[postgis-tickets] [PostGIS] #3777: POINT EMPTY, POINT 0 0 anomaly

[PostGIS]

#3777: POINT EMPTY, POINT 0 0 anomaly
----------------------+---------------------------
  Reporter:  robe     |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 2.3.3
 Component:  postgis  |    Version:  2.3.x
Resolution:           |   Keywords:
----------------------+---------------------------

Comment (by robe):

 We must have had this problem for sometime.  PostGIS 1.5.5 is doing
 something different as well when change order of items.  Check this out:


 {{{
 SELECT ST_AsText(geom) txt
 FROM (
 SELECT 'GEOMETRYCOLLECTION EMPTY'::geometry geom
 UNION
 SELECT 'POINT EMPTY'::geometry geom
 UNION
 SELECT 'POINT(0 0)'::geometry geom
 UNION
 SELECT 'POINT(0 0)'::geometry geom
 UNION
 SELECT 'POINT(0 0)'::geometry geom
 UNION
 SELECT 'POINT(0 1)'::geometry geom
 UNION
 SELECT 'LINESTRING(0 0,0 1)'::geometry geom

 ) foo;
 }}}


 In 2.3.2 and 2.4.0dev


 {{{
            txt
 --------------------------
  POINT(0 0)
  GEOMETRYCOLLECTION EMPTY
  POINT(0 0)
  POINT EMPTY
  POINT(0 0)
  LINESTRING(0 0,0 1)
  POINT(0 1)
 (7 rows)
 }}}

 In 1.5.5

 {{{
          txt
 ---------------------
  POINT(0 0)
  LINESTRING(0 0,0 1)
  POINT(0 1)
 (3 rows)
 }}}

--
Ticket URL: <https://trac.osgeo.org/postgis/ticket/3777#comment:6>
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