Oracle vs SQL - Portfolio ID Column Format

We have an integration that creates a deep-link from our product to the AM UI using the Portfolio ID. In our testing on a SQL backend the link works works perfectly, however we are getting an error converting the customer's Portfolio Ids to integers, The customer is using an Oracle DB appears to have alphanumeric Portfolio Ids. 

Is this an issue with their data or is it expected that the Oracle DB could have alphanumeric Portfolio Ids?