--- a/src-db/database/model/prescript-PostgreSql.sql	Tue Apr 26 17:15:29 2016 +0200
+++ b/src-db/database/model/prescript-PostgreSql.sql	Wed Apr 27 14:44:37 2016 +0200
@@ -261,6 +261,17 @@
 ' LANGUAGE 'plpgsql' IMMUTABLE
 /-- END
 
+CREATE OR REPLACE FUNCTION to_date
+(
+ timestamp, varchar
+)
+  RETURNS timestamp AS '
+BEGIN
+  RETURN to_timestamp(to_char($1), $2);
+END;
+' LANGUAGE 'plpgsql' IMMUTABLE
+/-- END
+
 CREATE OR REPLACE FUNCTION to_timestamp
 (
  timestamptz