Use go to add massive data to MySQL

use mysql Create a database Here to create test_big database
Create table

CREATE TABLE `student` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT ' Primary key ',
  `user_name` varchar(255) DEFAULT NULL COMMENT ' full name ',
  `add_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT ' Add the time ',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

Class libraries that need to be used
github.com/go-sql-driver/mysql
github.com/satori/go.uuid
Use it directly go get xxx that will do
Probably 1000 10000 insert data needs 5 About minutes
The code is as follows

package main

import (
	"database/sql"
	"fmt"
	_ "github.com/go-sql-driver/mysql"
	"log"
	"strconv"
	"time"
)

func main() {
	mysql()
}
// Structure 
type Job struct {
	db *sql.DB
	ch chan int
	total int
	n int
}


func mysql(){
	db, err := sql.Open("mysql", "root:[email protected]/test_big?charset=utf8")
	if err != nil {
		fmt.Println(" Error accessing database ", err)
		return
	}
	defer db.Close()
	db.SetConnMaxLifetime(time.Second * 500) // Set connection timeout 500 second 
	db.SetMaxOpenConns(100)                 // Set the maximum number of connections 

	total := 25000
	gonum:=400
	fmt.Println("====start=====")
	start := time.Now()
	//  Test the function of inserting into the database , Maximum synchronization per time 20 Working process 
	jobChan := make(chan Job, 20)
	go worker(jobChan)
	// Count usage times 
	ch := make(chan int,gonum)
	for n := 0; n < gonum; n++ {
		job:=Job{
			db:db,
			ch:ch,
			total:total,
			n:n,
		}
		jobChan <- job
	}
	ii:=0
	for{
		<-ch
		ii++
		if(ii>=gonum){
			break;
		}
	}

	end := time.Now()
	curr := end.Sub(start)
	fmt.Println("run time:", curr)
}

func worker(jobChan <-chan Job) {
	for job := range jobChan {
		go sqlExec(job)
	}
}

func sqlExec(job Job)  {
	buf:=make([]byte,0,job.total)
	buf=append(buf," insert into student(user_name) values "...)
	for i := 0; i < job.total; i++ {
		myid, _ := uuid.NewV4()
		userName := myid.String()
		if i == job.total-1 {
			buf=append(buf,"('" + userName + "');"...)
		} else {
			buf=append(buf,"('" + userName + "'),"...)
		}
	}
	ss:=string(buf)
	fmt.Println(" The first " + strconv.Itoa(job.n) + " Insert... Times 2.5 Ten thousand data ！")
	_, err := job.db.Exec(ss)
	checkErr(err)
	fmt.Println(" complete ---" + strconv.Itoa(job.n) + " Insert... Times 2.5 Ten thousand data ！")
	job.ch<- 1
}

func checkErr(err error) {
	if err != nil {
		panic(err)
	}
}