Runtime column propagation

You can define part of your schema and specify that extra columns be adopted and propagated through the rest of the job.

InfoSphere® DataStage® is also flexible about metadata. It can cope with the situation where meta data isn't fully defined. You can define part of your schema and specify that, if your job encounters extra columns that are not defined in the meta data when it actually runs, it will adopt these extra columns and propagate them through the rest of the job. This is known as runtime column propagation (RCP). This can be enabled for a project via the Administrator client, and set for individual links via the Output Page Columns tab for most stages, or in the Output page General tab for Transformer stages. You should always ensure that runtime column propagation is turned on if you want to use schema files to define column metadata.