[erlang-questions] Broken error reporting with ODBC app, w/ patch

Ingela Andin <>
Tue Feb 1 14:43:37 CET 2011


Hi Ken!

Yes please follow the patch instruction:
https://github.com/erlang/otp/wiki/submitting-patches
we will be happy to accept this patch, good catch  :)

Regards Ingela Erlang/OTP team  - Ericsson AB

2011/1/31 Alain O'Dea <>:
> On 2011-01-30, at 23:18, Ken Ellis <> wrote:
>
>> The ODBC app does not report informative error messages for connection
>> issues.  It always reports "No SQL-driver information available",
>> which is misleading since something as simple as attempting to connect
>> to a database that does not exist will return this error.  This is due
>> to a bad handle being passed in db_connect in odbcserver.c --
>> incorrectly as a statement handle instead of a db connection handle.
>> See patch below.
>>
>> With the patch you get:
>> {error,"[unixODBC]Sending the authentication packet failed;\nCould not
>> connect to remote server. Connection to database failed."}
>> or
>> {error,"[unixODBC][Driver Manager]Data source name not found, and no
>> default driver specified  Connection to database failed."}
>>
>> In the current version both of the above errors would result in the
>> same message:
>> {error,"No SQL-driver information available. Connection to database failed."}
>>
>> A google search suggests a reasonable amount of time could be saved
>> for those trying to use this package:
>> http://www.google.com/search?q=erlang+odbc+%22No+SQL-driver+information+available%22&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
>>
>> -Ken
>>
>>
>> diff otp_src_R14B01/lib/odbc/c_src/odbcserver.c
>> otp_src_R14B01_working/lib/odbc/c_src/odbcserver.c
>> 475c475
>> <       diagnos = get_diagnos(SQL_HANDLE_STMT, statement_handle(state));
>> ---
>>>      diagnos = get_diagnos(SQL_HANDLE_DBC, connection_handle(state));
>>
>> ________________________________________________________________
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>
> Better error messages for the win :)
>
> Thank you for posting this Ken!
>
> You should send your patch on to  for integration into OTP.  For more information on contributing to OTP see:
> https://github.com/erlang/otp/wiki/submitting-patches
>
> Thanks again,
> Alain
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