I love the simplicity of this approach. Unfortunately it gives the
same error message. I guess I'll just have to IFDEF my source code.
Thanks,
Sarah
msarahm@ekno.com
Andrew Sullivan wrote:
On Wed, Jun 26, 2002 at 05:50:44PM +0000, s wrote:
> I am trying to keep my select statements compatible for
running on
> oracle or postgres. I ran into a problem with a query that is
part of
> a union. The original query clause is of the form:
>
> select distinct f.id, '' from foo f;
>
> I need the empty string as the second attribute because the
first part
Oracle does, IIRC, some strange things with empty strings, handling
'' as NULL, no? I think this is an Oracle gotcha, if I'm right,
because '' is not NULL, in fact. (Consider the difference between
knowing that I do not have a middle name, and not knowing what my
middle name is.)
So I wonder if this will work:
select disinct f.id, ' ' from foo f;
The ' ' should get automatically cast to TEXT, and you should be all
right.
A
--
----
Andrew Sullivan 87 Mowat Avenue
Liberty RMS Toronto, Ontario Canada
<andrew@libertyrms.info> M6K 3E3
+1 416 646 3304 x110
____________________________________________________________________________
Lonely Planet's ekno - more than a phonecard
Get ekno before you go!
http://www.ekno.lonelyplanet.com
