/*
C:\Users\ebata>psql -U postgres -h 192.168.0.23 -p 15432
Password for user postgres:
psql (13.4, server 12.5 (Debian 12.5-1.pgdg100+1))
Type "help" for help.
postgres=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+----------+----------+------------+------------+-----------------------
agent_db | postgres | UTF8 | en_US.utf8 | en_US.utf8 |
postgres | postgres | UTF8 | en_US.utf8 | en_US.utf8 |
template0 | postgres | UTF8 | en_US.utf8 | en_US.utf8 | =c/postgres +
| | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | en_US.utf8 | en_US.utf8 | =c/postgres +
| | | | | postgres=CTc/postgres
yama_db | postgres | UTF8 | en_US.utf8 | en_US.utf8 |
(5 rows)
postgres=# \c agent_db
psql (13.4, server 12.5 (Debian 12.5-1.pgdg100+1))
You are now connected to database "agent_db" as user "postgres".
agent_db=# \dt
List of relations
Schema | Name | Type | Owner
--------+-----------+-------+----------
public | user_list | table | postgres
public | user_log | table | postgres
(2 rows)
agent_db=# select * from user_list;
id | age | type | departure_name | departure_number | departure_lat | departure_lng | arrival_name | arrival_number | arrival_lat | arrival_lng
-----+-----+----------+----------------+------------------+---------------+---------------+----------------------+----------------+-------------+-------------
0 | 51 | tourist | 山口駅 | 9324 | 131.4815191 | 34.172788 | 藩庁門 | 1396 | 34.18463 | 131.471535
1 | 59 | tourist | 山口駅 | 9324 | 131.4815191 | 34.172788 | 五重塔 | 7136 | 34.190132 | 131.4734607
*/
package main
import (
"database/sql"
"fmt"
"log"
_ "github.com/lib/pq" // ←これを追記
)
func main() {
db, err := sql.Open("postgres",
"user=postgres password=password host=192.168.0.23 port=15432 dbname=agent_db sslmode=disable")
if err != nil {
log.Fatal("OpenError: ", err)
}
defer db.Close()
//rows, err := db.Query("select * from user_list")
rows, err := db.Query("select id, age, type, departure_name, departure_number, departure_lat, departure_lng, arrival_name, arrival_number, arrival_lat, arrival_lng from user_list")
if err != nil {
log.Fatal(err)
}
defer rows.Close()
var id, age, departure_number, arrival_number int
var type1, departure_name, arrival_name string
var departure_lat, departure_lng, arrival_lat, arrival_lng float64
for rows.Next() {
//if err := rows.Scan(&dt); err != nil {
if err := rows.Scan(&id, &age, &type1, &departure_name, &departure_number, &departure_lat, &departure_lng, &arrival_name, &arrival_number, &arrival_lat, &arrival_lng); err != nil {
fmt.Println(err)
}
fmt.Println(id, age, type1, departure_name, departure_number, departure_lat, departure_lng, arrival_name, arrival_number, arrival_lat, arrival_lng)
}
}
/*
出力結果
C:\Users\ebata\yamaguchi\src_try1\others>go run .
0 51 tourist 山口駅 9324 131.4815191 34.172788 藩庁門 1396 34.18463 131.471535
1 59 tourist 山口駅 9324 131.4815191 34.172788 五重塔 7136 34.190132 131.4734607
2 55 tourist 湯田温泉駅 7247 131.4606901 34.1597909 ザビエル記念聖堂 2570 34.1796352 131.4728818
3 60 tourist 湯田温泉駅 7247 131.4606901 34.1597909 ザビエル記念聖堂 2570 34.1796352 131.4728818
4 42 tourist 山口駅 9324 131.4815191 34.172788 五重塔 7136 34.190132 131.4734607
*/
← (見えないけど)半角のスペースが入っている。これで行末に" "'(半角スペース)が入る
