The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/16/sql-createtableas.html
Description:
Since I was recently bitten by the fact that CREATE TABLE AS doesn't set the
PL/pgSQL variable FOUND, it would be nice if that were explicitly noted in
the documentation. Alternatively, if it COULD set the FOUND variable, that
would be great, although I realize the difficulty of that when coupled with
IF NOT EXISTS.