Use a dynamic mapping to accommodate changes to the source at run time. You can use a dynamic mapping to manage frequent schema or metadata changes or to reuse the mapping logic for data sources with different schemas. Configure rules, parameters, and general transformation properties to create the dynamic mapping.

If the data for a source changes, you can configure a mapping to dynamically get metadata changes at runtime. If a source changes, you can configure the read operation to accommodate changes.

In the

Data Object

tab of the data object read operation, select the

At runtime, get data object columns from data source

option when you create a mapping and then run the mapping. The source schemas are refreshed at runtime.

You do not need to manually synchronize the data object and update each transformation before you run the mapping again. The Data Integration Service dynamically determines transformation ports, transformation logic in the ports, and the port links within the mapping.

For information about dynamic mappings, see the

Informatica Developer Mapping Guide

.