A Client Option application calls a pre-written procedure, such as a stored procedure or a Server Option application. All calls from the Client Option to remote nodes are processed using the TCP/IP communications protocol. For requests to an Open Server (LAN), the client can access any data available to the Open Server application. If the request is to the Server Option, the client can access any data storage system accessible through CICS.
The called procedure or transaction executes and returns results to the calling Client Option application, which can use the results for local processing. If the client has permission, the client transaction can update data at remote sites by inserting, modifying, and deleting entries in database tables or other data storage systems.
The Client Option includes isql, a utility that allows users to send SQL language commands interactively. Users specify the server and whether to enable tracing, then type SQL commands in a 3270 panel. For more information about using isql with the Client Option, see Chapter 4, “Using isql.”
For TCP/IP, the Client Option includes a Server-Host Mapping Table that allows you to define servers. For more information, see “Customizing the TCP/IP driver (SYGWHOST).”
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