hknlof commented on issue #13323:
URL: https://github.com/apache/datafusion/issues/13323#issuecomment-3131126145
This still is happening with DataFusion 49. Using `.parquet` suffix in
output str, aligns to expected behavior of this issue.
```rust
use datafusion::{
dataframe::DataFrameWriteOptions,
prelude::{ParquetReadOptions, SessionContext},
};
#[tokio::main]
async fn main() -> datafusion::error::Result<()> {
let ctx = SessionContext::new();
let options = ParquetReadOptions::new();
let df = ctx
.read_parquet("./data/yellow_tripdata_2025-01.parquet", options)
.await?;
let clone_df = df.clone();
df.write_parquet(
"./data/new_yellow_caps.parquet", // pre-serve the shape of the issue
DataFrameWriteOptions::new().with_single_file_output(true),
None,
)
.await?;
clone_df
.write_parquet(
"./data/new_yellow_caps", // pre-serve the shape of the issue
DataFrameWriteOptions::new().with_single_file_output(true),
None,
)
.await?;
Ok(())
}
```
```console
hknlof@localhost data_samples % find data -type f | sort
data/new_yellow_caps.parquet
data/new_yellow_caps/kWLvaFapgf6OoXk5_0.parquet
data/new_yellow_caps/kWLvaFapgf6OoXk5_1.parquet
data/new_yellow_caps/kWLvaFapgf6OoXk5_2.parquet
data/new_yellow_caps/kWLvaFapgf6OoXk5_3.parquet
data/yellow_tripdata_2025-01.parquet
```
```toml
# Cargo.toml
[package]
name = "data_samples"
version = "0.1.0"
edition = "2024"
[dependencies]
datafusion = "49.0.0"
tokio = { version = "1.47.0", features = ["rt-multi-thread", "tokio-macros"]
}
```
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