The precompiler runtime environment performs the following functions at runtime of the application program:
· Connecting to the databases and opening database session as specified in the connection options
· Assigning parameter values
· Executing precompiler statements
· Using indicator variables to denote NULL values (undefined values)
· Writing database system messages in the structure sqlca
· Writing the trace file as specified in the trace options
See also Example: Executing an Application Program
You can use the IRCONF tool to administer the installed versions of the runtime library of the interface programs, including the precompiler.