estimate_string_cardinality

simd_kernels::utils

Function estimate_string_cardinality 

Source 
pub fn estimate_string_cardinality<T: Integer>(
    arr: &StringArray<T>,
    sample_size: usize,
) -> f64
Expand description

Estimate cardinality ratio on a sample from a StringArray. Used to quickly figure out the optimal strategy when comparing StringArray and CategoricalArrays.