SCD Type 2 in ODI

Hi
How to achieve SCD Type 2 in ODI.
What are the process to be followed.
Thanks.

hi guru,
Oh is it
yesterday night i seen that he introduced Mr.SCD later i thought to go in day time
My bad , now it was not working he he he he
So,i have to work in night times on SCD ;)
thanks,
saichand.v

Similar Messages

ODI - SCD Type 2 - Insert new row error

Hi All,
For Dimension I have a surrogate key, a natural key, and a column with "overwrite on change", start_date, end_date, current_record_ind. When I run the interface with the default SCD Type 2 for SQl server, this runs fine. But when I change that one column from "overwrite on change" to "insert new row", it fails on the update step. What should I be looking for anf fixing.
Thanks for your time and help.

DB: SQL Server 2008.
IKM = IKM MSSQL Slowly Changing Dimension
Error Message: ODI-1228 - Incorrect syntax near the keyword from.
Code: update T
set
from database.dbo.Dim_type as T,
database.dbo.I$_Dim_type as S
where T.Cd = S.Cd
and T.Current_rec_ind = 1
and IND_UPDATE = 'U'
To overcome the issue, I have commented the update code in the Knowledge module and the insert works, but for this one it is ok, but I have requirements where one column needs to be overwritten and other column changes will require to add a new record. How to handle both?
Thanks for your time.

SCD TYPE 2 in ODI 11g-error in INSERT CHANGING AND NEW DIMENSIONS

Hi Guys,
Im using IKM:Oracle Slowly Changing Dimension to achieve SCD TYPE 2.
It is working fine for Overwrite on change.
But whenever there a new insert upon change(Add Row on Change) in source, throwing below error:
ODI-1228: Task INT_EMP_SCD_TYPE (Integration) fails on the target ORACLE connection ORA_DEV_EDW.
Caused By: java.sql.SQLIntegrityConstraintViolationException: ORA-00001: unique constraint (DEV_EDW.EMP_KEY) violated.
I have unique key in target table column SAPID.
How to overcome this issue.
quick help would be highly appreciated.
Thanks,
Sreedhar S,
<telephone number removed by moderator. this is a publicly viewable forum, not Oracle technical support>

Hi Sreedhar,
As said in the error message, you have an unique or primary key on one column and you try to insert a value already existing. This is a design issue.
You have to ensure that you don't try to re-insert existing value for the column(s) with the key.
Regards,
Jerome

SCD Type 2 Conversion

Hello, I am converting to OWB. The existing ETL has some support for SCD Type 2. It does not support Triggering attributes, however if the ETL determines that the Business identifier no longer exists in the source table it will set a Status attribute to I (for inactive) in the target table.
I assume that I can program this logic in OWB using an SCD Type 1. However, if possible I would like to take advantage of OWB's native support for SCD Type 2. Is it possible to define a SCD as Type 2 but not identify any Triggering attributes? If so, can OWB detect when the Business identifier no longer exists in the source table and update the Expiration Date in the target table? If so, can I modify the logic that updates the Expiration Date so that it also set's the Status attribute to I (for backwards compatibility)?
I may have to resort to a SCD Type 1 and program the update to the Status attribute. However, if I could use OWB's native support for SCD Type 2, I would be in a position to introduce Triggering attributes as the business need arose.
Thank you for your help.

Hi,
several years ago Oracle published whitepaper which described steps for designing OWB mappings for loading SCD (types 1,2,3) tables.
But recently (after website reorganization) this whitepaper was removed, although you can stil find it by googling with "scdwhitepaper",
or you can directly download it from http://sourceforge.net/projects/owbland/files/Stuffs_from_Oracle_site/SCDWhitePaper.zip/download
Also it is available for download OWB experts which implement generation of SCD2 mappings according this whitepaper:
http://odi-ee.blogspot.com/2009/02/scd-type2-expert-table-operator.html
http://owbexpert.blogspot.com/2008/12/hallo-hallo.html
Also look at this thread {message:id=4336731} with discussion of bug which force to update all rows in target table, even they not changed between mapping executions.
Regards,
Oleg

SCD type 2 and 3 for Relational Dimension?

