[postgis-tickets] [PostGIS] #4680: Implement ST_GetFaceGeometry by following rings, not face labels

[PostGIS]

#4680: Implement ST_GetFaceGeometry by following rings, not face labels
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  Reporter:  strk         |      Owner:  strk
      Type:  enhancement  |     Status:  new
  Priority:  medium       |  Milestone:  PostGIS Fund Me
 Component:  topology     |    Version:  main
Resolution:               |   Keywords:
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Comment (by strk):

 For the record: we do have some C code to build polygons under the
 lwt_Polygonize function, we could do a single database access to fetch all
 edges advertising the given face on any of their sides and do the graph
 walking in memory. Note that the direct edge linking is not always enough
 as it would build Maximal Edge Rings while we'd need a Minimal Edge Rings
 to avoid self-intersecting shells invalidities (and dangling pointers).

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4680#comment:3>
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