Out of curiosity, is there a particular reason why ob-sql messages the
whole command, aside from debugging/development purposes? funnykitty on
#emacs said that executing a long command set was rather slow because of
the message. I've attached a tiny patch to remove the (message ...) in
case it's left over from debugging, and I've suggested that funnykitty
either use cl-flet to override message or redefine org-babel-execute:sql
in the meantime.