+ All Categories
Home > Documents > Internal and Confidential COGNOS Decision Stream Cognos CoE.

Internal and Confidential COGNOS Decision Stream Cognos CoE.

Date post: 27-Dec-2015
Category:
Upload: daisy-norton
View: 244 times
Download: 4 times
Share this document with a friend
Popular Tags:
131
Internal and Confidential COGNOS Decision Stream Cognos CoE
Transcript
Page 1: Internal and Confidential COGNOS Decision Stream Cognos CoE.

Internal and Confidential

COGNOS Decision Stream

Cognos CoE

Page 2: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Agenda

• Getting Started

• Components of DecisionStream

• Definitions

• DecisionStream Catalog

• Database Connections

• Fact Builds

• Dimension Builds

• JobStreams

• SQLTXT Designer

• SQL Term

• Command Line Interface

Page 3: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Modules

9. Definitions

1. Getting Started

2. Create a Catalog

5. Dimension Builds

6. Job streams

7. SQL Text Designer

8. Command Line Interface

3. Fact builds

4. Data Delivery Modules

Page 4: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Module 1

Getting Started

Page 5: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

• The primary purpose of DecisionStream is to create integrated data marts by:– extracting operational data from multiple sources– merging and transforming the data to facilitate reporting and analysis– delivering transformed data into coordinated data marts

What is DecisionStream?

Page 6: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

The Purpose of DecisionStream

Transformations

OLTP

OLTP

OLTPOLTP

OLTP

-x/y

+

Data

DataData

Integrated

Data Marts

Page 7: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Decision Stream Architecture

Design Client

API Scripts

PlatformsWindowsNT,95,98,

2000Desktop

DecisionStream Process Metadata

Operational Sources

DB2OracleSQL Server

InformixODBCSybaseText

MetaData Targets

ImpromptuTransformerArchitect

Microsoft SSASEssbase

Server Engine

NT or UNIXServerHPUXAIX

SolarisIBM AIX 4.2

COMPAQ TRU64 DE

CIS

ION

ST

RE

AM

DE

CIS

ION

ST

RE

AMCustom

DBMS

Flat FilesFiles

ERP

Page 8: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

3

How DecisionStream Creates Data Marts

DimensionDelivery

5b.

4

Sales1

DimensionalFramework

Product Time LocationDim Data

Sources

2

DataSource

DataSource

Dat

aStr

eam

Dat

aStr

eam

Dat

aStr

eam

Dat

aStr

eam

MetaDataDelivery

5c.

5a.

FactDelivery

Page 9: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

DecisionStream Interface

Page 10: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Interface Objects

• The core elements in a DecisionStream catalog are:

– Builds

– DataStreams

– Transformation Models

– Delivery Modules

Page 11: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Interface Objects (Cont’d)

• The core elements in a DecisionStream catalog are:

– JobStreams

– Dimensions

• Hierarchies and Lookups

• Templates

– Connections

– Functions

Page 12: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

DecisionStream Tools

Page 13: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Module 2

Create a Catalog

Page 14: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

What is a Catalog?

A catalog is a container for DecisionStream metadata.

Page 15: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

• A DecisionStream Catalog provides a central repository for the information that defines how DecisionStream extracts, transforms, and delivers data.

• You can store a DecisionStream Catalog in either a dedicated database or a database that you use for other purposes, such as a target data mart.

• A Catalog consists of a set of data tables that can reside in any database for which DecisionStream has create permissions. You can create only one Catalog per database.

DecisionStream Catalog

Page 16: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Diagram illustrates

• How DecisionStream extracts and transforms data from the data sources and how it delivers data to the target marts

• The flow of data from the data sources to the target data marts

DecisionStream Catalog

Page 17: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Shared Items in a Catalog

• Library items can be used throughout the catalog in a variety of different builds and JobStreams.

• A catalog library consists of:

– Dimensions

– Connections

– Functions

Page 18: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Create a Catalog

You can create a Catalog in the DS_New sample database.

Steps

1. From the File menu, click New Catalog. If you are prompted to disconnect from the current Catalog, click OK.The New Catalog dialog box appears.

2. In the Name box, type MyCatalog and then click Next.3. In the left pane, click ODBC.4. In the Data Source Name box, click DS_New.5. Click Finish.DecisionStream creates the Catalog tables and opens the new Catalog.6. From the File menu, click Save Catalog.

DecisionStream Catalog

Page 19: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Backup and Restoration of a Catalog

• Backup files are useful for recovery and emergency situations.

• Write the catalog tables to an ASCII text file for later recovery.

Page 20: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Creating an ODBC Connection

Steps to define connections to ODBC databases set up for the Great Outdoors Company.

Steps

1. Open the MyCatalog catalog that you created in Chapter 2.2. In the Library, right-click Connections, then click Insert Connection.3. In the Alias box, type GO_Sales4. Click the Connection Details tab.5. In the left pane, click ODBC.6. In the Data Source Name box, click GOScer3.7. Click OK to close the Connection Properties dialog box.

