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  1. Preface
  2. Mappings
  3. Mapplets
  4. Mapping Parameters
  5. Where to Assign Parameters
  6. Mapping Outputs
  7. Generate a Mapping from an SQL Query
  8. Dynamic Mappings
  9. How to Develop and Run a Dynamic Mapping
  10. Dynamic Mapping Use Cases
  11. Mapping Administration
  12. Export to PowerCenter
  13. Import From PowerCenter
  14. Performance Tuning
  15. Pushdown Optimization
  16. Partitioned Mappings
  17. Developer Tool Naming Conventions

Developer Mapping Guide

Developer Mapping Guide

User-Defined Mapping Outputs

User-Defined Mapping Outputs

A user-defined mapping output is a numeric value or a date that a mapping returns by aggregating a field or expression from each row in the mapping. Define the expression to aggregate and the data type of the result value.
Define the mapping output in the
Outputs
tab of the Properties view. Configure a name for the mapping output, a data type for the result, and indicate what type of aggregation to perform to return a result.
After you define the mapping output name and the output type, configure an Expression transformation in the mapping. In the Expression transformation, define the output expression that you want to aggregate. The expression can contain a port name or it can contain an expression with ports, functions, and parameters.

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