Question

How to resolve ora-02291 integrity constraint?

Answer 1

To resolve the ORA-02291 error, identify the parent table and confirm that the foreign key value exists. Insert the necessary value into the parent table before inserting into the child table. Ensure application logic correctly handles the insertion order and foreign key values.

Step-by-step explanation:

To resolve the ORA-02291 integrity constraint error, you need to understand that this error occurs when an attempt is made to insert a child row with a foreign key value that does not exist in the corresponding parent table. This means you're trying to insert a value into a child table that does not have a corresponding value in the parent table.

Here are the steps to troubleshoot and resolve the ORA-02291 error:

1. Identify the parent table and the foreign key constraint. Look at the error message to determine which constraint is being violated.
2. Check the parent table to confirm that the foreign key value exists. If the value does not exist, you need to insert the proper value into the parent table before attempting to insert into the child table.
3. Ensure that any insert into the child table includes a value that corresponds to a value in the parent table. This may involve changing the value being inserted or adding the necessary parent row.
4. After making the necessary changes, reattempt the insert into the child table.

If you repeatedly encounter this error, you may need to review the logic in your application that prepares data for insertion to ensure that the foreign key values are correct and that parent rows are inserted before child rows.