SCD type 2 and 3 for Relational Dimension?
==========================
Thanks for your replies.
I searched this forum and web on SCD 2 and 3 implementation using Relational Dimension (Table) using OWB.
I find some thread talks about implementing Oracle Dimensional structures, which has levels/hierarchy etc.
If we design our dimension in pure relational fashion, how do we go about using OWB for SCD 2 and 3?
Are there any new SQL features of 11g to help us here?
Thanks in helping.
RI

Hi,
several years ago Oracle published whitepaper which described steps for designing OWB mappings for loading SCD (types 1,2,3) tables.
But recently (after website reorganization) this whitepaper was removed, although you can stil find it by googling with "scdwhitepaper",
or you can directly download it from http://sourceforge.net/projects/owbland/files/Stuffs_from_Oracle_site/SCDWhitePaper.zip/download
Also it is available for download OWB experts which implement generation of SCD2 mappings according this whitepaper:
http://odi-ee.blogspot.com/2009/02/scd-type2-expert-table-operator.html
http://owbexpert.blogspot.com/2008/12/hallo-hallo.html
Also look at this thread {message:id=4336731} with discussion of bug which force to update all rows in target table, even they not changed between mapping executions.
Regards,
Oleg

Creating a SCD type 2

Hi All,
Can anyone tell me the procedure to do a SCD type 2 in ODI. Please list me the steps. I tried doing it myself but it seems to be not working. Especially the Sequence generator. The surrogate keys are not getting generated and nor the values getting updated. I tried to look for the solution or examples in the internet but without success.
Thanks in advance

For a better performance, you can use a Query transform before Table Comparison, use the primary key fields (that you use inside Table Comparison) in the Order By tab of the Query transform and select the option Sorted input in Table Comparison transform.

SCD Type 1

Experts can help me please with step by step to load a dimension table using the SCD Type 1 method.
I'm new in ODI and gave me this task in my work.
Beforehand thank you to everyone who can help me.

thanks for your input, however I do not understand some concepts.
I created a dimension table with the following structure:
DIMENSION_KEY = surrogate key?
TOTAL ID = How to Quit?
TOTAL_COD_NEGOCIO = constant
TOTAL_DESCRIPCION = constant
MONEDA_ID = key size should be =
MONEDA_COD_NEGOCIO = natural key (currency code)
MONEDA_DESCRIPCION = Expression that returns the name of the currency
This table would be my currencies dimension two levels (total - currency) as it as it does with OWB.
I need to do is an interface to load this dimension with SCD Tipe 1, ie, not save the record.
Try doing it with the following knowledge modules:
IKM Oracle Incremental Update (PL SQL)
Oracle CKM
But I load 77 rows
This is what I intend to achieve. This dimension of design and loaded with OWB.
Dimension_key l Total_id l Total_codnegocio |Total_Descrip |Moneda_ID|Moneda_codnegocio |Moneda_descrip
l l | | | |
-1 l -1 | 99999 | moneda | | |
2 l -1 l 99999 | moneda | 2 | CLP | Peso Chileno
3 l -1 l 99999 | moneda | 3 | USD | Dolar USA
Beforehand thank you for your support and attention they've given me.
Greetings.

Implementing SCD-1 and SCD-2 in ODI

Hi all,
Please tell how to implement SCD-1 and SCD-2 in ODI?
Regards
Chandra

I guess SCD-2 should be implemented in following way.
1) Change your data store olap type to "Slowly changing dimension"
2) Go to list of columns that were reversed.
3) Right click on the column on which you want to mplement SCD
4) Go to description. Change Slowly Changing Dimension behaviour accordingly.
5) I guess these option will be used by the KM.
I havn't tried this. Let me know if you succeed.
Regards,
Amit
Edited by: amitgupta1202 on Aug 18, 2009 1:06 AM

Error in merge statement when trying to impliment SCD type 2 using merge...

