[postgis-tickets] [PostGIS] #5175: <> and != on geometry yield operator is not unique

PostGIS trac at osgeo.org
Mon Jun 27 16:57:17 PDT 2022


#5175: <> and != on geometry yield operator is not unique
---------------------+---------------------------
 Reporter:  robe     |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  medium   |  Milestone:  PostGIS 3.2.2
Component:  postgis  |    Version:  3.2.x
 Keywords:           |
---------------------+---------------------------
 Reported on IRC someone trying to create a trigger with construct:


 {{{
  (NEW.geom != OLD.geom)
 }}}

 yielded != is not unique for geometry.
 had to resort to


 {{{
  (NEW.geom::text != OLD.geom::text)
 }}}

 I verified it is an issue with


 {{{
 SELECT ST_Point(1,2) != ST_Point(3,4);
 SELECT ST_Point(1,2) <> ST_Point(3,4);
 }}}

 However this works fine:

 {{{
 SELECT ST_Point(1,2)::geography != ST_Point(3,4)::geography;
 SELECT ST_Point(1,2)::geography <> ST_Point(3,4)::geography;
 }}}

 I haven't verified where the extra operator indirection is coming from
 that is not effecting geography as well.
-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/5175>
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