Zoltan Boszormenyi wrote:
Chris írta:
CaT wrote:
On Thu, Feb 22, 2007 at 01:08:04PM +1100, Chris wrote:
In postgres, to stop an empty blank string:
create table a(a text not null check (char_length(a) > 0));
What's wrrong with using
a <> ''
sd the check? Or is this just a flavour thing?
Nothing, I just thought of the other way first :)
Probably better doing it as a <> '' otherwise postgres might have to
run the char_length function every time you do an insert (ie might be
a very slight performance issue).
I would do a CHECK (trim(a) <> '')
If you were ok with a string consisting soley of whitespace.