Database Connections

Page 21: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Creating a connection to SQLTXT Database

Steps

1. In the Library, click the Connections folder.

2. From the Insert menu, click Library, and then click Connection.

3. In the Alias box, type DS_Sources

4. Click the Connection Details tab.

5. In the left pane, click SQLTXT.

6. In the Definition File box, click Browse, then select the DS_Sources.def file in the Cognos samples directory.

8. Click OK to close the Connection Properties dialog box.

Database Connections

Page 22: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Creating a connection to Oracle Database

Steps

1. In the Library, click the Connections folder.

2. From the Insert menu, click Library, and then click Connection.

3. In the Alias box, type DS_OracleSrc

4. Click the Connection Details tab.

5. In the left pane, click Oracle SQL*Net.

6. Enter the values for User Name, Password and SQL*Net Service.

8. Click OK to close the Connection Properties dialog box.

Database Connections

Page 23: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Module 3

Fact Builds

Page 24: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

A DecisionStream fact build specifies how to extract, transform, and deliver data. Data may come from multiple data sources,

Each of which has its own naming and storage conventions.

A fact build can• acquire data from one or more data sources• merge and clean the source data• aggregate the data with reference to the dimensional framework• deliver the fact and dimension data to one or more data marts• deliver metadata to OLAP systems and Cognos BI applications

Fact Builds

Page 25: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Deliver

10100101…

The Fact Build Process

TransactionData

Sources

Structure Data

Sources

Acquire Star Join Merge

Transform Aggregate

PartitionFilter

Dimensional Framework

Page 26: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Fact Build Data Elements

Dimension

Measure

Attribute

Derivation

A dimension key or data that is used to qualify a measure.

Quantitative data or values that can be aggregated. These are usually Key Performance Indicators (KPIs).

Additional information that is not a dimension element or measure but that may be of interest.

A calculation or transformation.

Page 27: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Fact Build Wizard

The Fact Build Wizard guides you step-by-step through the process of creating a new fact build.

Page 28: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Types of Fact Builds

Fact build types provide default settings for the delivery of data marts.

Page 29: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

The Fact Build Wizard: Add a Data Source A data source for the fact build is chosen from the available connections. This source contains the transactional data to be transformed.

Page 30: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

The Fact Build Wizard: Create the SQL Data Source

Tables and columns to be read from

SQL statement created

Page 31: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

The Fact Build Wizard: Map to Fact Build Elements

Elements of the Transformation Model

Columns returned from source data by SQL

Page 32: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

The Fact Build Wizard: Modify Attributes

The elements of the Transformation Model are created automatically by the Fact Build Wizard but may need to be modified.

Elements of the Transformation Model

Click here to modify the types of elements

Page 33: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

The Fact Build Wizard: Link to the Dimensional Framework

Dimension elements are related to reference structures.

Page 34: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

The Fact Build Wizard: Fact Data Delivery

Page 35: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Fact Build Visualization

Dimensions associated with the build

Fact and Dimension tables

Metadata delivery to Impromptu, PowerPlay,and Architect

Transactional data sources

Page 36: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

DataStream Mapping Visualization

You can visualize the mapping of the SQL columns to the build elements by clicking the DataStream tab.

Page 37: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Transformation Model Visualization

Use the Transformation Model tab to view the linkage of the dimension elements to the Dimensional Framework.

Mapped Reference Structures

Page 38: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Fact Delivery Visualization

By clicking the Fact Delivery tab, you can view the mapping of the elements to the target fact table.

Page 39: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Delivery Modules

• The three delivery module types are:

– fact

– dimension

– metadata

Page 40: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Steps to Execute the Fact Build

1. Right-click the BIMart factbuild, and then click Execute.The Execute Build dialog boxappears.

2. In the Execution mode box,click Normal, and then click OK.DecisionStream executes theFact build in a commandwindow, writing progressmessages to the screen andexecution log.

3. When the fact build executionIs complete, press Enter to closeThe command window.

Fact Builds

Page 41: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Run a Fact Build

Page 42: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Create a Fact Build Manually

Add a build1

Add and define the build elements

3

Define the source2

SQL columns Build elements

Map the elements to the columns4

Page 43: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Add a Dimension Element to the Fact Build

Insert

You have the option of adding the dimension element to deliveries after the fact table has been created

Associate and Set

Select to roll up to the higher level(s)

Select to include all records to avoid rejected data

Select to use the surrogate, if one is available, as a foreign key

Page 44: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Add a Measure to a Build

Insert and name it

Specify an aggregation method

Specify a merge behavior

Page 45: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

What is a Derivation?

• Derivation is an element that DecisionStream calculates rather than obtains directly from the data source.

• It derives from any build element.

• It is an output-only element.

ProductRevenue = Quantity * UnitPrice

Quantity * UnitPrice

Page 46: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

When to Use a Derivation?

• Use a derivation when:

– a calculation needs to be stored in the data mart to be shared by users

– the calculation is very complex and open to misinterpretation

– certain key performance indicators (KPIs) must be derived

– transformation is required

Page 47: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Operators for Derivations

Logical: =, !=

>=, <=

>, <, <>

IS

AND, OR

[NOT] LIKE

[NOT] BETWEEN

[NOT] IN

NOT ( ……….. )

Mathematical:

– ( )

– +

– -

– *

– /

Page 48: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

General Functions for Derivations

Text

Mathematical

Logical

Type Conversion

Function Type Examples

Char(), Concat(), Trim(), Length(),...

Abs(), Floor(), Trunc(), Round(), Mod()

If(), IfNull()

ToChar(), ToDate(), ToInteger()

Date AddToDate(), SysDate(), DaysBetween()

Control

Member Member(), Level(), IsAncestor()

RowsUpdated(), Exit(), SQL(), LogMsg(),..

