组合索引

一: 创建的索引1
create index f_agt_comr_intdist_h_idx2 on f_agt_comr_intdist_h(agmt_id,intt,payable_int_amt,dw_data_dt) tablespace EDWFIDXTBS nologging 
SQL> select 
aa.acct_org,
aa.loan_acct_no,
aa.FUNCTIONARY,
aa.cust_no,
sum(dwm.pkg_tools.currcdtran(bb.INTT,aa.trans_cur_cd,'T00CNY','2014-02-10')) as jtlx
   from dwf.F_AGT_LONC_BASIC_INFO_H aa
   left join dwf.f_agt_comr_intdist_h bb 
             on aa.loan_acct_no=bb.agmt_id 
             and bb.dw_data_dt>=to_date('2014-01-01','yyyy-mm-dd') 
             and bb.dw_data_dt<=to_date('2014-02-10','yyyy-mm-dd')
   where aa.start_dt<=to_date('2014-02-10','yyyy-mm-dd') 
   and aa.end_dt>to_date('2014-02-10','yyyy-mm-dd') 
   and aa.trans_cur_cd<>'T00CNY'
   group by aa.acct_org,aa.loan_acct_no,aa.FUNCTIONARY,aa.cust_no
   having sum(bb.payable_int_amt)<>0;  2    3    4    5    6    7    8    9   10   11   12   13   14   15   16  

83 rows selected.


Execution Plan
----------------------------------------------------------
Plan hash value: 2676048883

--------------------------------------------------------------------------------------------------
| Id  | Operation	     | Name			 | Rows  | Bytes | Cost (%CPU)| Time	 |
--------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT     |				 |  1483K|   192M|   155K  (1)| 00:31:09 |
|*  1 |  FILTER 	     |				 |	 |	 |	      | 	 |
|   2 |   HASH GROUP BY      |				 |  1483K|   192M|   155K  (1)| 00:31:09 |
|   3 |    NESTED LOOPS OUTER|				 |  1483K|   192M|   155K  (1)| 00:31:08 |
|*  4 |     TABLE ACCESS FULL| F_AGT_LONC_BASIC_INFO_H	 |   615 | 48585 |  4303   (2)| 00:00:52 |
|*  5 |     INDEX RANGE SCAN | F_AGT_COMR_INTDIST_H_IDX2 |  2412 |   134K|   284   (1)| 00:00:04 |
--------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   1 - filter(SUM("BB"."PAYABLE_INT_AMT")<>0)
   4 - filter("AA"."START_DT"<=TO_DATE(' 2014-02-10 00:00:00', 'syyyy-mm-dd hh24:mi:ss')
	      AND "AA"."END_DT">TO_DATE(' 2014-02-10 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
	      "AA"."TRANS_CUR_CD"<>'T00CNY')
   5 - access("AA"."LOAN_ACCT_NO"="BB"."AGMT_ID"(+) AND "BB"."DW_DATA_DT"(+)>=TO_DATE('
	      2014-01-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND "BB"."DW_DATA_DT"(+)<=TO_DATE('
	      2014-02-10 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
       filter("BB"."DW_DATA_DT"(+)<=TO_DATE(' 2014-02-10 00:00:00', 'syyyy-mm-dd
	      hh24:mi:ss') AND "BB"."DW_DATA_DT"(+)>=TO_DATE(' 2014-01-01 00:00:00', 'syyyy-mm-dd
	      hh24:mi:ss'))

Note
-----
   - dynamic sampling used for this statement (level=2)


Statistics
----------------------------------------------------------
       3066  recursive calls
	  0  db block gets
      49583  consistent gets
	  0  physical reads
	  0  redo size
       5735  bytes sent via SQL*Net to client
	578  bytes received via SQL*Net from client
	  7  SQL*Net roundtrips to/from client
	  0  sorts (memory)
	  0  sorts (disk)
	 83  rows processed

