DEFAULT Function and the HAVING Clause - Analytics Database - Teradata Vantage

SQL Data Manipulation Language

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
2024-04-05
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lifecycle
latest
Product Category
Teradata Vantage™
The following rules apply to the use of the DEFAULT function as part of the search condition within a HAVING clause:
  • You can specify a DEFAULT function with a column name argument within a predicate. The system evaluates the DEFAULT function to the default value of the column specified as its argument. Once the system has evaluated the DEFAULT function, it treats it like a constant in the predicate.
  • You can specify a DEFAULT function without a column name argument within a predicate only if there is one column specification and one DEFAULT function as the terms on each side of the comparison operator within the expression.
  • Following existing comparison rules, a condition with a DEFAULT function used with comparison operators other than IS NULL or IS NOT NULL is unknown if the DEFAULT function evaluates to null.
A condition other than IS NULL or IS NOT NULL with a DEFAULT function compared with a null evaluates to unknown.
DEFAULT Function Used with this Condition Comparison Result
IS NULL
  • TRUE if the default is null
  • Else it is FALSE
IS NOT NULL
  • FALSE if the default is null
  • Else it is TRUE

For more information about the DEFAULT function, see Teradata Vantage™ - SQL Functions, Expressions, and Predicates, B035-1145.