连接条件是两个字段“or”关系的SQL优化

下午发现一条SQL,消耗大量IO。
SQL文本
(部分表名和字段名做了替换)

SELECT "A3"."apptype",
       "A3"."appno",
       "A2"."edate",
       "A3"."cno",
       "A1"."rcode",
       "A3"."chnl",
       "A1"."pm",
       (SELECT SUM("A5"."pm")
          FROM "t_p" "A5"
         WHERE "A5"."cno" = "A3"."cno"),
       "A3"."pdate",
       "A3"."sdate",
       "A3"."acode"
  FROM "t_c" "A3", "t_e" "A2", "t_p" "A1"
 WHERE "A2"."etype" = 'CT'
   AND "A2"."estate" = '0'
   AND "A3"."cno" = "A1"."cno"
    AND ("A3"."PRTNO" = "A2"."cno" OR "A3"."cno" = "A2"."cno")
   AND "A2"."edate" >= TO_DATE(' 2014-10-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') - 90
   AND "A2"."edate" <= TO_DATE(' 2014-10-31 00:00:00', 'syyyy-mm-dd hh24:mi:ss')
   AND "A1"."ENDDATE" - "A3"."cvdate" > ADD_MONTHS("A3"."cvdate", 12) - "A3"."cvdate"
   AND "A3"."CONTTYPE" = '1'
   AND ("A2"."flag1" = '2' OR "A2"."flag1" IS NULL)
   AND "A1"."pno" = "A1"."MAINpno"
   AND ("A3"."chnl" = '1' OR "A3"."chnl" = '3')
   AND EXISTS
(SELECT 1
          FROM "t_ag" "A4"
         WHERE "A4"."acode" = TRIM("A3"."acode")
           AND ("A4"."depttype" = '4' OR "A4"."depttype" = '7'))


执行情况
IN SPID        SID MACHINE                   OBJECT_NAME         SQL_EXEC_START      EVENT                    SQL_ID        SQL_CHILD_NUMBER
-- --------- ---------- ------------------------- ------------------- ------------------- ------------------------ ------------- ----------------
2  20817   4255 xxxx                     t_e               2015-01-12    12:42:32             direct path read         0x7p8vx1hrmyn                0




PLAN_HASH_VALUE       EXEC    AVG_MIN AVG_BUFF_GET AVG_DF_READ_MB   AVG_ROWS        MIN      BUFFER_GET DF_READ_MB   SUM_ROWS
---------------                   ---------- ----------     ------------          --------------               ----------               ---------- ---------- ---------- ----------
3632503727                1           107.27    462219484       3510012.76             0                       107.27  462219484 3510012.76          0
 



由于连接条件是两个字段,or的关系。因此这个条件走了filter。
因此不得不在循环里面对t_e做全表扫描,单次执行物理读统计到的是3.5T(事后分析这条SQL应返回21万行,因此实际物理读远不止3.5T)。
14:46:45 SQL> select * from table(dbms_xplan.display_cursor('0x7p8vx1hrmyn', null, 'OUTLINE'));


PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SQL_ID  0x7p8vx1hrmyn, child number 0
-------------------------------------
SELECT "A3"."apptype","A3"."appno","A2"."edate","A3"."CON
TNO","A1"."rcode","A3"."chnl","A1"."pm", (SELECT
SUM("A5"."pm") FROM "t_p" "A5" WHERE
"A5"."cno"="A3"."cno"),"A3"."pdate","A3"."sdate","A3"."A
GENTCODE" FROM "t_c" "A3","t_e" "A2","t_p" "A1" WHERE
"A2"."etype"='CT' AND "A2"."estate"='0' AND
"A3"."cno"="A1"."cno" AND ("A3"."PRTNO"="A2"."cno" OR
"A3"."cno"="A2"."cno") AND "A2"."edate">=TO_DATE('
2014-10-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss')-90 AND
"A2"."edate"<=TO_DATE(' 2014-10-31 00:00:00', 'syyyy-mm-dd
hh24:mi:ss') AND "A1"."ENDDATE"-"A3"."cvdate">ADD_MONTHS("A3"."CVALID
ATE",12)-"A3"."cvdate" AND "A3"."CONTTYPE"='1' AND
("A2"."flag1"='2' OR "A2"."flag1" IS NULL) AND
"A1"."pno"="A1"."MAINpno" AND ("A3"."chnl"='1' OR
"A3"."chnl"='3') AND  EXISTS (SELECT 1 FROM "t_ag" "A4" WHERE
"A4"."acode"=TRIM("A3"."acode") AND ("A4"."depttype"='4' OR
"A4"."BRA


