When a single input group Custom transformation is downstream from a multiple input group Custom transformation that does not have a partition point, the Workflow Manager places a pass-through partition point at the closest upstream multiple input group transformation.
For example, consider the following mapping:
Partition point.
Multiple input groups.
Single input group.
Requires one thread for each partition.
Does not require one thread for each partition.
CT_quartile contains one input group and is downstream from a multiple input group transformation, CT_sort. CT_quartile requires one thread for each partition, but the upstream Custom transformation CT_sort does not. The Workflow Manager creates a partition point at the closest upstream multiple input group transformation, CT_Sort.
