MySQL における多次元の範囲クエリ

-- Works for containment, but doesn't generalize
SELECT name FROM products
WHERE price BETWEEN 50 AND 200
  AND rating BETWEEN 3.5 AND 5.0
  AND reviews BETWEEN 50 AND 1000;

INSTALL EXTENSION vsql_cube;

CREATE TABLE products (
    id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(255),
    attrs `cube`(3)
);

INSERT INTO products (name, attrs) VALUES
    ('Budget Widget',   '29.99,4.1,320'),
    ('Standard Widget', '79.99,4.4,1250'),
    ('Premium Widget',  '149.99,4.7,890'),
    ('Discount Widget', '19.99,3.2,45'),
    ('Pro Widget',      '199.99,4.8,2100');

-- Products: $50–$200, rating 3.5–5.0, 50–2000 reviews
SET @region = cube_box_nd(50.0, 3.5, 50, 200.0, 5.0, 2000);

SELECT name FROM products
WHERE cube_contains(@region, attrs);

-- 3 products most similar to Standard Widget (79.99, 4.4, 1250)
SET @target = cube_point_nd(79.99, 4.4, 1250);

SELECT name,
       ROUND(cube_distance(attrs, @target), 2) AS distance
FROM products
WHERE name != 'Standard Widget'
ORDER BY cube_distance(attrs, @target)
LIMIT 3;

SET @promo_a = cube_box_nd(0.0, 4.5, 500, 100.0, 5.0, 9999);
SET @promo_b = cube_box_nd(100.0, 4.0, 100, 300.0, 5.0, 9999);

SELECT name FROM products
WHERE cube_overlaps(@promo_a, attrs) OR cube_overlaps(@promo_b, attrs);