presto-main/src/main/java/io/prestosql/operator/TableDeleteOperator.java/TableDeleteOperatorFactory/createOperator
class TableDeleteOperatorFactory:        @Override
        public Operator createOperator(DriverContext driverContext)
        {
            checkState(!closed, "Factory is already closed");
            OperatorContext context = driverContext.addOperatorContext(operatorId, planNodeId, TableDeleteOperator.class.getSimpleName());
            return new TableDeleteOperator(context, metadata, session, tableHandle);
        }