some code v5

#[tokio::main]
async fn main()->Result<()> {
    let m = read_excel("abc.xlsx", 1, "Sheet1").unwrap();
    let ctx = SessionContext::new();
    ctx.register_table("abc", Arc::new(m))?;
    let df = ctx.sql("select * from abc").await?;
    let d = df.collect().await?;
    let dr = d.as_slice().get(0).unwrap().columns();
    let col1 = dr.get(0).unwrap();
    let sch = df.schema();
    let fields = sch.fields();
    let firtfireld = fields.get(0).unwrap();
    println!("{:?}", firtfireld.field().data_type());
    println!("{:?},", col1);

    Ok(())
}