Hi ,
I'm trying to impliment SCD type 2 using Merge using below blog as reference but sime how it is erroring out with error
http://www.made2mentor.com/2013/08/how-to-load-slowly-changing-dimensions-using-t-sql-merge/
Msg 207, Level 16, State 1, Line 40
Invalid column name 'Current'.
Msg 207, Level 16, State 1, Line 38
Invalid column name 'Current'.
Msg 207, Level 16, State 1, Line 47
Invalid column name 'Current'.
Here is the code below...
--Create Temporaty table to hold dimension records
IF OBJECT_ID('tempdb..#DimVirtualQueue') IS NOT NULL
DROP TABLE #DimVirtualQueue;
CREATE TABLE #DimVirtualQueue
( [VQ_name] [varchar](50) NULL,
[contact_type] [varchar](50) NULL,
[center_node_id] [int] NULL,
[sed_id] [datetime] NULL,
[eed_id] [datetime] NULL,
[insert_date] [datetime] NULL,
[Current] [char](1) NOT NULL
INSERT INTO #DimVirtualQueue(VQ_name, contact_type, center_node_id, sed_id, eed_id, insert_date,[Current] )
SELECT VQ_name, contact_type, center_node_id, sed_id , eed_id,GETDATE(),'Y'
FROM
( --Declare Source and Target tables.
MERGE dbo.tblSwDM_dim_VQ_test AS TARGET
--Source
USING (SELECT
RTRIM(LTRIM(Stage.RESOURCE_NAME)) AS VQ_name,
'Unknown' AS contact_type,
0 AS center_node_id,
CONVERT(INT,CONVERT(VARCHAR(8),GMT_START_TIME,112)) AS sed_id,
CONVERT(INT,CONVERT(VARCHAR(8),ISNULL(GMT_END_TIME,'2070-01-01'),112)) AS eed_id,
GETDATE() AS insert_date
FROM dbo.tblGenesys_stg_RESOURCE_ Stage
WHERE resource_type = 'queue'
AND resource_subtype = 'VirtualQueue'
AND NOT EXISTS (SELECT 1 FROM dbo.tblSwDM_dim_VQ AS dim
WHERE RTRIM(LTRIM(stage.RESOURCE_NAME)) = RTRIM(LTRIM(dim.vq_name))) ) SOURCE
ON TARGET.VQ_name = SOURCE.VQ_name
WHEN NOT MATCHED BY TARGET
THEN
INSERT ( VQ_name, contact_type, center_node_id, sed_id, eed_id, insert_date,[Current] )
VALUES (SOURCE.VQ_name,SOURCE.contact_type,SOURCE.center_node_id,SOURCE.sed_id,SOURCE.eed_id,SOURCE.insert_date,'Y')
WHEN MATCHED AND TARGET.[Current] = 'Y'
AND EXISTS (
SELECT SOURCE.VQ_name
EXCEPT
SELECT TARGET.VQ_name
--Expire the records in target if exist in source.
THEN UPDATE SET TARGET.[Current] = 'N',
TARGET.[eed_id] = SOURCE.eed_id
OUTPUT $Action ActionOut, SOURCE.VQ_name,SOURCE.contact_type,SOURCE.center_node_id,SOURCE.sed_id,SOURCE.eed_id) AS MergeOut
WHERE MergeOut.ActionOut = 'UPDATE';
--Insert data into dimension
INSERT tblSwDM_dim_VQ_test
SELECT VQ_name,contact_type,center_node_id,sed_id,eed_id,insert_date,[Current] FROM #DimVirtualQueue
Any help to resolve issue is appreciated...
Thanks,
Vishal..

You need to show the DDL of your target table: dbo.tblSwDM_dim_VQ_test.
Do you have a column named [Current] in this table?

