alamb commented on code in PR #8764:
URL: https://github.com/apache/arrow-rs/pull/8764#discussion_r2498623621
##########
parquet/src/file/serialized_reader.rs:
##########
@@ -398,6 +396,8 @@ pub(crate) fn decode_page(
let decompressed_size = uncompressed_page_size - offset;
let mut decompressed = Vec::with_capacity(uncompressed_page_size);
decompressed.extend_from_slice(&buffer[..offset]);
+ // decompressed size of zero corresponds to a page with only null
values
+ // see
https://github.com/apache/parquet-format/blob/master/README.md#data-pages
Review Comment:
got it - that makes sense. thank you
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