Transient Journaling - Analytics Database - Teradata Vantage

SQL Data Definition Language Detailed Topics

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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B035-1184
lifecycle
latest
Product Category
Teradata Vantage™

The transient journal is a system-maintained dictionary table that provides a way to protect transactions from various system failures and from deadlock (see Teradata Vantage™ - SQL Request and Transaction Processing, B035-1142 for a description of deadlock). Each transaction processed by Vantage records a before change image of rows that are touched by the transaction. Then if a transaction fails for some reason, the before change image of any modified rows can be retrieved from the transient journal and written over the modifications, returning the row to the same state it was in before the transaction occurred. Vantage removes all before change images from the transient journal after a transaction commits.