Why can I connect to Azure MS SQL with tsql but not pymssql?

问题:

Where I am today:

TDSVER=7.3 tsql -H example.database.windows.net -U me -D ExampleDB -p 1433 -P notreallymypassword 

This does not:

>>> import pymssql >>> pymssql.connect('example.database.windows.net', user='me', password='notreallymypassword', database='ExampleDB', tds_version='7.3') 

It fails with

Traceback (most recent call last):   File "<stdin>", line 1, in <module>   File "pymssql.pyx", line 635, in pymssql.connect (pymssql.c:10734)   File "_mssql.pyx", line 1902, in _mssql.connect (_mssql.c:21821)   File "_mssql.pyx", line 577, in _mssql.MSSQLConnection.__init__ (_mssql.c:6214)   File "_mssql.pyx", line 1704, in _mssql._tds_ver_str_to_constant (_mssql.c:18845) _mssql.MSSQLException: unrecognized tds version: 7.3 

Okay. Well, that's... strange. So I went back and tried the tsql using TDSVER=7.2, which seemed to work fine.

Trying to connect with tds_version='7.2' gives me:

Traceback (most recent call last):   File "pymssql.pyx", line 635, in pymssql.connect (pymssql.c:10734)   File "_mssql.pyx", line 1902, in _mssql.connect (_mssql.c:21821)   File "_mssql.pyx", line 637, in _mssql.MSSQLConnection.__init__ (_mssql.c:6581)   File "_mssql.pyx", line 1630, in _mssql.maybe_raise_MSSQLDatabaseException (_mssql.c:17524) _mssql.MSSQLDatabaseException: (20002, b'DB-Lib error message 20002, severity 9:\nAdaptive Server connection failed (datawhse.database. windows.net:1433)\n')  During handling of the above exception, another exception occurred:  Traceback (most recent call last):   File "<stdin>", line 1, in <module>   File "pymssql.pyx", line 641, in pymssql.connect (pymssql.c:10824) pymssql.OperationalError: (20002, b'DB-Lib error message 20002, severity 9:\nAdaptive Server connection failed (datawhse.database.windo ws.net:1433)\n') 

So, what gives?

Update 1: pyodbc also fails to connect:

conn = pyodbc.connect('SERVER=example.database.windows.net;Driver=FreeTDS;UID=me@example.database.windows.net;PWD=notmyrealpassword;' , ansi=True) 

My ~/.odbcinst.ini:

[FreeTDS] Description     = MS SQL driver Driver          = /usr/lib64/libtdsodbc.so.0 Driver64        = /usr/lib64/libtdsodbc.so.0 Setup           = /usr/lib64/libtdsS.so.0 Setup64         = /usr/lib64/libtdsS.so.0 UsageCount      = 1 CPTimeout       = CPReuse         = Trace           = Yes 

And this output:

回答1:

It looks like Gord was right: The problem was that pymssql wheel does not have SSL bindings.

I uninstalled it:

python -m pip uninstall pymssql 

Then installed it from source:

python -m pip install --no-binary pymssql pymssql 

This required me to install a few dependencies. But now I can connect with

pymssql.connect('example.database.windows.net',                 user='me',                  password='notreallymypassword',                  database='ExampleDB',                 tds_version='7.2') 

回答2:

Your connection string doesn't look right. It should be something like:

pymssql.connect(server='example.database.windows.net', user='me@example', password='notreallymypassword', database='ExampleDB') 

Note that in your example call to connect(), you are missing a server= parameter; you only had the full server name.

文章来源: Why can I connect to Azure MS SQL with tsql but not pymssql?