Max number of logical table sources

Hi,
I have one logical table based (a fact table) on 8 logical table sources. This is done to simulate some partitioning as my customer does not have an partition set up on data base level.
Anyway my challenge is that a request fired in answers does not seem to take all logical table sources into account when building the physical SQL.
The missing logical table source (the one not being part of the physical SQL) does not differ from the other logical table sources.
Is there a limit of how many logical table sources BIEE can handle under one logical table?
BIEE version: 10.1.3.4

Alastair,
thanks for replying.
The logical tables sources partition the data by year. The aggregation level is the same for all LTS, the check for using this with other sources at this level is set and I've tried to force a result from every LTS (not combined but each LTS for itself). Forcing the results is done by using a dashboard prompt in answers filtering on year.
The whole 'LTS-setup' works in combination with Oracle Warehouse Builder. What I mean by this is the following: In OWB I split the data from one table into 8 different tables, each containing 3 years of data (except for the oldest data where the number of years and amount of data will grow over time).
This is done by comparing values of a year column with the actual year. E.g. the most actual table would contain data for the years 2010 - 2008, the next would contain data for 2007 - 2005, and so on.
Now as the years in the different tables will change, I decided to establish an equaly changing counterpart in BIEE. Basically I defined some repository variables: actaul_year, three_years_ago, six_years_ago, 9_years_ago, etc.
The fragmentation content of the different LTS is defined like this:
most actual data: MyModel.Year.Year >= VALUEOF("3_years_ago")d
next table: VALUEOF("3_years_ago") > MyModel.Year.Year AND MyModel.Year.Year >= VALUEOF("6_years_ago")
next table: VALUEOF("6_years_ago") > MyModel.Year.Year AND MyModel.Year.Year >= VALUEOF("9_years_ago")
etc.
The funny thing is that the missing table is the one containing years 13 - 15. All the other tables (e.g. 16 - 18 years and 19 - 21 years) are represented in the physical SQL. This particular table is not even represented in the physical SQL.
I haven't yet tried to take one of the 'working' tables out to see if this helps (getting an idea if there is a limit on number of LTS per logical table).
Any idea?
Thanks
regards
Andy

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Problem: 1 physical table -- multiple logical table sources

Hi,
I'm quite new to BIEE and setting up my repository.
So I have a question, if the following scenario is possible:
Physical Layer: TABLE_A: COL_A, COL_B, COL_C
TABLE_B: COL_D, COL_E, COL_F
Join TABLE_A.COL_A = TABLE_B.COL_D
In Business Model I have a Dimension Table with TABLE_A as datasource with fields DIM1 (COL_B).
The Fact Table (MEASURE) would have twice TABLE_B as data source with different where-clauses on COL_F and logical table columns (ATT1 and ATT2) of value COL_E.
So far I have created everything and the consistency check shows no errors or warnings, but I get an error in Answer: Incorrectly defined logical table source (for fact table MEASURE) does not contain mapping for [MEASURE.ATT1, MEASURE.ATT2], when I creating an report showing DIM1, ATT1, ATT2.
Isn't it possible to have one physical column used as multiple data source?
I know it 's working, when I create the physical table twice ... but maybe there's a solution for business model.
Thanks
chrissy

Hi mengesh,
that's what I also tried, but it's always returning me the same error.
I know it would work, when I import the physical table twice or more, but that's not what I want to do, because at the end I have 10 or more fields based on this one physical table. There's one field indicating what value is contained in the record, this means:
COL_F | COL_E
1 | customer name
2 | customer number
3 | customer branche
4 | salesman
5 | date
6 | report number
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Logical table source error

I am having a union report.
I have a strange problem. The report executes successfully normally but when I am ordering the columns as per the customer requirement its throwing an error "
A general error has occurred. [nQSError: 15018] Incorrectly defined logical table source (for fact table Fact - tablename does not contain mapping for [case when Dim - Account. Number in (some values)]
none of the report is using any column from the fact table so I don't think that join should exist between fact-dim in this case.
Any other solution one can suggest?

