ORA-06594
Information only: ICD is unable to compute a result, falling back to retrieval by SQL
Cause
An internal value was required that could be retrieved by a fast call to an internal procedure or a slower retrieval using a SQL statement. The internal call failed, and the value was retrieved using a SQL statement.
Action
No action is needed as the situation is handled internally. If the issue persists, then check any errors following this message, and contact Oracle Support.