# CURRENT DECFLOAT ROUNDING MODE special register

The CURRENT DECFLOAT ROUNDING MODE special register specifies the rounding mode that is used for DECFLOAT values.

The data type is VARCHAR(128). The following rounding
modes are supported:

- ROUND_CEILING rounds the value toward positive infinity. If all of the discarded digits are zero or if the sign is negative, the result is unchanged (except for the removal of the discarded digits). Otherwise, the result coefficient is incremented by 1.
- ROUND_DOWN rounds the value toward 0 (truncation). The discarded digits are ignored.
- ROUND_FLOOR rounds the value toward negative infinity. If all of the discarded digits are zero or if the sign is positive, the result is unchanged (except for the removal of the discarded digits). Otherwise, the sign is negative and the result coefficient is incremented by 1.
- ROUND_HALF_EVEN rounds the value to the nearest value. If the values are equidistant, rounds the value so that the final digit is even. If the discarded digits represent more than half of the value of a number in the next left position, the result coefficient is incremented by 1. If they represent less than half, the result coefficient is not adjusted (that is, the discarded digits are ignored). Otherwise, the result coefficient is unaltered if its rightmost digit is even, or incremented by 1 if its rightmost digit is odd (to make an even digit).
- ROUND_HALF_UP rounds the value to the nearest value. If the values are equidistant, rounds the value up. If the discarded digits represent half or more than half of the value of a number in the next left position, the result coefficient is incremented by 1. Otherwise, the discarded digits are ignored.