Back to being a hypertable

supabase/migrations/20240410220437_restore-hypertable.sql

@@ -0,0 +1,20 @@
+-- we areno longer using trigger.dev for sanity checking positions in
+-- a reatime manner, so restore the hypertable.
+delete from raw_bus_positions where id in (select raw_pos_id from potential_arrivals);
+drop table potential_arrivals cascade;
+
+CREATE TABLE potential_arrivals(
+  id BIGINT GENERATED ALWAYS AS IDENTITY,
+  raw_pos_id BIGINT NOT NULL,
+  bus_id text NOT NULL,
+  bus_coords GEOGRAPHY(Point, 4326) NOT NULL,
+  measured_at TIMESTAMP WITH TIME ZONE NOT NULL,
+  stop_id bigint NOT NULL,
+  distance decimal NOT NULL
+);
+
+SELECT create_hypertable('potential_arrivals', 'measured_at', chunk_time_interval => INTERVAL '10 minutes');
+
+CREATE INDEX potential_arrives_raw_pos_id ON potential_arrivals (raw_pos_id);
+CREATE INDEX potential_arrivals_measures ON potential_arrivals (bus_id, measured_at DESC);
+CREATE INDEX potential_arrivals_spatial ON potential_arrivals USING GIST (bus_coords);