etseidl commented on code in PR #6582:
URL: https://github.com/apache/arrow-rs/pull/6582#discussion_r1806863720
##########
parquet/src/arrow/async_reader/mod.rs:
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@@ -506,6 +506,7 @@ where
let offset_index = self
.metadata
.offset_index()
+ .filter(|index| !index.is_empty())
Review Comment:
It seems the synchronous file reader does a similar filtering step, so this
is probably a good addition. It may not have been an issue in the past since
`MetadataReader` will return `None` rather than `Some([])` for missing indexes.
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