5 tables Used - Performance Improvement Help Req...

Hello Experts,
I am using 5 table joins to fetch data from query; does this will degrade performance?
Please find below the query used; in this WHERE Clause, 1) le.locker_entry_id is PRIMARY Key column
2) dc.object_type - created a index on this column 3) Created a function based index on this column upper(dt.partner_device_type)
Can any other code improvement be done or view be created ?
Please suggest.
SELECT count(*) FROM locker_entry le;
COUNT(*)
1762
SELECT count(*) FROM digital_compatibility dc;
COUNT(*)
227757
SELECT count(*) FROM digital_encode_profile dep;
COUNT(*)
48
SELECT count(*) FROM device_type dt;
COUNT(*)
421
SELECT count(*) FROM digital_sku dsku;
COUNT(*)
26037
EXPLAIN PLAN FOR
SELECT
/*+ INDEX(dep, DIGITAL_ENCODE_PROFILE_ID_PK) */
DISTINCT le.locker_entry_id AS locker_entry_id,
dep.delivery_type
FROM locker_entry le,
digital_compatibility dc,
digital_encode_profile dep,
device_type dt,
digital_sku dsku
WHERE le.sku_id                   = dsku.legacy_id
AND le.digital_package_id         = dsku.digital_package_id
AND dsku.digital_sku_id           = dc.object_id
AND dc.encode_profile_id          =dep.digital_encode_profile_id
AND dt.capability_set_id          =dc.capability_set_id
AND le.locker_entry_id           IN (:1, :2, :3, :4, :5, :6, :7, :8, :9, :10, :11, :12, :13, :14, :15, :16, :17, :18, :19, :20, :21, :22, :23, :24, :25, :26, :27, :28, :29, :30, :31, :32)
AND dc.object_type                =:"SYS_B_0"
AND upper(dt.partner_device_type) =:33;
SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY);
| Id | Operation                             | Name                         | Rows | Bytes | Cost (%CPU)|
|   0 | SELECT STATEMENT                      |                              |     1 |   370 |   481   (3)|
|   1 | HASH UNIQUE                          |                              |     1 |   370 |   481   (3)|
|   2 |   NESTED LOOPS                        |                              |     1 |   370 |   480   (3)|
|   3 |    NESTED LOOPS                       |                              |     1 |   336 |   479   (3)|
|* 4 |     HASH JOIN                         |                              |     1 |   193 |   478   (3)|
|   5 |      MAT_VIEW ACCESS BY INDEX ROWID   | DIGITAL_SKU                  |     1 |    48 |     5   (0)|
|   6 |       NESTED LOOPS                    |                              |    16 | 1392 |     5   (0)|
|   7 |        INLIST ITERATOR                |                              |       |       |            |
|   8 |         TABLE ACCESS BY INDEX ROWID   | LOCKER_ENTRY                 |    32 | 1248 |     1   (0)|
|* 9 |          INDEX RANGE SCAN             | LOCKER_ENTRY_ID_PK           |    32 |       |     1   (0)|
| 10 |        BITMAP CONVERSION TO ROWIDS    |                              |       |       |            |
| 11 |         BITMAP AND                    |                              |       |       |            |
| 12 |          BITMAP CONVERSION FROM ROWIDS|                              |       |       |            |
|* 13 |           INDEX RANGE SCAN            | IDX_DIGITAL_SKU_LEGACY_ID    |     1 |       |     1   (0)|
| 14 |          BITMAP CONVERSION FROM ROWIDS|                              |       |       |            |
|* 15 |           INDEX RANGE SCAN            | IDX_DIGITAL_PACKAGE_ID       |     1 |       |     1   (0)|
|* 16 |      MAT_VIEW ACCESS FULL             | DIGITAL_COMPATIBILITY        | 2098 |   217K|   472   (3)|
|* 17 |     INDEX RANGE SCAN                  | DEVICE_TYPE_IDX              |     1 |   143 |     1   (0)|
| 18 |    MAT_VIEW ACCESS BY INDEX ROWID     | DIGITAL_ENCODE_PROFILE       |     1 |    34 |     1   (0)|
|* 19 |     INDEX UNIQUE SCAN                 | DIGITAL_ENCODE_PROFILE_ID_PK |     1 |       |     1   (0)|
Predicate Information (identified by operation id):
   4 - access("DSKU"."DIGITAL_SKU_ID"=TO_NUMBER("DC"."OBJECT_ID"))
   9 - access("LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:1) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:2) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:3) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:4) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:5) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:6) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:7) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:8) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:9) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:10) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:11) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:12) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:13) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:14) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:15) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:16) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:17) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:18) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:19) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:20) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:21) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:22) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:23) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:24) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:25) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:26) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:27) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:28) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:29) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:30) OR
              "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:31) OR "LE"."LOCKER_ENTRY_ID"=TO_NUMBER(:32))
13 - access("LE"."SKU_ID"="DSKU"."LEGACY_ID")
15 - access("LE"."DIGITAL_PACKAGE_ID"="DSKU"."DIGITAL_PACKAGE_ID")
16 - filter("DC"."OBJECT_TYPE"=:SYS_B_0)
17 - access("DT"."CAPABILITY_SET_ID"="DC"."CAPABILITY_SET_ID" AND
              UPPER("PARTNER_DEVICE_TYPE")=:33)
19 - access("DC"."ENCODE_PROFILE_ID"="DEP"."DIGITAL_ENCODE_PROFILE_ID")
Note
   - 'PLAN_TABLE' is old version
Trace information
=================
recursive calls     17
db block gets     0
consistent gets     239
physical reads     61
redo size     0
bytes sent via SQL*Net to client     742
bytes received via SQL*Net from client     1361
SQL*Net roundtrips to/from client     2
sorts (memory)     5
sorts (disk)     0
   Edited by: Linus on Oct 10, 2011 2:44 AM

