How to fix the Oracle error PLS-00155: Only a function may be a MAP, ORDER or CONSTRUCTOR method.?

In this post, you’ll learn more about the Oracle ErrorPLS-00155: Only a function may be a MAP, ORDER or CONSTRUCTOR method. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PLS-00155: Only a function may be a MAP, ORDER or CONSTRUCTOR method.

Reason for the Error PLS-00155: Only a function may be a MAP, ORDER or CONSTRUCTOR method.

A procedure was declared as a MAP, ORDER or CONSTRUCTOR method. Only functions can be MAP, ORDER or CONSTRUCTOR methods.

How to fix the Error PLS-00155: Only a function may be a MAP, ORDER or CONSTRUCTOR method. ?

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

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