SQL_ID cqsz37256v36j, child number 1
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INSERT /*+append*/ INTO TMP_ACCT_AF NOLOGGING ( DATA_DATE , ACCT_NO , ACCT_ORD , ACCT_NO_PK , ACCT_BAL , D_CMP_BAL ,
M_CMP_BAL , Y_CMP_BAL , FLAG , ACCT_FLAG , TERM , TERM_FLAG , CUR_CODE , CUR_NAME , SUB_CODE , CUST_NO , CUST_TYPE ,
CUST_NAME , BANK_CORP_CODE , BRAN_NAME , MGR_CODE , MGR_NAME , OPEN_DATE , FIX_BAL , DIV_FIX_FLAG , ADJUST_AMT ,
ADJUST_AMT_AF , Y_AVG_AF , Y_ADD_AF , ACCT_INTR , SIM_PROFIT , SEPA_POR , PRI , BRAN_CODE , UNIT1_CODE , UNIT2_CODE ,
UNIT3_CODE , DEPT1_CODE , INTR_RATE , DUE_DATE ) SELECT /*+use_merge(t1 t2)parallel(t1 16) use_hash(t1 t3)*/ DATA_DATE,
ACCT_NO, ACCT_ORD, ACCT_NO_PK, ACCT_BAL, D_CMP_BAL, M_CMP_BAL, Y_CMP_BAL, FLAG, ACCT_FLAG, TERM, TERM_FLAG, CUR_CODE,
CUR_NAME, SUB_CODE, CUST_NO, CUST_TYPE, CUST_NAME, BANK_CORP_CODE, BRAN_NAME, NVL(T3.MGR_CODE, T1.MGR_CODE), T1.MGR_NAME,
OPEN_DATE, FIX_BAL, DIV_FIX_FLAG, ADJUST_AMT, ADJUST_AMT_AF, Y_AVG_AF, Y_ADD_AF, ACCT_INTR, SIM_PROFIT, SEPA_POR, PRI,
T1.BRAN_CODE, T2.UNIT1_CODE, T2.UNIT2_CODE, T1.BRAN_CODE
Plan hash value: 1366440900
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| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | TQ |IN-OUT| PQ Distrib |
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| 0 | INSERT STATEMENT | | | | 24 (100)| | | | |
| 1 | LOAD AS SELECT | | | | | | | | |
| 2 | PX COORDINATOR | | | | | | | | |
| 3 | PX SEND QC (RANDOM) | :TQ10005 | 1 | 672 | 24 (30)| 00:00:01 | Q1,05 | P->S | QC (RAND) |
| 4 | VIEW | | 1 | 672 | 24 (30)| 00:00:01 | Q1,05 | PCWP | |
| 5 | SORT UNIQUE | | 1 | 650 | 24 (30)| 00:00:01 | Q1,05 | PCWP | |
| 6 | PX RECEIVE | | 1 | 650 | 23 (27)| 00:00:01 | Q1,05 | PCWP | |
| 7 | PX SEND HASH | :TQ10004 | 1 | 650 | 23 (27)| 00:00:01 | Q1,04 | P->P | HASH |
|* 8 | HASH JOIN OUTER | | 1 | 650 | 23 (27)| 00:00:01 | Q1,04 | PCWP | |
| 9 | PX RECEIVE | | 1 | 622 | 18 (28)| 00:00:01 | Q1,04 | PCWP | |
| 10 | PX SEND HASH | :TQ10003 | 1 | 622 | 18 (28)| 00:00:01 | Q1,03 | P->P | HASH |
| 11 | MERGE JOIN OUTER | | 1 | 622 | 18 (28)| 00:00:01 | Q1,03 | PCWP | |
| 12 | SORT JOIN | | 1 | 601 | 3 (34)| 00:00:01 | Q1,03 | PCWP | |
| 13 | PX RECEIVE | | 1 | 601 | 2 (0)| 00:00:01 | Q1,03 | PCWP | |
