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Merge pull request #131 from openmaptiles/trigger_tables_sql

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Lukas Martinelli
2017-01-16 09:38:47 +01:00
committed by GitHub
parent e10e2b9b94 e71311a8d8
commit 2d586bb47a
10 changed files with 522 additions and 115 deletions
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58
layers/transportation_name/merge_highways.sql
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@@ -1,16 +1,18 @@
DROP TABLE IF EXISTS osm_transportation_name_linestring CASCADE;
DROP TABLE IF EXISTS osm_transportation_name_linestring_gen1 CASCADE;
DROP TABLE IF EXISTS osm_transportation_name_linestring_gen2 CASCADE;
DROP TABLE IF EXISTS osm_transportation_name_linestring_gen3 CASCADE;
DROP TRIGGER IF EXISTS trigger_flag ON osm_highway_linestring;
DROP TRIGGER IF EXISTS trigger_refresh ON transportation_name.updates;
-- Instead of using relations to find out the road names we
-- stitch together the touching ways with the same name
-- to allow for nice label rendering
-- Because this works well for roads that do not have relations as well
DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring CASCADE;
DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen1 CASCADE;
DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen2 CASCADE;
DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen3 CASCADE;
-- etldoc: osm_highway_linestring -> osm_transportation_name_linestring
CREATE TABLE IF NOT EXISTS osm_transportation_name_linestring AS (
CREATE MATERIALIZED VIEW osm_transportation_name_linestring AS (
SELECT
(ST_Dump(geometry)).geom AS geometry,
-- NOTE: The osm_id is no longer the original one which can make it difficult
@@ -35,11 +37,10 @@ CREATE TABLE IF NOT EXISTS osm_transportation_name_linestring AS (
GROUP BY name, highway, ref
) AS highway_union
);
CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_geometry_idx ON osm_transportation_name_linestring USING gist(geometry);
-- etldoc: osm_transportation_name_linestring -> osm_transportation_name_linestring_gen1
CREATE TABLE IF NOT EXISTS osm_transportation_name_linestring_gen1 AS (
CREATE MATERIALIZED VIEW osm_transportation_name_linestring_gen1 AS (
SELECT ST_Simplify(geometry, 50) AS geometry, osm_id, member_osm_ids, name, ref, highway, z_order
FROM osm_transportation_name_linestring
WHERE highway IN ('motorway','trunk') AND ST_Length(geometry) > 8000
@@ -47,7 +48,7 @@ CREATE TABLE IF NOT EXISTS osm_transportation_name_linestring_gen1 AS (
CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen1_geometry_idx ON osm_transportation_name_linestring_gen1 USING gist(geometry);
-- etldoc: osm_transportation_name_linestring_gen1 -> osm_transportation_name_linestring_gen2
CREATE TABLE IF NOT EXISTS osm_transportation_name_linestring_gen2 AS (
CREATE MATERIALIZED VIEW osm_transportation_name_linestring_gen2 AS (
SELECT ST_Simplify(geometry, 120) AS geometry, osm_id, member_osm_ids, name, ref, highway, z_order
FROM osm_transportation_name_linestring_gen1
WHERE highway IN ('motorway','trunk') AND ST_Length(geometry) > 14000
@@ -55,9 +56,46 @@ CREATE TABLE IF NOT EXISTS osm_transportation_name_linestring_gen2 AS (
CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen2_geometry_idx ON osm_transportation_name_linestring_gen2 USING gist(geometry);
-- etldoc: osm_transportation_name_linestring_gen2 -> osm_transportation_name_linestring_gen3
CREATE TABLE IF NOT EXISTS osm_transportation_name_linestring_gen3 AS (
CREATE MATERIALIZED VIEW osm_transportation_name_linestring_gen3 AS (
SELECT ST_Simplify(geometry, 120) AS geometry, osm_id, member_osm_ids, name, ref, highway, z_order
FROM osm_transportation_name_linestring_gen2
WHERE highway = 'motorway' AND ST_Length(geometry) > 20000
);
CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen3_geometry_idx ON osm_transportation_name_linestring_gen3 USING gist(geometry);
-- Handle updates
CREATE SCHEMA IF NOT EXISTS transportation_name;
CREATE TABLE IF NOT EXISTS transportation_name.updates(id serial primary key, t text, unique (t));
CREATE OR REPLACE FUNCTION transportation_name.flag() RETURNS trigger AS $$
BEGIN
INSERT INTO transportation_name.updates(t) VALUES ('y') ON CONFLICT(t) DO NOTHING;
RETURN null;
END;
$$ language plpgsql;
CREATE OR REPLACE FUNCTION transportation_name.refresh() RETURNS trigger AS
$BODY$
BEGIN
RAISE LOG 'Refresh transportation_name';
REFRESH MATERIALIZED VIEW osm_transportation_name_linestring;
REFRESH MATERIALIZED VIEW osm_transportation_name_linestring_gen1;
REFRESH MATERIALIZED VIEW osm_transportation_name_linestring_gen2;
REFRESH MATERIALIZED VIEW osm_transportation_name_linestring_gen3;
DELETE FROM transportation_name.updates;
RETURN null;
END;
$BODY$
language plpgsql;
CREATE TRIGGER trigger_flag
AFTER INSERT OR UPDATE OR DELETE ON osm_highway_linestring
FOR EACH STATEMENT
EXECUTE PROCEDURE transportation_name.flag();
CREATE CONSTRAINT TRIGGER trigger_refresh
AFTER INSERT ON transportation_name.updates
INITIALLY DEFERRED
FOR EACH ROW
EXECUTE PROCEDURE transportation_name.refresh();