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Diff update osm transportation name network linestring (#996)

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Replacing materialized view by a tables with update from trigger on change only.

Differential update of `osm_transportation_name_linestring`, `osm_transportation_name_linestring` and `osm_transportation_name_linestring_genX`).

At the end of the transaction the dependent rows are updated.

The goal is to update more quickly the content of derivated tables by just updating the changing content. It replaces the update of materialized view because their need a full recompute (with lock issue).

It is the last part of the replacement of materialized view for the transportation layer.

It addresses #814 and a part of #809.
This commit is contained in:
Frédéric Rodrigo
2020-09-28 14:56:10 +02:00
committed by GitHub
parent 47cdfc2c8b
commit 8bb77b67a1
4 changed files with 310 additions and 49 deletions
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67
layers/transportation_name/update_route_member.sql
View File

@@ -3,24 +3,24 @@ SELECT ST_Buffer(geometry, 10000)
FROM ne_10m_admin_0_countries
WHERE iso_a2 = 'GB';
-- create GBR relations (so we can use it in the same way as other relations)
CREATE OR REPLACE FUNCTION update_gbr_route_members() RETURNS void AS
$$
BEGIN
DELETE FROM osm_route_member WHERE network IN ('omt-gb-motorway', 'omt-gb-trunk');
INSERT INTO osm_route_member (osm_id, member, ref, network)
SELECT 0,
osm_id,
substring(ref FROM E'^[AM][0-9AM()]+'),
CASE WHEN highway = 'motorway' THEN 'omt-gb-motorway' ELSE 'omt-gb-trunk' END
FROM osm_highway_linestring
WHERE length(ref) > 0
AND ST_Intersects(geometry, (SELECT * FROM ne_10m_admin_0_bg_buffer))
AND highway IN ('motorway', 'trunk');
END;
$$ LANGUAGE plpgsql;
CREATE OR REPLACE VIEW gbr_route_members_view AS
SELECT 0,
osm_id,
substring(ref FROM E'^[AM][0-9AM()]+'),
CASE WHEN highway = 'motorway' THEN 'omt-gb-motorway' ELSE 'omt-gb-trunk' END
FROM osm_highway_linestring
WHERE length(ref) > 0
AND ST_Intersects(geometry, (SELECT * FROM ne_10m_admin_0_bg_buffer))
AND highway IN ('motorway', 'trunk')
;
-- Create GBR relations (so we can use it in the same way as other relations)
DELETE
FROM osm_route_member
WHERE network IN ('omt-gb-motorway', 'omt-gb-trunk');
-- etldoc: osm_highway_linestring -> osm_route_member
INSERT INTO osm_route_member (osm_id, member, ref, network)
SELECT *
FROM gbr_route_members_view;
CREATE OR REPLACE FUNCTION osm_route_member_network_type(network text, name text, ref text) RETURNS route_network_type AS
$$
@@ -52,15 +52,36 @@ $$ LANGUAGE sql IMMUTABLE
PARALLEL SAFE;
-- etldoc: osm_route_member -> osm_route_member
-- see http://wiki.openstreetmap.org/wiki/Relation:route#Road_routes
UPDATE osm_route_member
SET network_type = osm_route_member_network_type(network, name, ref)
WHERE network != ''
AND network_type != osm_route_member_network_type(network, name, ref)
;
CREATE OR REPLACE FUNCTION update_osm_route_member() RETURNS void AS
$$
BEGIN
PERFORM update_gbr_route_members();
DELETE
FROM osm_route_member AS r
USING
transportation_name.network_changes AS c
WHERE network IN ('omt-gb-motorway', 'omt-gb-trunk')
AND r.osm_id = c.osm_id;
-- see http://wiki.openstreetmap.org/wiki/Relation:route#Road_routes
UPDATE osm_route_member
SET network_type = osm_route_member_network_type(network, name, ref);
INSERT INTO osm_route_member (osm_id, member, ref, network)
SELECT r.*
FROM gbr_route_members_view AS r
JOIN transportation_name.network_changes AS c ON
r.osm_id = c.osm_id;
UPDATE
osm_route_member AS r
SET network_type = osm_route_member_network_type(network, name, ref)
FROM transportation_name.network_changes AS c
WHERE network != ''
AND network_type != osm_route_member_network_type(network, name, ref)
AND r.member = c.osm_id;
END;
$$ LANGUAGE plpgsql;
@@ -69,6 +90,4 @@ CREATE INDEX IF NOT EXISTS osm_route_member_member_idx ON osm_route_member ("mem
CREATE INDEX IF NOT EXISTS osm_route_member_name_idx ON osm_route_member ("name");
CREATE INDEX IF NOT EXISTS osm_route_member_ref_idx ON osm_route_member ("ref");
SELECT update_osm_route_member();
CREATE INDEX IF NOT EXISTS osm_route_member_network_type_idx ON osm_route_member ("network_type");