External Routines - Analytics Database - Teradata Vantage

SQL Data Definition Language Detailed Topics

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
dita:mapPath
vuk1628111288877.ditamap
dita:ditavalPath
qkf1628213546010.ditaval
dita:id
B035-1184
lifecycle
latest
Product Category
Teradata Vantage™
ANSI SQL defines the following family of SQL-invoked routines:
  • Procedures.
  • User-defined functions.
  • User-defined methods.

The ANSI SQL:2008 standard categorizes these SQL-invoked routines as either external routines or SQL routines.

An external routine is a user-defined function (UDF), method (UDM), or procedure that is written in an external, that is, non-SQL language such as C or C++, while SQL routines are written entirely in the SQL language.

When an external routine associated with a UDT is invoked, the system passes a handle to the UDT argument instead of passing the UDT value. Given the handle, the external routine can either retrieve or set the value of a UDT argument by means of a set of library functions provided by Teradata for this purpose. For more information, see Teradata Vantage™ - SQL External Routine Programming, B035-1147.