Struct FixedLexicographicalComparator

pub struct FixedLexicographicalComparator<const N: usize> {
    compare_items: [Box<dyn Fn(usize, usize) -> Ordering + Send + Sync>; N],
}

A lexicographical comparator that wraps given array data (columns) and can lexicographically compare data at given two indices. This version of the comparator is for compile-time constant number of columns. The lifetime is the same at the data wrapped.

Fields

compare_items: [Box<dyn Fn(usize, usize) -> Ordering + Send + Sync>; N]

Implementations

impl<const N: usize> FixedLexicographicalComparator<N>

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<FixedLexicographicalComparator<N>, ArrowError>

Create a new lex comparator that will wrap the given sort columns and give comparison results with two indices. The number of columns should be equal to the compile-time constant N.