16.20 - Restrictions on Declaring an External C++ Table Function - 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)

If you specify CPP in the LANGUAGE CLAUSE, then you must declare the main C++ function as extern “C” to ensure that the function name is not converted to an overloaded C++ name. For example:

extern “C”
void my_cpp(long int *input_int, long int *result, char sqlstate[6])
{

See Teradata Vantage™ SQL External Routine Programming , B035-1147 for details.