osm-search/Nominatim
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Nominatim/sql/functions/utils.sql

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PL/PgSQL
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-- Assorted helper functions for the triggers.
CREATE OR REPLACE FUNCTION geometry_sector(partition INTEGER, place geometry)
RETURNS INTEGER
AS $$
DECLARE
NEWgeometry geometry;
BEGIN
-- RAISE WARNING '%',place;
NEWgeometry := ST_PointOnSurface(place);
RETURN (partition*1000000) + (500-ST_X(NEWgeometry)::integer)*1000 + (500-ST_Y(NEWgeometry)::integer);
END;
$$
LANGUAGE plpgsql IMMUTABLE;
CREATE OR REPLACE FUNCTION array_merge(a INTEGER[], b INTEGER[])
RETURNS INTEGER[]
AS $$
DECLARE
i INTEGER;
r INTEGER[];
BEGIN
IF array_upper(a, 1) IS NULL THEN
RETURN b;
END IF;
IF array_upper(b, 1) IS NULL THEN
RETURN a;
END IF;
r := a;
FOR i IN 1..array_upper(b, 1) LOOP
IF NOT (ARRAY[b[i]] <@ r) THEN
r := r || b[i];
END IF;
END LOOP;
RETURN r;
END;
$$
LANGUAGE plpgsql IMMUTABLE;
CREATE OR REPLACE FUNCTION reverse_place_diameter(rank_search SMALLINT)
RETURNS FLOAT
AS $$
BEGIN
IF rank_search <= 4 THEN
RETURN 5.0;
ELSIF rank_search <= 8 THEN
RETURN 1.8;
ELSIF rank_search <= 12 THEN
RETURN 0.6;
ELSIF rank_search <= 17 THEN
RETURN 0.16;
ELSIF rank_search <= 18 THEN
RETURN 0.08;
ELSIF rank_search <= 19 THEN
RETURN 0.04;
END IF;
RETURN 0.02;
END;
$$
LANGUAGE plpgsql IMMUTABLE;
CREATE OR REPLACE FUNCTION get_postcode_rank(country_code VARCHAR(2), postcode TEXT,
OUT rank_search SMALLINT,
OUT rank_address SMALLINT)
AS $$
DECLARE
part TEXT;
BEGIN
rank_search := 30;
rank_address := 30;
postcode := upper(postcode);
IF country_code = 'gb' THEN
IF postcode ~ '^([A-Z][A-Z]?[0-9][0-9A-Z]? [0-9][A-Z][A-Z])$' THEN
rank_search := 25;
rank_address := 5;
ELSEIF postcode ~ '^([A-Z][A-Z]?[0-9][0-9A-Z]? [0-9])$' THEN
rank_search := 23;
rank_address := 5;
ELSEIF postcode ~ '^([A-Z][A-Z]?[0-9][0-9A-Z])$' THEN
rank_search := 21;
rank_address := 5;
END IF;
ELSEIF country_code = 'sg' THEN
IF postcode ~ '^([0-9]{6})$' THEN
rank_search := 25;
rank_address := 11;
END IF;
ELSEIF country_code = 'de' THEN
IF postcode ~ '^([0-9]{5})$' THEN
rank_search := 21;
rank_address := 11;
END IF;
ELSE
-- Guess at the postcode format and coverage (!)
IF postcode ~ '^[A-Z0-9]{1,5}$' THEN -- Probably too short to be very local
rank_search := 21;
rank_address := 11;
ELSE
-- Does it look splitable into and area and local code?
part := substring(postcode from '^([- :A-Z0-9]+)([- :][A-Z0-9]+)$');
IF part IS NOT NULL THEN
rank_search := 25;
rank_address := 11;
ELSEIF postcode ~ '^[- :A-Z0-9]{6,}$' THEN
rank_search := 21;
rank_address := 11;
END IF;
END IF;
END IF;
END;
$$
LANGUAGE plpgsql IMMUTABLE;
-- Find the nearest artificial postcode for the given geometry.
-- TODO For areas there should not be more than two inside the geometry.
CREATE OR REPLACE FUNCTION get_nearest_postcode(country VARCHAR(2), geom GEOMETRY)
RETURNS TEXT
AS $$
DECLARE
outcode TEXT;
cnt INTEGER;
BEGIN
-- If the geometry is an area then only one postcode must be within
-- that area, otherwise consider the area as not having a postcode.
