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

Teradata Vantage™ - SQL Functions, Expressions, and Predicates

Advanced SQL Engine
Teradata Database
Release Number
Release Date
July 2021
Content Type
Programming Reference
Publication ID
English (United States)

INDEX operates on the following types of arguments:

  • Character
  • Byte

    If one string expression is of type BYTE, then both string expressions must be of type BYTE.

  • Numeric

    If any string expression is numeric, then it is converted implicitly to CHARACTER type.

  • UDTs that have implicit casts that cast between the UDT and any of the following predefined types:
    • Numeric
    • Character
    • DATE
    • Byte

      To define an implicit cast for a UDT, use CREATE CAST and specify AS ASSIGNMENT. For details on CREATE CAST, see Teradata Vantage™ - SQL Data Definition Language Syntax and Examples, B035-1144.

      Implicit type conversion of UDTs for system operators and functions, including INDEX, is a Teradata extension to the ANSI SQL standard. To disable this extension, set the DisableUDTImplCastForSysFuncOp field of the DBS Control Record to TRUE. For details, see Teradata Vantage™ - Database Utilities , B035-1102 .

INDEX does not support CLOBs or BLOBs.