I noticed that the regression test results don't include the following case:<br /><br />select string_agg(a) from
(values(null),(null))g(a);<br /><br /> There is one similar where a delimiter is provided.<br /><br /> Which leads me
toask for clarification, would it be safe to assume that string_agg can never itself return null?<br /><br /> Thom<br
/><br/>