IF ST_GeometryType(geom) in ('ST_Polygon','ST_MultiPolygon') THEN
SELECT min(postcode), count(*) FROM
(SELECT postcode FROM location_postcode
WHERE ST_Contains(geom, location_postcode.geometry) LIMIT 2) sub
INTO outcode, cnt;
IF cnt = 1 THEN
RETURN outcode;
ELSE
RETURN null;
END IF;
END IF;
SELECT postcode FROM location_postcode
WHERE ST_DWithin(geom, location_postcode.geometry, 0.05)
AND location_postcode.country_code = country
ORDER BY ST_Distance(geom, location_postcode.geometry) LIMIT 1
INTO outcode;
RETURN outcode;
END;
$$
LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION get_country_code(place geometry)
RETURNS TEXT
AS $$
DECLARE
place_centre GEOMETRY;
nearcountry RECORD;
BEGIN
place_centre := ST_PointOnSurface(place);
-- RAISE WARNING 'get_country_code, start: %', ST_AsText(place_centre);
-- Try for a OSM polygon
FOR nearcountry IN
SELECT country_code from location_area_country
WHERE country_code is not null and st_covers(geometry, place_centre) limit 1
LOOP
RETURN nearcountry.country_code;
END LOOP;
-- RAISE WARNING 'osm fallback: %', ST_AsText(place_centre);
-- Try for OSM fallback data
-- The order is to deal with places like HongKong that are 'states' within another polygon
FOR nearcountry IN
SELECT country_code from country_osm_grid
WHERE st_covers(geometry, place_centre) order by area asc limit 1
LOOP
RETURN nearcountry.country_code;
END LOOP;
-- RAISE WARNING 'near osm fallback: %', ST_AsText(place_centre);
--
FOR nearcountry IN
SELECT country_code from country_osm_grid
WHERE st_dwithin(geometry, place_centre, 0.5)
ORDER BY st_distance(geometry, place_centre) asc, area asc limit 1
LOOP
RETURN nearcountry.country_code;
END LOOP;
RETURN NULL;
END;
$$
LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION get_country_language_code(search_country_code VARCHAR(2))
RETURNS TEXT
AS $$
DECLARE
nearcountry RECORD;
BEGIN
FOR nearcountry IN
SELECT distinct country_default_language_code from country_name
WHERE country_code = search_country_code limit 1
LOOP
RETURN lower(nearcountry.country_default_language_code);
END LOOP;
RETURN NULL;
END;
$$
LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION get_partition(in_country_code VARCHAR(10))
RETURNS INTEGER
AS $$
DECLARE
nearcountry RECORD;
BEGIN
FOR nearcountry IN
SELECT partition from country_name where country_code = in_country_code
LOOP
RETURN nearcountry.partition;
END LOOP;
RETURN 0;
END;
$$
LANGUAGE plpgsql STABLE;
-- Find the parent of an address with addr:street/addr:place tag.
--
-- \param street Value of addr:street or NULL if tag is missing.
-- \param place Value of addr:place or NULL if tag is missing.
-- \param partition Partition where to search the parent.
-- \param centroid Location of the address.
--
-- \return Place ID of the parent if one was found, NULL otherwise.
CREATE OR REPLACE FUNCTION find_parent_for_address(street TEXT, place TEXT,
partition SMALLINT,
centroid GEOMETRY)
RETURNS BIGINT
AS $$
DECLARE
parent_place_id BIGINT;
word_ids INTEGER[];
BEGIN
IF street is not null THEN
-- Check for addr:street attributes
-- Note that addr:street links can only be indexed, once the street itself is indexed
word_ids := word_ids_from_name(street);
IF word_ids is not null THEN
parent_place_id := getNearestNamedRoadFeature(partition, centroid, word_ids);
IF parent_place_id is not null THEN
--DEBUG: RAISE WARNING 'Get parent form addr:street: %', parent.place_id;
RETURN parent_place_id;
END IF;
END IF;
END IF;
-- Check for addr:place attributes.
