Basic poi layer

layers/poi/layer.sql

@@ -0,0 +1,8 @@
+CREATE OR REPLACE FUNCTION layer_poi(bbox geometry, zoom_level integer)
+RETURNS TABLE(osm_id bigint, geometry geometry, name text, name_en text, class text, subclass text) AS $$
+    SELECT id, geometry, name, NULLIF(name_en, ''), poi_class(subclass) AS class, subclass
+    FROM osm_poi_point
+    WHERE geometry && bbox
+      AND name <> ''
+      AND (zoom_level >= 14);
+$$ LANGUAGE SQL IMMUTABLE;