What does the Process at End (Blocking) Group By Mode do?

What does the Process at End (Blocking) Group By Mode do?

• A. Streams after each group.
• B. Sorts data prior to grouping.
• C. Discards incomplete groups.
• D. Holds all features until the end.

Answer: (D)

Blocking processing in Group By means the transformer gathers all features into their respective groups and does not emit any results until the end of the input. That holding of features until the end is exactly what this mode implies: you accumulate everything first, then compute and output the per-group results. Because it waits for the end, it can only stream results after all data has been seen, and it requires keeping all features in memory. This isn't about sorting before grouping (that would be a separate step) and it doesn't mean discarding incomplete groups—the output is produced only after the final data is received.

Blocking processing in Group By means the transformer gathers all features into their respective groups and does not emit any results until the end of the input. That holding of features until the end is exactly what this mode implies: you accumulate everything first, then compute and output the per-group results. Because it waits for the end, it can only stream results after all data has been seen, and it requires keeping all features in memory. This isn't about sorting before grouping (that would be a separate step) and it doesn't mean discarding incomplete groups—the output is produced only after the final data is received.