N_TYPE" = '0022' AND "A2"."RES_TYPE" = 'OBD') THEN
"A1"."RES_ID"
END,
'nls_sort=''BINARY'''))
FROM "CRM_SZ"."AAA" "A2",
"CRM_SZ"."BBB" "A1"
WHERE "A1"."RES_ID"(+) = "A2"."RES_CODE"
GROUP BY "A2"."ORG_ID"
63 rows selected.
Elapsed: 00:00:47.64
Execution Plan
----------------------------------------------------------
Plan hash value: 3074972763
------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 1065 | 4 (50)| 00:00:01 |
| 1 | SORT GROUP BY | | 1 | 1065 | 4 (50)| 00:00:01 |
|* 2 | HASH JOIN RIGHT OUTER| | 1 | 1065 | 3 (34)| 00:00:01 |
| 3 | INDEX FULL SCAN | IX_MO_CON_VALUE | 1 | 526 | 0 (0)| 00:00:01 |
| 4 | TABLE ACCESS FULL | AAA | 1 | 539 | 2 (0)| 00:00:01 |
------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("A1"."RES_ID"(+)="A2"."RES_CODE")
Statistics
----------------------------------------------------------
1065 recursive calls
3 db block gets
13375 consistent gets
16369 physical reads
0 redo size
4862 bytes sent via SQL*Net to client
791 bytes received via SQL*Net from client
6 SQL*Net roundtrips to/from client
12 sorts (memory)
1 sorts (disk)
63 rows processed
第二次优化后：
SELECT/*+use_hash(A1,A2) full(A1) full(A2) parallel(A1,5) parallel(A2,5) swap_join_inputs(A1)*/20131023,
"A2"."ORG_ID",
COUNT(DISTINCT NLSSORT(CASE "A2"."RES_TYPE"
WHEN 'DP' THEN
"A2"."RES_CODE"
END,
'nls_sort=''BINARY''')),
COUNT(DISTINCT NLSSORT(CASE "A2"."RES_TYPE"
WHEN 'BOX' THEN
"A2"."RES_CODE"
END,
'nls_sort=''BINARY''')),
COUNT(DISTINCT NLSSORT(CASE "A2"."RES_TYPE"
WHEN 'ONU' THEN
"A2"."RES_CODE"
END,
'nls_sort=''BINARY''')),
COUNT(DISTINCT NLSSORT(CASE "A2"."RES_TYPE"
WHEN 'OBD' THEN
"A2"."RES_CODE"
END,
'nls_sort=''BINARY''')),
COUNT(DISTINCT NLSSORT(CASE
WHEN ("A1"."CON_TYPE" = '001' AND "A2"."RES_TYPE" = 'DP') THEN
"A1"."RES_ID"
END,
'nls_sort=''BINARY''')),
COUNT(DISTINCT NLSSORT(CASE
WHEN ("A1"."CON_TYPE" = '002' AND "A2"."RES_TYPE" = 'BOX') THEN
"A1"."RES_ID"
END,
'nls_sort=''BINARY''')),
COUNT(DISTINCT NLSSORT(CASE
WHEN ("A1"."CON_TYPE" = '0011' AND "A2"."RES_TYPE" = 'ONU') THEN
"A1"."RES_ID"
END,
'nls_sort=''BINARY''')),
COUNT(DISTINCT NLSSORT(CASE
WHEN ("A1"."CON_TYPE" = '0022' AND "A2"."RES_TYPE" = 'OBD') THEN
"A1"."RES_ID"
END,
'nls_sort=''BINARY'''))
FROM "CRM_SZ"."AAA" "A2",
"CRM_SZ"."BBB" "A1"
WHERE "A1"."RES_ID"(+) = "A2"."RES_CODE"
GROUP BY "A2"."ORG_ID";
63 rows selected.
Elapsed: 00:00:10.21
Execution Plan
----------------------------------------------------------
Plan hash value: 4044842257
-------------------------------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | TQ |IN-OUT| PQ Distrib |
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