[postgis-tickets] [PostGIS] #4884: toTopoGeom does NOT correctly set sign of element_id for linear TopoGeometry objects

[PostGIS]

#4884: toTopoGeom does NOT correctly set sign of element_id for linear
TopoGeometry objects
----------------------+---------------------------
 Reporter:  strk      |      Owner:  strk
     Type:  defect    |     Status:  new
 Priority:  medium    |  Milestone:  PostGIS 3.1.2
Component:  topology  |    Version:  1.5.X
 Keywords:            |
----------------------+---------------------------
 With POSTGIS="3.2.0dev 3.1.0rc1-113-gd758f5025":
 {{{
 strk=# select createtopology('t2');
  createtopology
 ----------------
               5
 (1 row)

 strk=# create table t2.l(id int);
 CREATE TABLE
 strk=# select addtopogeometrycolumn('t2','t2','l','g','line');
  addtopogeometrycolumn
 -----------------------
                      1
 (1 row)

 strk=# insert into t2.l(g) select toTopoGeom('LINESTRING(0 0, 10
 0)'::geometry, 't2', 1, 0);
 INSERT 0 1
 strk=# insert into t2.l(g) select toTopoGeom('LINESTRING(10 0, 0
 0)'::geometry, 't2', 1, 0);
 INSERT 0 1
 strk=# select * from t2.relation;
  topogeo_id | layer_id | element_id | element_type
 ------------+----------+------------+--------------
           1 |        1 |          1 |            2
           2 |        1 |          1 |            2
 (2 rows)

 }}}

 See also #4881 for how sign of element_id is not considered in output
 either

 This bug/limitation is probably as old as PostGIS Topology.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4884>
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