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TDengine
“233df79ff8eeb9992f26b1a7ce675dbceaa424ee”上不存在“docs/en/12-data-subscription/share/share-topic-adduser.webp”
未验证 提交 ad4ba3a7 编写于 作者: S Shengliang Guan 提交者： GitHub
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Merge pull request #3705 from taosdata/hotfix/test 

Hotfix/test
上级 48a08cae 17190c6e
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tests/examples/go/src/taosapp/taosapp.go 已删除 100644 → 0
浏览文件 @ 48a08cae
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"database/sql"
"time"
"log"
"fmt"
_ "github.com/taosdata/driver-go/taosSql"
)
func main() {
taosDriverName := "taosSql"
demodb := "demodb"
demot := "demot"
fmt.Printf("\n======== start demo test ========\n")
// open connect to taos server
db, err := sql.Open(taosDriverName, "root:taosdata@/tcp(127.0.0.1:0)/")
if err != nil {
log.Fatalf("Open database error: %s\n", err)
}
defer db.Close()
drop_database(db, demodb)
create_database(db, demodb)
use_database(db, demodb)
create_table(db, demot)
insert_data(db, demot)
select_data(db, demot)
fmt.Printf("\n======== start stmt mode test ========\n")
demodbStmt := "demodbStmt"
demotStmt := "demotStmt"
drop_database_stmt(db, demodbStmt)
create_database_stmt(db, demodbStmt)
use_database_stmt(db, demodbStmt)
create_table_stmt(db, demotStmt)
insert_data_stmt(db, demotStmt)
select_data_stmt(db, demotStmt)
fmt.Printf("\n======== end demo test ========\n")
}
func drop_database(db *sql.DB, demodb string) {
st := time.Now().Nanosecond()
res, err := db.Exec("drop database if exists " + demodb)
checkErr(err, "drop database if exists " + demodb)
affectd, err := res.RowsAffected()
checkErr(err, "drop db, res.RowsAffected")
et := time.Now().Nanosecond()
fmt.Printf("drop database result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
}
func create_database(db *sql.DB, demodb string) {
st := time.Now().Nanosecond()
// create database
res, err := db.Exec("create database " + demodb)
checkErr(err, "create db, db.Exec")
affectd, err := res.RowsAffected()
checkErr(err, "create db, res.RowsAffected")
et := time.Now().Nanosecond()
fmt.Printf("create database result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
return
}
func use_database(db *sql.DB, demodb string) {
st := time.Now().Nanosecond()
// use database
res, err := db.Exec("use " + demodb) // notes: must no quote to db name
checkErr(err, "use db db.Exec")
affectd, err := res.RowsAffected()
checkErr(err, "use db, res.RowsAffected")
et := time.Now().Nanosecond()
fmt.Printf("use database result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
}
func create_table(db *sql.DB, demot string) {
st := time.Now().Nanosecond()
// create table
res, err := db.Exec("create table " + demot + " (ts timestamp, id int, name binary(8), len tinyint, flag bool, notes binary(8), fv float, dv double)")
checkErr(err, "create table db.Exec")
affectd, err := res.RowsAffected()
checkErr(err, "create table res.RowsAffected")
et := time.Now().Nanosecond()
fmt.Printf("create table result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
}
func insert_data(db *sql.DB, demot string) {
st := time.Now().Nanosecond()
// insert data
res, err := db.Exec("insert into " + demot +
" values (now, 100, 'beijing', 10, true, 'one', 123.456, 123.456)" +
" (now+1s, 101, 'shanghai', 11, true, 'two', 789.123, 789.123)" +
" (now+2s, 102, 'shenzhen', 12, false, 'three', 456.789, 456.789)")
checkErr(err, "insert data, db.Exec")
affectd, err := res.RowsAffected()
