kou commented on code in PR #47463:
URL: https://github.com/apache/arrow/pull/47463#discussion_r2326077293
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cpp/src/arrow/array/statistics.h:
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@@ -82,6 +83,11 @@ struct ARROW_EXPORT ArrayStatistics {
/// and when set to `double`, it represents `approximate_distinct_count`.
std::optional<CountType> distinct_count = std::nullopt;
+ /// \brief The maximum length in bytes among the rows of an array, may not
be set
Review Comment:
The `average_byte_width` document uses "of a row" but this uses "among the
rows". What is the difference of them?
What is expected `max_byte_width` for `["a", "ab", "abc", "x"]`? I think
it's `3` (`max(1, 2, 3, 1)`). Does "among the rows" means `7` (`1 + 2 + 3 +
1`)?
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