[GENERAL] index on an int8 column

[Sarah Officer]

I have a table with a column of type int8.  When I try to create an
index on it, the
database protests and gives the following error message:

    ERROR:  Can't find a default operator class for type 20.

Is there an easy fix for this?  I assumed builtin numeric types would
have
default comparison functions.

Also, if I am not posting to the appropriate mailing list, please let me
know.

Thanks in advance,

Sarah Officer
[EMAIL PROTECTED]