checkErr(err, "insert data res.RowsAffected")
et := time.Now().Nanosecond()
fmt.Printf("insert data result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
}
func select_data(db *sql.DB, demot string) {
st := time.Now().Nanosecond()
rows, err := db.Query("select * from ? " , demot) // go text mode
checkErr(err, "select db.Query")
fmt.Printf("%10s%s%8s %5s %9s%s %s %8s%s %7s%s %8s%s %4s%s %5s%s\n", " ","ts", " ", "id"," ", "name"," ","len", " ","flag"," ", "notes", " ", "fv", " ", " ", "dv")
var affectd int
for rows.Next() {
var ts string
var name string
var id int
var len int8
var flag bool
var notes string
var fv float32
var dv float64
err = rows.Scan(&ts, &id, &name, &len, &flag, &notes, &fv, &dv)
checkErr(err, "select rows.Scan")
fmt.Printf("%s\t", ts)
fmt.Printf("%d\t",id)
fmt.Printf("%10s\t",name)
fmt.Printf("%d\t",len)
fmt.Printf("%t\t",flag)
fmt.Printf("%s\t",notes)
fmt.Printf("%06.3f\t",fv)
fmt.Printf("%09.6f\n",dv)
affectd++
}
et := time.Now().Nanosecond()
fmt.Printf("insert data result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
fmt.Printf("insert data result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
}
func drop_database_stmt(db *sql.DB,demodb string) {
st := time.Now().Nanosecond()
// drop test db
res, err := db.Exec("drop database if exists " + demodb)
checkErr(err, "drop database " + demodb)
affectd, err := res.RowsAffected()
checkErr(err, "drop db, res.RowsAffected")
et := time.Now().Nanosecond()
fmt.Printf("drop database result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
}
func create_database_stmt(db *sql.DB,demodb string) {
st := time.Now().Nanosecond()
// create database
//var stmt interface{}
stmt, err := db.Prepare("create database ?")
checkErr(err, "create db, db.Prepare")
//var res driver.Result
res, err := stmt.Exec(demodb)
checkErr(err, "create db, stmt.Exec")
//fmt.Printf("Query OK, %d row(s) affected()", res.RowsAffected())
affectd, err := res.RowsAffected()
checkErr(err, "create db, res.RowsAffected")
et := time.Now().Nanosecond()
fmt.Printf("create database result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
}
func use_database_stmt (db *sql.DB,demodb string) {
st := time.Now().Nanosecond()
// create database
//var stmt interface{}
stmt, err := db.Prepare("use " + demodb)
checkErr(err, "use db, db.Prepare")
res, err := stmt.Exec()
checkErr(err, "use db, stmt.Exec")
affectd, err := res.RowsAffected()
checkErr(err, "use db, res.RowsAffected")
et := time.Now().Nanosecond()
fmt.Printf("use database result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
}
func create_table_stmt (db *sql.DB,demot string) {
st := time.Now().Nanosecond()
// create table
// (ts timestamp, id int, name binary(8), len tinyint, flag bool, notes binary(8), fv float, dv double)
stmt, err := db.Prepare("create table ? (? timestamp, ? int, ? binary(10), ? tinyint, ? bool, ? binary(8), ? float, ? double)")
checkErr(err, "create table db.Prepare")
res, err := stmt.Exec(demot, "ts", "id", "name", "len", "flag", "notes", "fv", "dv")
checkErr(err, "create table stmt.Exec")
affectd, err := res.RowsAffected()
checkErr(err, "create table res.RowsAffected")
et := time.Now().Nanosecond()
fmt.Printf("create table result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
}
func insert_data_stmt(db *sql.DB,demot string) {
st := time.Now().Nanosecond()
// insert data into table
stmt, err := db.Prepare("insert into ? values(?, ?, ?, ?, ?, ?, ?, ?) (?, ?, ?, ?, ?, ?, ?, ?) (?, ?, ?, ?, ?, ?, ?, ?)")
