Topology editing is currently supported by a partial implementation of ISO SQL/MM specification functions.
You can still use SQL UPDATE,SELECT and DELETE commands, but using SQL/MM functions will provide you with a more stable abstraction, will perform some checks and in some cases automatically update TopoGeometry composition records.
All SQL/MM functions have the ST_ prefix in addition to being installed under the topology schema as every other Topology object. Fully implemented editing functions are:
Creates a topology, just a wrapper around CreateTopology
Adds an IsolatedNode
Removes an IsolatedNode
Move an IsolatedNode in space
Adds an IsolatedEdge
Removes an IsolatedEdge
Updates the curve geometry of an Edge.
Splits an IsolatedEdge with a new Node. The old !Edge will be removed and substituted with the two new Edges resulting from the split. Any TopoGeometry object referring to the old !Edge will be updated to refer to the new Edges.
Returns a face Geometry