二:创建索引2
create index f_agt_comr_intdist_h_idx2 on f_agt_comr_intdist_h(agmt_id,intt,payable_int_amt) tablespace EDWFIDXTBS nologging 

SQL> select /*+index(bb f_agt_comr_intdist_h_idx2)*/
aa.acct_org,
aa.loan_acct_no,
aa.FUNCTIONARY,
aa.cust_no,
sum(dwm.pkg_tools.currcdtran(bb.INTT,aa.trans_cur_cd,'T00CNY','2014-02-10')) as jtlx
   from dwf.F_AGT_LONC_BASIC_INFO_H aa
   left join dwf.f_agt_comr_intdist_h bb 
             on aa.loan_acct_no=bb.agmt_id 
             and bb.dw_data_dt>=to_date('2014-01-01','yyyy-mm-dd') 
             and bb.dw_data_dt<=to_date('2014-02-10','yyyy-mm-dd')
   where aa.start_dt<=to_date('2014-02-10','yyyy-mm-dd') 
   and aa.end_dt>to_date('2014-02-10','yyyy-mm-dd') 
   and aa.trans_cur_cd<>'T00CNY'
   group by aa.acct_org,aa.loan_acct_no,aa.FUNCTIONARY,aa.cust_no
   having sum(bb.payable_int_amt)<>0;    2    3    4    5    6    7    8    9   10   11   12   13   14   15   16  

83 rows selected.


Execution Plan
----------------------------------------------------------
Plan hash value: 4236917927

------------------------------------------------------------------------------------------------------------
| Id  | Operation		       | Name			   | Rows  | Bytes | Cost (%CPU)| Time	   |
------------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT	       |			   |  1483K|   192M|	22M  (1)| 74:59:22 |
|*  1 |  FILTER 		       |			   |	   |	   |		|	   |
|   2 |   HASH GROUP BY 	       |			   |  1483K|   192M|	22M  (1)| 74:59:22 |
|   3 |    NESTED LOOPS OUTER	       |			   |  1483K|   192M|	22M  (1)| 74:59:21 |
|*  4 |     TABLE ACCESS FULL	       | F_AGT_LONC_BASIC_INFO_H   |   615 | 48585 |  4303   (2)| 00:00:52 |
|*  5 |     TABLE ACCESS BY INDEX ROWID| F_AGT_COMR_INTDIST_H	   |  2412 |   134K| 42200   (1)| 00:08:27 |
|*  6 |      INDEX RANGE SCAN	       | F_AGT_COMR_INTDIST_H_IDX2 | 47300 |	   |   233   (1)| 00:00:03 |
------------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   1 - filter(SUM("BB"."PAYABLE_INT_AMT")<>0)
   4 - filter("AA"."START_DT"<=TO_DATE(' 2014-02-10 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
	      "AA"."END_DT">TO_DATE(' 2014-02-10 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
	      "AA"."TRANS_CUR_CD"<>'T00CNY')
   5 - filter("BB"."DW_DATA_DT"(+)<=TO_DATE(' 2014-02-10 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
	      "BB"."DW_DATA_DT"(+)>=TO_DATE(' 2014-01-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
   6 - access("AA"."LOAN_ACCT_NO"="BB"."AGMT_ID"(+))

Note
-----
   - dynamic sampling used for this statement (level=2)


Statistics
----------------------------------------------------------
       3066  recursive calls
	  0  db block gets
     121492  consistent gets
	  0  physical reads
	  0  redo size
       5735  bytes sent via SQL*Net to client
	578  bytes received via SQL*Net from client
	  7  SQL*Net roundtrips to/from client
	  0  sorts (memory)
	  0  sorts (disk)
	 83  rows processed


结论: 

由于2014-01-01<=DW_DATA_DT<=2014-02-10 ,这部分可以过滤大量数据,必须加入到组合索引中,而不是需要去回表在过滤。

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