Very slow query when counting within combined tables - mysql

Question

I'm having an issue with a particular SQL query running on one of my databases:
select
`map`,
`tier`,
(select count(*) from mapzones a where a.map = b.map
and `track` = 0 and `type` > 0) as `stages`,
(select count(*) from mapzones a where a.map = b.map
and `track` > 0 and `type` > 0) as `bonuses`
from
maptiers b
order by `map` asc;
The response takes ~28-30 seconds to execute, which is much too slow for what I need.
Strangely, when I execute a similar query on another database for a separate gamemode, it takes <100ms, usually <50ms:
select
`mapname`,
`tier`,
(select count(*) from ck_zones a where a.mapname = b.mapname
and `zonegroup` = 0 and (zonetype = 2
or zonetype = 3)) as `stages`,
(select count(*) from ck_zones a where a.mapname = b.mapname
and `zonegroup` > 0 and `zonetype` = 0) as `bonuses`
from
ck_maptier b
order by `mapname` asc;
Server Info
Server version: 8.0.29 - MySQL Community Server - GPL
Collation/Type
First Query's Database (BhopTimer)
Second Query's Database (SurfTimer)
(from Comment)
SELECT a.map, a.tier, b.stage_count
FROM maptiers a
INNER JOIN
(
SELECT DISTINCT map,
COUNT(CASE WHEN (type > 0 AND track = 0) THEN 1 END)
OVER (PARTITION BY map) AS `stage_count`
FROM mapzones
) AS b ON a.map = b.map
ORDER BY a.map;
Create Tables
CREATE TABLE `maptiers` (
`map` varchar(255) NOT NULL,
`tier` int NOT NULL DEFAULT '1',
PRIMARY KEY (`map`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
CREATE TABLE `mapzones` (
`id` int NOT NULL AUTO_INCREMENT,
`map` varchar(255) NOT NULL,
`type` int DEFAULT NULL,
`corner1_x` float DEFAULT NULL,
`corner1_y` float DEFAULT NULL,
`corner1_z` float DEFAULT NULL,
`corner2_x` float DEFAULT NULL,
`corner2_y` float DEFAULT NULL,
`corner2_z` float DEFAULT NULL,
`destination_x` float NOT NULL DEFAULT '0',
`destination_y` float NOT NULL DEFAULT '0',
`destination_z` float NOT NULL DEFAULT '0',
`track` int NOT NULL DEFAULT '0',
`flags` int DEFAULT '0',
`data` int DEFAULT '0',
`form` tinyint DEFAULT NULL,
`target` varchar(63) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=14612 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
CREATE TABLE `ck_maptier` (
`mapname` varchar(54) NOT NULL,
`tier` int NOT NULL,
`maxvelocity` float NOT NULL DEFAULT '3500',
`announcerecord` int NOT NULL DEFAULT '0',
`gravityfix` int NOT NULL DEFAULT '1',
`ranked` int NOT NULL DEFAULT '1',
`stages` int DEFAULT NULL,
`bonuses` int DEFAULT NULL,
PRIMARY KEY (`mapname`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
CREATE TABLE `ck_zones` (
`mapname` varchar(54) NOT NULL,
`zoneid` int NOT NULL DEFAULT '-1',
`zonetype` int DEFAULT '-1',
`zonetypeid` int DEFAULT '-1',
`pointa_x` float DEFAULT '-1',
`pointa_y` float DEFAULT '-1',
`pointa_z` float DEFAULT '-1',
`pointb_x` float DEFAULT '-1',
`pointb_y` float DEFAULT '-1',
`pointb_z` float DEFAULT '-1',
`vis` int DEFAULT '0',
`team` int DEFAULT '0',
`zonegroup` int NOT NULL DEFAULT '0',
`zonename` varchar(128) DEFAULT NULL,
`hookname` varchar(128) DEFAULT 'None',
`targetname` varchar(128) DEFAULT 'player',
`onejumplimit` int NOT NULL DEFAULT '1',
`prespeed` int NOT NULL DEFAULT '350',
PRIMARY KEY (`mapname`,`zoneid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Samples
First Query (BhopTimer)
maptiers.sql
mapzones.sql
Second Query (SurfTimer)
ck_maptier.sql
ck_zones.sql

Answer 1

See if they run faster when turned inside out:
SELECT b.map,
b.tier,
x.stages,
x.bonuses
FROM ( SELECT map,
SUM(track = 0 AND type = 0) AS stages,
SUM(track > 0 AND type > 0) AS bonuses
FROM mapzones
GROUP BY map ) AS x
JOIN maptiers AS b ON b.map = x.map
ORDER BY map ASC;
INDEXes:
mapzones: INDEX(map, track, type)
maptiers: INDEX(map, tier)
(For further discussion, please provide SHOW CREATE TABLE for each table. Also: EXPLAIN SELECT ...)