15.00 - Rules For tosql Transform Routines - Teradata Database

Teradata Database SQL Data Definition Language Detailed Topics

prodname
Teradata Database
vrm_release
15.00
category
Programming Reference
featnum
B035-1184-015K

Rules For tosql Transform Routines

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.