Usage Notes - Analytics Database - Teradata Vantage

SQL Functions, Expressions, and Predicates

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
2024-01-12
dita:mapPath
obm1628111499646.ditamap
dita:ditavalPath
qkf1628213546010.ditaval
dita:id
kby1472250656485
lifecycle
latest
Product Category
Teradata Vantageā„¢

The scalar_expression_1 argument may be evaluated twice: once as part of the search condition (see the preceding expanded CASE expression) and again as a return value for the ELSE clause.

Using a nondeterministic function, such as RANDOM, may have unexpected results if the first calculation of scalar_expression_1 is not equal to scalar_expression_2, in which case the result of the CASE expression is the value of the second calculation of scalar_expression_1, which may be equal to scalar_expression_2.

You can use a scalar subquery in a NULLIF expression. However, if you use a non-scalar subquery (a subquery that returns more than one row), a runtime error is returned.