Hi all,
Seems that CHAR_LENGTH function has a bug.
It doesn't work if you try to have the length of columns with nulls.
Example:
insert into c values('foo');
insert into c values(NULL);
insert into c values('');
select b from c;
b
-------
foo
<-- this is a NULL
<-- this is a ''
(3 rows)
select char_length(b) from c;
ERROR: Bad (null) varchar() external representation
-- Why this error?
-- I think it should be:
length
------
3
<-- length of NULL should be "unknown" this is the behavior of
other databases
0
(3 rows)
What do you think about ?
Jose'