Page 49: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Control Statements

StatementsAssignment <variable> := <expression>;

Return return <expression>;

if…then…else…

if<expression>then<block>else<block>

while…do…

while <expression>do <block>

case… case <expression> ofbegin<value1>: <block>default: <block>end

<block> begin<statement>;end

Syntax

Page 50: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

How to Define a Derivation

Test

InsertCalculate

Page 51: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

When to Calculate a Derivation

By default , a derivation is calculated after aggregation.

You can choose to calculate the derivation before aggregation.

MEASURE MEASURE DERIVATION AGGREGATION

Revenue (Quantity*UnitCost)

Quantity * UnitCost AVGRevenue

AverageRevenue

Select the Calculate at Source box if you want to calculate first and then aggregate.

Select an aggregation method

Page 52: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Module 4

Data Delivery Modules

Page 53: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Delivery Process to a Single Data Mart

MetadataDelivery

FactDelivery

DimensionDelivery

Fact Build Delivery Modules Delivery Targets

Data Mart

Page 54: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Fact Delivery Modules

There are two groups of fact delivery modules.

Table delivery modules•Bulk Copy (BCP)

•DB2 LOAD

•Informix LOAD

•ORACLE SQL *Loader

•Red Brick Loader (TMU)

•Relational Table

Nontable delivery modules•Text File

•DataStream

•Essbase Direct Feed

•Essbase File Feed

Page 55: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Fact Delivery: Relational Table Delivery Module

• APPEND

• TRUNCATE

• REPLACE

• UPDATE/INSERT

• UPDATE

Refresh Type:

Commit Interval:

Target database Target table

Indexing options

Elements subscription for delivery

Key option1..

100 commit …200 commit……1000

Page 56: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Fact Delivery: Text File Delivery Module

Output Filenamefull directory path and file name or just file name.

Line/Field DelimiterNL(new line) TAB, COMMA, SPACE, NONE(no delimiter),or a character string.

Elements subscription for delivery

Page 57: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Dimension Delivery in a Fact Build

• In general you should not deliver dimensional data in a fact build. However, there are four exceptions to this rule:

– a demo or proof of concept

– data mart delivery from a warehouse

– dimensional data available only in fact data

– metadata delivery

Page 58: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Dimension Delivery Module

Add Relational Table

Add Dimension Table

Map the data set columnsto the template attributes

Create or select a template for delivery

Type or select a name for dimension table

TemplateAttributes

Page 59: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Metadata Delivery in a Fact Build

Provide a name and define the module properties for each metadata delivery

Page 60: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Metadata Delivery Modules

Specify a source and a dimension delivery for each dimension that you want to deliver

Dimension deliveries

To deliver BI metadata, you must declare dimension delivery modules for each dimension, but you do not need to deliver the dimension data.

Disable dimension deliveries if you do not want dimension data to be delivered through the fact build

Select a fact table and columns from the table that you want to deliver

Page 61: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Partitioned Delivery

Using DecisionStream, you can set vertical partitioning, horizontal partitioning, or both.

Horizontal PartitioningVertical Partitioning

Horizontal + Vertical Partitioning

Page 62: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Vertical Partitioning

Vertical partitioning is performed in a fact delivery by subscribing to the elements to be delivered.

Columns included in Fact Delivery

Columns excludedfrom Fact Delivery

Page 63: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Module 5

Dimension Builds

Page 64: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

What is a Dimension Build?

A dimension build delivers data that describes a single dimension to the data mart. This may take the form of one or several tables.

Levels of the hierarchy

Reference structure to be delivered

Dimension Build

Dimension table

created Target Data Mart

Page 65: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

A dimension build can deliver dimension data for many fact builds. Fact builds can also be used to deliver dimension data,but this may mean several fact builds delivering the same data,resulting in a duplication of effort. Dimension builds deliveronly dimension data.

The main use for dimension builds is to deliver conformed dimensions that form the dimensional reference for coordinated Data marts.

Each dimension build acquires data from a reference structure that you specify and delivers this, as dimension data, to thetarget data mart.

Dimension Builds

Page 66: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Set Up Reference Structures

For each reference dimension that you have set up, you must set up a hierarchy and the required templates. Each hierarchy models a view of the associated business dimension.

DecisionStream supports hierarchies based on

• the columns of one table (star schema)

• multiple tables (snowflake schema)

• the rows of one table (parent-child schema)

• parent-child structures without named levels (auto-level hierarchies)

Dimension Builds

Page 67: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Creating the Product Hierarchy

You create the Product hierarchy fromrelated tables in the GO_Sales database.The hierarchy follows a one-to-manyrelationship between tables.

A product line can have many producttypes, but a product type can haveOnly one product line. Each producttype can have many products, but aproduct can have only one producttype.

Dimension Builds

Page 68: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Steps to Select the Hierarchy Structure

1. From the Tools menu, clickHierarchy Wizard.

2. Click Create the hierarchy frommultiple tables (Snowflake Schema),and then click Next.

Steps to Define the Hierarchy

1. In the Enter the name of thehierarchy box, type Product

2. In the Select the referencedimension to use for this hierarchybox, click Product, and then clickNext.

Dimension Builds

Page 69: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Steps to Define the All Level

DecisionStream provides the option of creating astatic All level at the top of the hierarchy. • Click Next to accept the defaults and create the Alllevel.

Steps to Define the ProductLine Level

1. Click the ALLProduct level of the Producthierarchy, and then click Add. The Level Details window appears.2. In the Name box, type ProductLine3. In the Source database box, click GO_Sales.4. In the Source table box, click Browse for table, andthen double-click the ProductLine table.5. Move each table column from the Availableattributes pane to the Chosen Attributes pane.6. For the ProductLineCode attribute, select the Idcheck box. 7. For the ProductLine attribute, select the Captioncheck box and Click OK.

