Driver Manager strange behaviour

[rip123]

Hello.
Please excuse me my English, i'm not native English speaker

I'm writing the ODBC driver for new DBMS
i've got stuck with following thing:

When client application calls SQLDescribeCol function
(supplying valid statement handle as a parameter)
driver manager doesn't redirect this call to my driver
all other functions are called normally.
When client application calls SQlDescribeCol
I see log entries in trace file that are containing
2 nested calls of SQLDescribeCol.
One (outer) with a valid statement handle and one
(inner)with handle that never appears in that log before.
inner one returns SQl_INVALID_HANDLE.
both of them are _NOT_ functions from my driver.
I've checked with debugger - SQLDescribeCol in driver is not called.

What this strange behaviour could be related with?

 

[k5tm]

What is the client application?

Tom Morrison

http://www.liant.com

 

[rip123]

this happens for every client i've tried

for example microsoft ODBC test (odbcte32.exe)
which is supplied with MS Platform SDK

in this client I can directly call every ODBC function