17.10 - AccessLockForUncomRead - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - Database Utilities

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Configuration
Publication ID
B035-1102-171K
Language
English (United States)

Determines whether SELECT requests embedded in INSERT … SELECT, UPDATE ... SELECT, and DELETE ... SELECT requests place READ or ACCESS locks on the source table.

Field Group

General

Valid Settings

Setting Default Locking for Outer SELECT and Ordinary SELECT Subqueries Default Locking for SELECT Embedded In DELETE, INSERT, MERGE, or UPDATE Request
TRUE READ ACCESS
FALSE READ READ

Default

FALSE

Changes Take Effect

After the DBS Control Record has been written.

Related Information

For more information on… See…
Locks and concurrency control Teradata Vantage™ - SQL Request and Transaction Processing, B035-1142.
Session isolation level Teradata Vantage™ - SQL Request and Transaction Processing, B035-1142.