Freeradius, custom vars and sql queries in sites-enabled/dhcp

Hello I'm using freeradius 2.1.9 Trying to setup dhcp server. There is no problem with dhcp + rlm_perl. But i want to speed up the server - do all the things with dhcp+rlm_sql. But i'm complicated doing this. For example, i need to parse several conditions, regarding to sql queries results. I'm confusing in how to use custom vars and custom sql queries in sites-enabled/dhcp ? i.e. i need somthing like this pseudocode: dhcp DHCP-Discover { ......... sql MYVAR := "%{sql: select blahblahblah}" ......... if(myvar >= xxx) { MYVAR2 := "%{sql:select blah blah2 blah3}" } } My question is how to do all this correct? =) Thx for help -- BRGS, Ilya A. Masandilov IP-Home.Net