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package main
import (
"fmt"
"os"
"github.com/ziutek/mymysql/mysql"
_ "github.com/ziutek/mymysql/thrsafe"
)
func printOK() {
fmt.Println("OK")
}
func checkError(err error) {
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
func checkedResult(rows []mysql.Row, res mysql.Result, err error) ([]mysql.Row, mysql.Result) {
checkError(err)
return rows, res
}
func main() {
user := "testuser"
pass := "TestPasswd9"
dbname := "test"
//proto := "unix"
//addr := "/var/run/mysqld/mysqld.sock"
proto := "tcp"
addr := "127.0.0.1:3306"
db := mysql.New(proto, "", addr, user, pass, dbname)
fmt.Printf("Connect to %s:%s... ", proto, addr)
checkError(db.Connect())
printOK()
fmt.Print("Drop A table if exists... ")
_, err := db.Start("drop table A")
if err == nil {
printOK()
} else if e, ok := err.(*mysql.Error); ok {
// Error from MySQL server
fmt.Println(e)
} else {
checkError(err)
}
fmt.Print("Create A table... ")
checkedResult(db.Query("create table A (name varchar(40), number int)"))
printOK()
fmt.Print("Prepare insert statement... ")
ins, err := db.Prepare("insert A values (?, ?)")
checkError(err)
printOK()
fmt.Print("Prepare select statement... ")
sel, err := db.Prepare("select * from A where number > ? or number is null")
checkError(err)
printOK()
params := struct {
txt *string
number *int
}{}
fmt.Print("Bind insert parameters... ")
ins.Bind(¶ms)
printOK()
fmt.Print("Insert into A... ")
for ii := 0; ii < 1000; ii += 100 {
if ii%500 == 0 {
// Assign NULL values to the parameters
params.txt = nil
params.number = nil
} else {
// Modify parameters
str := fmt.Sprintf("%d*10= %d", ii/100, ii/10)
params.txt = &str
params.number = &ii
}
// Execute statement with modified data
_, err = ins.Run()
checkError(err)
}
printOK()
fmt.Println("Select from A... ")
rows, res := checkedResult(sel.Exec(0))
name := res.Map("name")
number := res.Map("number")
for ii, row := range rows {
fmt.Printf(
"Row: %d\n name: %-10s {%#v}\n number: %-8d {%#v}\n", ii,
"'"+row.Str(name)+"'", row[name],
row.Int(number), row[number],
)
}
fmt.Print("Remove A... ")
checkedResult(db.Query("drop table A"))
printOK()
fmt.Print("Close connection... ")
checkError(db.Close())
printOK()
}
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