IF place is not null THEN
word_ids := word_ids_from_name(place);
IF word_ids is not null THEN
parent_place_id := getNearestNamedPlaceFeature(partition, centroid, word_ids);
IF parent_place_id is not null THEN
--DEBUG: RAISE WARNING 'Get parent form addr:place: %', parent.place_id;
RETURN parent_place_id;
END IF;
END IF;
END IF;
RETURN NULL;
END;
$$
LANGUAGE plpgsql STABLE;
CREATE OR REPLACE FUNCTION delete_location(OLD_place_id BIGINT)
RETURNS BOOLEAN
AS $$
DECLARE
BEGIN
DELETE FROM location_area where place_id = OLD_place_id;
-- TODO:location_area
RETURN true;
END;
$$
LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION add_location(place_id BIGINT, country_code varchar(2),
partition INTEGER, keywords INTEGER[],
rank_search INTEGER, rank_address INTEGER,
in_postcode TEXT, geometry GEOMETRY)
RETURNS BOOLEAN
AS $$
DECLARE
locationid INTEGER;
centroid GEOMETRY;
diameter FLOAT;
x BOOLEAN;
splitGeom RECORD;
secgeo GEOMETRY;
postcode TEXT;
BEGIN
IF rank_search > 25 THEN
RAISE EXCEPTION 'Adding location with rank > 25 (% rank %)', place_id, rank_search;
END IF;
x := deleteLocationArea(partition, place_id, rank_search);
-- add postcode only if it contains a single entry, i.e. ignore postcode lists
postcode := NULL;
IF in_postcode is not null AND in_postcode not similar to '%(,|;)%' THEN
postcode := upper(trim (in_postcode));
END IF;
IF ST_GeometryType(geometry) in ('ST_Polygon','ST_MultiPolygon') THEN
centroid := ST_Centroid(geometry);
FOR secgeo IN select split_geometry(geometry) AS geom LOOP
x := insertLocationAreaLarge(partition, place_id, country_code, keywords, rank_search, rank_address, false, postcode, centroid, secgeo);
END LOOP;
ELSE
diameter := 0.02;
IF rank_address = 0 THEN
diameter := 0.02;
ELSEIF rank_search <= 14 THEN
diameter := 1.2;
ELSEIF rank_search <= 15 THEN
diameter := 1;
ELSEIF rank_search <= 16 THEN
diameter := 0.5;
ELSEIF rank_search <= 17 THEN
diameter := 0.2;
ELSEIF rank_search <= 21 THEN
diameter := 0.05;
ELSEIF rank_search = 25 THEN
diameter := 0.005;
END IF;
-- RAISE WARNING 'adding % diameter %', place_id, diameter;
secgeo := ST_Buffer(geometry, diameter);
x := insertLocationAreaLarge(partition, place_id, country_code, keywords, rank_search, rank_address, true, postcode, ST_Centroid(geometry), secgeo);
END IF;
RETURN true;
END;
$$
LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION quad_split_geometry(geometry GEOMETRY, maxarea FLOAT,
maxdepth INTEGER)
RETURNS SETOF GEOMETRY
AS $$
DECLARE
xmin FLOAT;
ymin FLOAT;
xmax FLOAT;
ymax FLOAT;
xmid FLOAT;
ymid FLOAT;
secgeo GEOMETRY;
secbox GEOMETRY;
seg INTEGER;
geo RECORD;
area FLOAT;
remainingdepth INTEGER;
added INTEGER;
BEGIN
-- RAISE WARNING 'quad_split_geometry: maxarea=%, depth=%',maxarea,maxdepth;
IF (ST_GeometryType(geometry) not in ('ST_Polygon','ST_MultiPolygon') OR NOT ST_IsValid(geometry)) THEN
RETURN NEXT geometry;
RETURN;
END IF;
remainingdepth := maxdepth - 1;
area := ST_AREA(geometry);
IF remainingdepth < 1 OR area < maxarea THEN
RETURN NEXT geometry;
RETURN;
END IF;
xmin := st_xmin(geometry);
xmax := st_xmax(geometry);
ymin := st_ymin(geometry);
ymax := st_ymax(geometry);
secbox := ST_SetSRID(ST_MakeBox2D(ST_Point(ymin,xmin),ST_Point(ymax,xmax)),4326);
-- if the geometry completely covers the box don't bother to slice any more
IF ST_AREA(secbox) = area THEN
RETURN NEXT geometry;
RETURN;
END IF;
xmid := (xmin+xmax)/2;
ymid := (ymin+ymax)/2;
added := 0;
FOR seg IN 1..4 LOOP
IF seg = 1 THEN
secbox := ST_SetSRID(ST_MakeBox2D(ST_Point(xmin,ymin),ST_Point(xmid,ymid)),4326);
END IF;
IF seg = 2 THEN
secbox := ST_SetSRID(ST_MakeBox2D(ST_Point(xmin,ymid),ST_Point(xmid,ymax)),4326);
END IF;
IF seg = 3 THEN
secbox := ST_SetSRID(ST_MakeBox2D(ST_Point(xmid,ymin),ST_Point(xmax,ymid)),4326);
END IF;
IF seg = 4 THEN
secbox := ST_SetSRID(ST_MakeBox2D(ST_Point(xmid,ymid),ST_Point(xmax,ymax)),4326);
END IF;
IF st_intersects(geometry, secbox) THEN
secgeo := st_intersection(geometry, secbox);
