You can create a new type based on int2 called uint2.
he input function should subtract 32768 and the output function should
add 32768. The result should be an int4 so that a number such as 40000
can be displayed. The storage space required would still only be an
int2. The actual value stored in the database will be between -32768
to +32767 but the values that will be visible will be 0 to 65535
It seems simple enough to create a type to do that, though I haven't
tried.
Sim
>>You can use a signed type with a CHECK constraint to restrict the
>>column's value to positive integers.
>The sign doesn't concern me. I am storing a value that is unsigned
>and 16 bits wide natively. I'll have to just use an int4 and waste
>twice the space I actually need.