ORA-42657
Error during data validation: Invalid or unsupported table name 'string'.'string'.
Cause
The "tableNames" configuration option for the INFER_AND_GENERATE_SCHEMA and INFER_SCHEMA functions cannot be used with external table.
Action
Ensure that the external table name is not passed to the "tableNames" configuration option of the INFER_AND_GENERATE_SCHEMA and INFER_SCHEMA functions.