Oracle：复杂查询作为查询运行速度非常快，因为查看
我有一个基于UNION ALL的几个SELECT的View，每个都使用UNPIVOT，对于特定情况，在查询View时运行速度非常慢，但在查询基础查询时非常快。
以下是View上查询的解释计划：
select * from MY_SLOW_VIEW where SourceID='1234567890';
与基础查询的解释计划相比：
select * from (select ... ) where SourceID='1234567890';
现在看起来像使用View时索引不起作用。 我已经尝试在各个选项中添加INDEX提示，这些选择是联合所有，但没有效果。
（SourceID是显示为String的几个表中的oid。）
这是代码（释义）：
CREATE OR REPLACE FORCE VIEW "MY_SLOW_VIEW" (
"SOURCEID",
"ACTIONPARAMETERKEY",
"ACTIONPARAMETERVALUE",
"UPDDAT")
AS
SELECT
cast(sourceid as varchar2(50)) as sourceid,
actionparameterkey,
actionparametervalue,
upddat
FROM (
( SELECT
sourceid,
actionparameterkey,
to_char(actionparametervalue) as actionparametervalue,
upddat
FROM
( select
table1.oid as sourceid,
table1.upddat as upddat,
to_char(table1.status) as status,
to_char(table1.typ) as typ,
from table1)
UNPIVOT (actionparametervalue for actionparameterkey in (
typ as 'policyType',
status as 'policyStatus')
)
)
UNION ALL
( SELECT
sourceid,
actionparameterkey,
to_char(actionparametervalue) as actionparametervalue,
upddat
FROM
( select
table2.oid as sourceid,
table2.upddat as upddat,
to_char(table2.productKey) as productKey,
to_char(table2.contractID) as contractId,
from table2)
UNPIVOT (actionparametervalue for actionparameterkey in (
productKey as 'productKey',
contractId as 'contractId')
)
)
UNION ALL
[snip]
)
是否有任何提示作为如何使索引在视图中工作，或任何其他关于问题可能是什么的提示？
由于
[编辑 - 按照kordirko的建议添加计划表输出]
首先..原始查询
"PLAN_TABLE_OUTPUT"
"Plan hash value: 2498531538"
" "
"----------------------------------------------------------------------------------------------------------------------"
"| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |"
"----------------------------------------------------------------------------------------------------------------------"
"| 0 | SELECT STATEMENT | | 6 | 624 | 81 (7)| 00:00:01 |"
"| 1 | VIEW | | 6 | 624 | 81 (7)| 00:00:01 |"
"| 2 | UNION-ALL | | | | | |"
"| 3 | HASH UNIQUE | | 1 | 79 | 36 (3)| 00:00:01 |"
"|* 4 | VIEW | | 21 | 1659 | 35 (0)| 00:00:01 |"
"| 5 | UNPIVOT | | | | | |"
"| 6 | NESTED LOOPS | | 3 | 498 | 5 (0)| 00:00:01 |"
"| 7 | NESTED LOOPS | | 3 | 498 | 5 (0)| 00:00:01 |"
"| 8 | NESTED LOOPS | | 3 | 378 | 4 (0)| 00:00:01 |"
"| 9 | NESTED LOOPS | | 3 | 339 | 3 (0)| 00:00:01 |"
"| 10 | NESTED LOOPS | | 1 | 99 | 2 (0)| 00:00:01 |"
"| 11 | TABLE ACCESS BY INDEX ROWID| PLANANSCHLUSS | 1 | 46 | 1 (0)| 00:00:01 |"
"|* 12 | INDEX UNIQUE SCAN | SYS_C0012952 | 1 | | 1 (0)| 00:00:01 |"
"| 13 | TABLE ACCESS BY INDEX ROWID| ANSCHLUSS | 1 | 53 | 1 (0)| 00:00:01 |"