Plan hash value: 3632503727


------------------------------------------------------------------------------------
| Id  | Operation                     | Name               | Rows  | Bytes | Cost  |
------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT              |                    |       |       |  2593K|
|   1 |  SORT AGGREGATE               |                    |     1 |    25 |       |
|   2 |   TABLE ACCESS BY INDEX ROWID | t_p                |     2 |    50 |     5 |
|*  3 |    INDEX RANGE SCAN           | t_p_INDEX_7        |     2 |       |     4 |
|   4 |   NESTED LOOPS                 |                    |     1 |   237 |  2593K|
|   5 |   NESTED LOOPS                |                    |     1 |   197 |  2091K|
|*  6 |    HASH JOIN                  |                    |     5 |   565 |  2091K|
|   7 |     SORT UNIQUE               |                    | 88397 |  1035K| 28177 |
|*  8 |      VIEW                     | index$_join$_005   | 88397 |  1035K| 28177 |
|*  9 |       HASH JOIN               |                    |       |       |       |
|* 10 |        INDEX FAST FULL SCAN   | IDX_t_ag_MNGCOM    | 88397 |  1035K| 12889 |
|  11 |        INDEX FAST FULL SCAN   | PK_t_ag            | 88397 |  1035K| 13026 |
|* 12 |     TABLE ACCESS FULL         | t_c                |    13M|  1280M|  2062K|
|* 13 |    TABLE ACCESS BY INDEX ROWID| t_p                |     1 |    84 |     4 |
|* 14 |     INDEX RANGE SCAN          | t_p_INDEX_7        |     2 |       |     3 |
|* 15 |   TABLE ACCESS FULL           | t_e                |     1 |    40 |   502K|
------------------------------------------------------------------------------------


Outline Data
-------------


  /*+
      BEGIN_OUTLINE_DATA
      IGNORE_OPTIM_EMBEDDED_HINTS
      OPTIMIZER_FEATURES_ENABLE('9.2.0')
      DB_VERSION('11.2.0.3')
      OUTLINE_LEAF(@"SEL$2")
      OUTLINE_LEAF(@"SEL$20FCF987")
      OUTLINE_LEAF(@"SEL$8771BF6C")
      UNNEST(@"SEL$3")
      OUTLINE(@"SEL$1")
      OUTLINE(@"SEL$3")
      INDEX_JOIN(@"SEL$8771BF6C" "A4"@"SEL$3" ("t_ag"."MANAGECOM"
              "t_ag"."depttype") ("t_ag"."acode"))
      FULL(@"SEL$8771BF6C" "A3"@"SEL$1")
      INDEX_RS_ASC(@"SEL$8771BF6C" "A1"@"SEL$1" ("t_p"."cno"))
      FULL(@"SEL$8771BF6C" "A2"@"SEL$1")
      LEADING(@"SEL$8771BF6C" "A4"@"SEL$3" "A3"@"SEL$1" "A1"@"SEL$1" "A2"@"SEL$1")
      USE_HASH(@"SEL$8771BF6C" "A3"@"SEL$1")
      USE_NL(@"SEL$8771BF6C" "A1"@"SEL$1")
      USE_NL(@"SEL$8771BF6C" "A2"@"SEL$1")
      INDEX_RS_ASC(@"SEL$2" "A5"@"SEL$2" ("t_p"."cno"))
      END_OUTLINE_DATA
  */


