datafusion cannot recognize chinese charactors.

[CheersGrant]

Describe the bug
datafusion cannot recognize chinese charactors.

To Reproduce

1. simply create a csv file, put the title as name in chinese charactor: 扫描人
2. run the rust code as below,will get the parse error: Error: SQL(ParserError("Expected an expression:, found: 扫"))

`use datafusion::prelude::*;

#[tokio::main]
async fn main() -> datafusion::error::Result<()> {
// register the table
let ctx = SessionContext::new();
ctx.register_csv("example", "lite.csv", CsvReadOptions::new()).await?;

// create a plan to run a SQL query
let df = ctx.sql("SELECT distinct 扫描人 FROM example").await?;

// execute and print results
df.show().await?;
Ok(())
}`

Expected behavior
make datafusion recognize the chinese charactors.

Additional context

[francis-du]

You can try this:

let df = ctx.sql("SELECT distinct \"扫描人\" FROM example").await?;

or

let df = ctx.sql("SELECT distinct ‘扫描人’ FROM example").await?;

[CheersGrant]

Thanks.