DOCUMENT:Q201061  23-APR-2000  [odbc]
TITLE   :FIX: MDAC 2.0 SQL Server ODBC Driver Hangs On SQLDescribeCol()
PRODUCT :Open Database Connectivity (ODBC)
PROD/VER:WINDOWS:3.5,3.6
OPER/SYS:
KEYWORDS:kbDatabase kbODBC kbSQLServ650bug kbODBC350bug kbODBC360bug kbSQLServ650bug kbSQLServ65

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The information in this article applies to:

 - Microsoft ODBC Driver for SQL Server, versions 3.5, 3.6 
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BUG #: 50383 (SQLBUG_70)

SYMPTOMS
========

Applications using the following versions of the Microsoft SQL Server ODBC
Driver hang on calls to SQLDescribeCol(), after SQLPrepare() is called, if the
prepared SQL statement contains derived tables:

 - Version 3.50.0305

 - Version 3.50.0306

 - Version 3.60.0319

WORKAROUND
==========

Call SQLDescribeCol() after calling SQLExecute() and SQLExecDirect().

NOTE: This problem does not occur in version 2.65.0252 or earlier versions of the
driver.

STATUS
======

Microsoft has confirmed this to be a problem in the Microsoft SQL Server ODBC
Driver versions 3.50.0305, 3.50.0306, or 3.60.0319.

This problem was corrected in the Microsoft SQL Server ODBC Driver version
3.70.0623.

MORE INFORMATION
================

Example
-------

Using ODBCTest connect to the pubs database in SQL Server and call SQLPrepare()
on the following query. Next, call SQLDescribeCol() on the first column.

   select c35
   from (select T1.discounttype c35, sum(T1.discount) c36
         from pubs.dbo.discounts T1 group by T1.discounttype) D2

Additional query words:

======================================================================
Keywords          : kbDatabase kbODBC kbSQLServ650bug kbODBC350bug kbODBC360bug kbSQLServ650bug kbSQLServ650sp5fix kbDSupport kbbuglist
Technology        : kbSQLServSearch kbAudDeveloper kbODBCSearch kbODBCSQLServ350 kbODBCSQLServ360
Version           : WINDOWS:3.5,3.6
Issue type        : kbbug
Solution Type     : kbfix

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