How to resolve ORA-01407 Error Message in Oracle database

Learn the motive and how to resolve the ORA-01407 error message in Oracle.

Description

When you encounter an ORA-01407 error, the following error message will appear:

ORA-01407: can’t update (“SCHEMA”.”TABLE_NAME”.”COLUMN_NAME”) to NULL

Cause

You tried to update a column to a NULL fee but the column will no longer take delivery of NULL values.

Resolution

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

Option #1

Correct your UPDATE statement so that you do now not UPDATE a column with a NULL cost when the column is defined as NOT NULL.

For example, if you had a table called suppliers defined as follows:

CREATE TABLE suppliers
( supplier_id number not null,
  supplier_name varchar2(50) not null 
);

And you tried to execute the following UPDATE statement:

UPDATE suppliers
SET supplier_name = null
WHERE supplier_id = 10023;

You would receive the following error message:

You have described the supplier_name column as a NOT NULL field. Yet, you have tried to update the area with a NULL value.

You should correct this error with the following UPDATE statement:

UPDATE suppliers
SET supplier_name = 'IBM'
WHERE supplier_id = 10023;

Now, you are inserting a NOT NULL fee into the supplier_name column.