1d91b9ef6e
Tag all SQL materialized views with a machine-readable comment to indicate that this materialized view can be created without data: /* DELAY_MATERIALIZED_VIEW_CREATION */ In the next version of tools this comment can be optionally replaced with the "WITH NO DATA" parameter, thus allowing a much faster execution of the SQL script. All materialized viewes will be populated with data in parallel afterwards using the `refresh-views` tools script.
54 lines
1.8 KiB
PL/PgSQL
54 lines
1.8 KiB
PL/PgSQL
DROP TRIGGER IF EXISTS trigger_flag_point ON osm_water_polygon;
|
|
DROP TRIGGER IF EXISTS trigger_refresh ON water_point.updates;
|
|
|
|
-- etldoc: osm_water_polygon -> osm_water_point
|
|
-- etldoc: lake_centerline -> osm_water_point
|
|
DROP MATERIALIZED VIEW IF EXISTS osm_water_point CASCADE;
|
|
|
|
CREATE MATERIALIZED VIEW osm_water_point AS (
|
|
SELECT
|
|
wp.osm_id, ST_PointOnSurface(wp.geometry) AS geometry,
|
|
wp.name, wp.name_en, wp.name_de,
|
|
update_tags(wp.tags, ST_PointOnSurface(wp.geometry)) AS tags,
|
|
ST_Area(wp.geometry) AS area,
|
|
wp.is_intermittent
|
|
FROM osm_water_polygon AS wp
|
|
LEFT JOIN lake_centerline ll ON wp.osm_id = ll.osm_id
|
|
WHERE ll.osm_id IS NULL AND wp.name <> ''
|
|
) /* DELAY_MATERIALIZED_VIEW_CREATION */;
|
|
CREATE INDEX IF NOT EXISTS osm_water_point_geometry_idx ON osm_water_point USING gist (geometry);
|
|
|
|
-- Handle updates
|
|
|
|
CREATE SCHEMA IF NOT EXISTS water_point;
|
|
|
|
CREATE TABLE IF NOT EXISTS water_point.updates(id serial primary key, t text, unique (t));
|
|
CREATE OR REPLACE FUNCTION water_point.flag() RETURNS trigger AS $$
|
|
BEGIN
|
|
INSERT INTO water_point.updates(t) VALUES ('y') ON CONFLICT(t) DO NOTHING;
|
|
RETURN null;
|
|
END;
|
|
$$ language plpgsql;
|
|
|
|
CREATE OR REPLACE FUNCTION water_point.refresh() RETURNS trigger AS
|
|
$BODY$
|
|
BEGIN
|
|
RAISE LOG 'Refresh water_point';
|
|
REFRESH MATERIALIZED VIEW osm_water_point;
|
|
DELETE FROM water_point.updates;
|
|
RETURN null;
|
|
END;
|
|
$BODY$
|
|
language plpgsql;
|
|
|
|
CREATE TRIGGER trigger_flag_point
|
|
AFTER INSERT OR UPDATE OR DELETE ON osm_water_polygon
|
|
FOR EACH STATEMENT
|
|
EXECUTE PROCEDURE water_point.flag();
|
|
|
|
CREATE CONSTRAINT TRIGGER trigger_refresh
|
|
AFTER INSERT ON water_point.updates
|
|
INITIALLY DEFERRED
|
|
FOR EACH ROW
|
|
EXECUTE PROCEDURE water_point.refresh();
|