需要将 Oracle "merge into" 查询转换为 PostgreSQL

Question

我正在尝试将以下 Oracle 查询转换为 PostgreSQL：

  MERGE into feepay.TRPT_W2_REPORTS TRPT1 
  USING(
  WITH RWS AS
    (SELECT PROG.BINCLIENT, TRPT.PUT_DIRECTORY
    FROM  feepay.program2 PROG
    INNER JOIN  feepay.TRPT_W2_PROGRAMS TRPT
    ON (PROG.BINCLIENT = TRPT.BINCLIENT OR PROG.ISSUER_ID = TRPT.ISSUER_ID))
  SELECT TCI.CUSTOMERNAME AS ACCOUNT,
  TC.CUSTOMER_ID AS urn,
  TC.LAST_NAME,
  TC.FIRST_NAME,
  TC.DOB,
  TCA.ADDRESS

  FROM feepay.TAU_CARDNUMBERS TCN
  INNER JOIN feepay.TAU_CUSTOMER_CARDNUMBER TCCN ON (TCN.CARDNUMBER_ID = TCCN.CARDNUMBER_ID)
  INNER JOIN feepay.TBLCUSTOMERS TC ON (TCCN.CUSTOMER_ID = TC.CUSTOMER_ID)
  LEFT JOIN feepay.tau_customeraddress TCA ON (TC.CUSTOMER_ID = TCA.CUSTOMER_ID)
  INNER JOIN feepay.TAU_ISSUER TI ON (TI.ISSUER_ID = TCN.ISSUER_ID)
  INNER JOIN feepay.TBLCUSTOMERS TCI ON (TCI.CUSTOMER_ID = TI.CUSTOMER_ID)
  LEFT JOIN feepay.TRPT_W2_REPORTS TRPT ON (TRPT.URN = TC.CUSTOMER_ID)
  WHERE BINCLIENT IN (SELECT BINCLIENT FROM RWS)
  AND TC.CUSTOMERNAME NOT IN ('freepay card','svds card')) TRPT2
  ON (TRPT1.URN = TRPT2.URN)
  WHEN MATCHED THEN
  UPDATE SET
  TRPT1.ACCOUNT = TRPT2.ACCOUNT,
  TRPT1.LAST_NAME = TRPT2.LAST_NAME,
  TRPT1.FIRST_NAME = TRPT2.FIRST_NAME,
  TRPT1.DOB = TRPT2.DOB,
  TRPT1.ADDRESS = TRPT2.ADDRESS,
  TRPT1.LAST_UPDATE = now(),
  TRPT1.STATUS = 'u' /* uPDATED */
  WHEN NOT MATCHED THEN
  INSERT (ACCOUNT, URN, LAST_NAME, FIRST_NAME, ISENTITY, DOB, ADDRESS, LAST_UPDATE, STATUS)
  VALUES (TRPT2.ACCOUNT, TRPT2.URN, TRPT2.LAST_NAME, TRPT2.FIRST_NAME, 'y', TRPT2.DOB, TRPT2.MIDDLE_NAME, 
    TRPT2.ADDRESS, now(), 'i');

不幸的是 PostgreSQL 不支持 MERGE，所以我真的被卡住了。我希望这里的一些数据库专家可以帮助我解决这个问题。

Answer 1

您可以使用 INSERT ON CONFLICT () 代替：

insert into feepay.TRPT_W2_REPORTS (ACCOUNT, URN, LAST_NAME, FIRST_NAME, ISENTITY, DOB, ADDRESS, LAST_UPDATE, STATUS)
WITH RWS AS (
  SELECT PROG.BINCLIENT, TRPT.PUT_DIRECTORY
  FROM  feepay.program2 PROG
    INNER JOIN  feepay.TRPT_W2_PROGRAMS TRPT
            ON (PROG.BINCLIENT = TRPT.BINCLIENT OR PROG.ISSUER_ID = TRPT.ISSUER_ID)
)
SELECT TCI.CUSTOMERNAME,
       TC.CUSTOMER_ID,
       TC.LAST_NAME,
       TC.FIRST_NAME,
       'Y'
       TC.DOB,
       TCA.ADDRESS, 
       now(), 
       'i'
FROM feepay.TAU_CARDNUMBERS TCN
  INNER JOIN feepay.TAU_CUSTOMER_CARDNUMBER TCCN ON (TCN.CARDNUMBER_ID = TCCN.CARDNUMBER_ID)
  INNER JOIN feepay.TBLCUSTOMERS TC ON (TCCN.CUSTOMER_ID = TC.CUSTOMER_ID)
  LEFT JOIN feepay.tau_customeraddress TCA ON (TC.CUSTOMER_ID = TCA.CUSTOMER_ID)
  INNER JOIN feepay.TAU_ISSUER TI ON (TI.ISSUER_ID = TCN.ISSUER_ID)
  INNER JOIN feepay.TBLCUSTOMERS TCI ON (TCI.CUSTOMER_ID = TI.CUSTOMER_ID)
  LEFT JOIN feepay.TRPT_W2_REPORTS TRPT ON (TRPT.URN = TC.CUSTOMER_ID)
WHERE BINCLIENT IN (SELECT BINCLIENT FROM RWS)
  AND TC.CUSTOMERNAME NOT IN ('freepay card','svds card')) TRPT2
ON CONFLICT (URN)
DO UPDATE SET
  ACCOUNT = excluded.ACCOUNT,
  LAST_NAME = excluded.LAST_NAME,
  FIRST_NAME = excluded.FIRST_NAME,
  DOB = excluded.DOB,
  ADDRESS = excluded.ADDRESS,
  LAST_UPDATE = now(),
  STATUS = 'u' /* uPDATED */

您需要验证 SELECT 列表中的列是否与 INSERT 列列表中列出的列匹配。

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