125 lines
5.3 KiB
SQL
125 lines
5.3 KiB
SQL
-- Enable PostGIS
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CREATE EXTENSION IF NOT EXISTS postgis;
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CREATE EXTENSION IF NOT EXISTS postgis_topology;
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CREATE EXTENSION IF NOT EXISTS pg_trgm;
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-- ─── Cities ──────────────────────────────────────────────────────────────────
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CREATE TABLE IF NOT EXISTS cities (
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slug TEXT PRIMARY KEY,
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name TEXT NOT NULL,
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country_code CHAR(2) NOT NULL DEFAULT '',
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geofabrik_url TEXT NOT NULL,
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bbox geometry(Polygon, 4326),
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resolution_m INTEGER NOT NULL DEFAULT 200,
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status TEXT NOT NULL DEFAULT 'empty'
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CHECK (status IN ('empty','pending','processing','ready','error')),
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error_message TEXT,
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last_ingested TIMESTAMPTZ,
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created_at TIMESTAMPTZ NOT NULL DEFAULT now()
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);
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-- Migration for existing databases
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ALTER TABLE cities ADD COLUMN IF NOT EXISTS resolution_m INTEGER NOT NULL DEFAULT 200;
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CREATE INDEX IF NOT EXISTS idx_cities_bbox ON cities USING GIST (bbox);
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-- ─── Raw POIs (created and managed by osm2pgsql flex output) ─────────────────
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-- osm2pgsql --drop recreates this table on each ingest using the Lua script.
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-- Columns: osm_id (bigint), osm_type (char), city_slug, category, subcategory,
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-- name, tags, geom — no auto-generated id column.
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-- This CREATE TABLE IF NOT EXISTS is a no-op after the first osm2pgsql run.
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CREATE TABLE IF NOT EXISTS raw_pois (
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osm_id BIGINT NOT NULL,
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osm_type CHAR(1) NOT NULL,
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city_slug TEXT NOT NULL,
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category TEXT NOT NULL,
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subcategory TEXT NOT NULL,
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name TEXT,
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tags JSONB,
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geom geometry(Point, 4326) NOT NULL
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);
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CREATE INDEX IF NOT EXISTS idx_raw_pois_city_cat
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ON raw_pois (city_slug, category);
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CREATE INDEX IF NOT EXISTS idx_raw_pois_geom
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ON raw_pois USING GIST (geom);
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CREATE INDEX IF NOT EXISTS idx_raw_pois_name
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ON raw_pois USING GIN (name gin_trgm_ops)
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WHERE name IS NOT NULL;
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-- ─── Grid points ─────────────────────────────────────────────────────────────
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CREATE TABLE IF NOT EXISTS grid_points (
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id BIGSERIAL PRIMARY KEY,
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city_slug TEXT NOT NULL REFERENCES cities(slug) ON DELETE CASCADE,
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geom geometry(Point, 4326) NOT NULL,
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grid_x INTEGER NOT NULL,
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grid_y INTEGER NOT NULL,
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UNIQUE (city_slug, grid_x, grid_y)
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);
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CREATE INDEX IF NOT EXISTS idx_grid_city ON grid_points (city_slug);
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CREATE INDEX IF NOT EXISTS idx_grid_geom ON grid_points USING GIST (geom);
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-- ─── Pre-computed accessibility scores ───────────────────────────────────────
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CREATE TABLE IF NOT EXISTS grid_scores (
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grid_point_id BIGINT NOT NULL REFERENCES grid_points(id) ON DELETE CASCADE,
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category TEXT NOT NULL,
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travel_mode TEXT NOT NULL CHECK (travel_mode IN ('walking','cycling','driving')),
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threshold_min INTEGER NOT NULL,
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profile TEXT NOT NULL DEFAULT 'universal',
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nearest_poi_id BIGINT,
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distance_m FLOAT,
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travel_time_s FLOAT,
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score FLOAT NOT NULL CHECK (score >= 0 AND score <= 1),
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computed_at TIMESTAMPTZ NOT NULL DEFAULT now(),
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PRIMARY KEY (grid_point_id, category, travel_mode, threshold_min, profile)
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);
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-- Migration for existing databases (adds profile column and rebuilds PK)
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ALTER TABLE grid_scores ADD COLUMN IF NOT EXISTS profile TEXT NOT NULL DEFAULT 'universal';
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CREATE INDEX IF NOT EXISTS idx_grid_scores_lookup
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ON grid_scores (grid_point_id, travel_mode, threshold_min, profile);
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-- ─── Nearest POI per subcategory per grid point ───────────────────────────────
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-- Populated by compute-scores job. Stores the nearest (by routing time) POI for
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-- each subcategory at each grid point, for each travel mode. Threshold-independent.
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CREATE TABLE IF NOT EXISTS grid_poi_details (
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grid_point_id BIGINT NOT NULL REFERENCES grid_points(id) ON DELETE CASCADE,
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category TEXT NOT NULL,
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subcategory TEXT NOT NULL,
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travel_mode TEXT NOT NULL,
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nearest_poi_id BIGINT,
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nearest_poi_name TEXT,
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distance_m FLOAT,
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travel_time_s FLOAT,
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computed_at TIMESTAMPTZ NOT NULL DEFAULT now(),
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PRIMARY KEY (grid_point_id, category, subcategory, travel_mode)
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);
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CREATE INDEX IF NOT EXISTS idx_grid_poi_details_lookup
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ON grid_poi_details (grid_point_id, travel_mode);
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-- ─── Isochrone cache ──────────────────────────────────────────────────────────
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CREATE TABLE IF NOT EXISTS isochrone_cache (
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id BIGSERIAL PRIMARY KEY,
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origin_geom geometry(Point, 4326) NOT NULL,
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travel_mode TEXT NOT NULL,
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contours_min INTEGER[] NOT NULL,
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result JSONB NOT NULL,
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created_at TIMESTAMPTZ NOT NULL DEFAULT now()
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);
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CREATE INDEX IF NOT EXISTS idx_isochrone_origin
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ON isochrone_cache USING GIST (origin_geom);
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CREATE INDEX IF NOT EXISTS idx_isochrone_created
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ON isochrone_cache (created_at);
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-- Auto-expire isochrone cache entries older than 30 days
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-- (handled by periodic cleanup or TTL logic in app)
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