Struct arrow::compute::LexicographicalComparator

pub struct LexicographicalComparator {
    compare_items: Vec<(Option<NullBuffer>, Box<dyn Fn(usize, usize) -> Ordering + Sync + Send>, SortOptions)>,
}
Expand description

A lexicographical comparator that wraps given array data (columns) and can lexicographically compare data at given two indices. The lifetime is the same at the data wrapped.

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§compare_items: Vec<(Option<NullBuffer>, Box<dyn Fn(usize, usize) -> Ordering + Sync + Send>, SortOptions)>

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impl LexicographicalComparator

pub fn compare(&self, a_idx: usize, b_idx: usize) -> Ordering

lexicographically compare values at the wrapped columns with given indices.

pub fn try_new( columns: &[SortColumn] ) -> Result<LexicographicalComparator, ArrowError>

Create a new lex comparator that will wrap the given sort columns and give comparison results with two indices.

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