Argument Types and Rules

Teradata Vantageā„¢ SQL Functions, Expressions, and Predicates

brand
Software
Teradata Vantage
prodname
Teradata Database
Teradata Vantage NewSQL Engine
vrm_release
16.20
category
Programming Reference
featnum
B035-1145-162K

If arg is not FLOAT, the value is converted to FLOAT, based on implicit type conversion rules. If the argument cannot be converted, an error is reported. For more information, see Teradata Vantageā„¢ Data Types and Literals, B035-1143.

If arg is a UDT, the following rules apply:
  • The UDT must have an implicit cast to any of the following predefined types:
    • Numeric
    • Character
    • DATE

      To define an implicit cast for a UDT, use the CREATE CAST statement and specify the AS ASSIGNMENT clause.

  • Implicit type conversion of UDTs for system operators and functions, including EXP, is a Teradata extension to the ANSI SQL standard. To disable this extension, set the DisableUDTImplCastForSysFuncOp field of the DBS Control Record to TRUE.
EXP cannot be applied to the following types of arguments:
  • BYTE or VARBYTE
  • BLOB or CLOB
  • CHARACTER or VARCHAR if the server character set is GRAPHIC