83 lines
3.5 KiB
SQL
Executable File
83 lines
3.5 KiB
SQL
Executable File
-- Allow data loss (but not corruption) in the case of a power outage. This is okay because we need to re-run the script anyways.
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SET synchronous_commit TO OFF;
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-- Drop all primary keys and indexes to improve load speed.
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ALTER TABLE nodes DROP CONSTRAINT pk_nodes;
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ALTER TABLE ways DROP CONSTRAINT pk_ways;
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ALTER TABLE way_nodes DROP CONSTRAINT pk_way_nodes;
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ALTER TABLE relations DROP CONSTRAINT pk_relations;
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ALTER TABLE relation_members DROP CONSTRAINT pk_relation_members;
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DROP INDEX idx_nodes_geom;
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DROP INDEX idx_way_nodes_node_id;
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DROP INDEX idx_relation_members_member_id_and_type;
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DROP INDEX idx_ways_bbox;
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DROP INDEX idx_ways_linestring;
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-- Uncomment these out if bbox or linestring columns are needed and the COPY
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-- files do not include them. If you want these columns you should use the
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-- enableBboxBuilder or enableLinestringBuilder options to --write-pgsql-dump
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-- as they are faster than the following SQL.
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/*SELECT DropGeometryColumn('ways', 'bbox');
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SELECT DropGeometryColumn('ways', 'linestring');*/
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-- Import the table data from the data files using the fast COPY method.
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\copy users FROM 'users.txt'
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\copy nodes FROM 'nodes.txt'
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\copy ways FROM 'ways.txt'
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\copy way_nodes FROM 'way_nodes.txt'
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\copy relations FROM 'relations.txt'
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\copy relation_members FROM 'relation_members.txt'
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-- Add the primary keys and indexes back again (except the way bbox index).
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ALTER TABLE ONLY nodes ADD CONSTRAINT pk_nodes PRIMARY KEY (id);
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ALTER TABLE ONLY ways ADD CONSTRAINT pk_ways PRIMARY KEY (id);
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ALTER TABLE ONLY way_nodes ADD CONSTRAINT pk_way_nodes PRIMARY KEY (way_id, sequence_id);
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ALTER TABLE ONLY relations ADD CONSTRAINT pk_relations PRIMARY KEY (id);
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ALTER TABLE ONLY relation_members ADD CONSTRAINT pk_relation_members PRIMARY KEY (relation_id, sequence_id);
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CREATE INDEX idx_nodes_geom ON nodes USING gist (geom);
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CREATE INDEX idx_way_nodes_node_id ON way_nodes USING btree (node_id);
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CREATE INDEX idx_relation_members_member_id_and_type ON relation_members USING btree (member_id, member_type);
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ALTER TABLE ONLY nodes CLUSTER ON idx_nodes_geom;
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ALTER TABLE ONLY way_nodes CLUSTER ON pk_way_nodes;
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ALTER TABLE ONLY relation_members CLUSTER ON pk_relation_members;
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-- Uncomment these if bbox or linestring columns are needed and the COPY files do not include them.
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-- Update the bbox column of the way table.
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/*SELECT AddGeometryColumn('ways', 'bbox', 4326, 'GEOMETRY', 2);
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UPDATE ways SET bbox = (
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SELECT ST_Envelope(ST_Collect(geom))
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FROM nodes JOIN way_nodes ON way_nodes.node_id = nodes.id
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WHERE way_nodes.way_id = ways.id
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);*/
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-- Update the linestring column of the way table.
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/*SELECT AddGeometryColumn('ways', 'linestring', 4326, 'GEOMETRY', 2);
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UPDATE ways w SET linestring = (
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SELECT ST_MakeLine(c.geom) AS way_line FROM (
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SELECT n.geom AS geom
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FROM nodes n INNER JOIN way_nodes wn ON n.id = wn.node_id
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WHERE (wn.way_id = w.id) ORDER BY wn.sequence_id
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) c
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);*/
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-- Index the way bounding box column. If you don't have one of these columns, comment out the index
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CREATE INDEX idx_ways_bbox ON ways USING gist (bbox);
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CREATE INDEX idx_ways_linestring ON ways USING gist (linestring);
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ALTER TABLE ONLY ways CLUSTER ON idx_ways_bbox;
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ALTER TABLE ONLY ways CLUSTER ON idx_ways_linestring;
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-- Optional: CLUSTER imported tables. CLUSTER takes a significant amount of time to run and a
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-- significant amount of free disk space but speeds up some queries.
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--CLUSTER nodes;
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--CLUSTER ways;
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-- It is not necessary to CLUSTER way_nodes or relation_members after the initial load but you might want to do so later on
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-- Perform database maintenance due to large database changes.
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ANALYZE;
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