You use the CALL statement or a function call to execute an external C stored routine. When the CALL statement or an SQL statement specifying a function call executes, the C function is called as the external C stored routine and executed on the server machine.

• C stored procedure
  Use the CALL statement to execute a C function as a C stored procedure.
  
• C stored function
  Use an SQL statement specifying a function call to execute a C function as a C stored function.
  

For details about the CALL statement and function calls, see the HiRDB Version 9 SQL Reference manual.

The following figure shows an example of executing an external C stored routine.

Figure 10-8 Example of external C stored routine execution