There are misprints in postgres doc., in :
Chapter 10. PL/pgSQL - SQL Procedural Language (c40914117.htm)
Statements
...
(resulting in a PL/pgSQL internal SELECT).
But there are cases where someone isn't interested int
-----------------------------------------(have to be)-->
But there are cases where someone isn't interested in
the functions result.
RAISE level format''
--(have to be)-->
RAISE level 'format'