Post Accounting

Hi freeradius community! I want to do something with freeradius but i haven't find any information how to do that. The problem is I want to run SQL query after accounting stop request with in sql module. I found that sql module have postauth_query feature. So i want same functionality but after accounting stop request.. Is there any way to do it? (Note that i don't want to use SQL trigger) Thanks for your responses devrim