Re: Sub-query as function argument

Michael Burke <michael@engtech.ca> writes:
> Is it possible to execute a SELECT query as an argument to a function?

> SELECT my_func('Sample', NULL, SELECT MIN(year) FROM audio);

You need parentheses around the sub-SELECT.
 SELECT my_func('Sample', NULL, (SELECT MIN(year) FROM audio));

This is generally true everywhere in expressions, not just in
function arguments.  Without the parens, it's often ambiguous
what's subselect and what's outer query.
        regards, tom lane