CREATE OR REPLACE FUNCTION cdb_dataservices_server.cdb_isochrone(username TEXT, orgname TEXT, source geometry(Geometry, 4326), mode TEXT, range integer[], options text[] DEFAULT NULL)
RETURNS Geometry AS $$
  plpy.execute("SELECT cdb_dataservices_server._connect_to_redis('{0}')".format(username))
  redis_conn = GD["redis_connection_{0}".format(username)]['redis_metrics_connection']
  plpy.execute("SELECT cdb_dataservices_server._get_routing_config({0}, {1})".format(plpy.quote_nullable(username), plpy.quote_nullable(orgname)))
  user_isolines_config = GD["user_routing_config_{0}".format(username)]
  type = 'isochrone'

  if user_isolines_config.heremaps_geocoder:
    here_plan = plpy.prepare("SELECT cdb_dataservices_server._cdb_here_routing_isolines($1, $2, $3, $4, $5, $6, $7) as isoline; ", ["text", "text", "text", "text", "geometry(Geometry, 4326)", "text", "integer[]", "text[]"])
    return plpy.execute(here_plan, [username, orgname, type, source, mode, range, options], 1)
   else:
    plpy.error('Requested routing service is not available')

$$ LANGUAGE plpythonu;