Functions and triggers for state, country and city ranks

layers/place/merge_city_rank.sql

@@ -1,6 +1,10 @@
 
 CREATE EXTENSION IF NOT EXISTS unaccent;
 
+
+CREATE FUNCTION update_osm_city_point() RETURNS VOID AS $$
+BEGIN
+
   -- Clear  OSM key:rank ( https://github.com/openmaptiles/openmaptiles/issues/108 )
   -- etldoc: osm_city_point          -> osm_city_point 
   UPDATE osm_city_point AS osm  SET "rank" = NULL WHERE "rank" IS NOT NULL;
@@ -35,4 +39,43 @@ SET "rank" = CASE WHEN scalerank <= 5 THEN scalerank + 1 ELSE scalerank END
   FROM important_city_point AS ne
   WHERE osm.osm_id = ne.osm_id;
 
+END;
+$$ LANGUAGE plpgsql;
+
+SELECT update_osm_city_point();
+
 CREATE INDEX IF NOT EXISTS osm_city_point_rank_idx ON osm_city_point("rank");
+
+-- Handle updates
+
+CREATE SCHEMA place_city;
+
+CREATE TABLE IF NOT EXISTS place_city.updates(id serial primary key, t text, unique (t));
+CREATE OR REPLACE FUNCTION place_city.flag() RETURNS trigger AS $$
+BEGIN
+    INSERT INTO place_city.updates(t) VALUES ('y')  ON CONFLICT(t) DO NOTHING;
+    RETURN null;
+END;    
+$$ language plpgsql;
+
+CREATE OR REPLACE FUNCTION place_city.refresh() RETURNS trigger AS
+  $BODY$
+  BEGIN
+    RAISE LOG 'Refresh place_city rank';
+    SELECT update_osm_city_point();
+    DELETE FROM place_city.updates;
+    RETURN null;
+  END;
+  $BODY$
+language plpgsql;
+
+CREATE TRIGGER trigger_flag
+    AFTER INSERT OR UPDATE OR DELETE ON osm_city_point
+    FOR EACH STATEMENT
+    EXECUTE PROCEDURE place_city.flag();
+
+CREATE CONSTRAINT TRIGGER trigger_refresh
+    AFTER INSERT ON place_city.updates
+    INITIALLY DEFERRED
+    FOR EACH ROW
+    EXECUTE PROCEDURE place_city.refresh();

layers/place/merge_country_rank.sql

@@ -3,6 +3,9 @@ ALTER TABLE osm_country_point DROP CONSTRAINT IF EXISTS osm_country_point_rank_c
 -- etldoc: ne_10m_admin_0_countries   -> osm_country_point
 -- etldoc: osm_country_point          -> osm_country_point
 
+CREATE FUNCTION update_osm_country_point() RETURNS VOID AS $$
+BEGIN
+
   WITH important_country_point AS (
       SELECT osm.geometry, osm.osm_id, osm.name, COALESCE(NULLIF(osm.name_en, ''), ne.name) AS name_en, ne.scalerank, ne.labelrank
       FROM ne_10m_admin_0_countries AS ne, osm_country_point AS osm
@@ -30,5 +33,44 @@ UPDATE osm_country_point AS osm
   SET "rank" = 1
   WHERE "rank" = 0;
 
-ALTER TABLE osm_country_point ADD CONSTRAINT osm_country_point_rank_constraint CHECK("rank" BETWEEN 1 AND 6);
+END;
+$$ LANGUAGE plpgsql;
+
+SELECT update_osm_country_point();
+
+-- ALTER TABLE osm_country_point ADD CONSTRAINT osm_country_point_rank_constraint CHECK("rank" BETWEEN 1 AND 6);
 CREATE INDEX IF NOT EXISTS osm_country_point_rank_idx ON osm_country_point("rank");
+
+-- Handle updates
+
+CREATE SCHEMA place_country;
+
+CREATE TABLE IF NOT EXISTS place_country.updates(id serial primary key, t text, unique (t));
+CREATE OR REPLACE FUNCTION place_country.flag() RETURNS trigger AS $$
+BEGIN
+    INSERT INTO place_country.updates(t) VALUES ('y')  ON CONFLICT(t) DO NOTHING;
+    RETURN null;
+END;    
+$$ language plpgsql;
+
+CREATE OR REPLACE FUNCTION place_country.refresh() RETURNS trigger AS
+  $BODY$
+  BEGIN
+    RAISE LOG 'Refresh place_country rank';
+    SELECT update_osm_country_point();
+    DELETE FROM place_country.updates;
+    RETURN null;
+  END;
+  $BODY$
+language plpgsql;
+
+CREATE TRIGGER trigger_flag
+    AFTER INSERT OR UPDATE OR DELETE ON osm_country_point
+    FOR EACH STATEMENT
+    EXECUTE PROCEDURE place_country.flag();
+
+CREATE CONSTRAINT TRIGGER trigger_refresh
+    AFTER INSERT ON place_country.updates
+    INITIALLY DEFERRED
+    FOR EACH ROW
+    EXECUTE PROCEDURE place_country.refresh();

layers/place/merge_state_rank.sql

@@ -3,6 +3,9 @@ ALTER TABLE osm_state_point DROP CONSTRAINT IF EXISTS osm_state_point_rank_const
 -- etldoc: ne_10m_admin_1_states_provinces_shp   -> osm_state_point
 -- etldoc: osm_state_point                       -> osm_state_point
 
+CREATE 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_shp AS ne, osm_state_point AS osm
@@ -26,5 +29,44 @@ WHERE "rank" = 0;
 
   DELETE FROM osm_state_point WHERE "rank" IS NULL;
 
-ALTER TABLE osm_state_point ADD CONSTRAINT osm_state_point_rank_constraint CHECK("rank" BETWEEN 1 AND 6);
+END;
+$$ LANGUAGE plpgsql;
+
+SELECT update_osm_state_point();
+
+-- ALTER TABLE osm_state_point ADD CONSTRAINT osm_state_point_rank_constraint CHECK("rank" BETWEEN 1 AND 6);
 CREATE INDEX IF NOT EXISTS osm_state_point_rank_idx ON osm_state_point("rank");
+
+-- Handle updates
+
+CREATE SCHEMA place_state;
+
+CREATE TABLE IF NOT EXISTS place_state.updates(id serial primary key, t text, unique (t));
+CREATE OR REPLACE FUNCTION place_state.flag() RETURNS trigger AS $$
+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';
+    SELECT 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();