How is the keyword DUMMY used in JCL?

For an output file DUMMY specifies that the output is to be discarded. For input it specifies that the file is empty.

Interview Candidate
Oct 13th, 2004
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bhindhu

Aug 16th, 2006

dummy is used when files are not using, it will skip while executing these files.it may or may not correct.refer book renede

vivek,hyd

Aug 16th, 2006

gave a query

manik

Apr 16th, 2007

SELECT SALARY FROM TABLE.A WHERE N=(SELECT COUNT(*) FROM TABLE.B WHERE B.SALARY>=A.SALARY)

in this case we have to use alias.

Here N is nay no.

kkkanagaraj
Profile Answers by kkkanagaraj Questions by kkkanagaraj

Jul 11th, 2007

Please give a situation where exactly the DUMMY is used?

sudhakarchandu

Sep 28th, 2007

The key word DUMMY is used in IEFBR14 utility
It is doing nothing utility
the syntax : //sysin dd dummy
it is not passing any values but it is essential while using the IEFBR14 utility.

naresh.somapalyam
Profile Answers by naresh.somapalyam

May 28th, 2008

If u r not giving any input values using below control card

i.e. in the sysin dd *

Then we r using this.

When we r using this dummy o/s simulates the presence of this file.
When u r reading a file o/s sends the end of file request to the program.

ok bye....