TDSVersion 保持默认为 7.1 pymssql
TDSVersion keeps defaulting to 7.1 pymssql
重要变化：
以下命令也有效，并为我提供了正确的提示。那么肯定是 pymssql 有问题。
sudo TDSVER=7.1 tsql -H asdf.database.windows.net -p 1433 -U adf@ad -P adsf#adf -D adf
所以我正在与我的 pymssql 和 freetds 驱动程序作斗争。
平台版本等：
Ubuntu16.04
FreeTDS v0.91（由工作的 tsql 使用）
FreeTDS v0.95（pymssql 使用）
pymssql v2.1.3
目标数据库：SQL Azure（最新）
安装说明：https://azure.microsoft.com/en-us/documentation/articles/sql-database-develop-python-simple/
我已经查看了我能找到的每个 freetds.conf 文件：/etc/freetds/freetds.conf ； /root/.freetds.conf
我已将全局TDS 版本设置为8.0。我在我的pymssql.connect中从python的角度进行了覆盖，将版本覆盖为8.0
import os
os.environ['TDSDUMP'] = 'stdout'
import pymssql
conn = pymssql.connect(server='adsf.database.windows.net',
user='asdf@adfs',
password='asdf#adfad',
database='asdd',
tds_version='8.0',
)
我运行诊断工具：
tsql -C 并返回 4.2 作为版本
我运行 将日志转储到标准输出的代码，注意，版本是 7.1。
net.c:202:连接到 191.238.6.43 端口 1433（TDS 版本 7.1）
下面的 tsql 命令对我有用...
sudo TDSVER=8.0 tsql -H asdf.database.windows.net -p 1433 -U adf@ad -P adsf#adf -D adf
注意版本号。它的 8.0。我可以验证我取回了数据，并且可以用它做我想做的一切。
所以这里有一个明显的问题，即 pymssql 如何与 freetds 连接。
这是日志转储的所有输出，以防有人看到我没有看到的东西...
>>> import os
>>> os.environ['TDSDUMP'] = 'stdout'
>>> import pymssql
>>> conn = pymssql.connect(server='xxx.database.windows.net',
... user='xxx@xxx',
... password='xxxx',
... database='xxx',
... tds_version='8.0',
... )
log.c:167:Starting log file for FreeTDS 0.95
on 2016-08-27 20:47:18 with debug flags 0x4fff.
dblib.c:1160:tdsdbopen(0x15d1070, xxx.database.windows.net:1433, [microsoft])
dblib.c:1186:tdsdbopen: dbproc->dbopts = 0x15fa760
dblib.c:1193:tdsdbopen: tds_set_server(0x14eacf0, "xxx.database.windows.net:1433")
dblib.c:258:dblib_get_tds_ctx(void)
dblib.c:1210:tdsdbopen: About to call tds_read_config_info...
config.c:168:Getting connection information for [xxx.database.windows.net:1433].
config.c:172:Attempting to read conf files.
config.c:353:... $FREETDSCONF not set. Trying $FREETDS/etc.
config.c:366:... $FREETDS not set. Trying $HOME.
config.c:296:Found conf file '/root/.freetds.conf' (.freetds.conf).
config.c:495:Looking for section global.
config.c:554: Found section egserver50.
config.c:554: Found section xxx.database.windows.net.
config.c:568: Reached EOF
config.c:495:Looking for section xxx.database.windows.net:1433.
config.c:554: Found section egserver50.
config.c:554: Found section xxx.database.windows.net.
config.c:568: Reached EOF
config.c:302:[xxx.database.windows.net:1433] not found.
config.c:296:Found conf file '/etc/freetds/freetds.conf' (default).
config.c:495:Looking for section global.
config.c:554: Found section global.
config.c:557:Got a match.
config.c:580: text size = '64512'
config.c:554: Found section egserver50.
config.c:554: Found section egserver70.
config.c:568: Reached EOF
config.c:495:Looking for section xxx.database.windows.net:1433.
