[del old go demo file]

tests/examples/go/src/taosapp/taosapp.go

-/*
- * 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)
-    }
-}