How to fix the Oracle error ORA-01463: cannot modify column datatype with current constraint(s)?

In this post, you’ll learn more about the Oracle ErrorORA-01463: cannot modify column datatype with current constraint(s) with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01463: cannot modify column datatype with current constraint(s)

Reason for the Error ORA-01463: cannot modify column datatype with current constraint(s)

An attempt was made to modify the datatype of column which has referential constraints; or has check constraints which only allows changing the datatype from CHAR to VARCHAR or vise versa.

How to fix the Error ORA-01463: cannot modify column datatype with current constraint(s) ?

You can fix this error in Oracle by following the below steps

Remove the constraint(s) or do not perform the offending operation.