config.c:554: Found section global.
config.c:554: Found section egserver50.
config.c:554: Found section egserver70.
config.c:568: Reached EOF
config.c:302:[xxx.database.windows.net:1433] not found.
config.c:353:... $FREETDSCONF not set. Trying $FREETDS/etc.
config.c:366:... $FREETDS not set. Trying $HOME.
config.c:296:Found conf file '/root/.freetds.conf' (.freetds.conf).
config.c:495:Looking for section global.
config.c:554: Found section egserver50.
config.c:554: Found section xxx.database.windows.net.
config.c:568: Reached EOF
config.c:495:Looking for section xxx.database.windows.net.
config.c:554: Found section egserver50.
config.c:554: Found section xxx.database.windows.net.
config.c:557:Got a match.
config.c:580: host = 'xxx.database.windows.net'
config.c:617:Found host entry xxx.database.windows.net
config.c:620:IP addr is 191.238.6.43.
config.c:580: port = '1433'
config.c:580: tds version = '8.0'
config.c:886:Setting tds version to 8.0 (0x701).
config.c:568: Reached EOF
config.c:300:Success: [xxx.database.windows.net] defined in /root/.freetds.conf.
config.c:765:Setting 'dump_file' to 'stdout' from $TDSDUMP.
config.c:689:tds_config_login: client_charset is UTF-8.
config.c:696:tds_config_login: database_name is xxx.
config.c:765:Setting 'dump_file' to 'stdout' from $TDSDUMP.
dblib.c:1237:tdsdbopen: Calling tds_connect_and_login(0x15fae30, 0x15fb4f0)
iconv.c:328:tds_iconv_open(0x15fae30, UTF-8)
iconv.c:187:local name for ISO-8859-1 is ISO-8859-1
iconv.c:187:local name for UTF-8 is UTF-8
iconv.c:187:local name for UCS-2LE is UCS-2LE
iconv.c:187:local name for UCS-2BE is UCS-2BE
iconv.c:346:setting up conversions for client charset "UTF-8"
iconv.c:348:preparing iconv for "UTF-8" <-> "UCS-2LE" conversion
iconv.c:395:preparing iconv for "ISO-8859-1" <-> "UCS-2LE" conversion
iconv.c:400:tds_iconv_open: done
net.c:202:Connecting to xxx.xxx.xxx.xxx port 1433 (TDS version 7.1)
net.c:275:tds_open_socket: connect(2) returned "Operation now in progress"
net.c:314:tds_open_socket() succeeded
packet.c:740:Sending packet
0000 12 01 00 34 00 00 00 00-00 00 15 00 06 01 00 1b |...4.... ........|
0010 00 01 02 00 1c 00 0c 03-00 28 00 04 ff 08 00 01 |........ .(......|
0020 55 00 00 02 4d 53 53 51-4c 53 65 72 76 65 72 00 |U...MSSQ LServer.|
0030 08 4d 00 00 - |.M..|
packet.c:639:Received packet
0000 04 01 00 25 00 00 01 00-00 00 15 00 06 01 00 1b |...%.... ........|
0010 00 01 02 00 1c 00 01 03-00 1d 00 00 ff 0c 00 03 |........ ........|
0020 2b 00 00 03 00 - |+....|
login.c:1106:detected flag 3
login.c:472:login packet rejected
query.c:3772:tds_disconnect()
util.c:165:Changed query state from IDLE to DEAD
util.c:322:tdserror(0x14aafa0, 0x15fae30, 20002, 0)
dblib.c:7925:dbperror(0x15fa390, 20002, 0)
dblib.c:7993:dbperror: Calling dblib_err_handler with msgno = 20002; msg->msgtext = "Adaptive Server connection failed (xxx.database.windows.net:1433)"
dblib.c:8015:dbperror: dblib_err_handler for msgno = 20002; msg->msgtext = "Adaptive Server connection failed (xxx.database.windows.net:1433)" -- returns 2 (INT_CANCEL)
util.c:352:tdserror: client library returned TDS_INT_CANCEL(2)
util.c:375:tdserror: returning TDS_INT_CANCEL(2)
dblib.c:1241:tdsdbopen: tds_connect_and_login failed for "xxx.database.windows.net:1433"!
