One of the most common (or perhaps even the most common) question people have regarding PostgreSQL, is how to change privileges for all tables. Usually they want something like MySQL's: GRANT ... ON database.* TO ... Which is interesting as it is actually ...

On 22nd of January, Tom Lane committed patch by Stephen Frost, which adds column level privileges: Log Message: ----------- Support column-level privileges, as required by SQL standard.   Stephen Frost, with help from KaiGai Kohei and others