Creating an SCD Type 2 in T SQL without using MERGE

I am attempting to create an SCD type 2 using T-SQL without MERGE (I'm not allowed to use it as a condition of the development work I am doing). I can use a CTE, but I have not tried that yet.
I have a temp table that contains ten records that I am testing with. The following is one variant of the code I have used to try and make this work:
declare
@System_User nchar(50)
,@CurrentDate datetime
,@MaxCheckDate datetime
set @System_User = system_user
set @CurrentDate = getdate()
--INSERT
insert dim.slot
Source_Slot_ID
,Slot_Start_DateTime
,Patients_PerSlot
,IsSlotSearchable
,IsSlotVisible
,[Created_Date]
,[Created_By]
select
src.IdSlot
,src.SlotDateTime
,src.PatientsPerSlot
,src.IsSlotSearchable
,src.IsSlotVisible
,@CurrentDate
,@System_User
from #TmepSlot src
left join dim.Slot dest
on src.IdSlot = dest.Source_Slot_ID
left join (select source_slot_id, max(created_date) as created_date from dim.slot group by Source_Slot_ID) MaxRecord
on dest.Source_Slot_ID = MaxRecord.Source_Slot_ID
and dest.Created_Date = MaxRecord.created_date
where dest.Source_Slot_ID is null
or
src.PatientsPerSlot
<> dest.Patients_PerSlot
or
src.IsSlotSearchable <> dest.IsSlotSearchable
or
src.IsSlotVisible
<> dest.IsSlotVisible
The problem with this variation is that when I change a value in the source like src.Patients_PerSlot, and then run the query, I get the new record i expect, but when I run the query again, a duplicate record gets created.
How do I correctly isolate the correct latest record and add the changed record without inserting that changed record more than once?
Thank you for your help.
cdun2

Hi,
shouldn't you use an inner join between dest and maxrecord like so:
from #TmepSlot src
left join (dim.Slot dest
inner join (select source_slot_id, max(created_date) as created_date from dim.slot group by Source_Slot_ID) MaxRecord
on dest.Source_Slot_ID = MaxRecord.Source_Slot_ID
and dest.Created_Date = MaxRecord.created_date)
on src.IdSlot = dest.Source_Slot_ID
where dest.Source_Slot_ID is null
regards,
Rudolf
Rudolf Swiers
Thanks! I don't remember when I've done a join that way, but it makes sense.
cdun2

SCD type 2 in OBIEE

Hi,
I'm relatively new to OBIEE and trying to implement slowly changing dimension type 2.-- i.e. to look up the correct record in the customer dimension (A_FICC_ACCOUNT) based on the transaction date in the fact table (A_FICC_PROFITABILITY). The customer dimension has two time stamps (start_effective_date, end_effective_date), where end_effective_date will be set to NULL for the most recent record.
So far I've set this up as a complex join in the physical layer, as follows:
A_FICC_ACCOUNT.ACCOUNT_ID = A_FICC_PROFITABILITY.ACCOUNT_ID
AND
A_FICC_PROFITABILITY.DAYID >= A_FICC_ACCOUNT.START_EFFECTIVE_DATE AND A_FICC_PROFITABILITY.DAYID < A_FICC_ACCOUNT.END_EFFECTIVE_DATE
OR
A_FICC_PROFITABILITY.DAYID >= A_FICC_ACCOUNT.START_EFFECTIVE_DATE AND A_FICC_ACCOUNT.END_EFFECTIVE_DATE IS NULL
When i run a report in Answers, the generated SQL is as follows:
select distinct T2327.YEARCAPTION as c1,
T13994.SHORT_NAME as c2,
T13994.RANK_W12 as c3,
T13994.RANK_W52 as c4,
T2327.YEARID as c5
from
DIM_FICC_ACCOUNT T13994 /* A_FICC_ACCOUNT */ ,
DIM_TIME T2327 /* A_FICC_TIME */ ,
FACT_FICC_PROFITABILITY T13406 /* A_FICC_PROFITABILITY */
where ( T2327.SKEY = T13406.TIME_ID and T13406.ACCOUNT_ID = T13994.ACCOUNT_ID and T13994.SHORT_NAME = 'PETEROLA' and (T13406.DAYID < T13994.END_EFFECTIVE_DATE or T13994.END_EFFECTIVE_DATE is null) and T13406.DAYID >= T13994.START_EFFECTIVE_DATE )
order by c5, c2, c3, c4
Ran directly against the (Oracle) database using an SQL client, it gives meaningful results according to the recorded historical changes in the dimension. (see attached screenshot). In Answers, however, the results are not correct (see attached screenshot).
http://dl.dropbox.com/u/3345113/output.jpg
Any tips as to what might be wrong would be greatly appreciated.
best regards
Magnus

