171 lines
5.3 KiB
PL/PgSQL
171 lines
5.3 KiB
PL/PgSQL
-- Database creation script for the snapshot PostgreSQL schema.
|
|
|
|
-- Drop all tables if they exist.
|
|
DROP TABLE IF EXISTS actions;
|
|
DROP TABLE IF EXISTS users;
|
|
DROP TABLE IF EXISTS nodes;
|
|
DROP TABLE IF EXISTS ways;
|
|
DROP TABLE IF EXISTS way_nodes;
|
|
DROP TABLE IF EXISTS relations;
|
|
DROP TABLE IF EXISTS relation_members;
|
|
DROP TABLE IF EXISTS schema_info;
|
|
|
|
-- Drop all stored procedures if they exist.
|
|
DROP FUNCTION IF EXISTS osmosisUpdate();
|
|
|
|
|
|
-- Create a table which will contain a single row defining the current schema version.
|
|
CREATE TABLE schema_info (
|
|
version integer NOT NULL
|
|
);
|
|
|
|
|
|
-- Create a table for users.
|
|
CREATE TABLE users (
|
|
id int NOT NULL,
|
|
name text NOT NULL
|
|
);
|
|
|
|
|
|
-- Create a table for nodes.
|
|
CREATE TABLE nodes (
|
|
id bigint NOT NULL,
|
|
version int NOT NULL,
|
|
user_id int NOT NULL,
|
|
tstamp timestamp without time zone NOT NULL,
|
|
changeset_id bigint NOT NULL,
|
|
tags hstore
|
|
);
|
|
-- Add a postgis point column holding the location of the node.
|
|
SELECT AddGeometryColumn('nodes', 'geom', 4326, 'POINT', 2);
|
|
|
|
|
|
-- Create a table for ways.
|
|
CREATE TABLE ways (
|
|
id bigint NOT NULL,
|
|
version int NOT NULL,
|
|
user_id int NOT NULL,
|
|
tstamp timestamp without time zone NOT NULL,
|
|
changeset_id bigint NOT NULL,
|
|
tags hstore,
|
|
nodes bigint[]
|
|
);
|
|
|
|
|
|
-- Create a table for representing way to node relationships.
|
|
CREATE TABLE way_nodes (
|
|
way_id bigint NOT NULL,
|
|
node_id bigint NOT NULL,
|
|
sequence_id int NOT NULL
|
|
);
|
|
|
|
|
|
-- Create a table for relations.
|
|
CREATE TABLE relations (
|
|
id bigint NOT NULL,
|
|
version int NOT NULL,
|
|
user_id int NOT NULL,
|
|
tstamp timestamp without time zone NOT NULL,
|
|
changeset_id bigint NOT NULL,
|
|
tags hstore
|
|
);
|
|
|
|
-- Create a table for representing relation member relationships.
|
|
CREATE TABLE relation_members (
|
|
relation_id bigint NOT NULL,
|
|
member_id bigint NOT NULL,
|
|
member_type character(1) NOT NULL,
|
|
member_role text NOT NULL,
|
|
sequence_id int NOT NULL
|
|
);
|
|
|
|
|
|
-- Configure the schema version.
|
|
INSERT INTO schema_info (version) VALUES (6);
|
|
|
|
|
|
-- Add primary keys to tables.
|
|
ALTER TABLE ONLY schema_info ADD CONSTRAINT pk_schema_info PRIMARY KEY (version);
|
|
|
|
ALTER TABLE ONLY users ADD CONSTRAINT pk_users PRIMARY KEY (id);
|
|
|
|
ALTER TABLE ONLY nodes ADD CONSTRAINT pk_nodes PRIMARY KEY (id);
|
|
|
|
ALTER TABLE ONLY ways ADD CONSTRAINT pk_ways PRIMARY KEY (id);
|
|
|
|
ALTER TABLE ONLY way_nodes ADD CONSTRAINT pk_way_nodes PRIMARY KEY (way_id, sequence_id);
|
|
|
|
ALTER TABLE ONLY relations ADD CONSTRAINT pk_relations PRIMARY KEY (id);
|
|
|
|
ALTER TABLE ONLY relation_members ADD CONSTRAINT pk_relation_members PRIMARY KEY (relation_id, sequence_id);
|
|
|
|
|
|
-- Add indexes to tables.
