Time dimension and 1h periods

Hi All,
1. I'm new to OWB and I was wondering is there any chance to force default (made using wizard) time dimension to have 'smaller' level then one day (let's say 1h) ?
If not, have you tried to manually update the dimension & mapping ?
Or it is better to leave default dimension and start with my own time dim ?
2. What's the difference between dimension created as 'time' dimension and dimension with similar content but defined as typicall dim ? (any performance/analysis issues?)
Thanks in advance.
Cheers,
B

Hi Carsten,
Thanks for reply.
Carsten Herbe wrote:
Have you considered using a date dimension on day level and a second time dimesion containing only the hours 1-24?It seems to be a good idea. I'll try this.
Using the wizard does make live easier, but there is no performance advantage compared to a normal dimension. Great. Wizard's time dimension contains much more fields then I'd suspect thus I want to avoid situation when I make simple time dim at the begining and after some time I find out that there' s something important missing ;)
Thanks for help.
Cheers,
B.

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Time Dimensions and Logical dimension "..that not join to any fact source"

Hi Guys,
I get the following error on the ANSWERS front end:
Error Codes: OPR4ONWY:U9IM8TAC:OI2DL65P
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data - date - date
year month
day
[see screen print|www.metallon.org/test/foreign.jpg]
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Hello wildmight.
I followed this tutorial:
http://www.rittmanmead.com/2007/04/30/obi-ee-time-dimensions-and-time-series-calculations/
Why should this layout not work?
Do you have a better idea?
When you say "it has to be one table" do you mean
that quartermonthday and year need to be ONE?
I just rememered that Oracle Hyperion Planning has to have
time and months seperated.
Hello mod100.
What do you mean hierachy over the time dimension?
Is it not obvious from the screen print that I have a hierachy
i.e. yeartotal - years and
quarters - months- days.
I read that by default the LEVELS are set to the lowerst. so thats fine. I set them by myself to the lowest as well but the ERROR is still the same.
no, I have not set the levels as in
http://obiee-tips.blogspot.com/2009/10/logical-levels.html

Time Dimension and database 8.1.7.3

Hi,
I imported owb_bp project that is located in: <OWB install directory>\owb\misc\time directory into my OWB. Then i copied the standard time dimension and mapping from that project to my project. I changed the necesary things(removed day level, did reconcile inbound on a dimension in a mapping with "match by bound name" strategy) in the dimension and mapping and when i tried to deploy the mapping i got an error:
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Time dimension and chronological key

HI ALL
I WORK ON OBIEE 11G REPORTS
WHAT IS THE EXACT USE OF TIME CHECK BOX AND CHRONOLOGICAL KEY??
AND HOW CAN I USE IT
ANY HELP ??

Hi,
What is the chronological key use?
A. Typically time dimension differs from all other dimensions in one way and that is,
all other dimensions dont care about the order of the values in it.
e.g. in region_dim the values are north, south, west and east. Here nobody wants to see whether north comes first or south comes first. i.e. no order is required here.
in the case of time dimension there needs to be a particular order for all the values present in it.
e.g. 2010 is earliest and 2004 is older. Dec-10 is earliest and jan-10 is older. i.e. the values in the time dimensiion needs to follow a particular sorting order. So the chronological key is the key which tells the obiee that the data is incrementing based on the chronological column.
Here you may get another doubt. i.e. you are having columns like year, half_year, quarter, month, week and day. Here which one should become the chronolgocial key?
Analyse it yourself. If you kept year as chro key then obiee will be confused whether jan-10 is earliest or feb-10 is earliest. Because it knows only that 2010 is earliest and 2009 is older.
So always it should be the lowest level oif the dimension which needs to be the chronological key. In the abouve case it should be date.
You can select either date or date_id(this could be a sequence generator values).
2. what is the use time dimension?
A.If all you want is to achieve drills from Month, Quarter and Year then treat it as a normal dimension and create the levels. But if you want to do calculations like YTD, QTD and MTD then you need to create a time dimension.
http://oraclebizint.wordpress.com/2007/11/05/oracle-bi-ee-101332-understanding-todate-and-ago-achieving-ytd-qtd-and-mtd/
Refer the above link for time dimension.
Award points it is useful.
Thanks
satya
Edited by: Satya Ranki Reddy on May 2, 2012 12:29 AM

