Planning to Use a Union Transformation
When you design a mapping that includes a Union transformation,
When you use a Union transformation in a mapping, consider these guidelines:
- •Before you add the Union transformation to a mapping, add Source transformations and include other upstream transformations you want to use.
- •You cannot use an Update Strategy transformation upstream from a Union transformation.
- •You can use a Sequence Generator transformation upstream from a Union transformation if you connect both the Sequence Generator and a Source transformation to one input group of the Union transformation.