adriangb commented on PR #18627:
URL: https://github.com/apache/datafusion/pull/18627#issuecomment-3517686928
This is the tracer bullet I've been using to guide this change:
```
use arrow::util::pretty::pretty_format_batches;
use arrow_schema::DataType;
use datafusion::{
common::Result,
prelude::{ParquetReadOptions, SessionContext},
};
#[tokio::main]
async fn main() -> Result<()> {
let ctx = SessionContext::new();
let df = ctx
.read_parquet(
"data/",
ParquetReadOptions::default()
.table_partition_cols(vec![("b".to_string(),
DataType::UInt32)]),
)
.await?;
let res = df
.select_exprs(&["b", "a", "a = b", "a * 2"])?
.collect()
.await?;
println!("Result:\n{}", pretty_format_batches(&res)?);
Ok(())
}
```
I plan to come back now, do a review and cleanup, handle the protobuf stuff
(I know that needs to be changed) and then fix all the rest of the tests.
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