IF NOT ST_IsEmpty(secgeo) AND ST_GeometryType(secgeo) in ('ST_Polygon','ST_MultiPolygon') THEN
FOR geo IN select quad_split_geometry(secgeo, maxarea, remainingdepth) as geom LOOP
IF NOT ST_IsEmpty(geo.geom) AND ST_GeometryType(geo.geom) in ('ST_Polygon','ST_MultiPolygon') THEN
added := added + 1;
RETURN NEXT geo.geom;
END IF;
END LOOP;
END IF;
END IF;
END LOOP;
RETURN;
END;
$$
LANGUAGE plpgsql IMMUTABLE;
CREATE OR REPLACE FUNCTION split_geometry(geometry GEOMETRY)
RETURNS SETOF GEOMETRY
AS $$
DECLARE
geo RECORD;
BEGIN
-- 10000000000 is ~~ 1x1 degree
FOR geo IN select quad_split_geometry(geometry, 0.25, 20) as geom LOOP
RETURN NEXT geo.geom;
END LOOP;
RETURN;
END;
$$
LANGUAGE plpgsql IMMUTABLE;
CREATE OR REPLACE FUNCTION place_force_delete(placeid BIGINT)
RETURNS BOOLEAN
AS $$
DECLARE
osmid BIGINT;
osmtype character(1);
pclass text;
ptype text;
BEGIN
SELECT osm_type, osm_id, class, type FROM placex WHERE place_id = placeid INTO osmtype, osmid, pclass, ptype;
DELETE FROM import_polygon_delete where osm_type = osmtype and osm_id = osmid and class = pclass and type = ptype;
DELETE FROM import_polygon_error where osm_type = osmtype and osm_id = osmid and class = pclass and type = ptype;
-- force delete from place/placex by making it a very small geometry
UPDATE place set geometry = ST_SetSRID(ST_Point(0,0), 4326) where osm_type = osmtype and osm_id = osmid and class = pclass and type = ptype;
DELETE FROM place where osm_type = osmtype and osm_id = osmid and class = pclass and type = ptype;
RETURN TRUE;
END;
$$
LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION place_force_update(placeid BIGINT)
RETURNS BOOLEAN
AS $$
DECLARE
placegeom GEOMETRY;
geom GEOMETRY;
diameter FLOAT;
rank INTEGER;
BEGIN
UPDATE placex SET indexed_status = 2 WHERE place_id = placeid;
SELECT geometry, rank_search FROM placex WHERE place_id = placeid INTO placegeom, rank;
IF placegeom IS NOT NULL AND ST_IsValid(placegeom) THEN
IF ST_GeometryType(placegeom) in ('ST_Polygon','ST_MultiPolygon') THEN
FOR geom IN select split_geometry(placegeom) FROM placex WHERE place_id = placeid LOOP
update placex set indexed_status = 2 where (st_covers(geom, placex.geometry) OR ST_Intersects(geom, placex.geometry))
AND rank_search > rank and indexed_status = 0 and ST_geometrytype(placex.geometry) = 'ST_Point' and (rank_search < 28 or name is not null or (rank >= 16 and address ? 'place'));
update placex set indexed_status = 2 where (st_covers(geom, placex.geometry) OR ST_Intersects(geom, placex.geometry))
AND rank_search > rank and indexed_status = 0 and ST_geometrytype(placex.geometry) != 'ST_Point' and (rank_search < 28 or name is not null or (rank >= 16 and address ? 'place'));
END LOOP;
ELSE
diameter := 0;
IF rank = 11 THEN
diameter := 0.05;
ELSEIF rank < 18 THEN
diameter := 0.1;
ELSEIF rank < 20 THEN
diameter := 0.05;
ELSEIF rank = 21 THEN
diameter := 0.001;
ELSEIF rank < 24 THEN
diameter := 0.02;
ELSEIF rank < 26 THEN
diameter := 0.002; -- 100 to 200 meters
ELSEIF rank < 28 THEN
diameter := 0.001; -- 50 to 100 meters
END IF;
IF diameter > 0 THEN
IF rank >= 26 THEN
-- roads may cause reparenting for >27 rank places
update placex set indexed_status = 2 where indexed_status = 0 and rank_search > rank and ST_DWithin(placex.geometry, placegeom, diameter);
ELSEIF rank >= 16 THEN
-- up to rank 16, street-less addresses may need reparenting
update placex set indexed_status = 2 where indexed_status = 0 and rank_search > rank and ST_DWithin(placex.geometry, placegeom, diameter) and (rank_search < 28 or name is not null or address ? 'place');
ELSE
-- for all other places the search terms may change as well
update placex set indexed_status = 2 where indexed_status = 0 and rank_search > rank and ST_DWithin(placex.geometry, placegeom, diameter) and (rank_search < 28 or name is not null);
END IF;
END IF;
END IF;
RETURN TRUE;
END IF;
RETURN FALSE;
END;
$$
LANGUAGE plpgsql;
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