checkErr(err, "insert db.Prepare")
res, err := stmt.Exec(demot, "now" , 1000, "'haidian'" , 6, true, "'AI world'", 6987.654, 321.987,
"now+1s", 1001, "'changyang'" , 7, false, "'DeepMode'", 12356.456, 128634.456,
"now+2s", 1002, "'chuangping'" , 8, true, "'database'", 3879.456, 65433478.456,)
checkErr(err, "insert data, stmt.Exec")
affectd, err := res.RowsAffected()
checkErr(err, "res.RowsAffected")
et := time.Now().Nanosecond()
fmt.Printf("insert data result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
}
func select_data_stmt(db *sql.DB, demot string) {
st := time.Now().Nanosecond()
stmt, err := db.Prepare("select ?, ?, ?, ?, ?, ?, ?, ? from ?" ) // go binary mode
checkErr(err, "db.Prepare")
rows, err := stmt.Query("ts", "id","name","len", "flag","notes", "fv", "dv", demot)
checkErr(err, "stmt.Query")
fmt.Printf("%10s%s%8s %5s %8s%s %s %10s%s %7s%s %8s%s %11s%s %14s%s\n", " ","ts", " ", "id"," ", "name"," ","len", " ","flag"," ", "notes", " ", "fv", " ", " ", "dv")
var affectd int
for rows.Next() {
var ts string
var name string
var id int
var len int8
var flag bool
var notes string
var fv float32
var dv float64
err = rows.Scan(&ts, &id, &name, &len, &flag, &notes, &fv, &dv)
//fmt.Println("start scan fields from row.rs, &fv:", &fv)
//err = rows.Scan(&fv)
checkErr(err, "rows.Scan")
fmt.Printf("%s\t", ts)
fmt.Printf("%d\t",id)
fmt.Printf("%10s\t",name)
fmt.Printf("%d\t",len)
fmt.Printf("%t\t",flag)
fmt.Printf("%s\t",notes)
fmt.Printf("%06.3f\t",fv)
fmt.Printf("%09.6f\n",dv)
affectd++
}
et := time.Now().Nanosecond()
fmt.Printf("insert data result:\n %d row(s) affectd (%6.6fs)\n\n", affectd, (float32(et-st))/1E9)
}
func checkErr(err error, prompt string) {
if err != nil {
fmt.Printf("%s\n", prompt)
panic(err)
}
}
tests/examples/go/taosdemo.go 0 → 100644
浏览文件 @ ad4ba3a7
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"database/sql"
"fmt"
_ "github.com/taosdata/driver-go/taosSql"
"os"
"sync"
"runtime"
"strconv"
"time"
"flag"
"math/rand"
//"golang.org/x/sys/unix"
)
const (
maxLocationSize = 32
maxSqlBufSize = 65480
)
var locations = [maxLocationSize]string {
"Beijing", "Shanghai", "Guangzhou", "Shenzhen",
"HangZhou", "Tianjin", "Wuhan", "Changsha",
"Nanjing", "Xian"}
type config struct {
hostName string
serverPort int
user string
password string
dbName string
supTblName string
tablePrefix string
numOftables int
numOfRecordsPerTable int
numOfRecordsPerReq int
numOfThreads int
startTimestamp string
startTs int64
keep int
days int
}
var configPara config
var taosDriverName = "taosSql"
var url string
func init() {
flag.StringVar(&configPara.hostName, "h", "127.0.0.1","The host to connect to TDengine server.")
flag.IntVar(&configPara.serverPort, "p", 6030, "The TCP/IP port number to use for the connection to TDengine server.")
flag.StringVar(&configPara.user, "u", "root", "The TDengine user name to use when connecting to the server.")
flag.StringVar(&configPara.password, "P", "taosdata", "The password to use when connecting to the server.")
flag.StringVar(&configPara.dbName, "d", "test", "Destination database.")
flag.StringVar(&configPara.tablePrefix, "m", "d", "Table prefix name.")
