[postgis-tickets] [PostGIS] #5361: Compound Curve inconsistent behavior with ST_GeometryN, ST_NumGeometries, and ST_Dump

[PostGIS]

#5361: Compound Curve inconsistent behavior with ST_GeometryN, ST_NumGeometries,
and ST_Dump
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  Reporter:  robe     |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  low      |  Milestone:  PostGIS 3.4.0
 Component:  postgis  |    Version:  master
Resolution:           |   Keywords:
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Comment (by pramsey):

 Perhaps it is ST_GeometryN that needs the fix...

 Yes, a compoundcurve is "one thing", but it could also be considered
 "three things with some rules" (namely the endpoint-to-endpoint coordinate
 matching). Linear ring is just a linestring with an extra rule.

 So I guess it should be possible to deconstruct a CompoundCurve with
 ST_GeometryN? Certainly since we can dump it already.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5361#comment:1>
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