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Status Not under consideration
Workspace PL/I Compilers
Created by Guest
Created on Mar 30, 2016

RELATED IDEAS

REPOSITION Option on the READ Statement

Add the ability to reposition the current record pointer within a sequential dataset.

Go back to the beginning of a dataset without closing it and re-opening it:

READ FILE (MYFILE) INTO (MYLAYOUT) REPOSITION(1)

Additionally, be able to reposition to any previous record that has already been read and passed. If I'm on record 100, and I need to go back to record 90:

READ FILE (MYFILE) INTO (MYLAYOUT) REPOSITION(90)

Also allow this to get to record 90 from record 100:

READ FILE (MYFILE) INTO (MYLAYOUT) REPOSITION(-10)

The IGNORE option on the READ statement already allows quasi-repositioning going forward to skip records. This new statement I think will be better because it should allow the user to go forward or backward and not have to actually read any intermediate records, rather just reposition the record pointer before the actual READ is performed.

This is similar to the z/OS Fortran REWIND statement, except better.

Idea priority Low
  • Guest
    Reply
    |     May 12, 2016

    This can be done today with type=u files, but for most other files this would be hard to impossible

  • Guest
    Reply
    |     Apr 11, 2016

    Reviewing.

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