Dimension Builds

Page 70: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Steps to Define the ProductType Level1. Click the ProductLine level of the Product hierarchy, and then click Add.2. In the Name box, type ProductType and In the Source database box, click GO_Sales.4. In the Source table box, click Browse for table, and then double-click the ProductType table.5. Move each table column from the Available attributes pane to the Chosen attributes pane.6. For the ProductTypeCode attribute, select the Id check box. 7. For the ProductType attribute, select the Caption check box.8. For the ProductLineCode attribute, select the Parent check box. When you execute a build,DecisionStream creates links between a level and its parent by matching the Parent attribute of thecurrent level with the ID attribute of the level above. Then Click OK.Steps to Define the Product Level1. Click the ProductType level of the Product hierarchy, and then click Add. 2. In the Name box, type Product and In the Source database box, click GO_Sales.4. In the Source table box, click Browse for table, and then double-click the Product table.5. Move the ProductNumber, ProductName, and ProductTypeCode table columns from theAvailable attributes pane to the Chosen attributes pane.6. Select the Id check box for ProductNumber and Caption check box for ProductName

attribute.7. For the ProductTypeCode attribute, select the Parent check box and Click OK.

Dimension Builds

Page 71: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Dimension Builds

Steps to View the Product Hierarchy

Visualization

• In the Tree pane, click the Product

hierarchy.

The Visualization pane should look Like this:

The next task is to create the Product

dimension build and use this to

Deliver The Product hierarchy.

Page 72: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

The Dimension Build Wizard

The Dimension Build Wizard guides you step-by-step through the process of creating a new dimension build.

Page 73: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Steps to Create a Dimension Build

1. From the Tools menu, click Dimension BuildWizard. The Dimension Build wizard appears.2. In the Name box, type Product and then click Next. 3. In the Schema Type box, click Star Schema.5. In the Dimension to be delivered box, click Product.6. In the Reference item to be delivered box, clickProduct (H).7. In the Deliver into connection box, click DS_Marts,and then click Next.8. Click Next to accept default naming conventions.9. Click Next to accept the default build features.10. Click Next to accept the default build properties.When using conformed dimensions in a data mart, itis a good idea to use surrogate keys rather thanbusiness keys to reference the dimensions. 11. Select the Add surrogate keys to thedimension tables check box, and then click Next.12. Click Finish to close the Dimension Build wizard.

Dimension Builds

Page 74: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Steps to View the Dimension Build

• In the Tree pane, click the Product dimension build.

The Visualization pane should look like this:

Note that DecisionStream has created a template,

D_Product, which is used the deliver the primary

reference structure.

Steps to Deliver the Dimension Build

1. Right-click the Product dimension build, and

then click Execute.

The Execute dialog box appears.

2. In the Execution mode box, click Normal.

3. Click OK.

DecisionStream executes the dimension build in a

command window.

4. When the dimension build execution is complete,

press Enter to close the commandwindow.

Dimension Builds

Page 75: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Dimension Build Schemas

• One dimension table:

– Star schema

– Parent-child schema

• Several dimension tables:

– Snowflake schema

– Optimal star schema

– Optimal snowflake schema

Page 76: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Star Schema

Date• Order Date• Week• Month• Year

Order Fact• Customer Cd• Sales Rep Cd• Product Cd• Order Date• Order_Qty• Order_Line_Value

Product Name

Product• Product Cd•• Product Type Cd• Product Type Desc• Product Line Cd• Product Line Name

Sales Staff• Sales Rep Cd• Sales Rep Name• Sales Area Cd• Sales Area Desc

Customer• Customer Cd• Customer Name• Customer Type Cd• Customer Type Desc

CustomerType

Customer

SalesArea

SalesRep

OrderHeader

OrderLine

ProductLine

ProductType

Product

Page 77: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Snowflake Schema

Order Fact• Customer Cd• Sales Rep Cd• Product Cd• Order Date• Order_Qty• Order_Line_Value

Customer Type• Customer Type Cd• Customer Type Desc

Customer• Customer Cd• Customer Name• Customer Type Cd

Sales Rep• Sales Rep Cd• Sales Rep Name• Sales Area Cd

Sales Area• Sales Area Cd• Sales Area Desc

Product• Product Cd• Product Name• Product Type Cd

Product Line• Product Line Cd• Product Line

Name

Date• Order Date• Week• Month• Year

A time-based dimension is typically not snowflaked

Product Type• Product Type Cd• Product Type Desc• Product_Line Cd

Page 78: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Parent-Child Schema

••••

Customer••Customer Name• Customer Parent

Order Fact•••••Order Qty•Order Line Value Product

••Product Name•Product ParentOrganization

••Sales Rep Name•Sales Rep Parent

Not a parent-child relationship

Date• Order Date• Week• Month• Year

Order Fact• Customer Cd• Sales Rep Cd• Product Cd• Order Date• Order_Qty• Order_Line_Value

Product• Product Cd• Product Name• Product Parent Cd

Sales Staff• Sales Rep Cd• Sales Rep Name• Sales Rep Parent Cd

Customer• Customer Cd• Customer Name• Customer Parent Cd

Page 79: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

The main tasks required to define and use a Conformed dimension are

. Create a primary reference structure.

. Deliver the primary reference structure using a dimension build.

. Create a secondary reference structure using the dimension data delivered for the primary reference structure.. Associate the secondary reference structure with a fact build.

