db fall back to users file

A good one for you , when using an rlm_sql module if the sql server is down the module fails to instantiate and FR does not start at all. Is there a way to force instantation of rml_sql no matter the status of the sql server. Specifically I am trying to do redundant { sql fastusers } the idea is to switch to a local file when the db is down. On a second thought can I do ? accounting { redundat { sql detail } }