Try to redo the same report with requested order. that would be the simplest way to handle it unless you have hidden hills in your development.
If helps mark
Thanks,
http://cool-bi.com

Incorrectly defined logical table source error

Hey ,I am very new to obiee and getting an error
A general error has occurred. [nQSError: 15018] Incorrectly defined logical table source (for fact table Fact - D) does not contain mapping for [case when Dim - Account. Account Number in ([ 11500, 11501, 11502, 11503, 11504] ) then 'ABC'
Can you tell me how to resolve this issue and what things should I look for

In that case you are not the one to handle the issue.
No point to respond to this post
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ANNOUNCEMENT:Forums Etiquette/Reward Points
~ http://cool-bi.com

Incorrect Logical Table Source getting picked

Dear All,
Can you please help me with my query.
I have 2 logical table sources for my fact table
LTS1 -- L1 with some number of levels mappings
LTS2- L2 with same number of level mappings as L1 with one extra level mapped
now when i query on the columns w.r.t to LTS1, though my LTS 1 is in the higher level in the order of LTS's for fact table, the obiee query is hitting the LTS2 and hence we are getting wrong results.
Can you please suggest on my query.Appreciate your help.
Best Regards,
Achala

I have found the solution. The dimensional hierarchy associated with the Dimension of LTS2 of fact had wrong count set for "Number of elements at this level" in the hierarchy.
the below info from http://gerardnico.com/wiki/dat/obiee/level_number_element
helped me figure out this.
"Fact sources will be selected on a combination of:
the fields selected as well as
the levels in the dimensions to which they link.
For example, when aggregate navigation is used, multiple fact sources exist at different grains. The Oracle BI Server multiplies the number of elements at each level for each qualified source as a way to estimate the total number of rows for that source.
Then, the Oracle BI Server compares the result for each source and selects the source with the lowest number of total elements to answer the query. The source with the lowest number of total elements is assumed to be the fastest.
By adjusting these values, you can alter the fact source selected by Oracle Business Intelligence in some cases."
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Logical Table source source query

In OBIEE 10g we can have multiple logical table sources and we can also add multiple tables into a single logical table source(logical table source source). I wanted to know the difference between doing so and having multiple logical table sources for each logical source.
Hope I made myself clear.
Cheers
Rem

Hi Rem,
When data is duplicated across different physical tables add them as separate LTS with column mapping pointing to most economical sources. Specifying the most economical source is about the idea that a single column exists in more than one table, based on the column mappings BI server picks up those LTS's which could satisfy the request with minimal joins.
When the data is not duplicated add them in a single LTS source. When the physical sources are added in a single LTS, you have the flexibility of using outer joins. But specifying a join as outer join makes BI Server to include this source even if its not required otherwise when the join is inner, the sources will not be included if not required to satisfy the query.
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Filter on the same logical table source on two logical tables is not working properly

Hi,
In the RPD, assume that I have a physical table named Employee_fact, created an Alias called D0 Employee Fact
In the BMM I've two logical tables called Employee_fact_Type1 and Employee_fact_Type2
Each of these logical tables has the same Logical table source - D0 Employee
But in each logical table source, I've a filter in where clause
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for Employee_fact_Type2 employee_type='YYY'
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But, adding the columns from Dept_Type1, Employee_fact_type_1, Tenure_type1 it shows proper filter.
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did you set the content level as well?

Dynamically change the Priority Group of Logical Table Sources in OBIEE 11g

Hi All,
I have 2 Logical Table Sources(LTS 1 and LTS 2 for a Logical Table in BMM Layer).
Example: Logical Table : Sample
LTS Source 1 : Sample 1(Priority Group Set to 1)
LTS Source 2 : Sample 2(Priority Group Set to 0)
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Question on Logical table Sources

Good day!
I would like to ask for your advice on an bottleneck I am experiencing in a repository implementation in Siebel/OBIEE.
I am to create a logical table which sources comes from two different tables(Physical table A and Physical table B).
I am trying to union the contents from table A and table B so I planned to use fragmentation content.
My problem is that there is no way to distinguish the difference between the records coming from physical table A and table B.
I created two logical tables sources and specified the same condition for both but the server would automatically choose the first one and would not include the records from the second logical table source.
Is there any other way I could combine the records from table A and table B in Business Model and Mapping layer?
Please, I would like to know your thoughts.
Thanks,
Ivan

Hi Ivan,
I dont think there is other way which is equable to fragmentation content functionality.
I would suggest to try with any column is not null or most satisfied condition so that both contents present in the query.
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Multiple Logical Table Sources In BMM Under 1 Logical Table In OBIEE 11g

I have a question and even after doing a lot of search on google i could not find any article so through to ask you :-
I want to create a Logical Dimension table
This logical dimension has columns coming from 2 different physical tables, TableA and TableB. The relationship between TableA to TableB is 1 to zero.
There are 2 ways to create the logical dimension :-
1) Go to the logical table source properties of TableA-->then there + sign click and then add TableB right outer join with tableA.
Here in the logical table source we see only one table tableA.
2) Drag the tableB column so that we have 2 logical table source.
Please try this to explain without using the concept of fragmentation and without considering the fact tables. I have this question for simple logical dimension tables only.
I wanted to know which is the right way and what requirement/factor decides what to do ?

