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robertmhaasrobertmhaas
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Update earthdistance extension for parallel query.
All functions provided by this extension are PARALLEL SAFE. Andreas Karlsson
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‎contrib/earthdistance/Makefile

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MODULES = earthdistance
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EXTENSION = earthdistance
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DATA = earthdistance--1.0.sql earthdistance--unpackaged--1.0.sql
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DATA = earthdistance--1.1.sql earthdistance--1.0--1.1.sql \
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earthdistance--unpackaged--1.0.sql
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PGFILEDESC = "earthdistance - calculate distances on the surface of the Earth"
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REGRESS = earthdistance

‎contrib/earthdistance/earthdistance--1.0--1.1.sql

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/* contrib/earthdistance/earthdistance--1.0--1.1.sql */
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-- complain if script is sourced in psql, rather than via ALTER EXTENSION
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\echo Use "ALTER EXTENSION earthdistance UPDATE TO '1.1'" to load this file. \quit
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ALTER FUNCTION earth() PARALLEL SAFE;
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ALTER FUNCTION sec_to_gc(float8) PARALLEL SAFE;
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ALTER FUNCTION gc_to_sec(float8) PARALLEL SAFE;
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ALTER FUNCTION ll_to_earth(float8, float8) PARALLEL SAFE;
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ALTER FUNCTION latitude(earth) PARALLEL SAFE;
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ALTER FUNCTION longitude(earth) PARALLEL SAFE;
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ALTER FUNCTION earth_distance(earth, earth) PARALLEL SAFE;
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ALTER FUNCTION earth_box(earth, float8) PARALLEL SAFE;
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ALTER FUNCTION geo_distance(point, point) PARALLEL SAFE;

‎contrib/earthdistance/earthdistance--1.0.sql renamed to ‎contrib/earthdistance/earthdistance--1.1.sql

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/* contrib/earthdistance/earthdistance--1.0.sql */
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/* contrib/earthdistance/earthdistance--1.1.sql */
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-- complain if script is sourced in psql, rather than via CREATE EXTENSION
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\echo Use "CREATE EXTENSION earthdistance" to load this file. \quit
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-- in order to use different units (or a better value for the Earth's radius).
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CREATE FUNCTION earth() RETURNS float8
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LANGUAGE SQL IMMUTABLE
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LANGUAGE SQL IMMUTABLE PARALLEL SAFE
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AS 'SELECT ''6378168''::float8';
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-- Astromers may want to change the earth function so that distances will be
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RETURNS float8
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LANGUAGE SQL
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IMMUTABLE STRICT
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PARALLEL SAFE
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AS 'SELECT CASE WHEN $1 < 0 THEN 0::float8 WHEN $1/(2*earth()) > 1 THEN pi()*earth() ELSE 2*earth()*asin($1/(2*earth())) END';
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CREATE FUNCTION gc_to_sec(float8)
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RETURNS float8
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LANGUAGE SQL
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IMMUTABLE STRICT
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PARALLEL SAFE
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AS 'SELECT CASE WHEN $1 < 0 THEN 0::float8 WHEN $1/earth() > pi() THEN 2*earth() ELSE 2*earth()*sin($1/(2*earth())) END';
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CREATE FUNCTION ll_to_earth(float8, float8)
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RETURNS earth
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LANGUAGE SQL
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IMMUTABLE STRICT
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PARALLEL SAFE
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AS 'SELECT cube(cube(cube(earth()*cos(radians($1))*cos(radians($2))),earth()*cos(radians($1))*sin(radians($2))),earth()*sin(radians($1)))::earth';
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CREATE FUNCTION latitude(earth)
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RETURNS float8
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LANGUAGE SQL
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IMMUTABLE STRICT
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PARALLEL SAFE
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AS 'SELECT CASE WHEN cube_ll_coord($1, 3)/earth() < -1 THEN -90::float8 WHEN cube_ll_coord($1, 3)/earth() > 1 THEN 90::float8 ELSE degrees(asin(cube_ll_coord($1, 3)/earth())) END';
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CREATE FUNCTION longitude(earth)
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RETURNS float8
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LANGUAGE SQL
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IMMUTABLE STRICT
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PARALLEL SAFE
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AS 'SELECT degrees(atan2(cube_ll_coord($1, 2), cube_ll_coord($1, 1)))';
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CREATE FUNCTION earth_distance(earth, earth)
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RETURNS float8
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LANGUAGE SQL
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IMMUTABLE STRICT
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PARALLEL SAFE
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AS 'SELECT sec_to_gc(cube_distance($1, $2))';
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CREATE FUNCTION earth_box(earth, float8)
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RETURNS cube
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LANGUAGE SQL
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IMMUTABLE STRICT
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PARALLEL SAFE
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AS 'SELECT cube_enlarge($1, gc_to_sec($2), 3)';
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--------------- geo_distance
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CREATE FUNCTION geo_distance (point, point)
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RETURNS float8
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LANGUAGE C IMMUTABLE STRICT AS 'MODULE_PATHNAME';
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LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE AS 'MODULE_PATHNAME';
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--------------- geo_distance as operator <@>
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‎contrib/earthdistance/earthdistance.control

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# earthdistance extension
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comment = 'calculate great-circle distances on the surface of the Earth'
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default_version = '1.0'
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default_version = '1.1'
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module_pathname = '$libdir/earthdistance'
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relocatable = true
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requires = 'cube'

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