self-review and compilation fix

Author: scovich

kernel/src/engine/arrow_utils.rs

@@ -69,6 +69,7 @@ pub(crate) fn make_arrow_error(s: impl Into<String>) -> Error {
     .with_backtrace()
 }
 
+/// Prepares to enumerate row indexes of rows in a parquet file, accounting for row group skipping.
 pub(crate) struct RowIndexBuilder {
     row_group_starting_row_offsets: Vec<Range<i64>>,
     row_group_ordinals: Option<Vec<usize>>,

kernel/src/engine/default/parquet.rs

@@ -468,7 +468,7 @@ mod tests {
             metas.push(FileMeta {
                 location: url.clone(),
                 last_modified: meta.last_modified.timestamp(),
-                size: meta.size.try_into().unwrap(),
+                size: meta.size,
             });
         }