Range check error

[dhongu]

I have a very strange problem with the following SQL

SELECT @a as a, @b as b, @c as c, @d as d, @e as e;

If all valiables is null then is generated error: "Range check error".


But following SQL work fine.

SELECT @a as a, @b as b, @c as c, @d as d.



Delphi 7, Mysql 5.0.45