-- Heatmap raw material: normalized (0..1) spatial point per event, and the four new
-- event types (occupancy rules + near-miss). The chk_events_type constraint would REJECT
-- lone_worker/overcapacity/overstay/near_fall inserts on MySQL 8.0.16+ without this.
ALTER TABLE move_events
    ADD COLUMN spatial_x DOUBLE NULL AFTER metrics_json,
    ADD COLUMN spatial_y DOUBLE NULL AFTER spatial_x;

ALTER TABLE move_events DROP CHECK chk_events_type;
ALTER TABLE move_events ADD CONSTRAINT chk_events_type CHECK (event_type IN (
    'fall','no_motion','immobility','ghost','zone_warning',
    'zone_restricted','pinch','monitoring_degraded','device_fault',
    'lone_worker','overcapacity','overstay','near_fall'
));