guojidan commented on issue #15756:
URL: https://github.com/apache/datafusion/issues/15756#issuecomment-2817457411
```
use std::sync::Arc;
use bytes::Bytes;
use datafusion::prelude::{CsvReadOptions, SessionContext};
use object_store::{memory::InMemory, path::Path, ObjectStore};
use url::Url;
#[tokio::main]
async fn main() {
let ctx = SessionContext::new();
let bucket_name = "nyc-tlc";
let store: Arc<dyn ObjectStore> = Arc::new(InMemory::new());
let data = r#""year"╦"gender"╦"ethnicity"╦"firstname"╦"count"╦"rank"
"2011"╦"FEMALE"╦"ASIAN AND PACIFIC ISLANDER"╦"SOPHIA"╦"119"╦"1"
"2011"╦"FEMALE"╦"ASIAN AND PACIFIC ISLANDER"╦"CHLOE"╦"106"╦"2"
"2011"╦"FEMALE"╦"ASIAN AND PACIFIC ISLANDER"╦"EMILY"╦"93"╦"3"
"2011"╦"FEMALE"╦"ASIAN AND PACIFIC ISLANDER"╦"OLIVIA"╦"89"╦"4"
"2011"╦"FEMALE"╦"ASIAN AND PACIFIC ISLANDER"╦"EMMA"╦"75"╦"5"
"2011"╦"FEMALE"╦"ASIAN AND PACIFIC ISLANDER"╦"ISABELLA"╦"67"╦"6"
"2011"╦"FEMALE"╦"ASIAN AND PACIFIC ISLANDER"╦"TIFFANY"╦"54"╦"7"
"2011"╦"FEMALE"╦"ASIAN AND PACIFIC ISLANDER"╦"ASHLEY"╦"52"╦"8"
"2011"╦"FEMALE"╦"ASIAN AND PACIFIC ISLANDER"╦"FIONA"╦"48"╦"9"
"2011"╦"FEMALE"╦"ASIAN AND PACIFIC ISLANDER"╦"ANGELA"╦"47"╦"10""#;
let data_bytes = Bytes::from(data);
let path = Path::from("test.csv");
store.put(&path, data_bytes.into()).await.unwrap();
let path = format!("s3://{bucket_name}");
let s3_url = Url::parse(&path).unwrap();
ctx.register_object_store(&s3_url, Arc::new(store));
let path = format!("s3://{bucket_name}/test.csv");
let opts = CsvReadOptions {
delimiter: "╦".as_bytes().first().copied().unwrap_or_default(),
..Default::default()
};
ctx.register_csv("trips", &path, opts)
.await.unwrap();
let df = ctx.sql("SELECT * FROM trips LIMIT 10").await.unwrap();
// print the results
df.show().await.unwrap();
}
```
got error:
```
thread 'main' panicked at
datafusion-examples/examples/external_dependency/test_utf8.rs:40:16:
called `Result::unwrap()` on an `Err` value: Context("Error when processing
CSV file test.csv", ArrowError(CsvError("Encountered UTF-8 error while reading
CSV file: invalid utf-8: invalid UTF-8 in field 1 near byte index 0 at line
1"), None))
stack backtrace:
0: rust_begin_unwind
at
/rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/std/src/panicking.rs:692:5
1: core::panicking::panic_fmt
at
/rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/panicking.rs:75:14
2: core::result::unwrap_failed
at
/rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/library/core/src/result.rs:1704:5
3: core::result::Result<T,E>::unwrap
at
/home/dandan/.rustup/toolchains/1.85.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/result.rs:1109:23
4: test_utf8::main::{{closure}}
at
./datafusion-examples/examples/external_dependency/test_utf8.rs:39:5
5: <core::pin::Pin<P> as core::future::future::Future>::poll
at
/home/dandan/.rustup/toolchains/1.85.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/future.rs:124:9
6: tokio::runtime::park::CachedParkThread::block_on::{{closure}}
at
/home/dandan/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.43.0/src/runtime/park.rs:284:63
7: tokio::runtime::coop::with_budget
at
/home/dandan/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.43.0/src/runtime/coop.rs:107:5
8: tokio::runtime::coop::budget
at
/home/dandan/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.43.0/src/runtime/coop.rs:73:5
9: tokio::runtime::park::CachedParkThread::block_on
at
/home/dandan/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.43.0/src/runtime/park.rs:284:31
10: tokio::runtime::context::blocking::BlockingRegionGuard::block_on
at
/home/dandan/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.43.0/src/runtime/context/blocking.rs:66:9
11:
tokio::runtime::scheduler::multi_thread::MultiThread::block_on::{{closure}}
at
/home/dandan/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.43.0/src/runtime/scheduler/multi_thread/mod.rs:87:13
12: tokio::runtime::context::runtime::enter_runtime
at
/home/dandan/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.43.0/src/runtime/context/runtime.rs:65:16
13: tokio::runtime::scheduler::multi_thread::MultiThread::block_on
at
/home/dandan/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.43.0/src/runtime/scheduler/multi_thread/mod.rs:86:9
14: tokio::runtime::runtime::Runtime::block_on_inner
at
/home/dandan/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.43.0/src/runtime/runtime.rs:370:45
15: tokio::runtime::runtime::Runtime::block_on
at
/home/dandan/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.43.0/src/runtime/runtime.rs:340:13
16: test_utf8::main
at
./datafusion-examples/examples/external_dependency/test_utf8.rs:45:5
```
@jayzhan211
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