How to fix the Oracle error PLS-00498: illegal use of a type before its declaration?

In this post, you’ll learn more about the Oracle ErrorPLS-00498: illegal use of a type before its declaration with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PLS-00498: illegal use of a type before its declaration

Reason for the Error PLS-00498: illegal use of a type before its declaration

A variable or constant was declared to be of a type whose declaration appears later in the compilation unit; or, a type or subtype was declared in terms of another type whose declaration appears later in the compilation unit.

How to fix the Error PLS-00498: illegal use of a type before its declaration ?

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

Ensure that the type declaration preceeds its use in the variable/ constant/type declaration.