ORA-42644
Error during data validation: Table names not specified.
Cause
tableNames option for DBMS_JSON_DUALITY.INFER_AND_GENERATE_SCHEMA or DBMS_JSON_DUALITY.INFER_SCHEMA is NULL or empty.
Action
Ensure that the table names are passed to the INFER_AND_GENERATE_SCHEMA and INFER_SCHEMA functions.