Meituan-Dianping / Meituan-Dianping/SQLAdvisor

只能对简单的单表或2个表 join 做分析,对于复杂SQL冗余或复杂的基本上分析不了

Open
#54 1 comment 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Dominant language
C
Stars
5.6k
Forks
1.2k
PR merge metrics
No merged PRs in 30d

Description

[root@localhost ~]# sqladvisor -u mpup -p mpup -P 3306 -h 127.0.0.1 -d mpup -q "select log_id,user_name,log_type,log_createtime,log_level,log_formatter from (select log_id,user_name,log_type,log_createtime,log_level,log_formatter from (select log_id,user_name,log_type,log_createtime,log_level,log_formatter from LOG order by log_createtime desc,log_id asc ) orderedLog ) logs limit 0, 10;" -v 1
2017-11-09 17:29:17 5726 [Note] 第1步: 对SQL解析优化之后得到的SQL:select log_id AS log_id,user_name AS user_name,log_type AS log_type,log_createtime AS log_createtime,log_level AS log_level,log_formatter AS log_formatter from (select log_id AS log_id,user_name AS user_name,log_type AS log_type,log_createtime AS log_createtime,log_level AS log_level,log_formatter AS log_formatter from (select log_id AS log_id,user_name AS user_name,log_type AS log_type,log_createtime AS log_createtime,log_level AS log_level,log_formatter AS log_formatter from mpup.LOG order by log_createtime desc,log_id) orderedLog) logs limit 0,10

2017-11-09 17:29:17 5726 [Note] 第2步:表* 是临时表,不进行处理

2017-11-09 17:29:17 5726 [Note] 第3步:表* 是临时表,不进行处理

2017-11-09 17:29:17 5726 [Note] 第4步: SQLAdvisor结束!

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the supplied sqladvisor command and compare its output with the nested-query structure in the issue. Trace the SQL analysis path where the derived tables are reported as temporary tables; done should include meaningful analysis or index recommendations for this complex query rather than stopping at those messages.

Written by the indexing model from the issue text.

Assessment

Tech stack
c, mysql
Domain
databases
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.