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English
  • Common Content for Data Engineering 10.2.1
  • All Products

Table of Contents

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

Developer Mapping Guide

Developer Mapping Guide

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Define Targets Based on the Mapping Flow

Define Targets Based on the Mapping Flow

When you define columns by mapping flow, target columns are determined by upstream transformations. When an upstream transformation changes the port order and metadata, the Write transformation picks up the changes.
You can retain keys when you create or replace the target if the key columns in the upstream transformation match the key column names in the target.
The following image shows how the Write transformation appears when you define target columns based on mapping flow:
When you configure dynamic ports in a Write transformation, the Developer tool groups them into a single All Ports node.
To avoid unexpected results, do not configure a run-time link to a Write transformation that defines targets based on the mapping flow.
Configure this functionality on the
Ports
 tab of the Write transformation for flat file and relational targets.
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