빈번한 대규모 업데이트를 처리할 때 Hive 기본 테이블의 데이터를 효율적으로 업데이트하려면 어떻게 해야 합니까?

insert overwrite target_data [partition() if applicable]
SELECT
  --select new if exists, old if not exists
  case when i.PK is not null then i.PK   else t.PK   end as PK,
  case when i.PK is not null then i.COL1 else t.COL1 end as COL1,
  ... 
  case when i.PK is not null then i.COL_n else t.COL_n end as COL_n
  FROM 
      target_data t --restrict partitions if applicable
      FULL JOIN increment_data i on (t.PK=i.PK); 

SELECT
  PK,
  COL1,
  ... 
  COL_n,
  row_number() OVER (PARTITION BY PK ORDER BY PK) as rownum
FROM 
  (
    SELECT 
      * 
    FROM 
      target_data 
    UNION ALL
    SELECT 
      * 
    FROM 
      increment_data
  ) 
GROUP BY
  PK, COL1, ..., COL_n

DELETE
FROM
  target_data
WHERE
  EXISTS (
    SELECT
      1
    FROM
      combined_data
    WHERE
      combined_data.PK = target_data.PK
      AND combined_data.rownum > 1
  )

INSERT OVERWRITE
INTO
  target_data
SELECT
  *
FROM
  combined_data
WHERE
  combined_data.rownum = 1