Input Groups
A Union transformation has two input groups. Each group can have different field rules for each upstream transformation.
When you work with Union transformations, the input groups have the following characteristics:
- •The Union transformation initializes its output fields based on fields in the first source you connect to an input group.
- •Each input group can use a different field mapping mode or parameter.
- •You can parameterize the field mappings or define the field mapping for each input group.