$$$ Non-fatal error (1202): Foreign Key 'FCM_1_CO_OWNER(Owner_Id) reference

Hi All,
We are getting below fatal error while repairing the repository. and we are using MDM SP07 Patch Level 27.
Error Message: $$$ Non-fatal error (1202): Foreign Key u2018FCM_1_CO_OWNER(Owner_Id) referencing A2i_CM_Users (UserId)u2019 is missing.
Can anyone help me how to resolve this issue ?
Thanks & Regards,
Mahesh

Hello,
I guess you have upgraded your system and hence you are getting this error.
I guess some lookup table are missing the reference in this.
But the error says NON-FATAL, please check if you are getting the same error while checking the repository.
My suggestion would be to unmount and mount the reposiory again.
regards,
Abhishek

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Last edited by Kilzool (2011-05-26 16:26:21)

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(totem:1900): GLib-GObject-WARNING **: invalid (NULL) pointer instance
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That's because with this cursor
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SQL> create table parent (id number constraint parent_pk primary key) ;
Table créée.
SQL> create table child (child_id number,
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Assigning a foreign key

i have created a database which is administered by ora1 who created 2 tables called student and instructor then created a new user called dev1 with dba priviliges dev1 created a table called university assigned a primary key to the university_id column and has added new columns to the instructor and student tables owned by ora1 the problem i am having is i am unable to assign foreign keys to the 2 tables owned by ora1 even though dev1 could add the extra university_id columns to the 2 tables the code i am using to add extra columns and assign the foreign keys is as follows:
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on delete cascade;
I keep getting error message saying table or view does not exist

hi u are using the right format
ALTER TABLE <table_name>
ADD <constraint_name> FOREIGN KEY
(<column_name1> ,
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REFERENCES <table_name>
(<column_name1> ,
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REFERENCES university (university_id)the problem may be your table doesnot exist or u are refering the table which is in different schema
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I am unable to create the Foreign key

Hi,
I need to create the Foreign key which reffered to composite primary key.
the following table structure
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DIVISION, PROJECT_NUMBER, COMPETITION_PROJECT_NUMBER, COMPETITIVE_STMT_TYPE, SEQUENCE, CATEGORY, STATEMENT, USER_ID, RECORD_MODIFICATION_DATE
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PROJECT_NUMBER          NUMBER (10)COMPETITION_PROJECT_NUMBER     NUMBER (10)
COMPETITIVE_STMT_TYPE          VARCHAR2 (2)
SEQUENCE     NUMBER (2)
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STATEMENT     LONG
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ALTER TABLE PROD_COMPET_XREF ADD (
CONSTRAINT PROD_COMP_XREF_PK_DPNCPNCT
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When you create a foreign key, it must reference a unique or primary key. The primary or Unique key must consist ONLY of those columns upon which the Primary key is based.
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alter table parent add constraint pk_parent primary key(col1);
alter table parent add constraint uk_parent unique(col1,col2);
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create table child(col1 char, col2 char);
alter table child add constraint fk_child_parent foreign key(col1,col2) references parent(col1,col2);
insert into child values('B','4');
insert into child values('B','4')
ERROR at line 1:
ORA-02291: integrity constraint (WILDGOD.FK_CHILD_PARENT) violated - parent key
not found
thats what i expect....but
insert into child values('B',NULL);
*1 row created.*
why does it let me do this, i realize its because col2 is NULL but shouldnt it still check for col1 to be in the parent?
Please clarify, thanks in advance.

I see the same & am not sure why either.
SQL> @a
SQL> create table parent(col1 char, col2 char);
Table created.
SQL> alter table parent add constraint pk_parent primary key(col1);
Table altered.
SQL> alter table parent add constraint uk_parent unique(col1,col2);
Table altered.
SQL>
SQL> insert into parent values('A','7');
1 row created.
SQL> create table child(col1 char, col2 char);
Table created.
SQL> alter table child add constraint fk_child_parent foreign key(col1,col2) references parent(col1,col2);
Table altered.
SQL>
SQL> insert into child values('B','4');
insert into child values('B','4')
ERROR at line 1:
ORA-02291: integrity constraint (DBADMIN.FK_CHILD_PARENT) violated - parent key not found
SQL>
SQL> insert into child values('B',NULL);
1 row created.
SQL>
SQL> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for Linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production

