884a8d2a63
* `mv_park_nearest_poi` — for each IndustrialPark, the 3 nearest POI of six priority categories (HOSPITAL/BANK/GAS/BUS/METRO/POLICE) within 5km. Refreshed weekly. Pre-aggregated 6,513 rows from the live catalog so the KCN sidebar can render in <50ms instead of running ST_Distance for every page hit. * `mv_poi_density_by_province` — count of POI per (province, category) for analytics heatmaps. * `OsmSyncService.refreshMaterializedViews()` calls `REFRESH MATERIALIZED VIEW CONCURRENTLY` so reads aren't blocked. * New cron entry `weeklyRefreshViews` (Sun 04:00 ICT) and admin endpoint `POST /admin/osm/refresh-views` for on-demand refresh. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
40 lines
1.6 KiB
SQL
40 lines
1.6 KiB
SQL
-- Phase 6: cached proximity scores for fast filter / sort.
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-- Refreshed by `OsmRefreshViewsCron` (Sun 03:00 ICT) and on admin-trigger.
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-- For each industrial park, the 3 nearest POI of each priority category.
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CREATE MATERIALIZED VIEW IF NOT EXISTS "mv_park_nearest_poi" AS
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SELECT
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p.id AS park_id,
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poi.category::text AS category,
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poi.id AS poi_id,
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poi.name AS poi_name,
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ROUND(ST_Distance(p.location::geography, poi.location::geography)::numeric, 0)::int AS distance_m,
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ROW_NUMBER() OVER (
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PARTITION BY p.id, poi.category
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ORDER BY ST_Distance(p.location::geography, poi.location::geography)
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) AS rank
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FROM "IndustrialPark" p
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CROSS JOIN LATERAL (
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SELECT id, name, category, location
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FROM "Poi"
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WHERE "isPublic" = true
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AND category::text IN ('HOSPITAL','BANK','GAS_STATION','BUS_STATION','METRO_STATION','POLICE')
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AND ST_DWithin(location::geography, p.location::geography, 5000)
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) poi;
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CREATE INDEX IF NOT EXISTS "mv_park_nearest_poi_park_cat" ON "mv_park_nearest_poi"(park_id, category, rank);
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CREATE UNIQUE INDEX IF NOT EXISTS "mv_park_nearest_poi_uq" ON "mv_park_nearest_poi"(park_id, category, poi_id);
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-- Per-province POI density (count by category) for analytics heatmaps.
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CREATE MATERIALIZED VIEW IF NOT EXISTS "mv_poi_density_by_province" AS
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SELECT
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"provinceCode",
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category::text AS category,
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COUNT(*)::int AS poi_count
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FROM "Poi"
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WHERE "isPublic" = true
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AND "provinceCode" IS NOT NULL
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GROUP BY "provinceCode", category;
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CREATE INDEX IF NOT EXISTS "mv_poi_density_by_province_idx" ON "mv_poi_density_by_province"("provinceCode", category);
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