Postgres does support this.

I have used it, using the `->db->driver()->raw()` on many occasions and it works fine.

Also I have tested this code against our postgres database and it works fine.

http://www.postgresql.org/docs/8.2/static/sql-insert.html
http://www.postgresql.org/message-id/20060802015948.55E539FB208@postgresql.org

It has been supported since version 8.2
http://en.wikipedia.org/wiki/Insert_(SQL)