GBase 8a數據庫集群提供select into outfile方式導出數據到文件，指定本地文件時，數據庫參數gbase_export_directory會自動創建同名的目錄。如果想去掉，需要關閉這個參數。

參數 gbase_export_directory

默認值時1，會自動創建本地導出文件是，創建同名的目錄。

gbase> show variables like '%export_directory%';

+------------------------+-------+

| Variable_name | Value |

+------------------------+-------+

| gbase_export_directory | ON |

+------------------------+-------+

1 row in set (Elapsed: 00:00:00.00)

gbase> select * from t1 into outfile '/home/gbase/t1.txt' fields terminated by ',' ESCAPED BY '' writemode by overwrites;

Query OK, 1 row affected (Elapsed: 00:00:00.03)

查看目錄

ls -l /home/gbase/t1.txt/

total 4

-rw------- 1 gbase gbase 6 Sep 4 11:43 t1.txt

關閉參數

只創建文件，不創建目錄，大部分場景都是這個情況。

如果前面已經運行了帶目錄的，會報錯目標是一個目錄，不是文件，無法覆蓋寫。

DETAIL: (GBA-01EX-700) Gbase general error: I/O operation on /home/gbase/t1.txt failed with error - Is a directory, File name /home/gbase/t1.txt

手工將/home/gbase/t1.txt目錄刪掉后再測試

gbase> set gbase_export_directory =0 ;

Query OK, 0 rows affected (Elapsed: 00:00:00.00)

gbase> show variables like '%export_directory%';

+------------------------+-------+

| Variable_name | Value |

+------------------------+-------+

| gbase_export_directory | OFF |

+------------------------+-------+

1 row in set (Elapsed: 00:00:00.00)

gbase> select * from t1 into outfile '/home/gbase/t1.txt' fields terminated by ',' ESCAPED BY '' writemode by overwrites;

Query OK, 1 row affected (Elapsed: 00:00:00.04)

gbase> system ls -ld /home/gbase/t1.txt

ls: cannot access /home/gbase/t1.txt/: Not a directory

gbase> system ls -l /home/gbase/t1.txt

-rw------- 1 gbase gbase 6 Sep 4 11:46 /home/gbase/t1.txt

gbase>

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