Variable substitution in z/OS® JCL procedures
Variable substitution does not take place within JCL procedures. If you have z/OS® JCL variables within such procedures, their substitution is independent of any substitution made by HCL Workload Automation for Z. Even if the z/OS® JCL variable name is the same as an HCL Workload Automation for Z variable name, the values assigned to the two variables will be unrelated. However, if you want the variable reference outside the procedure to be substituted by z/OS®, you can define the HCL Workload Automation for Z-variable with the attribute DEF= (value not required). with the attribute DEF=blank (value not required).
If a variable is given a value of (blank), the If a variable is given a value of blank, the variable will not be substituted if the variable definition states that no value is required. This lets these variables undergo normal JCL substitution after the tailoring performed by HCL Workload Automation for Z. If a variable is given a default value of ¬ (logical not), the variable is deleted from the line.
This means that z/OS® substitutes the variables that have a blank, or not-required, value. HCL Workload Automation for Z substitutes the variables that have values that are not blanks, as well as variables that require values.
This means that MVS™ substitutes the variables that have a blank, or not-required, value. HCL Workload Automation for Z substitutes the variables that have values that are not blanks, as well as variables that require values.
Because procedures are called after HCL Workload Automation for Z substitution has taken place, a situation in which a procedure variable is assigned an HCL Workload Automation for Z variable value can occur. Consider the JCL in Substituting a variable in a procedure: job JCL and the procedure in Substituting a variable in a procedure: procedure JCL.
//EXEC PROC=MYPROC
//DD2 DD DSN=MY.&DS2,DISP=SHR//EXEC PROC=MYPROC
//DD2 DD DSN=MY.&DS2,DISP=SHRIf DS2 is defined as an HCL Workload Automation for Z variable,
it is substituted in the usual way.
//MYPROC EXEC PGM=IKJEFT01,DYNAMNBR=50,REGION=4096K
//DD2 DD DSN=MY.&DS2,DISP=SHR//MYPROC EXEC PGM=IKJEFT01,DYNAMNBR=50,REGION=4096K
//DD2 DD DSN=MY.&DS2,DISP=SHRDD2 occurs
in the procedure MYPROC, the entire JCL line will
be substituted in the procedure, including the HCL Workload Automation for Z substituted
value of DS2: //DD2 DD DSN=MY.&DS2,DISP=SHRAny value that the variable DS2 is assigned within the procedure is not
substituted in this line because, as far as z/OS® is
concerned, the variable DS2 does not occur. If you want the variable to take the
value assigned by the procedure rather than the HCL Workload Automation for Z value, you can give the
variable a default value of (blank) and set the VALUE REQUIRED
attribute to ‘Nʼ in the HCL Workload Automation for Z database using the JCL
VARIABLE DEFINITION panel. This causes HCL Workload Automation for Z to ignore the variable when
performing variable substitution.