[postgis-tickets] [PostGIS] #4991: st_union of single row should keep the row intact

[PostGIS]

#4991: st_union of single row should keep the row intact
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  Reporter:  michal   |      Owner:  pramsey
      Type:  defect   |     Status:  closed
  Priority:  medium   |  Milestone:  PostGIS 3.1.5
 Component:  postgis  |    Version:  3.1.x
Resolution:  invalid  |   Keywords:
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Comment (by mdavis):

 Why is the semantics of preserving a single-row input required?  Multi-row
 inputs are likely to change, in general.  Surely the logic should be able
 to handle change in the output in all cases?

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4991#comment:5>
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