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


   3 - access("A5"."cno"=:B1)
   6 - access("A4"."acode"=TRIM("A3"."acode"))
   8 - filter(("A4"."depttype"='4' OR "A4"."depttype"='7'))
   9 - access(ROWID=ROWID)
  10 - filter(("A4"."depttype"='4' OR "A4"."depttype"='7'))
  12 - filter(("A3"."CONTTYPE"='1' AND INTERNAL_FUNCTION("A3"."chnl")))
  13 - filter(("A1"."ENDDATE"-"A3"."cvdate">ADD_MONTHS(INTERNAL_FUNCTION(
              "A3"."cvdate"),12)-"A3"."cvdate" AND "A1"."pno"="A1"."MAINpno"))
  14 - access("A3"."cno"="A1"."cno")
  15 - filter(("A2"."etype"='CT' AND "A2"."estate"='0' AND
              ("A3"."PRTNO"="A2"."cno" OR "A3"."cno"="A2"."cno") AND
              "A2"."edate">=TO_DATE(' 2014-07-03 00:00:00', 'syyyy-mm-dd
              hh24:mi:ss') AND "A2"."edate"<=TO_DATE(' 2014-10-31 00:00:00',
              'syyyy-mm-dd hh24:mi:ss') AND ("A2"."flag1"='2' OR
              "A2"."flag1" IS NULL)))


Note
-----
   - cpu costing is off (consider enabling it)




调整方案
这里可以做or expand,但是直接加hint不太好加。改为用with as将这两张表抽出来。
38分钟结束,物理读260G
15:34:02 SQL> with x as
15:34:04   2  (
15:34:04   3  select /*+ no_merge no_unnest full(a2@sel$1) full(a2@sel$1_2) full(a3@sel$1) full(a3@sel$1_2)*/
15:34:04   4  "A3"."apptype",
15:34:04   5  "A3"."appno",
15:34:05   6  "A2"."edate",
15:34:05   7  "A3"."cno",
15:34:05   8  "A3"."chnl",
15:34:05   9  "A3"."pdate",
15:34:05  10  "A3"."sdate",
15:34:05  11  "A3"."acode",
15:34:05  12    a3.cvdate
15:34:05  13    from lis."t_c" "A3", lis."t_e" "A2"
15:34:05  14   where "A2"."etype" = 'CT'
15:34:05  15     AND "A2"."estate" = '0'
15:34:06  16     AND ("A3"."PRTNO" = "A2"."cno" OR "A3"."cno" = "A2"."cno")
15:34:06  17     AND "A2"."edate" >= TO_DATE(' 2014-10-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') - 90
15:34:06  18     AND "A2"."edate" <= TO_DATE(' 2014-10-31 00:00:00', 'syyyy-mm-dd hh24:mi:ss')
15:34:06  19     AND "A3"."CONTTYPE" = '1'
15:34:06  20     AND ("A2"."flag1" = '2' OR "A2"."flag1" IS NULL)
15:34:06  21     AND ("A3"."chnl" = '1' OR "A3"."chnl" = '3')
15:34:06  22  )
15:34:06  23  SELECT /*+ optimizer_features_enable('11.2.0.3') full(a4@sel$4)*/
15:34:06  24         "A3"."apptype",
15:34:07  25         "A3"."appno",
15:34:07  26         "A3"."edate",
15:34:07  27         "A3"."cno",
15:34:07  28         "A1"."rcode",
15:34:07  29         "A3"."chnl",
15:34:07  30         "A1"."pm",
15:34:07  31         (SELECT SUM("A5"."pm") FROM lis."t_p" "A5" WHERE "A5"."cno" = "A3"."cno"),
15:34:07  32         "A3"."pdate",
15:34:07  33         "A3"."sdate",
15:34:07  34         "A3"."acode"
15:34:08  35    FROM x a3, lis."t_p" "A1"
15:34:08  36   WHERE 1=1
15:34:08  37     AND "A3"."cno" = "A1"."cno"
15:34:08  38     AND "A1"."ENDDATE" - "A3"."cvdate" > ADD_MONTHS("A3"."cvdate", 12) - "A3"."cvdate"
15:34:08  39     AND "A1"."pno" = "A1"."MAINpno"
15:34:08  40     AND EXISTS
15:34:08  41   (SELECT 1
15:34:08  42            FROM lis."t_ag" "A4"
15:34:08  43           WHERE "A4"."acode" = TRIM("A3"."acode")
15:34:09  44             AND ("A4"."depttype" = '4' OR "A4"."depttype" = '7'))
15:34:09  45  ;


216169 rows selected.


