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vtclient2.go
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vtclient2.go
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// Copyright 2012, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"encoding/json"
"flag"
"fmt"
"os"
"strings"
"time"
log "github.com/golang/glog"
"github.com/youtube/vitess/go/db"
"github.com/youtube/vitess/go/vt/client2"
_ "github.com/youtube/vitess/go/vt/client2/tablet"
"github.com/youtube/vitess/go/vt/logutil"
)
var usage = `
The parameters are first the SQL command, then the bound variables.
For query arguments, we assume place-holders in the query string
in the form of :v0, :v1, etc.
`
var count = flag.Int("count", 1, "how many times to run the query")
var bindvars = FlagMap("bindvars", "bind vars as a json dictionary")
var server = flag.String("server", "localhost:6603/test_keyspace/0", "vtocc server as [user:password@]hostname:port/keyspace/shard[#keyrangestart-keyrangeend]")
var driver = flag.String("driver", "vttablet", "which driver to use (one of vttablet, vttablet-streaming, vtdb, vtdb-streaming)")
var verbose = flag.Bool("verbose", false, "show results")
func init() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
flag.PrintDefaults()
fmt.Fprintf(os.Stderr, usage)
}
}
//----------------------------------
type Map map[string]interface{}
func (m *Map) String() string {
b, err := json.Marshal(*m)
if err != nil {
return err.Error()
}
return string(b)
}
func (m *Map) Set(s string) (err error) {
err = json.Unmarshal([]byte(s), m)
if err != nil {
return err
}
// json reads all numbers as float64
// So, we just ditch floats for bindvars
for k, v := range *m {
f, ok := v.(float64)
if ok {
if f > 0 {
(*m)[k] = uint64(f)
} else {
(*m)[k] = int64(f)
}
}
}
return nil
}
// For internal flag compatibility
func (m *Map) Get() interface{} {
return m
}
func FlagMap(name, usage string) (m map[string]interface{}) {
m = make(map[string]interface{})
mm := Map(m)
flag.Var(&mm, name, usage)
return m
}
// FIXME(alainjobart) this is a cheap trick. Should probably use the
// query parser if we needed this to be 100% reliable.
func isDml(sql string) bool {
lower := strings.TrimSpace(strings.ToLower(sql))
return strings.HasPrefix(lower, "insert") || strings.HasPrefix(lower, "update")
}
func main() {
defer logutil.Flush()
flag.Parse()
args := flag.Args()
if len(args) == 0 {
flag.Usage()
os.Exit(1)
}
client2.RegisterShardedDrivers()
conn, err := db.Open(*driver, *server)
if err != nil {
log.Fatalf("client error: %v", err)
}
log.Infof("Sending the query...")
now := time.Now()
// handle dml
if isDml(args[0]) {
t, err := conn.Begin()
if err != nil {
log.Fatalf("begin failed: %v", err)
}
r, err := conn.Exec(args[0], bindvars)
if err != nil {
log.Fatalf("exec failed: %v", err)
}
err = t.Commit()
if err != nil {
log.Fatalf("commit failed: %v", err)
}
n, err := r.RowsAffected()
log.Infof("Total time: %v / Row affected: %v", time.Now().Sub(now), n)
} else {
// launch the query
r, err := conn.Exec(args[0], bindvars)
if err != nil {
log.Fatalf("client error: %v", err)
}
// get the headers
cols := r.Columns()
if err != nil {
log.Fatalf("client error: %v", err)
}
// print the header
if *verbose {
line := "Index"
for _, field := range cols {
line += "\t" + field
}
log.Infof(line)
}
// get the rows
rowIndex := 0
for row := r.Next(); row != nil; row = r.Next() {
// print the line if needed
if *verbose {
line := fmt.Sprintf("%d", rowIndex)
for _, value := range row {
if value != nil {
switch value.(type) {
case []byte:
line += fmt.Sprintf("\t%s", value)
default:
line += fmt.Sprintf("\t%v", value)
}
} else {
line += "\t"
}
}
log.Infof(line)
}
rowIndex++
}
if err := r.Err(); err != nil {
log.Fatalf("Error %v\n", err)
}
log.Infof("Total time: %v / Row count: %v", time.Now().Sub(now), rowIndex)
}
}