Callback programming model
Aggregate AEs always use a callback model. Function AEs that return exactly one output row per input row can optionally use a callback model instead of the File I/O model.
This information applies to Netezza Performance Server for Cloud Pak for Data System 2.0.X.
See also Netezza Performance Server for Cloud Pak for Data System 1.0.X, Netezza Performance Server for Cloud Pak for Data, and Netezza Performance Server for Cloud Pak for Data as a Service.
Aggregate AEs always use a callback model. Function AEs that return exactly one output row per input row can optionally use a callback model instead of the File I/O model.