One thing you might be missing is that indexes are relations too. They're a bit different than heap relations (ie "tables") but they share enough structure that it's worth using the same datatypes to represent both.
-- Gregory Stark EnterpriseDB http://www.enterprisedb.com Ask me about EnterpriseDB's RemoteDBA services! ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
