ClickHouse/docs/ru/getting_started/example_datasets/ontime.rst

OnTime
======

Данный тест производительности был создан Вадимом Ткаченко, см:

* https://www.percona.com/blog/2009/10/02/analyzing-air-traffic-performance-with-infobright-and-monetdb/
* https://www.percona.com/blog/2009/10/26/air-traffic-queries-in-luciddb/
* https://www.percona.com/blog/2009/11/02/air-traffic-queries-in-infinidb-early-alpha/
* https://www.percona.com/blog/2014/04/21/using-apache-hadoop-and-impala-together-with-mysql-for-data-analysis/
* https://www.percona.com/blog/2016/01/07/apache-spark-with-air-ontime-performance-data/
* http://nickmakos.blogspot.ru/2012/08/analyzing-air-traffic-performance-with.html

Скачивание данных:

.. code-block:: bash

    for s in `seq 1987 2017`
    do
    for m in `seq 1 12`
    do
    wget http://transtats.bts.gov/PREZIP/On_Time_On_Time_Performance_${s}_${m}.zip
    done
    done

(из https://github.com/Percona-Lab/ontime-airline-performance/blob/master/download.sh )

Создание таблицы:

.. code-block:: sql

    CREATE TABLE `ontime` (
      `Year` UInt16,
      `Quarter` UInt8,
      `Month` UInt8,
      `DayofMonth` UInt8,
      `DayOfWeek` UInt8,
      `FlightDate` Date,
      `UniqueCarrier` FixedString(7),
      `AirlineID` Int32,
      `Carrier` FixedString(2),
      `TailNum` String,
      `FlightNum` String,
      `OriginAirportID` Int32,
      `OriginAirportSeqID` Int32,
      `OriginCityMarketID` Int32,
      `Origin` FixedString(5),
      `OriginCityName` String,
      `OriginState` FixedString(2),
      `OriginStateFips` String,
      `OriginStateName` String,
      `OriginWac` Int32,
      `DestAirportID` Int32,
      `DestAirportSeqID` Int32,
      `DestCityMarketID` Int32,
      `Dest` FixedString(5),
      `DestCityName` String,
      `DestState` FixedString(2),
      `DestStateFips` String,
      `DestStateName` String,
      `DestWac` Int32,
      `CRSDepTime` Int32,
      `DepTime` Int32,
      `DepDelay` Int32,
      `DepDelayMinutes` Int32,
      `DepDel15` Int32,
      `DepartureDelayGroups` String,
      `DepTimeBlk` String,
      `TaxiOut` Int32,
      `WheelsOff` Int32,
      `WheelsOn` Int32,
      `TaxiIn` Int32,
      `CRSArrTime` Int32,
      `ArrTime` Int32,
      `ArrDelay` Int32,
      `ArrDelayMinutes` Int32,
      `ArrDel15` Int32,
      `ArrivalDelayGroups` Int32,
      `ArrTimeBlk` String,
      `Cancelled` UInt8,
      `CancellationCode` FixedString(1),
      `Diverted` UInt8,
      `CRSElapsedTime` Int32,
      `ActualElapsedTime` Int32,
      `AirTime` Int32,
      `Flights` Int32,
      `Distance` Int32,
      `DistanceGroup` UInt8,
      `CarrierDelay` Int32,
      `WeatherDelay` Int32,
      `NASDelay` Int32,
      `SecurityDelay` Int32,
      `LateAircraftDelay` Int32,
      `FirstDepTime` String,
      `TotalAddGTime` String,
      `LongestAddGTime` String,
      `DivAirportLandings` String,
      `DivReachedDest` String,
      `DivActualElapsedTime` String,
      `DivArrDelay` String,
      `DivDistance` String,
      `Div1Airport` String,
      `Div1AirportID` Int32,
      `Div1AirportSeqID` Int32,
      `Div1WheelsOn` String,
      `Div1TotalGTime` String,
      `Div1LongestGTime` String,
      `Div1WheelsOff` String,
      `Div1TailNum` String,
      `Div2Airport` String,
      `Div2AirportID` Int32,
      `Div2AirportSeqID` Int32,
      `Div2WheelsOn` String,
      `Div2TotalGTime` String,
      `Div2LongestGTime` String,
      `Div2WheelsOff` String,
      `Div2TailNum` String,
      `Div3Airport` String,
      `Div3AirportID` Int32,
      `Div3AirportSeqID` Int32,
      `Div3WheelsOn` String,
      `Div3TotalGTime` String,
      `Div3LongestGTime` String,
      `Div3WheelsOff` String,
      `Div3TailNum` String,
      `Div4Airport` String,
      `Div4AirportID` Int32,
      `Div4AirportSeqID` Int32,
      `Div4WheelsOn` String,
      `Div4TotalGTime` String,
      `Div4LongestGTime` String,
      `Div4WheelsOff` String,
      `Div4TailNum` String,
      `Div5Airport` String,
      `Div5AirportID` Int32,
      `Div5AirportSeqID` Int32,
      `Div5WheelsOn` String,
      `Div5TotalGTime` String,
      `Div5LongestGTime` String,
      `Div5WheelsOff` String,
      `Div5TailNum` String
    ) ENGINE = MergeTree(FlightDate, (Year, FlightDate), 8192)

Загрузка данных:

.. code-block:: bash

    for i in *.zip; do echo $i; unzip -cq $i '*.csv' | sed 's/\.00//g' | clickhouse-client --host=example-perftest01j --query="INSERT INTO ontime FORMAT CSVWithNames"; done

Запросы:


Q0.

