[HACKERS] proposal: PLpgSQL parallel assignemnt

Some modern or old languages (GO, Lua, CLU) has similarly designed function OUT parameters like PLpgSQL.

In these languages is usually supported parallel assignment. It is not supported by PLpgSQL - there is workaround - using SELECT FROM, but it is workaround. The implementation of PA is trivial.

Current state:

==========

CREATE OR REPLACE FUNCTION fx(OUT a int, OUT b int)

AS $$ ...

possibilities of CALL and assignment 

recvar := fx();

rowvar := fx();

SELECT * FROM fx() INTO a, b;

Lua, Golang like proposal:

a, b := fx();

Comments, notes, ideas?

Regards

Pavel