I'd like to create a function :
returning true if the length of the text arg is greater than 0 ;
false otherwise ;
and also returning false when arg is NULL, then i wrote :
CREATE FUNCTION has_infos(text) RETURNS boolean AS 'select character_length($1) > 0;' LANGUAGE SQL IMMUTABLE RETURNS FALSE ON NULL INPUT;
where i get the error :
ERROR: syntax error at or near "FALSE"
LINE 1: ...r_length($1) > 0;' LANGUAGE SQL IMMUTABLE RETURNS FALSE ON N...
with "RETURNS NULL on NULL INPUT", that's OK.
--
Yvon