Ошибка parent keys not found

Hi I am developing a database in Oracle SQL dev, that is trying to access foriegn keys from another table. I am currently working on the ItemOrdered table which I’ve created with the following CREATE statement

CREATE TABLE ItemOrdered(OrderID varchar2(9) REFERENCES Ords(OrderID),
BeltID varchar2(9) REFERENCES BeltID(BeltID), 
Quantity varchar(4) NOT NULL,
PRIMARY KEY(OrderID, BeltID))

As you can See I have the following foriegn keys Ords and BeltID.

Now when I try to run the following statement

INSERT INTO ItemOrdered VALUES(401565981,234489212,'2')

It gives me the following error

violated — parent key not found
02291. 00000 — «integrity constraint (%s.%s) violated — parent key not found»

I have provided my Ords CREATE statement if its needed

  CREATE TABLE Ords(OrderID varchar2(9) PRIMARY KEY, 
CustomerID varchar(9) REFERENCES Customers(CustomerID), 
    Expected_Delivery_Date date DEFAULT sysdate NOT NULL, 
Actual_Delivery_Date date DEFAULT sysdate NOT NULL, 
    Payment_Due_Date date DEFAULT sysdate NOT NULL, 
Order_Date date DEFAULT sysdate NOT NULL, Price Varchar(10), 
    Order_Placed varchar2(1) CONSTRAINT OrderPlaced 
CHECK(Order_Placed IN('Y','N')) NOT NULL, 
Order_Confirmed varchar2(1)
    CONSTRAINT Order_Confirmed CHECK(Order_Confirmed IN('Y','N')) NOT NULL, 
Order_Completed varchar2(1) CONSTRAINT Order_Completed
    CHECK(Order_Completed IN('Y','N')) NOT NULL)

And I have also provided my BeltID CREATE statement

    CREATE TABLE BeltID(BeltID varchar2(9) PRIMARY KEY, 
BeltLengthID varchar2(9) REFERENCES BeltLength(BeltLengthID), 
    ColourID varchar2(9) REFERENCES Colour(ColourID), 
DesignID varchar2(9) REFERENCES Design(DesignID),ComponentID varchar2(9) REFERENCES Component(ComponentID))

I don’t seem to quite understand why I am getting this error. Is there an clear explanation why?

Here is the http link of what I am trying to do.
link text

ORA-02291: Integrity Constraint-Parent Key Not Found (WWV_FLOW_FND_GU_INT_G_FK) — When Importing A Workspace In APEX — ORDS(with Weblogic) (Doc ID 1992236.1)

Last updated on OCTOBER 25, 2022

Applies to:

Symptoms

Steps to reproduce:

1) In APEX Instance #1 , create a developer account
and assign it to one (or all) of the pre-created user groups: RESTful
Services, SQL Developer, OAuth2 Client Developer.

2) Export this workspace.

3) In APEX Instance #2, log in as instance administrator and open Manage
Workspaces / Import Workspace page.

4) Upload the export file from Step 2 and complete the import wizard — the
following error is displayed:

Execution of the statement was unsuccessful. ORA-02291: integrity constraint
(APEX_040200.WWV_FLOW_FND_GU_INT_G_FK) violated — parent key not found

This error occurs because pre-created user groups (SQL Developer, etc) do not
have the same IDs in two APEX instances.

ORA-02291: integrity constraint (APEX_040200.WWV_FLOW_FND_USER_GRPS_FK) violated — parent key not found when importing a workspace into a newly reinstalled instance

Cause

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Источник

Oracle / PLSQL: ORA-02291 Error Message

Learn the cause and how to resolve the ORA-02291 error message in Oracle.

Description

When you encounter an ORA-02291 error, the following error message will appear:

• ORA-02291: integrity constraint violated — parent key not found

Cause

You tried to reference a table using a unique or primary key, but the columns that you listed did not match the primary key, or a primary key does not exist for this table.

Resolution

The option(s) to resolve this Oracle error are:

Option #1

This error commonly occurs when you have a parent-child relationship established between two tables through a foreign key. You then have tried to insert a value into the child table, but the corresponding value does not exist in the parent table.

