Protected Mode Execution Option for C/C++ UDFs | Teradata Vantage - Protected Mode Execution Option for C/C++ UDFs - 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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B035-1147
lifecycle
latest
Product Category
Teradata Vantage™

The ALTER FUNCTION statement provides an option that controls whether Vantage invokes the function directly or runs the function indirectly as a separate process.

The option applies to functions that were created without specifying the EXTERNAL SECURITY clause in the CREATE FUNCTION or REPLACE FUNCTION statement. Functions that specify the EXTERNAL SECURITY clause are executed using separate secure server processes.

IF ALTER FUNCTION specifies … THEN Vantage
EXECUTE PROTECTED runs the function indirectly as a separate process.

If the function fails during execution, the transaction fails.

EXECUTE NOT PROTECTED invokes the function directly.

If you subsequently use REPLACE FUNCTION to replace the function, the execution mode reverts back to protected mode.

If the ALTER FUNCTION statement specifies EXECUTE NOT PROTECTED, and the function fails during execution, the database software will probably restart.

Only an administrator, or someone with sufficient privileges, can use the ALTER FUNCTION statement.