select
        identity_public_id,
        data,
        i.created_at
from secd.identity       i
join secd.identity_email ie using (identity_id)
join secd.email          e  using (email_id)
where (($1 is null) or (i.identity_public_id = $1))
and   (($2 is null) or (e.address = $2))