We use NULLIF() for adding [1|0|null] according to the
evalution of nullif('x','') into boolean columns.
Where x is [1|0|null], which if it's an empty string
(x='') then we add NULL cause NULLIF says if '' == ''
then return NULL into boolean.
An example wrapper function for this with an integer
cast:
CREATE FUNCTION nullif_always_int(text) RETURNS
integer AS '
SELECT nullif($1,'''')::int;
' LANGUAGE SQL;
I was hoping I could do something simliar with
booleans if possible?
____________________________________________________
Start your day with Yahoo! - make it your home page
http://www.yahoo.com/r/hs
