postgis.backend
Name
postgis.backend — The backend to service a function where GEOS and SFCGAL overlap. Options: geos or sfcgal. Defaults to geos.
Description
   This GUC is only relevant if you compiled PostGIS with sfcgal support.  By default
   
    geos
   
   backend is used for functions where both GEOS and SFCGAL have the same named function.  This variable allows you to override and make sfcgal the backend to service the request.
  
Availability: 2.1.0