17.10 - Argument Type and Rules - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Operators and User-Defined Functions

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Administration
Programming Reference
Publication ID
B035-1210-171K
Language
English (United States)

Expressions passed to this function must have a data type of VARCHAR(n) CHARACTER SET LATIN, where the maximum supported size (n) is 64000. You can also pass arguments with data types that can be converted to VARCHAR(64000) CHARACTER SET LATIN using the implicit data type conversion rules that apply to UDFs. For example, CAMSET_L(CHAR) is allowed because it can be implicitly converted to CAMSET_L(VARCHAR).

The UDF implicit type conversion rules are more restrictive than the implicit type conversion rules normally used by Vantage. If an argument cannot be converted to VARCHAR following the UDF implicit conversion rules, it must be explicitly cast.

The input to this function must be Latin character data.

If you specify NULL as input, the function returns NULL.