[Feature]: supports sql output printing in PL run scenario for MySQL mode

[yhilmare]

Is your feature request related to a problem?

I created a procedure like this:

create procedure `log_proc` (IN `str` varchar(255)) BEGIN
    DECLARE log_message VARCHAR(255);
    
    SET log_message = CONCAT('current time is ', NOW(), '.');
    SELECT log_message;
END;

and I run it by ODC's procedure window:

as you can see, it prints nothing. It can print what I want when I call it by obclient or sql window:

Describe the solution you'd like

print sql's output at PL window

Additional context

No response