syntax highlighting in emacs after \e in psql

Hi All,

I'm sure somebody has already solved this problem on Unix.

When I open *.sql files in my emacs it highlights the SQL and Postgres
syntax correctly. But does anybody know how to make it behave like
that also after invoking \e command in psql (so that I don't need to
say: M-x sql-mode each time). My .profile contains: PSQL_EDITOR=emacs;
export PSQL_EDITOR.

Thanks!
MikeW