Dimension Builds

Page 80: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Module 6

Job Streams

Page 81: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Job Control and the Data Warehouse

The basic processes of the data warehouse require automation for the warehouse to function effectively.

Raw Data

Automation of:• Data Extraction• Data Transformation• Data Loading• Exception/Error Handling• Logging/Notification

Target Data Mart

Page 82: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

What Is a JobStream?

• A JobStream is a DecisionStream component used to coordinate data mart management tasks.

• The JobStream Visualization pane helps to understand the JobStream workflow.

Page 83: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Characteristics of JobStreams

• A JobStream is associated to a single catalog.

• Nodes are processed in series or in parallel.

• A JobStream is aware only of objects in its catalog but can call system commands (for example, databuild.exe) that can reference other catalogs.

Nodes within a single JobStream

Catalog-specific JobStreams contained in separate folder

Page 84: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Add a JobStream to a Catalog

JobStreams are added to a catalog and are specific to that catalog.

Enter a name and other properties for the JobStream

Page 85: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Add Variables to a JobStream

Define variables to use when creating procedure, condition, and SQL nodes.

The COUNTER JobStream variable is used in the Counter Test node

Page 86: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Main Components of a JobStream

a fact or dimension build to be executed

tests conditions for branching to other nodes

functions, variables, or actions to be performed

SQL statement(s) to be executed

a container for one or more nodes that can include nested jobs

Build

Condition

Procedure

SQL

Job

Page 87: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Build Node

Add a fact or dimension build node to a JobStream to automate the extract-transform-load process.

Fact build that uses conformed dimensions

Conformed dimension builds

Page 88: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

SQL Node

Use an SQL node to include SQL statement(s) to be executed during the job control process.

SQL statements to create indexes on a fact table previously loaded by the JobStream

Database referenced by the SQL

Page 89: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Procedure Node

Use a Procedure Node to coordinate processing around a build.

The Execution Log procedure writes a message to the log file using the LogMsg function

Page 90: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Result Variable

• All job nodes (except condition nodes) set the Boolean variable RESULT to indicate success or failure.

• Condition nodes check RESULT by default.

• A node may deliver its result to another variable if specified.

Page 91: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Condition Node

Use a condition node to test a condition before executing another JobStream component .

If the condition specified in Counter Test is False, then End Automation Report executes

Page 92: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Job Node

Use a job node to break large jobs into a series of smaller jobs.

If the FactBuild job node is reached, a separate process will run that contains its own logic

Page 93: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Link JobStream Nodes

Each node in a JobStream process must be linked to at least one other node.

The Drop Indexes SQL node will be completed BEFORE the SalesFact build node that it is linked to

Page 94: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Execute Nodes Sequentially or In Parallel

These nodes are run in parallel These nodes are run sequentially

Page 95: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Action on Failure

You can specify what DecisionStream does when a node fails.

CONTINUE: Continue processing the next node

TERMINATE: Terminate the current flow--continue with the next flow

ABORT: Stop ALL processing immediately

Page 96: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Run a JobStream

Page 97: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Module 7

SQL Text Designer

Page 98: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

You use the SQLTXT Designer to configure theSQLTXT definition files used withinDecisionStream to access text files as thoughthey are in an SQL database.

SQLTXT Definition FilesA SQLTXT definition file (.def) defines a virtualdatabase of text file tables. It associates eachTable with a text file in the database directory. Italso specifies the structure of the tables.

Steps to create a SQLTXT definition file

1. In the SQLTXT Designer, from the File menu, click New.2. From the File menu, click Save As.3. In the File name box, type a name for the file.Note: The definition file must have the extension .def.4. Click Save.

SQLTXT Designer

Page 99: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Steps Import Delimited Records with DelimitedColumns

1. Open the appropriate SQLTXT database.2. From the Edit menu, click Import Table Data.The Import SQLTXT Table Data File dialog box appears.3. Select the text file to import, and click Open.4. Click Delimited records.5. In the Record delimiter box, click the delimiterused to separate individual records in the file.6. In the Number of header rows box, enter thenumber of header rows in the file. The SQLTXTDesigner uses these header rows to name thecolumns.7. In the Decimal symbol box, type a singlecharacter that is used for the decimal point innumeric values.

SQLTXT Designer

Page 100: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

8. In the Character set box, enter the encodingused in the text file.9. In the Digit grouping symbol box, type thecharacter that is used for the thousandsseparator in numeric values. 10. In the Preview rows box, enter the number ofrows that you want to view in the wizard.11. Click Next.12. Select Delimited columns.13. In the Delimiter type box, click the delimiterused to separate the columns in the table.14. In the Quote character box, click the quotationcharacter used to enclose individual columnswithin a record.15. Click Next.

SQLTXT Designer

Page 101: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

DecisionStream automatically names andattempts to specify the data type of each column.You can override these selections.

16. To rename a column, click the column nameand type a new name.17. To change a data type, double-click theappropriate column, and in the Data type dialogbox, click a different data type. If you selectNUMBER, you must also specify the number ofdigits expected after the decimal point in theScale box. If you select DATE, you must alsospecify the format of the date in the Format box.18. Click OK to close the Data type dialog box.19. Click Process All Records to ensure that allrecord lengths and data types are correct.20. Click Finish. The wizard adds the table to thedatabase, and the SQLTXT Designer appears.

