16.20 - external_data_access - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Syntax and Examples
Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
March 2019
Language
English (United States)
Last Update
2019-05-24
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Optional clause that determines whether the function (or external stored procedure) can read or modify data that is external to Teradata Database.

MODIFIES EXTERNAL DATA
The function modifies data that is external to Teradata Database.
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 Teradata Database. This is the default.
READS EXTERNAL DATA
The function reads, but does not modify data that is external to Teradata Database.