openmaptiles/layers/place/update_state_point.sql

80 wiersze
2.7 KiB
PL/PgSQL

DROP TRIGGER IF EXISTS trigger_flag ON osm_state_point;
DROP TRIGGER IF EXISTS trigger_refresh ON place_state.updates;
ALTER TABLE osm_state_point DROP CONSTRAINT IF EXISTS osm_state_point_rank_constraint;
-- etldoc: ne_10m_admin_1_states_provinces -> osm_state_point
-- etldoc: osm_state_point -> osm_state_point
CREATE OR REPLACE FUNCTION update_osm_state_point() RETURNS VOID AS $$
BEGIN
WITH important_state_point AS (
SELECT osm.geometry, osm.osm_id, osm.name, COALESCE(NULLIF(osm.name_en, ''), ne.name) AS name_en, ne.scalerank, ne.labelrank, ne.datarank
FROM ne_10m_admin_1_states_provinces AS ne, osm_state_point AS osm
WHERE
-- We only match whether the point is within the Natural Earth polygon
-- because name matching is difficult
ST_Within(osm.geometry, ne.geometry)
-- We leave out leess important states
AND ne.scalerank <= 3 AND ne.labelrank <= 2
)
UPDATE osm_state_point AS osm
-- Normalize both scalerank and labelrank into a ranking system from 1 to 6.
SET "rank" = LEAST(6, CEILING((scalerank + labelrank + datarank)/3.0))
FROM important_state_point AS ne
WHERE osm.osm_id = ne.osm_id;
-- TODO: This shouldn't be necessary? The rank function makes something wrong...
UPDATE osm_state_point AS osm
SET "rank" = 1
WHERE "rank" = 0;
DELETE FROM osm_state_point WHERE "rank" IS NULL;
UPDATE osm_state_point
SET tags = update_tags(tags, geometry)
WHERE COALESCE(tags->'name:latin', tags->'name:nonlatin', tags->'name_int') IS NULL;
END;
$$ LANGUAGE plpgsql;
SELECT update_osm_state_point();
-- ALTER TABLE osm_state_point ADD CONSTRAINT osm_state_point_rank_constraint CHECK("rank" BETWEEN 1 AND 6);
CREATE INDEX IF NOT EXISTS osm_state_point_rank_idx ON osm_state_point("rank");
-- Handle updates
CREATE SCHEMA IF NOT EXISTS place_state;
CREATE TABLE IF NOT EXISTS place_state.updates(id serial primary key, t text, unique (t));
CREATE OR REPLACE FUNCTION place_state.flag() RETURNS trigger AS $$
BEGIN
INSERT INTO place_state.updates(t) VALUES ('y') ON CONFLICT(t) DO NOTHING;
RETURN null;
END;
$$ language plpgsql;
CREATE OR REPLACE FUNCTION place_state.refresh() RETURNS trigger AS
$BODY$
BEGIN
RAISE LOG 'Refresh place_state rank';
PERFORM update_osm_state_point();
DELETE FROM place_state.updates;
RETURN null;
END;
$BODY$
language plpgsql;
CREATE TRIGGER trigger_flag
AFTER INSERT OR UPDATE OR DELETE ON osm_state_point
FOR EACH STATEMENT
EXECUTE PROCEDURE place_state.flag();
CREATE CONSTRAINT TRIGGER trigger_refresh
AFTER INSERT ON place_state.updates
INITIALLY DEFERRED
FOR EACH ROW
EXECUTE PROCEDURE place_state.refresh();