flag.IntVar(&configPara.numOftables, "t", 2, "The number of tables.")
flag.IntVar(&configPara.numOfRecordsPerTable, "n", 10, "The number of records per table.")
flag.IntVar(&configPara.numOfRecordsPerReq, "r", 3, "The number of records per request.")
flag.IntVar(&configPara.numOfThreads, "T", 1, "The number of threads.")
flag.StringVar(&configPara.startTimestamp, "s", "2020-10-01 08:00:00", "The start timestamp for one table.")
flag.Parse()
configPara.keep = 365 * 20
configPara.days = 30
configPara.supTblName = "meters"
startTs, err := time.ParseInLocation("2006-01-02 15:04:05", configPara.startTimestamp, time.Local)
if err==nil {
configPara.startTs = startTs.UnixNano() / 1e6
}
}
func printAllArgs() {
fmt.Printf("\n============= args parse result: =============\n")
fmt.Printf("dbName: %v\n", configPara.hostName)
fmt.Printf("serverPort: %v\n", configPara.serverPort)
fmt.Printf("usr: %v\n", configPara.user)
fmt.Printf("password: %v\n", configPara.password)
fmt.Printf("dbName: %v\n", configPara.dbName)
fmt.Printf("tablePrefix: %v\n", configPara.tablePrefix)
fmt.Printf("numOftables: %v\n", configPara.numOftables)
fmt.Printf("numOfRecordsPerTable: %v\n", configPara.numOfRecordsPerTable)
fmt.Printf("numOfRecordsPerReq: %v\n", configPara.numOfRecordsPerReq)
fmt.Printf("numOfThreads: %v\n", configPara.numOfThreads)
fmt.Printf("startTimestamp: %v[%v]\n", configPara.startTimestamp, configPara.startTs)
fmt.Printf("================================================\n")
}
func main() {
printAllArgs()
fmt.Printf("Please press enter key to continue....\n")
fmt.Scanln()
url = "root:taosdata@/tcp(" + configPara.hostName + ":" + strconv.Itoa(configPara.serverPort) + ")/"
//url = fmt.Sprintf("%s:%s@/tcp(%s:%d)/%s?interpolateParams=true", configPara.user, configPara.password, configPara.hostName, configPara.serverPort, configPara.dbName)
// open connect to taos server
//db, err := sql.Open(taosDriverName, url)
//if err != nil {
// fmt.Println("Open database error: %s\n", err)
// os.Exit(1)
//}
//defer db.Close()
createDatabase(configPara.dbName, configPara.supTblName)
fmt.Printf("======== create database success! ========\n\n")
//create_table(db, stblName)
multiThreadCreateTable(configPara.numOfThreads, configPara.numOftables, configPara.dbName, configPara.tablePrefix)
fmt.Printf("======== create super table and child tables success! ========\n\n")
//insert_data(db, demot)
multiThreadInsertData(configPara.numOfThreads, configPara.numOftables, configPara.dbName, configPara.tablePrefix)
fmt.Printf("======== insert data into child tables success! ========\n\n")
//select_data(db, demot)
selectTest(configPara.dbName, configPara.tablePrefix, configPara.supTblName)
fmt.Printf("======== select data success! ========\n\n")
fmt.Printf("======== end demo ========\n")
}
func createDatabase(dbName string, supTblName string) {
db, err := sql.Open(taosDriverName, url)
if err != nil {
fmt.Println("Open database error: %s\n", err)
os.Exit(1)
}
defer db.Close()
// drop database if exists
sqlStr := "drop database if exists " + dbName
_, err = db.Exec(sqlStr)
checkErr(err, sqlStr)
time.Sleep(time.Second)
// create database
