--- database.pgsql.orig	Mon Oct 24 13:06:58 2005
+++ database.pgsql	Mon Oct 24 13:15:54 2005
@@ -822,6 +822,19 @@
 --- Functions
 ---
 
+CREATE FUNCTION IF(bool, anyelement, anyelement) RETURNS anyelement AS '
+BEGIN
+  IF $1 THEN
+    RETURN $2;
+  END IF;
+  RETURN $3;
+END;
+' LANGUAGE 'plpgsql';
+
+CREATE FUNCTION IF(integer, anyelement, anyelement) RETURNS anyelement AS '
+  SELECT IF($1 = 0, $2, $3);
+' LANGUAGE 'sql';
+
 CREATE FUNCTION greatest(integer, integer) RETURNS integer AS '
 BEGIN
   IF $2 IS NULL THEN