I've changed "timestamp" to "timestamptz" and have begun fixing some code that used to be legal but as of PG 7.3 is not. You can no longer subtract an integer from a timestamp but must cast to date, "timestamp" disappeared (must use "interval" now), "datetime" disappeared ("timestamptz"), and suchwhat.
Renamed a column named "timestamp" in the security package because this is now a reserved word in PG (correctly). I changed the Oracle version, too, because I know that 9i has added the "timestamp" datatype and even if it will accept it as a column name it's confusing.
I also changes postgresql.sql to load correctly under PG 7.1 and 7.2.