MySQLでCSVファイルの読み書き

大前提として、CSVファイルを使うユーザーはFILE権限が必要だということをお忘れなきよう。

FILE権限があるか確認

mysql> show grants for current_user();
+------------------------------------------------------------------------------------------------------------+
| Grants for testuser@localhost                                                                                                                                                    |
+-----------------------------------------------------------------------------------------------------------------------------------------+
| GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, ALTER, LOCK TABLES ON *.* TO 'testuser'@'localhost' IDENTIFIED BY PASSWORD '*******' |
+-----------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

FILE権限を与える

mysql> GRANT FILE ON *.* TO testuser@localhost;

読み出し

mysql> SELECT * FROM test_table INTO OUTFILE "/home/hoge/test_table.csv" FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"';

この時、以下のようなエラーが出たらここを参考。ようはパーミッションの問題。なんでもありの/tmpに吐き出す。

ERROR 1 (HY000): Can't create/write to file '/home/hoge/test_table.csv' (Errcode: 13)
mysql> SELECT * FROM test_table INTO OUTFILE "/tmp/test_table.csv" FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"';
Query OK, 17112 rows affected (0.03 sec)

書き込み

mysql>LOAD DATA INFILE "/var/lib/mysql/hoge_db/cc.csv" INTO TABLE user_table FIELDS TERMINATED BY ',' ENCLOSED BY '"';