8bb77b67a1
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.
94 lines
3.9 KiB
PL/PgSQL
94 lines
3.9 KiB
PL/PgSQL
CREATE TABLE IF NOT EXISTS ne_10m_admin_0_bg_buffer AS
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SELECT ST_Buffer(geometry, 10000)
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FROM ne_10m_admin_0_countries
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WHERE iso_a2 = 'GB';
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CREATE OR REPLACE VIEW gbr_route_members_view AS
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SELECT 0,
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osm_id,
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substring(ref FROM E'^[AM][0-9AM()]+'),
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CASE WHEN highway = 'motorway' THEN 'omt-gb-motorway' ELSE 'omt-gb-trunk' END
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FROM osm_highway_linestring
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WHERE length(ref) > 0
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AND ST_Intersects(geometry, (SELECT * FROM ne_10m_admin_0_bg_buffer))
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AND highway IN ('motorway', 'trunk')
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;
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-- Create GBR relations (so we can use it in the same way as other relations)
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DELETE
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FROM osm_route_member
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WHERE network IN ('omt-gb-motorway', 'omt-gb-trunk');
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-- etldoc: osm_highway_linestring -> osm_route_member
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INSERT INTO osm_route_member (osm_id, member, ref, network)
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SELECT *
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FROM gbr_route_members_view;
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CREATE OR REPLACE FUNCTION osm_route_member_network_type(network text, name text, ref text) RETURNS route_network_type AS
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$$
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SELECT CASE
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WHEN network = 'US:I' THEN 'us-interstate'::route_network_type
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WHEN network = 'US:US' THEN 'us-highway'::route_network_type
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WHEN network LIKE 'US:__' THEN 'us-state'::route_network_type
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-- https://en.wikipedia.org/wiki/Trans-Canada_Highway
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-- TODO: improve hierarchical queries using
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-- http://www.openstreetmap.org/relation/1307243
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-- however the relation does not cover the whole Trans-Canada_Highway
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WHEN
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(network = 'CA:transcanada') OR
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(network = 'CA:BC:primary' AND ref IN ('16')) OR
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(name = 'Yellowhead Highway (AB)' AND ref IN ('16')) OR
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(network = 'CA:SK:primary' AND ref IN ('16')) OR
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(network = 'CA:ON:primary' AND ref IN ('17', '417')) OR
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(name = 'Route Transcanadienne') OR
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(network = 'CA:NB:primary' AND ref IN ('2', '16')) OR
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(network = 'CA:PE' AND ref IN ('1')) OR
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(network = 'CA:NS' AND ref IN ('104', '105')) OR
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(network = 'CA:NL:R' AND ref IN ('1')) OR
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(name = 'Trans-Canada Highway')
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THEN 'ca-transcanada'::route_network_type
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WHEN network = 'omt-gb-motorway' THEN 'gb-motorway'::route_network_type
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WHEN network = 'omt-gb-trunk' THEN 'gb-trunk'::route_network_type
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END;
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$$ LANGUAGE sql IMMUTABLE
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PARALLEL SAFE;
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-- etldoc: osm_route_member -> osm_route_member
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-- see http://wiki.openstreetmap.org/wiki/Relation:route#Road_routes
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UPDATE osm_route_member
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SET network_type = osm_route_member_network_type(network, name, ref)
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WHERE network != ''
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AND network_type != osm_route_member_network_type(network, name, ref)
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;
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CREATE OR REPLACE FUNCTION update_osm_route_member() RETURNS void AS
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$$
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BEGIN
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DELETE
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FROM osm_route_member AS r
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USING
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transportation_name.network_changes AS c
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WHERE network IN ('omt-gb-motorway', 'omt-gb-trunk')
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AND r.osm_id = c.osm_id;
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INSERT INTO osm_route_member (osm_id, member, ref, network)
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SELECT r.*
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FROM gbr_route_members_view AS r
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JOIN transportation_name.network_changes AS c ON
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r.osm_id = c.osm_id;
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UPDATE
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osm_route_member AS r
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SET network_type = osm_route_member_network_type(network, name, ref)
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FROM transportation_name.network_changes AS c
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WHERE network != ''
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AND network_type != osm_route_member_network_type(network, name, ref)
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AND r.member = c.osm_id;
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END;
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$$ LANGUAGE plpgsql;
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CREATE INDEX IF NOT EXISTS osm_route_member_network_idx ON osm_route_member ("network");
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CREATE INDEX IF NOT EXISTS osm_route_member_member_idx ON osm_route_member ("member");
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CREATE INDEX IF NOT EXISTS osm_route_member_name_idx ON osm_route_member ("name");
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CREATE INDEX IF NOT EXISTS osm_route_member_ref_idx ON osm_route_member ("ref");
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CREATE INDEX IF NOT EXISTS osm_route_member_network_type_idx ON osm_route_member ("network_type");
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