On Wed, Jan 12, 2011 at 3:01 PM, Cris Hernandez #9 <[email protected]>wrote:
> ok, let's back up to the beginning. why would anyone want to put their > data into a SYSIN DD * ? > doesn't sound like anything that would happen in a production environment, > or QA testing, so that leaves unit testing in development, ad hoc reporting > and classroom exercises. > happens frequently in production on restarts with a dd override. > > If it isn't production or Quality Assurance, do whatever suits you, but the > answer to your questions... > > how to corrupt your in-stream data: > 1) edit with ISPF > - caps on-off > - change all's > - accidental keystrokes > - datatype, lrecl restrictions > - unprintable characters > - TSO inexperience > - inadvertant tabs, spacing > > Copying the data to a flat file keeps the raw data separate and somewhere > it won't be lost or edited unless editing is required, plus its reusable by > other JCL members. > > > --- On Wed, 1/12/11, Paul Gilmartin <[email protected]> wrote: > > > From: Paul Gilmartin <[email protected]> > > Subject: Re: passing instream sysin to next step > > To: [email protected] > > Date: Wednesday, January 12, 2011, 12:56 PM > > On Tue, 11 Jan 2011 15:44:20 -0800, > > Cris Hernandez #9 wrote: > > > > >I agree with this post. Why read the same file twice > > other than to make a copy of it, especially when it's > > something as easily corruptible as raw, instream data coded > > within JCL. > > > > > What makes instream data so "easily corruptible"? > > > > Well, OK, as recently as yesterday I typed "SAVE" with my > > cursor in the > > data rather than on the command line. (I recovered in > > time.) > > > > But how does adding an IEBGENER step make the process more > > resistant > > to this or any such error compared to simply reading the > > SYSIN twice > > (if that were possible)? > > > > Related question: Long ago an Expert told me it was > > forbidden to > > open SYSIN, read it, close it, reopen it and read it again > > in the > > same step. (I had asked him why he preceded a > > Waterloo SCRIPT step > > with IEBGENER to a temp DSN.) By recent experience, I > > can reread > > SYSIN (within a single step). Has something changed, > > or was my > > mentor mistaken long ago? (I think it was MVS 3.8.) > > > > -- gil > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access > > instructions, > > send email to [email protected] > > with the message: GET IBM-MAIN INFO > > Search the archives at http://bama.ua.edu/archives/ibm-main.html > > > > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
