Change SELECT to PERFORM in function and drop triggers first

layers/place/island_polygon_update.sql

@@ -1,3 +1,6 @@
+DROP TRIGGER IF EXISTS trigger_flag ON osm_island_polygon;
+DROP TRIGGER IF EXISTS trigger_refresh ON place_island.updates;
+
 -- etldoc:  osm_island_polygon ->  osm_island_polygon
 CREATE OR REPLACE FUNCTION convert_island_polygon_point() RETURNS VOID AS $$
 BEGIN
@@ -24,16 +27,13 @@ CREATE OR REPLACE FUNCTION place_island.refresh() RETURNS trigger AS
   $BODY$
   BEGIN
     RAISE LOG 'Refresh place_island';
-    SELECT convert_island_polygon_point();
+    PERFORM convert_island_polygon_point();
     DELETE FROM place_island.updates;
     RETURN null;
   END;
   $BODY$
 language plpgsql;
 
-DROP TRIGGER IF EXISTS trigger_flag ON osm_island_polygon;
-DROP TRIGGER IF EXISTS trigger_refresh ON place_island.updates;
-
 CREATE TRIGGER trigger_flag
     AFTER INSERT OR UPDATE OR DELETE ON osm_island_polygon
     FOR EACH STATEMENT

layers/place/merge_city_rank.sql

@@ -1,7 +1,8 @@
+DROP TRIGGER IF EXISTS trigger_flag ON osm_city_point;
+DROP TRIGGER IF EXISTS trigger_refresh ON place_city.updates;
 
 CREATE EXTENSION IF NOT EXISTS unaccent;
 
-
 CREATE OR REPLACE FUNCTION update_osm_city_point() RETURNS VOID AS $$
 BEGIN
 
@@ -62,16 +63,13 @@ CREATE OR REPLACE FUNCTION place_city.refresh() RETURNS trigger AS
   $BODY$
   BEGIN
     RAISE LOG 'Refresh place_city rank';
-    SELECT update_osm_city_point();
+    PERFORM update_osm_city_point();
     DELETE FROM place_city.updates;
     RETURN null;
   END;
   $BODY$
 language plpgsql;
 
-DROP TRIGGER IF EXISTS trigger_flag ON osm_city_point;
-DROP TRIGGER IF EXISTS trigger_refresh ON place_city.updates;
-
 CREATE TRIGGER trigger_flag
     AFTER INSERT OR UPDATE OR DELETE ON osm_city_point
     FOR EACH STATEMENT

layers/place/merge_country_rank.sql

@@ -1,3 +1,6 @@
+DROP TRIGGER IF EXISTS trigger_flag ON osm_country_point;
+DROP TRIGGER IF EXISTS trigger_refresh ON place_country.updates;
+
 ALTER TABLE osm_country_point DROP CONSTRAINT IF EXISTS osm_country_point_rank_constraint;
 
 -- etldoc: ne_10m_admin_0_countries   -> osm_country_point
@@ -57,16 +60,13 @@ CREATE OR REPLACE FUNCTION place_country.refresh() RETURNS trigger AS
   $BODY$
   BEGIN
     RAISE LOG 'Refresh place_country rank';
-    SELECT update_osm_country_point();
+    PERFORM update_osm_country_point();
     DELETE FROM place_country.updates;
     RETURN null;
   END;
   $BODY$
 language plpgsql;
 
-DROP TRIGGER IF EXISTS trigger_flag ON osm_country_point;
-DROP TRIGGER IF EXISTS trigger_refresh ON place_country.updates;
-
 CREATE TRIGGER trigger_flag
     AFTER INSERT OR UPDATE OR DELETE ON osm_country_point
     FOR EACH STATEMENT

layers/place/merge_state_rank.sql

@@ -1,3 +1,6 @@
+DROP TRIGGER IF EXISTS trigger_flag ON osm_state_point;
+DROP TRIGGER IF EXISTS trigger_refresh ON place_state.updates;
+
 ALTER TABLE osm_state_point DROP CONSTRAINT IF EXISTS osm_state_point_rank_constraint;
 
 -- etldoc: ne_10m_admin_1_states_provinces_shp   -> osm_state_point
@@ -53,16 +56,13 @@ CREATE OR REPLACE FUNCTION place_state.refresh() RETURNS trigger AS
   $BODY$
   BEGIN
     RAISE LOG 'Refresh place_state rank';
-    SELECT update_osm_state_point();
+    PERFORM update_osm_state_point();
     DELETE FROM place_state.updates;
     RETURN null;
   END;
   $BODY$
 language plpgsql;
 
-DROP TRIGGER IF EXISTS trigger_flag ON osm_state_point;
-DROP TRIGGER IF EXISTS trigger_refresh ON place_state.updates;
-
 CREATE TRIGGER trigger_flag
     AFTER INSERT OR UPDATE OR DELETE ON osm_state_point
     FOR EACH STATEMENT