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Support extracting Int8, Int16, Int32 statistics from Parquet Data Pages #10928

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Description

@alamb

Is your feature request related to a problem or challenge?

Part of #10922

We are adding APIs to efficiently convert the data stored in Parquet's "PageIndex" into ArrayRefs -- which will make it significiantly easier to use this information for pruning and other tasks.

Describe the solution you'd like

Add support to StatisticsConverter::min_page_statistics and StatisticsConverter::max_page_statistics for the types above

pub(crate) fn min_page_statistics<'a, I>(
data_type: Option<&DataType>,
iterator: I,
) -> Result<ArrayRef>
where
I: Iterator<Item = (usize, &'a Index)>,
{
get_data_page_statistics!(Min, data_type, iterator)
}
/// Extracts the max statistics from an iterator
/// of parquet page [`Index`]'es to an [`ArrayRef`]
pub(crate) fn max_page_statistics<'a, I>(
data_type: Option<&DataType>,
iterator: I,
) -> Result<ArrayRef>
where
I: Iterator<Item = (usize, &'a Index)>,
{
get_data_page_statistics!(Max, data_type, iterator)

Describe alternatives you've considered

  1. Update the test for the listed data types following the model of test_int64 (note this API will change slightly in Minor: Improve arrow_statistics tests #10927)
  2. Add any required implementation in
    make_data_page_stats_iterator!(MinInt64DataPageStatsIterator, min, Index::INT64, i64);
    make_data_page_stats_iterator!(MaxInt64DataPageStatsIterator, max, Index::INT64, i64);
    macro_rules! get_data_page_statistics {
    ($stat_type_prefix: ident, $data_type: ident, $iterator: ident) => {
    paste! {
    match $data_type {
    Some(DataType::Int64) => Ok(Arc::new(Int64Array::from_iter([<$stat_type_prefix Int64DataPageStatsIterator>]::new($iterator).flatten()))),
    _ => unimplemented!()
    }
    }
    }
    (follow the model of the row counts, )

Additional context

No response

Activity

  1. changed the title [-]Support extracting `Int8`, `Int16`, `Int32` statistics from Parquet Datapages[/-] [+]Support extracting `Int8`, `Int16`, `Int32` statistics from Parquet Data Pages[/+] on Jun 15, 2024
  2. alamb commented on Jun 15, 2024

    @alamb
    ContributorAuthor
  3. Weijun-H commented on Jun 16, 2024

    @Weijun-H
    Member

    take

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