Synchronizing Columns With Your Data Source - IBM Cognos User Manual

2. In the Data source name box, type the name of the data source and, in the
3. Click Next to specify information about the data source.
4. Click Browse to open the data source browser and select a data source from the
5. Click Next.
6. Specify whether or not to Run Autodesign, and click Finish.
7. Confirm that your selected items appear as expected in the Data Sources list.

Synchronizing Columns with Your Data Source

As the modeler, you must ensure that the columns in your model reflect the
current state of your data sources. There is limited error-handling. For example, an
error message is issued if you try to add a query item that is already referenced in
your model.
You can quickly resynchronize your model columns after a data update. You can
add data source items to the model or remove columns from the model. You can
also resolve mismatches between data source items and columns in the model. For
example, if you rename data source items, Cognos Transformer may no longer be
able to match those items with their corresponding columns in the model.
You can choose to resolve mismatches manually or let Cognos Transformer attempt
to automatically resolve mismatches. For IBM Cognos data sources, Cognos
Transformer presents options for matches for your review. If Cognos Transformer
determines that mismatches are caused by a structural change in the data source,
Cognos Transformer provides a list of locations in the data source that may be
possible matches for mismatched columns. If none of the locations provided are
appropriate, or if Cognos Transformer is unable to suggest any locations in the
data source, Cognos Transformer provides a list of items in the model that are
similar to the source reference of the column. For each possible match, Cognos
Transformer shows how closely the references match by using a percentage. If
none of the items are appropriate, you can leave columns unmatched.
You can quickly resynchronize your model columns after a data update if your
model uses a single query based on a text data file, an IQD, or an IBM Cognos
package or report. Resynchronize your model by invoking the Modify Columns
command from the Tools menu.
Use the following procedure to synchronize columns with IBM Cognos data
sources.
Procedure
1. In the Data Sources list, select the query whose columns you want to modify,
Tip: If the Insert Data Source option is unavailable, you may have right-clicked
a package or report data source.
Data source type box, select one of the available options.
The parameters depend on the data source type that you selected on the
previous page.
If you selected an IQD data source generated from Impromptu , set the
Isolation level.
available list.
Tip: To view sample data or the SQL from your data source, from the View
menu, click Data Source Viewer.
and from the Tools menu, click Modify Columns.
Chapter 3. Data Sources for Your Model
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