Linus wrote:
Yes Bravid i got regarding the point to remove the hint from the query; unless there is a change in execution plan with index hint.
My concern is; is there any issues by keeping 5 tables on single query and will this degrade performance?
Because as of during the certification practise; i used to overcome some where ,"NOT to use many table joins".
So that is reason i am asking you; sorry if am wrong in any ways.
Thanks...There's nothing inherently wrong with joining lots of tables and there isn't one specific thing that will degrade performance. You could have a query that joins 2 tables performing very badly and a query with 10 tables that performs very well. A lot of it is down to the quality of the decisions the optimiser can make. To get the best decisions out of it you need to make sure it had enough information to work with. So that means making sure stats are available and relevant for the data you're querying and removing any hints unless you have a specific reason to use them.
Earlier this year I had the "joy" of working with a query that had 65 tables in it. It was an INSERT INTO...SELECT FROM and it was a clear example of where a single statement really should have been about 6 or 7 separate statements. The reason in this case was because there were 6 or 7 different sections to the query that had essentially no relationship with each other and they were all outer joined and used lots of analytic functions and case statements to categorise each row and populate the same columns with different values depending on which query block it had originated from.
This is an extreme example but the point is you have to look at the statement and decide whether it does it's job well. My personal preference is to try to avoid big "generic" SQL statements that cater for lots of different scenarios because they can easily become over complicated and difficult to maintain and tune.
HTH
David
Edited by: Bravid on Oct 10, 2011 1:53 PM

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Dear BSP ians,
I need to edit,modify multiple records and has to be updated in the master table using MVC. We are using SAP NetWeaver 2004s.
We have gone through the sample codings which is present in the forum already, and we have worked out using Pages with Flow Logic on ECC 6.0 and those are not getting exexcuted for "SAP NetWeaver 2004s".
Help me in this issue.
Points will be rewarded for helpful infos.
Gokul.N

My issue is, the sample codes present alreaady in the forums works in ECC 6.0
But we are using "SAP Netweaver 2004s"

5 tables Used - Performance Improvement Help Req...

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