[postgis-devel] [PostGIS] #965: ST_AddIsoNode allows adding non-isolated nodes (nodes with containing_face=null)

[PostGIS]

#965: ST_AddIsoNode allows adding non-isolated nodes (nodes with
containing_face=null)
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 Reporter:  strk      |       Owner:  strk         
     Type:  defect    |      Status:  new          
 Priority:  medium    |   Milestone:  PostGIS 2.0.0
Component:  topology  |     Version:  trunk        
 Keywords:            |  
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 According to SQL/MM, the ST_AddIsoNode function allows passing 'null' as
 the "containing face". This is allowed specifically for the case in which
 an isolated node is not inside a face.

 Now, since the same document also refers to an "universal face", which has
 (again, in the spec) a special face identifier 0, I guess that's the value
 we should write in "containing_face" field of the node table, to
 distinguish the node from a non-isolated one.

 This would be pretty much equivalent to forbid passin 'null' and allow
 passing '0', but the specs are confusing on the matter.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/965>
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