openmaptiles/layers/poi/layer.sql

-- etldoc: layer_poi[shape=record fillcolor=lightpink, style="rounded,filled",  
-- etldoc:     label="layer_poi | <z14_> z14_" ] ;

CREATE OR REPLACE FUNCTION layer_poi(bbox geometry, zoom_level integer, pixel_width numeric)
RETURNS TABLE(osm_id bigint, geometry geometry, name text, name_en text, class text, subclass text, "rank" int) AS $$
    SELECT osm_id, geometry, name, NULLIF(name_en, ''), poi_class(subclass) AS class, subclass,
        row_number() OVER (
            PARTITION BY LabelGrid(geometry, 100 * pixel_width)
            ORDER BY poi_class_rank(poi_class(subclass)) ASC, length(name) DESC
        )::int AS "rank"
    -- etldoc: osm_poi_point ->  layer_poi:z14_        
    FROM osm_poi_point
    WHERE geometry && bbox
      AND zoom_level >= 14
      AND name <> ''
    ORDER BY "rank";
$$ LANGUAGE SQL IMMUTABLE;