"|* 14 | INDEX UNIQUE SCAN | SYS_C0012832 | 1 | | 1 (0)| 00:00:01 |"
"| 15 | TABLE ACCESS BY INDEX ROWID | VERSICHERTER | 3 | 42 | 1 (0)| 00:00:01 |"
"|* 16 | INDEX RANGE SCAN | IX6_VERSICHERTER | 3 | | 1 (0)| 00:00:01 |"
"|* 17 | TABLE ACCESS BY INDEX ROWID | PARTNERROLLE | 1 | 13 | 1 (0)| 00:00:01 |"
"|* 18 | INDEX UNIQUE SCAN | SYS_C0012947 | 1 | | 1 (0)| 00:00:01 |"
"|* 19 | INDEX RANGE SCAN | IX5_NATPERSON | 1 | | 1 (0)| 00:00:01 |"
"| 20 | TABLE ACCESS BY INDEX ROWID | NATPERSON | 1 | 40 | 1 (0)| 00:00:01 |"
"| 21 | NESTED LOOPS | | 1 | 24 | 4 (0)| 00:00:01 |"
"| 22 | NESTED LOOPS | | 1 | 24 | 4 (0)| 00:00:01 |"
"|* 23 | TABLE ACCESS FULL | INVESTITION | 1 | 14 | 3 (0)| 00:00:01 |"
"|* 24 | INDEX UNIQUE SCAN | INVESTITION_AUFTRAG_PK | 1 | | 1 (0)| 00:00:01 |"
"|* 25 | TABLE ACCESS BY INDEX ROWID | INVESTITION_AUFTRAG | 1 | 10 | 1 (0)| 00:00:01 |"
"|* 26 | FILTER | | | | | |"
"|* 27 | TABLE ACCESS BY INDEX ROWID | PLANANSCHLUSS | 1 | 40 | 1 (0)| 00:00:01 |"
"|* 28 | INDEX UNIQUE SCAN | SYS_C0012952 | 1 | | 1 (0)| 00:00:01 |"
"|* 29 | TABLE ACCESS BY INDEX ROWID | PLANANSCHLUSS | 1 | 37 | 1 (0)| 00:00:01 |"
"|* 30 | INDEX RANGE SCAN | IX5_PLA_VERSICHERTERID | 1 | | 1 (0)| 00:00:01 |"
"| 31 | HASH UNIQUE | | 2 | 98 | 5 (20)| 00:00:01 |"
"|* 32 | VIEW | | 2 | 98 | 4 (0)| 00:00:01 |"
"| 33 | UNPIVOT | | | | | |"
"|* 34 | FILTER | | | | | |"
"| 35 | NESTED LOOPS OUTER | | 1 | 75 | 2 (0)| 00:00:01 |"
"|* 36 | TABLE ACCESS BY INDEX ROWID | MUTBELEG_AKTIVE_STAND | 1 | 34 | 1 (0)| 00:00:01 |"
"|* 37 | INDEX RANGE SCAN | IX1_MUTB_A_PLAFKOID_CALCDATE | 10 | | 1 (0)| 00:00:01 |"
"|* 38 | TABLE ACCESS BY INDEX ROWID | MUTBELEG_AKTIVE_STAND | 1 | 41 | 1 (0)| 00:00:01 |"
"|* 39 | INDEX RANGE SCAN | IX1_MUTB_A_PLAFKOID_CALCDATE | 10 | | 1 (0)| 00:00:01 |"
"| 40 | HASH UNIQUE | | 1 | 79 | 31 (4)| 00:00:01 |"
"|* 41 | VIEW | | 6 | 474 | 30 (0)| 00:00:01 |"
"| 42 | UNPIVOT | | | | | |"
"| 43 | NESTED LOOPS | | 1 | 159 | 5 (0)| 00:00:01 |"
"| 44 | NESTED LOOPS | | 1 | 119 | 4 (0)| 00:00:01 |"
"| 45 | NESTED LOOPS | | 1 | 106 | 3 (0)| 00:00:01 |"
"| 46 | NESTED LOOPS | | 1 | 90 | 2 (0)| 00:00:01 |"
"| 47 | TABLE ACCESS BY INDEX ROWID | RV_POLICE | 1 | 37 | 1 (0)| 00:00:01 |"
"|* 48 | INDEX UNIQUE SCAN | PK_RV_POLICE | 1 | | 1 (0)| 00:00:01 |"
"| 49 | TABLE ACCESS BY INDEX ROWID | ANSCHLUSS | 1 | 53 | 1 (0)| 00:00:01 |"
"|* 50 | INDEX UNIQUE SCAN | SYS_C0012832 | 1 | | 1 (0)| 00:00:01 |"
"| 51 | TABLE ACCESS BY INDEX ROWID | RV_LEISTUNGSFALL | 1 | 16 | 1 (0)| 00:00:01 |"
