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DATASTAGE TRANSFORMER USAGE GUIDELINES - Wings Of Technology
Choosing Proper Stages The parallel Transformer stage always generates “C” language code which will compile to a parallel component. Because of this, it is mandatory to minimize the number of transformers in a single job and to use other stages (Filter, Copy, Modify, Switch.., etc.) when derivations are not needed. The Copy stage should be used instead of a Transformer for simple operations including: Job Design placeholder between stages (unless the Force option =true, DataStage engine will optimize this out at runtime) Renaming Columns Dropping Columns Default Type Conversions Note that rename, drop (if runtime column propagation (RCP) is disabled),