.. code-block:: sql

    select avg(c1) from (select Year, Month, count(*) as c1 from ontime group by Year, Month);

Q1. Количество полетов в день с 2000 по 2008 года

.. code-block:: sql

    SELECT DayOfWeek, count(*) AS c FROM ontime WHERE Year >= 2000 AND Year <= 2008 GROUP BY DayOfWeek ORDER BY c DESC;

Q2. Количество полетов, задержанных более чем на 10 минут, с группировкой по дням неделе, за 2000-2008 года

.. code-block:: sql

    SELECT DayOfWeek, count(*) AS c FROM ontime WHERE DepDelay>10 AND Year >= 2000 AND Year <= 2008 GROUP BY DayOfWeek ORDER BY c DESC

Q3. Количество задержек по аэропортам за 2000-2008

.. code-block:: sql

    SELECT Origin, count(*) AS c FROM ontime WHERE DepDelay>10 AND Year >= 2000 AND Year <= 2008 GROUP BY Origin ORDER BY c DESC LIMIT 10

Q4. Количество задержек по перевозчикам за 2007 год

.. code-block:: sql

    SELECT Carrier, count(*) FROM ontime WHERE DepDelay>10  AND Year = 2007 GROUP BY Carrier ORDER BY count(*) DESC

Q5. Процент задержек по перевозчикам за 2007 год

.. code-block:: sql

    SELECT Carrier, c, c2, c*1000/c2 as c3
    FROM
    (
        SELECT
            Carrier,
            count(*) AS c
        FROM ontime
        WHERE DepDelay>10
            AND Year=2007
        GROUP BY Carrier
    )
    ANY INNER JOIN
    (
        SELECT
            Carrier,
            count(*) AS c2
        FROM ontime
        WHERE Year=2007
        GROUP BY Carrier
    ) USING Carrier
    ORDER BY c3 DESC;

Более оптимальная версия того же запроса:

.. code-block:: sql

    SELECT Carrier, avg(DepDelay > 10) * 1000 AS c3 FROM ontime WHERE Year = 2007 GROUP BY Carrier ORDER BY Carrier

Q6. Предыдущий запрос за более широкий диапазон лет, 2000-2008

.. code-block:: sql

    SELECT Carrier, c, c2, c*1000/c2 as c3
    FROM
    (
        SELECT
            Carrier,
            count(*) AS c
        FROM ontime
        WHERE DepDelay>10
            AND Year >= 2000 AND Year <= 2008
        GROUP BY Carrier
    )
    ANY INNER JOIN
    (
        SELECT
            Carrier,
            count(*) AS c2
        FROM ontime
        WHERE Year >= 2000 AND Year <= 2008
        GROUP BY Carrier
    ) USING Carrier
    ORDER BY c3 DESC;

Более оптимальная версия того же запроса:

.. code-block:: sql

    SELECT Carrier, avg(DepDelay > 10) * 1000 AS c3 FROM ontime WHERE Year >= 2000 AND Year <= 2008 GROUP BY Carrier ORDER BY Carrier

Q7. Процент полетов, задержанных на более 10 минут, в разбивке по годам

.. code-block:: sql

    SELECT Year, c1/c2
    FROM
    (
        select
            Year,
            count(*)*1000 as c1
        from ontime
        WHERE DepDelay>10
        GROUP BY Year
    )
    ANY INNER JOIN
    (
        select
            Year,
            count(*) as c2
        from ontime
        GROUP BY Year
    ) USING (Year)
    ORDER BY Year

Более оптимальная версия того же запроса:

.. code-block:: sql

    SELECT Year, avg(DepDelay > 10) FROM ontime GROUP BY Year ORDER BY Year

Q8. Самые популярные направления по количеству напрямую соединенных городов для различных диапазонов лет

.. code-block:: sql

    SELECT DestCityName, uniqExact(OriginCityName) AS u FROM ontime WHERE Year >= 2000 and Year <= 2010 GROUP BY DestCityName ORDER BY u DESC LIMIT 10;

Q9.

.. code-block:: sql

    select Year, count(*) as c1 from ontime group by Year;

Q10.

.. code-block:: sql

    select
       min(Year), max(Year), Carrier, count(*) as cnt,
       sum(ArrDelayMinutes>30) as flights_delayed,
       round(sum(ArrDelayMinutes>30)/count(*),2) as rate
    FROM ontime
    WHERE
       DayOfWeek not in (6,7) and OriginState not in ('AK', 'HI', 'PR', 'VI')
       and DestState not in ('AK', 'HI', 'PR', 'VI')
       and FlightDate < '2010-01-01'
    GROUP by Carrier
    HAVING cnt > 100000 and max(Year) > 1990
    ORDER by rate DESC
    LIMIT 1000;

Бонус:

.. code-block:: sql

    SELECT avg(cnt) FROM (SELECT Year,Month,count(*) AS cnt FROM ontime WHERE DepDel15=1 GROUP BY Year,Month)

    select avg(c1) from (select Year,Month,count(*) as c1 from ontime group by Year,Month)

    SELECT DestCityName, uniqExact(OriginCityName) AS u FROM ontime GROUP BY DestCityName ORDER BY u DESC LIMIT 10;

    SELECT OriginCityName, DestCityName, count() AS c FROM ontime GROUP BY OriginCityName, DestCityName ORDER BY c DESC LIMIT 10;

    SELECT OriginCityName, count() AS c FROM ontime GROUP BY OriginCityName ORDER BY c DESC LIMIT 10;