SELECT w.id, w.product_id AS "productId", p.name, p.thumbnail, COALESCE(p.sale_price, p.price) AS price, p.status FROM mall_wishlist w JOIN mall_product p ON p.id = w.product_id WHERE w.owner = #{owner} ORDER BY w.id DESC INSERT INTO mall_wishlist (owner, product_id) VALUES (#{owner}, #{productId}) ON CONFLICT (owner, product_id) DO NOTHING DELETE FROM mall_wishlist WHERE owner = #{owner} AND product_id = #{productId} SELECT COUNT(*) FROM mall_wishlist WHERE owner = #{owner} AND product_id = #{productId}