diff --git a/tests/examples/go/taosdemo.go b/tests/examples/go/taosdemo.go new file mode 100644 index 0000000000000000000000000000000000000000..b42e1e6d703a96bb86454f177a7207577c6d4d4c --- /dev/null +++ b/tests/examples/go/taosdemo.go @@ -0,0 +1,409 @@ +/* + * Copyright (c) 2019 TAOS Data, Inc. + * + * 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 . + */ +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, ¤t, &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) + } +}