10"))
      {
          sl_send_reply("403", "too many calls in the last day");
          exit();
     }
   }
}

Cheers,
Daniel