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