17.05 - SELECT AND CONSUME Subqueries in INSERT Requests - 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)

An INSERT operation can use a SELECT AND CONSUME subquery to insert data from the row with the lowest value in the QITS column in the specified queue table and delete the row from the queue table.

The target table for the INSERT operation can be a base table or a queue table. If the target is a queue table, it can be the same queue table in the SELECT AND CONSUME subquery.

The SELECT AND CONSUME part of the request behaves like a regular SELECT AND CONSUME request. See SELECT AND CONSUME.

When the target table is a queue table, the INSERT part of the request behaves like an INSERT into a queue table. See Inserting Rows into Queue Tables.

Certain restrictions apply to triggers. An INSERT operation that uses a SELECT AND CONSUME subquery cannot be used as either of the following:
  • Triggering event statement that fires a trigger.
  • Triggered action statement fired by a triggering event.