|
|
CREATE INDEX idx_nodes_geom ON nodes USING gist (geom);
|
|
|
|
CREATE INDEX idx_way_nodes_node_id ON way_nodes USING btree (node_id);
|
|
|
|
CREATE INDEX idx_relation_members_member_id_and_type ON relation_members USING btree (member_id, member_type);
|
|
|
|
|
|
-- Set to cluster nodes by geographical location.
|
|
ALTER TABLE ONLY nodes CLUSTER ON idx_nodes_geom;
|
|
|
|
-- Set to cluster the tables showing relationship by parent ID and sequence
|
|
ALTER TABLE ONLY way_nodes CLUSTER ON pk_way_nodes;
|
|
ALTER TABLE ONLY relation_members CLUSTER ON pk_relation_members;
|
|
|
|
-- There are no sensible CLUSTER orders for users or relations.
|
|
-- Depending on geometry columns different clustings of ways may be desired.
|
|
|
|
-- Create the function that provides "unnest" functionality while remaining compatible with 8.3.
|
|
CREATE OR REPLACE FUNCTION unnest_bbox_way_nodes() RETURNS void AS $$
|
|
DECLARE
|
|
previousId ways.id%TYPE;
|
|
currentId ways.id%TYPE;
|
|
result bigint[];
|
|
wayNodeRow way_nodes%ROWTYPE;
|
|
wayNodes ways.nodes%TYPE;
|
|
BEGIN
|
|
FOR wayNodes IN SELECT bw.nodes FROM bbox_ways bw LOOP
|
|
FOR i IN 1 .. array_upper(wayNodes, 1) LOOP
|
|
INSERT INTO bbox_way_nodes (id) VALUES (wayNodes[i]);
|
|
END LOOP;
|
|
END LOOP;
|
|
END;
|
|
$$ LANGUAGE plpgsql;
|
|
|
|
|
|
-- Create customisable hook function that is called within the replication update transaction.
|
|
CREATE FUNCTION osmosisUpdate() RETURNS void AS $$
|
|
DECLARE
|
|
BEGIN
|
|
END;
|
|
$$ LANGUAGE plpgsql;
|
|
|
|
-- Manually set statistics for the way_nodes and relation_members table
|
|
-- Postgres gets horrible counts of distinct values by sampling random pages
|
|
-- and can be off by an 1-2 orders of magnitude
|
|
|
|
-- Size of the ways table / size of the way_nodes table
|
|
ALTER TABLE way_nodes ALTER COLUMN way_id SET (n_distinct = -0.08);
|
|
|
|
-- Size of the nodes table / size of the way_nodes table * 0.998
|
|
-- 0.998 is a factor for nodes not in ways
|
|
ALTER TABLE way_nodes ALTER COLUMN node_id SET (n_distinct = -0.83);
|
|
|
|
-- API allows a maximum of 2000 nodes/way. Unlikely to impact query plans.
|
|
ALTER TABLE way_nodes ALTER COLUMN sequence_id SET (n_distinct = 2000);
|
|
|
|
-- Size of the relations table / size of the relation_members table
|
|
ALTER TABLE relation_members ALTER COLUMN relation_id SET (n_distinct = -0.09);
|
|
|
|
-- Based on June 2013 data
|
|
ALTER TABLE relation_members ALTER COLUMN member_id SET (n_distinct = -0.62);
|
|
|
|
-- Based on June 2013 data. Unlikely to impact query plans.
|
|
ALTER TABLE relation_members ALTER COLUMN member_role SET (n_distinct = 6500);
|
|
|
|
-- Based on June 2013 data. Unlikely to impact query plans.
|
|
ALTER TABLE relation_members ALTER COLUMN sequence_id SET (n_distinct = 10000);
|