| 14 | PX SEND HASH | :TQ10002 | 1 | 601 | 2 (0)| 00:00:01 | Q1,02 | P->P | HASH |
| 15 | PX BLOCK ITERATOR | | 1 | 601 | 2 (0)| 00:00:01 | Q1,02 | PCWC | |
|* 16 | TABLE ACCESS FULL| TMP_ACCT_AF2 | 1 | 601 | 2 (0)| 00:00:01 | Q1,02 | PCWP | |
|* 17 | SORT JOIN | | 8158 | 167K| 15 (27)| 00:00:01 | Q1,03 | PCWP | |
| 18 | BUFFER SORT | | | | | | Q1,03 | PCWC | |
| 19 | PX RECEIVE | | 8158 | 167K| 12 (9)| 00:00:01 | Q1,03 | PCWP | |
| 20 | PX SEND HASH | :TQ10000 | 8158 | 167K| 12 (9)| 00:00:01 | | S->P | HASH |
| 21 | TABLE ACCESS FULL| S_PM_MGR_DEPT_RELA | 8158 | 167K| 12 (9)| 00:00:01 | | | |
| 22 | BUFFER SORT | | | | | | Q1,04 | PCWC | |
| 23 | PX RECEIVE | | 3902 | 106K| 5 (20)| 00:00:01 | Q1,04 | PCWP | |
| 24 | PX SEND HASH | :TQ10001 | 3902 | 106K| 5 (20)| 00:00:01 | | S->P | HASH |
|* 25 | INDEX FAST FULL SCAN | MGR_DEPT_RELA_IDX2 | 3902 | 106K| 5 (20)| 00:00:01 | | | |
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Predicate Information (identified by operation id):
---------------------------------------------------
8 - access("T1"."MGR_CODE"="T3"."MGR_CODE")
16 - access(:Z>=:Z AND :Z<=:Z)
17 - access("T1"."BRAN_CODE"="T2"."UNIT3_CODE")
filter("T1"."BRAN_CODE"="T2"."UNIT3_CODE")
25 - filter("T3"."DEPT1_CODE"<>'999999999')
TMP_ACCT_AF2 T1
(SELECT DISTINCT T2.UNIT3_CODE, T2.UNIT2_CODE, T2.UNIT1_CODE
FROM S_PM_MGR_DEPT_RELA T2) T2
T2是个大表
S_PM_MGR_DEPT_RELA T3
T1 和 T2 进行 sort merge join 在 T1和 T3进行 hash join,直接导致temp被耗尽
(SELECT /*+use_merge(t1 t2)parallel(t1 16) use_hash(t1 t3)*/
DATA_DATE,
ACCT_NO,
ACCT_ORD,
ACCT_NO_PK,
ACCT_BAL,
D_CMP_BAL,
M_CMP_BAL,
Y_CMP_BAL,
FLAG,
ACCT_FLAG,
TERM,
TERM_FLAG,
CUR_CODE,
CUR_NAME,
SUB_CODE,
CUST_NO,
CUST_TYPE,
CUST_NAME,
BANK_CORP_CODE,
BRAN_NAME,
NVL(T3.MGR_CODE, T1.MGR_CODE),
T1.MGR_NAME,
OPEN_DATE,
FIX_BAL,
DIV_FIX_FLAG,
ADJUST_AMT,
ADJUST_AMT_AF,
Y_AVG_AF,
Y_ADD_AF,
ACCT_INTR,
SIM_PROFIT,
SEPA_POR,
PRI,
T1.BRAN_CODE,
T2.UNIT1_CODE,
T2.UNIT2_CODE,
T1.BRAN_CODE AS UNIT3_CODE,
NVL(T3.DEPT1_CODE, '999999999'),
T1.INTR_RATE,
T1.DUE_DATE
FROM TMP_ACCT_AF2 T1
LEFT JOIN S_PM_MGR_DEPT_RELA T3
ON T1.MGR_CODE = T3.MGR_CODE
AND T3.DEPT1_CODE <> '999999999'
LEFT JOIN (SELECT DISTINCT T2.UNIT3_CODE, T2.UNIT2_CODE, T2.UNIT1_CODE
FROM S_PM_MGR_DEPT_RELA T2) T2
ON T1.BRAN_CODE = T2.UNIT3_CODE)
Plan hash value: 4109009912
