kopia lustrzana https://github.com/openmaptiles/openmaptiles
54 wiersze
1.7 KiB
PL/PgSQL
54 wiersze
1.7 KiB
PL/PgSQL
DROP TRIGGER IF EXISTS trigger_flag_line ON osm_water_polygon;
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DROP TRIGGER IF EXISTS trigger_refresh ON water_lakeline.updates;
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-- etldoc: osm_water_polygon -> osm_water_lakeline
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-- etldoc: lake_centerline -> osm_water_lakeline
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DROP MATERIALIZED VIEW IF EXISTS osm_water_lakeline CASCADE;
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CREATE MATERIALIZED VIEW osm_water_lakeline AS (
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SELECT wp.osm_id,
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ll.wkb_geometry AS geometry,
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name, name_en, name_de,
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update_tags(tags, ll.wkb_geometry) AS tags,
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ST_Area(wp.geometry) AS area,
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is_intermittent
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FROM osm_water_polygon AS wp
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INNER JOIN lake_centerline ll ON wp.osm_id = ll.osm_id
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WHERE wp.name <> '' AND ST_IsValid(wp.geometry)
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);
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CREATE INDEX IF NOT EXISTS osm_water_lakeline_geometry_idx ON osm_water_lakeline USING gist(geometry);
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-- Handle updates
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CREATE SCHEMA IF NOT EXISTS water_lakeline;
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CREATE TABLE IF NOT EXISTS water_lakeline.updates(id serial primary key, t text, unique (t));
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CREATE OR REPLACE FUNCTION water_lakeline.flag() RETURNS trigger AS $$
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BEGIN
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INSERT INTO water_lakeline.updates(t) VALUES ('y') ON CONFLICT(t) DO NOTHING;
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RETURN null;
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END;
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$$ language plpgsql;
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CREATE OR REPLACE FUNCTION water_lakeline.refresh() RETURNS trigger AS
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$BODY$
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BEGIN
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RAISE LOG 'Refresh water_lakeline';
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REFRESH MATERIALIZED VIEW osm_water_lakeline;
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DELETE FROM water_lakeline.updates;
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RETURN null;
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END;
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$BODY$
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language plpgsql;
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CREATE TRIGGER trigger_flag_line
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AFTER INSERT OR UPDATE OR DELETE ON osm_water_polygon
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FOR EACH STATEMENT
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EXECUTE PROCEDURE water_lakeline.flag();
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CREATE CONSTRAINT TRIGGER trigger_refresh
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AFTER INSERT ON water_lakeline.updates
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INITIALLY DEFERRED
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FOR EACH ROW
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EXECUTE PROCEDURE water_lakeline.refresh();
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