I have a partial mapping of some of the fields with their internal type, e.g.:
integer	4
smallint	5
bigint	8
date		9
varchar	12
boolean	16
text		25
What internal table has the complete mapping?  I looked around on the Postgres 
site and thought it might be in pg_attribute, pg_attrdef, or pg_type, but 
it's not -- or else I'm not performing the right query.
Thanks.
-doug
ps - These values are "set in stone" and don't change with updates, correct?