Initializing Intermediate Aggregate Storage | Teradata Vantage - Initializing Storage - Analytics Database - Teradata Vantage

SQL External Routine Programming

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2023-07-11
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dita:id
B035-1147
lifecycle
latest
Product Category
Teradata Vantageā„¢

During the AGR_INIT aggregation phase, a UDF must initialize the intermediate storage pointed at by the returned pointer from the FNC_DefMem call.

For example, the following statements initialize the intermediate storage area in the standard deviation example:

s1->n     = 0;
s1->x_sq  = 0;
s1->x_sum = 0;