Difference between Time dimension and product(regular) dimenstion

Hi All,
I would like to know what is the difference between time dimenstiona and regular dimenstion. How can we differentiate and how Oracle bi server knows a dimension
as Time dimenstion.
Thanks,

Hi,
By using Logical Dimensional Structure and chronological keys it identify time or other types of dim.
Just double clik time dimension then you can find the
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Deva

Locking Periods using the Second Hierarchy in the Time Dimension

Hi,
They are not usiing work status for this...
I am at a client, and they used the second hierarchy in the time dimension to lock periods. If they left the second hierarchy blank, no data can be written to it. To open the open the period, they code the Second Heirarchy with CONS_OPEN. Just wondering if anyone has information on this?
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Dear Kacper,
the way I understood, there are two separate questions in this post, namely:
I'm using a shared resource in multiple actors, and the code accessing the resource can take quite some time to execute. How can can I ensure this does not mess up the timing of one or all accessors?
I'm using a shared resource in multiple actors, and the code accessing the resource can generate errors if I try to access it from multiple places. How can I ensure synchronization between all accessors?
As for the first question, the optimal solution to separate the resource prone to timing issues in a different thread/actor. Put anything that is not strictly timed (file access, network comunication) in a separate loop. For each actor, you will get queue references to communicate with, so instead of logging the measurements in the actors where they are made, just queue them up for a different loop to process.
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Multiple Fiscal Calendars Displayed in Subject Area Time Dimension

Hi all,
Thanks for taking the time to review my post.
Environment
Oracle BI Applications 7.9.6 Financial Analytics
Oracle E-Business Suite 11.5.10
Query
The Time dimension on my Subject Areas (Financial Analytics) are showing more period data than I expected.
I have configured one Enterprise Calendar (WPG_Calendar) that I set in the DAC parameters - $$GBL_CALENDAR_ID (WPG_Calendar~Month) and $$GBL_DATASOURCE_NUM_ID (4). The warehouse Enterprise Calendar table W_ENT_PERIOD_D is populating with the periods as configured in EBS for that calendar(Jan-09, Feb-0, Mar-09, etc). I noticed that the Multiple Fiscal W_MCAL_PERIOD_D table is also been populated with the Enterprise Calendar data PLUS, the Seeded EBS calendar (JEBE_MONTH_VAT) and a generated Calendar that appears to be a 5-4-5-4 Calendar (Jan-01-09, Jan-02-09, Jan-03-09, etc). The trouble is these W_MCAL_PERIOD_D periods and dates are all coming through in my Time dimensions and make it confusing for the Answers Users when choosing a Time dimension.
Also, for columns W_CURRENT_MCAL_PERIOD_CODE, W_CURRENT_MCAL_QTR_CODE, W_CURRENT_MCAL_YEAR_CODE there are rows with Current, Previous and Next populated that span these different periods as you would expect, but I'm concerned these return multiple rows for Filters Current Fiscal Quater, Current Fiscal Year.
Funnily enough, W_CURRENT_MCAL_MONTH_CODE has nothing populated (NULLs for all rows).
Your comments are most welcome.
Kind Regards,
Gary.

The filtering of the calendar can be done directly on the logical layer.
for the logical dimension "Dim - Date Fiscal Calendar", Logical Table Source "Dim_W_MCAL_PERIOD_D_Fiscal_Period"
set the content as :
"Oracle Data Warehouse".Catalog.dbo.Dim_W_MCAL_PERIOD_D_Fiscal_Period.MCAL_CAL_WID = VALUEOF("MY_MCAL_WID")
and setup the repository variable MY_MCAL_WID to match with your calendar wid.
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Non-additive time dimension

Hi, I have an issue modelling the time dimension for one of our facts (employee counts). The problem is this - when a user says "I want to see the count of employees for a given time period" - what they mean is that they want to see the count of employees as of the last day in that time period. i.e. "June employee counts" means employee counts as of 6/30, "Year 2000" employee counts means as of 12/31/2000.
This is very similar to modelling a "ending balance" inventory type problem in OBIEE.
I've solved this (poorly) in OBIEE by changing the aggregation to use "LAST" for the time dimension and "count(distinct(emplid))" for everything else. This works....but....the performance is horrible. If I ask for employee counts for year 2000, it appears to bring down employee counts for all 365 days in the year, then sorting them by date, then throwing away all except the last date. In other words, it brings back 364 days worth of records and then throws them away. This makes the query perform absolutely terrible. A 2 or 3 second query ends up running for minutes.
Does anyone have a different way to solve this issue?
Thanks,
Scott

