How to fix the Oracle error PLS-00522: MAP methods must return a scalar type.?

In this post, you’ll learn more about the Oracle ErrorPLS-00522: MAP methods must return a scalar type. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PLS-00522: MAP methods must return a scalar type.

Reason for the Error PLS-00522: MAP methods must return a scalar type.

The MAP member function was written such that it returns something other than a scalar type.

How to fix the Error PLS-00522: MAP methods must return a scalar type. ?

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

Rewrite the MAP function such that it returns a scalar type.