/usr/share/postgres-xc/extension/earthdistance--unpackaged--1.0.sql is in postgres-xc-contrib 1.1-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | /* contrib/earthdistance/earthdistance--unpackaged--1.0.sql */
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION earthdistance" to load this file. \quit
ALTER EXTENSION earthdistance ADD function earth();
ALTER EXTENSION earthdistance ADD type earth;
ALTER EXTENSION earthdistance ADD function sec_to_gc(double precision);
ALTER EXTENSION earthdistance ADD function gc_to_sec(double precision);
ALTER EXTENSION earthdistance ADD function ll_to_earth(double precision,double precision);
ALTER EXTENSION earthdistance ADD function latitude(earth);
ALTER EXTENSION earthdistance ADD function longitude(earth);
ALTER EXTENSION earthdistance ADD function earth_distance(earth,earth);
ALTER EXTENSION earthdistance ADD function earth_box(earth,double precision);
ALTER EXTENSION earthdistance ADD function geo_distance(point,point);
ALTER EXTENSION earthdistance ADD operator <@>(point,point);
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