16.20 - Argument Types and Rules - Teradata Database

Teradata Vantage™ - SQL Functions, Expressions, and Predicates

Advanced SQL Engine
Teradata Database
March 2019
Programming Reference

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.