Either use '' as some_type, or use COALESCE(some_type, ''). On Mon, Jun 27, 2011 at 9:53 AM, Asfand Qazi (Sanger Institute) < aq2.san...@gmail.com> wrote:
> Hello, > > So I have am playing with a view to test the feasibility of a > technique for storing some data. > > It basically goes something like this: > > CREATE VIEW formatted_table AS > SELECT name, > replace(some_template, '@', some_type) AS some_field > FROM some_table; > > some_template is something like 'foo@bar' or 'foobar' (note the > missing template character). > > some_type is a single letter like 'a' or 'b', or it can be NULL. > > The above view works fine for rows where some_type is a letter, and > some_field ends up as 'fooabar' or whatever. > > However, when some_type is NULL, some_field ends up as NULL as well. > I understand that this is expected behaviour, but how do I cause the > view to treat a some_type of NULL as an empty string, so that > some_field simply ends up as 'foobar'? > > Hope that was clear. > > -- > Sent via pgsql-general mailing list (pgsql-general@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general > -- Rick Genter rick.gen...@gmail.com
