Oracle : Ошибка ORA-28558

"HS_FDS_CONNECT_STRING undefined for non-Oracle system"
*Cause: 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.
*Action: Contact your DBA to verify correct setup of an
HS_FDS_CONNECT_STRING entry in the ORACLE Heterogeneous Services
data dictionary.

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