连接数据库的方式有两种：TCP和Unix域socket。
本文使用Unix domain sockets连接数据库。关于TCP连接数据库可以参考Go 操作mysql使用举例

package mainimport ( "database/sql" "fmt" "log" _ "github.com/go-sql-driver/mysql")type DBConnectionInfo struct { ID []byte User string Host string DB []byte Cmd string Time []byte State string Info []byte}func(f *DBConnectionInfo) String() string{ return fmt.Sprintf("ID:%s, User:%s, Host:%s, DB:%s, Cmd:%s, Time:%s, State:%s, Info:%s", string(f.ID), f.User, f.Host, string(f.DB), f.Cmd, string(f.Time), f.State, string(f.Info))}const ( mysqlShowProcessList="show processlist")var DB *sql.DB//var dataBase = "root:Aa123456@unix(/tmp/mysql.sock)/mysql"var dataBase = "root:Aa123456@unix(/tmp/mysql.sock)/"func Init() { var err error DB, err = sql.Open("mysql", dataBase) if err != nil { log.Fatalln("open db fail:", err) } err = DB.Ping() if err != nil { log.Fatalln("ping db fail:", err) }}func main() { Init() query()}func query() { rows, err := DB.Query(mysqlShowProcessList) if err != nil { log.Println("query failed:", err) return } defer rows.Close() for rows.Next(){ data := &DBConnectionInfo{} if err := rows.Scan(&data.ID, &data.User, &data.Host, &data.DB, &data.Cmd, &data.Time, &data.State, &data.Info); err != nil { log.Println("Scan failed:", err) } fmt.Println("data:", data) }}

output:

data: ID:145, User:root, Host:localhost, DB:, Cmd:Sleep, Time:632, State:, Info:
data: ID:172, User:root, Host:localhost, DB:, Cmd:Query, Time:0, State:starting, Info:show processlist

参考

https://blog.csdn.net/lanyang123456/article/details/79831537

https://www.cnblogs.com/hanyouchun/p/6708037.html