The name of the function in the C or C++ source code follows the C function naming conventions, with the additional restrictions that it follows database object naming rules. For more information about object naming, see Teradata Vantage™ - SQL Fundamentals, B035-1141.
In C++, the function definition must be preceded by extern "C" so that the function name is not converted to a C++ overloaded name. For example:
extern "C"
void getregion( VARCHAR_LATIN *region, char sqlstate[6])
{
...
}
The function can call any module written in C++.
When you use the CREATE PROCEDURE or REPLACE PROCEDURE statement to install the external stored procedure, you specify the name of the C or C++ function. For more information, see Specifying the C/C++ Function Name.
On Linux, long names can sometimes cause errors when you install an external stored procedure. For more information, see Argument list too long.