package main

import (
	"time"
	"fmt"
	"log"
	"database/sql"

	_ "github.com/lib/pq"
)

func main() {
	t0 := time.Now()
	db, err := sql.Open("postgres", "host=/run/postgresql")
	if err != nil {
		log.Fatal(err)
	}

	tx, _ := db.Begin()
	d1 := time.Since(t0)
	row := tx.QueryRow("select current_timestamp")
	var db_ts time.Time
	row.Scan(&db_ts)
	fmt.Println(db_ts)
	db.Close()
	d2 := time.Since(t0)
	fmt.Println(d1.Seconds(), "connect")
	fmt.Println(d2.Seconds(), "session")
}