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

Teradata Vantageā„¢ - SQL Functions, Expressions, and Predicates

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1145-171K
Language
English (United States)
Expressions passed to this function must have one of the following data types:
  • CHAR
  • VARCHAR
  • CLOB

If Vantage passes constants as the second and third parameter in an OREPLACE call, the character type of the first argument is passed as Unicode, and calls oreplace_unicode() with the return type VARCHAR in Unicode charset.

You can also pass arguments with data types that can be converted to the above types using the implicit data type conversion rules that apply to UDFs.

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 the required data type following the UDF implicit conversion rules, it must be explicitly cast.