dblib.c:1463:dbclose(0x15fa390)
dblib.c:243:dblib_del_connection(0x7f7f78fbd980, 0x15fae30)
mem.c:648:tds_free_all_results()
dblib.c:290:dblib_release_tds_ctx(1)
dblib.c:5873:dbfreebuf(0x15fa390)
dblib.c:743:dbloginfree(0x15d1070)
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 (ea1eg7cgdn.database.windows.net:1433)\n')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 5, 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 (xxxx.database.windows.net:1433)\n')
很遗憾你没有告诉我们：
- 您希望实际使用哪个 TDS 版本。
- 您使用的是哪个版本的 pymssql 以及您是如何安装它的
如果您尝试使用 TDS 8.0 并看到 pymssql+FreeTDS 使用的是 7.1，那么您
a) 不必担心，因为它们是同一回事。参见 http://www.freetds.org/userguide/choosingtdsprotocol.htm#AEN910
b) 实际上使用 "7.1"，因为 FreeTDS 1.0 不赞成使用 "8.0"。参见 https://github.com/FreeTDS/freetds/blob/1855d0f72aadd998ab133208fcd3f4d168074ab5/NEWS#L6-L7
freetds v0.95 似乎与 Ubuntu 16.04 不兼容，最新版本的 pymssql 也不兼容，因为它随 v0.95 一起提供，而且您似乎无能为力它使用的版本。
我可以通过执行以下操作来实现它：
sudo apt-get install freetds-dev freetds-bin
sudo pip3 install pymssql=2.1.1
另请注意，它不适用于 Anaconda Interpreter。我只测试了 Anaconda Interpreter 和标准的 CPython 解释器。
重要变化：
以下命令也有效，并为我提供了正确的提示。那么肯定是 pymssql 有问题。
sudo TDSVER=7.1 tsql -H asdf.database.windows.net -p 1433 -U adf@ad -P adsf#adf -D adf
所以我正在与我的 pymssql 和 freetds 驱动程序作斗争。
平台版本等：
Ubuntu16.04
FreeTDS v0.91（由工作的 tsql 使用）
FreeTDS v0.95（pymssql 使用）
pymssql v2.1.3
目标数据库：SQL Azure（最新）
安装说明：https://azure.microsoft.com/en-us/documentation/articles/sql-database-develop-python-simple/
我已经查看了我能找到的每个 freetds.conf 文件：/etc/freetds/freetds.conf ； /root/.freetds.conf
我已将全局TDS 版本设置为8.0。我在我的pymssql.connect中从python的角度进行了覆盖，将版本覆盖为8.0
import os
os.environ['TDSDUMP'] = 'stdout'
import pymssql
conn = pymssql.connect(server='adsf.database.windows.net',
user='asdf@adfs',
password='asdf#adfad',
database='asdd',
tds_version='8.0',
)
我运行诊断工具：
tsql -C 并返回 4.2 作为版本
我运行 将日志转储到标准输出的代码，注意，版本是 7.1。
net.c:202:连接到 191.238.6.43 端口 1433（TDS 版本 7.1）
下面的 tsql 命令对我有用...
sudo TDSVER=8.0 tsql -H asdf.database.windows.net -p 1433 -U adf@ad -P adsf#adf -D adf
注意版本号。它的 8.0。我可以验证我取回了数据，并且可以用它做我想做的一切。
所以这里有一个明显的问题，即 pymssql 如何与 freetds 连接。
这是日志转储的所有输出，以防有人看到我没有看到的东西...
