Mappings

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Detailed data preview in mapplets

When you preview data in a mapping that contains a Mapplet transformation, you can drill down on the Mapplet transformation and preview data for transformations in the mapplet. If the mapplet contains another Mapplet transformation, you can continue to drill down to subsequent mapplets.

When you preview transformations in a mapplet,

Data Integration

runs data preview in the context of the mapping that you drilled down from.

Data Integration

creates a temporary preview job that uses the mapping source data and a virtual target created directly downstream from the transformation that you want to preview in the mapplet. After the job runs,

Data Integration

displays data that is transformed by the selected transformation.

To preview data in a mapplet, you must drill down to the mapplet from a mapping even if the mapplet contains a Source transformation. You cannot run data preview in a mapplet that you open in the Mapplet Designer.

The following image shows the

Preview

panel after running data preview in a mapplet:

You run a preview job in a mapplet the same way that you run a preview job in a mapping. The

Data Preview

wizard displays the preview context of the mapplet as a breadcrumb and the mapping that the mapplet is referenced in. If the mapping or mapplet contains input parameters,

Data Integration

prompts you to enter parameter values when you run the preview.

You can preview data for any transformation except for the following transformations:

Data Masking

Hierarchy Builder

Input

Output

Sequence Generator

Velocity

Web Services

Target

You can only preview mapplet data if the mapplet was created in