Condition not executed in Plan

Question

Hi,
we´ve got a sql statement which looks like that:
SELECT BplSegment.SalesOrg, WeeklyBplDataMeta.Line
FROM BPLSEGMENT BplSegment
LEFT OUTER JOIN BPLDATA WeeklyBplData
INNER JOIN BPLDATAMETA WeeklyBplDataMeta
ON WeeklyBplDataMeta.PKey=WeeklyBplData.BplDataMetaPKey
ON WeeklyBplData.BplSegmentPKey=BplSegment.PKey
And WeeklyBplDataMeta.Sheet='SegmentSummary'
And WeeklyBplDataMeta.Line IN ('TotalSalesPlanned','TotalCostsPlanned','TotalQtyPlanned','ROI-BplPlanned')
and BplSegment.SalesOrg=N'0001'
WHERE BplSegment.BplMainPKey= '0010000000391eog'
And BplSegment.SysPeriodPKey= '0010000000387wvy'
The result of the query is wrong. It seems that the part WeeklyBplDataMeta.Line IN ('TotalSalesPlanned','TotalCostsPlanned','TotalQtyPlanned','ROI-BplPlanned') is not executed in plan.
Wrong Plan:
!http://img213.imageshack.us/img213/4500/planl.png!
If we delete the bold part of the statement we receive the correct data! The IN (TotalSalesPlanned, ...) part is then executed in plan.
Correct Plan:
!http://img204.imageshack.us/img204/7740/plan2h.png!
Why is the condition and BplSegment.SalesOrg=N'0001' so significant to the plan?
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
Thx,
Alex

Answer 1

Well, this is a bit hard to follow.
When you say "The result of the query is wrong." do you mean the actual data returned from the query, or just the access plan of the query? I would assume the latter based on your query plan posting, but i'm really not sure.
Also, it's not that i don't believe you, but i don't typically believe TOAD, ~insert front end tool here~, etc... when it comes to things like this. Can you provide the results using a copy/paste from SQLPLUS?
An example would be (which you would run for BOTH statements you have) ...
SQL?ALTER SESSION SET STATISTICS_LEVEL = ALL;
Session altered.
--YOUR QUERY WOULD REPLACE MY EXAMPLE QUERY
SQL?select *
from t1
where col1 = 100;
  2    3 
      COL1      COL2
       100         0
SQL?SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(NULL, NULL, 'ALLSTATS LAST'));
PLAN_TABLE_OUTPUT
SQL_ID     7z61ytum3h786, child number 0
select * from t1 where col1 = 100
Plan hash value: 2347959165
| Id  | Operation              | Name  | Starts | E-Rows | A-Rows |   A-Time   | Buffers |
|   1 |  TABLE ACCESS BY INDEX ROWID| T1    |        1 |         1 |      1 |00:00:00.01 |         4 |
|*  2 |   INDEX UNIQUE SCAN         | T1_PK |        1 |         1 |      1 |00:00:00.01 |         3 |
Predicate Information (identified by operation id):
   2 - access("COL1"=100)
18 rows selected.
SQL?Also, when posting, if you use the tags you can preserve the formatting of your code so it's easier to read.