16.20 - Argument Types and Rules - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Functions, Expressions, and Predicates

Teradata Database
Teradata Vantage NewSQL Engine
March 2019
Programming Reference

POSITION operates on the following types of arguments:

  • Character, except for CLOB
  • Byte, except for BLOB

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

  • Numeric

    Numeric string expressions are 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 the CREATE CAST statement and specify the AS ASSIGNMENT clause. For more information 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 POSITION, 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 .