[postgis-users] Trigger updata lines

[Broun Uganda]

I want to create a trigger that updates lines' geometry depending on the position of 2 points (from_node & to_node). If i move  a point connecting two or more lines, the ends of lines should also move and follow the point. I wrote the following trigger but it gives me error that am giving multiple geometry.
 
CREATE OR REPLACE FUNCTION update_links() RETURNS "trigger"    AS 'DECLAREstarts character varying;ends character varying;BEGINstarts = NEW.name WHERE nodes.name = links.from_node;ends = NEW.name WHERE nodes.name = links.to_node;UPDATE links SET the_geom = GeometryFromtext(starts.the_geom,ends.the_geom) ;RETURN NEW;END'    LANGUAGE plpgsql;
CREATE TRIGGER update_links_update  AFTER UPDATE  ON nodes  FOR EACH ROW  EXECUTE PROCEDURE update_links();
 
 
Thanks for your help
Broun Emmanuel
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