"|* 52 | INDEX UNIQUE SCAN | PK_RV_LEISTUNGSFALL | 1 | | 1 (0)| 00:00:01 |"
"|* 53 | TABLE ACCESS BY INDEX ROWID | PARTNERROLLE | 1 | 13 | 1 (0)| 00:00:01 |"
"|* 54 | INDEX UNIQUE SCAN | SYS_C0012947 | 1 | | 1 (0)| 00:00:01 |"
"| 55 | TABLE ACCESS BY INDEX ROWID | NATPERSON | 1 | 40 | 1 (0)| 00:00:01 |"
"|* 56 | INDEX RANGE SCAN | IX5_NATPERSON | 1 | | 1 (0)| 00:00:01 |"
"|* 57 | VIEW | | 1 | 91 | 2 (50)| 00:00:01 |"
"|* 58 | TABLE ACCESS BY INDEX ROWID | RV_LEISTUNGBASIS | 1 | 42 | 1 (0)| 00:00:01 |"
"|* 59 | INDEX RANGE SCAN | IX1_RV_LEISTUNGBASIS | 1 | | 1 (0)| 00:00:01 |"
"| 60 | HASH UNIQUE | | 1 | 35 | 2 (50)| 00:00:01 |"
"| 61 | TABLE ACCESS BY INDEX ROWID | RV_LEISTUNGBASIS | 1 | 35 | 1 (0)| 00:00:01 |"
"|* 62 | INDEX RANGE SCAN | IX1_RV_LEISTUNGBASIS | 1 | | 1 (0)| 00:00:01 |"
"----------------------------------------------------------------------------------------------------------------------"
" "
"Predicate Information (identified by operation id):"
"---------------------------------------------------"
" "
" 4 - filter(""unpivot_view_069"".""ACTIONPARAMETERVALUE"" IS NOT NULL)"
" 12 - access(""PA"".""OID""=3505032127)"
" 14 - access(""PA"".""ANSCHLUSSFKOID""=""A"".""OID"")"
" 16 - access(""PA"".""VERSICHERTERFKID""=""V"".""ID"")"
" 17 - filter(""PR"".""NATPERSONFKID"" IS NOT NULL)"
" 18 - access(""V"".""ROLLEVERSICHERTERFKOID""=""PR"".""OID"")"
" 19 - access(""PR"".""NATPERSONFKID""=""NP"".""ID"")"
" 23 - filter(""INV"".""PLANANSCHLUSSFKOID""=:B1)"
" 24 - access(""INV"".""AUFTRAGFKOID""=""INV_AUF"".""OID"")"
" 25 - filter(""INV_AUF"".""ISBESTAETIG""=0)"
" 26 - filter(CASE WHEN EXISTS (SELECT 0 FROM ""PLANANSCHLUSS"" ""PA2"" WHERE ""PA2"".""VERSICHERTERFKID""=:B1 AND "
" ""PA2"".""ANSCHLUSSFKOID""=:B2 AND NVL(""PA2"".""UPDDAT"",""PA2"".""CREDAT"")>NVL(:B3,:B4)) THEN 0 ELSE 1 END =1)"
" 27 - filter(""PA"".""ISIVA""=1)"
" 28 - access(""PA"".""OID""=3505032127)"
" filter(CASE WHEN EXISTS (SELECT 0 FROM ""INVESTITION_AUFTRAG"" ""INV_AUF"",""INVESTITION"" ""INV"" WHERE "
" ""INV"".""PLANANSCHLUSSFKOID""=:B1 AND ""INV"".""AUFTRAGFKOID""=""INV_AUF"".""OID"" AND ""INV_AUF"".""ISBESTAETIG""=0) THEN "
" '1' ELSE '0' END IS NOT NULL)"
" 29 - filter(""PA2"".""ANSCHLUSSFKOID""=:B1 AND NVL(""PA2"".""UPDDAT"",""PA2"".""CREDAT"")>NVL(:B2,:B3))"
" 30 - access(""PA2"".""VERSICHERTERFKID""=:B1)"
" 32 - filter(""unpivot_view_079"".""ACTIONPARAMETERVALUE"" IS NOT NULL)"
" 34 - filter(""MAS2"".""OID"" IS NULL)"
" 36 - filter(""MAS"".""ISTAKTUELLSTER""=1 AND CASE NVL(""MAS"".""PRODUKTSUBCD"",""MAS"".""PRODUKTCD"") WHEN 'na' THEN "
