[Exim] equivilent of lsearch* on mysql/pgsql lookups?

Currently I have a director that looks like this:
virtual_alias:
driver = aliasfile
domains = lsearch;/mail/conf/domains
file = /mail/conf/$domain/aliases
file_transport = address_file
search_type = lsearch*
qualify_preserve_domain

Using it to get different alias files per domain. I am starting
to get tired of dealing with plain text files and would like to
stuff everything in a database. Have had good luck replacing passwd
file queries with sql queries, but seems like I might get stuck on
the alias files.

-- 
    -Jason J. Horton <jason@???>
     Fat Man in a Little Coat
     Intercom Online Inc. 
     212.376.7440 | http://www.intercom.com