>>> import os
>>> os.environ['TDSDUMP'] = 'stdout'
>>> import pymssql
>>> conn = pymssql.connect(server='xxx.database.windows.net',
... user='xxx@xxx',
... password='xxxx',
... database='xxx',
... tds_version='8.0',
... )
log.c:167:Starting log file for FreeTDS 0.95
on 2016-08-27 20:47:18 with debug flags 0x4fff.
dblib.c:1160:tdsdbopen(0x15d1070, xxx.database.windows.net:1433, [microsoft])
dblib.c:1186:tdsdbopen: dbproc->dbopts = 0x15fa760
dblib.c:1193:tdsdbopen: tds_set_server(0x14eacf0, "xxx.database.windows.net:1433")
dblib.c:258:dblib_get_tds_ctx(void)
dblib.c:1210:tdsdbopen: About to call tds_read_config_info...
config.c:168:Getting connection information for [xxx.database.windows.net:1433].
config.c:172:Attempting to read conf files.
config.c:353:... $FREETDSCONF not set. Trying $FREETDS/etc.
config.c:366:... $FREETDS not set. Trying $HOME.
config.c:296:Found conf file '/root/.freetds.conf' (.freetds.conf).
config.c:495:Looking for section global.
config.c:554: Found section egserver50.
config.c:554: Found section xxx.database.windows.net.
config.c:568: Reached EOF
config.c:495:Looking for section xxx.database.windows.net:1433.
config.c:554: Found section egserver50.
config.c:554: Found section xxx.database.windows.net.
config.c:568: Reached EOF
config.c:302:[xxx.database.windows.net:1433] not found.
config.c:296:Found conf file '/etc/freetds/freetds.conf' (default).
config.c:495:Looking for section global.
config.c:554: Found section global.
config.c:557:Got a match.
config.c:580: text size = '64512'
config.c:554: Found section egserver50.
config.c:554: Found section egserver70.
config.c:568: Reached EOF
config.c:495:Looking for section xxx.database.windows.net:1433.
config.c:554: Found section global.
config.c:554: Found section egserver50.
config.c:554: Found section egserver70.
config.c:568: Reached EOF
config.c:302:[xxx.database.windows.net:1433] not found.
config.c:353:... $FREETDSCONF not set. Trying $FREETDS/etc.
config.c:366:... $FREETDS not set. Trying $HOME.
config.c:296:Found conf file '/root/.freetds.conf' (.freetds.conf).
config.c:495:Looking for section global.
config.c:554: Found section egserver50.
config.c:554: Found section xxx.database.windows.net.
config.c:568: Reached EOF
config.c:495:Looking for section xxx.database.windows.net.
config.c:554: Found section egserver50.
config.c:554: Found section xxx.database.windows.net.
config.c:557:Got a match.
config.c:580: host = 'xxx.database.windows.net'
config.c:617:Found host entry xxx.database.windows.net
config.c:620:IP addr is 191.238.6.43.
config.c:580: port = '1433'
config.c:580: tds version = '8.0'
config.c:886:Setting tds version to 8.0 (0x701).
config.c:568: Reached EOF
config.c:300:Success: [xxx.database.windows.net] defined in /root/.freetds.conf.
config.c:765:Setting 'dump_file' to 'stdout' from $TDSDUMP.
config.c:689:tds_config_login: client_charset is UTF-8.
config.c:696:tds_config_login: database_name is xxx.
config.c:765:Setting 'dump_file' to 'stdout' from $TDSDUMP.
