On Wed, Mar 19, 2014 at 11:53:33AM +0100, Rémi Cura wrote: > Hey Dear List, > > somebody knows exactly what is the difference bteween those 2 columns in > postgis topology?
The "abs" one was just a facility to allow for the field to be a valid foreign key into edge_id. Not sure it's still needed with newer postgresql, haven't tried. Would be something like: FOREIGN KEY ( abs(next_left_edge) ) REFERENCES <toponame>.edge (edge_id); Let me know if you find anything interesting about that. Would save 2 "abs" fields per record in the edge table... --strk; _______________________________________________ postgis-users mailing list [email protected] http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users
