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')))