SIGNON Statement—Initiates an Online or a Batch Session

The SIGNON statement initiates an online or batch session of the system generation compiler and allows you to specify:

The id and password of the user to be signed on to the system if not already signed on
The data dictionary to be accessed by the compiler in a multiple dictionary environment
Note: The teleprocessing network for a DC/UCF system can be defined only in a data dictionary that contains device definitions. Device definitions are stored in the installation default dictionary during installation. For more information about storing device definitions in a data dictionary, see the CA IDMS Installation and Maintenance Guide—z/OS.
The node that controls the dictionary to be accessed by the compiler
The usage mode in which each dictionary area is to be accessed

How the Compiler Performs a Signon Operation

When invoked, the system generation compiler automatically performs a signon operation using:

The id of the user that is currently signed on to the DC/UCF system or the user running the batch job
The current session default dictionary
The current session default dictionary node

Therefore, you typically do not need to issue an explicit SIGNON statement after you invoke the compiler.

When You Need to Code a SIGNON Statement

The SIGNON statement is required if any of the following conditions apply:

If you have not signed on to the system and the DC/UCF system definition to be accessed is secured in the central security system, then you must issue a SIGNON statement. In this case, the SIGNON statement must include a user ID and a password (if the user ID is associated with a password). The signon also results in your being signed on to the DC/UCF system.
If you are already signed on to the DC/UCF system, you cannot enter a user ID or password on the IDD SIGNON statement.
You want to establish new compiler session parameters; that is, you want to access a different dictionary, or access a dictionary area in a different usage mode. SIGNON forces the termination of the current compiler session and initiates a new session with the specified parameters.
You want to access one or more areas of the data dictionary in a usage mode other than shared update.