corwinjoy commented on code in PR #7342:
URL: https://github.com/apache/arrow-rs/pull/7342#discussion_r2020321937
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parquet/src/arrow/async_reader/mod.rs:
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@@ -172,37 +159,14 @@ impl<T: AsyncRead + AsyncSeek + Unpin + Send>
AsyncFileReader for T {
let footer = ParquetMetaDataReader::decode_footer_tail(&buf)?;
let metadata_len = footer.metadata_length();
- self.seek(SeekFrom::End(-FOOTER_SIZE_I64 - metadata_len as i64))
- .await?;
-
- let mut buf = Vec::with_capacity(metadata_len);
- self.take(metadata_len as _).read_to_end(&mut buf).await?;
-
- let metadata_reader = ParquetMetaDataReader::new();
-
#[cfg(feature = "encryption")]
- let metadata_reader = metadata_reader
-
.with_decryption_properties(options.file_decryption_properties.as_ref());
+ let have_decryptor = options.is_some() &&
Review Comment:
So, looking at the suggestion commit I think it may not work. The problem
here is that after the change we now have 4 execution paths.
1. feature="encryption" + options = Some(&ArrowReaderOptions)
2. feature="encryption" + options = None, looks like the commit does not
handle
3. feature!="encryption" + options = Some(&ArrowReaderOptions)
4. feature!="encryption" + options = None
I think the problem is that decode_footer_metadata does not handle None for
file_decryption_properties (and also this property is not present when
feature!="encryption" which only shows up under some test configurations).
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