alamb commented on code in PR #7307:
URL: https://github.com/apache/arrow-rs/pull/7307#discussion_r2380110050
##########
parquet/src/arrow/array_reader/builder.rs:
##########
@@ -52,12 +70,13 @@ fn build_reader(
field: &ParquetField,
mask: &ProjectionMask,
row_groups: &dyn RowGroups,
+ row_number_column: Option<&str>,
Review Comment:
🤔 maybe we could add an arrow extension type, similarly to what we are doing
with Variant and Geometry -- so someone would request a column "foo: int64"
with an arrow extension type of "row_number" or something 🤔
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