cameleer-server/cameleer3-server-app/src/main/resources/clickhouse/07-stats-rollup.sql

-- Pre-aggregated 5-minute stats rollup for route executions.
-- Uses AggregatingMergeTree with -State/-Merge combinators so intermediate
-- aggregates can be merged across arbitrary time windows and dimensions.

-- Drop existing objects to allow schema changes (MV must be dropped before table)
DROP VIEW IF EXISTS route_execution_stats_5m_mv;
DROP TABLE IF EXISTS route_execution_stats_5m;

CREATE TABLE route_execution_stats_5m (
    bucket            DateTime('UTC'),
    route_id          LowCardinality(String),
    agent_id          LowCardinality(String),
    total_count       AggregateFunction(count),
    failed_count      AggregateFunction(countIf, UInt8),
    duration_sum      AggregateFunction(sum, UInt64),
    p99_duration      AggregateFunction(quantileTDigest(0.99), UInt64)
)
ENGINE = AggregatingMergeTree()
PARTITION BY toYYYYMMDD(bucket)
ORDER BY (agent_id, route_id, bucket)
TTL bucket + toIntervalDay(30)
SETTINGS ttl_only_drop_parts = 1;

CREATE MATERIALIZED VIEW route_execution_stats_5m_mv
TO route_execution_stats_5m
AS SELECT
    toStartOfFiveMinutes(start_time) AS bucket,
    route_id,
    agent_id,
    countState()                            AS total_count,
    countIfState(status = 'FAILED')         AS failed_count,
    sumState(duration_ms)                   AS duration_sum,
    quantileTDigestState(0.99)(duration_ms) AS p99_duration
FROM route_executions
GROUP BY bucket, route_id, agent_id;