Example: Non-Valid WHEN Clause - Advanced SQL Engine - Teradata Database

SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
Published
September 2020
Language
English (United States)
Last Update
2021-01-23
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B035-1144
lifecycle
previous
Product Category
Teradata Vantage™

The following CREATE TRIGGER request fails because the WHEN condition contains an aggregate function, but is not specified in a subquery:

     CREATE TRIGGER trigwhen2
       AFTER INSERT ON t1
       REFERENCING NEW_TABLE AS NewTab
     FOR EACH STATEMENT
       WHEN (10 < MAX(NewTab.a))
     ABORT;
     *** Failure 5430 The Trigger WHEN clause cannot contain an aggregate or table reference.