sqlStr = "create database " + dbName + " keep " + strconv.Itoa(configPara.keep) + " days " + strconv.Itoa(configPara.days)
_, err = db.Exec(sqlStr)
checkErr(err, sqlStr)
// use database
//sqlStr = "use " + dbName
//_, err = db.Exec(sqlStr)
//checkErr(err, sqlStr)
sqlStr = "create table if not exists " + dbName + "." + supTblName + " (ts timestamp, current float, voltage int, phase float) tags(location binary(64), groupId int);"
_, err = db.Exec(sqlStr)
checkErr(err, sqlStr)
}
func multiThreadCreateTable(threads int, ntables int, dbName string, tablePrefix string) {
st := time.Now().UnixNano()
if (threads < 1) {
threads = 1;
}
a := ntables / threads;
if (a < 1) {
threads = ntables;
a = 1;
}
b := ntables % threads;
last := 0;
endTblId := 0
wg := sync.WaitGroup{}
for i := 0; i < threads; i++ {
startTblId := last
if (i < b ) {
endTblId = last + a
} else {
endTblId = last + a - 1
}
last = endTblId + 1
wg.Add(1)
go createTable(dbName, tablePrefix, startTblId, endTblId, &wg)
}
wg.Wait()
et := time.Now().UnixNano()
fmt.Printf("create tables spent duration: %6.6fs\n", (float32(et-st))/1e9)
}
func createTable(dbName string, childTblPrefix string, startTblId int, endTblId int, wg *sync.WaitGroup) {
//fmt.Printf("subThread[%d]: create table from %d to %d \n", unix.Gettid(), startTblId, endTblId)
// windows.GetCurrentThreadId()
db, err := sql.Open(taosDriverName, url)
if err != nil {
fmt.Println("Open database error: %s\n", err)
os.Exit(1)
}
defer db.Close()
for i := startTblId; i <= endTblId; i++ {
sqlStr := "create table if not exists " + dbName + "." + childTblPrefix + strconv.Itoa(i) + " using " + dbName + ".meters tags('" + locations[i%maxLocationSize] + "', " + strconv.Itoa(i) + ");"
//fmt.Printf("sqlStr: %v\n", sqlStr)
_, err = db.Exec(sqlStr)
checkErr(err, sqlStr)
}
wg.Done()
runtime.Goexit()
}
func generateRowData(ts int64) string {
voltage := rand.Int() % 1000
current := 200 + rand.Float32()
phase := rand.Float32()
values := "( " + strconv.FormatInt(ts, 10) + ", " + strconv.FormatFloat(float64(current), 'f', 6, 64) + ", " + strconv.Itoa(voltage) + ", " + strconv.FormatFloat(float64(phase), 'f', 6, 64) + " ) "
return values
}
func insertData(dbName string, childTblPrefix string, startTblId int, endTblId int, wg *sync.WaitGroup) {
//fmt.Printf("subThread[%d]: insert data to table from %d to %d \n", unix.Gettid(), startTblId, endTblId)
// windows.GetCurrentThreadId()
db, err := sql.Open(taosDriverName, url)
if err != nil {
fmt.Println("Open database error: %s\n", err)
os.Exit(1)
}
defer db.Close()
tmpTs := configPara.startTs;
//rand.New(rand.NewSource(time.Now().UnixNano()))
for tID := startTblId; tID <= endTblId; tID++{
totalNum := 0
for {
sqlStr := "insert into " + dbName + "." + childTblPrefix + strconv.Itoa(tID) + " values "
currRowNum := 0
for {
tmpTs += 1000
valuesOfRow := generateRowData(tmpTs)
currRowNum += 1
totalNum += 1
sqlStr = fmt.Sprintf("%s %s", sqlStr, valuesOfRow)
if (currRowNum >= configPara.numOfRecordsPerReq || totalNum >= configPara.numOfRecordsPerTable) {
break
}
}
res, err := db.Exec(sqlStr)
checkErr(err, sqlStr)
count, err := res.RowsAffected()
checkErr(err, "rows affected")
if (count != int64(currRowNum)) {
