Table Entry Validation Exit Procedure Interface › Table Entry Validation Exit Procedures

Table Entry Validation Exit Procedures

A table entry validation exit procedure interface is available for Common Application Services (CAS) tables.

Table entry validation exit procedures are installation-written NCL procedures that are available for performing specialized processing when a table entry is being maintained.

Table entry validation exit procedures are optional. You specify the table entry validation exit procedure when you define a table. The table entry validation exit procedure is called during table entry maintenance functions Add, Update, and Delete.

You write your own table entry validation exit procedures by using variables described in the following sections.

The variables can be divided into two groups as follows:

• The first group of variables provide information to the procedure and are not modifiable (read-only). In particular, check the value of &$VMEXFUNC to determine the operation being processed for you to implement the required special processing.
• The second group of variables are modifiable and enable the procedure to return information to the system. Some of these variables are set with values already, but the procedure can change those values.