Problem creating Database view

Hi ABAP experts,
I have created an ABAP database view with tables /SAPAPO/MATLOC, /SAPAPO/MATKEY and /SAPAPO/LOC.
I am taking snp planner (PLANNER_SNP) and ppds planner (PLANNER_PPS) from table /SAPAPO/MATLOC. I want their descriptions also in the same view which is there in an another database table /SAPAPO/PLANNER. but when i use this table in the join number of entries in the view appears to be zero. I dont know why..
Can anybody suggest me how can I put descriptions of SNP planner and PPDS planner also in the same view.
Also view is getting created with all the fields as key fields by default but I want only three feilds to be the key feilds.
Can anybody help in this matter.
Thanks a lot
Best Regards,
Chandan Dubey

I can't see the structure of these tables but apparently your join condition is not well done. Ensure foreing keys for /SAPAPO/MATLOC exist in /SAPAPO/PLANNER (or vice versa dependig on which table has primary key) . Try doing a view first only with these two tables, then if this works expand it to the two other tables. This will give you an overview were is the logic (relationship) problem.
As for your second question system will suggest key relationship, of which you can delete some relations. In this case you don't need to use all of them but only part of the key fields to be compared. Just select relationship you don't want and delete it. when using this view only these fields will be used to formluate join condition.
I hope this helps you
Marcin

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20 "End_Time", "Close_Date", "Severity_Level" "Level", "Problem_Type" "Type",
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SELECT 'CMR' "Ticket_System",
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EMPNO                                     NOT NULL NUMBER(4)
ENAME                                              VARCHAR2(10)
JOB                                                VARCHAR2(9)
MGR                                                NUMBER(4)
HIREDATE                                           DATE
SAL                                                NUMBER(7,2)
COMM                                               NUMBER(7,2)
DEPTNO                                    NOT NULL NUMBER(2)
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2    from emp;
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initcap( substr( c9.libe, c9.lgnom + 2 ) ) prenom_9,
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ORA-12054: cannot set the ON COMMIT refresh attribute for the materialized view
12054. 00000 - "cannot set the ON COMMIT refresh attribute for the materialized view"
*Cause: The materialized view did not satisfy conditions for refresh at
commit time.
*Action: Specify only valid options.
When I create the materialized view with just CREATE MATERIALIZED VIEW "H6801_GL_00"."VK_CLIENT" AS
it works but the refresh is only "ON DEMAND"...
Can't find how and why it won't work...
Edited by: MacFizz on Dec 17, 2009 3:22 PM

You could try the DBMS_MVIEW.TUNE_MVIEW and check if you can modify you materialized view or "refactor" it in a smaller, fast refreshable part that you could combine later to the sysdate/rownum part of it.
http://download.oracle.com/docs/cd/E11882_01/server.112/e10821/advisor.htm
Explanation on restrictions of fast refresh:
http://download.oracle.com/docs/cd/E11882_01/server.112/e10706/repmview.htm
Below there's an example of a fast refreshable mview, on creating the materialized view log and so on:
http://download.oracle.com/docs/cd/E11882_01/server.112/e10592/statements_6002.htm#i2080820

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