Mercurial > gemma
view schema/search.sql @ 1109:74a75a5ce770
Added geonames data and extended search for villages/cities.
The free data from geonames https://download.geonames.org/ is imported
into the gemma data base (for the relevant states) and used to search
for cities and villages.
This data might be replaced by data from the RIS-index later on..?
author | Sascha Wilde <wilde@intevation.de> |
---|---|
date | Mon, 05 Nov 2018 13:07:16 +0100 |
parents | |
children | 6590208e3ee1 |
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CREATE FUNCTION search_bottlenecks(search_string text) RETURNS jsonb LANGUAGE plpgsql AS $$ DECLARE _result jsonb; BEGIN SELECT COALESCE(json_agg(r),'[]') INTO _result FROM (SELECT objnam AS name, ST_AsGeoJSON(ST_Centroid(area))::json AS geom, 'bottleneck' AS type FROM waterway.bottlenecks WHERE objnam ILIKE '%' || search_string || '%' ORDER BY name) r; RETURN _result; END; $$; CREATE FUNCTION search_cities(search_string text) RETURNS jsonb LANGUAGE plpgsql AS $$ DECLARE _result jsonb; BEGIN SELECT COALESCE(json_agg(r),'[]') INTO _result FROM (SELECT name || ' (' || country_code || ')' AS name, ST_AsGeoJSON(location)::json AS geom, 'city' AS type FROM waterway.geonames WHERE feature_code IN ('PPLA', 'PPLA1', 'PPLA2', 'PPLA3', 'PPLC') AND (name ILIKE '%' || search_string || '%' OR alternatenames ~* ('(^|,)' || search_string || '($|,)')) ORDER BY array_position(ARRAY['PPLC', 'PPLA', 'PPLA1', 'PPLA2', 'PPLA3'], feature_code::text), name) r; RETURN _result; END; $$; CREATE FUNCTION search_most(search_string text) RETURNS jsonb LANGUAGE plpgsql AS $$ BEGIN RETURN search_bottlenecks(search_string) || search_cities(search_string); END; $$;