The topics that follow provide details about the contents of the C or C++ source code for an external stored procedure. In general, the contents of the C or C++ source code must:
- Define the SQL_TEXT constant
- Include the sqltypes_td.h header file
- Define the parameter list in the order that matches the parameter passing convention specified in the CREATE PROCEDURE statement
A C++ UDF or external procedure must catch all C++ exceptions by the end of the UDF or external procedure code. Any exception that is not caught and is thrown out from the routine may result in unexpected behavior.