Systems, methods and articles of manufacture are disclosed for generating an incremental ETL job from an instance of an abstract ETL operator model representing an exhaustive ETL job for loading data from a source schema to a target schema. In one embodiment, the abstract operator model may be extended to include incremental variants of operators of the abstract ETL operator model. From the instance of the abstract ETL operator model and from the extended ETL operator model, a corresponding instance of the extended ETL operator model may be generated. An incremental ETL job may be deployed from the instance of the extended ETL operator model. The incremental ETL job may be executed to load data from the source schema to the target schema.