Magnus,
As mentioned customer dimension (A_FICC_ACCOUNT) is a SCD type 2, what is the primary key on this table? I don't think it is ACCOUNT_ID alone.
Usually there exists a surrogate key to keep track of any changes, thus it is on this surrogate key a join should exist with a fact table and applying a filter end_effective date is null should produce the correct result.
If the above scenario is not true in your case, do let me know the structure of the customer dimension and fact table (only columns associated with customer dimension), with relation ship information please.
J
-bifacts
http://www.obinotes.com

SCD type 2 in OWB 10g R2

Hello,
I am trying out the SCD type 2 in OWB 10g R2. I have no hierarchies and hence created a dimension with one level. Apart from three business attributes I have 2 mandatory attributes as "EFFECTIVE_DATE" and "EXPIRY_DATE". I have set one of the business attributes to "Trigger History".
I have 3000 rows in the source table. There is no transformation. the data is loaded from source to this dimension directly. One business attribute is loaded using a constant.
When I executed the mapping, all 3000 rows are populated in the target with the expiry date column having null values and current date in the effective date, which is absolutely fine. When I execute the mapping again without changing anything in the source, rows are inserted in to the target with the effective date set to the second run and the expiry date set to previous effective date. As I understand new rows should be inserted only if there is change in the data.
Please correct me if I am wrong. Please clarify and if my understanding is right where am I doing wrong with OWB?
Your help is greatly appreciated
Thanks a lot on advance!
Regards,
Maruthi

Hi Roelant,
I think it is important to be aware that although Paris - 10gR2 - is not actually buggy (in this respect!), it is really quite idiosyncratic in exactly how it processes SCDs.
I followed up on your and Mark's comments, and did an in depth analysis of this topic. It is at http://www.donnapkelly.pwp.blueyonder.co.uk/documents/OWB_10gR2_SCD.pdf
My conclusions are perhaps of interest to anyone considering doing SCD processing with Paris.
I'll be doing a follow-up this weekend, and publishing a sort of 'how-to-do-it' guide.
Cheers,
Donna
Message was edited to add the words: "in this respect"

Implimenting SCD Type 2 using SQL Merge

Hello ,
I'm working on implimenting SCD type 2 to keep track of changes in dim_A with fields as
Table A
VQ_dim_Id , VQ_Name, Contact_Type , Contact_Type, Center_Node_Id , Sed_id , Eed_Id , Insert_date, IsCurrent
Table B
CT_Number, Virtual_Queue , Center_Node_ID , Center, Contact_Type.
Table B acts as source to determine changes for Updates and inserts for Table A . with join condition on VQ_Name and Virtual_Queue ( Which is bad but business rules have no way to determined by ID)
my quesiton is I can update VQ_Name , Contact_Type , Center_Node_Id from Source (table B) , Is there any best practice in place where I can insert EED_Id, SED_id as well in case they are missing in the source... any code snippet to impliment SCD with this
kinda functionality helpful !
Thank you ,
Vishal.

You can use
WHEN NOT MATCHED THEN
INSERT .......
A best example for SCD type 2 Merge join can be found here...
http://www.mssqltips.com/sqlservertip/2883/using-the-sql-server-merge-statement-to-process-type-2-slowly-changing-dimensions/
Please mark as answer, if this post helped you solve the issue.
Good Luck :) .. visit www.sqlsaga.com for more t-sql code snippets and BI related how to articles.

SCD type 2 using merge

Hi ,
I'm trying to impliment SCD type 2 using Merge but unlike typical Merge where you have target and source table, my Inserts come from one table and updates/changes are determined from another table.. I have issue with updates.
below is structure of three tables :
Dimension Table :
VQ_id, VQ_name,
contact_type, center_node_id,
sed_id, eed_id,
IsCurrent, insert_date
VQ_Id is dimension ID based on which Inserts and undates are determined.
VQ_Name : type 1 change
Contact_type , Center_node_ID : type 2 changes
is Current : flag
sed_id , eed_id are start and end effective date ID's
Insert table :
VQ_id,VQ_Name ,Contact_Type , Center_node_ID , Sed_id , eed_id , Insert_date
from the above table, based on VQ_ID , new records are determined .
Updates/history records :
Type 2 changes are tracked based on below table..
VQ_ID, contact_type,
center_node_id, Start_Effective_Date,
CT_ID, Submit_Date
Based on VQ_ID , contact_type, center_node_id,
Start_Effective_Date , end effective date are determined.
Any help in this regard is appreciated...
Thanks ,
Vishal.

