[postgis-tickets] [PostGIS] #4943: st_equals fails on invalid geometry with GEOS error

[PostGIS]

#4943: st_equals fails on invalid geometry with GEOS error
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  Reporter:  mschott  |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.1.3
 Component:  postgis  |    Version:  3.1.x
Resolution:           |   Keywords:  st_equals, GEOS, invalid
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Comment (by mdavis):

 Yes, the doc appears to be aspirational rather than accurate.  It would be
 nice if `ST_Equals` did not error out on invalid geometry.  That will
 require a fix in GEOS.

 In this case one geometry is valid, and one is invalid, so clearly they
 are not equal. You could test for this condition before running
 `ST_Equals`.

 Another alternative is to run `ST_Normalize` on each snapped input, and
 then use `ST_OrderingEquals`.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4943#comment:2>
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