On Tue, Mar 9, 2010 at 9:30 AM, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> wrote:
> postgres=# select concat('ahaha',10,null,current_date, true);
> concat
> ------------------------
> ahaha,10,,2010-03-09,t
why are there commas in the output?
merlin