Hi Christian - agree completely, I just wish OBIEE were smart enough to do the "last" bit on the 2000 row time dimension instead of the mutli-million rows fact table...
I've thought about trying to materialize the measures, but I have a hidden "twist" on my data. In our fact table, I do NOT write a record for each day for each employee. Instead, I only write a record when something on the employee fact changes. So instead of having a hard "date" column, I instead have a "start date" and "end date", and then need to join to the reporting date dimension using a BETWEEN. I do this because most records stay unchanged for long periods of time, so instead of 365 records per employee per year, I average under 3 records per employee per year.
I may give the multiple fact LTS a try, but truthfully I'm a big believer in simplicity (mainly because I'm lazy....) so was trying to find something easier.
And honestly, I'd use a cube if I could, I'm a (very) old Express wiennie.
Thanks,
Scott

Create report with time dimensions

I want to add the following dimensions in the extend report: calendar, period (Week, Month, Quarter, Year), compare to (Prior Year, Prior Period).
I have made some researchs and I have consulted oracle metalink but without succes.
I will be grateful if someone can indicate me where to find a concret example of the creation of time dimensions
Regards

Refer OBI Administration Guide, for creating Dimensions (includes Time Dimension Concepts)
Following link contains the example for implementing Time Dimension:
http://www.rittmanmead.com/2007/04/30/obi-ee-time-dimensions-and-time-series-calculations/
Hope it will help you..

Dynamic Time Dimension

Hi,
I've a problem during the set up of the Time Dimension of my Planning Application.
The structure of this dimension is the following:
Year
Months (grouped in 4 different quartes)
Days (grouped in different weeks per month).
My purpose is in having a dynamic dimension time which cross year dimension and update
days and weeks in relation to the year.
Can anyone help me?

It's been quite awhile since i personally created a planning app. but from what I remember, I believe there were essentially 3 options.
I believe there was a 52 week option, and a monthly app, and also a custom. (I dont remember there being a 'day' selection, someone please correct me if i am wrong).
Create an app with a custom # of periods, and enter 366 (includes leap years)
Your periods are going to be numbered P01-P365. So you will have to rename these.
Go ahead and then add the structure you want (in weeks, months and quarters), by adding members via planning web, You wont be able to move the level 0 members, so you have to create the upper level members and group them manually by specifying what time periods encompass each week/month/quarter.
Its a lot of manual work up front. I could be mistaken in the options which create days/weeks/months/quarters rollup, because its been awhile but even if that doesn;t exist just create a custom time dimension and put the structure around the level 0 members which it creates for you.
keep in mind that with a time dimension 366/367 members large, your block size is going to be massive, and will slow down performance.

Fiscal Year Time Dimension - Month Time Span

I have a need to create a fiscal year time dimension and I created using Time Wizard in OWB. When I was developing BI Reports, I found some inconsistencies in Time dimension as it was showing figures in all the months of my first quarter of new financial year that Apr 2009 – Mar 2010. On close inspection of Time Dimension table I found that fiscal_month_time_span value varies from 35 to 28 to 29 for different months. i.e. it’s not matching with corresponding Calendar month. This means I am unable to plot data correctly using fiscal year dimension.
Maybe this is how it works in Oracle, but this does not solve my problem. Could anyone give me some solution for this ? My Fiscal year is from ‘1- Apr – 09’ to ’31-Mar-10’. In my reports I would like to see transactions for April month when I use month attribute of time dimension like it happens in Calendar time dimension.

May be someone from
Forum: Business Intelligence Suite Enterprise Edition can answer this .
Please post it there.

Modifying Existing Time Dimension

Hi All,
Presently I have a Time Dimension and a Fact table which has a FK to this Dimension. The Time Dim has a level upto hourly values.
Now it's in production and I need to change the Time Dim to take on minutes 'cause some reports need minutes.
1. So what is the best way to go about this?
2. Is it better just to add another extra field which has the required date, in the fact table?
3. How can the existing data be easily ported to the new Time Dim(if it has a minute-level)?
Thanks,
Justin.

