mysql - MySQL 查询性能非常慢

问题描述

我有一个大约需要18 秒才能完成的查询：

查询：

SELECT YEAR(c.date), MONTH(c.date), p.district_id, COUNT(p.owner_id)
FROM commission c
  INNER JOIN partner p ON c.customer_id = p.id
WHERE (c.date BETWEEN '2018-01-01' AND '2018-12-31')
  AND (c.company_id = 90)
  AND (c.source = 'ACTUAL')
  AND (p.id IN (3062, 3063, 3064, 3065, 3066, 3067, 3068, 3069, 3070, 3071,
    3072, 3073, 3074, 3075, 3076, 3077, 3078, 3079, 3081, 3082, 3083, 3084,
    3085, 3086, 3087, 3088, 3089, 3090, 3091, 3092, 3093, 3094, 3095, 3096,
    3097, 3098, 3099, 3448, 3449, 3450, 3451, 3452, 3453, 3454, 3455, 3456,
    3457, 3458, 3459, 3460, 3461, 3471, 3490, 3491, 6307, 6368, 6421))
  GROUP BY YEAR(c.date), MONTH(c.date), p.district_id

该commission表有大约280 万条记录，其中860 000多条属于当前 2018 年。该partner表目前有 8600 多条记录。

结果

| `YEAR(c.date)` | `MONTH(c.date)` | district_id | `COUNT(c.id)` | 
|----------------|-----------------|-------------|---------------| 
| 2018           | 1               | 1           | 19154         | 
| 2018           | 1               | 5           | 9184          | 
| 2018           | 1               | 6           | 2706          | 
| 2018           | 1               | 12          | 36296         | 
| 2018           | 1               | 15          | 13085         | 
| 2018           | 2               | 1           | 21231         | 
| 2018           | 2               | 5           | 10242         | 
| ...            | ...             | ...         | ...           | 

55 rows retrieved starting from 1 in 18 s 374 ms 
(execution: 18 s 368 ms, fetching: 6 ms)

解释：

| id | select_type | table | partitions | type  | possible_keys                                                                                        | key                  | key_len | ref             | rows | filtered | extra                                        | 
|----|-------------|-------|------------|-------|------------------------------------------------------------------------------------------------------|----------------------|---------|-----------------|------|----------|----------------------------------------------| 
| 1  | SIMPLE      | p     | null       | range | PRIMARY                                                                                              | PRIMARY              | 4       |                 | 57   | 100      | Using where; Using temporary; Using filesort | 
| 1  | SIMPLE      | c     | null       | ref   | UNIQ_6F7146F0979B1AD62FC0CB0F5F8A7F73,IDX_6F7146F09395C3F3,IDX_6F7146F0979B1AD6,IDX_6F7146F0AA9E377A | IDX_6F7146F09395C3F3 | 5       | p.id            | 6716 | 8.33     | Using where                                  |

DDL：

create table if not exists commission (
    id int auto_increment
        primary key,
    date date not null,
    source enum('ACTUAL', 'EXPECTED') not null,
    customer_id int null,
    transaction_id varchar(255) not null,
    company_id int null,
    constraint UNIQ_6F7146F0979B1AD62FC0CB0F5F8A7F73 unique (company_id, transaction_id, source),
    constraint FK_6F7146F09395C3F3 foreign key (customer_id) references partner (id),
    constraint FK_6F7146F0979B1AD6 foreign key (company_id) references companies (id)
) collate=utf8_unicode_ci;
create index IDX_6F7146F09395C3F3 on commission (customer_id);
create index IDX_6F7146F0979B1AD6 on commission (company_id);
create index IDX_6F7146F0AA9E377A on commission (date);

我注意到通过删除伙伴IN条件 MySQL 只需要 3 秒。我试图替换它做一些疯狂的事情：

AND (',3062,3063,3064,3065,3066,3067,3068,3069,3070,3071,3072,3073,3074,3075,3076,3077,3078,3079,3081,3082,3083,3084,3085,3086,3087,3088,3089,3090,3091,3092,3093,3094,3095,3096,3097,3098,3099,3448,3449,3450,3451,3452,3453,3454,3455,3456,3457,3458,3459,3460,3461,3471,3490,3491,6307,6368,6421,'
     LIKE CONCAT('%,', p.id, ',%'))

结果大约是 5 秒……太棒了！但这是一个黑客。

IN当我使用语句时，为什么这个查询需要很长的执行时间？解决方法、提示、链接等。谢谢！

标签： mysqlquery-performancemysql-5.7

mysql - MySQL 查询性能非常慢

问题描述

解决方案

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