-- Enable TimescaleDB so the app's climate record lives in hypertables
-- (climate_history) instead of parquet files. The stock timescale/timescaledb
-- image already preloads the extension (shared_preload_libraries=timescaledb);
-- this just runs CREATE EXTENSION on first cluster init.
--
-- This runs once, on first cluster init (empty PGDATA), from
-- /docker-entrypoint-initdb.d. Because the compose `db` service keeps its data on
-- a persistent named volume, init scripts do NOT re-run on an existing database.
-- Alembic (backend/alembic) also runs `CREATE EXTENSION IF NOT EXISTS timescaledb`
-- at app boot, so an existing volume gets it there; to enable it by hand instead:
--
--     docker compose exec db psql -U thermograph -d thermograph \
--         -c 'CREATE EXTENSION IF NOT EXISTS timescaledb;'
CREATE EXTENSION IF NOT EXISTS timescaledb;