I am wondering how you implemented the time dimension which only has a level up to hourly values. Do you mean the time dimension only has 24+1 = 25 rows? Usually the time dimension is separate from the date dimension and its lowest level values are minutes or seconds, depending on the business requirements. Therefore the time dimension should have 24X60 + 1 or 24X60X60 +1 rows.
The solution is depended on what you want.
My suggestion is as the follows:
1.     Create a new time dimension with the desired lowest level values (minutes or seconds).
2.     Create or modify the foreign key of the fact table to point the new created time dimension.
3.     Modify the ETL mappings.
4.     Option 1: If you want the new functionality available for the existing rows in the fact, you have to reload the fact no matter which approach you use.
Option 2: If you only want the new functionality available for the subsequent refresh load, you can modify the foreign-key values pointing to the old time dimension to the new time dimension, using the rule XX --> XX:00 or XX --> XX:00:00 (where XX is the hour number in the old dimension). In the subsequent refresh load, map the foreign-key values to the actual time.
Maybe other else can provide better solutions. IF so, please let me know.
Good luck!

Problem with drill down in time dimension - OBIEE 11G

Hello There,
I have a problem with drill down in time dimension. The hierarchy for time dimension is " Fiscal Year---> Fiscal Quarter---> Month(Name)--->Date". When I select a Time dimension and click results its getting opened in a Pivot table view. The problem here is, when I click the "Total" its getting drilled down to Year ---> Quarter but when I click on "+ sign next to quarter" it should drill down to month for that particular quarter for that particular year but its drilling down to month for that particular quarter for all years.
Any suggestions are much appreciated.
Thanks,
Harry.

1.) Congrats for resurrecting a year-old thread.
2.) Your answer is here: "Check the level key of the quarter level...it should include both quarter and year columns. Since a specific quarter occurs every year, quarter column alone can't be used as the level key."

How to build dynamic time series for the time dimension

I am planning to build dynamic time series using rule file instead of manually.Please let me know if there is any property need to assign to enable DTS property for TIME dimension.
Edited by: 844104 on Mar 14, 2011 3:37 AM

In the load rule in the dimension build settings you would need to go to the tab dimension definition, choose the time dimension and right click on it. Select Edit properties. If you have not done so, set the dimension to be the time dimension. Then go to the generations/levels tab and set the generation names you need. For example if you want YTD, you would set the generation name to Year, if you want QTD set it to Quarter. You would set the number to the generation number that coorisponds to the generation. The DBAG has the list of names for all of the DTS members.

TIME_DSO_1 attribute in Time Dimension

Hi,
We are using Oracle Analytic Workspace Manager version 10.2.0.3.0A for creating a cube.
We have defined a dimension as "Time" dimension and have also specified the dimension type as "Time".
This dimension has the levels: Year, Quarter, Month, Week and Day. These levels are for the one and only hierarchy of the Time dimension.
The attributes of the dimension (applicable to all the levels) are: END_DATE, LONG_DESCRIPTION, SHORT_DESCRIPTION, and TIME_SPAN.
In this structure, we are having a strange observation : During the process of defining this TIME dimension, there were some problems with the machine (it got hanged) and so we had to exit (kill) the AWM and come in again. When we logged in to AWM again, we could see a new attribute called TIME_DSO_1 defined within the Time dimension by itself.
Can anyone let us know what is this attribute all about ? And can we go ahead and just delete this from our dimension structure without creating problems for ourselves?
Many thanks in advance for the kind inputs of the forum.
Regards,
Piyush

Hi,
I can't say that I really understand how your data shows up, but I do see an error in your hierarchy.
What you should do is split it up into two hierarchies.
Year-> Quarter-> Month-> Day
and
Year-> Week-> Day
And here is the reason:
A day can easily have a week as a parent and month. But week cannot. Since a month can end on any given day in a week, that means that a week can have two parents. If I take the next week as an example. Mon, tue, wed, thu and fri would belong to the august month, while the rest of the week would belong to september. But the entire week would still be week 35. And its the same issue with quarter. Months can be added into a quarter, but weeks can not.
Now, I'm not sure if this would solve all your problems, but there might be a few other things you might check out and thats what ID's you populate your member fields with.
say that you have used the month numbers (or at least the same id for every january and so on)to populate your months. If that is the case things will also behave extremely weird and slow. What you need to do is to create unique IDs for every month (and any other level) so that you are sure that january 2007 don't have any child records that really should belong to january 2006.
As a general rule, the member field needs to contain a completely unique value across on from all levels. The "generate surrogate key" functionality helps you a bit along the way as it adds the name of your level in front of the value that you load. If the values you load doesn't have unique values within the level it won't help you any.
Hope this can help you some more... ;)
regards Ragnar

Time dimension and 1h periods

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