SQLTXT Designer

Page 102: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Steps to define a table manually in SQLTEXT Designer:

1. Click the Database icon. 2. From the Edit menu, click Insert Table. An empty

table appears in the tree.3. Click the new table and, from the Edit menu, click

Rename.4. Type the new name for the table.5. In the Header lines text box, type the number of

header rows present in the file.6. In the Trailer lines text box, type the number of

trailer lines in the file. SQLTXT ignores these rows when it accesses data

in the file.7. In the Character set box, enter the encoding used

in the text file. You can click an encoding type from the list, or type

the code page into the box.

SQLTXT Designer

Page 103: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

8. In the Action on row error box, click the action to apply when faulty data is read.

9. Select or clear the Remove trailing whitespace from fields check box as appropriate.

10. Specify whether columns in the input text file are of fixed length or delimited .

11. In the Record delimiter box, click the delimiter used to separate individual records.

12. If you selected Delimited records, in the Column delimiter box, specify the delimiter used to separate the columns in the table.

13. If you selected Delimited records, click the quotation character used to enclose individual columns within a record.

14. If you selected Delimited records, select the Ignore extra columns check box to ignore any excess fields.

SQLTXT Designer

Page 104: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Adding Columns to the table manually:

1. Click the table to which you want to add a column.

2. From the Edit menu, click Insert Column.A new column appears beneath the selected table.

3. In the Data type box, click the data type for the column, and specify appropriate length for that column.

4. If the column can accept null values, select the Nullable check box.

5. If the column forms part of the primary key of the table, select the Key check box.

SQLTXT Designer

Page 105: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Creating an SQL Query (SELECT Statement)

1. From the Tools menu, click SQLTerm.2. In the box at the top of the SQLTerm window,click the database with which you want to work.3. Use the Cognos SQL check box to specifywhether you want to use the native SQL orCognos SQL for the database you are accessingwhen you construct the SQL statement.Select or clear the check box as appropriate.

Tip: Using Cognos SQL makes it easier to port your project between database platforms.

Note: The default for the Cognos SQL check boxis determined by whether you selected theCognos SQL check box in the ConnectionProperties dialog box.

SQL Term

Page 106: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

4. In the Database Objects pane, expand the tree,and then click the table or column for whichyou want to add a SELECT statement.5. To generate the SQL statement use one of thefollowing methods:• Right-click, and then click either Add TableSelect Statement, or Add Column Select Statement.• Click the Source SQL tab. Hold down Ctrl anddrag the table or column you selected inthe Database Objects pane to the Source SQL tab.DecisionStream clears any existing query thatmay be on the Source SQL tab and generates theSQL SELECT statement for the selected table orcolumn.6. You are now ready to execute the SQLstatement.

SQL Term

Page 107: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Module 8

Command Line interface

Page 108: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Executing a Fact build from a DecisionStream Catalog

DATABUILD -c<catdb_driver> <catdb_items> <databuild_name>[<options>]

Where

<catdb_driver> The database driver that DecisionStream must use to connect to the

catalog. <catdb_items> The connection string that DecisionStream must pass to the

database driver to connect to the catalog. <databuild_name> The name of the build that

you want to execute. When you invoke DATABUILD with this syntax, it executes the named

build that resides in the named catalog.

Example

DATABUILD -cODBC "DSN=SalesCat;UID=Sales;PWD=ds123" US_Sales

This command invokes DATABUILD to execute the build named US_Sales. To retrieve the

Build definition, DATABUILD connects to the ODBC data source named 'SalesCat' as user

Sales', with password 'ds123'.

Command Line Interface

Page 109: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

To Execute a Dimension Build from a Catalog

DIMBUILD -c<catdb_driver> <catdb_items> <dimbuild> [<options>]Where<catdb_driver> The database driver that DecisionStream must use to connect to thecatalog.<catdb_items> The connection string that DecisionStream must pass to the databasedriver to connect to the catalog. For example, to connect as user 'DBA', with password

'PASS',to a catalog that resides in an ODBC data source named “Sample”, you would specify:"DSN=Sample;UID=DBA;PWD=PASS"<dimbuild> The name of the dimension build that you want to execute.Example

DIMBUILD -cODBC "DSN=SalesCat;UID=Sales;PWD=ds123" PeriodThe command above invokes DIMBUILD to execute the dimension build named Period. Toretrieve the dimension build definition, DIMBUILD connects to the ODBC data source

named'SalesCat' as user 'Sales', with password 'ds123'.

Command Line Interface

Page 110: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

RUNDSJOB

This command executes a JobStream from a DecisionStream catalog.

Syntax

RUNDSJOB <catdb_driver> <catdb_items> <jobstream> [<options>]<options> ::= [-e<runenv>] [-j<subjob>] [-A<dbalias_file>] [-C][-L<logfile>] [-P] [-O] [-R] {-V<name>[=<value>]}Where<catdb_driver> The database driver that DecisionStream must use toconnect to the catalog that contains the JobStream.<catdb_items> The connection string that DecisionStream must passto the database driver to connect to the catalog. For example, to connect as user 'DBA',

withPassword 'PASS', to a catalog that resides in an ODBC data source named “Sample”, youwould specify:"DSN=Sample;UID=DBA;PWD=PASS"<jobstream> The name of the JobStream that DecisionStreammust execute.-e Denotes the run environment for the JobStream.

