Identity Columns and Bulk Inserts - 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™

Identity column values for rows bulk-inserted into a table defined with a GENERATED ALWAYS identity column are replaced automatically with system-generated numbers. A warning of this replacement is issued only once for all rows inserted using an INSERT ... SELECT statement. Other bulk-inserting utilities such as Teradata Parallel Data Pump and BTEQ imports receive the same warning for each row inserted.

Rows bulk-inserted into tables with either of the following identity column definitions are not guaranteed to be unique unless the appropriate row columns are constrained by a UPI, USI, PRIMARY KEY, or UNIQUE constraint.
  • GENERATED BY DEFAULT
  • GENERATED ALWAYS with CYCLE