[PostGIS] #5663: ST_GeometryN cannot access sections of CompoundCurve

[PostGIS]

#5663: ST_GeometryN cannot access sections of CompoundCurve
----------------------+---------------------------
  Reporter:  dbaston  |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.4.3
 Component:  postgis  |    Version:  3.4.x
Resolution:           |   Keywords:
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Comment (by dbaston):

 > ST_NumCurves(linestring) should be 1

 `NumCurves` is actually more like `NumSegments`. Here are some examples
 from MS SQL (which I assume is following ISO)

 {{{
 "SELECT geometry::Parse('LINESTRING (0 0, 1 1, 2 2)').STNumCurves()"


 -----------
           2

 }}}

 {{{
 "SELECT geometry::Parse('CIRCULARSTRING (0 0, 1 1, 2 2)').STNumCurves()"


 -----------
           1

 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5663#comment:8>
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