ALTER TABLE osm_park_polygon
    ADD COLUMN IF NOT EXISTS geometry_point geometry;
ALTER TABLE osm_park_polygon_gen1
    ADD COLUMN IF NOT EXISTS geometry_point geometry;
ALTER TABLE osm_park_polygon_gen2
    ADD COLUMN IF NOT EXISTS geometry_point geometry;
ALTER TABLE osm_park_polygon_gen3
    ADD COLUMN IF NOT EXISTS geometry_point geometry;
ALTER TABLE osm_park_polygon_gen4
    ADD COLUMN IF NOT EXISTS geometry_point geometry;
ALTER TABLE osm_park_polygon_gen5
    ADD COLUMN IF NOT EXISTS geometry_point geometry;
ALTER TABLE osm_park_polygon_gen6
    ADD COLUMN IF NOT EXISTS geometry_point geometry;
ALTER TABLE osm_park_polygon_gen7
    ADD COLUMN IF NOT EXISTS geometry_point geometry;
ALTER TABLE osm_park_polygon_gen8
    ADD COLUMN IF NOT EXISTS geometry_point geometry;

DROP TRIGGER IF EXISTS update_row ON osm_park_polygon;
DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen1;
DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen2;
DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen3;
DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen4;
DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen5;
DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen6;
DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen7;
DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen8;

-- etldoc:  osm_park_polygon ->  osm_park_polygon
-- etldoc:  osm_park_polygon_gen1 ->  osm_park_polygon_gen1
-- etldoc:  osm_park_polygon_gen2 ->  osm_park_polygon_gen2
-- etldoc:  osm_park_polygon_gen3 ->  osm_park_polygon_gen3
-- etldoc:  osm_park_polygon_gen4 ->  osm_park_polygon_gen4
-- etldoc:  osm_park_polygon_gen5 ->  osm_park_polygon_gen5
-- etldoc:  osm_park_polygon_gen6 ->  osm_park_polygon_gen6
-- etldoc:  osm_park_polygon_gen7 ->  osm_park_polygon_gen7
-- etldoc:  osm_park_polygon_gen8 ->  osm_park_polygon_gen8
CREATE OR REPLACE FUNCTION update_osm_park_polygon() RETURNS void AS
$$
BEGIN
    UPDATE osm_park_polygon
    SET tags           = update_tags(tags, geometry),
        geometry_point = st_centroid(geometry);

    UPDATE osm_park_polygon_gen1
    SET tags           = update_tags(tags, geometry),
        geometry_point = st_centroid(geometry);

    UPDATE osm_park_polygon_gen2
    SET tags           = update_tags(tags, geometry),
        geometry_point = st_centroid(geometry);

    UPDATE osm_park_polygon_gen3
    SET tags           = update_tags(tags, geometry),
        geometry_point = st_centroid(geometry);

    UPDATE osm_park_polygon_gen4
    SET tags           = update_tags(tags, geometry),
        geometry_point = st_centroid(geometry);

    UPDATE osm_park_polygon_gen5
    SET tags           = update_tags(tags, geometry),
        geometry_point = st_centroid(geometry);

    UPDATE osm_park_polygon_gen6
    SET tags           = update_tags(tags, geometry),
        geometry_point = st_centroid(geometry);

    UPDATE osm_park_polygon_gen7
    SET tags           = update_tags(tags, geometry),
        geometry_point = st_centroid(geometry);

    UPDATE osm_park_polygon_gen8
    SET tags           = update_tags(tags, geometry),
        geometry_point = st_centroid(geometry);

END;
$$ LANGUAGE plpgsql;

SELECT update_osm_park_polygon();
CREATE INDEX IF NOT EXISTS osm_park_polygon_point_geom_idx ON osm_park_polygon USING gist (geometry_point);
CREATE INDEX IF NOT EXISTS osm_park_polygon_gen1_point_geom_idx ON osm_park_polygon_gen1 USING gist (geometry_point);
CREATE INDEX IF NOT EXISTS osm_park_polygon_gen2_point_geom_idx ON osm_park_polygon_gen2 USING gist (geometry_point);
CREATE INDEX IF NOT EXISTS osm_park_polygon_gen3_point_geom_idx ON osm_park_polygon_gen3 USING gist (geometry_point);
CREATE INDEX IF NOT EXISTS osm_park_polygon_gen4_point_geom_idx ON osm_park_polygon_gen4 USING gist (geometry_point);
CREATE INDEX IF NOT EXISTS osm_park_polygon_gen5_point_geom_idx ON osm_park_polygon_gen5 USING gist (geometry_point);
CREATE INDEX IF NOT EXISTS osm_park_polygon_gen6_point_geom_idx ON osm_park_polygon_gen6 USING gist (geometry_point);
CREATE INDEX IF NOT EXISTS osm_park_polygon_gen7_point_geom_idx ON osm_park_polygon_gen7 USING gist (geometry_point);
CREATE INDEX IF NOT EXISTS osm_park_polygon_gen8_point_geom_idx ON osm_park_polygon_gen8 USING gist (geometry_point);


CREATE OR REPLACE FUNCTION update_osm_park_polygon_row()
    RETURNS trigger
AS
$$
BEGIN
    NEW.tags = update_tags(NEW.tags, NEW.geometry);
    NEW.geometry_point = st_centroid(NEW.geometry);
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER update_row
    BEFORE INSERT OR UPDATE
    ON osm_park_polygon
    FOR EACH ROW
EXECUTE PROCEDURE update_osm_park_polygon_row();

CREATE TRIGGER update_row
    BEFORE INSERT OR UPDATE
    ON osm_park_polygon_gen1
    FOR EACH ROW
EXECUTE PROCEDURE update_osm_park_polygon_row();

CREATE TRIGGER update_row
    BEFORE INSERT OR UPDATE
    ON osm_park_polygon_gen2
    FOR EACH ROW
EXECUTE PROCEDURE update_osm_park_polygon_row();

CREATE TRIGGER update_row
    BEFORE INSERT OR UPDATE
    ON osm_park_polygon_gen3
    FOR EACH ROW
EXECUTE PROCEDURE update_osm_park_polygon_row();

CREATE TRIGGER update_row
    BEFORE INSERT OR UPDATE
    ON osm_park_polygon_gen4
    FOR EACH ROW
EXECUTE PROCEDURE update_osm_park_polygon_row();

CREATE TRIGGER update_row
    BEFORE INSERT OR UPDATE
    ON osm_park_polygon_gen5
    FOR EACH ROW
EXECUTE PROCEDURE update_osm_park_polygon_row();

CREATE TRIGGER update_row
    BEFORE INSERT OR UPDATE
    ON osm_park_polygon_gen6
    FOR EACH ROW
EXECUTE PROCEDURE update_osm_park_polygon_row();

CREATE TRIGGER update_row
    BEFORE INSERT OR UPDATE
    ON osm_park_polygon_gen7
    FOR EACH ROW
EXECUTE PROCEDURE update_osm_park_polygon_row();

CREATE TRIGGER update_row
    BEFORE INSERT OR UPDATE
    ON osm_park_polygon_gen8
    FOR EACH ROW
EXECUTE PROCEDURE update_osm_park_polygon_row();