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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

Define a Target Schema Strategy

Define a Target Schema Strategy

You can define a target schema strategy for the target table in the Write transformation.
You can select from the following target schema strategy options:
RETAIN - Retain existing target schema
The Data Integration Service retains the existing target schema.
CREATE - Create or replace table at run time
The Data Integration Service drops any existing target table associated with the write object and creates a table based on the data object or the mapping flow.
When the Data Integration Service creates a table based on the data object, the table contains columns that match the ports in the data object. If you create or replace the target at run time with a customized data object, the Data Integration Service creates a table with the name referenced in the data object connection.
When the Data Integration Service creates a table based on the mapping flow, the table contains columns that match generated ports in the Write transformation.
Assign Parameter
You can assign a parameter to represent the value for the target schema strategy and then change the parameter at run time.
Configure this functionality on the
Advanced
tab of the data object.

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