fmt.Printf("insert data, expect affected:%d, actual:%d\n", currRowNum, count)
os.Exit(1)
}
if (totalNum >= configPara.numOfRecordsPerTable) {
break
}
}
}
wg.Done()
runtime.Goexit()
}
func multiThreadInsertData(threads int, ntables int, dbName string, tablePrefix string) {
st := time.Now().UnixNano()
if (threads < 1) {
threads = 1;
}
a := ntables / threads;
if (a < 1) {
threads = ntables;
a = 1;
}
b := ntables % threads;
last := 0;
endTblId := 0
wg := sync.WaitGroup{}
for i := 0; i < threads; i++ {
startTblId := last
if (i < b ) {
endTblId = last + a
} else {
endTblId = last + a - 1
}
last = endTblId + 1
wg.Add(1)
go insertData(dbName, tablePrefix, startTblId , endTblId, &wg)
}
wg.Wait()
et := time.Now().UnixNano()
fmt.Printf("insert data spent duration: %6.6fs\n", (float32(et-st))/1e9)
}
func selectTest(dbName string, tbPrefix string, supTblName string){
db, err := sql.Open(taosDriverName, url)
if err != nil {
fmt.Println("Open database error: %s\n", err)
os.Exit(1)
}
defer db.Close()
// select sql 1
limit := 3
offset := 0
sqlStr := "select * from " + dbName + "." + supTblName + " limit " + strconv.Itoa(limit) + " offset " + strconv.Itoa(offset)
rows, err := db.Query(sqlStr)
checkErr(err, sqlStr)
defer rows.Close()
fmt.Printf("query sql: %s\n", sqlStr)
for rows.Next() {
var (
ts string
current float32
voltage int
phase float32
location string
groupid int
)
err := rows.Scan(&ts, &current, &voltage, &phase, &location, &groupid)
if err != nil {
checkErr(err, "rows scan fail")
}
fmt.Printf("ts:%s\t current:%f\t voltage:%d\t phase:%f\t location:%s\t groupid:%d\n", ts, current, voltage, phase, location, groupid)
}
// check iteration error
if rows.Err() != nil {
checkErr(err, "rows next iteration error")
}
// select sql 2
sqlStr = "select avg(voltage), min(voltage), max(voltage) from " + dbName + "." + tbPrefix + strconv.Itoa( rand.Int() % configPara.numOftables)
rows, err = db.Query(sqlStr)
checkErr(err, sqlStr)
defer rows.Close()
fmt.Printf("\nquery sql: %s\n", sqlStr)
for rows.Next() {
var (
voltageAvg float32
voltageMin int
voltageMax int
)
err := rows.Scan(&voltageAvg, &voltageMin, &voltageMax)
if err != nil {
checkErr(err, "rows scan fail")
}
fmt.Printf("avg(voltage):%f\t min(voltage):%d\t max(voltage):%d\n", voltageAvg, voltageMin, voltageMax)
}
// check iteration error
if rows.Err() != nil {
checkErr(err, "rows next iteration error")
}
// select sql 3
sqlStr = "select last(*) from " + dbName + "." + supTblName
rows, err = db.Query(sqlStr)
checkErr(err, sqlStr)
defer rows.Close()
fmt.Printf("\nquery sql: %s\n", sqlStr)
for rows.Next() {
var (
lastTs string
lastCurrent float32
lastVoltage int
lastPhase float32
)
err := rows.Scan(&lastTs, &lastCurrent, &lastVoltage, &lastPhase)
if err != nil {
checkErr(err, "rows scan fail")
}
fmt.Printf("last(ts):%s\t last(current):%f\t last(voltage):%d\t last(phase):%f\n", lastTs, lastCurrent, lastVoltage, lastPhase)
}
// check iteration error
if rows.Err() != nil {
checkErr(err, "rows next iteration error")
}
}
func checkErr(err error, prompt string) {
if err != nil {
fmt.Printf("%s\n", prompt)
panic(err)
}
}
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