[PostGIS] #5914: Raster function ST_Resample may enter an infinite loop for certain inputs

PostGIS trac at osgeo.org
Wed May 28 18:56:05 PDT 2025


#5914: Raster function ST_Resample may enter an infinite loop for certain inputs
-------------------------+---------------------------
 Reporter:  dmyzl        |      Owner:  robe
     Type:  defect       |     Status:  new
 Priority:  medium       |  Milestone:  PostGIS 3.5.4
Component:  raster       |    Version:  3.5.x
 Keywords:  ST_Resample  |
-------------------------+---------------------------
 Executing the following SQL with `ST_RESAMPLE` causes PostgreSQL to enter
 an extremely long loop — it has been running for over 17 hours without
 producing any result:

 {{{
 select ST_RESAMPLE(
 ST_RastFromHexWKB('01000003009A9999999999A93F9A9999999999A9BF000000E02B274A4100000000771956410000000000000000000000000000000000000000050005000400FDFEFDFEFEFDFEFEFDF9FAFEFEFCF9FBFDFEFEFDFCFAFEFEFE04004E627AADD16076B4F9FE6370A9F5FE59637AB0E54F58617087040046566487A1506CA2E3FA5A6CAFFBFE4D566DA4CB3E454C5665')
     ,1,1,1,1,1,1,'NearestNeighbour',1
 );
 }}}

 Unfortunately, I only have the WKB data, the original WKT representation
 has been lost.

 postgis_full_version:

 {{{
 POSTGIS="3.5.3 0" [EXTENSION] PGSQL="170" GEOS="3.13.1-CAPI-1.19.2"
 SFCGAL="SFCGAL 1.5.0, CGAL 5.6, BOOST 1.74.0" PROJ="9.3.1
 NETWORK_ENABLED=OFF URL_ENDPOINT=https://cdn.proj.org
 USER_WRITABLE_DIRECTORY=/home/yzl/.local/share/proj
 DATABASE_PATH=/home/yzl/project/build_pg_postgis/proj-9.3.1/tmp_install/share/proj/proj.db"
 (compiled against PROJ 9.3.1) GDAL="GDAL 3.7.2, released 2023/09/05"
 LIBXML="2.9.13" LIBJSON="0.17" LIBPROTOBUF="1.3.3" WAGYU="0.5.0
 (Internal)" (core procs from "3.5.2 dea6d0a" need upgrade) TOPOLOGY
 (topology procs from "3.5.2 dea6d0a" need upgrade) RASTER (raster procs
 from "3.5.2 dea6d0a" need upgrade) (sfcgal procs from "3.5.2 dea6d0a" need
 upgrade)
 }}}
-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/5914>
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