17.10 - Intermediate Aggregate Storage - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - SQL External Routine Programming

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1147-171K
Language
English (United States)

All aggregate and window aggregate UDFs require intermediate storage to combine data passed in during the various aggregation phases.

This topic describes how an aggregate UDF handles intermediate storage during each aggregation phase. To help illustrate what is required, the discussion uses code excerpts from a simple aggregate UDF that calculates the standard deviation. For the complete code example, see C Aggregate Function.