Chapter 43.8. "Transaction Management" fails to state two critical restrictions

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Page: https://www.postgresql.org/docs/11/plpgsql-transactions.html
Description:

This chapter fails to state:

(1) If a PL/pgSQL procedure issues "commit" then it must be called with
AUTOCOMMIT set to On. This is counter-intuitive. You'd expect the
opposite.

(2) If a PL/pgSQL procedure has a block statement with an exception section
(this might be the procedure's defining block, or an inner block) then that
block's executabe section must not issue "commit". Doing so causes a
run-time error.