diff --git a/doc/src/sgml/ref/psql-ref.sgml b/doc/src/sgml/ref/psql-ref.sgml
index 10d42ca..2e6484f 100644
--- a/doc/src/sgml/ref/psql-ref.sgml
+++ b/doc/src/sgml/ref/psql-ref.sgml
@@ -1257,6 +1257,18 @@ testdb=>
 
 
       <varlistentry>
+        <term><literal>\dw [ <replaceable class="parameter">pattern</replaceable> ]</literal></term>
+        <listitem>
+        <para>
+        Lists all windowing functions. If <replaceable
+        class="parameter">pattern</replaceable> is specified, only
+        those windowing functions whose names match the pattern are listed.
+        </para>
+        </listitem>
+      </varlistentry>
+
+
+      <varlistentry>
         <term><literal>\edit</literal> (or <literal>\e</literal>) <literal><optional> <replaceable class="parameter">filename</replaceable> </optional></literal></term>
 
         <listitem>
diff --git a/src/bin/psql/command.c b/src/bin/psql/command.c
index b39466d..b737daf 100644
--- a/src/bin/psql/command.c
+++ b/src/bin/psql/command.c
@@ -396,6 +396,9 @@ exec_command(const char *cmd,
 			case 'u':
 				success = describeRoles(pattern, show_verbose);
 				break;
+			case 'w':
+				success = describeWindowingFunctions(pattern);
+				break;
 			case 'F':			/* text search subsystem */
 				switch (cmd[2])
 				{
diff --git a/src/bin/psql/describe.c b/src/bin/psql/describe.c
index 731baf8..5699e29 100644
--- a/src/bin/psql/describe.c
+++ b/src/bin/psql/describe.c
@@ -280,6 +280,9 @@ describeFunctions(const char *pattern, bool verbose, bool showSystem)
  		appendPQExpBuffer(&buf, "      AND n.nspname <> 'pg_catalog'\n"
  								"      AND n.nspname <> 'information_schema'\n");
 
+    if (pset.sversion >= 80400)
+		appendPQExpBuffer(&buf, "      AND NOT p.proiswindow\n");
+
 	processSQLNamePattern(pset.db, &buf, pattern, true, false,
 						  "n.nspname", "p.proname", NULL,
 						  "pg_catalog.pg_function_is_visible(p.oid)");
@@ -3059,6 +3062,56 @@ listUserMappings(const char *pattern, bool verbose)
 	return true;
 }
 
+bool
+describeWindowingFunctions(const char *pattern)
+{
+	PQExpBufferData buf;
+	PGresult   *res;
+	printQueryOpt myopt = pset.popt;
+
+	if (pset.sversion < 80400)
+	{
+		fprintf(stderr, _("The server (version %d.%d) does not support windowing functions.\n"),
+				pset.sversion / 10000, (pset.sversion / 100) % 100);
+		return true;
+	}
+
+	initPQExpBuffer(&buf);
+
+	printfPQExpBuffer(&buf,
+					  "SELECT n.nspname as \"%s\",\n"
+					  "  p.proname as \"%s\",\n"
+					  "  pg_catalog.pg_get_function_result(p.oid) as \"%s\",\n"
+					  "  pg_catalog.pg_get_function_arguments(p.oid) as \"%s\""
+					  "\nFROM pg_catalog.pg_proc p"
+					  "\n     LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace\n"
+					  "WHERE p.proiswindow\n",
+					  gettext_noop("Schema"),
+					  gettext_noop("Name"),
+					  gettext_noop("Result data type"),
+					  gettext_noop("Argument data types"));
+
+	processSQLNamePattern(pset.db, &buf, pattern, true, false,
+						  "n.nspname", "p.proname", NULL,
+						  "pg_catalog.pg_function_is_visible(p.oid)");
+
+	appendPQExpBuffer(&buf, "ORDER BY 1, 2, 4;");
+
+	res = PSQLexec(buf.data, false);
+	termPQExpBuffer(&buf);
+	if (!res)
+		return false;
+
+	myopt.nullPrint = NULL;
+	myopt.title = _("List of windowing functions");
+	myopt.translate_header = true;
+
+	printQuery(res, &myopt, pset.queryFout, pset.logfile);
+
+	PQclear(res);
+	return true;
+}
+
 /*
  * printACLColumn
  *
diff --git a/src/bin/psql/describe.h b/src/bin/psql/describe.h
index 57e5c7b..3cad080 100644
--- a/src/bin/psql/describe.h
+++ b/src/bin/psql/describe.h
@@ -75,5 +75,8 @@ extern bool listForeignServers(const char *pattern, bool verbose);
 /* \deu */
 extern bool listUserMappings(const char *pattern, bool verbose);
 
+/* \dw */
+extern bool describeWindowingFunctions(const char *pattern);
+
 
 #endif   /* DESCRIBE_H */
diff --git a/src/bin/psql/help.c b/src/bin/psql/help.c
index 389feb0..494d42f 100644
--- a/src/bin/psql/help.c
+++ b/src/bin/psql/help.c
@@ -221,6 +221,7 @@ slashUsage(unsigned short int pager)
 	fprintf(output, _("  \\dT[S+] [PATTERN]      list data types\n"));
 	fprintf(output, _("  \\du     [PATTERN]      list roles (users)\n"));
 	fprintf(output, _("  \\dv[S+] [PATTERN]      list views\n"));
+	fprintf(output, _("  \\dw     [PATTERN]      list windowing functions\n"));
 	fprintf(output, _("  \\l[+]                  list all databases\n"));
 	fprintf(output, _("  \\z      [PATTERN]      same as \\dp\n"));
 	fprintf(output, "\n");