To correct this problem, you need to insert the value into the parent table first and then you can insert the corresponding value into the child table.

For example, if you had created the following foreign key (parent-child relationship).

Then you try inserting into the products table as follows:

You would receive the following error message:

Since the supplier_id value of 5000 does not yet exist in the supplier table, you need to first insert a record into the supplier table as follows:

Then you can insert into the products table:

Источник

ORA-02291: Integrity Constraint,parent Key Not Found Error Code: 2291 Call: Insert Into MEDIATOR_RE (Doc ID 2494061.1)

Last updated on OCTOBER 21, 2021

Applies to:

Symptoms

On : 12.2.1.3.0 version, Fabric

While using a composite with mediator, execution after running a purge is throwing the error as below.
ORA-02291: integrity constraint (OPS_SOAINFRA.MEDIATOR_GROUP_STATUS_FK1) violated — parent key not found

ERROR
————————
Got an exception: Exception [EclipseLink-4002] (Eclipse Persistence Services — 2.6.5.v20170607-b3d05bd): org.eclipse.persistence.exceptions.DatabaseException Internal Exception: java.sql.SQLIntegrityConstraintViolationException: ORA-02291: integrity constraint (OPS_SOAINFRA.MEDIATOR_GROUP_STATUS_FK1) violated — parent key not found Error Code: 2291 Call: Insert into MEDIATOR_RESEQUENCER_MESSAGE (ID,OWNER_ID,COMPONENT_DN,OPERATION,LEVEL_DETAIL2,GROUP_ID,SEQUENCE_ID, CREATION_DATE,NEXT_SEQUENCE_ID, SOURCE_URI,STANDARD_SEQUENCE_ID,STATUS,INSTANCE_CREATED,property1,property2,DUMMY1,FLOW_ID,SCA_PARTITION_ID,PARTITION_DATE) values (. systimestamp at time zone ‘UTC’. ) bind = 4

Changes

Cause

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Источник

ORA-02291: integrity constraint violated — parent key not found

Hi all,
I have two tables
A,B

A has primary key referenced as foreign key in B table

When I need to dleete some rows from table A.But when i tried to delete them,Iwas thrown with the error.
ORA-02292: integrity constraint (string.string) violated — child record found

So idisble the constraint from table B.
AFter that i delete the rows from table A and reserted some other rows.
But now when i try to enable the constraint,I am getting this error.
ORA-02291: integrity constraint (string.string) violated — parent key not found.

How to overcome this situation?

Answers

Error: ORA 2291
Text: integrity constraint (%s.%s) violated — parent key not found
——————————————————————————-
Cause: Attempted to insert or update values that do not have corresponding
Parent key values.
Action: obvious.

Explanation:
If you have a FOREIGN KEY constraint on a table you cannot INSERT
or UPDATE rows such that they would not have a matching PARENT
in the MASTER table.
>

Refer to metalink Doc ID: Note:19524.1

Yes you are getting the correct error .

If Oracle allows you to do this that is allow you to insert into the foreign key column without corresponding primary key then What is the purpose of enforcing primary and foreign key or parent child relationship.

In your case you can only insert into the foreign key if you have the corresponding entry in the Primary key.

If at the time of creating foreignn key, you have use «On delete cascade or On delete set null» Then you can simply delete the primary key without doping anything to the foreign key. Corresposnding values for the foreignn key will automatically be deleted or set to null.

When you enable the constraint it check existing data also. so overcome from this situation enable the constraint with novalidate option so it check for future insertion only not check existing data.

Edited by: Vivekdhiman on Oct 21, 2008 12:12 PM

The correct answer is to ensure that you DO have the parent key values — ie in the Parent table.

You would use NOVALIDATE only under exceptional circumstances — eg you are «fixing» data which was erroneous OR that you need to ignore existing rows but want the constraint enabled for future rows to be inserted after this point in time.

