PostGIS_LibJSON_Version — Returns the version number of the libjson-c library.
text PostGIS_LibJSON_Version();
text PostGIS_LibJSON_Version(
)
Returns the version number of the LibJSON-C library.
SELECT PostGIS_LibJSON_Version();
0.17
PostGIS_Full_Version, PostGIS_Lib_Version, PostGIS_PROJ_Version, PostGIS_GEOS_Version, PostGIS_Version