How to fix the Oracle error PLS-00669: Type of expression should be a valid collection variable?

In this post, you’ll learn more about the Oracle ErrorPLS-00669: Type of expression should be a valid collection variable with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PLS-00669: Type of expression should be a valid collection variable

Reason for the Error PLS-00669: Type of expression should be a valid collection variable

An attempt was made to specify expression after INDICES OF or VALUES OF clause that is not a collection variable.

How to fix the Error PLS-00669: Type of expression should be a valid collection variable ?

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

Change the index collection expression type to a valid collection variable.