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48 lines
1.2 KiB
PL/PgSQL
48 lines
1.2 KiB
PL/PgSQL
-- SPDX-License-Identifier: GPL-2.0-only
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--
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-- This file is part of Nominatim. (https://nominatim.org)
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--
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-- Copyright (C) 2022 by the Nominatim developer community.
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-- For a full list of authors see the git log.
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-- Trigger functions for location_postcode table.
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-- Trigger for updates of location_postcode
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--
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-- Computes the parent object the postcode most likely refers to.
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-- This will be the place that determines the address displayed when
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-- searching for this postcode.
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CREATE OR REPLACE FUNCTION postcode_update()
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RETURNS TRIGGER
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AS $$
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DECLARE
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partition SMALLINT;
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location RECORD;
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BEGIN
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IF NEW.indexed_status != 0 OR OLD.indexed_status = 0 THEN
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RETURN NEW;
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END IF;
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NEW.indexed_date = now();
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partition := get_partition(NEW.country_code);
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SELECT * FROM get_postcode_rank(NEW.country_code, NEW.postcode)
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INTO NEW.rank_search, NEW.rank_address;
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NEW.parent_place_id = 0;
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FOR location IN
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SELECT place_id
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FROM getNearFeatures(partition, NEW.geometry, NEW.rank_search)
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WHERE NOT isguess ORDER BY rank_address DESC, distance asc LIMIT 1
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LOOP
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NEW.parent_place_id = location.place_id;
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END LOOP;
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RETURN NEW;
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END;
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$$
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LANGUAGE plpgsql;
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