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示例：

以 gbase 用戶身份，登陸集群節(jié)點(diǎn) 192.168.10.115

$ gccli –no-defaults -ugbase -pgbase -h192.168.10.115

注意：–no-defaults 參數(shù)必須緊跟 gccli 命令，即作為 gccli 命令的第一個(gè)參數(shù)。

查詢結(jié)果導(dǎo)出注意事項(xiàng)

注意事項(xiàng)： rmt:?與 select_syntax 之間不能有空格。

示例：

可正確導(dǎo)出數(shù)據(jù)的語(yǔ)句： rmt:SELECT * FROM cust INTO OUTFILE ‘/home/gbase/temp/cust.txt’;

會(huì)報(bào)語(yǔ)法錯(cuò)誤的語(yǔ)句： rmt: SELECT * FROM cust INTO OUTFILE ‘/home/gbase/temp/cust.txt’; file_path，以及 FIELD_OPTION 中的字段分隔符，字段包圍符，轉(zhuǎn)義標(biāo) 識(shí)符等均必須用單引號(hào)?’?包圍，否則無法正常導(dǎo)出數(shù)據(jù)。

示例：

可正確導(dǎo)出數(shù)據(jù)的語(yǔ)句： rmt:SELECT * FROM cust INTO OUTFILE ‘/home/gbase/temp/cust.txt’; 會(huì)報(bào)語(yǔ)法錯(cuò)誤的語(yǔ)句： rmt:SELECT * FROM cust INTO OUTFILE /home/gbase/temp/cust.txt;

遠(yuǎn)程導(dǎo)出不支持頂層查詢是 UNION 類查詢。

示例：

rmt:SELECT * FROM cust UNION SELECT * FROM product INTO OUTFILE ‘/home/gbase/temp/product.txt’; ERROR 1149 (42000): (GBA-02SC-1001) SELECT INTO OUTFILE with UNION is not supported.

遠(yuǎn)程導(dǎo)出的目標(biāo)文件如果已經(jīng)在本地存在，則不能通過 select @@error_count 來獲得錯(cuò)誤數(shù)，原因?yàn)槲募欠翊嬖谟煽蛻舳伺袛?#xff0c;而 @@error_count 是服務(wù)端變量。

示例：

gbase> create table t(id int);

Query OK, 0 rows affected

gbase> insert into t values(1);

Query OK, 1 row affected

gbase> rmt:select * from t into outfile ‘/home/gbase/t.txt’;

Query OK, 1 row affected

gbase> rmt:select * from t into outfile ‘/home/gbase/t.txt’;

ERROR: File ‘/home/gbase/t.txt’ already exists

gbase> select @@error_count;

+—————+

| @@error_count |

+—————+

| 0 |

+—————+

1 row in set

查詢結(jié)果導(dǎo)出示例

不指定字段分隔符

示例中用到的表及數(shù)據(jù)：

DROP TABLE IF EXISTS cust;

CREATE TABLE cust(c_id INT, c_name VARCHAR(20), c_addr VARCHAR(100));

INSERT INTO cust VALUES (1, ‘xiaoming’, ‘Tianjin’);

INSERT INTO cust VALUES (3, ‘qiaorui’, ‘Hebei’);

INSERT INTO cust VALUES (4, ‘tianfei’, ‘Anhui’);

INSERT INTO cust VALUES (2, ‘zhangling’, ‘Hunan’);

示例 1：

不指定字段分隔符，即使用默認(rèn)字段分隔符?\t?。

gbase> rmt:SELECT * FROM cust INTO OUTFILE ‘/home/gbase/temp/cust.txt’;

Query OK, 4 rows affected

查看導(dǎo)出文件：

$ cat cust.txt 1

xiaoming Tianjin 3 qiaorui Hebei 4 tianfei Anhui 2 zhangling Hunan

指定字段分隔符

示例中用到的表及數(shù)據(jù)：

DROP TABLE IF EXISTS cust;

CREATE TABLE cust(c_id INT, c_name VARCHAR(20), c_addr VARCHAR(100));

INSERT INTO cust VALUES (1, ‘xiaoming’, ‘Tianjin’);

INSERT INTO cust VALUES (3, ‘qiaorui’, ‘Hebei’);

