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Nominatim/lib-sql/functions/utils.sql
Sarah Hoffmann 7c79b07817 fix parameter use for ST_Project 
Before postgis 3.4 ST_Project required a geography as input and seemed
to have implicitly converted to geography. Since 3.4 geometry input
is supported but leads to a completely different result.
2023-08-20 13:52:03 +02:00

490 lines
14 KiB
PL/PgSQL
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-- SPDX-License-Identifier: GPL-2.0-only
--
-- This file is part of Nominatim. (https://nominatim.org)
--
-- Copyright (C) 2022 by the Nominatim developer community.
-- For a full list of authors see the git log.
-- 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;
-- Return the node members with a given label from a relation member list
-- as a set.
--
-- \param members Member list in osm2pgsql middle format.
-- \param memberLabels Array of labels to accept.
--
-- \returns Set of OSM ids of nodes that are found.
--
CREATE OR REPLACE FUNCTION get_rel_node_members(members TEXT[],
memberLabels TEXT[])
RETURNS SETOF BIGINT
AS $$
DECLARE
i INTEGER;
BEGIN
FOR i IN 1..ARRAY_UPPER(members,1) BY 2 LOOP
IF members[i+1] = ANY(memberLabels)
AND upper(substring(members[i], 1, 1))::char(1) = 'N'
THEN
RETURN NEXT substring(members[i], 2)::bigint;
END IF;
END LOOP;
RETURN;
END;
$$
LANGUAGE plpgsql IMMUTABLE;
-- Copy 'name' to or from the default language.
--
-- \param country_code Country code of the object being named.
-- \param[inout] name List of names of the object.
--
-- If the country named by country_code has a single default language,
-- then a `name` tag is copied to `name:<country_code>` if this tag does
-- not yet exist and vice versa.
CREATE OR REPLACE FUNCTION add_default_place_name(country_code VARCHAR(2),
INOUT name HSTORE)
AS $$
DECLARE
default_language VARCHAR(10);
BEGIN
IF name is not null AND array_upper(akeys(name),1) > 1 THEN
default_language := get_country_language_code(country_code);
IF default_language IS NOT NULL THEN
IF name ? 'name' AND NOT name ? ('name:'||default_language) THEN
name := name || hstore(('name:'||default_language), (name -> 'name'));
ELSEIF name ? ('name:'||default_language) AND NOT name ? 'name' THEN
name := name || hstore('name', (name -> ('name:'||default_language)));
END IF;
END IF;
END IF;
END;
$$
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 $$
DECLARE
place_centre GEOMETRY;
nearcountry RECORD;
BEGIN
place_centre := ST_PointOnSurface(place);
-- RAISE WARNING 'get_country_code, start: %', ST_AsText(place_centre);
-- Try for a OSM polygon
FOR nearcountry IN
SELECT country_code from location_area_country
WHERE country_code is not null and st_covers(geometry, place_centre) limit 1
LOOP
RETURN nearcountry.country_code;
END LOOP;
-- RAISE WARNING 'osm fallback: %', ST_AsText(place_centre);
-- Try for OSM fallback data
-- The order is to deal with places like HongKong that are 'states' within another polygon
FOR nearcountry IN
SELECT country_code from country_osm_grid
WHERE st_covers(geometry, place_centre) order by area asc limit 1
LOOP
RETURN nearcountry.country_code;
END LOOP;
-- RAISE WARNING 'near osm fallback: %', ST_AsText(place_centre);
RETURN NULL;
END;
$$
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 token_info Naming info with the address information.
-- \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(token_info JSONB,
partition SMALLINT,
centroid GEOMETRY)
RETURNS BIGINT
AS $$
DECLARE
parent_place_id BIGINT;
BEGIN
-- Check for addr:street attributes
parent_place_id := getNearestNamedRoadPlaceId(partition, centroid, token_info);
IF parent_place_id is not null THEN
{% if debug %}RAISE WARNING 'Get parent from addr:street: %', parent_place_id;{% endif %}
RETURN parent_place_id;
END IF;
-- Check for addr:place attributes.
parent_place_id := getNearestNamedPlacePlaceId(partition, centroid, token_info);
{% if debug %}RAISE WARNING 'Get parent from addr:place: %', parent_place_id;{% endif %}
RETURN parent_place_id;
END;
$$
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 a bounding box with an extent computed from the radius (in meters)
-- which in turn is derived from the given search rank.
