16.10 - AccessLockForUncomRead - Teradata Database

Teradata Database Utilities

Product
Teradata Database
Release Number
16.10
Published
June 2017
Language
English (United States)
Last Update
2018-04-26
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Purpose

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 Topics

For more information on… See…
Locks and concurrency control SQL Request and Transaction Processing.
Session isolation level SQL Request and Transaction Processing.