ATTACH TABLE _ UUID '6c264270-5629-4fe6-9891-7cacdf00a686'
(
    `timeseries_name` String,
    `timeseries_key` UInt64,
    `timestamp` DateTime64(9, 'UTC'),
    `datum` Nullable(Int32)
)
ENGINE = MergeTree
ORDER BY (timeseries_name, timeseries_key, timestamp)
TTL toDateTime(timestamp) + toIntervalDay(30)
SETTINGS index_granularity = 8192
