Struct MinMaxStatistics 

pub(crate) struct MinMaxStatistics {
    min_by_sort_order: Rows,
    max_by_sort_order: Rows,
    sort_order: LexOrdering,
}

A normalized representation of file min/max statistics that allows for efficient sorting & comparison. The min/max values are ordered by Self::sort_order. Furthermore, any columns that are reversed in the sort order have their min/max values swapped.

Fields

min_by_sort_order: Rows

max_by_sort_order: Rows

sort_order: LexOrdering

Implementations

impl MinMaxStatistics

pub fn sort_order(&self) -> &LexOrdering

Sort order used to sort the statistics

pub fn min(&self, idx: usize) -> Row<'_>

Min value at index

pub fn max(&self, idx: usize) -> Row<'_>

Max value at index

pub fn new_from_files<'a>( projected_sort_order: &LexOrdering, projected_schema: &SchemaRef, projection: Option<&[usize]>, files: impl IntoIterator<Item = &'a PartitionedFile>, ) -> Result<Self>

pub fn new( sort_order: &LexOrdering, schema: &SchemaRef, min_values: RecordBatch, max_values: RecordBatch, ) -> Result<Self>

pub fn min_values_sorted(&self) -> Vec<(usize, Row<'_>)>

Return a sorted list of the min statistics together with the original indices

pub fn is_sorted(&self) -> bool

Check if the min/max statistics are in order and non-overlapping