Sequence of three transformations (T1, T2, and T3), implemented by table functions. Each transformation is performed by a single table function. Output from all but the final one is materialized and staged before being passed to the next transformation.

• OLTP database structure points to T1

• T1 points to Stage 1

• Stage 1 points to T2

• T2 points to Stage 2

• Stage 2 points to T3

• T3 points to DSS database structure