Command Line Interface

Page 111: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

RUNDSJOB – Continue …<runenv> The run environment that DecisionStream must apply to identify the correctdatabase alias.-j Denotes the subjob of the JobStream that DecisionStream should execute.<subjob> JobStreams can nest jobs. This option enables you to execute a job that is

nestedwithin the JobStream.-A Denotes the text file that contains the database alias definitions that DecisionStreamshould use for the JobStream.<dbalias_file> The name and path of the text file that contains database aliasdefinitions that DecisionStream must use for the build.-C Executes the JobStream in check-only mode. That is, DecisionStream executes theJobStream but does not deliver any data.-L Causes DecisionStream to log JobStream progress to the specified file.<logfile> The name and path of a text file to which DecisionStream should log build progress.-P Causes DecisionStream to pause at the end of JobStream execution and to prompt for

akeystroke before terminating.

Command Line Interface

Page 112: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

RUNDSJOB – Continue …

-O Causes DecisionStream to execute any builds in the JobStream in object creation mode. That is, DecisionStream executes the builds and creates any required fact and dimension tables and metadata structures, but does not deliver data to them.

-R Causes DecisionStream to restart the JobStream at the point of a previous interruption the JobStream restarts at the earliest node that did not successfully complete.

-V Denotes that the parameter is a named variable and value pair.

<name> The name of a variable that DecisionStream must use during item substitution.

<value> The value that the corresponding named variable takes.

Example

RUNDSJOB ODBC "DSN=Sales;UID=admin" example_job -jbuild_fiscal -R

This example invokes RUNDSJOB to restart the subjob named 'build_fiscal' that is nested in

The job named 'example_job'. The DecisionStream catalog resides in the ODBC data sourceNamed 'Sales', to which DecisionStream connects as user 'admin' with no password.

Command Line Interface

Page 113: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

CATEXPThis command exports a catalog item to a DecisionStream file-based specification.SyntaxCATEXP <catdb_driver> <catdb_items> <export_file> <comp_type>

[<comp_name>] [-a] {-V<name>[=<value>]} <comp_type> ::= A|B|C|D|F|H|J|L|S|T

Where<catdb_driver> The database driver that DecisionStream must use to connect to thecatalog.<catdb_items> The connection string that DecisionStream must pass to the databasedriver to connect to the catalog. For example, to connect as user 'DBA', with password

'PASS',to a catalog that resides in an ODBC data source named 'Sample', you would specify:"DSN=Sample;UID=DBA;PWD=PASS“ <export_file> The path and name of the fileto which you want to export the catalog component. <comp_type> The type of component that you want to export.

Command Line Interface

Page 114: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

CATEXP – Continue …

-a Causes DecisionStream to append the exported component to the named file.

<name> The name of a variable.

<value> The value that the associated variable takes.

<comp_type> The type of component that you want to export. The comp_type

values have the following meanings:

Command Line Interface

Page 115: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

CATIMPThis command imports a text-based component definition into a DecisionStream

catalog.

Syntax

CATIMP <catdb_driver> <catdb_items> <import_filename> <filetype> [<comp_name> [<caption>[<notes>]]] [-d<dbalias>][-o][-I] {-V<name>[=<value>]} <filetype> ::= B|C|D|F|J|R|SWhere<catdb_driver> The database driver that DecisionStream mustuse to connect to the catalog.<catdb_items> The connection string that DecisionStream must pass to the databasedriver to connect to the catalog. For example, to connect as user 'DBA', with password

'PASS',to a catalog that resides in an ODBC data source named 'Sample', you would specify:"DSN=Sample;UID=DBA;PWD=PASS“ <import_filename> The path and name of the text file that defines the component.<filetype> The type of component that you want to export.

Command Line Interface

Page 116: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

CATIMP – Continue…

<comp_name> The name of the individual component that you want to import.

This is optional for reference structures, aliases, and functions, but mandatory

for other component types.

<caption> An optional caption, or business name, that DecisionStream should

use for the item for display or presentation purposes.

<notes> Optional notes that appear within DecisionStream Designer.

Command Line Interface

Page 117: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

CATIMP – Continue…

Example

CATIMP ODBC "DSN=SalesCat" SalesBld.bld B US_Sales "US Sales -o

This command invokes CATIMP to import the build US_Sales from the text file

Sales.bld, into the catalog that resides within the ODBC data source named

'SalesCat', overwriting any build with the same name.

Within the catalog, CATIMP gives the build US_Sales the caption 'US Sales'.

CATIMP connects to the named data source as the default user, with no password.

Command Line Interface

Page 118: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

CATIMP – Continue…

Order of Import

Because DecisionStream validates objects that reside in a catalog, you must import text

Definitions in dependency order. For example, do not import a build until the catalog contains

the collections and all the aliases and hierarchies that it uses. Normally, you should import

text definitions in this order:

1. Aliases

2. User-defined functions

3. Dimension table templates

4. Reference structures (hierarchies and lookups)

5. Collections

6. Builds and dimension builds

7. JobStreams

Command Line Interface

Page 119: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Definitions

• Build

This is a DecisionStream Unit of work that goes through the steps of Acquisition, Transformation, and Delivery. There are two types of build, fact builds and dimension builds.

• Collection

When DecisionStream is driven from a text file specification, the transformations are split into a build and a collection. The build deals with the delivery of data and the collection deals with the sources of data and the transformation process.

• Component

A fact build, dimension build, collection, hierarchy, lookup jobstream, user-defined function, template or connection in a catalog.

Page 120: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Module 9

Definations

Page 121: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Definitions

• Condition Node

A condition node provides a branching mechanism between nodes for conditional execution. Each condition node can have many nodes linking to it, but only two output links (True, and False).

• Connection

All the information required to make a connection to a database. The actual information required varies according to DBMS and connection method.

