16.20 - String Constants - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL External Routine Programming

Product
Advanced SQL Engine
Teradata Database
Release Number
16.20
Release Date
April 2020
Content Type
Programming Reference
Publication ID
B035-1147-162K
Language
English (United States)

Teradata Database converts string constants as follows.

IF a UDF is passed this constant value … THEN Teradata uses this data type to determine the precedence order …
String in apostrophes VARCHAR
Graphic string in apostrophes VARCHAR CHARACTER SET GRAPHIC

Teradata Database does not implicitly convert character string constants that represent numeric values to numeric types unless they are part of an expression. For example, the string constant '1024' remains a character string. However, in an expression such as '1024' - 1, Teradata does convert the character string to a REAL, according to Teradata implicit conversion rules.

For more information on implicit type conversion rules, see Teradata Vantage™ - Data Types and Literals, B035-1143.