Passing data through from the input link to the output link in DataStage

Passing data through from the input link to the output link in DataStage®

The output link supports a pass-through mechanism by which data is copied without modification from the input link to the output link. This mechanism works with columns that are not involved in the web service operation. It requires an exact match between column names that are specified in both the output link and the input link.

For example, you can copy comments from an input table column to an output table. If the Comments column is not part of the web service request but is included in the input and output links, the Comments value is automatically copied. You can disable the pass-through mechanism.

Note: When a string column is a pass-through column, the corresponding output link column must also be defined as a string column, and cannot be defined as a ustring column.

The Web Service stage has a propagate column to automatically copy input link column data to output link column data.

For information about disabling the pass-through mechanism, see Setting up Output Link Properties.