Question

我能够完全使用Windows 7，但我必须将其移至Linux服务器。我现在正在VM中运行Ubuntu 16.04.1 LTS 64位进行测试，然后再在服务器上复制进程。

我很确定问题出在我的FreeTDS或DSN设置中。
我应该不再浪费时间而只是使用Python吗？或者我对ODBC和unixODBC有同样的问题吗？

Full R脚本：

library(RODBC)

#saving from a .csv to dataframe df
df <- read.csv("./Documents/test.csv")

#creating connection to db
conn <- odbcDriverConnect('myDSN')

#writing
sqlSave(conn, df, tablename = 'dbo.test0', append = F, rownames = F, verbose = TRUE, safer = true, fast = F)

R控制台

> conn <- odbcDriverConnect('myDSN')

返回错误消息：

Warning messages:
1: In odbcDriverConnect("myDSN") :
  [RODBC] ERROR: state IM002, code 0, message [unixODBC][Driver Manager]Data source name not found, and no default driver specified
2: In odbcDriverConnect("myDSN") : ODBC connection failed

这是我的ODBC和FreeTDS配置：

/etc/odbc.ini

[myDSN]
APP = unixodbc
Description     = master on DBNAME
Driver          = TDSdriver
Server          = SERVNAME
Database        = DBNAME
Port            = 1433
Username = UNAME
Password = PW
#Trace           = No
#TraceFile       = /var/log/freetds/freetds--odbc.log

/etc/odbcinst.ini

[FreeTDS]
Description = v0.91 with protocol v7.2
Driver = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so


[myDSN0]
APP = unixodbc
Description     = user on DBNAME
Driver          = TDSdriver
Server          = SERVNAME
Database        = DBNAME
Port            = 1433
Username = UNAME
Password = PW
#Trace           = No
#TraceFile       = /var/log/freetds/freetds--odbc.log

/freetds/freetds.conf

[global]
        # TDS protocol version
;   tds version = 4.2

    # 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

[DSN0]
        host = IPADDRESS 
        port = 1433
        tds version = 7.2
        client charset = UTF-8

Answer 1

我有RODBC - ＆gt; FreeTDS - ＆gt; SQL Server在linux Mint上工作。我配置它已经有一段时间了，但这里有一些（未经测试的）建议：

有一些很好的安装说明： http://www.saltycrane.com/blog/2011/09/notes-sqlalchemy-w-pyodbc-freetds-ubuntu/

当然还有RTFM： http://www.freetds.org/userguide/

您可以使用命令行中的isql mydsn或tsql -S mydsn来缩小问题范围吗？很确定这会告诉您问题出在FreeTDS设置中。

看起来你的odbcinst.ini与我有一些差异：

[TDSDriver]
Description = TDS driver
Driver = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so
Setup = /usr/lib/x86_64-linux-gnu/odbc/libtdsS.so

除了tds version = 8.0之外，我的freetds.conf是相同的，并且我的服务器条目的名称与它在odbc.ini中的条目相同。

这个和文档应该有希望让你到那里。

在Ubuntu中使用R连接到ODBC上的Microsoft SQL Server

1 个答案: