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

doc/src/sgml/ref/psql-ref.sgml

@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.91 2003/07/23 15:05:42 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.92 2003/07/27 03:32:26 momjian Exp $
 PostgreSQL documentation
 -->
 
@@ -2076,6 +2076,19 @@ bar
 	</listitem>
       </varlistentry>
 
+      <varlistentry>
+        <term><varname>WIN32_CONSOLE</varname></term>
+	<listitem>
+	<para>
+        This variable is only useful when working under the Win32 command
+        console. As the Win32 command console uses a different encoding than
+        the rest of the Windows system.  Eight-bit characters (e.g. German Umlauts)
+        are corrupted. When this variable is set the command console encoding will
+        be translated into ASCII encoding for input and output. 
+	</para>
+	</listitem>
+      </varlistentry>
+
     </variablelist>
 
    </refsect3>

src/bin/psql/describe.c

@@ -3,7 +3,7 @@
  *
  * Copyright 2000-2002 by PostgreSQL Global Development Group
  *
- * $Header: /cvsroot/pgsql/src/bin/psql/describe.c,v 1.80 2003/07/25 21:42:26 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/bin/psql/describe.c,v 1.81 2003/07/27 03:32:26 momjian Exp $
  */
 #include "postgres_fe.h"
 #include "describe.h"
@@ -18,6 +18,16 @@
 
 #include <ctype.h>
 
+#ifdef WIN32
+/*
+ * mbvalidate() is used in function describeOneTableDetails() to make sure
+ * all characters of the cells will be printed to the DOS console in a
+ * correct way
+ */
+#include "mbprint.h"
+#endif
+
+
 #define _(x) gettext((x))
 
 static bool describeOneTableDetails(const char *schemaname,
@@ -754,11 +764,20 @@ describeOneTableDetails(const char *schemaname,
 	for (i = 0; i < numrows; i++)
 	{
 		/* Name */
+#ifdef WIN32
+		cells[i * cols + 0] = mbvalidate(PQgetvalue(res, i, 0)); 
+#else
 		cells[i * cols + 0] = PQgetvalue(res, i, 0);	/* don't free this
 														 * afterwards */
+#endif
+
 		/* Type */
+#ifdef WIN32
+		cells[i * cols + 1] = mbvalidate(PQgetvalue(res, i, 1));
+#else
 		cells[i * cols + 1] = PQgetvalue(res, i, 1);	/* don't free this
 														 * either */
+#endif
 
 		/* Extra: not null and default */
 		if (show_modifiers)
@@ -777,12 +796,20 @@ describeOneTableDetails(const char *schemaname,
 								  PQgetvalue(res, i, 2));
 			}
 
+#ifdef WIN32
+			cells[i * cols + 2] = xstrdup(mbvalidate(tmpbuf.data));
+#else
 			cells[i * cols + 2] = xstrdup(tmpbuf.data);
+#endif
 		}
 
 		/* Description */
 		if (verbose)
+#ifdef WIN32
+			cells[i * cols + cols - 1] = mbvalidate(PQgetvalue(res, i, 5));
+#else
 			cells[i * cols + cols - 1] = PQgetvalue(res, i, 5);
+#endif
 	}
 
 	/* Make title */

src/bin/psql/input.c

@@ -3,13 +3,17 @@
  *
  * Copyright 2000 by PostgreSQL Global Development Group
  *
- * $Header: /cvsroot/pgsql/src/bin/psql/input.c,v 1.25 2003/07/25 19:27:06 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/bin/psql/input.c,v 1.26 2003/07/27 03:32:26 momjian Exp $
  */
 #include "postgres_fe.h"
 #include "input.h"
 
 #include <errno.h>
 
+#ifdef WIN32
+#include <windows.h>
+#endif
+
 #include "pqexpbuffer.h"
 #include "settings.h"
 #include "tab-complete.h"
@@ -42,6 +46,15 @@ static void finishInput(int, void *);
 #define PSQLHISTORY	".psql_history"
 
 
+#ifdef WIN32
+	/*
+	 * translate DOS console character set into ANSI, needed e.g. for
+	 * German umlauts
+	 */
+	if (GetVariableBool(pset.vars, "WIN32_CONSOLE"))
+		OemToChar(s, s);
+#endif
+
 #ifdef USE_READLINE
 static enum histcontrol
 GetHistControlConfig(void)

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

src/bin/psql/sprompt.c

@@ -3,7 +3,7 @@
  *
  * Copyright 2000 by PostgreSQL Global Development Group
  *
- * $Header: /cvsroot/pgsql/src/bin/psql/Attic/sprompt.c,v 1.4 2003/03/18 22:09:37 petere Exp $
+ * $Header: /cvsroot/pgsql/src/bin/psql/Attic/sprompt.c,v 1.5 2003/07/27 03:32:26 momjian Exp $
  */
 
 
@@ -26,6 +26,10 @@
 
 #ifdef HAVE_TERMIOS_H
 #include <termios.h>
+#else
+#ifdef WIN32
+#include <windows.h>
+#endif
 #endif
 
 bool		prompt_state = false;
@@ -42,6 +46,11 @@ simple_prompt(const char *prompt, int maxlen, bool echo)
 #ifdef HAVE_TERMIOS_H
 	struct termios t_orig,
 				t;
+#else
+#ifdef WIN32
+	HANDLE t;
+	LPDWORD t_orig;
+#endif
 #endif
 
 	destination = (char *) malloc(maxlen + 1);
@@ -74,6 +83,21 @@ simple_prompt(const char *prompt, int maxlen, bool echo)
 		t.c_lflag &= ~ECHO;
 		tcsetattr(fileno(termin), TCSAFLUSH, &t);
 	}
+#else
+#ifdef WIN32
+	if (!echo)
+	{
+		/* get a new handle to turn echo off */
+		t_orig=(LPDWORD)malloc(sizeof(DWORD));
+		t=GetStdHandle(STD_INPUT_HANDLE);
+
+		/* save the old configuration first */
+		GetConsoleMode(t, t_orig);
+
+		/* set to the new mode */
+		SetConsoleMode(t, ENABLE_LINE_INPUT|ENABLE_PROCESSED_INPUT);
+	}
+#endif
 #endif
 
 	if (prompt)
@@ -111,6 +135,17 @@ simple_prompt(const char *prompt, int maxlen, bool echo)
 		fputs("\n", termout);
 		fflush(termout);
 	}
+#else
+#ifdef WIN32
+	if (!echo)
+	{
+		/* reset to the original console mode */
+		SetConsoleMode(t, *t_orig);
+		fputs("\n", termout);
+		fflush(termout);
+		free(t_orig);
+	}
+#endif
 #endif
 
 	if (termin != stdin)

src/interfaces/libpq/fe-connect.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.254 2003/07/26 13:50:02 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.255 2003/07/27 03:32:26 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1970,9 +1970,25 @@ makeEmptyPGconn(void)
 {
 	PGconn	   *conn = (PGconn *) malloc(sizeof(PGconn));
 
+/* needed to use the static libpq under windows as well */
+#ifdef WIN32
+	WSADATA wsaData;
+#endif
+
 	if (conn == NULL)
 		return conn;
 
+#ifdef WIN32
+	if (WSAStartup(MAKEWORD(1, 1), &wsaData))
+	{
+		free(conn);
+		return (PGconn*) NULL; 
+	}
+
+	WSASetLastError(0);
+
+#endif
+
 	/* Zero all pointers and booleans */
 	MemSet((char *) conn, 0, sizeof(PGconn));