[freetds] Setting for returned column size in FreeTDS?

Lowden, James K james.k.lowden at alliancebernstein.com
Tue Aug 15 10:59:36 EDT 2006


> From: Ken Tozier
> Sent: Tuesday, August 15, 2006 1:03 AM
> 
> On Aug 15, 2006, at 12:25 AM, James K. Lowden wrote:
> > "tsql -C" tells you the compiled-in default.  Usually that's
> > overridden by something in freetds.conf.  The TDSVER environment
> > variable overrides those.  You can check with the TDSDUMP variable;
> > the top of the log shows the protocol version.
> 
> I'd like to keep this as easy as possible for future maintainers.
> If I never explicitly set the TDSVER environment variable, that
> means it doesn't exist, correct? The build stage wouldn't have
> created this variable for me, right? So if I understand correctly,
> the next place it looks is the .conf file and lastly the compiled
> in version, correct?

Correct.  Environment variables are per-session; you can see them with
the "env" command.  "Permanent" ones are created by the shell when it's
started by reading one of its startup files e.g. "${HOME}/.profile".
Installing FreeTDS doesn't affect anything like that.  

> When I ran tsql -C I got this:
> 
> Compile-time settings (established with the "configure" script):
>                          Version: freetds v0.63
>   MS db-lib source compatibility: no
>      Sybase binary compatibility: unknown
>                    Thread safety: yes
>                    iconv library: yes
>                      TDS version: 5.0
>                            iODBC: yes
>                         unixodbc: no

OK, so 5.0 is your default.  

> This is my home development setup though so I'll have to check the
> real thing tomorrow. Basically, for SQL 2003 I'll want to uncomment
>
> # A typical Microsoft SQL Server 2000 configuration
> ;[MyServer2k]
> ;	host = ntmachine.domain.com
> ;	port = 1433
> ;	tds version = 8.0
> 
> and that should fix the 255 char limit problem?

Basically, yes.  Of course you'll want to set the host correctly and
probably rename [MyServer2k].  

There can be more than one freetds.conf.  You can set the TDSDUMPCONFIG
variable to display which ones it looks at when it's invoked.  "export
TDSDUMPCONFIG=stdout" might be useful.  

Regards, 

--jkl



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