DROP INDEX metrics_keys_key_idx;
DROP TABLE metric_keys;
DROP TABLE metrics;
CREATE TABLE IF NOT EXISTS metrics (
                                       id integer NOT NULL primary key autoincrement,
                                       timestamp real NOT NULL,
                                       key text NOT NULL,
                                       value integer NOT NULL
);
CREATE INDEX IF NOT EXISTS metrics_timestamp_idx ON metrics (timestamp);
CREATE INDEX IF NOT EXISTS metrics_key_idx ON metrics (key);