-- This is dimension table
CREATE TABLE [dbo].[tblSwDM_dim_VQ](
[VQ_dim_id] [int] IDENTITY(1,1) NOT NULL,
[VQ_id] [int] NOT NULL,
[VQ_name] [varchar](50) NOT NULL,
[contact_type] [varchar](50) NULL,
[center_node_id] [int] NULL,
[sed_id] [int] NULL,
[eed_id] [int] NULL,
[IsCurrent] [bit] NOT NULL,
[insert_date] [datetime] NULL,
[Start_Effective_Date] AS (CONVERT([datetime],CONVERT([varchar](8),[sed_id],(0)),(0))),
[End_Effective_Date] AS (CONVERT([datetime],CONVERT([varchar](8),[eed_id],(0)),(0))),
CONSTRAINT [Pk_tblswDM_dim_VQ] PRIMARY KEY CLUSTERED
[VQ_dim_id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
-- THis ifrom where updates/type2 changes would be loaded
CREATE TABLE [dbo].[tblSwDM_stg_change_control_next_gen](
[row_id] [int] IDENTITY(1,1) NOT NULL,
[VQ_id] [int] NOT NULL,
[contact_type] [varchar](50) NOT NULL,
[center_node_id] [int] NOT NULL,
[Start_Effective_Date] [datetime] NOT NULL,
[CT_ID] [int] NULL,
[Submit_Date] [datetime] NOT NULL,
[isValid] [bit] NULL,
[Remarks] [varchar](100) NULL
) ON [PRIMARY]
Example...
for a Record in dimention table... [dbo].[tblSwDM_dim_VQ]
Before Updates :
VQ_dim_id VQ_id VQ_name contact_type center_node_id sed_id eed_id IsCurrent insert_date Start_Effective_Date End_Effective_Date
2203 376946 Fraud_Span_Det_VQ RFD USCC Detection 4536 20131018 20700101 1 2014-03-21 12:02:42.750 2013-10-18 00:00:00.000 2070-01-01 00:00:00.000
Final Result :
VQ_dim_id VQ_id VQ_name contact_type center_node_id sed_id eed_id IsCurrent insert_date Start_Effective_Date End_Effective_Date
2203 376946 Fraud_Span_Det_VQ RFD USCC Detection 4536 20131018 20140423 0 2014-03-21 12:02:42.750 2013-10-18 00:00:00.000 2014-04-23 00:00:00.000
2605 376946 Fraud_Span_Det_VQ RFS USCC Spanish 4537 20140424 20700101 1 2014-05-07 11:51:00.543 2014-04-24 00:00:00.000 2070-01-01 00:00:00.000

Has anyone ever implemented SCD Type-4 using SSIS??

Hello Experts!!
I have been trying to implement SCD TYPE-4 using SSIS and really got stuck and searched on-line for help. for my surprise, there isn't anything up on this topic.
I know the theory behind SCD Type-4 is to maintain history in seperate tables in a rapid changing dimensions.
please help if any of you ever implemented scd type-4 using SSIS.

Hi,
The stock Slowly Changing Dimension Transformation of SSIS only supports SCD Type 1 and Type 2. For SCD Type 4, it maintains two tables: one to keep the current data, and the other one to keep the historical data. As a workaround, you can also implement
SCD Type 1 via SCD Transformation, and implement Change Data Capture at the same time. SSIS also provides CDC Control Task and related Data Flow components.
References:
http://www.bidn.com/blogs/TomLannen/bidn-blog/2606/slowly-changing-dimension-type-1-changes-using-ssis-scd-component
http://www.mattmasson.com/2011/12/cdc-in-ssis-for-sql-server-2012-2/
Regards,
Mike Yin
TechNet Community Support

SCD Type 2 in ODI

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