dmfldr（DM fast Loader）是达梦 8 提供的快速数据加载的命令行。通过 dmfldr 命令行工具能够把按照特定格式排序的文本数据快速、高效的加载到 DM8 数据库系统中，或把 DM8 数据库中的表数据按照一定格式导出到文本文件。

示例1：将文本 test1.txt 中的数据加载到 DM8 中

1)、准备数据文件

$ cat /home/dmdba/test1.txt

1001,XiaoMing,2022-01-23

1002,XiaoLi

1003,XiaoWang,2021-11-11

1004,XiaoMa,2021-11-25

$ 

2）、准备控制文件

$ cat fldrtest.ctl
LOAD DATA
INFILE '/home/dmdba/test1.txt'
INTO TABLE TTT.TEST1
FIELDS ','
$ 

3）、在用户 TTT 下创建测试表

SQL> create table TTT.TEST1(id int,name varchar(20),bir date);
executed successfully
used time: 198.397(ms). Execute id is 2424.
SQL> 

4）、快速加载数据到 DM8 中

$ /dm8/bin/dmfldr SYSDBA/DAMENG123@localhost:5236 control=\'/home/dmdba/test1.ctl\'
open fail! path:./libcrypto.so
dmfldr V8
dmfldr:

Copyright (c) 2011, 2015, Dameng. All rights reserved.

Control file:

Loaded rows: All

Rows per commit to server: 50000

Rows to skip: 0

Errors count allowed: 100

Whether to load direct: Yes

Whether to insert identity column: No

Whether data is sorted by cluster index: No

Character sets:GBK

 

Data file counts: 1
/home/dmdba/test1.txt

Error file :fldr.bad

Dest table :TTT.TEST1

Column Name Packed data type End
ID CHARACTER ,
NAME CHARACTER ,
BIR CHARACTER ,

row buffer number is: 2
task thread number is: 2

Data error
col nums in data file is not enough
Data error
Data error
3 rows committed

Dest table :TTT.TEST1
3 Rows loaded success.
Due to data format error, 4 rows abandon.
Due to data error, 0 rows not loaded.

Skip logic record counts: 0
Read logic record counts: 7
Refuse logic record counts: 0

The total time used: 5.408(ms)

$

5）、查看数据

SQL> select * from TTT.TEST1;

LINEID     ID          NAME       BIR       
---------- ----------- ---------- ----------
1          1           XiaoMing　　2022-01-23
2          3           XiaoWang　　2021-11-11
3          4           XiaoMa　　　2021-11-25

used time: 0.842(ms). Execute id is 2425.
SQL> 

注：从加载日志可以看到由于 test1.txt 的数据格式问题，第二行没有导入到表 test1 中

示例2：将 TTT 用户下的 TEST1 表导出到 test2.txt 中，各字段以 "|" 分隔

1）、准备控制文件

$ cat test2.ctl 
LOAD DATA
INFILE '/home/dmdba/test2.txt'
INTO TABLE TTT.TEST1
FIELDS '|'
$ 

2)、导出数据到 test2.txt

$ /dm8/bin/dmfldr SYSDBA/DAMENG123@localhost:5236 control=\'/home/dmdba/test2.ctl\' mode=\'out\'
open fail! path:./libcrypto.so
dmfldr V8
3 rows is load out
Load finish 3 rows, 
time:51.875(ms)

$ 

3）、查看 test2.txt 文件内容

$ cat test2.txt 
1001|XiaoMing|2022-01-23
1003|XiaoWang|2021-11-11
1004|XiaoMa|2021-11-25
$