Elapsed: 00:38:52.07


Execution Plan
----------------------------------------------------------
Plan hash value: 638620289


------------------------------------------------------------------------------------------------------
| Id  | Operation                    | Name          | Rows  | Bytes |TempSpc| Cost (%CPU)| Time     |
------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT             |               |     1 |   195 |       |  9371K  (1)| 31:14:18 |
|   1 |  SORT AGGREGATE              |               |     1 |    25 |       |            |          |
|   2 |   TABLE ACCESS BY INDEX ROWID| t_p           |     2 |    50 |       |     5   (0)| 00:00:01 |
|*  3 |    INDEX RANGE SCAN          | t_p_INDEX_7   |     2 |       |       |     4   (0)| 00:00:01 |
|   4 |  NESTED LOOPS                |               |       |       |       |            |          |
|   5 |   NESTED LOOPS               |               |     1 |   195 |       |  9371K  (1)| 31:14:18 |
|*  6 |    HASH JOIN RIGHT SEMI      |               |     1 |   111 |       |  9371K  (1)| 31:14:18 |
|*  7 |     TABLE ACCESS FULL        | t_ag          | 80749 |   946K|       | 51339   (1)| 00:10:17 |
|   8 |     VIEW                     |               |   617K|    58M|       |  9320K  (1)| 31:04:01 |
|   9 |      CONCATENATION           |               |       |       |       |            |          |
|* 10 |       HASH JOIN              |               |   587K|    79M|    29M|  4660K  (1)| 15:32:01 |
|* 11 |        TABLE ACCESS FULL     | t_e           |   587K|    22M|       |   896K  (1)| 02:59:20 |
|* 12 |        TABLE ACCESS FULL     | t_c           |    13M|  1262M|       |  3691K  (1)| 12:18:22 |
|* 13 |       HASH JOIN              |               | 29702 |  4089K|    29M|  4660K  (1)| 15:32:01 |
|* 14 |        TABLE ACCESS FULL     | t_e           |   587K|    22M|       |   896K  (1)| 02:59:20 |
|* 15 |        TABLE ACCESS FULL     | t_c           |    13M|  1262M|       |  3691K  (1)| 12:18:22 |
|* 16 |    INDEX RANGE SCAN          | t_p_INDEX_7   |     2 |       |       |     3   (0)| 00:00:01 |
|* 17 |   TABLE ACCESS BY INDEX ROWID| t_p           |     1 |    84 |       |     4   (0)| 00:00:01 |
------------------------------------------------------------------------------------------------------


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


   3 - access("A5"."cno"=:B1)
   6 - access("A4"."acode"=TRIM("A3"."acode"))
   7 - filter("A4"."depttype"='4' OR "A4"."depttype"='7')
  10 - access("A3"."cno"="A2"."cno")
  11 - filter("A2"."edate">=TO_DATE(' 2014-07-03 00:00:00', 'syyyy-mm-dd hh24:mi:ss')
              AND "A2"."etype"='CT' AND ("A2"."flag1" IS NULL OR "A2"."flag1"='2') AND
              "A2"."edate"<=TO_DATE(' 2014-10-31 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
              "A2"."estate"='0')
  12 - filter("A3"."CONTTYPE"='1' AND ("A3"."chnl"='1' OR "A3"."chnl"='3'))
  13 - access("A3"."PRTNO"="A2"."cno")
       filter(LNNVL("A3"."cno"="A2"."cno"))
  14 - filter("A2"."edate">=TO_DATE(' 2014-07-03 00:00:00', 'syyyy-mm-dd hh24:mi:ss')
              AND "A2"."etype"='CT' AND ("A2"."flag1" IS NULL OR "A2"."flag1"='2') AND
              "A2"."edate"<=TO_DATE(' 2014-10-31 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
              "A2"."estate"='0')
  15 - filter("A3"."CONTTYPE"='1' AND ("A3"."chnl"='1' OR "A3"."chnl"='3'))
  16 - access("A3"."cno"="A1"."cno")
  17 - filter("A1"."pno"="A1"."MAINpno" AND
              "A1"."ENDDATE"-"A3"."cvdate">ADD_MONTHS(INTERNAL_FUNCTION("A3"."cvdate"),12)-"A3"."CVALI
              DATE")




Statistics
----------------------------------------------------------
          1  recursive calls
         11  db block gets
   35805902  consistent gets
   34360652  physical reads
          0  redo size
   21614365  bytes sent via SQL*Net to client
     159045  bytes received via SQL*Net from client
      14413  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
     216169  rows processed
































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