Fix SQL update logic (patch from 3.6.2)
This commit is contained in:
jirik
145
layers/transportation/update_transportation_merge.sql
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145
layers/transportation/update_transportation_merge.sql
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DROP MATERIALIZED VIEW IF EXISTS osm_transportation_merge_linestring CASCADE;
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DROP MATERIALIZED VIEW IF EXISTS osm_transportation_merge_linestring_gen3 CASCADE;
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DROP MATERIALIZED VIEW IF EXISTS osm_transportation_merge_linestring_gen4 CASCADE;
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DROP MATERIALIZED VIEW IF EXISTS osm_transportation_merge_linestring_gen5 CASCADE;
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DROP MATERIALIZED VIEW IF EXISTS osm_transportation_merge_linestring_gen6 CASCADE;
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DROP MATERIALIZED VIEW IF EXISTS osm_transportation_merge_linestring_gen7 CASCADE;
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DROP TRIGGER IF EXISTS trigger_flag_transportation ON osm_highway_linestring;
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DROP TRIGGER IF EXISTS trigger_refresh ON transportation.updates;
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-- Instead of using relations to find out the road names we
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-- stitch together the touching ways with the same name
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-- to allow for nice label rendering
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-- Because this works well for roads that do not have relations as well
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-- Improve performance of the sql in transportation_name/network_type.sql
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CREATE INDEX IF NOT EXISTS osm_highway_linestring_highway_idx
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ON osm_highway_linestring(highway);
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-- Improve performance of the sql below
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CREATE INDEX IF NOT EXISTS osm_highway_linestring_highway_partial_idx
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ON osm_highway_linestring(highway)
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WHERE highway IN ('motorway','trunk', 'primary');
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-- etldoc: osm_highway_linestring -> osm_transportation_merge_linestring
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CREATE MATERIALIZED VIEW osm_transportation_merge_linestring AS (
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SELECT
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(ST_Dump(geometry)).geom AS geometry,
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NULL::bigint AS osm_id,
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highway,
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z_order
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FROM (
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SELECT
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ST_LineMerge(ST_Collect(geometry)) AS geometry,
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highway,
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min(z_order) AS z_order
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FROM osm_highway_linestring
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WHERE highway IN ('motorway','trunk', 'primary')
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group by highway
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) AS highway_union
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);
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CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_geometry_idx
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ON osm_transportation_merge_linestring USING gist(geometry);
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CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_highway_partial_idx
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ON osm_transportation_merge_linestring(highway)
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WHERE highway IN ('motorway','trunk', 'primary');
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-- etldoc: osm_transportation_merge_linestring -> osm_transportation_merge_linestring_gen3
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CREATE MATERIALIZED VIEW osm_transportation_merge_linestring_gen3 AS (
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SELECT ST_Simplify(geometry, 120) AS geometry, osm_id, highway, z_order
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FROM osm_transportation_merge_linestring
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WHERE highway IN ('motorway','trunk', 'primary')
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);
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CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen3_geometry_idx
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ON osm_transportation_merge_linestring_gen3 USING gist(geometry);
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CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen3_highway_partial_idx
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ON osm_transportation_merge_linestring_gen3(highway)
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WHERE highway IN ('motorway','trunk', 'primary');
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-- etldoc: osm_transportation_merge_linestring_gen3 -> osm_transportation_merge_linestring_gen4
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CREATE MATERIALIZED VIEW osm_transportation_merge_linestring_gen4 AS (
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SELECT ST_Simplify(geometry, 200) AS geometry, osm_id, highway, z_order
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FROM osm_transportation_merge_linestring_gen3
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WHERE highway IN ('motorway','trunk', 'primary') AND ST_Length(geometry) > 50
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);
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CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen4_geometry_idx
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ON osm_transportation_merge_linestring_gen4 USING gist(geometry);
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CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen4_highway_partial_idx
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ON osm_transportation_merge_linestring_gen4(highway)
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WHERE highway IN ('motorway','trunk', 'primary');
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-- etldoc: osm_transportation_merge_linestring_gen4 -> osm_transportation_merge_linestring_gen5
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CREATE MATERIALIZED VIEW osm_transportation_merge_linestring_gen5 AS (
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SELECT ST_Simplify(geometry, 500) AS geometry, osm_id, highway, z_order
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FROM osm_transportation_merge_linestring_gen4
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WHERE highway IN ('motorway','trunk') AND ST_Length(geometry) > 100
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);
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CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen5_geometry_idx
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ON osm_transportation_merge_linestring_gen5 USING gist(geometry);
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CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen5_highway_partial_idx
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ON osm_transportation_merge_linestring_gen5(highway)
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WHERE highway IN ('motorway', 'trunk');
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-- etldoc: osm_transportation_merge_linestring_gen5 -> osm_transportation_merge_linestring_gen6
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CREATE MATERIALIZED VIEW osm_transportation_merge_linestring_gen6 AS (
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SELECT ST_Simplify(geometry, 1000) AS geometry, osm_id, highway, z_order
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FROM osm_transportation_merge_linestring_gen5
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WHERE highway IN ('motorway','trunk') AND ST_Length(geometry) > 500
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);
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CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen6_geometry_idx
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ON osm_transportation_merge_linestring_gen6 USING gist(geometry);
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CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen6_highway_partial_idx
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ON osm_transportation_merge_linestring_gen6(highway)
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WHERE highway IN ('motorway','trunk');
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-- etldoc: osm_transportation_merge_linestring_gen6 -> osm_transportation_merge_linestring_gen7
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CREATE MATERIALIZED VIEW osm_transportation_merge_linestring_gen7 AS (
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SELECT ST_Simplify(geometry, 2000) AS geometry, osm_id, highway, z_order
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FROM osm_transportation_merge_linestring_gen6
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WHERE highway IN ('motorway') AND ST_Length(geometry) > 1000
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);
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CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen7_geometry_idx
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ON osm_transportation_merge_linestring_gen7 USING gist(geometry);
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-- Handle updates
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CREATE SCHEMA IF NOT EXISTS transportation;
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CREATE TABLE IF NOT EXISTS transportation.updates(id serial primary key, t text, unique (t));
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CREATE OR REPLACE FUNCTION transportation.flag() RETURNS trigger AS $$
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BEGIN
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INSERT INTO transportation.updates(t) VALUES ('y') ON CONFLICT(t) DO NOTHING;
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RETURN null;
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END;
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$$ language plpgsql;
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CREATE OR REPLACE FUNCTION transportation.refresh() RETURNS trigger AS
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$BODY$
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BEGIN
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RAISE NOTICE 'Refresh transportation';
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REFRESH MATERIALIZED VIEW osm_transportation_merge_linestring;
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REFRESH MATERIALIZED VIEW osm_transportation_merge_linestring_gen3;
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REFRESH MATERIALIZED VIEW osm_transportation_merge_linestring_gen4;
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REFRESH MATERIALIZED VIEW osm_transportation_merge_linestring_gen5;
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REFRESH MATERIALIZED VIEW osm_transportation_merge_linestring_gen6;
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REFRESH MATERIALIZED VIEW osm_transportation_merge_linestring_gen7;
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DELETE FROM transportation.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_transportation
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AFTER INSERT OR UPDATE OR DELETE ON osm_highway_linestring
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FOR EACH STATEMENT
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EXECUTE PROCEDURE transportation.flag();
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CREATE CONSTRAINT TRIGGER trigger_refresh
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AFTER INSERT ON transportation.updates
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INITIALLY DEFERRED
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FOR EACH ROW
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EXECUTE PROCEDURE transportation.refresh();
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