Using PostGIS I'm trying to transform a point coordinate from EPSG:31468 to EPSG:4326 using a proj4-string that I obtained from QGIS "Select Datum Transform" (is it one?):
SQL is of the form geometry ST_Transform(geometry geom, text to_proj);
:
SELECT(ST_AsText(ST_Transform(ST_SetSRID(ST_Point(4482649, 5485174), 31468), '+proj=pipeline +step +inv +proj=tmerc +lat_0=0 +lon_0=12 +k=1 +x_0=4500000 +y_0=0 +ellps=bessel +step +proj=hgridshift +grids=BETA2007.gsb +step +proj=unitconvert +xy_in=rad +xy_out=deg')));
As the result I'getting this error:
ERROR: transform_geom: couldn't parse proj4 output string: '+proj=pipeline +step +inv +proj=tmerc +lat_0=0 +lon_0=12 +k=1 +x_0=4500000 +y_0=0 +ellps=bessel +step +proj=hgridshift +grids=BETA2007.gsb +step +proj=unitconvert +xy_in=rad +xy_out=deg': unknown projection id
CONTEXT: SQL function "st_transform" statement 1
What's probably wrong here?