I have a table A which has a column x as primary key.
This column x is referenced in column y of table B.
Now as per my understanding,table A is the primary table and table B is the foriengn key table.
On deleteing from table A,i got the error child record found as x is foreign key in table B.
I disabled the foriegn key constraint in table B.
I deleted the rows from table A.
I,then reserted some rows in tbale A.
I committed the transaction.
Now I want to enable the foriegn key constraint in table B.
But I am getting parent key not found.

I have records in parent table ie table A. I am not inserting in table B[foreign key table].
I inserted in table A.
The situation is like this.

table A table B
x y
1 1
2 1
3 2
4 3
5
6
7
8

Now when i enable cforiegn key constraint in table B,I get parent key not found,but all the parent key is present in table A.
I inserted 5,6,7,8 in table A after deleting some records.

Edited by: MYH on Oct 21, 2008 12:33 AM

SQL> create table parent1(id number primary key);

SQL> insert into parent1 values(&i);
Enter value for i: 1
old 1: insert into parent1 values(&i)
new 1: insert into parent1 values(1)

SQL> /
Enter value for i: 2
old 1: insert into parent1 values(&i)
new 1: insert into parent1 values(2)

SQL> /
Enter value for i: 3
old 1: insert into parent1 values(&i)
new 1: insert into parent1 values(3)

SQL> /
Enter value for i: 4
old 1: insert into parent1 values(&i)
new 1: insert into parent1 values(4)

SQL> create table child1(id number CONSTRAINT FK_ID references parent1(id));

SQL> insert into child1 values(&i);
Enter value for i: 1
old 1: insert into child1 values(&i)
new 1: insert into child1 values(1)

SQL> /
Enter value for i: 1
old 1: insert into child1 values(&i)
new 1: insert into child1 values(1)

SQL> /
Enter value for i: 3
old 1: insert into child1 values(&i)
new 1: insert into child1 values(3)

SQL> /
Enter value for i: 2
old 1: insert into child1 values(&i)
new 1: insert into child1 values(2)

SQL> /
Enter value for i: 4
old 1: insert into child1 values(&i)
new 1: insert into child1 values(4)

SQL> select * from parent1;

SQL> delete from parent1 where > delete from parent1 where > *
ERROR at line 1:
ORA-02292: integrity constraint (SCOTT.FK_ID) violated — child record found

SQL> select constraint_name,constraint_type from user_constraints where table_name=’CHILD

SQL> ALTER TABLE CHILD1 DISABLE CONSTRAINT FK_ID;

SQL> delete from parent1 where >
1 row deleted.

SQL> ALTER TABLE CHILD1 ENABLE CONSTRAINT FK_ID;
ALTER TABLE CHILD1 ENABLE CONSTRAINT FK_ID
*
ERROR at line 1:
ORA-02298: cannot validate (SCOTT.FK_ID) — parent keys not found

SQL> INSERT INTO PARENT1 VALUES(1);

SQL> ALTER TABLE CHILD1 ENABLE CONSTRAINT FK_ID;

Источник

ORA-02291: integrity constraint violated — parent key not found

I have a row in parent table. I am using the same sequence from the parent table during insertion. (In fact I am getting the sequence from the drop down during insertion in plsql developer tool). Still I am getting this error.

1) Parent table’s primary key is Child table’s primary key as well as foreign key.
2) Parent table’s primary key is referred as primary key in some other child table as well.
3) But not using Supertype-Subtype relationship. Just direct reference

Can you please tell me why am I getting this error.

Answers

Because the integrity check is made immediately, and the database is temporarily inconsistent.
When you set the foreign key to be deferred it will evaluate at commit, when everything should be ok again.

———
Sybrand Bakker
Senior Oracle DBA

I am assuming you know the fact that by this design, your Parent can have a Single Child. Hence, a change in Business req, to support multiple childs can be a headache for you.>

Can you please let me know why can’t I have more than 1 table. As I mentioned in my 2nd point, I have more than 1 child table for a same parent.

sybrand_b wrote:
Because the integrity check is made immediately, and the database is temporarily inconsistent.
When you set the foreign key to be deferred it will evaluate at commit, when everything should be ok again.

———
Sybrand Bakker
Senior Oracle DBA

Curious to understand this.

In below test case (which I am assuming is on same lines as OP’s):
In this test case, an Integrity was made immediately and reported an error.

