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package main
import (
"bufio"
"database/sql"
"flag"
"fmt"
"io"
"os"
"time"
_ "github.com/denisenkom/go-mssqldb"
)
func main() {
var (
userid = flag.String("U", "", "login_id")
password = flag.String("P", "", "password")
server = flag.String("S", "localhost", "server_name[\\instance_name]")
database = flag.String("d", "", "db_name")
)
flag.Parse()
dsn := "server=" + *server + ";user id=" + *userid + ";password=" + *password + ";database=" + *database
db, err := sql.Open("mssql", dsn)
if err != nil {
fmt.Println("Cannot connect: ", err.Error())
return
}
err = db.Ping()
if err != nil {
fmt.Println("Cannot connect: ", err.Error())
return
}
defer db.Close()
r := bufio.NewReader(os.Stdin)
for {
_, err = os.Stdout.Write([]byte("> "))
if err != nil {
fmt.Println(err)
return
}
cmd, err := r.ReadString('\n')
if err != nil {
if err == io.EOF {
fmt.Println()
return
}
fmt.Println(err)
return
}
err = exec(db, cmd)
if err != nil {
fmt.Println(err)
}
}
}
func exec(db *sql.DB, cmd string) error {
rows, err := db.Query(cmd)
if err != nil {
return err
}
defer rows.Close()
cols, err := rows.Columns()
if err != nil {
return err
}
if cols == nil {
return nil
}
vals := make([]interface{}, len(cols))
for i := 0; i < len(cols); i++ {
vals[i] = new(interface{})
if i != 0 {
fmt.Print("\t")
}
fmt.Print(cols[i])
}
fmt.Println()
for rows.Next() {
err = rows.Scan(vals...)
if err != nil {
fmt.Println(err)
continue
}
for i := 0; i < len(vals); i++ {
if i != 0 {
fmt.Print("\t")
}
printValue(vals[i].(*interface{}))
}
fmt.Println()
}
if rows.Err() != nil {
return rows.Err()
}
return nil
}
func printValue(pval *interface{}) {
switch v := (*pval).(type) {
case nil:
fmt.Print("NULL")
case bool:
if v {
fmt.Print("1")
} else {
fmt.Print("0")
}
case []byte:
fmt.Print(string(v))
case time.Time:
fmt.Print(v.Format("2006-01-02 15:04:05.999"))
default:
fmt.Print(v)
}
}
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