AccessLockForUncomRead - Advanced SQL Engine - Teradata Database

Database Utilities

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
Published
June 2020
Language
English (United States)
Last Update
2020-06-15
dita:mapPath
boh1556732696163.ditamap
dita:ditavalPath
lze1555437562152.ditaval
dita:id
B035-1102
lifecycle
previous
Product Category
Teradata Vantage™

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 Teradata Vantage™ - SQL Request and Transaction Processing, B035-1142.
Session isolation level Teradata Vantage™ - SQL Request and Transaction Processing, B035-1142.