dblib.c:1237:tdsdbopen: Calling tds_connect_and_login(0x15fae30, 0x15fb4f0)
iconv.c:328:tds_iconv_open(0x15fae30, UTF-8)
iconv.c:187:local name for ISO-8859-1 is ISO-8859-1
iconv.c:187:local name for UTF-8 is UTF-8
iconv.c:187:local name for UCS-2LE is UCS-2LE
iconv.c:187:local name for UCS-2BE is UCS-2BE
iconv.c:346:setting up conversions for client charset "UTF-8"
iconv.c:348:preparing iconv for "UTF-8" <-> "UCS-2LE" conversion
iconv.c:395:preparing iconv for "ISO-8859-1" <-> "UCS-2LE" conversion
iconv.c:400:tds_iconv_open: done
net.c:202:Connecting to xxx.xxx.xxx.xxx port 1433 (TDS version 7.1)
net.c:275:tds_open_socket: connect(2) returned "Operation now in progress"
net.c:314:tds_open_socket() succeeded
packet.c:740:Sending packet
0000 12 01 00 34 00 00 00 00-00 00 15 00 06 01 00 1b |...4.... ........|
0010 00 01 02 00 1c 00 0c 03-00 28 00 04 ff 08 00 01 |........ .(......|
0020 55 00 00 02 4d 53 53 51-4c 53 65 72 76 65 72 00 |U...MSSQ LServer.|
0030 08 4d 00 00 - |.M..|
packet.c:639:Received packet
0000 04 01 00 25 00 00 01 00-00 00 15 00 06 01 00 1b |...%.... ........|
0010 00 01 02 00 1c 00 01 03-00 1d 00 00 ff 0c 00 03 |........ ........|
0020 2b 00 00 03 00 - |+....|
login.c:1106:detected flag 3
login.c:472:login packet rejected
query.c:3772:tds_disconnect()
util.c:165:Changed query state from IDLE to DEAD
util.c:322:tdserror(0x14aafa0, 0x15fae30, 20002, 0)
dblib.c:7925:dbperror(0x15fa390, 20002, 0)
dblib.c:7993:dbperror: Calling dblib_err_handler with msgno = 20002; msg->msgtext = "Adaptive Server connection failed (xxx.database.windows.net:1433)"
dblib.c:8015:dbperror: dblib_err_handler for msgno = 20002; msg->msgtext = "Adaptive Server connection failed (xxx.database.windows.net:1433)" -- returns 2 (INT_CANCEL)
util.c:352:tdserror: client library returned TDS_INT_CANCEL(2)
util.c:375:tdserror: returning TDS_INT_CANCEL(2)
dblib.c:1241:tdsdbopen: tds_connect_and_login failed for "xxx.database.windows.net:1433"!
dblib.c:1463:dbclose(0x15fa390)
dblib.c:243:dblib_del_connection(0x7f7f78fbd980, 0x15fae30)
mem.c:648:tds_free_all_results()
dblib.c:290:dblib_release_tds_ctx(1)
dblib.c:5873:dbfreebuf(0x15fa390)
dblib.c:743:dbloginfree(0x15d1070)
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 (ea1eg7cgdn.database.windows.net:1433)\n')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 5, 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 (xxxx.database.windows.net:1433)\n')
很遗憾你没有告诉我们：
- 您希望实际使用哪个 TDS 版本。
- 您使用的是哪个版本的 pymssql 以及您是如何安装它的
如果您尝试使用 TDS 8.0 并看到 pymssql+FreeTDS 使用的是 7.1，那么您
a) 不必担心，因为它们是同一回事。参见 http://www.freetds.org/userguide/choosingtdsprotocol.htm#AEN910
b) 实际上使用 "7.1"，因为 FreeTDS 1.0 不赞成使用 "8.0"。参见 https://github.com/FreeTDS/freetds/blob/1855d0f72aadd998ab133208fcd3f4d168074ab5/NEWS#L6-L7
freetds v0.95 似乎与 Ubuntu 16.04 不兼容，最新版本的 pymssql 也不兼容，因为它随 v0.95 一起提供，而且您似乎无能为力它使用的版本。
我可以通过执行以下操作来实现它：
sudo apt-get install freetds-dev freetds-bin
sudo pip3 install pymssql=2.1.1
另请注意，它不适用于 Anaconda Interpreter。我只测试了 Anaconda Interpreter 和标准的 CPython 解释器。