我想我错过了在Python上使用pyodbc通过FreeTDS在Debian机器上进行查询的内容。我无法设置超过前255个字符。当使用FreeTDS查询MS SqlServer时,Python截断255个字符
如果我尝试投SQL数据,在这里描述:ODBC query on MS SQL Server returning first 255 characters only in PHP PDO (FreeTDS)有: SELECT CAST(myText as TEXT) FROM mytable
我得到空/零长度字符串,
我也没有更多的成功测试:变化大小与配置描述下面,我只获得了第255个字符(例如,在我的Win框中,pyodbc可以获得279个字符)。
这里是一个示例查询:
SET TEXTSIZE 2147483647;
SELECT [id], myText , LEN(myText)
FROM mytable
这里是我的/etc/freetds/freetds/conf
: (是什么意思,行@开始?)
[global]
# TDS protocol version
; tds version = 4.2
#!!!added by me
client charset = UTF-8
text size = 4294967295
#!!!/added by me
# 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
#!!!changed by me
#text size = 64512
其他conf文件是:
> cat /etc/odbc.ini #/etc/odbc.ini is empty! is it ok?
> cat /etc/odbcinst.ini
[FreeTDS]
Description=TDS driver (Sybase/MS SQL)
Driver=/usr/lib/odbc/libtdsodbc.so
Setup=/usr/lib/odbc/libtdsS.so
CPTimeout=
CPReuse=
我的SQL服务器是在192.168.1.2
和我通过使用连接:
cnstr = 'DRIVER={FreeTDS};SERVER=192.168.1.2;DATABASE=MyDBName;UID=MyUID;PWD=MYPASSWD'
cursor = cnxn.cursor()
cursor.execute(SQL)
# etc.
感谢ü的任何帮助,
问候