ST_RemoveIsoEdge — Removes an isolated edge and returns description of action. If the edge is not isolated, then an exception is thrown.
text ST_RemoveIsoEdge(varchar  atopology, bigint  anedge);
Removes an isolated edge and returns description of action. If the edge is not isolated, then an exception is thrown.
Availability: 1.1
            
 Questo metodo implementa la specifica SQL/MM.  SQL-MM: Topo-Geo and Topo-Net 3: Routine Details: X+1.3.3
-- Remove an isolated node with no face  --
SELECT topology.ST_RemoveIsoNode('ma_topo',  7 ) As result;
         result
-------------------------
 Isolated node 7 removed