To perform impact analysis
on a metadata object, right-click the object in a tree view or in
a process flow in the
Job Editor window,
and then select
Analyze from the pop-up menu.
Be sure to save the job in the
Job Editor window
before running analysis on a metadata object in that job. Otherwise,
your analysis does not reflect any changes since the last save.
Alternatively, you can
select the object in a tree view or in the context of a process flow,
select
Actions from the menu bar, and then
select
Analyze. The following display shows
the tree view of the analysis of a table named CUSTOMER.
Perform the following
steps to trace the impact of the metadata for a table column:
-
In a tree view or in
the context of a process flow, right-click on the metadata object
for the table that contains the column to be analyzed. Select
Analyze.
-
In the
Analyze window,
right-click on the metadata object for the table, and then select
Analyze
Columns.
-
Select the column that
you want from the
Available columns pane.
Use the arrow key to move it to the
Selected column pane.
Select a Column to Analyze Window
-
Click the
OK button.
A new window appears. In the following display, this window shows
the result of an analysis performed on a column named Customer_ID
in a table named CUSTOMER.
The
Tree
View window uses a hierarchical list to illustrate the
impact of the selected object (Customer_ID column) on later objects
in a process flow. In the previous display, the tab contains three
jobs. In this example, the third job contains the following objects:
-
CUSTOMER.Customer_ID
(Foundation): specifies the selected column, Customer_ID,
in the table CUSTOMER, which is registered in the Foundation repository.
-
Load Dimension Table
(Foundation): specifies the job, Load Dimension Table,
to which the Customer_ID column is an input. The mapping type
is 1:1.
-
SCD Type 2 Loader.Customer_ID
(1:1) (Foundation): specifies the transformation that
maps data from the Customer_ID column to a column later in the
process flow. The mapping type is 1:1.
-
CUSTOMER_DIM.Customer_ID
(Foundation): specifies the target column, Customer_ID,
in the table CUSTOMER_DIM. The target column is loaded with data from
the selected column.
-
To view the results
as a graphical display, click on the icon for the Diagram View. The
same analytical results as shown in the preceding hierarchical display
are shown in the following graphical example.
The Diagram View uses
a process flow to illustrate the impact of the selected object (Customer_ID
column) on later objects in the flow.