ATTACH TABLE _ UUID '85ad771f-3c4d-41fe-a316-82ee7d8b53db'
(
    `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
