How to create function that returns nothing

问题

I want to write a function with pl/pgsql. I'm using PostgresEnterprise Manager v3 and using shell to make a function, but in the shell I must define return type. If I don't define the return type, I'm not able to create a function.

How can create a function without return result, i.e a Function that creates a new table?

回答1:

Use RETURNS void like below:

CREATE FUNCTION stamp_user(id int, comment text) RETURNS void AS $$
    #variable_conflict use_variable
    DECLARE
        curtime timestamp := now();
    BEGIN
        UPDATE users SET last_modified = curtime, comment = comment
          WHERE users.id = id;
    END;
$$ LANGUAGE plpgsql;

回答2:

Functions must always return something, although you can use procedures like

do $$

and start with normal function like

declare
...

but if you still want to do a function just add void after returns.

来源：https://stackoverflow.com/questions/14216716/how-to-create-function-that-returns-nothing