

        +==========================================================+
        |                                                          |
        |              ODBC extension for Win32 Perl               |
        |                                                          |
        |                     ODBC.PM package                      |
        |                                                          |
        |              -----------------------------               |
        |                                                          |
        |              by Dave Roth <rothd@roth.net>               |
        |                                                          |
        |                                                          |
        |  Copyright (c) 1996-1997 Dave Roth. All rights reserved. |
        |   This program is free software; you can redistribute    |
        | it and/or modify it under the same terms as Perl itself. |
        |                                                          |
        +==========================================================+


          based on original code by Dan DeMaggio <dmag@umich.edu>

 Use under GNU General Public License or Larry Wall's "Artistic License"


    ---------------------------------------------------------------------
        CHECK OUT THE FAQ!!! HTTP://WWW.ROTH.NET/ODBC/ODBCFAQ.HTM
    ---------------------------------------------------------------------

 This is a hack of Dan DeMaggio's <dmag@umich.edu> NTXS.C ODBC implimentation.
 I have recoded and restructered most of it including most of the ODBC.PM
 package but its very core is still based on Dan's code (thanks Dan!).


ODBC.PM HISTORY:
---------------
96.04.07 Joseph L. Casadonte Jr. <joc@netaxs.com>
         -Modified Data() to accept multiple field names
          and return an array or scalar.
         -Confirm Win95 compliance.
         -Various bug fixes.
96.04.10 Dave Roth <rothd@roth.net>
         -Fixed the RowCount() to default to the current connection.
96.04.15 Dave Roth <rothd@roth.net>		
		 -Changed version numbers to a date format.
96.05.07 Dave Roth <rothd@roth.net>
         -Fixed Data(): If returning an array, the array consisted of
          the requested fieldnames + the values. Now only returns the
          values. Thanks to Dan Westerlund <westerlund@dkraft.se>!
96.05.11 Dave Roth <rothd@roth.net>
		 -Corrected SetStmtCloseType(): it was using the CloseType as
		  if it was a ConnectionNumber instead.
96.07.22 Brian Dunfordshore <Brian_Dunfordshore@bridge.com>
         -Added MoreResults().
96.10.17 Dave Roth <rothd@roth.net>
         -Added support for new functions in ODBC.PLL (see below)
96.10.18 Dave Roth <rothd@roth.net>
         -Corrected the calls to GetData().
         -Added a "dirty" flag so Data() and DataHash() know whether or not
          to go to ODBCGetData() or use the namespace for field data.
96.10.25 Dave Roth <rothd@roth.net>
         -Added ODBC:: reference. Now you can access constants by ODBC::xxx.
96.10.26 Jutta M. Klebe <jmk@exc.bybyte.de>
         -The Dirty flag was not reset in Data() & DataHash().
97.01.04 Dave Roth <rothd@roth.net>
		 - Durring the closing of the module it calls new function ODBCShutDown().
97.02.08 Dave Roth <rothd@roth.net>
         - Corrected Error reporting bug.

99.09.25 Gurusamy Sarathy <gsar@activestate.com>
	 - DumpData() typo fix from Rex Livingston <Rex.Livingston@praxa.com.au>
	 - s/sql/Sql/; a minor efficiency improvement
	 - some minor tweaks for compatibility with Perl 5.005xx
	 - html -> pod documentation from David Rosinger <dsrosing@ingr.com>
	 - added ODBC_{ADD,REMOVE,CONFIG}_SYS_DSN constants for working with
	   system DSNs (from Stergios Marinopoulos <stergios@onward-net.com>)
	 - minor cosmetic edits to Constant.cpp for portability


ODBC.PLL HISTORY:
----------------
96.04.10 Dave Roth <rothd@roth.net>
         -Fixed a "memory bug": we were using SQL_CLOSE when closing
          an ODBC statement. This kept the cursor alive in memory so
          it can be cached in the event the same SQL statement is issued.
          We are now using SQL_DROP. This may lessen speed if the same
          SQL statements are issued again and again per connection.
         -Cleaned up some code.
96.04.12 Dave Roth <rothd@roth.net>
         -Added G/SetStmtCloseType() functions.
         -Added some constants.
96.04.13 ** We now are trying to include a version for builds up to and
		 including 105 and another for builds 106 and greater (for now).
96.04.15 Jutta M. Klebe <jmk@exc.bybyte.de>
         -Fix Bug in ODBCFetchRow(): when retrieving a field with a NULL 
          value the value from the previous field was reported.
		 -Changed version numbers to a date format.
96.04.22 Jutta M. Klebe <jmk@exc.bybyte.de>
         -Fix the SDWORD wrap-around bug in ODBCFetchRow(): when a column of
		  size  2147483647 adding 1 (for a NULL byte in szBuf) yields
		  (-2147483648) (not easy to "net UCHAR (-2147483648)"!!)
96.04.22 Dave Roth <rothd@roth.net>
		 -Inspired by Jutta, I have increased the max limit for SetMaxBufSize()
		  to 2,147,483,647 bytes.
96.05.03 Dave Roth <rothd@roth.net>
		 -Set the lowest allocated char array to be 20 bytes in ODBCFetchRow().
		  Evidentally sometimes the ODBC manager will report too few chars 
		  that are needed to represent an autonumber field.
96.05.08 Dave Roth <rothd@roth.net>
		 -Convert all results from ODBCTableList() to uppercase since different
		  ODBC drivers impliment this differently (some uppercase some lower).
		  Thanks again to Jutta M. Klebe <jmk@exc.bybyte.de>
		  *** This patch is open for suggestions!!! ***
96.05.13 Mike Knister <knister@sierra.net>
         -Change SQL_COLUMN_LENGTH to SQL_COLUMN_DISPLAY_SIZE in the
          SQLColAttributes() line withing ODBC_Fetch(). This was returning the
          number of bytes needed to represent the C data type for the
          particular column. We need it to return the number of bytes needed
          to represent an ASCII version of the value held within the data type.
96.07.22 Brian Dunfordshore <Brian_Dunfordshore@bridge.com>
         -Added ODBCMoreResults().
96.10.17 Dave Roth <rothd@roth.net>
    Modified:
         - Fetch() is now based on both SQLFetch() and SQLExtendedFetch().
         - Error() now works correctly.
         - new() now lets you specify ConnectOptions to impliment before
           the actual connection is made.
    Added:
         - ConfigDSN()
         - SetStmtOption()
         - DataSources()
         - Debug()
         - DropCursor()
         - GetConnectOption()
         - GetCursorName()
         - GetData()
         - GetDSN()
         - GetFunctions()
         - GetInfo()
         - GetStmtOption()
         - SetConnectOption()
         - SetCursorName()
         - SetPos()
         - SetStmtOption()
         - Transact()
         - Support for all ODBC/SQL constants.
96.10.26 Jutta M. Klebe <jmk@exc.bybyte.de>
		 - Correct GetData() returning NULL values (again).
97.01.04 Dave Roth <rothd@roth.net>
		 - Now using a Multi-threading aware OOP model.
		 - Optimized some functions.
		 - Added:
		   ODBCClone		
		   ODBCGetSQLState
		   ODBCGetStats	
		   ODBCShutDown() -- for correct memory deallocation when used with
		                     perlis.dll (win32 platform). 
97.02.08 Dave Roth <rothd@roth.net>
		 - Fixed Error reporting which broke a version or two ago.
		 - Fixed (hopefully) the nasty binary NULL bug returning char#255's.
		 - Removed non-necessary debugging routines for release versions.
		 - Consolidated Get/SetSmtpOptions into one routine.







        
