Table of Contents

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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. Import From PowerCenter
  13. Performance Tuning
  14. Pushdown Optimization
  15. Partitioned Mappings
  16. Developer Tool Naming Conventions

Developer Mapping Guide

Developer Mapping Guide

Segments

Segments

A segment consists of one or more objects in a mapping, mapplet, rule, or virtual stored procedure. A segment can include a source, target, transformation, or mapplet.
You can copy segments across folders or projects. Consider the following rules and guidelines when copying segments:
  • The Developer tool reuses dependencies when possible. If it cannot reuse the dependencies, it copies dependencies.
  • If a mapping, mapplet, rule, or virtual stored procedure includes parameters and you copy a transformation that refers to the parameter, the transformation in the target object uses a default value for the parameter.
  • You cannot copy input transformations and output transformations.
  • After you paste a segment, you cannot undo previous actions.
You can also generate a mapplet from a segment in a mapping or mapplet. You might want to generate a mapplet when a mapping or mapplet contains a connected transformation flow that you want to reuse. For more information about generating mapplets, see Generating a Mapplet.

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