54 lines
2.1 KiB
MySQL
54 lines
2.1 KiB
MySQL
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-- Interfacess of the server extension
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---- geocode_namedplace(city_name text)
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CREATE OR REPLACE FUNCTION geocode_namedplace(user_id name, tx_id bigint, city_name text)
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RETURNS Geometry AS $$
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plpy.debug('Entering geocode_namedplace(city_name text)')
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plpy.debug('user_id = %s' % user_id)
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#-- Access control
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#-- TODO: this should be part of cdb python library
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if user_id == 'publicuser':
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plpy.error('The api_key must be provided')
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#--TODO: rate limiting check
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#--TODO: quota check
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#-- Copied from the doc, see http://www.postgresql.org/docs/9.4/static/plpython-database.html
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plan = plpy.prepare("SELECT cdb_geocoder_server._geocode_namedplace($1) AS mypoint", ["text"])
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rv = plpy.execute(plan, [city_name], 1)
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plpy.debug('Returning from Returning from geocode_namedplace')
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return rv[0]["mypoint"]
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$$ LANGUAGE plpythonu;
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---- geocode_admin1_polygons(admin1_name text, country_name text)
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--------------------------------------------------------------------------------
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-- Implementation of the server extension
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-- Note: these functions depend on the cdb_geocoder extension
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---- geocode_namedplace(city_name text)
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CREATE OR REPLACE FUNCTION _geocode_namedplace(city_name text)
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RETURNS Geometry AS $$
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DECLARE
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ret Geometry;
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BEGIN
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SELECT geom INTO ret
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FROM (
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WITH best AS (SELECT s AS q, (SELECT the_geom FROM global_cities_points_limited gp WHERE gp.lowername = lower(p.s) ORDER BY population DESC LIMIT 1) AS geom FROM (SELECT city_name as s) p),
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next AS (SELECT p.s AS q, (SELECT gp.the_geom FROM global_cities_points_limited gp, global_cities_alternates_limited ga WHERE lower(p.s) = ga.lowername AND ga.geoname_id = gp.geoname_id ORDER BY preferred DESC LIMIT 1) geom FROM (SELECT city_name as s) p WHERE p.s NOT IN (SELECT q FROM best WHERE geom IS NOT NULL))
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SELECT q, geom, TRUE AS success FROM best WHERE geom IS NOT NULL
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UNION ALL
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SELECT q, geom, CASE WHEN geom IS NULL THEN FALSE ELSE TRUE END AS success FROM next
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) v;
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RETURN ret;
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END
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$$ LANGUAGE plpgsql;
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---- geocode_namedplace(city_name text, country_name text)
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