The JCLs are built starting from CBTUNLD1 skeleton, which can be customized. The CBTUNLD2 skeleton is an alternative skeleton where the UNLOAD utility is used instead of the DSNTIAUL utility.
The structure of the skeleton comprises a starting part and an ending part that are repeated once in the created JCLs, and a central part that is delimited by the following keywords:
|
//* SINGLE FILE ELABORATION and //* SINGLE FILE END ELABORATION, that is repeated for each file. |
In the skeleton some variables are used, and they are changed into the JCL values using the values stored in the Knowledge Base or included in the launch parameters.
The following table describes the used variables:
| Variable | Description |
|---|---|
| &NUM |
Numeric progressive |
| &UNLOUTNAM |
Name of the sequential data set (output of extraction process) |
| &PCYL |
Primary quantity |
| &LRECL |
Record length |
| &UNIT |
SYSDA or the value put in the launch screen, depending on the above described rules |
| &CYL |
It can be TRK (if the space is less than a cylinder) or CYL |
| &SCYL |
Secondary quantity |
| &OWNAME |
Owner of the original table |
| &FILNAME |
Name of the original table |
| &DBNAME |
Database of the original table |
| &TSNAME |
Tablespace of the original table |
| &UNLINPNAM |
The unload name as it can be seen in "Work with files" |
| &STEP |
The step name (automatically generated) |
| &JOBN |
It is actualized with the JCL name |