以json格式输出数据库大小（来自Centos7的MariaDB）

Question

Anyone knows how can I output this data in a json format Full output using mysql command . I don't know how can I get them one by one. Using Bash Script. Thanking you ahead of time :)

Basically, The script needs to compute the size of the databaase per GB per client/dbname. Then sent it as json format.

SAMPLE OUTPUT:

{
    "client_code": "information_schema",
    "key": "disk_usage",
    "value": "0.000069"
  },
  {
    "client_code": "mysql",
    "key": "disk_usage",
    "value": "0.000611"
  },
  {
    "client_code": "newdb",
    "key": "disk_usage",
    "value": "1GB"
  }
]

Answer 1

You will need to pass the --json to mysql command line query to get the output in JSON format. More on this here

select table_schema, sum((data_length+index_length)/1024/1024) AS MB from information_schema.tables group by 1; | mysqlsh --json=pretty --sqlc --uri root@192.168.1.141:3306

EDIT :

Although direct JSON outputting without 3rd party apps is not possible yet in MySQL or MariaDB. That said, found an interesting post to convert the normal atomic table to BLOB table and parse it with column_json() function. You can find it here , If you are using CONNECT to data forge then you might find this article useful.

Answer 2

我已经找到了一个解决方案，我要做的是内部连接两个数据库，以便获取值，对于json输出，我使用了一个工具csvtojson。