No, its one update sql statement that updates 864 columns to NULL for 1 row, e.g.

UPDATE LIMARES.ALLOCATION_HOLD_MAP
SET
T_1_0000 =NULL,
T_1_0005 =NULL,
T_1_0010 =NULL, etc etc.(864 columns later.....)
WHERE RES_ID= :B1
commit;
This is why I am asking the question, I thought it would just have 1 entry in the redo log as it is 1 transation.
Rgds. Sheryl