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Posted to github@arrow.apache.org by "mapleFU (via GitHub)" <gi...@apache.org> on 2023/06/08 05:58:19 UTC

[GitHub] [arrow] mapleFU commented on pull request #35989: GH-34351: [C++][Parquet] Statistic: tiny optimization and specification

mapleFU commented on PR #35989:
URL: https://github.com/apache/arrow/pull/35989#issuecomment-1581935377

   Some notes:
   1. Builder of `Statistics` will always have `has_null_count_`, and ignore `has_distinct_count_` (not build when building `EncodedStatistics`). `has_min_max_` will be `false` if page is all nulls or nulls and NaN
   2. Reader will able to set `distinct_count` and `has_distinct_count`. Which would be valid, but when it call `Encoded`, the status will not be included in `EncodedStatistics`
   


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