Michael-J-Ward commented on code in PR #6257:
URL: https://github.com/apache/arrow-rs/pull/6257#discussion_r1719985116
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parquet/src/arrow/arrow_reader/statistics.rs:
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@@ -1195,6 +1197,23 @@ impl<'a> StatisticsConverter<'a> {
self.arrow_field
}
+ /// Set the statistics converter to treat missing null counts as missing
Review Comment:
The default in this PR is `missing_null_counts_as_zero = true`, which
maintains the **old** behavior, right?
If "add this config to maintain old behavior" is acceptable for a breaking
release, then I would expect the default to be the **new** behavior.
IOW, I'd expect what you said on the [parquet mailing
list](https://lists.apache.org/thread/cytmb3n3j72nqmnb90omnvv1w926kth2)
> Applications that use parquet-rs to read parquet_files and interpret the
null_count will need to be changed after the upgrade to explicitly continue
the old behavior of "treat no null_count as 0" which is also documented
now.
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