" ""MAS"".""PRODUKTCD"" ELSE NVL(""MAS"".""PRODUKTSUBCD"",""MAS"".""PRODUKTCD"") END IS NOT NULL)"
" 37 - access(""MAS"".""PLANANSCHLUSSFKOID""=3505032127)"
" 38 - filter(""MAS2"".""ISTAKTUELLSTER""(+)=1 AND ""MAS2"".""CREDAT""(+)>""MAS"".""CREDAT"" AND "
" NVL(""MAS2"".""PLANMERKMALCD2""(+),'ERWP')=NVL(""MAS"".""PLANMERKMALCD2"",'ERWP') AND CASE "
" NVL(""MAS"".""PRODUKTSUBCD"",""MAS"".""PRODUKTCD"") WHEN 'na' THEN ""MAS"".""PRODUKTCD"" ELSE "
" NVL(""MAS"".""PRODUKTSUBCD"",""MAS"".""PRODUKTCD"") END =CASE NVL(""MAS2"".""PRODUKTSUBCD""(+),""MAS2"".""PRODUKTCD""(+)) "
" WHEN 'na' THEN ""MAS2"".""PRODUKTCD""(+) ELSE NVL(""MAS2"".""PRODUKTSUBCD""(+),""MAS2"".""PRODUKTCD""(+)) END )"
" 39 - access(""MAS2"".""PLANANSCHLUSSFKOID""(+)=3505032127)"
" 41 - filter(""unpivot_view_111"".""ACTIONPARAMETERVALUE"" IS NOT NULL)"
" 48 - access(""POL"".""OID""=3505032127)"
" 50 - access(""POL"".""X_ANSCHLUSSFKOID""=""A"".""OID"")"
" 52 - access(""POL"".""RV_LEISTUNGSFALLFKOID""=""LF"".""OID"")"
" 53 - filter(""PR"".""NATPERSONFKID"" IS NOT NULL)"
" 54 - access(""LF"".""ROLLERENTNERFKOID""=""PR"".""OID"")"
" 56 - access(""PR"".""NATPERSONFKID""=""NP"".""ID"")"
" 57 - filter(""from$_subquery$_028"".""ISTAKTUELLSTER""=1)"
" 58 - filter(""RV2"".""LEISTUNGCD""=:B1 AND NVL(""RV2"".""UPDDAT"",""RV2"".""CREDAT"")>NVL(:B2,:B3))"
" 59 - access(""RV2"".""RV_POLICEFKOID""=:B1)"
" 62 - access(""RV"".""RV_POLICEFKOID""=3505032127)"
第二个..查看视图
"PLAN_TABLE_OUTPUT"
"Plan hash value: 2116722895"
" "
"----------------------------------------------------------------------------------------------------------------------"
"| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |"
"----------------------------------------------------------------------------------------------------------------------"
"| 0 | SELECT STATEMENT | | 6 | 624 | 199K (1)| 00:39:50 |"
"| 1 | VIEW | | 6 | 624 | 199K (1)| 00:39:50 |"
"| 2 | UNION-ALL | | | | | |"
"| 3 | HASH UNIQUE | | 1 | 79 | 20007 (1)| 00:04:01 |"
"|* 4 | VIEW | | 21 | 1659 | 20006 (1)| 00:04:01 |"
"| 5 | UNPIVOT | | | | | |"
"| 6 | NESTED LOOPS | | 3 | 498 | 2858 (1)| 00:00:35 |"
"| 7 | NESTED LOOPS | | 3 | 498 | 2858 (1)| 00:00:35 |"
"| 8 | NESTED LOOPS | | 3 | 378 | 2857 (1)| 00:00:35 |"
"| 9 | NESTED LOOPS | | 3 | 339 | 2856 (1)| 00:00:35 |"
"| 10 | NESTED LOOPS | | 1 | 99 | 2855 (1)| 00:00:35 |"
"|* 11 | TABLE ACCESS FULL | PLANANSCHLUSS | 1 | 46 | 2854 (1)| 00:00:35 |"
"| 12 | TABLE ACCESS BY INDEX ROWID| ANSCHLUSS | 1 | 53 | 1 (0)| 00:00:01 |"
