// Open new connection. The uri need to have the following syntax:
//
// [PROTOCOL_SPECFIIC*]DBNAME/USER/PASSWD
//
// where protocol spercific part may be empty (this means connection to
// local server using default protocol). Currently possible forms:
// DBNAME/USER/PASSWD
// unix:SOCKPATH*DBNAME/USER/PASSWD
// tcp:ADDR*DBNAME/USER/PASSWD
func (d *Driver) Open(uri string) (driver.Conn, error) {
pd := strings.SplitN(uri, "*", 2)
if len(pd) == 2 {
// Parse protocol part of URI
p := strings.SplitN(pd[0], ":", 2)
if len(p) != 2 {
return nil, errors.New("Wrong protocol part of URI")
}
d.proto = p[0]
d.raddr = p[1]
// Remove protocol part
pd = pd[1:]
}
// Parse database part of URI
dup := strings.SplitN(pd[0], "/", 3)
if len(dup) != 3 {
return nil, errors.New("Wrong database part of URI")
}
d.db = dup[0]
d.user = dup[1]
d.passwd = dup[2]
// Establish the connection
c := conn{mysql.New(d.proto, d.laddr, d.raddr, d.user, d.passwd, d.db)}
for _, q := range d.initCmds {
c.my.Register(q) // Register initialisation commands
}
if err := c.my.Connect(); err != nil {
return nil, errFilter(err)
}
return &c, nil
}
func main() {
user := "******"
pass := "******"
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("Insert into A... ")
for ii := 0; ii < 10; ii++ {
if ii%5 == 0 {
checkedResult(db.Query("insert A values (null, null)"))
} else {
checkedResult(db.Query(
"insert A values ('%d*10= %d', %d)", ii, ii*10, ii*100,
))
}
}
printOK()
fmt.Println("Select from A... ")
rows, res := checkedResult(db.Query("select * from A"))
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()
}
func main() {
user := "******"
pass := "******"
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... ")
_, err = db.Start("create table A (name varchar(9), number int) engine=InnoDB")
checkError(err)
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")
checkError(err)
printOK()
fmt.Print("Begining a new transaction... ")
tr, err := db.Begin()
checkError(err)
printOK()
tr_ins := tr.Do(ins)
fmt.Print("Performing two inserts... ")
_, err = tr_ins.Run("jeden", 1)
checkError(err)
_, err = tr_ins.Run("dwa", 2)
checkError(err)
printOK()
fmt.Print("Commit the transaction... ")
checkError(tr.Commit())
printOK()
fmt.Print("Begining a new transaction... ")
tr, err = db.Begin()
checkError(err)
printOK()
fmt.Print("Performing one insert... ")
_, err = tr.Do(ins).Run("trzy", 3)
checkError(err)
printOK()
fmt.Print("Rollback the transaction... ")
checkError(tr.Rollback())
printOK()
fmt.Println("Select from A... ")
rows, res := checkedResult(sel.Exec())
name := res.Map("name")
number := res.Map("number")
for ii, row := range rows {
fmt.Printf("%d: %-10s %-8d\n", ii, row[name], row[number])
}
fmt.Print("Remove A... ")
checkedResult(db.Query("drop table A"))
printOK()
fmt.Print("Close connection... ")
checkError(db.Close())
printOK()
}
func main() {
user := "******"
pass := "******"
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)
//db.Debug = true
fmt.Printf("Connect to %s:%s... ", proto, addr)
checkError(db.Connect())
printOK()
fmt.Print("Drop 'web' table if exists... ")
_, err := db.Start("DROP TABLE web")
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 'web' table... ")
_, err = db.Start("CREATE TABLE web (url VARCHAR(80), content LONGBLOB)")
checkError(err)
printOK()
fmt.Print("Prepare insert statement... ")
ins, err := db.Prepare("INSERT INTO web VALUES (?, ?)")
checkError(err)
printOK()
fmt.Print("Prepare select statement... ")
sel, err := db.Prepare("SELECT url, OCTET_LENGTH(content) FROM web")
checkError(err)
printOK()
var url string
fmt.Print("Bind insert parameters... ")
ins.Bind(&url, []byte(nil))
printOK()
fmt.Println()
for {
url = ""
fmt.Print("Please enter an URL (blank line terminates input): ")
fmt.Scanln(&url)
if len(url) == 0 {
break
}
if !strings.Contains(url, "://") {
url = "http://" + url
}
http_res, err := http.Get(url)
if err != nil {
fmt.Println(err)
continue
}
// Retrieve response directly into database. Use 8 kB buffer.
checkError(ins.SendLongData(1, http_res.Body, 8192))
_, err = ins.Run()
checkError(err)
}
fmt.Println()
fmt.Print("Select from 'web' table... ")
rows, res, err := sel.Exec()
checkError(err)
printOK()
// Print fields names
fmt.Println()
for _, field := range res.Fields() {
fmt.Printf("%-38s ", field.Name)
}
fmt.Println()
fmt.Println("------------------------------------------------------------")
// Print result
for _, row := range rows {
for ii, col := range row {
if col == nil {
fmt.Print("%-38s ", "NULL")
} else {
fmt.Printf("%-38s ", row.Bin(ii))
}
}
fmt.Println()
}
fmt.Println()
fmt.Print("Hit ENTER to exit ")
fmt.Scanln()
fmt.Print("Remove 'web' table... ")
_, err = db.Start("DROP TABLE web")
checkError(err)
printOK()
fmt.Print("Close connection... ")
checkError(db.Close())
printOK()
}
func main() {
user := "******"
pass := "******"
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()
}
func New(proto, laddr, raddr, user, passwd string, db ...string) *Conn {
return &Conn{
Raw: mysql.New(proto, laddr, raddr, user, passwd, db...),
MaxRetries: 7,
}
}