Merge rpd problem

Question

I tried merging 2 rpd. The merged rpd's query is not correct, even though it shows the same key, physical and logical joins correctly in the merged rpd, for eg. the following is modified as shown :
original rpd query:
+++Administrator:2b0000:2b0003:----2007/11/28 21:39:42
-------------------- Execution plan:
RqList <<53649>> [for database 3023:3910:hcm89_Local,46] distinct
D1.c1 as c1 GB [for database 3023:3910,46],
cast(NULL as DOUBLE PRECISION ) as c2 GB [for database 3023:3910,46]
Child Nodes (RqJoinSpec): <<53670>> [for database 3023:3910:hcm89_Local,46]
RqList <<53656>> [for database 3023:3910:hcm89_Local,46]
DIM_PERSON.PERSON_NM as c1 GB [for database 3023:3910,46]
Child Nodes (RqJoinSpec): <<53659>> [for database 3023:3910:hcm89_Local,46]
(SELECT * FROM VL_PERSON VALUEOF(NQ_SESSION.MLS_SUFFIX_SQL)) as T5752
DetailFilter: 0 < cast(NULL as DOUBLE PRECISION ) [for database 0:0]
) as D1
OrderBy: c1 asc [for database 3023:3910,46]
+++Administrator:2b0000:2b0003:----2007/11/28 21:39:43
-------------------- Sending query to database named hcm89_Local (id: <<53649>>):
WITH
SAWITH0 AS (select distinct T5752.PERSON_NM as c1
from
(SELECT * FROM VL_PERSON ) T5752
where ( 0 < cast(NULL as DOUBLE PRECISION ) ) )
select distinct SAWITH0.c1 as c1,
cast(NULL as DOUBLE PRECISION ) as c2
from
SAWITH0
order by c1
modified rpd query
+++Administrator:2a0000:2a0005:----2007/11/28 21:45:59
-------------------- Execution plan:
RqList <<52157>> [for database 3023:3910:hcm89_Local,46]
DIM_PERSON.PERSON_NM as c1 GB [for database 3023:3910,46],
sum(FCT_PAY_ERN.REG_ERN_AMT by [ DIM_PERSON.PERSON_NM] ) as c2 GB [for database 3023:3910,46]
Child Nodes (RqJoinSpec): <<52188>> [for database 3023:3910:hcm89_Local,46]
(SELECT * FROM VL_PERSON VALUEOF(NQ_SESSION.MLS_SUFFIX_SQL)) as T5752
FCT_PAY_ERN T7331
DetailFilter: DIM_PERSON.PERSON_SK = FCT_PAY_ERN.PERSON_SK [for database 0:0]
GroupBy: [ DIM_PERSON.PERSON_NM] [for database 3023:3910,46]
OrderBy: c1 asc [for database 3023:3910,46]
+++Administrator:2a0000:2a0005:----2007/11/28 21:45:59
-------------------- Sending query to database named hcm89_Local (id: <<52157>>):
select T5752.PERSON_NM as c1,
sum(T7331.REG_ERN_AMT) as c2
from
(SELECT * FROM VL_PERSON ) T5752,
FCT_PAY_ERN T7331
where ( T5752.PERSON_SK = T7331.PERSON_SK )
group by T5752.PERSON_NM
order by c1
Over and above this some of the reports which used to work are not working now, it throws the following error:
Query Status: Query Failed: [nQSError: 15018] Incorrectly defined logical table source (for fact table Person) does not contain mapping for [Department.Department].
Any help would be of great help!
Thanks in advance

Answer 1

Hm, interesting article.
It posts the error text from the manual
http://download.oracle.com/docs/cd/B19306_01/server.102/b14219/e29250.htm#sthref8601
ORA-30926: unable to get a stable set of rows in the source tables
Cause: A stable set of rows could not be got because of large dml activity or a non-deterministic where clause.
Action: Remove any non-deterministic where clauses and reissue the dml.
Mentions a support request on metalink of someone who hit the error, where the response from support was again the error text from the manual, and adds the helpful hint that modifying the where clause may help as it may not be deterministic.
So we have the error text posted twice and then a paraphrase of the action required, just in case we hadn't got it from the first two times.
There is of course a lot more advertising and colorful images to look at than can be found in the manual.
Maybe Stephanie F. was having a bad day, she doesn't look at all well in the photograph.