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