Is this a feature ?

Hi the list !
I've read the docs, and found that you could concatenate two or more strings
in one select statement like this :
select
civ || name || forname as identity
from
person;

This just works fine and returns rows with only one column named identity.
So far, if one of the fields (civ, name or forname) is null, identity is
null... That doesn't seems right, since it means that 1+2+0 = 0 !!!!
Has anybody else seen the same strange behaviour ? And is there a way to work
this around ?
Please, don't answer me to use the function textcat (text, text), since it
behaves the same and makes queries quite unreadeable...
eg.
select
textcat ( textcat (civ, name), forname) as identity
from person;
is quite readeable, but when you add fields separator, it isn't.
--
David BOURIAUD
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In a world without walls or fences, what use do we have
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ICQ#102562021