CREATE DATABASE IF NOT EXISTS telecom;

CREATE TABLE IF NOT EXISTS telecom.cdr_records
(
    cdr_id UUID,
    raw_id String,

    msisdn String,
    imsi String,

    service_type LowCardinality(String),
    radio_access_type LowCardinality(String),
    cell_id LowCardinality(String),

    bytes_uploaded UInt64,
    bytes_downloaded UInt64,
    total_bytes UInt64,
    duration_seconds UInt32,

    session_start_time DateTime,
    session_end_time DateTime,

    source_ip IPv4,

    processed_at DateTime64(3) DEFAULT now()
)
ENGINE = ReplacingMergeTree(processed_at)
PARTITION BY toYYYYMM(session_start_time)
ORDER BY (
    service_type,
    radio_access_type,
    cell_id,
    session_start_time,
    msisdn,
    cdr_id
)
TTL session_start_time + INTERVAL 90 DAY
SETTINGS index_granularity = 8192;