Read a value from file and display on terminal

ParagChouguley · Posted: Fri Oct 17, 2008 10:44 am

I want to read a value from file and display on terminal using JCL ?
The file is FB flat file.

dick scherrer · Posted: Fri Oct 17, 2008 11:00 am

Hello,

What kind of terminal do you have an nterface to from jcl?

What you want to do needs to be better defined.

Please post what type of terminal (cics, tso/ispf, other) and any other details that will help us help you.

ParagChouguley · Posted: Fri Oct 17, 2008 11:10 am

Hi Dick,
Thanks for quick reply !
I want to disply it on TSO/ISPF terminal !

expat · Posted: Fri Oct 17, 2008 11:14 am

Well you can't use a batch job as the TSO session and the batch job are completely different address spaces.

dick scherrer · Posted: Fri Oct 17, 2008 11:27 am

You're welcome

ParagChouguley · Posted: Fri Oct 17, 2008 11:54 am

OK..........seems I have to tell my original requirement ! :-)
I want to develop a REXX program and use as a TSO comamnd. This will serve a purpose of counting no of records in a VSAM file. Now I tried to write it in a pure REXX. It noticed 2 disadvantages.
1) Terminal remians hanged till the entire file is read. This is a problem for big files.
2) For big files I got error saying no space for read data.
To avoid this I turned to JCL thru rexx option.

Now,
a) Is there any function in REXX that will give record count without rading or saving read records ?
b) any other option in REXX to solve space problem and which will work fast ( as terminal remains hanged ) ?

expat · Posted: Fri Oct 17, 2008 12:10 pm

1) LISTCAT will give a record count - but only valid from the last time that the cluster was sucessfully closed.

2) SORT is fast and can be run from the terminal