CREATE OR REPLACE FUNCTION place_node_fuzzy_area(geom GEOMETRY, rank_search INTEGER)
RETURNS GEOMETRY
AS $$
DECLARE
radius FLOAT := 500;
BEGIN
IF rank_search <= 16 THEN -- city
radius := 15000;
ELSIF rank_search <= 18 THEN -- town
radius := 4000;
ELSIF rank_search <= 19 THEN -- village
radius := 2000;
ELSIF rank_search <= 20 THEN -- hamlet
radius := 1000;
END IF;
RETURN ST_Envelope(ST_Collect(
ST_Project(geom::geography, radius, 0.785398)::geometry,
ST_Project(geom::geography, radius, 3.9269908)::geometry));
END;
$$
LANGUAGE plpgsql IMMUTABLE;
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,
centroid GEOMETRY)
RETURNS BOOLEAN
AS $$
DECLARE
locationid INTEGER;
secgeo GEOMETRY;
postcode TEXT;
BEGIN
PERFORM deleteLocationArea(partition, place_id, rank_search);
-- add postcode only if it contains a single entry, i.e. ignore postcode lists
postcode := NULL;
IF in_postcode is not null AND in_postcode not similar to '%(,|;)%' THEN
postcode := upper(trim (in_postcode));
END IF;
IF ST_GeometryType(geometry) in ('ST_Polygon','ST_MultiPolygon') THEN
FOR secgeo IN select split_geometry(geometry) AS geom LOOP
PERFORM insertLocationAreaLarge(partition, place_id, country_code, keywords, rank_search, rank_address, false, postcode, centroid, secgeo);
END LOOP;
ELSEIF ST_GeometryType(geometry) = 'ST_Point' THEN
secgeo := place_node_fuzzy_area(geometry, rank_search);
PERFORM insertLocationAreaLarge(partition, place_id, country_code, keywords, rank_search, rank_address, true, postcode, centroid, secgeo);
END IF;
RETURN true;
END;
$$
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 $$
DECLARE
osmid BIGINT;
osmtype character(1);
pclass text;
ptype text;
BEGIN
SELECT osm_type, osm_id, class, type FROM placex WHERE place_id = placeid INTO osmtype, osmid, pclass, ptype;
DELETE FROM import_polygon_delete where osm_type = osmtype and osm_id = osmid and class = pclass and type = ptype;
DELETE FROM import_polygon_error where osm_type = osmtype and osm_id = osmid and class = pclass and type = ptype;
-- force delete by directly entering it into the to-be-deleted table
INSERT INTO place_to_be_deleted (osm_type, osm_id, class, type, deferred)
VALUES(osmtype, osmid, pclass, ptype, false);
PERFORM flush_deleted_places();
RETURN TRUE;
END;
$$
LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION place_force_update(placeid BIGINT)
RETURNS BOOLEAN
AS $$
DECLARE
placegeom GEOMETRY;
geom GEOMETRY;
diameter FLOAT;
rank SMALLINT;
BEGIN
UPDATE placex SET indexed_status = 2 WHERE place_id = placeid;
SELECT geometry, rank_address INTO placegeom, rank
FROM placex WHERE place_id = placeid;
IF placegeom IS NOT NULL AND ST_IsValid(placegeom) THEN
IF ST_GeometryType(placegeom) in ('ST_Polygon','ST_MultiPolygon')
AND rank > 0
THEN
FOR geom IN SELECT split_geometry(placegeom) LOOP
UPDATE placex SET indexed_status = 2
WHERE ST_Intersects(geom, placex.geometry)
and indexed_status = 0
and ((rank_address = 0 and rank_search > rank) or rank_address > rank)
and (rank_search < 28 or name is not null or (rank >= 16 and address ? 'place'));
END LOOP;
ELSE
diameter := update_place_diameter(rank);
IF diameter > 0 THEN
IF rank >= 26 THEN
-- roads may cause reparenting for >27 rank places
update placex set indexed_status = 2 where indexed_status = 0 and rank_search > rank and ST_DWithin(placex.geometry, placegeom, diameter);
ELSEIF rank >= 16 THEN
-- up to rank 16, street-less addresses may need reparenting
update placex set indexed_status = 2 where indexed_status = 0 and rank_search > rank and ST_DWithin(placex.geometry, placegeom, diameter) and (rank_search < 28 or name is not null or address ? 'place');
ELSE
-- for all other places the search terms may change as well
update placex set indexed_status = 2 where indexed_status = 0 and rank_search > rank and ST_DWithin(placex.geometry, placegeom, diameter) and (rank_search < 28 or name is not null);
END IF;
END IF;
END IF;
RETURN TRUE;
END IF;
RETURN FALSE;
END;
$$
LANGUAGE plpgsql;
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