INSERT INTO cust VALUES (4, ‘tianfei’, ‘Anhui’);

INSERT INTO cust VALUES (2, ‘zhangling’, ‘Hunan’);

示例 1：

指定字段分隔符為?,

gbase> rmt:SELECT * FROM cust INTO OUTFILE ‘/home/gbase/temp/cust.txt’ FIELDS TERMINATED BY ‘,’; Query OK, 4 rows affected

查看導(dǎo)出文件：

$ cat cust.txt

1,xiaoming,Tianjin

3,qiaorui,Hebei

4,tianfei,Anhui

2,zhangling,Hunan

示例 2：

指定字段分隔符為?;

gbase> rmt:SELECT * FROM cust INTO OUTFILE ‘/home/gbase/temp/cust.txt’ FIELDS TERMINATED BY ‘;’;

Query OK, 4 rows affected

查看導(dǎo)出文件：

$ cat cust.txt

1;xiaoming;Tianjin

3;qiaorui;Hebei

4;tianfei;Anhui

2;zhangling;Hunan

指定字段包圍符為?"?

示例中用到的表及數(shù)據(jù)：

DROP TABLE IF EXISTS cust;

CREATE TABLE cust(c_id INT, c_name VARCHAR(20), c_addr VARCHAR(100));

INSERT INTO cust VALUES (1, ‘xiaoming’, ‘Tianjin’);

INSERT INTO cust VALUES (3, ‘qiaorui’, ‘Hebei’);

INSERT INTO cust VALUES (4, ‘tianfei’, ‘Anhui’);

INSERT INTO cust VALUES (2, ‘zhangling’, ‘Hunan’);

gbase> rmt:SELECT * FROM cust INTO OUTFILE ‘/home/gbase/temp/cust.txt’ FIELDS TERMINATED BY ‘;’ ENCLOSED BY ‘"’;

Query OK, 4 rows affected

查看導(dǎo)出文件：

$ cat cust.txt

“1”;“xiaoming”;“Tianjin”

“3”;“qiaorui”;“Hebei”

“4”;“tianfei”;“Anhui”

“2”;“zhangling”;“Hunan”

指定轉(zhuǎn)義符為“g”

示例中用到的表及數(shù)據(jù)：

DROP TABLE IF EXISTS product;

CREATE TABLE product (p_id INT, p_name VARCHAR(20), p_desc VARCHAR(100));

INSERT INTO product VALUES (1, ‘qianzi’, ‘qianzi\qianzi’);

INSERT INTO product VALUES (2, ‘bandeng’, ‘ban"deng’);

INSERT INTO product VALUES (4, ‘jiandao’, ‘Hei;bei’);

INSERT INTO product VALUES (3, ‘chazi’, ‘Anh\nui’);

INSERT INTO product VALUES (5, ‘canzhuo’, ‘Hunan’);

gbase> SELECT * FROM product;

+——+———+—————+

| p_id | p_name | p_desc |

+——+———+—————+

| 1 | qianzi | qianzi\qianzi |

| 2 | bandeng | ban"deng |

| 4 | jiandao | Hei;bei |

| 3 | chazi |?ui |

| 5 | canzhuo | Hunan |

+——+———+—————+

5 rows in set

gbase> rmt:SELECT * FROM product INTO OUTFILE ‘/home/gbase/temp/product.txt’ FIELDS TERMINATED BY ‘;’ ESCAPED BY ‘g’;

Query OK, 5 rows affected

查看導(dǎo)出文件：

$ cat product.txt

1;qianzi;qianzi\qianzi

2;bandengg;ban"dengg

4;jiandao;Heig;bei

3;chazi;Anhg ui

5;canzhuo;Hunan

在示例中，“\”沒有被置為“g”，是因?yàn)橹付ㄆ渌址麨檗D(zhuǎn)義字符后， “\”不再被認(rèn)為是特殊字符。 “;”，“\n”均被置為轉(zhuǎn)義符“g”，表示數(shù)據(jù)，而不是字段分隔符“;” 和行分隔符“\n”。 “g”也被前置轉(zhuǎn)義符“g”，因?yàn)椤癵”被指定為轉(zhuǎn)義符后，被作為特殊字符處理

總結(jié)

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