16.20 - Rules For tosql Transform Routines - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Detailed Topics

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Release Date
March 2019
Content Type
Programming Reference
Publication ID
B035-1184-162K
Language
English (United States)

A tosql routine transforms a predefined data type to a UDT.

The tosql transform routines are generally used by utilities such as FastLoad to convert incoming client data directly into its corresponding UDT data type in Teradata Database.

The rules for tosql routines are as follows:

  • The tosql transform routine can only be a UDF.

    methods are not valid.

  • The tosql UDF transform routine must be defined as DETERMINISTIC.
  • The tosql UDF transform routine must have one and only one declared parameter, which must be a predefined data type.

    The RESULT data type must be the UDT.

  • The tosql UDF transform routine must be contained within the SYSUDTLIB database.
  • If you declare both a tosql transform routine and a fromsql routine, then the declared parameter data type of the tosql routine must be identical to the RESULT data type of the fromsql routine.