/
main.go
95 lines (89 loc) · 2.41 KB
/
main.go
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package main
import (
"database/sql"
"fmt"
"strconv"
"time"
"github.com/taosdata/driver-go/v3/common"
"github.com/taosdata/driver-go/v3/common/param"
_ "github.com/taosdata/driver-go/v3/taosRestful"
"github.com/taosdata/driver-go/v3/ws/stmt"
)
const (
NumOfSubTable = 10
NumOfRow = 10
)
func main() {
prepare()
config := stmt.NewConfig("ws://127.0.0.1:6041", 0)
config.SetConnectUser("root")
config.SetConnectPass("taosdata")
config.SetConnectDB("power")
config.SetMessageTimeout(common.DefaultMessageTimeout)
config.SetWriteWait(common.DefaultWriteWait)
config.SetErrorHandler(func(connector *stmt.Connector, err error) {
panic(err)
})
config.SetCloseHandler(func() {
fmt.Println("stmt connector closed")
})
connector, err := stmt.NewConnector(config)
if err != nil {
panic(err)
}
stmt, err := connector.Init()
err = stmt.Prepare("INSERT INTO ? USING meters TAGS(?,?) VALUES (?,?,?,?)")
if err != nil {
panic(err)
}
for i := 1; i <= NumOfSubTable; i++ {
tags := param.NewParam(2).AddInt(i).AddBinary([]byte("location"))
err = stmt.SetTableName("d_bind_" + strconv.Itoa(i))
if err != nil {
panic(err)
}
err = stmt.SetTags(tags, param.NewColumnType(2).AddInt().AddBinary(8))
now := time.Now()
params := make([]*param.Param, 4)
params[0] = param.NewParam(NumOfRow)
params[1] = param.NewParam(NumOfRow)
params[2] = param.NewParam(NumOfRow)
params[3] = param.NewParam(NumOfRow)
for i := 0; i < NumOfRow; i++ {
params[0].SetTimestamp(i, now.Add(time.Duration(i)*time.Second), common.PrecisionMilliSecond)
params[1].SetFloat(i, float32(i))
params[2].SetInt(i, i)
params[3].SetFloat(i, float32(i))
}
paramTypes := param.NewColumnType(4).AddTimestamp().AddFloat().AddInt().AddFloat()
err = stmt.BindParam(params, paramTypes)
if err != nil {
panic(err)
}
err = stmt.AddBatch()
if err != nil {
panic(err)
}
err = stmt.Exec()
if err != nil {
panic(err)
}
affected := stmt.GetAffectedRows()
fmt.Println("affected rows:", affected)
}
}
func prepare() {
db, err := sql.Open("taosRestful", "root:taosdata@http(localhost:6041)/")
if err != nil {
panic(err)
}
defer db.Close()
_, err = db.Exec("CREATE DATABASE IF NOT EXISTS power")
if err != nil {
panic(err)
}
_, err = db.Exec("CREATE STABLE IF NOT EXISTS power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (groupId INT, location BINARY(24))")
if err != nil {
panic(err)
}
}