"|* 13 | INDEX UNIQUE SCAN | SYS_C0012832 | 1 | | 1 (0)| 00:00:01 |"
"| 14 | TABLE ACCESS BY INDEX ROWID | VERSICHERTER | 3 | 42 | 1 (0)| 00:00:01 |"
"|* 15 | INDEX RANGE SCAN | IX6_VERSICHERTER | 3 | | 1 (0)| 00:00:01 |"
"|* 16 | TABLE ACCESS BY INDEX ROWID | PARTNERROLLE | 1 | 13 | 1 (0)| 00:00:01 |"
"|* 17 | INDEX UNIQUE SCAN | SYS_C0012947 | 1 | | 1 (0)| 00:00:01 |"
"|* 18 | INDEX RANGE SCAN | IX5_NATPERSON | 1 | | 1 (0)| 00:00:01 |"
"| 19 | TABLE ACCESS BY INDEX ROWID | NATPERSON | 1 | 40 | 1 (0)| 00:00:01 |"
"| 20 | NESTED LOOPS | | 1 | 24 | 4 (0)| 00:00:01 |"
"| 21 | NESTED LOOPS | | 1 | 24 | 4 (0)| 00:00:01 |"
"|* 22 | TABLE ACCESS FULL | INVESTITION | 1 | 14 | 3 (0)| 00:00:01 |"
"|* 23 | INDEX UNIQUE SCAN | INVESTITION_AUFTRAG_PK | 1 | | 1 (0)| 00:00:01 |"
"|* 24 | TABLE ACCESS BY INDEX ROWID | INVESTITION_AUFTRAG | 1 | 10 | 1 (0)| 00:00:01 |"
"| 25 | HASH UNIQUE | | 1 | 40 | 2865 (1)| 00:00:35 |"
"|* 26 | FILTER | | | | | |"
"|* 27 | TABLE ACCESS FULL | PLANANSCHLUSS | 1 | 40 | 2859 (1)| 00:00:35 |"
"|* 28 | TABLE ACCESS BY INDEX ROWID | PLANANSCHLUSS | 1 | 37 | 1 (0)| 00:00:01 |"
"|* 29 | INDEX RANGE SCAN | IX5_PLA_VERSICHERTERID | 1 | | 1 (0)| 00:00:01 |"
"| 30 | HASH UNIQUE | | 2 | 98 | 173K (1)| 00:34:43 |"
"|* 31 | VIEW | | 2 | 98 | 173K (1)| 00:34:43 |"
"| 32 | UNPIVOT | | | | | |"
"|* 33 | FILTER | | | | | |"
"| 34 | NESTED LOOPS OUTER | | 1 | 75 | 86771 (1)| 00:17:22 |"
"|* 35 | TABLE ACCESS BY INDEX ROWID | MUTBELEG_AKTIVE_STAND | 1 | 34 | 86770 (1)| 00:17:22 |"
"|* 36 | INDEX RANGE SCAN | IX5_MUTB_A_ISTAKTUELLSTER | 2381K| | 590 (1)| 00:00:08 |"
"|* 37 | TABLE ACCESS BY INDEX ROWID | MUTBELEG_AKTIVE_STAND | 23817 | 953K| 1 (0)| 00:00:01 |"
"|* 38 | INDEX RANGE SCAN | IX1_MUTB_A_PLAFKOID_CALCDATE | 10 | | 1 (0)| 00:00:01 |"
"| 39 | HASH UNIQUE | | 1 | 79 | 2330 (1)| 00:00:28 |"
"|* 40 | VIEW | | 6 | 474 | 2329 (1)| 00:00:28 |"
"| 41 | UNPIVOT | | | | | |"
"| 42 | NESTED LOOPS | | 1 | 159 | 388 (1)| 00:00:05 |"
"| 43 | NESTED LOOPS | | 1 | 159 | 388 (1)| 00:00:05 |"
"| 44 | NESTED LOOPS | | 1 | 119 | 387 (1)| 00:00:05 |"
"| 45 | NESTED LOOPS | | 1 | 66 | 386 (1)| 00:00:05 |"
"| 46 | NESTED LOOPS | | 1 | 53 | 385 (1)| 00:00:05 |"
"|* 47 | TABLE ACCESS FULL | RV_POLICE | 1 | 37 | 384 (1)| 00:00:05 |"
"| 48 | TABLE ACCESS BY INDEX ROWID| RV_LEISTUNGSFALL | 1 | 16 | 1 (0)| 00:00:01 |"
"|* 49 | INDEX UNIQUE SCAN | PK_RV_LEISTUNGSFALL | 1 | | 1 (0)| 00:00:01 |"
"|* 50 | TABLE ACCESS BY INDEX ROWID | PARTNERROLLE | 1 | 13 | 1 (0)| 00:00:01 |"
"|* 51 | INDEX UNIQUE SCAN | SYS_C0012947 | 1 | | 1 (0)| 00:00:01 |"
