zone_map_selectivity.rs

use lever::index::zonemap::ZoneMap;

fn main() {
  let customers: Vec<i32> = vec![
      vec![1, 0, -1, -2].repeat(2),
      vec![1, 2, 3, 4].repeat(3)
  ].concat();
  let products = vec![4, 3, 2, 1].repeat(100);
  let payouts = vec![4, 2, 6, 7].repeat(100);

  let ingestion_data = vec![
      ("customers", customers.as_slice()),
      ("products", products.as_slice()),
      ("payouts", payouts.as_slice()),
  ];

  let zone_map = ZoneMap::from(ingestion_data);

  // Selectivity range is: [-2, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4]
  assert_eq!(zone_map.selectivity_range("customers", 4, 4, &*customers), 13);
}