[Dovecot] Dict SQL lookups without username_field

Dear all,

Is it possible to perform dict lookups with a SQL backend, without specifying the username_field in the SQL query?

I am using the dict to retrieve a Sieve script. My dict configuration looks like this:

map { pattern = priv/sieve/data/$id table = sieve_scripts username_field = email value_field = data fields { id = $id } }

I don't want to specify the username though, as the sieve scripts are valid for all users. However, when I remove "username_field" I get the error "data with id 1' for script main script' not found at path priv/sieve/data/1"

Thanks,

Andy