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| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time | TQ |IN-OUT| PQ Distrib |
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| 0 | INSERT STATEMENT | | 142M| 28G| | 629 (69)| 00:00:02 | | | |
| 1 | LOAD AS SELECT | TMP_ACCT_AF | | | | | | | | |
| 2 | PX COORDINATOR | | | | | | | | | |
| 3 | PX SEND QC (RANDOM) | :TQ10002 | 142M| 28G| | 629 (69)| 00:00:02 | Q1,02 | P->S | QC (RAND) |
| 4 | MERGE JOIN OUTER | | 142M| 28G| | 629 (69)| 00:00:02 | Q1,02 | PCWP | |
| 5 | SORT JOIN | | 1500K| 208M| 450M| 254 (27)| 00:00:01 | Q1,02 | PCWP | |
|* 6 | HASH JOIN RIGHT OUTER | | 1500K| 208M| | 225 (17)| 00:00:01 | Q1,02 | PCWP | |
| 7 | BUFFER SORT | | | | | | | Q1,02 | PCWC | |
| 8 | PX RECEIVE | | 3902 | 62432 | | 5 (20)| 00:00:01 | Q1,02 | PCWP | |
| 9 | PX SEND BROADCAST | :TQ10000 | 3902 | 62432 | | 5 (20)| 00:00:01 | | S->P | BROADCAST |
|* 10 | INDEX FAST FULL SCAN| MGR_DEPT_RELA_IDX2 | 3902 | 62432 | | 5 (20)| 00:00:01 | | | |
| 11 | PX BLOCK ITERATOR | | 1407K| 174M| | 217 (16)| 00:00:01 | Q1,02 | PCWC | |
| 12 | TABLE ACCESS FULL | TMP_ACCT_AF2 | 1407K| 174M| | 217 (16)| 00:00:01 | Q1,02 | PCWP | |
|* 13 | SORT JOIN | | 7315 | 471K| | 17 (36)| 00:00:01 | Q1,02 | PCWP | |
| 14 | BUFFER SORT | | | | | | | Q1,02 | PCWC | |
| 15 | PX RECEIVE | | 7315 | 471K| | 15 (27)| 00:00:01 | Q1,02 | PCWP | |
| 16 | PX SEND BROADCAST | :TQ10001 | 7315 | 471K| | 15 (27)| 00:00:01 | | S->P | BROADCAST |
| 17 | VIEW | | 7315 | 471K| | 15 (27)| 00:00:01 | | | |
| 18 | SORT UNIQUE | | 7315 | 150K| | 15 (27)| 00:00:01 | | | |
| 19 | TABLE ACCESS FULL | S_PM_MGR_DEPT_RELA | 8158 | 167K| | 12 (9)| 00:00:01 | | | |
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Predicate Information (identified by operation id):
---------------------------------------------------
6 - access("T1"."MGR_CODE"="T3"."MGR_CODE"(+))
10 - filter("T3"."DEPT1_CODE"(+)<>'999999999')
13 - access("T1"."BRAN_CODE"="T2"."UNIT3_CODE"(+))
filter("T1"."BRAN_CODE"="T2"."UNIT3_CODE"(+))
正确关联顺序为T1 和 T3进行HASH JOIN 在通过T1和T2 进行sort merge join
这里为什么走sort merge join
SELECT DISTINCT T2.UNIT3_CODE, T2.UNIT2_CODE, T2.UNIT1_CODE
FROM S_PM_MGR_DEPT_RELA T2
因为distinct sort uniqe 已经排序了
1.使用HINT
2.非等值JOIN
3.有一个表或者2个表都已经排序好了
4.JOIN列有索引，对索引进行INDEX FULL SCAN(请自己复习前文的访问路径)返回有序的结
果，再和另外的表进行JOIN。