29 lines
876 B
PL/PgSQL
29 lines
876 B
PL/PgSQL
|
|
-- etldoc: osm_water_polygon -> osm_water_lakeline
|
|
-- etldoc: lake_centerline -> osm_water_lakeline
|
|
CREATE MATERIALIZED VIEW osm_water_lakeline AS (
|
|
SELECT wp.osm_id,
|
|
ll.wkb_geometry AS geometry,
|
|
name, name_en, ST_Area(wp.geometry) AS area
|
|
FROM osm_water_polygon AS wp
|
|
INNER JOIN lake_centerline ll ON wp.osm_id = ll.osm_id
|
|
WHERE wp.name <> ''
|
|
);
|
|
CREATE INDEX IF NOT EXISTS osm_water_lakeline_geometry_idx ON osm_water_lakeline USING gist(geometry);
|
|
|
|
-- Triggers
|
|
|
|
CREATE OR REPLACE FUNCTION refresh_osm_water_lakeline() RETURNS trigger AS
|
|
$BODY$
|
|
BEGIN
|
|
REFRESH MATERIALIZED VIEW osm_water_lakeline CONCURRENTLY;
|
|
RETURN null;
|
|
END;
|
|
$BODY$
|
|
language plpgsql
|
|
|
|
CREATE TRIGGER trigger_refresh_osm_water_lakeline
|
|
AFTER INSERT OR UPDATE OR DELETE ON osm_water_polygon
|
|
FOR EACH STATEMENT
|
|
EXECUTE PROCEDURE refresh_osm_water_lakeline;
|