mapleFU commented on code in PR #8756:
URL: https://github.com/apache/arrow-rs/pull/8756#discussion_r2482281406
##########
parquet/src/file/serialized_reader.rs:
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@@ -471,6 +455,47 @@ pub(crate) fn decode_page(
Ok(result)
}
+/// Decompressed the specified buffer, starting from the specified offset,
using
+/// the provided decompressor if available and applicable. If the buffer is not
+/// compressed, it will be returned as is.
Review Comment:
The code looks good to me but the I don't know if it's "not compressed", if
`decompress_buffer` is called and `decompressed_size == 0` , seems that it
generally means something like "this page only have levels, but not have
non-null values"? ( Point me out if I'm wrong)
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