pymssql:自适应服务器连接失败

Question

我尝试使用python连接Azure SQL，但得到下一个错误：

File "pymssql.pyx", line 641, in pymssql.connect (pymssql.c:10824)
pymssql.OperationalError: (20002, 'DB-Lib error message 20002, severity 9:\nAdaptive Server connection failed (myserver:1433)\n')

freetds.conf：

[global]
        # TDS protocol version
        tds version = 7.4

        # Whether to write a TDSDUMP file for diagnostic purposes
        # (setting this to /tmp is insecure on a multi-user system)
        dump file = /tmp/freetds.log
;       debug flags = 0xffff

        # Command and connection timeouts
;       timeout = 10
;       connect timeout = 10

        # If you get out-of-memory errors, it may mean that your client
        # is trying to allocate a huge buffer for a TEXT field.
        # Try setting 'text size' to a more reasonable limit
        text size = 64512

如果我尝试连接，使用tsql -连接成功！

我尝试用params重新编译freetds：

./configure --enable-msdblib --enable-threadsafe --enable-sybase-compat --with-tdsver=7.4 --with-openssl=/usr/bin

我用的是这个手册https://msdn.microsoft.com/en-us/library/mt694094(v=sql.1).aspx

Answer 1

我从源pymssql和freetds解决了这个问题(在前面的文章中有选项，在全局配置中设置了tds version=7.3 )。Pymssql从源代码中使用命令"python setup.py build“，然后用于在系统中安装"python setup.py install”。

Answer 2

@Alximik根据我的经验，我不认为有必要通过self重新编译freetds。对于这个问题，我认为问题是由您对freetds.conf的配置引起的，请参阅我对已解决线程pymssql: Connection to the database only works sometimes的答案和下面的示例配置内容。

host = <database_name>.database.windows.net
port = 1433
tds version = 7.3

同时，您可以参考http://www.freetds.org/userguide/freetdsconf.htm来配置它。