When the number of column values is greater than 256, but is fewer than or equal to 65536, the same lookup table grows. Each FP entry (lookup key) contains the index into the lookup table but occupies 2 bytes instead of 1.
To avoid the overhead of converting 1-byte entries into 2-byte entries, users can specify the IQ UNIQUE value to be greater than 256 and less than or equal to 65536 at table creation time.
