explain plan for select * from (
select a.trans_org as org_id,
--a.cust_magr,
b.emp_name as cust_magr_name,
a.cust_name as cust_name,
a.cert_no as cert_no,
--a.prof_amt as prof_amt,
--a.convert_amt as convert_amt ,
CASE WHEN a.Correct_Flag = '0' THEN
a.Prof_Amt
WHEN a.Correct_Flag = 'T' THEN
-a.Prof_Amt
END as prof_amt,
CASE WHEN a.Correct_Flag = '0' THEN
a.convert_amt
WHEN a.Correct_Flag = 'T' THEN
-a.convert_amt
END as convert_amt,
row_number() over(partition by a.handle_no || a.seq_no, a.trans_no order by b.pty_id ) as xx
from DWF.F_EVT_FORR_CASH_EXCH a
left join dwf.F_AGT_S_PM_ACCOUNT_MGR_H xh
on xh.agmt_id like nvl(a.acct_no,'XXXZZZ')||'%'
left outer join (select pty_id,emp_name from DWF.F_PTY_EMP_INFO
where start_dt <= TO_DATE('2014-06-30','YYYY-MM-DD')
and end_dt > TO_DATE('2014-06-30','YYYY-MM-DD')) b
-- on a.cust_magr = b.pty_id
on nvl(xh.cust_magr,a.cust_magr) = b.pty_id
where a.trans_date >= TO_DATE('2014-01-01','YYYY-MM-DD')
and a.trans_date <= TO_DATE('2014-06-30','YYYY-MM-DD')
and a.correct_flag in ('0','T')
) where xx = 1 ;
select * from table(dbms_xplan.display());
Plan hash value: 4228062658
-------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time |
-------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 182M| 20G| | 18M (1)| 61:05:02 |
|* 1 | VIEW | | 182M| 20G| | 18M (1)| 61:05:02 |
|* 2 | WINDOW SORT PUSHED RANK| | 182M| 27G| 30G| 18M (1)| 61:05:02 |
|* 3 | HASH JOIN RIGHT OUTER | | 182M| 27G| | 11M (2)| 39:00:52 |
|* 4 | TABLE ACCESS FULL | F_PTY_EMP_INFO | 7817 | 221K| | 143 (3)| 00:00:02 |
| 5 | VIEW | | 171M| 21G| | 11M (2)| 39:00:24 |
| 6 | NESTED LOOPS OUTER | | 171M| 19G| | 11M (2)| 39:00:24 |
|* 7 | TABLE ACCESS FULL | F_EVT_FORR_CASH_EXCH | 1283 | 110K| | 212 (2)| 00:00:03 |
|* 8 | TABLE ACCESS FULL | F_AGT_S_PM_ACCOUNT_MGR_H | 133K| 4050K| | 9121 (2)| 00:01:50 |
-------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - filter("XX"=1)
2 - filter(ROW_NUMBER() OVER ( PARTITION BY "from$_subquery$_004"."HANDLE_NO"||TO_CHAR("from$_subq
uery$_004"."SEQ_NO"),"from$_subquery$_004"."TRANS_NO" ORDER BY "PTY_ID")<=1)
3 - access("PTY_ID"(+)=NVL("XH"."CUST_MAGR","A"."CUST_MAGR"))
4 - filter("END_DT"(+)>TO_DATE(' 2014-06-30 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"START_DT"(+)<=TO_DATE(' 2014-06-30 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
7 - filter("A"."TRANS_DATE">=TO_DATE(' 2014-01-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
("A"."CORRECT_FLAG"='0' OR "A"."CORRECT_FLAG"='T') AND "A"."TRANS_DATE"<=TO_DATE(' 2014-06-30
00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
8 - filter("XH"."AGMT_ID"(+) LIKE NVL("A"."ACCT_NO",'XXXZZZ')||'%')
可以看到F_AGT_S_PM_ACCOUNT_MGR_H没有走索引,但是为什么呢？
SQL> select a.column_name,
2 b.num_rows,
3 a.num_distinct Cardinality,
4 round(a.num_distinct / b.num_rows * 100, 2) selectivity,
5 a.histogram,
6 a.num_buckets
7 from dba_tab_col_statistics a, dba_tables b
8 where a.owner = b.owner
9 and a.table_name = b.table_name
10 and a.owner = 'DWF'
11 and a.table_name = 'F_AGT_S_PM_ACCOUNT_MGR_H';
COLUMN_NAME NUM_ROWS CARDINALITY SELECTIVITY HISTOGRAM NUM_BUCKETS
------------------------------ ---------- ----------- ----------- --------------- -----------
CUST_MAGR 2676202 5678 .21 HEIGHT BALANCED 254
SHARE_RATE 2676202 441 .02 NONE 1
CM_NAME 2676202 5384 .2 NONE 1
ORG_NAME 2676202 119 0 NONE 1
DW_DATA_DT 2676202 1 0 NONE 1
END_DT 2676202 1 0 NONE 1
AGMT_ID 2676202 2424320 90.59 HEIGHT BALANCED 254
AGMT_MOD_CD 2676202 1 0 NONE 1
ORG_NO 2676202 120 0 NONE 1
START_DT 2676202 1 0 NONE 1
10 rows selected.
直方图信息也有
那索引状态呢？
SQL> select index_name,status from dba_indexes where table_name='F_AGT_S_PM_ACCOUNT_MGR_H';
INDEX_NAME STATUS
------------------------------ --------
XIE1_F_ACC_MGR VALID
create index XIE1_F_ACC_MGR on F_AGT_S_PM_ACCOUNT_MGR_H (AGMT_ID)
tablespace EDWFTBS
drop index XIE1_F_ACC_MGR;
重建索引后正常:
Plan hash value: 127624381
---------------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time |
---------------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 182M| 20G| | 18M (1)| 60:42:50 |
|* 1 | VIEW | | 182M| 20G| | 18M (1)| 60:42:50 |
|* 2 | WINDOW SORT PUSHED RANK | | 182M| 27G| 30G| 18M (1)| 60:42:50 |
|* 3 | HASH JOIN RIGHT OUTER | | 182M| 27G| | 11M (1)| 38:38:39 |
|* 4 | TABLE ACCESS FULL | F_PTY_EMP_INFO | 7817 | 221K| | 143 (3)| 00:00:02 |
| 5 | VIEW | | 171M| 21G| | 11M (1)| 38:38:12 |
| 6 | NESTED LOOPS OUTER | | 171M| 19G| | 11M (1)| 38:38:12 |
|* 7 | TABLE ACCESS FULL | F_EVT_FORR_CASH_EXCH | 1283 | 110K| | 212 (2)| 00:00:03 |
| 8 | TABLE ACCESS BY INDEX ROWID| F_AGT_S_PM_ACCOUNT_MGR_H | 133K| 4050K| | 9034 (1)| 00:01:49 |
|* 9 | INDEX RANGE SCAN | XIE1_F_ACC_MGR | 24136 | | | 120 (1)| 00:00:02 |
---------------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------