Request processing follows these steps:
The client application issues a request (for example, a select statement).
The client API (for example, CT-Library or ODBC) receives the request and sends it to the DB2 access service.
The DB2 access service receives the request, transforms it (if needed), and it executes the request through the Mainframe Connect DB1 UDB Option.
After the request processes, the DB2 access service converts target datatypes to Open Server datatypes and returns the results to the client application.
The client application disconnects from the DB2 access service.
Figure 5-1 shows the processing flow of the APIs through DirectConnect for z/OS Option.
Figure 5-1: Processing flow through API to DB2
For more information about Open Client and Open Server products, see the Open Client Client-Library/C Reference Manual and the Open Server Server-Library/C Reference Manual.
