here are the patches for psql on Win32:

psql4win32.patch  - changes in the psql source code
  psql-ref.patch    - changes in the documentation psql-ref.sgml
                      (for new builtin variable WIN32_CONSOLE)

To apply them use "patch -p 1" in the root directory of the
postgres source directory.

These patches fix the following problems of psql on Win32
(all changes only have effect #ifdef WIN32):

  a) Problem:  Static library libpq.a did not work
     Solution: Added WSAStartup() in fe-connect.c

  b) Problem:  Secret Password was echoed by psql
     Solution: Password echoing disabled in sprompt.c

  c) Problem:  8bit characters were displayed/interpreted wrong in psql
               This is due to the fact that the Win32 "console" uses a
               different encoding than the rest of the Windows system
     Solution: Introduced a new psql variable WIN32_CONSOLE
               When set with "\set WIN32_console", the function OemToChar()
               is applied after reading input and CharToOem() before
               displaying Output

Christoph Dalitz

src/bin/psql/mbprint.c

@@ -3,7 +3,7 @@
  *
  * Copyright 2000 by PostgreSQL Global Development Group
  *
- * $Header: /cvsroot/pgsql/src/bin/psql/mbprint.c,v 1.6 2003/03/18 22:15:44 petere Exp $
+ * $Header: /cvsroot/pgsql/src/bin/psql/mbprint.c,v 1.7 2003/07/27 03:32:26 momjian Exp $
  */
 
 #include "postgres_fe.h"
@@ -11,6 +11,10 @@
 
 #include "mb/pg_wchar.h"
 
+#ifdef WIN32
+#include <windows.h>
+#endif
+
 /*
  * This is an implementation of wcwidth() and wcswidth() as defined in
  * "The Single UNIX Specification, Version 2, The Open Group, 1997"
@@ -330,6 +334,14 @@ mbvalidate(unsigned char *pwcs, int encoding)
 		return mb_utf_validate(pwcs);
 	else
 	{
+#ifdef WIN32
+		/*
+		 * translate characters to DOS console encoding, e.g. needed
+		 * for German umlauts
+		 */
+		if (GetVariableBool(pset.vars, "WIN32_CONSOLE"))
+			CharToOem(pwcs, pwcs);
+#endif
 		/*
 		 * other encodings needing validation should add their own
 		 * routines here