再次遭遇笛卡尔积

改为MERGE /*+ordered*/ INTO YJBZH_GRXDFHZMXJL GRXDFHZMXJL USING ( SELECT 

A.AGMT_ID AS AGMT_ID, B.CUST_NAME AS CUST_NAME FROM 

DWF.F_AGT_CADB_BOOK_H A, DWF.F_AGT_SAVB_BASICINFO_H B WHERE A.START_DT 

<= TO_DATE(:B1 ,'yyyy-mm-dd') AND A.END_DT > TO_DATE(:B1 ,'yyyy-mm-dd') 

AND B.START_DT <= TO_DATE(:B1 ,'yyyy-mm-dd') AND B.END_DT > TO_DATE(:B1 

,'yyyy-mm-dd') AND A.MASTER_CARD_NO = B.AGMT_ID ) SAVB_BASICINFO ON ( 

RTRIM(GRXDFHZMXJL.DFZH) = SAVB_BASICINFO.AGMT_ID AND CJRQ = 

TO_CHAR(TO_DATE(:B1 , 'YYYY-MM-DD'),'yyyymmdd') ) WHEN MATCHED THEN 

UPDATE SET GRXDFHZMXJL.DFHM = SAVB_BASICINFO.CUST_NAME



加了/*+order*/ 还是出现了笛卡尔积,不得不再加hints



SQL_ID  5wyfn0trgu5rx, child number 0

-------------------------------------

MERGE /*+  ORDERED  use_hash(A B) use_hash(A GRXDFHZMXJL)*/ INTO 

YJBZH_GRXDFHZMXJL GRXDFHZMXJL USING ( SELECT A.AGMT_ID AS AGMT_ID, 

B.CUST_NAME AS CUST_NAME FROM DWF.F_AGT_CADB_BOOK_H A, 

DWF.F_AGT_SAVB_BASICINFO_H B WHERE A.START_DT <= TO_DATE(:B1 

,'yyyy-mm-dd') AND A.END_DT > TO_DATE(:B1 ,'yyyy-mm-dd') AND B.START_DT 

<= TO_DATE(:B1 ,'yyyy-mm-dd') AND B.END_DT > TO_DATE(:B1 ,'yyyy-mm-dd') 

AND A.MASTER_CARD_NO = B.AGMT_ID ) SAVB_BASICINFO ON ( 

RTRIM(GRXDFHZMXJL.DFZH) = SAVB_BASICINFO.AGMT_ID AND CJRQ = 

TO_CHAR(TO_DATE(:B1 , 'YYYY-MM-DD'),'yyyymmdd') ) WHEN MATCHED THEN 

UPDATE SET GRXDFHZMXJL.DFHM = SAVB_BASICINFO.CUST_NAME

 

Plan hash value: 2400855618

 

--------------------------------------------------------------------------------------------------------

| Id  | Operation             | Name                   | Rows  | Bytes |TempSpc| Cost (%CPU)| Time     |

--------------------------------------------------------------------------------------------------------

|   0 | MERGE STATEMENT       |                        |       |       |       |   125K(100)|          |

|   1 |  MERGE                | YJBZH_GRXDFHZMXJL      |       |       |       |            |          |

|   2 |   VIEW                |                        |       |       |       |            |          |

|*  3 |    HASH JOIN          |                        |     1 |  1862 |       |   125K  (2)| 00:25:01 |

|*  4 |     TABLE ACCESS FULL | YJBZH_GRXDFHZMXJL      |     1 |  1762 |       | 12948   (1)| 00:02:36 |

|*  5 |     HASH JOIN         |                        |    11M|  1074M|   374M|   112K  (2)| 00:22:25 |

|*  6 |      TABLE ACCESS FULL| F_AGT_CADB_BOOK_H      |  5951K|   306M|       | 69245   (2)| 00:13:51 |

|*  7 |      TABLE ACCESS FULL| F_AGT_SAVB_BASICINFO_H |  2120K|    93M|       | 18256   (2)| 00:03:40 |

--------------------------------------------------------------------------------------------------------

 

Predicate Information (identified by operation id):

---------------------------------------------------

 

   3 - access("A"."AGMT_ID"=RTRIM("GRXDFHZMXJL"."DFZH"))

   4 - filter("CJRQ"=TO_CHAR(TO_DATE(:B1,'YYYY-MM-DD'),'yyyymmdd'))

   5 - access("A"."MASTER_CARD_NO"="B"."AGMT_ID")

   6 - filter(("A"."MASTER_CARD_NO" IS NOT NULL AND "A"."START_DT"<=TO_DATE(:B1,'yyyy-mm-dd') 

              AND "A"."END_DT">TO_DATE(:B1,'yyyy-mm-dd')))

   7 - filter(("B"."START_DT"<=TO_DATE(:B1,'yyyy-mm-dd') AND 

              "B"."END_DT">TO_DATE(:B1,'yyyy-mm-dd')))