Router Transformation[1]

8/2/2019 Router Transformation[1]

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ROUTER

TRANSFORMATION

Basics and Advanced Concepts


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TRANSFORMATIONS

Transformations help to transform the source data according to the

requirements of target system and it ensures the quality of the data

being loaded into target.

Transformations are of two types:

1) Active

2) Passive


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Router Transformation is a Connected, Active

transformation


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Router transformation and Filter

A Router transformation is similar to a Filter transformation

because both transformations allow you to use a condition to test

data

Router transformation tests data for one or more conditions and

gives you the option to route rows of data that do not meet any of

the conditions to a default output group.


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Working with Groups

A Router transformation has the following types of groups: Input

Output

Input Group

The Designer copies property information from the input ports of the input group to

create a set of output ports for each output group.

Output Groups

There are two types of output groups:

User defined

Default


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User-Defined Groups

create a user-defined group to test a condition based on incoming

data

consists of output ports and a group filter condition

Create one user-defined group for each condition that you want to

specify

The PowerCenter Server uses the condition to evaluate each row

of incoming data


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The Default Group

The Designer creates the default group after you create one new

user-defined group

Does not have a group filter condition associated with it

all of the conditions evaluate to FALSE, the PowerCenter Server

passes the row to the default group


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If you want the PowerCenter Server to drop all rows in the default

group, do not connect it to a transformation or a target in a

mapping

The Designer deletes the default group when you delete the last

user-defined group from the list


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Using Group Filter Conditions

We can test data based on one or more group filter conditions

Create group filter conditions on the Groups tab using the

Expression Editor

Enter any expression that returns a single value

We can also specify a constant for the condition


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A group filter condition returns TRUE or FALSE for each row

that passes through the transformation, depending on whether a

row satisfies the specified condition

Server passes the rows of data that evaluate to TRUE to each

transformation or target that is associated with each user-defined

group


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Using a Router Transformation in a Mapping


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Specifying Group Filter Conditions


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Adding Groups

Click the Groups tab.

Click the Add button.

Enter a name for the new group in the Group Name section.

Click the Group Filter Condition field and open the Expression Editor.

Enter the group filter condition.

Click Validate to check the syntax of the condition.

Click OK


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Working with Ports


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Input Port Name and Corresponding Output Port Names


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Creating a Router Transformation

Select Router transformation, and enter the name of the new

transformation. The naming convention for the Router transformation isRTR_TransformationName. Click Create, and then click Done

Select and drag all the desired ports from a transformation to add them tothe Router transformation, or you can manually create input ports on the

Ports tab

Click the Groups tab, and then click the Add button to create a user-defined group.

The Designer creates the default group when you create the first user-defined group


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Click the Group Filter Condition field to open the Expression Editor.

Enter a group filter condition

Click Validate to check the syntax of the conditions you entered and clickOK

Connect group output ports to transformations or targets

Choose Repository-Save


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ThankYou !!!

Router Transformation[1]

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