Can you please explain if I misunderstood your point?

I am assuming you know the fact that by this design, your Parent can have a Single Child. Hence, a change in Business req, to support multiple childs can be a headache for you.>

Can you please let me know why can’t I have more than 1 table. As I mentioned in my 2nd point, I have more than 1 child table for a same parent.

I never mentioned «can’t I have more than 1 table». I was talking in terms of Records.

Say, your Parent ID 1, can possibly have more than 1 child (speaking in General terms excluding your Requirements), hence if you keep your Foreign Key as Primary Key, your Table would not allow you, would it?
I do understand that you being knowledgeable about your requirements have designed the Tables accordingly, I was just raising a concern I saw.

No Objections to your design.

Источник

Find the row which causing violation of foreign key constraint in Oracle

Find the row which caused a violation of the foreign key when tried to enable the foreign key constraint:

To clean the rows that violate the foreign key constraint, You need to create an EXCEPTIONS table in the current schema. Use this script present in the RDBMS folder of Oracle Home: rdbms/admin/utlexcpt.sql.

Following are the steps to find the row that violate the foreign key constraint:

1. Create an exceptions table.

SQL> @?/rdbms/admin/utlexcpt.sql;

2. Populate the EXCEPTIONS table with the rows that violate the constraint, using the EXCEPTIONS INTO clause.

SQL> alter table table_name modify constraint fk_constraint_name validate exceptions into exceptions;

Note This statement while executing still throws the ORA-02298 error as long as there are rows that violate the constraint. The statement also inserts records into the EXCEPTIONS table for any bad rows.

1. Check the Exception table for rows.
   You use the ROW_ID column of the EXCEPTIONS table to remove any records that violate the constraint. In Example, you find that only one row needs to be removed from the EMP table.

 SQL> SELECT * FROM EXCEPTIONS;
Example:
ROW_ID              OWNER  TABLE_NAME  CONSTRAINT
------------------  -----  ----------  --------------------
AAAFKQAABAAAK8JAAB  SCOTT  EMP         EMP_DEPT_FK

Example of Creating Foreign key and reproducing the error and solution:

--- Created Parent p1 and Child c1 table with foreign key established 

SQL> create table p1(id number primary key, name varchar2(100));
Table created.

SQL> create table c1(cid number primary key, pid number, constraint fk_c2 foreign key (pid) references p1(id));
Table created.

-- insert into parent and child table
SQL> insert into p1 values (1,'a');
1 row created.
SQL> insert into p1 values (2,'b');
1 row created.

SQL> insert into c1 values (2,5);
insert into c2 values (2,5)
*
ERROR at line 1:
ORA-02291: integrity constraint (SYS.FK_C2) violated - parent key not found

-- Disable the foreign key constraint to insert value
SQL> alter table c2 disable constraint FK_C2;
Table altered.

SQL> insert into c2 values (2,5);
1 row created.

--Enable the constraint throw the error 
SQL> alter table c2 enable constraint FK_C2;
alter table c2 enable constraint FK_C2
                                 *
ERROR at line 1:
ORA-02298: cannot validate (SYS.FK_C2) - parent keys not found

--Find the row causing problem to enable the constraint:
SQL> @?/rdbms/admin/utlexcpt.sql;

Table created.

--Run again the command using EXCEPTION table:
SQL> alter table c2 modify constraint FK_C2 validate exceptions into exceptions;
alter table c2 modify constraint FK_C2 validate exceptions into exceptions
                                 *
ERROR at line 1:
ORA-02298: cannot validate (SYS.FK_C2) - parent keys not found

--Check the EXCEPTION table having rowid which causing problem:
SQL> col owner for a10
SQL> col table_name for a10
SQL> col constraint for a20
SQL> select * from exceptions;

ROW_ID             OWNER      TABLE_NAME CONSTRAINT
------------------ ---------- ---------- --------------------
AAATBmAABAAAIGBAAA SYS        C2         FK_C2


-- Check the row in table 
SQL> select * from c2 where rowid in (select row_id from exceptions);

       CID        PID
---------- ----------
         2          5