[postgis-tickets] [PostGIS] #4776: st_geometrytype causes 100% CPU loop in postgres13 on specific linestring

[PostGIS]

#4776: st_geometrytype causes 100% CPU loop in postgres13 on specific linestring
-------------------------+---------------------------
  Reporter:  tvijlbrief  |      Owner:  pramsey
      Type:  defect      |     Status:  new
  Priority:  medium      |  Milestone:  PostGIS 3.1.0
 Component:  postgis     |    Version:  3.0.x
Resolution:              |   Keywords:
-------------------------+---------------------------

Comment (by robe):

 This might be a PostGIS 3.0 probably

 I tried on my development version PostGIS 3.1

 {{{
 POSTGIS="3.1.0dev 3.1.0alpha2-111-gd781ecf29" [EXTENSION] PGSQL="130"
 GEOS="3.9.0-CAPI-1.14.0" PROJ="6.3.2" GDAL="GDAL 3.2.0, released
 2020/10/26" LIBXML="2.9.9" LIBJSON="0.12" LIBPROTOBUF="1.2.1" WAGYU="0.5.0
 (Internal)" RASTER PostgreSQL 13.0 on x86_64-w64-mingw32, compiled by
 gcc.exe (x86_64-posix-seh-rev0, Built by MinGW-W64 project) 8.1.0, 64-bit
 }}}


 {{{
 DROP TABLE
 CREATE TABLE
 COPY 1
  st_isvalid
 ------------
  t
 (1 row)


  st_numpoints
 --------------
          1518
 (1 row)


  st_geometrytype
 -----------------
  ST_LineString
 (1 row)
 }}}


 But my PostgreSQL 13 with PostGIS 3.0 bad news - same issue


 {{{
 POSTGIS="3.0.2 3.0.2" [EXTENSION] PGSQL="130" GEOS="3.8.1-CAPI-1.13.3"
 SFCGAL="1.3.8" PROJ="6.3.2" GDAL="GDAL 3.2.0, released 2020/10/26
 GDAL_DATA not found" LIBXML="2.9.9" LIBJSON="0.12" LIBPROTOBUF="1.2.1"
 WAGYU="0.4.3 (Internal)" TOPOLOGY RASTER PostgreSQL 13.0, compiled by
 Visual C++ build 1914, 64-bit
 }}}


 Gets this far


 {{{
 DROP TABLE
 CREATE TABLE
 COPY 1
  st_isvalid
 ------------
  t
 (1 row)


  st_numpoints
 --------------
          1518
 (1 row)

 hangs
 }}}

-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/4776#comment:3>
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