Lex de Haan said,on my timestamp:29/05/2004 5:29 PM:
the IS NULL operator is two-valued, so it would never show the "desired" behavior for this experiment... 'string' IS NULL always evaluates to FALSE, and '' IS NULL evaluates to TRUE (which is quite unfortunate, but that's another discussion)
But the thing that bugs me is: isn't the Oracle (and presumably others db) solution of "IS NULL" a good solution?
I mean: avoid the TRUE/FALSE/NULL logic problem without re-defining the entire IF?
Is there something wrong with: IF (<var> is NOT NULL) then IF(<var> = 'something') then do_this ELSE do_that END IF; ELSE do_nothing; END IF; other than the obvious verbosity/style of writing?
(says he who had to code something like this ad-infinitum in a project 3 years ago...) -- Cheers Nuno Souto in sunny Sydney, Australia dbvision@xxxxxxxxxxxxxxx ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------
