yjshen commented on code in PR #1990:
URL: https://github.com/apache/arrow-datafusion/pull/1990#discussion_r846565204
##########
datafusion/core/src/datasource/listing/mod.rs:
##########
@@ -32,15 +32,26 @@ pub use table::{ListingOptions, ListingTable,
ListingTableConfig};
pub type PartitionedFileStream =
Pin<Box<dyn Stream<Item = Result<PartitionedFile>> + Send + Sync +
'static>>;
+/// File part identified by [start, end) positions.
Review Comment:
Yes, get the row group midpoint in bytes in
https://github.com/apache/arrow-rs/blob/master/parquet/src/file/serialized_reader.rs#L222-L232,
and check if the midpoint is in the [start, end) range.
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