• Data Mart

A database that holds data for analysis. It usually implies that the data and its organization is of limited scope or is targeted at a particular group of users and business subjects, for example orders.

• Data Source

Somewhere from which the DecisionStream can acquire data.

Page 122: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Definitions

• DataStreamA DecisionStream object that gathers together all the data sources from which the build or reference structure acquired data. Data streams merge these sources to present a consider whole to other DecisionStream objects.

• DesignerDecisionStream Designer is the Windows software that you use to produce build specifications and Dimensional Frameworks.

• DimensionA Key Component of a business by which you want to analyze your data. For example, the products that your company sells and the retail outlets in which these products are sold.

• Dimension BuildA Decision Stream build process that delivers only dimension data.

Page 123: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

• Dimension TemplateA dimension template lists the columns that may exists in a table of dimension data, together with the behaviour of each column.

• Domain TypeIt is the domain that is used to deliver dimension data at the end of a build. The two types are Dynamic ( where the domain is build up from data sources as rows are processed) and Reference (where the reference object associated with the dimension is taken as the domain)

• FactbuildA DecisionStream build that delivers fact data. May optionally deliver dimension data, and metadata, allowing a private datamart to be built from within a single build.

• Foster ParentAn artificially introduced member that acts as a parent for members that either have no defined parent or whose defined parent cannot be found at the next hierarchy level.

Definitions

Page 124: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

• JobStreamA DecisionDtream object that combines other DecisionStream object to form a logical process.

• Job NodeA job node is actually a JobStream within a JobStream. This allows larger jobs to be broken down into a series of smaller jobs. When DecisionStream encounters a job node it processes all the steps within the sub job, and only when these steps are complete, does it move on to the next node in the sequence.

• Leaf NodeIn a hierarchy, a member that has no children.

• Lookup

A simple reference object that consists of members that are not arranged into hierarchical levels.

Definitions

Page 125: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

• MappingThe relationship between columns (from an SQL query) and the DecisionStream objects to which they relate. DecisionStream has mappings that relate data sources to transformation model elements and structure data columns to level attributes.

• Message FrequencyThe rate at which DecisionStream generates messages as it executes a build. Input message frequency refers to how many data rows DecisionStream acquires between messages. Output message frequency refers to how many data rows DecisionStream delivers between messages.

• MetadataData that describe the delivered data. Typically, metadata defines the data structure and the domain of each dimension. It can also provide aliases that reporting tools can use to provide meaningful descriptions.

Definitions

Page 126: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

• Never OutputAn indication on a transformation model element that DecisionStream must not make the element available for delivery.

• Object Creation ModeA build execution mode in which fact tables, dimension tables, and metadata are created but no fact or dimension data is delivered.

• Output FilterA filter that can be specified in a delivery module to restrict delivery of rows to the target system. The output filter takes any expression that evaluates to TRUE or FALSE.

• Output LevelA level of hierarchy at which DecisionStream will output data. Output data may be generated by aggregation.

Definitions

Page 127: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

• PivotTo move a dimension from on axis to another. For example, consider a relational table that has a single column (called product) that holds all product values. Assume that this has one column fro each business measure (units, revenue, etc.) The product column could be pivoted to produce one column for each product and the business measures pivoted to produce one row for each measure.

• Procedure NodeA procedure node can contain one or more DecisionStream functions or statements. This node can be used to coordinate processing around builds for such activities as checking for input files, sending mail messages and alerts, and generating custom logging and auditing messages.

• Ragged HierarchyA hierarchy that has leaf nodes at more than one level. Also called an unbalanced hierarchy.

Definitions

Page 128: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

• Reference ExplorerA DecisionStream object that gathers together all reference structures that relate to a particular business dimension.

• Reject FileA text file in which DecisionStream stores records that the engine rejects. In these files, each rejected record has the reason for rejection as its first field.

• Sample RateWhen reading from a data source, DecisionStream can apply a sample rate so that it does not process every row. For example, a sample rate of 10 results in DecisionStream processing every tenth row and ignoring the intermediate rows.

• Slowly Changing DimensionA business dimension in which one or more non-key values may change without a corresponding change in the key values.

Definitions

Page 129: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

• SQL NodeUse an SQL node to enter a single SQL statement that DecisionStream performs when the SQL node is reached in the JobStream flow. DecisionStream automatically commits the successful SQL statements, but roll back if the statement fails.

• SQLTermA terminal monitor application that provides a common interface to the various relational database products that DecisionStream supports.

• SQLTXT DesignerIt is a TOOL which enables text files to be described in a way that subsequently allows SQLTerm to access the data that the text files hold.

• TransformationThe re-expression of a stream of data in some different format. Typically the merging and aggregation of source data to provide delivery elements.

Definitions

Page 130: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

• Star SchemaA star schema represents the dimension in a single table. Each level of the delivered hierarchy is represented by one or more columns of this table. In order to use the Dimension Build wizard to create a dimension build that supports slowly changing dimensions, you must use this schema type.

• Surrogate KeySurrogate keys are numeric keys that can replace business keys in the context of a data mart. Whereas the natural ID may be text-based, the surrogate key is always an integer.

• Tree PaneThe left pane of the Designer window where DecisionStream arranges the objects of the catalog in a tree-like hierarchical fashion.

• Transformation ModelCollection of dimension, measure, attribute and derivation elements in a fact build.

Definitions

Page 131: Internal and Confidential COGNOS Decision Stream Cognos CoE.

April 19, 2023

Thank YouThank You


Recommended