ORA-02298 : cannot validate - parent keys not

Question

Hi,
I am trying to create a FK-PK constraints.
In the alter table command i am using the caluse:
exceptions INTO ... in order to catch all the exception rows .
Can you please explain why i am getting this error message ?
I am using the following command:
SQL> ALTER TABLE STARQ.CALL_FACT ADD (
2 CONSTRAINT CALL_FACT_FK_cmcustdim1
3 FOREIGN KEY (CUST_ID)
4 REFERENCES STARQ.CM_CUST_DIM_1 (DWH_CUST_ID)
5 exceptions INTO starq.exceptions );
CONSTRAINT CALL_FACT_FK_cmcustdim1
ERROR at line 2:
ORA-02298: cannot validate (STARQ.CALL_FACT_FK_CMCUSTDIM1) - parent keys not found

Answer 1

Hi,
>>Can you please explain why i am getting this error message ?
This is a normal behavior. After issued the "alter table add constraint ..." command, you need to query on EXCEPTIONS table.
LEGATTI@XE> create table a (id number constraint pk_a primary key);
Table created.
LEGATTI@XE> create table b (id number);
Table created.
LEGATTI@XE> insert into b values (1);
1 row created.
LEGATTI@XE> create table exceptions(row_id rowid,
  2                     owner varchar2(30),
  3                     table_name varchar2(30),
  4                     constraint varchar2(30));
Table created.
LEGATTI@XE> alter table b add constraint fk_b_a foreign key (id) references a exceptions into exceptions;
alter table b add constraint fk_b_a foreign key (id) references a exceptions into exceptions
ERROR at line 1:
ORA-02298: cannot validate (LEGATTI.FK_B_A) - parent keys not found
LEGATTI@XE> select * from exceptions;
ROW_ID             OWNER                          TABLE_NAME                     CONSTRAINT
AAAD3mAAEAAAABoAAA LEGATTI                        B                              FK_B_ACheers
Legatti