Function smartnoise_runtime::components::count::count_distinct[−][src]

pub fn count_distinct<T: Eq + Hash>(data: &ArrayD<T>) -> Result<ArrayD<Integer>>

Gets number of unique values in the data.

Arguments

data - Data for which you want a distinct count.

Return

Number of rows in data.

Example

use ndarray::{ArrayD, arr1, arr2};
use smartnoise_runtime::components::count::count_distinct;
let data = arr2(&[ [false, false, true], [true, false, true] ]).into_dyn();
let distinct = count_distinct(&data).unwrap();
assert_eq!(distinct, arr2(&[ [2, 1, 1] ]).into_dyn());