17.05 - external_data_access - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Published
January 2021
Language
English (United States)
Last Update
2021-01-22
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An optional clause that determines whether the function or external stored procedure can read or modify data that is external to Vantage.

MODIFIES EXTERNAL DATA
The function modifies data that is external to Vantage.
In the event of a database error, the system does not redrive requests involving a function or external stored procedure defined with this option. For details about Redrive functionality, see Teradata Vantage™ - Database Administration, B035-1093.
NO EXTERNAL DATA
The function does not access data that is external to Vantage. This is the default.
READS EXTERNAL DATA
The function reads, but does not modify data that is external to Vantage.