クエリサービス（Data Distiller）とデータセットの書き出し

$$ BEGIN
   -- Disable dropping system columns
   set drop_system_columns=false;

   -- Initialize variables
   SET @last_updated_timestamp = SELECT CURRENT_TIMESTAMP;

   -- Get the last processed batch ingestion time
   SET @from_batch_ingestion_time = SELECT coalesce(last_batch_ingestion_time, 'HEAD')
      FROM checkpoint_log a
      JOIN (
            SELECT MAX(process_timestamp) AS process_timestamp
            FROM checkpoint_log
            WHERE process_name = 'data_feed'
            AND process_status = 'SUCCESSFUL'
      ) b
      ON a.process_timestamp = b.process_timestamp;

   -- Get the last batch ingestion time
   SET @to_batch_ingestion_time = SELECT MAX(_acp_system_metadata.ingestTime)
      FROM events_dataset;

   -- Sessionize the data and insert into data_feed.
   INSERT INTO data_feed
   SELECT *
   FROM (
      SELECT
            userIdentity,
            timestamp,
            SESS_TIMEOUT(timestamp, 60 * 30) OVER (
               PARTITION BY userIdentity
               ORDER BY timestamp
               ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW
            ) AS session_data,
            page_name,
            ingest_time
      FROM (
            SELECT
               userIdentity,
               timestamp,
               web.webPageDetails.name AS page_name,
               _acp_system_metadata.ingestTime AS ingest_time
            FROM events_dataset
            WHERE timestamp >= current_date - 90
      ) AS a
      ORDER BY userIdentity, timestamp ASC
   ) AS b
   WHERE b.ingest_time >= @from_batch_ingestion_time;

   -- Update the checkpoint_log table
   INSERT INTO checkpoint_log
   SELECT
      'data_feed' process_name,
      'SUCCESSFUL' process_status,
      cast(@to_batch_ingestion_time AS string) last_batch_ingestion_time,
      cast(@last_updated_timestamp AS TIMESTAMP) process_timestamp
END
$$;

$$ BEGIN
 SET drop_system_columns=false;

-- Initialize variables
 SET @last_updated_timestamp = SELECT CURRENT_TIMESTAMP;

-- Get the last processed batch ingestion time 1718755872325
 SET @from_batch_ingestion_time =
     SELECT coalesce(last_snapshot_id, 'HEAD')
     FROM checkpoint_log a
     JOIN (
         SELECT MAX(process_timestamp) AS process_timestamp
         FROM checkpoint_log
         WHERE process_name = 'data_feed'
         AND process_status = 'SUCCESSFUL'
     ) b
     ON a.process_timestamp = b.process_timestamp;

 -- Get the last batch ingestion time 1718758687865
 SET @to_batch_ingestion_time =
     SELECT MAX(_acp_system_metadata.ingestTime)
     FROM demo_data_trey_mcintyre_midvalues;

 -- Sessionize the data and insert into new_sessionized_data
 INSERT INTO new_sessionized_data
 SELECT *
 FROM (
     SELECT
         _id,
         timestamp,
         struct(User_Identity,
         cast(SESS_TIMEOUT(timestamp, 60 * 30) OVER (
             PARTITION BY User_Identity
             ORDER BY timestamp
             ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW
         ) as string) AS SessionData,
         to_timestamp(from_unixtime(ingest_time/1000, 'yyyy-MM-dd HH:mm:ss')) AS IngestTime,
         PageName,
         first_url,
         first_channel_type
           ) as _demosystem5
     FROM (
         SELECT
             _id,
             ENDUSERIDS._EXPERIENCE.MCID.ID as User_Identity,
             timestamp,
             web.webPageDetails.name AS PageName,
            attribution_first_touch(timestamp, '', web.webReferrer.url) OVER (PARTITION BY ENDUSERIDS._EXPERIENCE.MCID.ID ORDER BY timestamp ASC ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING).value AS first_url,
            attribution_first_touch(timestamp, '',channel.typeAtSource) OVER (PARTITION BY ENDUSERIDS._EXPERIENCE.MCID.ID ORDER BY timestamp ASC ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING).value AS first_channel_type,
             _acp_system_metadata.ingestTime AS ingest_time
         FROM demo_data_trey_mcintyre_midvalues
         WHERE timestamp >= current_date - 90
     )
     ORDER BY User_Identity, timestamp ASC
 )
 WHERE _demosystem5.IngestTime >= to_timestamp(from_unixtime(@from_batch_ingestion_time/1000, 'yyyy-MM-dd HH:mm:ss'));

-- Update the checkpoint_log table
INSERT INTO checkpoint_log
SELECT
   'data_feed' as process_name,
   'SUCCESSFUL' as process_status,
   cast(@to_batch_ingestion_time AS string) as last_snapshot_id,
   cast(@last_updated_timestamp AS timestamp) as process_timestamp;

END
$$;