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English
  • Common Content for Data Engineering 10.5
  • All Products

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. 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

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Configuring a Dynamic Source

Configuring a Dynamic Source

You can configure the Read and Lookup transformations in a mapping to dynamically update metadata, including column names, when transformation sources change.
When you configure Read and Lookup transformations for a dynamic mapping, you can use one or more of the following methods:
Use a parameter as a source
When you use a parameter value as a source for a Read or Lookup transformation, you choose a parameter name that references a source data object that you defined elsewhere in the repository.
Configure Read and Lookup transformations to get metadata at run time
When you configure Read or Lookup transformations to get data object columns from a source at run time, the mapping refreshes the port definitions when the mapping runs.
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