15.10 - FUNCTION - Teradata Database

Teradata Database SQL Data Definition Language Syntax and Examples

prodname
Teradata Database
vrm_release
15.10
created_date
December 2015
category
Programming Reference
featnum
B035-1144-151K
function_name
The name of the external UDF to be used to convert source_data_type to target_data_type. The function_name must specify a unique function.
You cannot invoke an SQL UDF from a CREATE CAST or REPLACE CAST request.
If you do not specify a set of data types for a function name, the function must be the only external UDF with that name in the database.
The function can have only one parameter. The result data type must be the same as target_data_type. The function must be defined to be deterministic. The function name must identify an external UDF in the SYSUDTLIB database.
data type
The parameter data type must be the same as source_data_type.
UDT_name
The parameter data type must be the same as source_data_type.