explain_union_scan.test

set tidb_cost_model_version=1;
drop table if exists city;

CREATE TABLE `city` (
  `id` varchar(70) NOT NULL,
  `province_id` int(15) DEFAULT NULL,
  `city_name` varchar(90) DEFAULT NULL,
  `description` varchar(90) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;

load stats "s/explain_union_scan.json";

insert into city values("06766b3ef41d484d8878606393f1ed0b", 88, "chongqing", "chongqing city");

begin;

update city set province_id = 77 where id="06766b3ef41d484d8878606393f1ed0b";

explain format = 'brief' select t1.*, t2.province_id as provinceID, t2.city_name as cityName, t3.description as description from city t1 inner join city t2 on t1.id = t2.id left join city t3 on t1.province_id = t3.province_id where t1.province_id > 1 and t1.province_id < 100 limit 10;

commit;