ST_RemEdgeNewFace
Name
ST_RemEdgeNewFace — Removes an edge and, if the removed edge separated two faces, delete the original faces and replace them with a new face.
Synopsis
integer
ST_RemEdgeNewFace
(
varchar
atopology
, integer
anedge
)
;
Description
Removes an edge and, if the removed edge separated two faces, delete the original faces and replace them with a new face.
Returns the id of a newly created face or NULL, if no new face is created. No new face is created when the removed edge is dangling or isolated or confined with the universe face (possibly making the universe flood into the face on the other side).
Updates all existing joined edges and relationships accordingly.
Refuses to remove an edge partecipating in the definition of an existing TopoGeometry. Refuses to heal two faces if any TopoGeometry is defined by only one of them (and not the other).
If any arguments are null, the given edge is unknown (must already exist in
the
edge
table of the topology schema), the topology
name is invalid then an error is thrown.
Availability: 2.0
This method implements the SQL/MM specification. SQL-MM: Topo-Geo and Topo-Net 3: Routine Details: X.3.14