SET SESSION TRANSACTION ISOLATION LEVEL | VantageCloud Lake - SET SESSION TRANSACTION ISOLATION LEVEL - Teradata VantageCloud Lake

Lake - Working with SQL
Deployment
VantageCloud
Edition
Lake
Product
Teradata VantageCloud Lake
Release Number
Published
February 2025
ft:locale
en-US
ft:lastEdition
2025-11-21
dita:mapPath
jbe1714339405530.ditamap
dita:ditavalPath
pny1626732985837.ditaval
dita:id
jbe1714339405530

Changes the default transaction isolation level read-only semantics for the current session.

Also see the description of transaction isolation levels in Database Locks, Two-Phase Locking, and Serializability for further information about transaction isolation.

ANSI Compliance

SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL is ANSI SQL:2011-compliant with extensions.

ANSI SQL does not support the abbreviations RU and SR. They are Teradata extensions.

Other SQL dialects support similar non-ANSI standard statements with names such as the following:
  • SET CURRENT ISOLATION
  • SET ISOLATION
  • SET TRANSACTION
  • SET SESSION CHARACTERISTICS

Although SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL is technically a DCL statement, Vantage treats it as a DDL statement for transaction semantics.

Required Privileges

None.