[freetds] ODBC Driver

Peter Deacon peterd at iea-software.com
Tue Oct 5 16:47:04 EDT 2010

On Tue, 5 Oct 2010, Frediano Ziglio wrote:

> Ehmmm... I don't know why but this was in my outgoing folder since 
> 2003... and yesterday my e-mail client decided to send it!

I think this is an omen to get me to finish my transport patches. :)


> 2010/10/4 Frediano Ziglio <freddy77 at gmail.com>
>> Il sab, 2003-03-22 alle 02:41, Peter Deacon ha scritto:
>>> Hi there.
>> Hi Peter.
>>> Grabed the latest freetds snapshot yesterday.  In a few hours I managed
>> to
>>> get ODBC driver working darn near perfect... Thought for sure it would
>>> take weeks of hacking before I'd even be able to login let alone do
>>> anything useful.
>>> We've played with several third party ODBC drivers for MSSQL
>>> and Sybase over the years and I've gotta say from what I've seen so far
>>> FreeTDS is second only to Merant/Data direct/ whatever their called
>> today.
>> Thanks
>>> Best of all, there was already a visual studio project in the tarball..
>>> all I had to do was compile.. Nothing like being able to step from
>>> your application right into the driver (Edit and continue anyone?:)
>>> Heres what I've found so far..
>>> When we call stored procedures have a habbit of using caps to spell out
>>> CALL.  The prepare routine would fail if not all lowercase 'call'.
>> Fixed in CVS
>>> For SQLGetDiagField
>>> Implemented:
>>>       SQL_DIAG_SS_MSGSTATE (The SS functions I set win32 only)
>>>       SQL_DIAG_SS_LINE
>> Good!
>>> numRecord should be decremented after NO_DATA_FOUND check.
>> Fixed in CVS (with another problem...).
>>> Misc:
>>> Return 'Microsoft SQL Server' if using MSSQL from SQLGetInfo
>> Fixed in CVS.
>>> With text datatypes there was an off by one.. It would move the value
>>> pointer back one making the first letter garbage and exclude the
>>> last.
>> I didn't understand...
>>> I've always wondered about where SQLStates come from.  Sybase stores a
>> few
>>> in their sysmessages table however as far as I can tell they don't exist
>>> in the MS sysmessages table.   Cought the bits in freetds where it can
>>> fetch sqlstates from the wire..but it never appears to get called.  If
>>> sqlstate is not otherwise set added lookup tables for MSSQL and Sybase
>>> which map about 150 native errors to SQL States..  Hope this sounds
>>> reasonable?
>> No, simply sql server return sql state itself. Perhaps libtds discard
>> this information... Another problem is translation from odbc2 codes to
>> odbc3 codes...
>>> Anyway have a few weird bits left to check into before posting my diff.
>> Well, post your diff.
>>> You have no idea how cool this is :)
>>> Thanks everyone
>>> -Peter
>>  Frediano Ziglio
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