sql mapping go code

package main

import (
  "fmt"
	_ "github.com/lib/pq"
	_ "github.com/jmoiron/sqlx"
	"database/sql"
	"reflect"
)

func main() {

	db, _ := sql.Open(
		"postgres",
		"user=postgres dbname=go_testing password=postgres sslmode=disable")

	rows, _ := db.Query("SELECT * FROM _user;")

	columns, _ := rows.Columns();

	column2value := make(map[string]*interface{})
	valuePtrs := make([]interface{}, len(columns))

	for rows.Next() {

		for i, column := range columns {
			var value interface{}
			column2value[column] = &value
			valuePtrs[i] = &value
		}

		var scan_errs = rows.Scan(valuePtrs...)

		if (scan_errs != nil) {
			fmt.Println(scan_errs)
		}		

		fmt.Println(column2value);

		for i, _ := range columns {
			val := valuePtrs[i]
			fmt.Println(val)
			fmt.Println(reflect.Indirect(val))
		}
	}
}