Transaction Processing in ANSI Session Mode | SQL Fundamentals | Vantage - 17.10 - Transaction Processing in ANSI Session Mode - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Fundamentals

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1141-171K
Language
English (United States)

In ANSI mode, transactions are always implicitly started and explicitly closed.

A transaction initiates when one of the following happens:
  • The first SQL statement in a session executes.
  • The first statement following the close of a transaction executes.

The COMMIT or ROLLBACK/ABORT statements close a transaction.

If a transaction includes a DDL statement, it must be the last statement in the transaction. DATABASE and SET SESSION are DDL statements.

If a session terminates with an open transaction, any effects of that transaction are rolled back.

Two-Phase Commit

Sessions in ANSI session mode do not support Two-Phase Commit (2PC). If an attempt is made to use the 2PC protocol in ANSI session mode, the Logon process aborts and an error returns to the requestor.