我遇到了一个非常奇怪的问题:我能够使用tsql连接到我的SQL Server,但我无法对pymssql做同样的事情。让我给你更多的细节。tsql实用程序(FreeTDS)可以连接到SQL Server,但pymssql不能
有了这种tsql
命令的一切似乎是确定:
$ tsql -H '10.10.10.2' -U 'DOMAIN\myuser' -p 63849
Password:
locale is "fr_FR.UTF-8"
locale charset is "UTF-8"
using default charset "UTF-8"
1>
但以下基本Python脚本我有一个问题:
$ cat test_mssql.py
# -*- coding: utf8 -*-
import pymssql
import pandas as pd
conn = pymssql.connect(server=r'10.10.10.2', user=r'DOMAIN\myuser', password='mypassword', port='63849')
$ python test_mssql.py
Traceback (most recent call last):
File "api-vinci-rh/current/test_mssql.py", line 60, in <module>
conn = pymssql.connect(server=r'10.10.10.2', user=r'DOMAIN\myuser', password='mypassword', port='63849')
File "pymssql.pyx", line 641, in pymssql.connect (pymssql.c:10788)
pymssql.OperationalError: (20002, 'DB-Lib error message 20002, severity 9:\nAdaptive Server connection failed\n')
通过激活TDSDUMPCONFIG环境变量,我可以请参阅tls命令和我的python脚本之间的区别:
TDSDUMPCONFIG tls trace
config.c:224:Final connection parameters:
config.c:225: server_name = 10.10.10.2
config.c:226: server_host_name = 10.10.10.2
config.c:227: ip_addr = 10.10.10.2
config.c:228: instance_name =
config.c:229: port = 63849
config.c:230: major_version = 7
config.c:231: minor_version = 1
config.c:232: block_size = 0
config.c:233: language = us_english
config.c:234: server_charset =
config.c:235: connect_timeout = 0
config.c:236: client_host_name = myhost
config.c:237: client_charset = UTF-8
config.c:238: app_name = TSQL
config.c:239: user_name = DOMAIN\myuser
config.c:242: library = TDS-Library
config.c:243: bulk_copy = 0
config.c:244: suppress_language = 0
config.c:245: encrypt level = 0
config.c:246: query_timeout = 0
config.c:249: database =
config.c:250: dump_file = /tmp/freetds.log
config.c:251: debug_flags = 0
TDSDUMPCONFIG pymssql trace
config.c:224:Final connection parameters:
config.c:225: server_name = 10.10.10.2:63849
config.c:226: server_host_name = 10.10.10.2
config.c:227: ip_addr = 10.10.10.2
config.c:228: instance_name =
config.c:229: port = 63849
config.c:230: major_version = 7
config.c:231: minor_version = 1
config.c:232: block_size = 0
config.c:233: language = us_english
config.c:234: server_charset =
config.c:235: connect_timeout = 0
config.c:236: client_host_name = myhost
config.c:237: client_charset = UTF-8
config.c:238: app_name = pymssql=2.1.2
config.c:239: user_name =
config.c:242: library = DB-Library
config.c:243: bulk_copy = 0
config.c:244: suppress_language = 0
config.c:245: encrypt level = 0
config.c:246: query_timeout = 0
config.c:249: database =
config.c:250: dump_file = /tmp/freetds.log
config.c:251: debug_flags = 0
config.c:252: text_size = 64512
config.c:253: broken_dates = 0
config.c:254: emul_little_endian = 0
config.c:255: server_realm_name =
我认为两个主要区别是关于user_name
,它是python脚本和library
是DB-Library
而不是TDS-Library
是空的。
我目前发现没有办法强制这些参数在python脚本中,我发现没有关于我的问题(错误消息是通用的)的线索。
我使用python 2.7.9和我的ENV pymssql==2.1.2
更多信息:
$ tsql -C
Compile-time settings (established with the "configure" script)
Version: freetds v0.91
freetds.conf directory: /etc/freetds
MS db-lib source compatibility: no
Sybase binary compatibility: yes
Thread safety: yes
iconv library: yes
TDS version: 4.2
iODBC: no
unixodbc: yes
SSPI "trusted" logins: no
Kerberos: yes
$ grep -v '^#' /etc/freetds/freetds.conf
[global]
tds version = 7.1
dump file = /tmp/freetds.log
text size = 64512
enable gssapi delegation = off
如果您有任何线索,以帮助让我知道。
编辑:我还有一个SQL Server实例为我的测试,我的Python脚本工作......在TDSDUMPCONFIG的username
设置。所以Iguess在我的环境上有一些奇怪的东西,但不知道什么
'的Adaptive Server connection'的lenght任何lenght限制或问题?这听起来像Sybase。您确定您没有错误地使用Sybase提供程序吗?微软在20年前购买了Adaptive Server的代码。两家公司都使用TDS和T-SQL这样的名称。 –
在任何情况下,您都没有发布任何* T-SQL代码。你发布的是不同命令行工具的命令行参数。 'tsql'是一个FreeTDS工具。除非你的Python代码*也*使用FreeTDS,你不能使用'tsql'的结果来表明你的代码是OK –
@PanagiotisKanavos你没错:我没有发布和T-SQL代码,但我可以用'tsql'客户端我可以请求数据 – Labynocle