Error in updating not null column

Question

hi,
I am getting the following error when i run the below query,
SQL> SQL> SQL> SET (a.rate_center_nm,a.rate_center_state_cd,a.load_status_cd) =
ERROR at line 2:
ORA-01407: cannot update
("MKDM"."MASTER_ADRS_RATE_CENTER_XREF"."LOAD_STATUS_CD") to NULL
Query
UPDATE /*+ PARALLEL(a,6) */ master_adrs_rate_center_xref a
SET (a.rate_center_nm,a.rate_center_state_cd,a.load_status_cd) =
SELECT /*+ PARALLEL(b,6) */
b.rate_center_nm
,b.rate_center_state_cd
,'4'
FROM
xref_temp b
WHERE
a.mast_pri_address_id = b.mast_pri_address_id
WHERE EXISTS
SELECT 1
FROM
master_adrs_rate_center_xref b
,xref_temp c
WHERE b.mast_pri_address_id = c.mast_pri_address_id
Can anyone help me in identifying the error?
Beneven

Answer 1

I would change your WHERE EXISTS clause to look exactly like your subquery (except for the column list of course):
UPDATE master_adrs_rate_center_xref a
SET   (a.rate_center_nm
      ,a.rate_center_state_cd
      ,a.load_status_cd) =
             (SELECT b.rate_center_nm
                    ,b.rate_center_state_cd
                    ,'4'
              FROM   xref_temp b
              WHERE  a.mast_pri_address_id = b.mast_pri_address_id
WHERE EXISTS (SELECT 1
              FROM   xref_temp b
              WHERE  a.mast_pri_address_id = b.mast_pri_address_id
;