openmaptiles/layers/housenumber/housenumber_centroid.sql

46 wiersze
1.3 KiB
PL/PgSQL

DROP TRIGGER IF EXISTS trigger_flag ON osm_housenumber_point;
DROP TRIGGER IF EXISTS trigger_refresh ON housenumber.updates;
-- etldoc: osm_housenumber_point -> osm_housenumber_point
CREATE OR REPLACE FUNCTION convert_housenumber_point() RETURNS VOID AS $$
BEGIN
UPDATE osm_housenumber_point SET geometry=ST_PointOnSurface(geometry) WHERE ST_GeometryType(geometry) <> 'ST_Point';
END;
$$ LANGUAGE plpgsql;
SELECT convert_housenumber_point();
-- Handle updates
CREATE SCHEMA IF NOT EXISTS housenumber;
CREATE TABLE IF NOT EXISTS housenumber.updates(id serial primary key, t text, unique (t));
CREATE OR REPLACE FUNCTION housenumber.flag() RETURNS trigger AS $$
BEGIN
INSERT INTO housenumber.updates(t) VALUES ('y') ON CONFLICT(t) DO NOTHING;
RETURN null;
END;
$$ language plpgsql;
CREATE OR REPLACE FUNCTION housenumber.refresh() RETURNS trigger AS
$BODY$
BEGIN
RAISE LOG 'Refresh housenumber';
PERFORM convert_housenumber_point();
DELETE FROM housenumber.updates;
RETURN null;
END;
$BODY$
language plpgsql;
CREATE TRIGGER trigger_flag
AFTER INSERT OR UPDATE OR DELETE ON osm_housenumber_point
FOR EACH STATEMENT
EXECUTE PROCEDURE housenumber.flag();
CREATE CONSTRAINT TRIGGER trigger_refresh
AFTER INSERT ON housenumber.updates
INITIALLY DEFERRED
FOR EACH ROW
EXECUTE PROCEDURE housenumber.refresh();