我无法从 MSSQL 服务器获取有效字符串到 python。我相信某处存在编码不匹配。我相信它位于 ODBC 层和 python 之间,因为我能够在 tsql 和 isql 中获得可读的结果。
pyodbc 期望什么字符编码?我需要在链中进行哪些更改才能使其正常工作?
具体例子
这是一个简化的python脚本作为示例:
#!/usr/bin/env python
import pyodbc
dsn = 'yourdb'
user = 'import'
password = 'get0lddata'
database = 'YourDb'
def get_cursor():
con_string = 'DSN=%s;UID=%s;PWD=%s;DATABASE=%s;' % (dsn, user, password, database)
conn = pyodbc.connect(con_string)
return conn.cursor()
if __name__ == '__main__':
c = get_cursor()
c.execute("select id, name from recipe where id = 4140567")
row = c.fetchone()
if row:
print row
这个脚本的输出是:
(Decimal('4140567'), u'\U0072006f\U006e0061\U00650067')
或者,如果脚本的最后一行更改为:
print "{0}, '{1}'".format(row.id, row.name)
那么结果是:
Traceback (most recent call last):
File "/home/mdenson/projects/test.py", line 20, in <module>
print "{0}, '{1}'".format(row.id, row.name)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-2: ordinal not in range(128)
使用tsql执行相同查询的脚本:
root@luke:~# tsql -S cmw -U import -P get0lddata
locale is "C"
locale charset is "ANSI_X3.4-1968"
using default charset "UTF-8"
1> select id, name from recipe where id = 4140567
2> go
id name
4140567 orange2
(1 row affected)
以及在isql中:
root@luke:~# isql -v yourdb import get0lddata
SQL> select id, name from recipe where id = 4140567
+----------------------+--------------------------+
| id | name |
+----------------------+--------------------------+
| 4140567 | orange2 |
+----------------------+--------------------------+
SQLRowCount returns 1
1 rows fetched
所以我早上一直在做这个工作,看起来高高低低,还没有弄清楚有什么问题。
细节
以下是版本详细信息:
- 客户端是 Ubuntu 12.04
- freetds v0.91
- unixodbc 2.2.14
- 蟒蛇2.7.3
pyodbc 2.1.7-1(来自 ubuntu 包)和 3.0.7-beta06(从源代码编译)
服务器是带有 SQL Server Express 2008 R2 的 XP
下面是客户端上几个配置文件的内容。
/etc/freetds/freetds.conf
[global]
tds version = 8.0
text size = 64512
[cmw]
host = 192.168.90.104
port = 1433
tds version = 8.0
client charset = UTF-8
/etc/odbcinst.ini
[FreeTDS]
Description = TDS driver (Sybase/MS SQL)
Driver = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so
Setup = /usr/lib/x86_64-linux-gnu/odbc/libtdsS.so
CPTimeout =
CPReuse =
FileUsage = 1
/etc/odbc.ini
[yourdb]
Driver = FreeTDS
Description = ODBC connection via FreeTDS
Trace = No
Servername = cmw
Database = YourDB
Charset = UTF-8