Work with Transaction Rollbacks | Teradata Vantage - 17.00 - 17.05 - Working with Transaction Rollbacks - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - Database Administration

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
17.05
Published
June 2020
Language
English (United States)
Last Update
2021-01-22
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A rollback is a reversal of an incomplete database transaction due to problems. A transaction may fail to complete and be aborted due to:

  • A deadlocked query
  • A database restart
  • An ABORT SESSION command

The rollback removes any partially completed database updates from the affected user tables. The system uses the TJ (dbc.transientjournal), which contains data about incomplete transactions, including a “before image” of each modified table row, to maintain data integrity.

Also see the rollback topics in Archiving, Restoring, and Recovering Data: Operational DBAs.