How to fix the Oracle error ORA-28558: HS_FDS_CONNECT_STRING undefined for non-Oracle system?

In this post, you’ll learn more about the Oracle ErrorORA-28558: HS_FDS_CONNECT_STRING undefined for non-Oracle system with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-28558: HS_FDS_CONNECT_STRING undefined for non-Oracle system

Reason for the Error ORA-28558: HS_FDS_CONNECT_STRING undefined for non-Oracle system

A database link to a non-Oracle system had no HS_FDS_CONNECT_STRING initialization parameter in the ORACLE server’s data dictionary for Heterogeneous Services. Without this parameter, the connection could not be completed.

How to fix the Error ORA-28558: HS_FDS_CONNECT_STRING undefined for non-Oracle system ?

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

Contact your DBA to verify correct setup of an HS_FDS_CONNECT_STRING entry in the ORACLE Heterogeneous Services data dictionary.