Check this post
Business Model - Logical Table Source
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Multiple Logical Table Sources vs Single Logical Table Source

OBIEE 11g. I am totally confused. Can someone help me with the following for me.
I have seen logical table sources being used in 2 ways. I have a 2 sources tables: CUSTOMER & ADDRESS. In physical layer these 2 tables are linked by CUSTOMER _ID in a 1:M relationship. i.e. A customer can have many addresses.
Scenario # 1: In BMM the two tables form a logical table called CUSTOMER with 2 different logical table sources which are CUSTOMER & ADDRESS.
Scenario # 2: In BMM the two tables form a logical table called CUSTOMER with 1 logical table source called CUSTOMER only.
What is the difference between the above 2 scenarios and which one is better to use when creating the logical table source.
Regards.

Scenario # 1: In BMM the two tables form a logical table called CUSTOMER with 2 different logical table sources which are CUSTOMER & ADDRESS.
-->In this case; based on the columns select source is defined in the physical query
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-->Used in DE-normalized scenarios
--> BI uses intelligence based on content tab settings
Scenario # 2: In BMM the two tables form a logical table called CUSTOMER with 1 logical table source called CUSTOMER only.
-->In this case; CUSTOMER properties->General tab used both CUSTOMER & ADDRESS, in your physical query both tables present irrespective of column selection
-->Used in normalized scenarios
-->Forcing BI to follow our way, since we wont set content tab settings
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Time series functions are not working for fragmented logical table sources?

If i remove that fragmented logical table sources, then its working fine.
if any body know the reason, please let me know.
thanks and regards,
krishna

Hi,
is because the time series function are not supported for the framentation content, see the content of the oracle support:
The error occurs due to the fact the fragmented data sources are used on some Time series measures. Time series measures (i.e. AGO) are not supported on fragmented data sources.
Confirmation is documented in the following guide - Creating and Administering the Business Model and Mapping Layer in an Oracle BI Repository > Process of Creating and Administering Dimensions
Ago or ToDate functionality is not supported on fragmented logical table sources. For more information, refer to “About Time Series Conversion Functions” on page 197.
Regards,
Gianluca

Logical table having more than one Logical table sources

Hi ,
Is it possible a logical table has 2 logical table sources and there is no join between the underlying table of logical table sources?
What will happen if we create the request which contains one attribute from each source?
Will BI server return records with Cartesian join?
Is it mandatory if logical table is having more than one logical table sources(exp. Logical table sources are X,Y and underlying table is A,B respectively),
The underlying tables (A&B) must be joined ?
Can someone explain the logic behind the logical table sources? How does it work?
Any reference of document will be appreciable.
Thanks,Ashish

Hi Stijn,
Thanks for response.
You are saying that Oracle BI server will run a query against both tables and combine the results. But if there is no possibilty of any type of join, how BI server will combine the results from both tables.
I have a scenario like below -
Suppose i have 2 tables A and B at physical layer. Both table contains the information of any common subject area.
But there is no attribute is common between A and B so not any kind of join possible between two.
Now if i create a logical table with 2 logical table source A and B and create any request having one column from A and one from B ,
What will happen? How BI server will combine the result? Will BI server not result records after Cartesian join.
How can i model this scenario?

No Fact table Exists and [nQSError: 14070] Cannot find logical table source

Hi,
I have 3 tables A(fact),B(dim) and C(dim). there are some other dims. i am getting Errors here.
A is joined with B and B is joined with C .
1) In report if i pull columns from A and B its giving data. If i include C table Columns in the report i am getting Error like
No Fact table Exists.
2) If i pull the C table columns only in the Criteria i am getting error [nQSError: 14070] Cannot find logical table source
How can i resolve this.
Thanks

In Logical table B source properties general tab ->Click on Add button and add table C and pull required columns from Physical layer table C.
If helps mark for any issues let me know.
Edited by: Srini VEERAVALLI on Feb 13, 2013 6:42 AM

Union of more than 2 fragments/Logical Table Sources in BMM Layer

Hi,
I have come across many blogs which explain how to union two fragments/physical tables in a logical table source.
Currently, i have a requirement where i have to combine/union 4 fragments/physical tables in a logical table source, say T1, T2, T3, T4 dimension tables.
All have the same table structure, but differ in data.
The requirement is to define dashboard prompt on the union of these tables and populate the values from all the tables.
I am able to union two of the tables using a '>' and a '<' condition on a key column.
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Hi Varun,
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Import the tables in the physical layer and create your joins.
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Regards
Adil

Max number of logical table sources

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