"| 52 | TABLE ACCESS BY INDEX ROWID | ANSCHLUSS | 1 | 53 | 1 (0)| 00:00:01 |"
"|* 53 | INDEX UNIQUE SCAN | SYS_C0012832 | 1 | | 1 (0)| 00:00:01 |"
"|* 54 | INDEX RANGE SCAN | IX5_NATPERSON | 1 | | 1 (0)| 00:00:01 |"
"| 55 | TABLE ACCESS BY INDEX ROWID | NATPERSON | 1 | 40 | 1 (0)| 00:00:01 |"
"|* 56 | VIEW | | 1 | 91 | 385 (1)| 00:00:05 |"
"|* 57 | TABLE ACCESS BY INDEX ROWID | RV_LEISTUNGBASIS | 1 | 42 | 1 (0)| 00:00:01 |"
"|* 58 | INDEX RANGE SCAN | IX1_RV_LEISTUNGBASIS | 1 | | 1 (0)| 00:00:01 |"
"| 59 | HASH UNIQUE | | 1 | 35 | 385 (1)| 00:00:05 |"
"|* 60 | TABLE ACCESS FULL | RV_LEISTUNGBASIS | 1 | 35 | 384 (1)| 00:00:05 |"
"----------------------------------------------------------------------------------------------------------------------"
" "
"Predicate Information (identified by operation id):"
"---------------------------------------------------"
" "
" 4 - filter(""unpivot_view_070"".""ACTIONPARAMETERVALUE"" IS NOT NULL)"
" 11 - filter(CAST(""PA"".""OID"" AS varchar2(50))='3505032127')"
" 13 - access(""PA"".""ANSCHLUSSFKOID""=""A"".""OID"")"
" 15 - access(""PA"".""VERSICHERTERFKID""=""V"".""ID"")"
" 16 - filter(""PR"".""NATPERSONFKID"" IS NOT NULL)"
" 17 - access(""V"".""ROLLEVERSICHERTERFKOID""=""PR"".""OID"")"
" 18 - access(""PR"".""NATPERSONFKID""=""NP"".""ID"")"
" 22 - filter(""INV"".""PLANANSCHLUSSFKOID""=:B1)"
" 23 - access(""INV"".""AUFTRAGFKOID""=""INV_AUF"".""OID"")"
" 24 - filter(""INV_AUF"".""ISBESTAETIG""=0)"
" 26 - filter(CASE WHEN EXISTS (SELECT 0 FROM SL_PAV_BEST.""INVESTITION_AUFTRAG"" "
" ""INV_AUF"",SL_PAV_BEST.""INVESTITION"" ""INV"" WHERE ""INV"".""PLANANSCHLUSSFKOID""=:B1 AND "
" ""INV"".""AUFTRAGFKOID""=""INV_AUF"".""OID"" AND ""INV_AUF"".""ISBESTAETIG""=0) THEN '1' ELSE '0' END IS NOT NULL AND "
" CASE WHEN EXISTS (SELECT 0 FROM SL_PAV_BEST.""PLANANSCHLUSS"" ""PA2"" WHERE ""PA2"".""VERSICHERTERFKID""=:B2 AND "
" ""PA2"".""ANSCHLUSSFKOID""=:B3 AND NVL(""PA2"".""UPDDAT"",""PA2"".""CREDAT"")>NVL(:B4,:B5)) THEN 0 ELSE 1 END =1)"
" 27 - filter(""PA"".""ISIVA""=1 AND CAST(""PA"".""OID"" AS varchar2(50))='3505032127')"
" 28 - filter(""PA2"".""ANSCHLUSSFKOID""=:B1 AND NVL(""PA2"".""UPDDAT"",""PA2"".""CREDAT"")>NVL(:B2,:B3))"
" 29 - access(""PA2"".""VERSICHERTERFKID""=:B1)"
" 31 - filter(""unpivot_view_080"".""ACTIONPARAMETERVALUE"" IS NOT NULL)"
" 33 - filter(""MAS2"".""OID"" IS NULL)"
" 35 - filter(CAST(""MAS"".""PLANANSCHLUSSFKOID"" AS varchar2(50))='3505032127' AND CASE "
" NVL(""MAS"".""PRODUKTSUBCD"",""MAS"".""PRODUKTCD"") WHEN 'na' THEN ""MAS"".""PRODUKTCD"" ELSE "
