[postgis-tickets] [PostGIS] #4077: st_removerepeatedpoints regression

[PostGIS]

#4077: st_removerepeatedpoints regression
---------------------+---------------------------
 Reporter:  nicklas  |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  medium   |  Milestone:  PostGIS 2.5.0
Component:  postgis  |    Version:  trunk
 Keywords:           |
---------------------+---------------------------
 Actually I am not sure it is ST_RemoveRepeatedPoints that is the problem,
 but something has happened since PostGIS 2.4.

 I have problems vatching what is actually happening.

 I am running r16554


 This query returns as expected a "MULTIPOLYGON EMPTY":

 {{{
 # select st_snaptogrid('multipolygon(((1 1, 1 2, 2 2,1 1)))'::geometry,
 10);
    st_snaptogrid
 --------------------
  010600000000000000
 (1 row)
 }}}

 And if I feed ST_RemoveRepeadedPoints with Multipolygon Empty I get, as
 expected a Multipolygon Empty back:


 {{{
 # select st_removerepeatedpoints('010600000000000000'::geometry);
  st_removerepeatedpoints
 -------------------------
  010600000000000000
 (1 row)
 }}}

 But if I feed ST_RemoveRepeatedPoints with the result from query 1
 directly it reads the geometry type from the right place:


 {{{
 # select st_removerepeatedpoints(st_snaptogrid('multipolygon(((1 1, 1 2, 2
 2,1 1)))'::geometry, 10));
 ERROR:  Unknown geometry type: 1983230296 - Invalid type

 }}}


 In Postgis 2.4.4 r16526 I get the expected Multipolygon empty back
 instead.

 Also if I change to polygon instead of multipolygon it works as expected
 also in latest trunk version:


 {{{
 # select st_removerepeatedpoints(st_snaptogrid('polygon((1 1, 1 2, 2 2,1
 1))'::geometry, 10));
  st_removerepeatedpoints
 -------------------------
  010300000000000000
 (1 row)
 }}}

-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/4077>
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