List of casts in PostgreSQL

Learned something new today that will come in very handy next time I'm about to pick up a manual or search the PostgreSQL documentation with Google.

In psql if you run \dC you get a list of casts. Here's the header:

                           List of casts
   Source type    |    Target type    |   Function    | Implicit? 
------------------+-------------------+---------------+-------------

This is very handy when you need to know, for example, which cast to use when to cast a value of type date to timestamp without time zone you use timestamp. Most of these are pretty obvious and the PostgreSQL book is never far away on my desk, but the interesting thing is that I came across this function by accident when running psql.

(was this the most boring thing I've written here in a long time?)