" NVL(""MAS"".""PRODUKTSUBCD"",""MAS"".""PRODUKTCD"") END IS NOT NULL)"
" 36 - access(""MAS"".""ISTAKTUELLSTER""=1)"
" 37 - filter(""MAS2"".""ISTAKTUELLSTER""(+)=1 AND ""MAS2"".""CREDAT""(+)>""MAS"".""CREDAT"" AND "
" NVL(""MAS2"".""PLANMERKMALCD2""(+),'ERWP')=NVL(""MAS"".""PLANMERKMALCD2"",'ERWP') AND CASE "
" NVL(""MAS"".""PRODUKTSUBCD"",""MAS"".""PRODUKTCD"") WHEN 'na' THEN ""MAS"".""PRODUKTCD"" ELSE "
" NVL(""MAS"".""PRODUKTSUBCD"",""MAS"".""PRODUKTCD"") END =CASE NVL(""MAS2"".""PRODUKTSUBCD""(+),""MAS2"".""PRODUKTCD""(+)) "
" WHEN 'na' THEN ""MAS2"".""PRODUKTCD""(+) ELSE NVL(""MAS2"".""PRODUKTSUBCD""(+),""MAS2"".""PRODUKTCD""(+)) END )"
" 38 - access(""MAS2"".""PLANANSCHLUSSFKOID""(+)=""MAS"".""PLANANSCHLUSSFKOID"")"
" 40 - filter(""unpivot_view_112"".""ACTIONPARAMETERVALUE"" IS NOT NULL)"
" 47 - filter(CAST(""POL"".""OID"" AS varchar2(50))='3505032127')"
" 49 - access(""POL"".""RV_LEISTUNGSFALLFKOID""=""LF"".""OID"")"
" 50 - filter(""PR"".""NATPERSONFKID"" IS NOT NULL)"
" 51 - access(""LF"".""ROLLERENTNERFKOID""=""PR"".""OID"")"
" 53 - access(""POL"".""X_ANSCHLUSSFKOID""=""A"".""OID"")"
" 54 - access(""PR"".""NATPERSONFKID""=""NP"".""ID"")"
" 56 - filter(""from$_subquery$_029"".""ISTAKTUELLSTER""=1)"
" 57 - filter(""RV2"".""LEISTUNGCD""=:B1 AND NVL(""RV2"".""UPDDAT"",""RV2"".""CREDAT"")>NVL(:B2,:B3))"
" 58 - access(""RV2"".""RV_POLICEFKOID""=:B1)"
" 60 - filter(CAST(""RV"".""RV_POLICEFKOID"" AS varchar2(50))='3505032127')"
1 个答案:
答案 0 :(得分：1)
比较两个计划中的这些行：
上层计划 - 谓词信息：
" 12 - access(""PA"".""OID""=3505032127)"
" 28 - access(""PA"".""OID""=3505032127)"
" 48 - access(""POL"".""OID""=3505032127)"
" 62 - access(""RV"".""RV_POLICEFKOID""=3505032127)"
和底部计划 - 视图：
" 11 - filter(CAST(""PA"".""OID"" AS varchar2(50))='3505032127')"
" 27 - filter(""PA"".""ISIVA""=1 AND CAST(""PA"".""OID"" AS varchar2(50))='3505032127')"
" 35 - filter(CAST(""MAS"".""PLANANSCHLUSSFKOID"" AS varchar2(50))='3505032127' AND CASE "
" 47 - filter(CAST(""POL"".""OID"" AS varchar2(50))='3505032127')"
" 60 - filter(CAST(""RV"".""RV_POLICEFKOID"" AS varchar2(50))='3505032127')"
如果不查看确切的视图定义，很难说，但是此视图中有一些内容强制将表列转换为varchar2，从而阻止视图使用索引，而原始查询使用直接数{{ 1}}（不是varchar）。
您可以尝试在查询中使用数字文字：
3505032127而不是varchar2 literal
select * from MY_SLOW_VIEW where SourceID=1234567890;
编辑---------
对不起，我在视图定义中没有注意到这一点：
select * from MY_SLOW_VIEW where SourceID='1234567890';
这是错误的根源。删除 SELECT
cast(sourceid as varchar2(50)) as sourceid,
到varchar的强制转换，这可以改进查询。
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