ODBC and DECIMAL column width

WinNT 4.0, ODBC 6.40.0007.

I have a table

create table test ( a decimal(9,2), b decimal(9,2) );

Now, if I do

select a-b as c from test;

ODBC driver returns 255 for column width. Same thing for any arithmetic
operation between two decimals. Not really a big bug, but definitely
annoying.

Gene Sokolov.