[PostGIS] #5478: ST_GeometryN should thrown an error when requesting the 0th geometry

[PostGIS]

#5478: ST_GeometryN should thrown an error when requesting the 0th geometry
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  Reporter:  jgh          |      Owner:  pramsey
      Type:  enhancement  |     Status:  new
  Priority:  low          |  Milestone:  PostGIS 3.5.0
 Component:  postgis      |    Version:  3.3.x
Resolution:               |   Keywords:
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Comment (by pramsey):

 In general we have found that less "exception throwy" approaches are more
 beloved than approaches that stop the flow of the SQL statement. The issue
 being that the whole SQL statement stops, and you have no idea what
 particular issue stopped it. So exception throwy things tend to be hostile
 to end users.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5478#comment:2>
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