How to alter or add foreign key constr to table having child rows or data

Hi,
I have a table by name DEPT in which the column DEPTNO is a primary key column and have data in it for all the columns . Now I have a EMP table where in the column DEPTNO is not having any constraint including foreign key constraint too. Now i have data in the EMP table for all the columns . now i would like to add the foreign key constraint to DEPTNO column in the EMP table referencing the DEPTNO column in the DEPT table. Both the table do not have any null values .
I need to add the foreign key without deleting the data in the EMP table.
Please advice.
Regards,
Vinesh

Hi,
I need to add the foreign key without deleting the data in the EMP table.Foreign key constraint can have only those values which are present in the primary key of the parent table or null.
When your tables are populated with values and then you are adding the constraint then,
the parent table data is only present in child table or null values.
Example
SQL> create table emp_bkp as select * from emp;
Table created.
SQL> create table dept_bkp as select * from dept;
Table created.
SQL> alter table dept_bkp
2 add constraint pk_deptno primary key(deptno);
Table altered.
SQL> select distinct deptno from emp_bkp;
    DEPTNO
        30
        20
        40
        10
SQL> select deptno from dept_bkp;
    DEPTNO
        10
        20
        30
        40
        55
SQL> alter table emp_bkp
2   add constraint fk_deptno_bkp foreign key(deptno)
3    references dept_bkp(deptno);
Table altered.
SQL> alter table emp_bkp
2 drop constraint fk_deptno_bkp;
Table altered.
SQL> insert into emp_bkp(empno,ename,deptno) values(142,'Fenny',90);
1 row created.
SQL> alter table emp_bkp
2 add constraint fk_deptno_bkp foreign key(deptno)
3   references dept_bkp(deptno);
add constraint fk_deptno_bkp foreign key(deptno)
ERROR at line 2:
ORA-02298: cannot validate (SCOTT.FK_DEPTNO_BKP) - parent keys not found
SQL> update emp_bkp
2 set deptno=null
3 where empno=142;
1 row updated.
SQL> alter table emp_bkp
2 add constraint fk_deptno_bkp foreign key(deptno)
3   references dept_bkp(deptno);
Table altered.
SQL> insert into dept_bkp (deptno,dname)values(90,'IT');
1 row created.
SQL> update emp_bkp
2 set deptno=90
3 where empno=142;
1 row updated.Twinkle

Does a foreign key have to be a primary key

Hey all.I was checking on the database code written by sambapos.To my surprise, I found a foreign key that is not a primary key anywhere.
Is that possible?
If, so why?
I am really astonished.

Limitations and Restrictions
A foreign key constraint does not have to be linked only to a primary key constraint in another table; it can also be defined to reference the columns of a UNIQUE constraint in another table.
When a value other than NULL is entered into the column of a FOREIGN KEY constraint, the value must exist in the referenced column; otherwise, a foreign key violation error message is returned. To make sure that all values of a composite foreign key constraint
are verified, specify NOT NULL on all the participating columns.
FOREIGN KEY constraints can reference only tables within the same database on the same server. Cross-database referential integrity must be implemented through triggers. For more information, see
CREATE TRIGGER (Transact-SQL).
FOREIGN KEY constraints can reference another column in the same table. This is referred to as a self-reference.
A FOREIGN KEY constraint specified at the column level can list only one reference column. This column must have the same data type as the column on which the constraint is defined.
A FOREIGN KEY constraint specified at the table level must have the same number of reference columns as the number of columns in the constraint column list. The data type of each reference column must also be the same as the corresponding column in the column
list.
The Database Engine does not have a predefined limit on either the number of FOREIGN KEY constraints a table can contain that reference other tables, or the number of FOREIGN KEY constraints that are owned by other tables that reference a specific table.
Nevertheless, the actual number of FOREIGN KEY constraints that can be used is limited by the hardware configuration and by the design of the database and application. We recommend that a table contain no more than 253 FOREIGN KEY constraints, and that it
be referenced by no more than 253 FOREIGN KEY constraints.
FOREIGN KEY constraints are not enforced on temporary tables.
If a foreign key is defined on a CLR user-defined type column, the implementation of the type must support binary ordering. For more information, see
CLR User-Defined Types.
A column of type varchar(max) can participate in a FOREIGN KEY constraint only if the primary key it references is also defined as type
varchar(max).
Read this article
http://msdn.microsoft.com/en-us/library/ms189049.aspx
Regards, Ashwin Menon My Blog - http:\\sqllearnings.com

$$$ Non-fatal error (1202): Foreign Key 'FCM_1_CO_OWNER(Owner_Id) reference

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