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Using JCL statement keywords and symbols to override JCL z/OS MVS JCL Reference SA23-1385-00 |
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You can use JCL statement keywords and symbols to override existing JCL. JOB statement keyword parameters are those keywords defined for the MVS™ JCL JOB statement. These keywords will add to or override the specification of the JOB statement keywords. The EXEC statement keyword parameters are those keywords defined for the MVS JCL EXEC statement. The treatment of these keywords depends on whether the target of the START command is a job or a procedure. See the following table. EXEC keywords that are also JOB keywords, such as TIME and REGION, are treated as JOB keywords. In this next example, assume ABC is a procedure, not a job. The
following START command creates a REGION=200K parameter on the JOB
statement and a DYNAMNBR=2 parameter on the EXEC statement:
The result of the command is the following JCL:
You can use symbols to override other symbols that are specified
in the procedure to be started. For example, the following command
starts customer information control system (CICS®) with
a 20K region:
A=20K overrides A=10K on the following PROC statement:
The command results in the following JCL:
Note: Select names for symbols carefully; see Coding symbols in JCL for rules to use when coding and naming symbols.
The following table describes the actions that result from specifying various keywords and symbols on the START command:
Note 1: Other does not include the START command reserved words SUB, JOBNAME, and JOBACCT. |
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