dataservices-api/client/sql/21_bulk_geocoding_functions.sql

CREATE OR REPLACE FUNCTION cdb_dataservices_client.cdb_bulk_geocode_street_point (query text,
    country_column text, state_column text, city_column text, street_column text)
RETURNS SETOF cdb_dataservices_client.geocoding AS $$
DECLARE
  query_row_count integer;
  enough_quota boolean;

  cartodb_id_batch integer;
  batches_n integer;
  BATCHES_SIZE CONSTANT numeric := 100;
  current_row_count integer ;
BEGIN
  EXECUTE format('SELECT COUNT(1) from (%s) _x', query) INTO query_row_count;

  RAISE DEBUG 'cdb_bulk_geocode_street_point --> query_row_count: %; query: %; country: %; state: %; city: %; street: %',
      query_row_count, query, country_column, state_column, city_column, street_column;
  SELECT cdb_dataservices_client.cdb_enough_quota('hires_geocoder', query_row_count) INTO enough_quota;
  IF enough_quota IS NOT NULL AND enough_quota THEN
    RAISE EXCEPTION 'Remaining quota: %. Estimated cost: %', remaining_quota, query_row_count;
  END IF;

  EXECUTE format('SELECT ceil(max(cartodb_id)::float/%s) FROM (%s) _x', BATCHES_SIZE, query) INTO batches_n;

  RAISE DEBUG 'batches_n: %', batches_n;

  CREATE TEMPORARY TABLE bulk_geocode_street_point
      (cartodb_id integer, the_geom geometry(Multipolygon,4326), metadata jsonb);

  FOR cartodb_id_batch in 0..(batches_n - 1)
  LOOP

    EXECUTE format(
      'WITH geocoding_data as (' ||
      '   SELECT ' ||
      '      json_build_object(''id'', cartodb_id, ''address'', %s, ''city'', %s, ''state'', %s, ''country'', %s) as data , ' ||
      '      floor((cartodb_id-1)::float/$1) as batch' ||
      '   FROM (%s) _x' ||
      ')' ||
      'INSERT INTO bulk_geocode_street_point SELECT (cdb_dataservices_client._cdb_bulk_geocode_street_point(jsonb_agg(data))).* ' ||
      'FROM geocoding_data ' ||
      'WHERE batch = $2', street_column, city_column, state_column, country_column, query)
    USING BATCHES_SIZE, cartodb_id_batch;

    GET DIAGNOSTICS current_row_count = ROW_COUNT;
    RAISE DEBUG 'Batch % --> %', cartodb_id_batch, current_row_count;

  END LOOP;

  RETURN QUERY SELECT * FROM bulk_geocode_street_point;
END;
$$ LANGUAGE 'plpgsql' SECURITY DEFINER VOLATILE PARALLEL UNSAFE;