[GENERAL] using = in a function

[Andy Colson]

Hi all,

I was reading the doc's on functions when I came across this:
"
An assignment of a value to a PL/pgSQL variable or row/record field is 
written as:

variable := expression;
"

and I realized, I didn't do that!  My assignments look like:

tmp = extract(minute from result);
if tmp > 30 then
        tmp = 60 - tmp;
        offset = tmp || ' minutes';
        result = result + offset;
else
        offset = tmp || ' minutes';
        result = result - offset;
end if;


Notice I just use = and not :=.

My question is, is there a difference?  It seems to work both ways, so 
I'm a little confused.

Thanks,

-Andy

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