17.05 - Purpose of the Atomic Upsert Operation - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Manipulation Language

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Release Date
January 2021
Content Type
Programming Reference
Publication ID
B035-1146-175K
Language
English (United States)

The single-pass upsert is described as atomic to emphasize that its component UPDATE and INSERT SQL statements are grouped together and performed as a single, or atomic, SQL request.

Existing Teradata Parallel Data Pump scripts that use the upsert feature in its Teradata Parallel Data Pump-specific form, using paired UPDATE and INSERT requests, do not have to be changed to take advantage of the atomic upsert capability because Teradata Parallel Data Pump automatically converts an UPDATE … INSERT request pair in its older syntax into a corresponding atomic upsert request whenever appropriate.

The atomic upsert syntax can also be used by any CLIv2-based applications and is particularly useful when coded directly into BTEQ scripts.